MZ-G750/R700...7 MZ-G750/R700 Set Panel Assy,Lower Panel Assy, Upper LCD Module Main Board MD Mechanism Deck Service Assy, OP Motor Flexible Board Holder Assy Motor, DC (M602) Motor,
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1
MZ-G750/R700SERVICE MANUAL
FM/AM PORTABLE MINIDISC RECORDER
Model Name Using Similar Mechanism NEW
Mechanism Type MT-MZR700-172
Optical Pick-up Name LCX-4R
(Photo: MZ-G750)
MD recorderAudio playing systemMiniDisc digital audio systemLaser diode propertiesMaterial: GaAlAs MQWWavelength: λ = 790 nmEmission duration: continuousLaser output: less than 44.6 µW(This output is the value measured at adistance of 200 mm from the lens surfaceon the optical pick-up block with 7 mmaperture.)Recording and playback timeWhen using MDW-80
Maximum 160 min. in monauralMaximum 320 min. in stereo
Radio (MZ-G750)Frequency rangeAM: 531-1,602 kHzFM: 87.5-108.0 MHzGeneralPower requirementsSony AC Power Adaptor (supplied)connected at the DC IN 3 V jack:
230 V AC, 50/60 Hz (AEP model)230-240 V AC, 50 Hz (UK/Hong Kongmodel)100-240 V AC, 50/60 Hz (Other models)
1) The battery life may be shorter due to operating conditions and thetemperature of the location.
2) Measured in accordance with the EIAJ (Electronic IndustriesAssociation of Japan) standard.
3) When using a 100% fully charged rechargeable battery.4) When using a Sony LR6 (SG) “STAMINA” alkaline dry battery
(produced in Japan).DimensionsApprox. 81 × 74.4 × 28.1 mm (w/h/d)(3 1/4 × 3 × 1 1/8 in.) without projections.MassApprox. 118 g (4 5/32 oz) the recorder only (MZ-G750)Approx. 116 g (4.1 oz) the recorder only (MZ-R700)Supplied accessoriesAC power adaptor (1)Headphones/earphones with a remote control (1)Optical cable (1)NC-WMAA nickel cadmium rechargeablebattery (1)Rechargeable battery carrying case (1)Carrying pouch/carrying case with a belt clip (except U.S.A model) (1)
Design and specifications are subject to changewithout notice.
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINEWITH MARK 0 ON THE SCHEMATIC DIAGRAMS AND INTHE PARTS LIST ARE CRITICAL TO SAFE OPERATION.REPLACE THESE COMPONENTS WITH SONY PARTS WHOSEPART NUMBERS APPEAR AS SHOWN IN THIS MANUALOR IN SUPPLEMENTS PUBLISHED BY SONY.
2. GENERAL Looking at the Controls (MZ-G750) ................................... 5 Looking at the Controls (MZ-R700) ................................... 6
3. DISASSEMBLY3-1. Panel Assy, Lower ............................................................... 73-2. Panel Assy, Upper ............................................................... 73-3. LCD Module ....................................................................... 83-4. Main Board ......................................................................... 83-5. MD Mechanism Deck ......................................................... 93-6. Service Assy, OP ................................................................. 93-7. Holder Assy ....................................................................... 103-8. Motor Flexible Board ........................................................ 103-9. Motor, DC (M602) ............................................................ 113-10. “Motor, DC (M601)”, “Motor, DC (M603)” .................... 11
4. TEST MODE4-1. Outline ............................................................................... 124-2. Setting Method of Test Mode ............................................ 124-3. Operation in Setting the Test Mode ................................... 124-4. Releasing the Test Mode ................................................... 124-5. Configuration of Test Mode .............................................. 134-6. Manual Mode .................................................................... 134-7. Overall Adjustment Mode ................................................. 144-8. Self-Diagnosis Result Display Mode ................................ 144-9. Result the Error Display Code .......................................... 154-10. Sound Skip Check Result Display Mode .......................... 164-11. Key Check Mode ............................................................... 16
TABLE OF CONTENTS
5. ELECTRICAL ADJUSTMENTS5-1. Outline ............................................................................... 185-2. Precautions for Adjustment ............................................... 185-3. Adjustment Sequence ........................................................ 185-4. NV Reset ........................................................................... 185-5. Power Supply Manual Adjustment .................................... 195-6. Temperature Correction ..................................................... 205-7. Laser Power Check ........................................................... 205-8. Overall Adjustment Mode ................................................. 215-9. Resume Clear .................................................................... 235-10. Patch Data Rewriting when Nonvolatile
Memory was Replaced ...................................................... 23
6. DIAGRAMS6-1. IC Pin Function Description ............................................ 296-2. Block Diagram – Servo Section – ..................................... 356-3. Block Diagram – Audio Section – .................................... 366-4. Block Diagram – System Control/Power Section – .......... 376-5. Printed Wiring Board – Main Section – ............................ 386-6. Schematic Diagram – Main Section (1/3) – ...................... 416-7. Schematic Diagram – Main Section (2/3) – ...................... 426-8. Schematic Diagram – Main Section (3/3) – ...................... 43
8. ELECTRICAL PARTS LIST ...................................... 50
MZ-G750/R700
4
MZ-G750/R700SECTION 1
SERVICING NOTE
NOTES ON HANDLING THE OPTICAL PICK-UPBLOCK OR BASE UNIT
The laser diode in the optical pick-up block may suffer electro-static break-down because of the potential difference generatedby the charged electrostatic load, etc. on clothing and the humanbody.During repair, pay attention to electrostatic break-down and alsouse the procedure in the printed matter which is included in therepair parts.The flexible board is easily damaged and should be handled withcare.
