MD-MT20/20C/20W CONTENTS Page SAFETY PRECAUTION FOR SERVICE MANUAL (MD-MT20W ONLY) .............................................................................. 2 SPECIFICATIONS ................................................................................................................................................................. 3 NAMES OF PARTS ............................................................................................................................................................... 4 OPERATION MANUAL .......................................................................................................................................................... 5 QUICK GUIDE (MD-MT20 ONLY) ......................................................................................................................................... 8 DISASSEMBLY .................................................................................................................................................................... 10 REMOVING AND REINSTALLING THE MAIN PARTS ....................................................................................................... 11 ADJUSTMENT ...................................................................................................................................................................... 12 NOTES ON SCHEMATIC DIAGRAM .................................................................................................................................. 25 TYPES OF TRANSISTOR AND DIODE .............................................................................................................................. 25 VOLTAGE ............................................................................................................................................................................ 26 BLOCK DIAGRAM ............................................................................................................................................................... 27 SCHEMATIC DIAGRAM ...................................................................................................................................................... 28 WIRING SIDE OF P.W.BOARD ........................................................................................................................................... 31 WAVEFORMS OF MD CIRCUIT ......................................................................................................................................... 36 TROUBLE SHOOTING ........................................................................................................................................................ 37 FUNCTION TABLE OF IC .................................................................................................................................................... 40 CIRCUIT DESCRIPTION ..................................................................................................................................................... 42 PARTS GUIDE/EXPLODED VIEW PACKING OF THE SET (MD-MT20 ONLY) SERVICE MANUAL SHARP CORPORATION No. S6943MDMT20// This document has been published to be used for after sales service only. The contents are subject to change without notice. MD-MT20(S) MD-MT20C(S) MD-MT20W(BL) MD-MT20W(GL) MD-MT20W(S) • In the interests of user-safety the set should be restored to its original condition and only parts identical to those specified be used. Illustration: MD-MT20/20C Illustration: MD-MT20W
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MD-MT20/20C/20W
– 1 –
CONTENTSPage
SAFETY PRECAUTION FOR SERVICE MANUAL (MD-MT20W ONLY).............................................................................. 2SPECIFICATIONS ................................................................................................................................................................. 3NAMES OF PARTS ............................................................................................................................................................... 4OPERATION MANUAL .......................................................................................................................................................... 5QUICK GUIDE (MD-MT20 ONLY) ......................................................................................................................................... 8DISASSEMBLY .................................................................................................................................................................... 10REMOVING AND REINSTALLING THE MAIN PARTS ....................................................................................................... 11ADJUSTMENT ...................................................................................................................................................................... 12NOTES ON SCHEMATIC DIAGRAM .................................................................................................................................. 25TYPES OF TRANSISTOR AND DIODE .............................................................................................................................. 25VOLTAGE ............................................................................................................................................................................ 26BLOCK DIAGRAM ............................................................................................................................................................... 27SCHEMATIC DIAGRAM ...................................................................................................................................................... 28WIRING SIDE OF P.W.BOARD ........................................................................................................................................... 31WAVEFORMS OF MD CIRCUIT ......................................................................................................................................... 36TROUBLE SHOOTING ........................................................................................................................................................ 37FUNCTION TABLE OF IC.................................................................................................................................................... 40CIRCUIT DESCRIPTION ..................................................................................................................................................... 42PARTS GUIDE/EXPLODED VIEWPACKING OF THE SET (MD-MT20 ONLY)
SERVICE MANUAL
SHARP CORPORATION
No. S6943MDMT20//
This document has been published to be usedfor after sales service only.The contents are subject to change without notice.
• In the interests of user-safety the set should be restored to itsoriginal condition and only parts identical to those specified beused.
Illustration: MD-MT20/20C
Illustration: MD-MT20W
MD-MT20/20C/20W
– 2 –
Figure 2-1 Figure 2-2
Precaution to be taken when replacing and servicing the Laser Pickup.The AEL (Accessible Emission Level) of Laser Power Output for this model is specified to be lower than Class I Requirements.However, the following precautions must be observed during servicing to protect your eyes against exposure to the laser beam.(1) When the cabinet has been removed, the power is turned on without a compact disc, and the Pickup is on a position
outer than the lead-in position, the Laser will light for several seconds to detect a disc. Do not look into the Pickup Lens.(2) The Laser Power Output of the Pickup inside the unit and replacement service parts have already been adjusted prior
to shipping.(3) No adjustment to the Laser Power should be attempted when replacing or servicing the Pickup.(4) Under no circumstances look directly into the Pickup Lens at any time.(5) CAUTION - Use of controls or adjustments, or performance of procedures other than those specified herein may result
in hazardous radiation exposure.
SAFETY PRECAUTION FOR SERVICE MANUAL (MD-MT20W ONLY)
VARO ! Avattaessa ja suojalukitus ohitettaessa olet alttiina näkymättömälle lasersäteilylle. Älä katso säteeseen.VARNING! Osynlig laserstralning när denna del är öppnad och spärren är urkopplad. Betrakta ej strälen.
Precaution to be taken when replacing and servicing the laser pickup.The following precautions must be observed during servicing to protect your eyes against exposure to the laser.
Warning of possible eye damage when repairing:If the AC adaptor or batteries are connected when the top houising (disc cover) of the unit is removed, and the PLAY key ispressed, the laser will light up during focus access (2-3 seconds). (Fig. 2-1) During the operation, the laser will leak from theopening between the magnetic head and the mechanical chassis (Fig. 2-2). In order to protect your eyes, you must not lookat the laser during repair. Before repairing be sure to disconnect the AC adaptor and remove the batteries.
This Portable MiniDisc Recorder is classified as a CLASS 1 LASER product.The CLASS 1 LASER PRODUCT label is located on the bottom.Use the Portable MiniDisc Recorder only in accordance with the instructions given inthis manual and do not attempt to interfere with the interlock switch or make anyother adjustment as this may result in exposure to hazardous radiation.
Magnet Head Laser Beam
Optical Pick-UpMain PWBSpindle motor
MechanismChassis
MD-MT20/20C/20W
– 3 –
FOR A COMPLETE DESCRIPTION OF THE OPERATION OF THIS UNIT, PLEASE REFER TOTHE OPERATION MANUAL.
SPECIFICATIONS
Specifications for this model are subject to change without priornotice
General
Power source: DC 2.4V: Rechargeable Nickel-Metal Hydride battery (AD-T20BT) x 1
DC 5V: AC adaptor (AC 110 - 240V, 50/60 Hz)DC 3.0V: Commercially available, “AA” size (LR6), alkaline
battery x 2DC 4.5V: Separately available car adaptor, AD-CA20X
(for cars with a 12-24V DC negative earth electri-cal system)
Charging time: Approx. 4 hours (90 %)Approx. 6 hours (fully charged)(When using the AC adaptor included with the unit)
Battery life:When using the rechargeablebattery (fully charged) includedwith the unit
When using two, commerciallyavailable, high capacity, “AA”size (LR6), alkaline batteries
Continuous recording:Approx. 7.5 hours
Continuous recording:Approx. 7.5 hours
Continuous play:Approx. 12 hours
Continuous play:Approx. 15 hours
Unmeasurable (less than ±0.001% W. peak)
The continuous recording time is for analogue inputs when the volume level is set to“VOL 0”.The continuous play time shows the value when the volume level is set to “VOL 15”.The above values are the standard values when the unit is charged and used at anambient temperature of 20°C (68°F).The operating time when using an alkaline batteries may be different, depending onthe type and manufacturer of the battery, and on the operating temperature.
Charging time: Approx. 4 hours (90 %)Approx. 6 hours (fully charged)(When using the AC adaptor included with the unit)
Battery life:When using the rechargeablebattery (fully charged) includedwith the unit
When using two, commerciallyavailable, high capacity, “AA”size (LR6), alkaline batteries
Continuous recording:Approx. 7.5 hours
Continuous recording:Approx. 7.5 hours
Continuous play:Approx. 12 hours
Continuous play:Approx. 15 hours
Unmeasurable (less than ±0.001% W. peak)
● The continuous recording time is for analog inputs when the volume level is set to “VOL0”.
● The continuous play time shows the value when the volume level is set to “VOL 15”.● The above values are the standard values when the unit is charged and used at an
ambient temperature of 68°F (20°C).● The operating time when using an alkaline battery may be different, depending on the
type and manufacturer of the battery, and on the operating temperature.
Coding: ATRAC (Adaptive Transform Acoustic Coding), 24-bit com-puted type
Recording method: Magnetic modulation overwrite method
Sampling frequency: 44.1 kHz (32 kHz and 48 kHz signals are converted to 44.1 kHz,and then recorded.)
Wow and flutter:
MD-MT20/20C MD-MT20W
MD-MT20/20C/20W
– 4 –
NAMES OF PARTSIllustration: MD-MT20/20CMain unit
1. Monaural Long-Play Mode Indicator 2. Record Indicator 3. Level Meter 4. Fast Play Indicator 5. Repeat Indicator 6. TOC Indicator 7. Battery Indicator 8. Random Indicator 9. Track Number Indicator10. Character/Time Information Indicator11. Synchro Recording Indicator12. Disc Mode Indicator13. Disc Name Indicator14. Track Name Indicator15. Remaining Recording Time Indicator16. Total Track Number Indicator
17. Edit/Auto Mark/Time Mark Button18. Mode Button19. Display/Character Select Button20. Bass/Delete Button21. Enter/Fast Play/Synchro Button22. Volume Up/Cursor Button23. Volume Down/Cursor/Charge Button24. Record/Track Mark Button25. Fast Reverse/Recording Level Down/
Name Select Button26. Stop/Power Off Button27. Play/Pause Button28. Fast Forward/Recording Level Up/
Cares before disassemblingWhen assembling the machine after disassembling orrepair, observe the following requirements so as to ensuresafety and performance.1. Remove the batteries from the machine, and take out the
mini-disc.2. When assembling after repair, be sure to restore the
initial location of wires.Since the screws are small, incorrect fixing may result inmalfunction.
3. When repairing, pay utmost attention to static electricityof IC.
REMOVAL PROCEDURESTEP FIGURE
Figu re 10-1
Figure 10-2
Figure 10-3
Caution:Carefully handle the main PWB and flexible PWB. After removing theflexible PWB (1*) for the optical pickup from the connector, do nottouch directly the front end of flexible PWB with your hand so as toprevent damage of optical pickup by static electricity.
Mechanism Unit
Figure 10-4
Open Lever
BottomCabinet
LCDKey Switch
Top Cabinet
(A1)x2ø1.4x2mm(A1)x2
ø1.4x2mm
(A1)x2ø1.4x2mm
(A1)x1ø1.4x2mm
(B1)x2ø1.4x2mm
(B2)x1ø1.4x2mm
(B1)x2ø1.4x2mm
OpenOpen
(C2)x2
pullpull
pull
pull
pull
pullpull
pull
LCD
(D1)x1
MainPWB
(E2)x2ø1.7x2.5mm
AudioPWB
MechanismUnit(E1)x1
Key Switch
Put the fold on the connector, and apply with the felt. Sagging may result in contact with the sheet metal.
Felt
(D1)x1*Flexible PWB for optical pickup
(F1)x3ø1.7x2.5mm
Audio PWB
MD-MT20/20C/20W
– 11 –
REMOVING AND REINSTALLING THE MAIN PARTSRemove the mechanism according to the disassembling meth-ods 1 to 4. (See Page 10.)
How to remove the spindle motor (See Fig. 11-1.)1. Remove the solder joint (A1) x 1 of flexible PWB.2. Remove the screws (A2) x 3 pcs., and remove the spindle
motor.
Figure 11-5
Figure 11-1
Figure 11-2
Figure 11-3How to reinstall the optical pickup unit(See Fig. 11-5.)1. Remove the screw (E1) x 1 pc.2. Slowly raise the optical pickup.
How to remove the magnetic head (See Fig. 11-4.)1. Remove the screws (D1) x4 which connects the magnetic
head to the head relay flexible PWB, remove the springwashers (D2) x 2 and remove the soldering joints (D3) x 2.
Note:Mount carefully so as not to damage the magnetic head.(If the gear is damaged, noise is caused.)
Figure 11-4
How to remove the head up/down motor(See Fig. 11-2.)1. Remove the solder joints (B1) x 2 of head up/down motor
lead wire.2. Remove the screw (B2) x 1 pc., and remove the flexible
PWB.3. Remove the screw (B3) x 1 pc., and remove the head up/
down motor.Note:Take care so that the motor gear is not damaged.(If the gear is damaged, noise is caused.)
How to remove the sled motor (See Fig. 11-3.)1. Remove the stop washer (C1) x 1 pc., and remove the drive
gear (C2) x 1 pc.2. Remove the screws (C3) x 2 pcs., and remove the sled
motor.3. Remove the solder joints (C4) x 2 of flexible PWB.Note:Take care so that the motor gear is not damaged.(If the gear is damaged, noise is caused.)
Entering the TEST mode1. Setting at port (power nonconnected state)
(1) Set the port as follows. TEST1 : "Low" (TP416) TEST0 : "High"(2) Turn the Power ON.(3) Test Mode STOP [ T E S T _ ]
2. Setting by special button operation (in standby state)(1) Holding down the DISP button and ENTER button, press the PLAY button.(2) Normal mode setting initialization (BASS setting, VOL setting, etc.)*Since the unit is changed to the setting for production line inspection , be sure to set it to the default setting state in the following default setting procedure before returning it to the user.(3) Indication of microcomputer version for one second [ 3 1 8 A f X ]
(4) Whole LCD lighting for 2 seconds(5) Test Mode STOP [ T E S T _ ]*When the PLAY button is pressed during indication (3) and (4), the process proceeds to (5).
1 High reflection disc MMD-110 (TEAC Test MD) 88GMMD-110
ADJUSTMENT Test discMD adjustment needs two types of disc, namely recording disc (low reflection disc) and playback-only disc (highreflection disc).
Type Test disc Parts No.
Note: Use the low reflection disc on which music has been recorded.
EEPROM version
Destination
Leaving the TEST mode(1) Press the STOP button in the TEST mode stop state or version indicating state or whole LCD lighting state.
Test Mode
Microcomputer version
Shipping setting methodHolding down simultaneously the VOLUME-DOWN Button and PLAY Button of the set unit without disc, supply the power from the DC IN plug.After the indication "INIT" -> "BYE OK" disappears, release the power supply of DC IN.
1. AUTO 1 Mode • Perform preliminary automatic adjustment.• If the combination of mechanism and pickup PWB has been changed, be sure to start from
AUTO1.2. AUTO 2 Mode • Perform ATT (attenuator) automatic adjustment.
rate display (groove section)• The temperature correction is performed only when
servo start is performed, but the posture correctionis not performed during continuous playback.
4. TEST-REC Mode • Continuous record from the specified addressis performed.
• Change of record laser output(servo gain is alsochanged according to laser output).
• The temperature correction is performed onlywhen servo start is performed, but the posturecorrection is not performed during continuousrecording.
5. MANUAL 1 Mode • Temperature is displayed. (Updating in real time)• Seeing the displayed adjustment value, perform preliminary manual adjustment. (Error rate indication, jump test)
6. MANUAL 2 Mode • Temperature is displayed. (Updating in real time)• Seeing the displayed adjustment value perform
manfully the preliminary adjustment. (Error rate indication, jump test)• Continuous playback is performed (error rate display, jump test).
7. RESULT 1 Mode • The value adjusted in AUTO1 or MANUAL1 is indicated.• (Execution in servo "OFF" state").
8. RESULT 2 Mode • The value adjusted in AUTO 2 or MANUAL 2 is indicated.• Adjustment value is changed manually. (error rate display, jump test).
9. DIGITAL INPUT Mode • Digital input information is displayed.10. ERROR INFORMATION • Error information is displayed. Mode • Error information is initialized11. NORMAL Mode • The mode is changed from the TEST mode to
the normal mode without adjustment.• In the normal mode the internal operation mode,
memory capacity, etc. areindicated.• In the normal mode both temperature correction
and posture correction are perfomed.12. EEPROM Mode • Factors of digital servo are changed manually.
(Each servo is turned on individually.)• Cut-off frequency of BASS1, BASS2 and BASS3
is selected manually.• Temperature detection terminal voltage is
measured, and the reference value is set.• Defaults are selected and set.• Setting of EEPROM protect area is updated.
(In case of protect releasing)13. INNER Mode • Determine the position where the INNER switch
is turned on. (only high reflection disc).• The temperature correction is performed only
when servo start is performed, but the posturecorrection is not performed.
MD-MT20/20C/20W
– 13 –
Operation in each TEST mode1. AUTO1 Mode• When the STOP button is pressed while the AUTO1 menu appears or during automatic adjustment, the mode changes to the TEST mode
stop state. At this time the adjustment value is not output.• Be sure to adjust, using the specified disc MMD-213A or MMD-212. At this time release the EEPROM (IC402) protection. (Refer to EEPROM write procedure.)• Adjustment NG; Adjustment item out of range, focus ON failure, and adjustment error• When the PLAY button is pressed while ADJ. OK is displayed, AUTO2 is executed.
2. AUTO2 Mode• When the STOP button is pressed while the AUTO2 menu appears or during automatic adjustment, the mode changes to the TEST mode
stop state. At this time the adjustment value is not output.• Adjustment NG; Adjustment item out of range, and adjustment error.• When the PLAY button is pressed while ADJ. OK is displayed,TEST_PLAY is executed.
3. TEST-PLAY Mode• When the STOP button is pressed while the TEST-PLAY menu appears, or in TEST-PLAY or continuous playback mode, the mode
changes to the TEST mode stop state.• When the PLAY button is pressed while the TEST-PLAY menu appears,continuous playback is initiated from the current pickup position.• Whenever the DISP button is pressed in the TEST-PLAY menu, the target address changes as follows.
0032 — 03C0 — 0700 — 08A0 — 0950— 0032 —When the PLAY button is pressed while a target address is displayed, continuous playback is performed after searching that address.
• Each time the MODE button is pressed while the TEST-PLAY mode target address is displayed, the digit which is changed by pressing theSKIP UP/DOWN button is changed as follows.
0032 — 0032 — 0032 — 0032 —• When the SKIP UP button is pressed in the TEST-PLAY mode target address is displayed, the digit of address specified by the MODE
button is set to +1h. (0 to F)• When the SKIP DOWN button is pressed in the TEST-PLAY mode target address is displayed, the digit of address specified by the MODE
button is set to -1h. (0 to F)* When the SKIP UP/DOWN button is held down, the setting changes continuously, one cycle being 100 ms.
• When the BASS button is pressed in the continuous playback mode, the number of jump lines changes as follows.1 — 10 — 384 — 1
* After the number of jump lines is indicated for one second, the address indication is restored. [ T R _ ]
• When the SKIP UP button is pressed in the continuous playback mode, the specified number of lines is jumped in the FWD direction.• When the SKIP DOWN button is pressed in the continuous playback mode, the specified number of lines is jumped in the REV direction.
* When the SKIP UP/DOWN button is held down, jump is repeated every approx. 100 ms.•Whenever the DISP button is pressed in the continuous playback mode, the indication changes as follows.
|Continuous playback (C1 error indication) [ C E ]
|Continuous playback (SUBQ address indication) [ S Q ]
* Recordabl diskContinuous playback (ADIP address indication) [ A P ]
|Continuous playback (C1 error indication) [ C E ]
|Continuous playback (ADIP error indication) [ A E ]
|Continuous playback (ADIP address indication) [ A P ]
4. TEST-REC Mode• When the STOP button is pressed while the TEST-REC menu appears, or in the TEST-REC mode or continuous record mode, the mode
changes to the TEST mode stop state.• When the PLAY button is pressed while the TEST-REC menu appears, the continuous record is initiated from the current pickup position.• Whenever the DISP button is pressed in the TEST-REC menu, the target address changes as follows.
0032 — 03C0 — 0700 — 08A0 —0950 — 0032 —When the PLAY button is pressed while a target address is displayed, continuous playback is performed after searching that address. • Whenever the MODE button is pressed in the TEST-REC mode target address is displayed, the digit which is changed by the SKIP UP/
DOWN button changes as follows.0032 — 0032 — 0032 — 0320 —
• When the SKIP UP button s pressed in the TEST-REC mode target address is displayed, the digit of address specified by the BASS buttonis set to +1h.(0 to F)
• When the SKIP DOWN button is pressed in the TEST-REC mode target address is displayed, the digit of address specified by the BASSbutton is set to -1h. (0 to F)
* When the SKIP UP/DOWN button is held down, the setting changes continuously, one cycle being 100 ms.
MD-MT20/20C/20W
– 14 –
5. NORMAL Mode• When the STOP button is pressed while the NORMAL menu appears, the mode changes to the TEST mode stop state.• Indication during operation
Indication of memory capacity on main unit LCD [ ] + Level meter: Internal mode: Address (Cluster section): Address (Sector section)
• Selection of sound volume, BASS, etc. is possible (without indication)• Recording is also possible.• If the STOP button is pressed during operation in the NORMAL mode, the NORMAL mode is canceled, and the power is turned off.
6. Error data display Mode• Reversing when SKIP DOWN button is pressed• When the STOP button is pressed while the error data indication menu appears or during error data indication, the mode changes to the
TEST mode stop state.• Error data 0 is the latest error.• Error which occurred in the TEST mode is also stored in the memory.• When the DISP button is pressed while the error data indication menu appears, the error data is initialized. [ C L E A R _ ]• : Error Code
Explanation of error history code12h : RF side FG, TG, and TCRS adjustment termination failure13h : Adjustment servo retraction excessive retrial16h : C. IN detection time-over17h : A, B, E, F, and TCRSO offset measurement value out of
tolerable range21h : Focus retraction completion allowable time-over23h : Track search completion allowable time-over24h : Disc linear speed measurement failure32h : P-TOC read failure42h : U-TOC read failure44h : U-TOC write data write disabled/read check error52h : SD write data write disabled71h : Pickup position initialization time-over72h : EEPROM data read check sum error73h : Record head drive disabled (by EJECT lever)82h : Power overvoltage detection91h : Ambient temperature is higher that the allowable tempera-
ture.
7. INNER Mode• when the STOP button is pressed on the INNER menu (SQ______ ), the state is changed to the TEST mode STOP state.• : Address
MD-MT20/20C/20W
– 15 –
EEPROM (IC402) writing procedure1. Procedure to replace EEPROM and write initial value of microcomputer in EEPROM
(1) Replace EEPROM.(2) Deprive EEPROM of protection (connect the pins 8 and 6 of IC402).(3) Refer to the latest EEPROM data list.(4) Press the Display button, Ente button and Play button to start the test mode.(5) Version display
[ V e r . ]
EEPROM version (f ~ Z)Microcomputer ROM version
(6) The whole LCD lights.(7) Test mode stop state.
[ T E S T ](8) Press the "BASS" button, and press twice the "SKIP DOWN" button.
[ E E P R O M ](9) Perform the operation to display "EEPROM SETTING MODE CHART", compare the EEPROM DATA LIST with the display,
and set according to the EEPROM DATA LIST with the VOL UP or VOL DOWN key. (10) Set the temperature reference. (Refer to the Temperature Reference Setting Method.) (11) Set according to the EEPROM DATA LIST. (12) Press the Stop button.
[ T E S T ] (13) Press the Stop button. (14) After data is written in EEPROM, turn off power . (15) Restore protection of EEPROM (Disconnect connection made in Step (2) above).
2. Temperature reference setting method[1] Measurement, calculation and setting procedure
(1) Set the TEST mode. • Set TEST 1, 0 = '01', and turn on power (or set PLAY ON in standby state).(2) Start the EEPROM mode 'Temp' menu. • Key operation in order of BASS, SKIP-DOWN x 2 times, PLAY, PLAY in the test mode STOP state. • 'TM$$%%' is displayed. ($$= Temperature code, %% = Temperature reference)(3) Once press SKIP-UP, and determine the displayed microcomputer TEMP input AD value. • 'TPin##' is displayed. (## = TEMP input AD value)(4) At the ambient temperature, determine the temperature corrected value from the temperature measurement value
correction table.(5) Determine the temperature reference, using the following formula. • Temperature reference = Microcomputer TEMP input AD value + Temperature corrected value(6) Set the temperature reference value by button operation , and check whether the temperature code indication corresponds to "Temperature
Code Identification Table".