NOTES ON LASER DIODE EMISSION CHECKNever look into the laser diode emission from right above whenchecking it for adjustment. It is feared that you will lose your sight.
NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK(LCX-4R)The laser diode in the optical pick-up block may suffer electro-static break-down easily. When handling it, perform solderingbridge to the laser-tap on the flexible board. Also perform mea-sures against electrostatic break-down sufficiently before the op-eration. The flexible board is easily damaged and should be handledwith care.
OPTICAL PICK-UP FLEXIBLE BOARD
• In performing the repair with the power supplied to the set,removing the MAIN board causes the set to be disabled.In such a case, fix a convex part of the open/close detect switch(S806 on MAIN board) with a tape in advance.Handle the FLEXIBLE board (overwrite head) with care, as ithas been soldered directly to the MAIN board.In repairing the component side of MAIN board, connect theFLEXIBLE board (overwrite head) and the MAIN board withthe lead wires in advance. (See page 8)
• Replacement of CDX2671-203GA (IC801) used in this setrequires a special tool.
• On the set having the microcomputer version 1.000, someadjusted values were set in the manual mode at the shipment,but these data will be cleared when the NV is reset. Therefore,on the set having the microcomputer version 1.000, change theadjusted values following the Change of Adjusted Valuesimmediately after the NV was reset. (See page 18)
• If the nonvolatile memory was replaced on the set, the modifiedprogram data must be written to the nonvolatile memory. In sucha case, write the modified data that meets the microcomputerversion following the patch data rewriting procedure at thereplacement of nonvolatile memory. (See page 23)
laser-tap
S806
MAIN board
FLEXIBLE board(Over write head)
Tape
panel assy, upper
5
MZ-G750/R700SECTION 2GENERAL This section is extracted from
instruction manual.
(MZ-G750)
6
MZ-G750/R700
(MZ-R700)
7
MZ-G750/R700
Set Panel Assy,Lower Panel Assy, Upper LCD Module
Main Board MD Mechanism Deck
Service Assy, OP
Motor Flexible Board
Holder Assy
Motor, DC (M602)
Motor, DC (M601), Motor, DC (M603)
Note : This set can be disassemble according to the following sequence.
SECTION 3DISASSEMBLY
3-1. PANEL ASSY, LOWER
3-2. PANEL ASSY, UPPER
Note : Follow the disassembly procedure in the numerical order given.
1 screws (1.4x2.0), MI
2 screws (1.4x2.0), MI
3 panel assy, upper
4 CN801
2 screws (1.4x2.0), MI
3 screws (1.4x2.0), MI
6 Panel Assy , Lower
4 claw
1
5
8
MZ-G750/R700
3-3. LCD MODULE
3-4. MAIN BOARD
1 screws (1.7x2.5)
4 LCD module
claws
panel assy, upper
2 screws (1.7x2.5)
3
3 screws (M1.4x2)
6 Remove the solders
7
8 Remove the solder
9 case assy, battery
qa spring, battery coil
qs MAIN board
0 Remove the solder
4 screws (M1.7x3)
5 screws (M1.4x2)
1 CN502
2 arm
9
MZ-G750/R700
3-5. MD MECHANISM DECK
3-6. SERVICE ASSY, OP
1 screws (1.4x1.6), MI
2 chassis assy, set
3 MD mechanism deck
boss
boss
4 spring(s), pack
6 spring, thrust detent
3 screw(M1.4), precision pan
5 screw(M1.4), precision pan1 washer (0.8 - 2.5)
2 gear (SA)
8 Pull off the lead screw.
7
B
A
9 Opening the over write head toward the direction A, remove theOP Service assy toward the direction B.Note: Do not open the entire assy
forcibly, when opening the over write head.