[2] Temperature measurement value correction table
Ambienttemperature
Temperaturecorrection
+ 9oC ~ +11oC - 05h + 10.0oC
+12oC ~ +14oC - 04h + 12.7oC
+15oC ~ +16oC - 03h + 15.4oC
+17oC ~ +19oC - 02h + 18.2oC
+20oC ~ +22oC - 01h + 20.9oC
+23oC ~ +24oC ± 00h + 23.6oC
+25oC ~ +27oC + 01h + 26.3oC
+28oC ~ +30oC + 02h + 29.0oC
+31oC ~ +33oC + 03h + 31.8oC
Centertemperature
Ambienttemperature
Temperaturecorrection
Centertemperature
- 9oC ~ +10oC 08h + 0.5oC
+ 3oC ~ +21oC 07h + 12.5oC
+15oC ~ +33oC 06h + 23.6oC
+26oC ~ +43oC 05h + 35.0oC
X
MD-MT20/20C/20W
– 16 –
EEPROM DATA LIST (EEPROM version f)TEMP setting
Item display Set valuesT M _ _ Calculate values
ADJ. SET settingItem display Set values
C O K _ A 0 H
F A T _ C 0 H
T A T _ 3 E H
C A T _ 2 0 H
F A B _ E 0 H
BASS settingItem display Set values
B S 1 _ 3 F H
B S 2 _ 1 F H
B S 3 _ E 2 H
Sled settingItem display Set values
S L G _ D F H
S L 2 _ 2 0 H
S L M _ 7 F H
S L V _ D 7 H
S K k _ 7 2 H
S K t _ 7 0 H
S K m _ 7 8 H
W T m _ 2 4 H
M V 1 _ 4 F H
M V 2 _ A A H
S R V _ 0 A H
EQ. SET settingItem display Set values
H Q 1 _ 9 0 H
H Q 2 _ 9 0 H
H S G _ 1 1 H
H S O _ F D H
L Q 1 _ 9 0 H
L Q 2 _ 9 0 H
L S G _ 1 1 H
L S O _ 0 0 H
G Q 1 _ 9 8 H
G Q 2 _ 8 4 H
G S G _ 1 1 H
F L p _ 0 8 H
Control settingItem display Set values
C T 0 _ 0 5 H
C T 1 _ 1 1 H
C T 2 _ 7 F H
C T 3 _ 3 0 H
R C 0 _ C 0 H
R C 1 _ F E H
S Y C _ A 6 H
P W L _ 0 3 H
D R 1 _ 9 2 H
D R 2 _ C 8 H
I N 1 _ D 3 H
I N 2 _ 6 4 H
I N 3 _ D 2 H
I N H _ 6 4 H
D R H _ C 8 H
P L E _ 1 B H
R C E _ 4 2 H
E L T _ 7 6 H
S L T _ 4 3 H
S P M _ 0 0 H
M S L _ 0 0 H
U S 0 _ 0 0 H
U S 1 _ 0 0 H
U S 2 _ 0 0 H
Item display Set values
F G _ _ B 0 H
F F 1 _ 7 0 H
F F 2 _ E 8 H
F Z H _ E D H
F L n _ 0 A H
D J G _ 1 4 H
F L V _ 3 3 H
W T f _ 2 0 H
F S S _ E 9 H
Fucus setting
Tracking settingItem display Set values
T G _ _ 4 8 H
T F 1 _ 7 0 H
T F 2 _ E 0 H
T F S _ 0 0 H
T B o _ 4 4 H
T B t _ 2 0 H
T K o _ 4 4 H
T K t _ 1 D H
T D o _ 6 7 H
T D t _ 3 4 H
T G R _ 0 0 H
S C t _ 4 0 H
S C m _ 5 3 H
C L p _ 1 8 H
C L r _ 2 8 H
J P I _ 0 1 H
K 1 0 _ 6 5 H
Item display Set values
S P G _ 1 4 H
S P i _ E 0 H
S P m _ A 0 H
S P o _ 6 8 H
S P 1 _ 1 0 H
S P 2 _ 6 0 H
S P 3 _ F 2 H
S P 4 _ F 2 H
S P 5 _ 1 0 H
S P D _ 7 F H
S P K _ E B H
Spindle setting
MD-MT20/20C/20W
– 17 –
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ove
Slid
e in
tern
al
perip
hery
mov
e
Tse
t Mod
e M
enu
Tes
t Mod
e C
hang
e C
hart
A U
T O
1
A U
T O
2SK
IP U
PSK
IP D
OWN
SKIP
DOW
N
SKIP
UP
SKIP
DOW
N
SKIP
UP
SKIP
DOW
N
SKIP
UP
SKIP
DOW
N
SKIP
UP
SKIP
DOW
N
T
R E
C
SKIP
UP
SKIP
DOW
N
: Con
tinuo
us p
layb
ack
men
u
T
P L
A Y
SKIP
UP
SKIP
DOW
N
SKIP
UP
SKIP
DOW
N
SKIP
UP
SKIP
DOW
N
: Dig
ital i
nput
sig
nal m
onito
r m
enu
D i
n M
o n
SKIP
UP
SKIP
DOW
N
E E
P R
O M
SKIP
UP
SKIP
DOW
N
I N N
E R
SK
IP U
P
SKIP
UP
SKIP
DOW
N
SKIP
DOW
NSK
IP U
P
* W
hen
the
[ST
OP
] but
ton
is p
ress
ed in
spe
cific
men
u, th
e "T
ES
T M
OD
E S
TO
P"
stat
e is
set
.*
Whe
n th
e [P
LAY
] but
ton
oper
atio
n is
per
form
ed in
the
spec
ific
men
u, th
e op
erat
ion
of th
is m
enu
is e
xecu
ted.
: Pre
-adj
ustm
ent v
alue
che
ck m
enu
R S
L T
1
: AT
T a
djus
tmen
t val
ue c
heck
men
u
R S
L T
2
: Pre
-man
ual a
djus
tmen
t men
u
M A
N U
1
: AT
T m
anua
l adj
ustm
ent m
enu
M A
N U
2
: Err
or h
isto
ry d
ispl
ay m
enu
E
D A
T A
: Tes
t mod
e no
rmal
pla
ybac
k m
enu
N O
R M
A L
: Pre
auto
mat
ic A
djus
tmen
t men
u
: Pre
adju
stm
ent e
rror
(ad
just
men
t val
ue o
utpu
t)
: Dur
ing
prea
djus
tmen
t adj
ustm
ent
Adj
ustm
ent e
rror
Nor
mal
end
: Pre
adju
stm
ent n
orm
al e
nd (
adju
stm
ent v
alue
out
put)
: Dur
ing
AT
T a
utom
atic
adj
ustm
ent
PLA
Y
PLA
Y
A U
T O
1
Pre
auto
mat
ic A
djus
tmen
t
A D
J .
O K
A D
J .
N G
A T
2
A T
1
* W
hen
the
[ST
OP
] but
ton
is p
ress
ed in
spe
cific
men
u, th
e "T
ES
T M
OD
E S
TO
P"
stat
e is
set
.*
"
"
repr
esen
t the
adj
ustm
ent n
umbe
r as
follo
ws.
0 0
: Inn
erm
ost p
erip
hery
mov
e0
2 : A
BE
F o
ffset
tent
ativ
e m
easu
rem
ent
0 4
: RF
sid
e fo
cus
gain
coa
rse
adju
stm
ent
0 5
: Foc
us A
TT
tent
ativ
e se
tting
0 6
: RF
sid
e bi
t sec
tion
trac
king
gai
n ad
just
men
t0
7 : C
OU
T le
vel s
ettin
g fo
r pi
t sec
tion
adju
stm
ent
0 8
: Ext
erna
l per
iphe
ry m
ove
0 9
: RF
sid
e gr
oove
sec
tion
trac
king
gai
n ad
just
men
t1
0 : C
OU
T le
vel s
ettin
g fo
r gr
oove
sec
tion
adju
stm
ent
1 1
: RF
sid
e T
CR
S g
ain
adju
stm
ent
1 2
: Tra
ckin
g A
TT
initi
al s
ettin
g1
3 : R
F s
ide
focu
s ga
in m
inor
adj
ustm
ent
1 4
: Foc
us A
TT
initi
al s
ettin
g1
5 : S
gai
n "H
igh"
AB
EF
offs
et m
easu
rem
ent
1 6
: TC
RS
offs
et m
easu
rem
ent
1 7
: S g
ain
"Low
" A
BE
F o
ffset
mea
sure
men
t
MD-MT20/20C/20W
– 18 –
: AT
T A
utoa
djus
tmen
t men
u
: AT
T a
djus
tmen
t err
or (
adju
stm
ent v
alue
out
put)
: Dur
ing
AT
T a
utoa
djus
tmen
t
Adj
ustm
ent e
rror
Nor
mal
end
: AT
T a
djus
tmen
t nor
mal
end
(ad
just
men
t val
ue o
utpu
t)
: Con
tinuo
us p
layb
ack
(hig
h re
flect
ion)
: Con
tinuo
us p
layb
ack
(low
ref
lect
ion)
PLA
Y
PLA
Y
A U
T O
2
AT
T A
uto
Adj
ustm
ent
A D
J .
O K
A D
J .
N G
S Q
# #
# #
A P
# #
# #
A T
2
* W
hen
the
[ST
OP
] but
ton
is p
ress
ed in
spe
cific
men
u, th
e "T
ES
T M
OD
E S
TO
P"
stat
e is
set
.*
"
" r
epre
sent
the
adju
stm
ent n
umbe
r as
follo
ws.
0 0
: Inn
erm
ost p
erip
hery
mov
e0
3 : P
it se
ctio
n tr
acki
ng A
TT
set
ting
0 4
: Pit
sect
ion
focu
s A
TT
set
ting
0 6
: Ext
erna
l per
iphe
ry m
ove
(low
ref
lect
ion
only
)0
7 : T
CR
S A
TT
set
ting
(low
ref
lect
ion
only
)0
8 : G
roov
e se
ctio
n tr
acki
ng A
TT
set
ting
(low
ref
lect
ion
only
)0
9 : G
roov
e se
ctio
n fo
cus
AT
T s
ettin
g(lo
w r
efle
ctio
n on
ly)
: Con
tinuo
us p
layb
ack
men
u
: Con
tinuo
us p
layb
ack
(pit
sect
ion)
: Con
tinuo
us p
layb
ack
(gro
ove
sect
ion)
# #
# #
: Add
ress
: Con
tinuo
us p
layb
ack
(pit
sect
ion)
: Con
tinuo
us p
layb
ack
(gro
ove
sect
ion)
# #
# #
: Add
ress
PLA
Y
T
P
L A
Y
Con
tinuo
us P
layb
ack
S Q
# #
# #
A P
# #
# #
* W
hen
the
[ST
OP
] but
ton
is p
ress
ed in
spe
cific
men
u, th
e "T
ES
T M
OD
E S
TO
P"
stat
e is
set
.*
In th
e st
art a
ddre
ss s
et s
tate
the
star
t add
ress
cha
nges
as
follo
ws
whe
n th
e [D
ISP
] but
ton
is p
ress
ed.
0 0
3 2
H (
initi
al v
alue
)0
3 C
0 H
0 7
0 0
H0
8 A
0 H
A d
0 0
3 2
A d
0 3
C 0
DISP
DISP
A d
0 7
0 0
DISP
DISP
A d
0 8
A 0
* In
the
star
t add
ress
set
ting
stat
e th
e st
art a
ddre
ss c
hang
e di
git c
hang
es w
hen
the
[BA
SS
] but
ton
is p
ress
ed.
1st
dig
it (in
itial
val
ue)
2nd
digi
t3r
d di
git
A d
0 0
3 2
A d
0 0
3 2
MO
DE
MO
DE
A d
0 0
3 2
MO
DE
* In
the
cont
inuo
us p
layb
ack
stat
e th
e nu
mbe
r of
jum
p lin
es c
hang
es a
s fo
llow
s sh
own
the
[BA
SS
] but
ton
is p
ress
ed.
1 (in
itial
val
ue)
1038
4
1 T
R
1 0
T R
BASS
BASS
3 8
4 T
RBA
SS
• C
ontin
uous
pla
ybac
k fr
om c
urre
nt p
icku
p po
sitio
n
: Con
tinuo
us p
layb
ack
men
u
: Sta
rt a
ddre
ss s
ettin
g
DIS
P
T
P
L A
Y
A d
0 0
3 2
PLA
Y
S Q
# #
# #
A P
# #
# #
• C
ontin
uous
pla
ybac
k fr
om a
ny a
ddre
ss
* In
the
star
t add
ress
set
sta
te th
e va
lue
of s
elec
tion
digi
t cha
nges
in th
e ra
nge
of "
0h to
Fh"
w
hen
the
[SK
IP U
P/D
OW
N] b
utto
n is
pre
ssed
* W
hen
the
[SK
IP U
P] b
utto
n is
pre
ssed
in th
e co
ntin
ued
play
back
mod
e, ju
mp
of s
peci
fied
num
ber
of li
nes
occu
rs in
the
exte
rnal
per
iphe
ry d
irect
ion.
If t
he k
ey is
hel
d do
wn
jum
p oc
curs
con
tinuo
usly
(10
0 m
s cy
cle)
.*
Whe
n th
e [S
KIP
DO
WN
] but
ton
is p
ress
ed in
the
cont
inuo
us p
layb
ack
mod
e, ju
mp
of s
peci
fied
num
ber
of li
nes
occu
rs in
the
inte
rnal
per
iphe
ry d
irect
ion.
If t
he k
ey is
hel
d do
wn,
jum
p oc
curs
con
tinuo
usly
(10
0 m
s cy
cle)
. A d
1 9
5 0
H
0 9
5 0
H
MD-MT20/20C/20W
– 19 –
: Con
tinuo
us r
ecor
d m
enu
PLA
Y
T
R E
C
Con
tinuo
us R
reco
rd
A P
# #
# #
* W
hen
the
[ST
OP
] but
ton
is p
ress
ed in
spe
cific
men
u, th
e "T
ES
T M
OD
E S
TO
P"
stat
e is
set
.*
In th
e st
art a
ddre
ss s
et s
tate
the
star
t add
ress
cha
nges
as
follo
ws
whe
n th
e [D
ISP
] but
ton
is p
ress
ed.
• C
ontin
uous
rec
ord
from
the
curr
ent p
icku
p po
sitio
n
: Con
tinuo
us r
ecor
d m
enu
: Sta
rt a
ddre
ss s
ettin
g
: Con
tinuo
us r
ecor
d #
# #
#: A
ddre
ss
: Con
tinuo
us r
ecor
d #
# #
#: A
ddre
ss
PLA
Y
T
R E
C
A d
0 0
3 2
PLA
Y
A P
# #
# #
• C
ontin
uous
rec
ord
play
back
from
any
add
ress
A d
0 0
3 2
0
0 3
2 H
(in
itial
val
ue)
0 3
C 0
H0
7 0
0 H
0 8
A 0
H
A d
0 3
c 0
DISP
A d
0 7
0 0
DISP
DISP
DISPA
d 0
8 A
0
* In
the
star
t add
ress
set
ting
stat
e th
e st
art a
ddre
ss c
hang
e di
git c
hang
es w
hen
the
[BA
SS
] but
ton
is p
ress
ed.
A d
0 0
3 2
1st d
igit
(initi
al v
alue
)2n
d di
git
3rd
digi
t
A d
0 0
3 2
MOD
EA
d 0
0 3
2M
ODE
MOD
E
A d
1 9
5 0
: IN
NE
R s
witc
h po
sitio
n m
easu
rem
ent m
enu
: Con
tinuo
us p
layb
ack
(pit
sect
ion)
# #
# #
: Add
ress
PLA
Y
I N
N E
R
Inne
r S
witc
h P
ositi
on M
easu
rem
ent
S Q
# #
# #
* W
hen
the
[ST
OP
] but
ton
is p
ress
ed in
spe
cific
men
u, th
e "T
ES
T M
OD
E S
TO
P"
stat
e is
set
.
: TE
ST
mod
e no
rmal
pla
ybac
k m
enu
: Con
tinuo
us p
layb
ack
@@
@@
@@
: Mod
e an
d ad
dres
s di
spla
y
PLA
Y
N O
R M
A L
Tes
t Mod
e N
orm
al P
layb
ack
@@
@@
@@
* W
hen
the
[ST
OP
] but
ton
is p
ress
ed in
spe
cific
men
u, th
e "T
ES
T M
OD
E S
TO
P"
stat
e is
set
.*
Whe
n th
e N
OR
MA
L m
ode
is c
ance
led,
the
pow
er is
turn
ed o
ff.
: Err
or h
isto
ry d
ispl
ay m
enu
: Err
or h
isto
ry 0
dis
play
§ §
: Err
or c
ode
: Err
or h
isto
ry 1
dis
play
§ §
: Err
or c
ode
: Err
or h
isto
ry 2
dis
play
§ §
: Err
or c
ode
: Err
or h
isto
ry 3
dis
play
§ §
: Err
or c
ode
: Err
or h
isto
ry 4
dis
play
§ §
: Err
or c
ode
: Err
or h
isto
ry 5
dis
play
§ §
: Err
or c
ode
: Err
or h
isto
ry 6
dis
play
§ §
: Err
or c
ode
: Err
or h
isto
ry 7
dis
play
§ §
: Err
or c
ode
: Err
or h
isto
ry 8
dis
play
§ §
: Err
or c
ode
: Err
or h
isto
ry 9
dis
play
§ §
: Err
or c
ode
PLA
Y
E
D A
T A
Err
or H
isto
ry D
ispl
ay
E 0
§ §
E 1
§ §
: Err
or h
isto
ry d
ispl
ay m
enu
: Err
or h
isto
ry c
lear
PLA
Y
E
D A
T A
C L
E A
R
SKIP
UP
SKIP
DOW
N
E 2
§ §
SKIP
UP
SKIP
DOW
N
E 3
§ §
SKIP
UP
SKIP
DOW
N
E 4
§ §
SKIP
UP
SKIP
DOW
N
E 5
§ §
SKIP
UP
SKIP
DOW
N
E 6
§ §
SKIP
UP
SKIP
DOW
N
E 7
§ §
SKIP
UP
SKIP
DOW
N
E 8
§ §
SKIP
UP
SKIP
DOW
N
E 9
§ §
SKIP
UP
SKIP
DOW
N
• E
rror
his
tory
cle
ar
• E
rror
his
tory
dis
play
* W
hen
the
[ST
OP
] but
ton
is p
ress
ed in
spe
cific
men
u, th
e "T
ES
T M
OD
E S
TO
P"
stat
e is
set
.
MD-MT20/20C/20W
– 20 –
: EE
PR
OM
set
ting
men
u
: Foc
us s
ettin
g m
enu
: Spi
n se
tting
men
u
: Tra
ckin
g se
tting
men
u
: Sle
d se
tting
men
u
: BA
SS
set
ting
men
u
: TE
MP
set
ting
men
u
: Adj
ustm
ent s
ettin
g m
enu
: Dig
ital E
Q s
ettin
g m
enu
: Con
trol
set
ting
men
u
PLA
Y
E E
P R
O M
EE
PR
OM
Set
ting
F o
c u
s
S p
i n
SKIP
UP
SKIP
DOW
N
T r
a c
kSK
IP U
PSK
IP D
OWN
S l
e d
SKIP
UP
SKIP
DOW
N
B a
s s
SKIP
UP
SKIP
DOW
N
T E
M P
SKIP
UP
SKIP
DOW
N
A D
J S
E T
SKIP
UP
SKIP
DOW
N
D E
Q S
E T
SKIP
UP
SKIP
DOW
N
C T
R L
SKIP
UP
SKIP
DOW
NSK
IP U
P
SKIP
DOW
N
* W
hen
the
[ST
OP
] but
ton
is p
ress
ed in
spe
cific
men
u, th
e "T
ES
T M
OD
E S
TO
P"
stat
e is
set
.*
Whe
n th
e [P
LAY
] but
ton
oper
atio
n is
per
form
ed in
the
spec
ific
stat
e, th
e sp
ecifi
c se
tting
men
u is
set
.
: BA
SS
set
ting
men
u
PLA
Y
B a
s s
BA
SS
Set
ting
B S
1
B S
2SK
IP U
PSK
IP D
OWN
B S
3SK
IP U
PSK
IP D
OWN
* W
hen
the
[ST
OP
] but
ton
is p
ress
ed in
spe
cific
men
u, th
e "T
ES
T M
OD
E S
TO
P"
stat
e is
set
.*
Whe
n th
e [D
ISP
] but
ton
oper
atio
n is
per
form
ed in
the
spec
ific
stat
e, th
e m
enu
chan
ges
to
"T
EM
P S
ET
TIN
G m
enu"
.*
In th
e sp
ecifi
c st
ate
the
setti
ng c
hang
es in
the
rang
e of
"00
h to
FF
h" w
hen
the
[V
OL
UP
/DO
WN
] but
ton
is p
ress
ed.
(T
he u
pper
lim
it va
ries
depe
ndin
g on
the
item
s)*
Whe
n th
e [M
OD
E] b
utto
n is
pre
ssed
in e
ach
stat
e, th
e se
t dig
it is
cha
nged
.
: Foc
us s
ettin
g m
enu
PLA
Y
F o
c u
s
Foc
us S
ettin
g
F G
F F
1SK
IP U
PSK
IP D
OWN
F F
2SK
IP U
PSK
IP D
OWN
F Z
HSK
IP U
PSK
IP D
OWN
F L
nSK
IP U
PSK
IP D
OWN
D J
GSK
IP U
PSK
IP D
OWN
SKIP
UP
SKIP
DOW
N
F L
V
W T
fSK
IP U
PSK
IP D
OWN
* W
hen
the
[ST
OP
] but
ton
is p
ress
ed in
spe
cific
men
u, th
e "T
ES
T M
OD
E S
TO
P"
stat
e is
set
.*
Whe
n th
e [D
ISP
] but
ton
oper
atio
n is
per
form
ed in
the
spec
ific
stat
e, th
e m
enu
chan
ges
to "
TE
MP
SE
TT
ING
men
u".
* In
spe
cific
sta
te th
e se
tting
cha
nged
in th
e ra
nge
of "
00h
to F
Fh"
whe
n th
e [V
OL
UP
/DO
WN
] but
ton
is p
ress
ed.
(T
he u
pper
lim
it va
ries
depe
ndin
g on
the
item
s)*
Whe
n th
e [M
OD
E] b
utto
n is
pre
ssed
in e
ach
stat
e, th
e se
t dig
it is
cha
nged
.
F S
SSK
IP U
PSK
IP D
OWN
MD-MT20/20C/20W
– 21 –
: Spi
n se
tting
men
u
PLA
Y
S p
i n
Spi
n S
ettin
g
S P
G
S P
iSK
IP U
PSK
IP D
OWN
S P
mSK
IP U
PSK
IP D
OWN
S P
oSK
IP U
PSK
IP D
OWN
S P
1SK
IP U
PSK
IP D
OWN
S P
2SK
IP U
PSK
IP D
OWN
S P
3SK
IP U
PSK
IP D
OWN
S P
4SK
IP U
PSK
IP D
OWN
S P
5SK
IP U
PSK
IP D
OWN
S P
DSK
IP U
PSK
IP D
OWN
* W
hen
the
[ST
OP
] but
ton
is p
ress
ed in
spe
cific
men
u, th
e "T
ES
T M
OD
E S
TO
P"
stat
e is
set
.*
Whe
n th
e [D
ISP
] but
ton
oper
atio
n is
per
form
ed in
the
spec
ific
stat
e, th
e m
enu
chan
ges
to "
TE
MP
SE
TT
ING
men
u".
* In
spe
cific
sta
te th
e se
tting
cha
nged
in th
e ra
nge
of "
00h
to F
Fh"
whe
n th
e [
VO
L U
P/D
OW
N] b
utto
n is
pre
ssed
. (
The
upp
er li
mit
varie
s de
pend
ing
on th
e ite
ms)
S P
KSK
IP U
PSK
IP D
OWN
* W
hen
the
[MO
DE
] but
ton
is p
ress
ed in
eac
h st
ate,
the
set d
igit
is c
hang
ed.
: Tra
ckin
g se
tting
men
u
PLA
Y
T r
a c
k
Tra
ckin
g S
ettin
g
T G
T F
1SK
IP U
PSK
IP D
OWN
T F
2SK
IP U
PSK
IP D
OWN
T F
SSK
IP U
PSK
IP D
OWN
T B
oSK
IP U
PSK
IP D
OWN
T B
tSK
IP U
PSK
IP D
OWN
T K
oSK
IP U
PSK
IP D
OWN
T K
tSK
IP U
PSK
IP D
OWN
T D
oSK
IP U
PSK
IP D
OWN
T D
tSK
IP U
PSK
IP D
OWN
* W
hen
the
[ST
OP
] but
ton
is p
ress
ed in
spe
cific
men
u, th
e "T
ES
T M
OD
E S
TO
P"
stat
e is
set
.*
Whe
n th
e [D
ISP
] but
ton
oper
atio
n is
per
form
ed in
the
spec
ific
stat
e, th
e m
enu
chan
ges
to "
TE
MP
SE
TT
ING
men
u".
* In
the
spec
ific
stat
e th
e se
tting
cha
nges
in th
e ra
nge
of "
00h
to F
Fh"
whe
n th
e [V
OL
UP
/DO
WN
] b
utto
n is
pre
ssed
. (T
he u
pper
lim
it va
ries
depe
ndin
g on
the
item
s)
T G
RSK
IP U
PSK
IP D
OWN
S C
tSK
IP U
PSK
IP D
OWN
S C
mSK
IP U
PSK
IP D
OWN
C L
pSK
IP U
PSK
IP D
OWN
C L
rSK
IP U
PSK
IP D
OWN
J P
ISK
IP U
PSK
IP D
OWN
K 1
0SK
IP U
PSK
IP D
OWN
* W
hen
the
[MO
DE
] but
ton
is p
ress
ed in
eac
h st
ate,
the
set d
igit
is c
hang
ed.
MD-MT20/20C/20W
– 22 –
: Slid
e se
tting
men
u
PLA
Y
S l
e d
Sle
d S
ettin
g
S L
G
S L
2SK
IP U
PSK
IP D
OWN
S L
MSK
IP U
PSK
IP D
OWN
S L
VSK
IP U
PSK
IP D
OWN
S K
kSK
IP U
PSK
IP D
OWN
S K
tSK
IP U
PSK
IP D
OWN
S K
mSK
IP U
PSK
IP D
OWN
* W
hen
the
[ST
OP
] but
ton
is p
ress
ed in
spe
cific
men
u, th
e "T
ES
T M
OD
E S
TO
P"
stat
e is
set
.*
Whe
n th
e [D
ISP
] but
ton
oper
atio
n is
per
form
ed in
the
spec
ific
stat
e, th
e m
enu
chan
ges
to "
TE
MP
SE
TT
ING
men
u".
* In
the
spec
ific
stat
e th
e se
tting
cha
nges
in th
e ra
nge
of "
00h
to F
Fh"
whe
n th
e [
VO
L U
P/D
OW
N] b
utto
n is
pre
ssed
. (
The
upp
er li
mit
varie
s de
pend
ing
on th
e ite
ms)
* W
hen
the
[MO
DE
] but
ton
is p
ress
ed in
eac
h st
ate,
the
set d
igit
is c
hang
ed.
W T
mSK
IP U
PSK
IP D
OWN
M V
1SK
IP U
PSK
IP D
OWN
M V
2SK
IP U
PSK
IP D
OWN
S R
VSK
IP U
PSK
IP D
OWN
: Tem
p se
tting
men
u
: TE
MP
ref
eren
ce : Ref
eren
ce
§ §
: T
empe
ratu
re c
ode
: TE
MP
A/D
inpu
t val
ue: M
easu
rem
ent v
alue
PLA
Y
T e
m p
TE
MP
Set
ting
T M
§ §
T p
i n
SKIP
UP
SKIP
DOW
N
* W
hen
the
[ST
OP
] but
ton
is p
ress
ed in
spe
cific
men
u, th
e "T
ES
T M
OD
E S
TO
P"
stat
e is
set
.*
Whe
n th
e [D
ISP
] but
ton
oper
atio
n is
per
form
ed in
the
spec
ific
stat
e, th
e m
enu
chan
ges
to "
TE
MP
SE
TT
ING
men
u".