over write head section
10
MZ-G750/R700
3-7. HOLDER ASSY
2 Remove two solders of DC motor (over write head up/down) (M603).
1 Remove four solders of DC motor (sled) (M602).
3 Remove four solders of DC motor (spindle) (M601).
DC motor (sled) circular hole
5 motor flexible board
4 adhesive sheet
Note: Align a circular hole in the stripping paperwith a circular hole in the DC motor (sled),when mounting the motor flexible board.
3-8. MOTOR FLEXIBLE BOARD
4 Remove the holder assy to direction of the arrow B.
1 Open the holder assy.
A
2
B
3 boss
11
MZ-G750/R700
4 two screws(M1.4), precision pan
5 moter, DC (sled) (M602)
3 Remove four solders of motor flexible board.
1 washer (0.8 - 2.5)
2 gear (SA)
1 Remove six solders of motor flexible board.
4 three screws(M1.4), precision pan
qs moter, DC (over write head up/down) (M603)
6 two screws(M1.4), precision pan
qa chassis assy, gear
0 screw(M1.2 × 1.5)
9 gear (HA)
8 gear (HB)
7 washer (0.8 - 2.5)
2 washer (0.8 - 2.5)
3 gear (HC)
5 moter, DC(spindle)(M601)
DC motor(over write head up/down)(M603)
gear chassis assy
gear (HA)
2.65 mm
Note: Press-fit the gear (HA) up to the position of the DC motor (over writehead up/down) (M603) as shown below.
3-9. MOTOR, DC (M602)
3-10. “MOTOR, DC (M601)”, “MOTOR, DC (M603)”
12
MZ-G750/R700
2 In the normal mode, turn on the [HOLD] switch. While press-ing the [VOL --] key press the following order:
> t > t . t . t > t. t > t . t X t X
SECTION 4TEST MODE
4-3. Operation in Setting the Test Mode• When the test mode becomes active, first the display check mode
is selected.• Other mode can be selected from the display check mode.• When the test mode is set, the LCD repeats the following dis-
play.
• When the X key is pressed and hold down, the display at thattime is held so that display can be checked.
Caution: On the set having the microcomputer version 1.000,some adjusted values were set in the manual mode atthe shipment, but these data will be cleared when theNV is reset. Therefore, on the set having the micro-computer version 1.000, change the adjusted valuesfollowing the Change of Adjusted Values immediatelyafter the NV was reset (see page 18).
4-4. Releasing the Test ModeFor test mode set with the method 1:Turn off the power and open the solder bridge on SL801 (TEST)on the MAIN board.Note: Remove the solders completely. Remaining could be shorted
with the chassis, etc.For test mode set with the method 2:Turn off the power.Note: If electrical adjustment (see page 18) has not been finished
completely, always start in the test mode. (The set cannotstart in normal mode)
4-1. Outline• This set provides the Overall adjustment mode that allows CD
and MO discs to be automatically adjusted when in the test mode.In this overall adjustment mode, the disc is discriminate betweenCD and MO, and each adjustment is automatically executed inorder. If a fault is found, the system displays its location. Also,the manual mode allows each individual adjustment to be auto-matically adjusted.
• Operation in the test mode is performed with the set. A keyhaving no particular description in the text, indicates a set key.
• For the LCD display, the LCD on the set is shown.
4-2. Setting Method of Test ModeThere are two different methods to set the test mode:1 Short SL801 (TEST) on the MAIN board with a solder bridge
(connect pin 3 of IC801 to the ground). Then, turn on thepower.
MAIN BOARD (SIDE B)
C821
C815
X801
SL801(TEST)
C809
R817
C807
C808
R806
C814
FB80
1
AP817
AP828
BASSAll lit
This set LCD display
SYNCMONOLP24 RECREC DATE REMAIN
1 SHUFF PGM
AMPMF
e88:88
00 5
All off
Microcomputerversiondisplay
Ver 1.200
13
MZ-G750/R700
4-5. Configuration of Test Mode
4-6. Manual ModeMode to adjust or check the operation of the set by function.Normally, the adjustment in this mode is not executed.However, the Manual mode is used to clear the memory, powersupply adjustment, and laser power check before performingautomatic adjustments in the Overall Adjustment mode.