* In
the
spec
ific
stat
e th
e se
tting
cha
nges
in th
e ra
nge
of "
00h
to F
Fh"
whe
n th
e [
VO
L U
P/D
OW
N] b
utto
n is
pre
ssed
.*
Whe
n th
e [M
OD
E] b
utto
n is
pre
ssed
in e
ach
stat
e, th
e se
t dig
it is
cha
nged
.
: Adj
ustm
ent s
ettin
g m
enu
PLA
Y
A D
J S
E T
Adj
ustm
ent S
ettin
g
C O
K
F A
TSK
IP U
PSK
IP D
OWN
T A
TSK
IP U
PSK
IP D
OWN
C A
TSK
IP U
PSK
IP D
OWN
F A
BSK
IP U
PSK
IP D
OWN
* W
hen
the
[ST
OP
] but
ton
is p
ress
ed in
spe
cific
men
u, th
e "T
ES
T M
OD
E S
TO
P"
stat
e is
set
.*
Whe
n th
e [D
ISP
] but
ton
oper
atio
n is
per
form
ed in
the
spec
ific
stat
e, th
e m
enu
chan
ges
to "
TE
MP
SE
TT
ING
men
u".
* In
the
spec
ific
setti
ng d
ispl
ay s
tate
the
setti
ng c
hang
e di
git c
hang
es w
hen
the
[P-M
OD
E]
but
ton
is p
ress
ed.
1st d
igit
(initi
al v
alue
)2n
d di
git
P-M
ODE
P-M
ODE
* In
the
spec
ific
stat
e th
e se
tting
cha
nges
in th
e ra
nge
of "
0h to
Fh"
whe
n th
e [V
OL
UP
/DO
WN
] b
utto
n is
pre
ssed
.*
Whe
n th
e [M
OD
E] b
utto
n is
pre
ssed
in e
ach
stat
e, th
e se
t dig
it is
cha
nged
.
MD-MT20/20C/20W
– 23 –
: Dig
ital E
Q s
ettin
g m
enu
PLA
Y
D E
Q S
E T
Dig
ital E
Q S
ettin
g
H Q
1
H Q
2SK
IP U
PSK
IP D
OWN
H S
GSK
IP U
PSK
IP D
OWN
H S
OSK
IP U
PSK
IP D
OWN
L Q
1SK
IP U
PSK
IP D
OWN
L Q
2SK
IP U
PSK
IP D
OWN
L S
GSK
IP U
PSK
IP D
OWN
L S
OSK
IP U
PSK
IP D
OWN
G Q
1SK
IP U
PSK
IP D
OWN
F L
pSK
IP U
PSK
IP D
OWN
G Q
2SK
IP U
PSK
IP D
OWN
G S
GSK
IP U
PSK
IP D
OWN
* W
hen
the
[ST
OP
] but
ton
is p
ress
ed in
spe
cific
men
u, th
e "T
ES
T M
OD
E S
TO
P"
stat
e is
set
.*
Whe
n th
e [D
ISP
] but
ton
oper
atio
n is
per
form
ed in
the
spec
ific
stat
e, th
e m
enu
chan
ges
to "
TE
MP
SE
TT
ING
men
u".
* In
the
spec
ific
setti
ng d
ispl
ay s
tate
the
setti
ng c
hang
e di
git c
hang
es
w
hen
the
[P-M
OD
E] b
utto
n is
pre
ssed
. 1
st d
igit
(initi
al v
alue
)
2nd
dig
itP-
MO
DE
P-M
ODE
* In
the
spec
ific
stat
e th
e se
tting
cha
nges
in th
e ra
nge
of "
0h to
Fh"
whe
n th
e [V
OL
UP
/DO
WN
] b
utto
n is
pre
ssed
.*
Whe
n th
e [M
OD
E] b
utto
n is
pre
ssed
in e
ach
stat
e, th
e se
t dig
it is
cha
nged
.
: Con
trol
set
ting
men
u
PLA
Y
C T
R L
Con
trol
Set
ting
C T
0
C T
1SK
IP U
PSK
IP D
OWN
C T
2SK
IP U
PSK
IP D
OWN
C T
3SK
IP U
PSK
IP D
OWN
R C
0SK
IP U
PSK
IP D
OWN
R C
1SK
IP U
PSK
IP D
OWN
S Y
CSK
IP U
PSK
IP D
OWN
P W
LSK
IP U
PSK
IP D
OWN
D R
1SK
IP U
PSK
IP D
OWN
D R
2SK
IP U
PSK
IP D
OWN
I N
1SK
IP U
PSK
IP D
OWN
I N
2SK
IP U
PSK
IP D
OWN
I N
3SK
IP U
PSK
IP D
OWN
I N
HSK
IP U
PSK
IP D
OWN
Con
tinue
d to
th
e ne
xt p
age
SKIP
UP
SKIP
DOW
N
MD-MT20/20C/20W
– 24 –
Con
tinue
d fr
om
the
prec
edin
g pa
ge
D R
HSK
IP U
PSK
IP D
OWN
P L
ESK
IP U
PSK
IP D
OWN
SKIP
UP
SKIP
DOW
N
SKIP
UP
SKIP
DOW
N
R C
E
E L
T
S L
TSK
IP U
PSK
IP D
OWN
S P
MSK
IP U
PSK
IP D
OWN
SKIP
UP
SKIP
DOW
N
SKIP
UP
SKIP
DOW
N
M S
L
U S
0SK
IP U
PSK
IP D
OWN
SKIP
UP
SKIP
DOW
N
U S
1
U S
2*
Whe
n th
e [S
TO
P] b
utto
n is
pre
ssed
in s
peci
fic m
enu,
the
"TE
ST
MO
DE
ST
OP
" st
ate
is s
et.
* W
hen
the
[DIS
P] b
utto
n op
erat
ion
is p
erfo
rmed
in th
e sp
ecifi
c st
ate,
the
men
u ch
ange
s to
"T
EM
P S
ET
TIN
G m
enu"
.*
In th
e sp
ecifi
c se
tting
dis
play
sta
te th
e se
tting
cha
nge
digi
t cha
nges
whe
n th
e [P
-MO
DE
] b
utto
n is
pre
ssed
.1s
t dig
it (in
itial
val
ue)
2nd
digi
tP-
MO
DE
P-M
ODE
* In
the
spec
ific
stat
e th
e se
tting
cha
nges
in th
e ra
nge
of "
0h to
Fh"
whe
n th
e [
VO
L U
P/D
OW
N] b
utto
n is
pre
ssed
.*
Whe
n th
e [M
OD
E] b
utto
n is
pre
ssed
in e
ach
stat
e, th
e se
t dig
it is
cha
nged
.
MD-MT20/20C/20W
– 25 –
SW401 EJECT OFF—ON
SW402 HOLD OFF—ON
SW403 DISC LID OPEN OFF—ON
SW902 DISC PROTECT OFF—ON
NOTES ON SCHEMATIC DIAGRAM
• Resistor:To differentiate the units of resistors, such symbol as K andM are used: the symbol K means 1000 ohm and the symbolM means 1000 kohm and the resistor without any symbol isohm-type resistor. Besides, the one with “Fusible” is a fusetype.
• Capacitor:To indicate the unit of capacitor, a symbol P is used: thissymbol P means micro-micro-farad and the unit of thecapacitor without such a symbol is microfarad. As to electro-lytic capacitor, the expression “capacitance/withstand volt-age” is used.(CH), (TH), (RH), (UJ): Temperature compensation(ML): Mylar type
• The indicated voltage in each section is the one measuredby Digital Multimeter between such a section and the chas-sis with no signal given.
• Parts marked with “ ” ( ) are important formaintaining the safety of the set. Be sure to replace theseparts with specified ones for maintaining the safety andperformance of the set.
• The numbers 1 to 18 are waveform numbers shown in page 36.
: Through-hole where the top, bottom and +B patterns are connected. : Through-hole where the top, bottom and hround patterns are connected. : Through-hole where the top and bottom patterns are connected.
A
B
C
D
E
F
G
H
1 2 3 4 5 6
Figure 32 WIRING OF P.W.BOARD (2/5)
TP
106
TP
205
TP
110
TP
105
C11
0
C10
9
C10
6
C11
1
TP
100
TP
102
TP
101
CK
112
C11
2TP
139
TP
108
C107
TP
114
TP
200
IC202
TP
404
TP
109
R10
6
TP
144
TP
115
CK
105
IC101 TP
203
TP
402
CN101
TP
111
TP
103
TP
145
TP
791
TP
132
TP
406
TP
415
TP
118
CK
107
TP
116
R40
6
TP
418
TP
809
TP
117
TP
131
TP
206
CK
108
TP
405
TP
808
TP
787
TP
414
TP
133
CK
106
R405
CK102
CK103
TP
207 CK101
C401
TP
130
CK
104 T
P41
1 TP
122
TP
151
Q101 TP
121
C130
TP
119
TP
120
R154
IC402 TP
351
C161
TP
408
IC401
TP
201
TP
409
R908
R90
6
C903
R907
TP407
R905
C908
C902
R909R413 C910
IC351 R903
TP
901
R415 R411C909
TP
413
IC901
R414
R412
C906
TP
659
TP
658
TP
452
TP
187
TP
662
C357
TP
601
C81
0
R902C907
R81
0
R81
1
TP
651
TP
663
TP
410
TP
416
TP
417
C911
TP
652
TP
785
R901R904
TP
655
L921
TP
602
TP
654
TP
811
C82
5
R827
R83
2
R921
TP
653
R452
TP
401
TP
610
R422R922
R85
3
TP
656
TP
489
R828
C82
2
R82
3
R82
6C
830
R829R82
1
L601
C601
R85
1
C85
1
R85
2
D83
1
TP
488
TP
657
CN601 TP
661
TP
486 IC
851
C83
2
C83
1
L602
C85
2C
828 TP
660
IC821
C602
TP
463
TP
664
TP
665
TP
666
L603
C603
C48
2
C481
C82
4
C60
4 IC80
8
C829
R279
TP
481
TP
482
D822
L604
IC807 R831R824
R26
5
R27
3
Q25
4
Q25
1
R26
3
C823R277
C250R264
R253
R252
R27
8
R276
R25
9
R26
0
Q25
3
R261
TP
804
C253Q25
5
R27
5
R26
6
R262R254
R27
1
R27
4
R26
7
R255
C258
C25
6
IC805
C25
4
C25
5
R269
TP
803
R804
TP
483
TP
454
R456
TP
453
R457
TP
451
R455
TP
456
TP
458
CN482 CN451
R424
TP
460
R426TP
461
R425 R453TP
457
TP
805
R451
L888
TP487
R81
5
R81
6
C800
TP462
TP
801
TP
800
C80
1 TP
802
L887
TP
209
TP
210
TP
455
TP
208
TP403 TP400
TP
761
TP
763
TP764
TP
459
TP
765
TP
204
XL401
TP
767
TP
202
TP
768
TP
779
TP
774
TP
769
TP
775
TP
786
TP
770
CN701
TP
788
TP
782
TP
771
TP
777
TP
780
TP
790
TP
412
TP
792
TP
783
TP
793
TP
789
TP
212
R458
6 431
4 6
3 1
1615
10
5
1
14
8
1
5
7
10
14
5 8
C905
1
5
10 11
15
20
712 10
1 5 6
1
5
10
13
1
5
9
33
30
25
20
15
10
5
1
1 2 3 4 5 6 7 8 9 10
20 19 18 17 16 15 14 13 12 11
SW402HOLD
3736
35
30
25 24 20 1512
13
10
5
1
48
4540
22
1
5
10
15
20
1
23
To Key Switch Flexible Ass'yP31 2-E
To LCD Ass'yP31 5-E
Terminal, Battery(237) /
13 1 9 1
5 4
1 3
1 22 1 16
Terminal, Battery(233)
Terminal, Battery(235)
1
1
TO AUDIO PWB
CN702P34 3-A
MAIN PWB-A1 (BOTTOM VIEW)
FLAT CABLE(243)
33
33
2
1
9
13
11
17
18
10
16
14 15
26 2530
20
15
10
5
1
100
50
51
55
45 40 35
60
65
70
75 80 85 90 9576
J801
8
5
1
4
J801DC IN
To Optical Pickup UnitP31 1-D
To Mechanism Flexible PWBP31 6-D
MD-MT20/20C/20W
– 33 –
7 8 9 10 11 12
Figure 33 WIRING OF P.W.BOARD (3/5)
R27
0
R25
8
R25
7
Q25
2
R256 SW801
R250
IC806
R251
D812
IC803 R268L821 L822
C821
R600
C805
C622
C600
C651
L600
C605C609 L609
C610
C826 C863
C834 R833
L862
C86
5
C86
9
C806
IC60
1
IC822 C608L610
D82
1
C827 D861
L608
C431
C20
4
IC431
D431R20
4
C20
3
Q873R431
Q874
IC651
CK202
CK201
CK206 CK
205
CK
203
CK
204
R601R878
Q901
C361
L171
R466
C20
7C12
4
C12
2
R920R104R361
R102
IC35
3
C12
3
C12
1
C351 R103
IC35
4
D351R101
IC201
R205
C171
R206
C354
R35
1
C205
C35
3
R161
C165
CK
224
CK
222
IC820
R105 C104
C201
R803
R40
7
R40
8
R40
4
R40
3
C10
3
C10
2
C820
IC200 C100
L100
R202
C202C20
0
R80
6
R423
L206L205
R46
2
R80
0
R80
2
XL201
D80
3
C211C212
R222L202
R80
8
L203
L209
L201
IC801
CK
207 L2
04
R20
7
C20
9
R463 R80
1
R80
7
D461
R465
D80
2
C45
4
R46
4
R461
R80
9
D80
0
R871
C871
IC872
D80
1
IC80
2
Q461
IC702 C877
C86
6
R46
7
R46
0C875
IC87
1
C84
1
C874
IC841
D87
1
F871T0.5A L 63V C876
L871
1
2
3
6
4
5
G
D
S
1
5
10
15
18 1920
25
30
3536
8 5
1 41 2 3 1 2
5 4 453
2 1
3
1
5 6
10
G
SD
3
3
3
3
2
2
2
2
1
1
1
3
3
3
2
2
2
1
1
1
1
44
5
5
4
4
4
4
4
5
5
5
6
6
1
23
4S
G
D
31
2
1
5
10
15
20
2526 30 35 40 45 50
51
55
60
65
70
757680859095
100 3
2
1
4
5
6
MAIN PWB-A1 (TOP VIEW)
SW801Ni-MH BATTERY DETECTION
12
3 4
MD-MT20/20C/20W
– 34 –Figure 34 WIRING OF P.W.BOARD (4/5)
A
B
C
D
E
F
G
H
1 2 3 4 5 6
• The numbers 1 to 18 are waveform numbers shown in page 36.
: Through-hole where the top, bottom and +B patterns are connected. : Through-hole where the top, bottom and hround patterns are connected. : Through-hole where the top and bottom patterns are connected.
IC771
R764
C50
3C
504
L500
C50
0C
774
C76
6
C50
2
R502
L771
C77
1
C510
C72
3
C511
R763
R762
R770
R769
R761
C77
3
C501
R501
C76
5
C762
C50
8
SW401EJECT
C509
IC501
R765
R76
7R
500
R76
8
L719
C757
C756
IC703
R76
6C
507
R72
6C
726
R757
R75
6C
506
C50
5
Q72
1
C719
C758
R71
0
Q71
1C
725
R72
5
R72
0R
712
C760
C759
C71
5
R717
R71
9R
711
R754
C75
3C
754
R730
R753
C755
R723
C71
1
SW403DISC LIDOPEN
C722
L702
C75
2
C721
C491
L454
L453
C712
R729
C75
1
R72
4C
720
C72
4L7
12L7
13
L703
C73
1
D49
4R
703
R72
7
L456
C70
3
R72
8R
492
C701
C702
R702
L704
R714
R716
L714
C71
4
D49
2
CN702L751L752
C761
1
5
10 15
20
24
1312
4
5
3
2
19
8
713
152024
15 10
12
3 2
14
3 2
14
33
33
33
6
J701OPTICAL/LINE IN
TO MAIN PWB
CN701P32 2-B
78 6
5
AUDIO PWB-A2 (TOP VIEW)
FLATCABLE(243)
2 1
3 4 5
1
1
1
51015202530
MD-MT20/20C/20W
– 35 –
7 8 9 10 11 12
Figure 35 WIRING OF P.W.BOARD (5/5)
R70
1
C45
2
C735
IC701
C734 C733
C77
6
L452
L711
3
4
8
7
2
1
5
6
J703REMOTECONTOL/
HEADPHONES
J702MIC
IN
1 2
24
3 4
1
5
10
1213
15
20
TP701 TP702
TP711
TP713
TP712
TP714
TP091
TP086B
TP078
TP707
TP708
TP500
TP087B
TP088B
TP087
TP085
TP079
TP090
TP075
TP088 TP083
TP084
TP709
TP074
TP070B
TP089
TP072
TP070
TP067
TP071
TP073
TP724
TP722
TP729
TP721 TP723
TP725 TP721B
TP726
TP704 TP703
TP064B
TP705
TP077 TP068 TP066
TP062
TP064 TP061
TP728
TP727 TP063
TP065
TP076
TP093
TP092
TP082
TP086 TP080 TP069
L451
R715
R713
C713
AUDIO PWB-A2 (BOTTOM VIEW)
MD-MT20/20C/20W
– 36 –
WAVEFORMS OF MD CIRCUIT
NORM:200kS / s
1994 / 12 / 15 22:54:19
=Filter= =Offset= =Record Length=Smoothiing : OFFBW : FULL
TROUBLE SHOOTINGIt is advisable to use the TEST mode (refer to Error Data Display Mode, P19) indicating the causes of troubles beforestarting repair. Causes of operation errors (up to 10 errors) are recorded as error codes. This information is usefulfor repair.
When does not functionWhen the CD section does not operate When the objective lens of the optical pickup is dirty,this section may not operate.Cleanthe objective lens,and check the playback operation.When this section does not operate even after the above step is taken,checkthe following items.Remove the cabinet and follow the troubleshooting instructions."Track skipping and/or no TOC(Table Of Contents) may be caused by build up of dust other foreign matter on the laser pickup lens.Before attempting any adjustment make certain that the lens is clean. If not, clean it as mentioned below."
Turn the power off.Gently clean the lens with a lens cleaning tissue and a small amount of isopropyl alcohol.Do not touch the lens with the bare hand.
Is the power supply turned on when the remote controlbutton or main unit button is pressed? No
Perform the check stated in item "Power is not turned onwhen the PLAY button is pressed".
Perform the check stated in item "Abnormal display".No
Yes
Does the display operate normally?
Is playback state set?
Yes
Perform the check stated in item "Playback state connot beset".No
Is audio output normal?
Yes
Perform the check stated in item "Audio playback circuit".No
Is recording/playback operation normal?
Yes
Perform the check stated in item "Recording/playbackoperation".No
• Power is not turned on when the / button ispressed.
No
NoYes
Check the periphery of remote controller and main unitheadphone terminal (J703) and IC401.
NoIs the pin 55 of IC401 in H state? (TP404)
Is operation normal when the main body button is pressed?
Check the position of Hold switch.
Is power turned on when the remote control button ispressed?
NoDoes the pin 66 of IC401 oscillate? (TP400) Replace XL401.
Yes
MD-MT20/20C/20W
– 38 –
Yes
Check whether there is defective solder joint of audio signalline between IC703 and J703No
Yes
Is audio wavefrom output from J703 pins 3 and 4.
Check the pins 5 and 6 of IC703.No
Yes
Is audio wavefrom output from IC703 pins 18 and 19.
Check IC201 pins 70 to 72, pin 74 and IC501 pins 9, 10, 11,15No
• Abnormal display
No
Yes
Are the pin 4 (VCC) and pin 5 (GND) normal?Is waveform output from IC401 pins 9,11,13?Is waveform output from CN482 pins 6 to 8?
• Playback state cannot be set
Is initialization performed normally in case of high- reflectiondisc playback?
Yes
Check between IC401 andCN482.
No
Check the periphery of IC401.
Does the playback time display advance?Yes
Position check in INNER mode
Check IC201 and IC202 connection line.
Is the lead-in photointerrupter set to OFF when the opticalpickup moves to the innermost periphery in NORMAL mode?(Is TP654 in H level?).
Check the lead-in photointerrupter, mechanical flexPWB soldering and CN601 connection.No
Ia an attempt to repeat repeatedly the TOC part performedon the low-reflection disc?
Yes
NoNo
Replace the disc.No
• Audio playback clrcult
When it has been ascertained that the address up to cluster address is normal in the TEST mode.
Yes
Is audio wavefrom output from IC501 pins 19 and 20?
Check headphones jack,and periphery of headphone.
Although the playback time display is acting., no sound is given during playback in the normal mode.
Check for pattern breakage of flexible PWB, check fordefects of display microcomputer (replace the display unit).
MD-MT20/20C/20W
– 39 –
• The spindle motor fails to run.Does the head move
NoDoes the waveform appear on the IC201 pins 24 and 25 afterTEST mode AUTO2 completion and in this state?
Check the IC201 periphery.
Yes
Does waveform appear on the IC601 pin 13?
Does waveform appear on IC901 pins 1, 19 and 20?
Replace the spindle motor.
YesNo
L608, IC201, IC901, CN601 and flex, etc. soldering check
NoReplace. IC601
Yes
• Recording/playback operation
Insert a low reflection disc, and ascertain audio output by normal playback, and then set TEST REC mode.
YesDoes the head move down, failing to start record evenwhen the continuous record mode is set after address?
Check voltage of pins 52 and 53 of IC201, pins 3, 4, 7, and 9 ofIC651, pins 1 and 2 of CN601. Check whether disc is record-inhibited.No
Does the RF waveform of TP201 appear when playback is
Does level of pins 86 of IC401 and pin 17 of IC101 changedepending on record and playback?
Is RF pattern output from IC201 pin 50?
Yes
NoCheck for soldering failure of IC201 .
NoCheck periphery of IC401 and IC101.
Check whether there is any damage in IC101, periphery oflaser diode.
Yes
Check for defects of IC351 in head drive flexible PWB,head,flexible PWB.
No
YesIs audio monitor output given in normal mode LINE INrecord?
Check waveforms of pins 9 to 12 of IC501, pins 70 to 73 ofIC201.
Is waveform obtained on IC501 pins 3 and 6?
No
YesCheck whether the pin 7 of IC501 and the pin 59 of IC201 are inH state.
No
NoDoes voltage on the IC701 pins 13 to 15 change in case ofrecord VOLUME UP/DOWN?
Is audio waveform observed on the pins 18 and 19 ofIC703?
Yes
Check whether input waveform is observed on the pins 5and 6 of IC703.
57 EXPORT5 OPTCNT Output Optical digital input circuit control 'H': Circuit operation ON
58 EXPORT6 DAPON Output D/A converter operation control output 'H': Operation ON
59 EXPORT7 ADPON Output A/D converter operation control output 'H': Operation ON
System LSI expansion output port (6th generation: LR37811)Pin No. FunctionPort Name Terminal Name Input/Output Remarks
H H Normal mode
H L No adjustment mode
L H Test mode
L L (Settings prohibited)
TEST1 Details
*1: List of TEST port settings
H H fs=32K: 'ON'
H L fs=48K: 'ON'
L H OFF
L L fs=44.1K: 'ON'
EMPH1 EMPH0 Details
*2: List of EMPH port settings
H H Brake
H L Drive UP
L H Drive DOWN
L L Output OFF
LDCNT1 LDCNT0 Details
*3: List of LDCNT port settingsTEST0
IC401 RH-iX0298AWZZ: System Microcomputer (IX0298AW) (3/3)
Charging control works as shown below.Charging is performed in the following three modes.Initial charging -> Main charging Supplementary charging -> FinishThe details are shown below.The current value is measured by voltage on both ends of R250/R251.
CIRCUIT DESCRIPTION
Initial chargingThe charging current is approx. 250 mA. The initial charging time varies depending on the battery condition. The charging time maybe more than five minutes, depending on the initial battery condition. If the battery voltage is below 2.0 V (or over 3.75 V) after twominutes, the charging mode is cancelled. When the battery voltage is over 2.0 V and less than 3.75 V after five minutes, the maincharging mode is selected.
Main chargingThe charging current is approx. 375 mA. The main charging time varies depending on the battery condition.
<Main charging stop mode>When the full-charge check is performed, the output of pin 51 is pulled H and the voltage is measured at five minute intervals (eightseparate voltage measurements should be made to get a mean voltage value for consideration). The voltage value is read 500 msecafter the output of pin 51 (battery voltage detection gain select output) is pulled H.The current reading is compared with the reading taken 30 minutes before and one of three judgements is given: Same, Higher orLower.The voltage drop is detected, and the charging is stopped.When battery voltage is over 2.8 V, a full-charge check will be performed (when it is below 2.8 V, the full-charge check will not beconducted).When the battery voltage is not over 2.8 V, the initial charging mode is not changed to the main charging mode.It may be more than five minutes before the battery voltage exceeds 2.8 V.(The initial charging time varies depending on the battery condition.)
Supplementary chargingThe supplementary charging mode (charging current: 250 A) will be engaged using the following specifications, depending on themain charging mode.After the main charging is completed, the battery is charged for about two hours at a current of 250 mA, and then the charging modeis cancelled.
MD-MT20/20C/20W
– 43 –
Battery voltage measurementWhen the battery is being used or while it is being charged, the output of pin 17 should be H (battery voltage measurement output).The output should be held L in the power-off mode and in the other modes. However, when it is necessary to measure the batteryvoltage, pull pin 17 (battery voltage measurement output) H temporarily, to make the measurement.
Charging test modeFor details about the test mode, see the separate page.
Charging circuit descriptionThe charging current value is determined by measuring the voltage across R250/R251.The charging current is controlled by IC805, Q252, IC803, the rechargeable battery, and R250/R251.The reference voltage for IC401 is output from pin 85 (DA port) and is input on pin 5 on IC805.Since the charging current is controlled by the NFB loop, the circuit is designed so that pin 5 on IC805 will have the same potentialas the voltage across R250/R251. Since R250/R251 is 0.5 ohms, the desired charging current can be obtained by varying thepotential of pin 5 on IC805.
Battery voltage measurementThe battery voltage can be measured using either of the following two modes.1) Pin 51 on IC401 Output L The output should always be L except during the following charging voltage measurement mode.2) Pin 51 on IC401 Output H
The output should be H while in the charging voltage measurement mode.Since the charging voltage is measured at intervals of five minutes while in the charging mode, the output should only be H about500 msec every 5 minutes.
Power supply changeWhen one of the power supplies is selected, the port settings are as follows:
Pin 3 Charge ON output L L
Pin 85 Charging current control output Output port L Output port H
Pin 89 Battery OFF output H (1) L (3)
Port name When operating from the AC adaptor When operating from the battery
The port settings in the power-off mode are as follows:
Pin 3 Charge ON output L L H
Pin 85 Charging current control output Output port L Output port L 3-mode output
Pin 89 Battery OFF output H (1) L (3) L
Port name When operating from the AC adaptor When operating from the battery When charging
R27
82.
2K
C2580.0047
R2542.2K
R25
618
K
R25
818
0K
R26
03.
3M
R27
356
K
Q254RN1113
C25
00.
1
R25
375
K
R25
215
0K
D812SB10015C
IC803FDT439N CHARGINGCIRCUIT
R257100K
TP803
TP804
R8041.0A
Q253RN1113
TP808
R25
01 R
251
1
IC806 NDC631N
6
5
4 3
2
1
R25982K
Q2522SC4738 GR
C25
40.
1
R25
50.
2MR26224K
R261270K
C25
30.
1
IC805 NJM022V
8 7 6 5
R27
010
0
VCC3 VCC4
GN
D1
O
- +
+
- O
V-
V+ G
D D
D
S
S
BATTERYTERMINAL
SW801Ni-MHBATTERYDETECTIOND
G
S
3 2
1
3 2
1
Reference voltage input section
NFB loop
Resistor to detect the charging current
MD-MT20/20C/20W
– 44 –
–– MEMO ––
MD-MT20/20C/20W
PARTS GUIDE
NOTE:Parts marked with “ ” are important for maintaining the safety of the set.Be sure to replace parts with specified ones for maintaining the safety and performance of the set.
MODEL MD-MT20(S)MD-MT20C(S)MD-MT20W(BL)MD-MT20W(GL)MD-MT20W(S)
“HOW TO ORDER REPLACEMENT PARTS”To have your order filled promptly and correctly, please furnish thefollowing information.
1. MODEL NUMBER 2. REF. No.3. PART NO. 4. DESCRIPTION
MARK: SPARE PARTS-DELIVERY SECTION
For U.S.A. onlyContact your nearest SHARP Parts Distributor to order.
For location of SHARP Parts Distributor,Please call Toll-Free;1-800-BE-SHARP
Explanation of capacitors/resistors parts codesCapacitorsVCC ....................... Ceramic typeVCK ........................ Ceramic typeVCT ........................ Semiconductor typeVC • • MF ............... Cylindrical type (without lead wire)VC • • MN ............... Cylindrical type (without lead wire)VC • • TV ................ Square type (without lead wire)VC • • TQ ............... Square type (without lead wire)VC • • CY ............... Square type (without lead wire)VC • • CZ ............... Square type (without lead wire)VC • • • • • • • • • J .. The 13th character represents capacity difference.
LR37811IC202 RH-IX2567AFZZ J BA 4M bit D-RAM,IX2567AFIC351 VHI74ACT02T-1 J AE Head Driver,74ACT02TIC353 VHIFTD2005/-1 J AG Head Driver,FTD2005IC354 VHICPH5608/-1 J AH Head Driver,CPH5608IC401 RH-IX0298AWZZ J AX System Microcomputer,
IX0298AWIC402 VHIS29L294A-1 J AH EEPROM,S29L294AIC431 VHIS80820LN-1 J AD Reset,S80820LNIC501 VHIAK4519VF-1 J AQ AD/DA Converter,AK4519VFIC601 VHIMPC17A39-1 J AQ 4ch PWM Driver,MPC17A39IC651 VHILB1930M/-1 J AH Head Up/Down Driver,LB1930MIC701 VHIIR3R54N/-1 J AQ Audio Amp.,IR3R54NIC702 VHI62GR4522-1 J AG 4.5V Regulator,62GR4522IC703 VHIIR3R54N/-1 J AQ Audio Amp.,IR3R54NIC771 VHI62GR2522-1 J AG 2.5V Regulator,62GR2522IC801 VHIHN1C01FU-1 J AD Over Voltage Reverse
Connection Protection Circuit,HN1C01FU
IC802 VHIFDC634P/-1 J AG Over Voltage Reverse Connec-tion Protection Circuit,FDC634P
IC803 VSFDT439N//-1 J AL Charging Circuit,FDT439NIC805 VHINJM022V/-1 J AG Charging Circuit,NJM022VIC806 VHINDC631N/-1 J AG Charging Circuit,NDC631NIC807 VHIRN4904//-1 J AD Charging Circuit,RN4904IC808 VHIHN1C01FU-1 J AD Charging Circuit,HN1C01FUIC820 VHI62FP2502-1 J AE 2.5V Regulator,62FP2502IC821 VHIIR3M09N/-1 J AL DC/DC Converter,IR3M09NIC822 VHICPH3403/-1 J AE 2.7V Regulator,CPH3403IC841 VHIXC62HS02-1 J AE 2.35V Regulator,XC62HS02IC851 VHITC7S14FU-1 J AE 2.35V Regulator,TC7S14FUIC871 VHIS8324A28-1 J AH 2.8V Up Converter,S8324A28IC872 VHIS80813LN-1 J AE 2.8V Up Converter,S80813LNIC901 VHIBA6966FV-1 J AM Spindle Motor Driver,BA6966FVQ873 VHINDS332P/-1 J AD FETIC,NDS332P
TRANSISTORSQ101 VS2SA17457/-1 J AB Silicon,PNP,2SA17457Q251 VSRN1113///-1 J AC Digital,NPN,RN1113Q252 VS2SC4738GR-1 J AC Silicon,NPN,2SC4738 GRQ253~255 VSRN1113///-1 J AC Digital,NPN,RN1113Q461 VS2SC4738GR-1 J AC Silicon,NPN,2SC4738 GRQ711 VSRN1444A//-1 J AC Digital,NPN,RN1444 AQ721 VS2SC4213B/-1 J AC Silicon,NPN,2SC4213 BQ874 VSRN1113///-1 J AC Digital,NPN,RN1113Q901 VSRN1113///-1 J AC Digital,NPN,RN1113
DIODESD351 VHDSBE803//-1 J AD Silicon,SBE803D431 VHD1SS361//-1 J AB Silicon,1SS361D461 VHDRB731U//-1 J AC Silicon,RB731UD492 VHE15AZ7R5Y-1 J AC Zener,7.5V,15AZ7.5YD494 VHE15AZ7R5Y-1 J AC Zener,7.5V,15AZ7.5YD800 VHD1SS360//-1 J AB Silicon,1SS360D801 VHDSB10015C-1 J AD Silicon,SB10015CD802 VHE015Z5R1Y-1 J AD Zener,5.1V,015Z5.1YD803 VHD1SS382//-1 J AC Silicon,1SS382D812 VHDSB10015C-1 J AD Silicon,SB10015CD821 VHDEC30LA02-1 J AF Silicon,EC30LA02D822 VHD1SS389//-1 J AB Silicon,1SS389D831 VHD1SS372//-1 J AD Silicon,1SS372D861 VHDEP10LA03-1 J AD Silicon,EP10LA03D871 VHDEP10LA03-1 J AD Silicon,EP10LA03
COILSL100 VPBNN100K0000 J AC 10 µHL171 RCILC0356AFZZ J AC 10 µH,ChokeL201~206 RCILC0353AFZZ J AB Tip Solid Induction,100mAL209 RCILC0353AFZZ J AB Tip Solid Induction,100mAL451 RCILC0352AFZZ J AB Tip Impeder,150mAL452~454 RCILC0353AFZZ J AB Tip Solid Induction,100mAL456 RCILC0353AFZZ J AB Tip Solid Induction,100mAL500 RCILC0344AFZZ J AC 47 µH,ChokeL600 RCILC0331AFZZ J AC 2.2 µH,ChokeL601~604 RCILC0358AFZZ J AC 4.7 µH,ChokeL608~610 RCILC0358AFZZ J AC 4.7 µH,Choke
L702~704 RCILC0353AFZZ J AB Tip Solid Induction,100mAL711~714 RCILC0353AFZZ J AB Tip Solid Induction,100mAL719 VPBNNR47K0000 J AC 0.47 µHL751,752 RCILC0354AFZZ J AC 22 µH,ChokeL771 RCILC0359AFZZ J AC 100 µH,ChokeL821 RCILC0004AWZZ J AF 4.7 µH,ChokeL822 RCILC0005AWZZ J AF 10 µH,ChokeL862 RCILC0359AFZZ J AC 100 µH,ChokeL871 RCILC0344AFZZ J AC 47 µH,ChokeL887,888 RCORF0017AWZZ J AE Tip ImpederL921 RCILC0353AFZZ J AB Tip Solid Induction,100mA
! F871 QFS-L501AAFN0 J AG Fuse,T0.5A L 63VJ701 VHLGP1FB95R-1 J AP Jack,Optical/Line INJ702 QJAKM0014AWZZ J AF Jack,Mic INJ703 QJAKM0015AWZZ J AL Jack,Remote Control/
HeadphonesJ801 QJAKC0007AWZZ J AF Jack,DC INM901 RMOTV0524AFZZ J AS Motor Ass’y [Spindle]M902 RMOTV0511AFZZ J AT Motor Ass’y [Sled]M903 RMOTV0512AFM1 J AR Motor Ass’y [Head Up/Down]PH901(8-3) VHPGP1S93K/-1 J AF Phote Interrupter,GP1S93KSW401 QSW-M0172AFZZ J AD Switch,Push Type [Eject]SW402 QSW-S0948AFZZ J AC Switch,Slide Type [Hold]SW403 QSW-M0172AFZZ J AD Switch,Push Type
[Disc Lid Open]SW801 QSW-M0006AWZZ J AD Switch,Push Type
[Ni-MH Battery Detection]SW902(8-2) QSW-M0170AFZZ J AD Switch,Push Type [Disc Protect]
MECHANICAL PARTS1 NGERH0597AFZZ J AC Wheel,Drive2 NSFTD0334AFZZ J AD Screw,Drive3 LHLDX3141AFM1 J AP Cartridge Holder Ass’y4 MSPRT1625AFFJ J AD Spring,Eject Lever5 LANGF1610AFZZ J AC Bracket,Cancel6 LCHSM0944AFM1 J AT Main Chassis Ass’y7 PCUSG0599AFZZ J AB Cushion,Mechanism8 QPWBH0337AFM1 J AN Mechanism Flexible PWB Ass’y8- 1 ———— — Mechanism Flexible PWB
(Not Replacement Item)8- 2(SW902) QSW-M0170AFZZ J AD Switch,Push Type [Disc Protect]8- 3(PH901) VHPGP1S93K/-1 J AF Phote Interrupter,GP1S93K9 MSPRP0925AFZZ J Spring,Drive Screw10 PCOVP1339AFZZ J AD Cover,Mechanism11 MARMM0170AFM1 J AK Magnetic Field Block12 NGERH0603AFZZ J AE Gear,Drive
! 13 RCTRH8175AFZZ J BM Optical Pickup Unit[Except for U.S.A.]
! 13 RCTRH8175AF10 J BM Optical Pickup Unit [For U.S.A.]14 MSPRP0922AFFJ J AD Spring,Drive Grip15 MSPRP0923AFZZ J Spring,Thrust Plate16 NSFTM0292AFFW J AC Shaft,Guide17 MLEVF2641AFZZ J Lever,Eject18 QPWBH0338AFZZ J AH Magnetic Head Flexible PWB19 MLEVF2637AFM1 J AH Lift Working Lever Ass’y20 MLEVF2638AFFW J AD Lever,Block21 MLEVF2639AFFW J AD Lever,Lift Joint22 MLEVF2640AFZZ J Lever,Lift23 MSPRD1362AFFJ J AD Spring,Lift Lever24 RCILH0112AFZZ J AM Magnetic Head501 LX-BZ0804AFFF J AA Screw,ø1.4×2.2mm502 LX-JZ0154AFZZ J AA Screw,ø1.4×2.8mm
503 LX-BZ0823AFZZ J AA Screw,ø1.4×1.2mm504 LX-WZ9290AFZZ J AA Washer,ø0.8×ø2.4×0.2mm505 LX-BZ0800AFZZ J AA Screw,ø1.4×2.5mm506 XSPSN14P01500 J AA Screw,ø1.7×2.5mm507 LX-JZ0148AFZZ J AA Screw,ø1.7×3mm508 XWSSD14-05000 J AA Washer,ø1.4×0.5mm509 LX-BZ0959AFZZ J AB Screw,ø1.4×1.8mm510 LX-WZ9296AFZZ J AA Washer,ø1.5×ø3.5×0.25mm511 LX-BZ0974AFZZ J AB Screw,ø1.4×5.5mm512 LX-BZ0991AFZZ J AB Screw,ø1.2×1.6mmM901 RMOTV0524AFZZ J AS Motor Ass’y [Spindle]M902 RMOTV0511AFZZ J AT Motor Ass’y [Sled]M903 RMOTV0512AFM1 J AR Motor Ass’y [Head Up/Down]
CABINET PARTS201 GFTAT3004AWM1 J AW Top Cabinet Ass’y
[MD-MT20-S/20C-S/20W-S]201 GFTAT3004AWM2 J AW Top Cabinet Ass’y
[MD-MT20W-BL]201 GFTAT3004AWM3 J AW Top Cabinet Ass’y
(Not Replacement Item)202- 2 PSHEZ0033AWZZ J AD Sheet,Decoration Plate203 TCAUS0044AWZZ J AB Label A,Class 3B
[MD-MT20W Only]204 PSHEZ0035AWZZ J AB Sheet A,Operation Button205 PSHEZ0036AWZZ J AB Sheet B,Operation Button206 PSHEZ0037AWZZ J AC Sheet C,Operation Button207 JKNBZ0623AWSA J AM Button,Operation208 LANGT0058AWFW J AG Bracket,Operation Button209 MSPRP0026AWFW J AB Spring A,Cartridge210 MSPRP0027AWFW J AC Spring B,Cartridge211 MSPRP0028AWFW J AB Spring C,Cartridge212 TCAUS0043AWZZ J AC Label B,Class 3B
[MD-MT20W Only]213 RUNTK0005AWZZ J AV Key Switch Flexible PWB Ass’y214 RUNTZ0015AWZZ J BD LCD Ass’y215 PSHEZ0046AWZZ J AB Sheet E,LCD216 PSHEZ0044AWZZ J AB Sheet C,LCD217 PCUSZ0016AWZZ J AB Cushion,Mechanism,Top218 PSHEZ0045AWZZ J AB Sheet D,LCD219 PCUSZ0017AWZZ J AB Cushion,Cartridge220 GFTAU3008AWSA J AS Bottom Cabinet [MD-MT20-S]220 GFTAU3009AWSA J AS Bottom Cabinet [MD-MT20C-S]220 GFTAU3010AWSA J AS Bottom Cabinet [MD-MT20W-S]220 GFTAU3011AWSA J AS Bottom Cabinet [MD-MT20W-BL]220 GFTAU3012AWSA J AS Bottom Cabinet
[MD-MT20W-GL]221 JKNBZ0625AWSA J AD Button,Hold222 GCOVA1241AWSA J AC Cover,DC IN Jack223 PSHET0014AWZZ J AE Sheet,Bottom Cabinet224 PSHEZ0043AWZZ J AB Insulate Fiber,
Bottom Cabinet Sheet225 LHLDZ3010AWM1 J AW Main Frame Ass’y226 PCUSZ0015AWZZ J AB Cushion,Mechanism,Front227 PCUSZ0014AWZZ J AB Cushion,Mechanism,Right228 PCUSG0534AFZZ J AC Rubber,Preventive Vibration229 PCUSG0641AFSA J AB Insulator230 PSHET0015AWZZ J AB Sheet B,Insulator231 PSHET0016AWZZ J AC Sheet C,Insulator232 PCOVW1009AW00 J AC Cover,Battery Terminal,-233 QTANB9018AWFQ J AD Terminal,Battery,-234 PCOVW1008AW00 J AC Cover,Battery Terminal,+235 QTANB9017AWFQ J AD Terminal,Battery,+236 PGIDM0027AW00 J AC Guide,Battery237 QTANB9016AWFQ J AD Terminal,Battery,+/-238 LHLDZ1231AW00 J AC Holder,Battery Terminal,+/-239 MLEVP0094AW00 J AC Lever,Battery Push240 JKNBZ0624AWSA J AF Lever,Open241 GCABA1185AWSA J AF Front Cabinet
[Except for MD-MT20W-BL]241 GCABA1185AWSB J AF Front Cabinet [MD-MT20W-BL]242 GCABB1185AWSA J AE Rear Cabinet
[Except for MD-MT20W-BL]242 GCABB1185AWSB J AE Rear Cabinet [MD-MT20W-BL]
NO. PRICERANK DESCRIPTIONPARTS CODENO. PARTS CODE
PRICERANK DESCRIPTION
MD-MT20/20C/20W
– 4 –
243 QCNWN1478AWZZ J AG Flat Cable,33Pin244 PSHEF0019AWZZ J AB Felt,Mechanism Flexible PWB245 GDORB0001AWSA J AE Door,Battery [MD-MT20-S/
ACCESSORIES/PACKING PARTS (MD-MT20C/20W)QCNWG0382AFZZ J AK Connecting Cord,RCA TypeQCNWG0422AFZZ J AQ Optical Digital CableRADPA3040AWZZ J AX AC Adaptor [MD-MT20C]RADPA5402AFZZ J BF AC Adapter [MD-MT20W Except
for Taiwan/Australia/New Zealand/Hong Kong]
RADPA5403AFZZ J BF AC Adaptor[MD-MT20W for Taiwan]
RADPA6435AFZZ J BG AC Adaptor [MD-MT20W forAustralia/New Zealand]
RADPA8493AFZZ J BH AC Adaptor [MD-MT20W forHong Kong]
RPHOH0003AWZZ J AZ Headphones [MD-MT20C Only]RPHOH0176AFZZ J AR Earphones [MD-MT20W Only]RRMCW0001AWSA J AZ Remote ControlSPAKA0219AWZZ J AC Packing Add.,Unit [MD-MT20W]SPAKA0220AWZZ J AC Packing Add.,Unit [MD-MT20C]SPAKC0810AWZZ J AG Packing Case [MD-MT20W-S]SPAKC0811AWZZ J AG Packing Case [MD-MT20C]SPAKC0825AWZZ J AG Packing Case [MD-MT20W-BL]SPAKC0829AWZZ J AG Packing Case [MD-MT20W-GL]SPAKZ0485AWZZ J AD Pad,AC Adaptor [MD-MT20C]SPAKZ0486AWZZ J AD Pad,AC Adaptor [MD-MT20W
Except for Australia/New Zealand]
SPAKZ0487AWZZ J AD Pad,AC Adaptor [MD-MT20W forAustralia/New Zealand]
SPAKZ0490AWZZ J AC Pad,Operation Manual[MD-MT20W for Australia/New Zealand Only]
SPAKZ0518AWZZ J AB Sheet,ProtectSPAKZ0522AWZZ J AC Cushion,ProtectTCAUA0040AWZZ J AB Card,Taiwan Caution
[MD-MT20W for Taiwan Only]TCAUH0050AWZZ J AB Caution,Headphones
MT20W-BL for Taiwan Only]TGANZ0022AW21 J AE Card,Taiwan Guarntee [MD-
MT20W-GL for Taiwan Only]TGANZ0022AW32 J Card,Taiwan Guarntee [MD-
MT20W-S for Taiwan Only]TINSE0253AWZZ J AE Operation Manual [MD-MT20W
for Australia/New Zealand]TINSK0093AWZZ J AG Operation Manual [MD-MT20C]TINSZ0431AWZZ J AG Operation Manual [MD-MT20W
Except for Australia/New Zealand]
TLABE0304AWZZ J AB Label,Bar Code [MD-MT20W-Sfor Australia/New Zealand/Taiwan Only]
TLABE0305AWZZ J AB Label,Bar Code [MD-MT20W-GLfor Australia/New Zealand/Taiwan Only]
TLABE0306AWZZ J AB Label,Bar Code [MD-MT20W-BLfor Australia/New Zealand/Taiwan Only]
TLABG0002AWZZ J AB Label,Hong Kong [MD-MT20Wfor Hong Kong Only]
TLABH0055AWZZ J AF Sheet,E/C Comparision [MD-MT20W for Taiwan Only]
TLABJ0009AWSA J AB Label,SHARP Corpration Japan[MD-MT20W for Chile/Peru/Bolivia Only]
TLABJ0010AWZZ J AB Label,Japan [MD-MT20W forChile/Peru/Bolivia Only]
TLABN0088AWZZ J AB Label,SER No. [Except forTaiwan of MD-MT20W]
TLABN0092AWZZ J AB Label,SER No. [MD-MT20C/20Wfor New Zealand]
TLABN0092AW02 J AB Label,SER No. [MD-MT20WExcept for Asia/Middle andNear East/Africa/Australia/New Zealand/Hong Kong]
TLABN0094AWZZ J AB Label,Taiwan SER.No. [MD-MT20W for Taiwan Only]
TLABRF232AWZZ J AB Label,Bar Code [MD-MT20C]TLABR1054AWZZ J AB Label,Bar Code [MD-MT20W-S
for Central South America/Brazil/Chile/Peru/Bolivia Only]
TLABR1055AWZZ J AB Label,Bar Code [MD-MT20W-BLfor Central South America/Brazil/Chile/Peru/Bolivia Only]
TLABR1056AWZZ J AB Label,Bar Code [MD-MT20W-GLfor Central South America/Brazil/Chile/Peru/Bolivia Only]
TLABS0225AWZZ J AB Label,CPA [MD-MT20W for Asia/Middle and Near East/AfricaOnly]
TLABZ0589AWZZ J AB Label,Taiwan Impoter [MD-MT20W-S for Taiwan Only]
TLABZ0590AWZZ J AB Label,Taiwan Impoter [MD-MT20W-BL for Taiwan Only]
TLABZ0591AWZZ J AB Label,Taiwan Impoter [MD-MT20W-GL for Taiwan Only]
TLABZ0600AWSA J AC Label,Made in Malaysia [MD-MT20W for Australia/New Zealand/Brazil Only]
TLABZ0618AWZZ J AB Label,Made in Malaysia [MD-MT20W for Australia/NewZealand/Taiwan/Brazil Only]
TLSTS0011AWZZ J AB Taiwan SS List[MD-MT20W for Taiwan Only]
TSPC-0574AWZZ J AC Label,Taiwan Specifications[MD-MT20W-S for TaiwanOnly]
TSPC-0576AWZZ J AC Label,Taiwan Specification [MD-MT20W-BL for Taiwan Only]
TSPC-0577AWZZ J AC Label,Taiwan Specifications[MD-MT20W-GL for TaiwanOnly]
UBAGC0001AWZZ J AK Battery Carrying CaseUBAGC0002AWSA J AK Carrying CaseUBATM0002AWSA J BC Battery,Rechargeable Nickel-
Metal Hydride92LG-CARD1266E J AB Gurantee Card [MD-MT20W for
Australia/New Zealand Only]92LPLUG155A J AG Adaptor,AC Plug [MD-MT20W
for Middle South America/Brazil/Chile/Peru/Bolivia Only]
ACCESSORIES (MD-MT20)QCNWG0382AFZZ J AK Connecting Cord,RCA TypeQCNWG0422AFZZ J AQ Optical Digital CableRADPA3040AWZZ J AX AC Adaptor [MD-MT20]RPHOH0003AWZZ J AZ Headphones [MD-MT20]RRMCW0001AWSA J AZ Remote ControlTCAUH0050AWZZ J AB Caution,Headphones
[MD-MT20 Only]TINSE0254AWZZ J AE Operation Manual [MD-MT20]TINSZ0429AWZZ J AB Quick Guide [MD-MT20 Only]UBAGC0001AWZZ J AK Battery Carrying CaseUBAGC0002AWSA J AK Carrying CaseUBATM0002AWSA J BC Battery,Rechargeable Nickel-
OTHER SERVICE PARTSUDSKM0001AFZZ J AZ Recording Mini Disc88GMMD-110 J BV High Reflection Disc MMD-110
(TEAC Test MD)88GMMD-212 J BU Low Reflection Disc MMD-212
(TEAC Test MD)88GMMD-213A J Low Reflection Disc MMD-213A
(TEAC Test MD)
MD-MT20/20C/20W
A
B
C
D
E
F
G
H
1 2 3 4 5 6
Figure 5 MD MECHANISM EXPLODED VIEW– 5 –
M903
M902
M901
503x2
502x3
508x2501x2
11
505
24
18509
512
8-2(SW902)
8-1
8
8-3(PH901)
507503
5079
19151
2
1416
13
511510
21
504
12
503
5
3
10
2317
4
22
20
6
7
506
MD-MT20/20C/20W
A
B
C
D
E
F
G
H
1 2 3 4 5 6
Figure 6 CABINET EXPLODED VIEW– 6 –
MD MECHANISM
202-2202-1
202
201
201-1
603x2
203
205207
206204
201-2
214
216x2215
213
217
209
208
211
601
212
210
224
223
240
242
601
602 602244
602x3
225
243
245
238237
229x2
230
239
231603x2
241
226
228
227
PWB-A2
PWB-A1
236
235
234233
232
218
603x2
221603x2
603x2 603222
220
219
219
246
MD-MT20W Only
MD-MT20W Only
247
MD-MT20/20C/20W
– 7 –
PACKING OF THE SET (MD-MT20 ONLY)
Setting position of switches and knobs
UNIT HOLD OFF
Remote Control HOLD CANCEL
A9907-3034NS•HA•M
SHARP CORPORATIONCommunication Systems GroupQuality & Reliability Control CenterHigashihiroshima, Hiroshima 739-0192, Japan
Printed in Japan
COPYRIGHT 1999 BY SHARP COPORATION
ALL RIGHTS RESERVED.No part of this publication may be reproduced,stored in a retrieval system, or transmitted inany from or by any means, electronic, mechanical,photocopying, recording, or otherwise, withoutprior written permission of the publisher.