• Transition method in Manual Mode1. Setting the test mode (see page 12).2. Press the > or[VOL +] key activates the manual mode where
the LCD display as shown below.
3. During each test, the optical pick-up moves outward or in-ward while the N or . key is pressed for several sec-onds respectively.
4. Each test item is assigned with a 3-digit item number;100th place is a major item, 10th place is a medium item, andunit place is a minor item.The values adjusted in the test mode are written to thenonvolatile memory (for the items where adjustment wasmade).
Press the > or VOL+ key
Press the x key
Press the x key
Press the x key
Press the x key
Press the N or REC key
The key check quits,or open the upper panel
Press the T MARK key,or ENTER key for severalseconds(about 3 seconds)
ENTER key
Test mode (Display Check Mode)
Servo Adjustment
Manual Mode
Key Check Mode
Audio Adjustment
Power Supply Adjustment
OP Alignment Adjustment
Press the . or VOL– key
Electrical Offset Adjustment
Overall Adjustment Mode
Sound Skip Check Result Display Mode
Self-Diagnosis Result Display Mode
Power Supply AdjustmentAuto item Feed
CD Overall Adjustment/MO Overall Adjustment
00 0Manual
This set LCD display
x key N key
x key N key
Major item switching
Minor item switching
Medium item switching
. key: Unit Place of item number decrease.
VOL – key: 10th Place of item number decrease.
VOL + key: 10th Place of item number increase.
VOL – key: Decreases the adjusted value
VOL + key: Increases the adjusted value
VOL – key: 100th Place of item number decrease.
VOL + key: 100th Place of item number increase.
N key: Unit Place of item number increase.
X key: When adjusted value is chaged: Adjusted value is written. When adjusted value is not changed: That item is adjusted automatically.
Adjusted value variation
Adjusted value write
14
MZ-G750/R700
4-8. Self-Diagnosis Result Display ModeThis set uses the self-diagnostic function system in which if anerror occurred during the recording or playing, the mechanismcontrol block and the power supply control block in themicrocomputer detect it and record its cause as history in thenonvolatile memory.By checking this history in the test mode, you can analyze a faultand determine its location.Total recording time is recorded as a guideline of how long theoptical pickup has been used, and by comparing it with the totalrecording time at the time when an error occurred in the self-diagnosis result display mode, you can determine when the erroroccurred.Clear both self-diagnosis history data and total recording time, ifthe optical pickup was replaced.
• Self-Diagnosis Result Display Mode Setting Method
1. Setting the test mode (see page 12).2. In the display check mode, press the [ENTER] key activates the
self-diagnosis result display mode where the LCD display asshown below.
3. Then, each time the > key is pressed, LCD display descendsby one as shown below. Also, the LCD display ascends by onewhen the . key is pressed.
If the [ENTER] key on set is pressed with this display, the LCDswitches to the simple display mode.
4. Quit the self-diagnosis result display mode, and press the x keyto return to the test mode (display check mode).
5. The display changes a shown below each time the[ENTER] key on the set is pressed.
However in the power mode (item number 700’s), only theitem is displayed.
6. Quit the manual mode, and press the x key to return to thetest mode (display check mode).
4-7. Overall Adjustment ModeMode to adjust the servo automatically in all items.Normally, automatic adjustment is executed in this mode at therepair.For further information, refer to “Section 5 Electrical Adjustments”(see page 18).
This set LCD display
item numberadjustment valueaddress
• Address & Adjusted Value Display
0 113A4S1D
This set LCD display
item numberadjustment valuejitter value
• Jitter Value & Adjusted Value Display
0 110FEJ1D
This set LCD display
item numberadjustment value
block error value
• Block Error Value & Adjusted Value Display
0 11063B1D
This set LCD display
item numberadjustment valueADIP error value
• ADIP Error Value & Adjusted Value Display
0 11072A1D
This set LCD display
item numberadjustment value
• Item Title Display
0 11LrefPw 1D
item title
This set LCD display
error display codeTotal recording time when error occurred
0 XX1 0010
history code
0 XX1
0 XXN
0 XXN1
0 XXN2
0 XXR_
XX :Error code
:Total recording time
15
MZ-G750/R700
• Description of Indication History
History code number Description
1 The first error
N The last error
N1 One error before the last.
N2 Two errors before the last.
R_ Total recording time
4-9. Reset the error display codeAfter servicing, reset the error display code.
• Setting method of Reset the Error Display Code1. Setting the test mode (see page 12).2. Press [ENTER] key activates the self-diagnosis result display
mode.3. To reset the error display code, press the X key (2 times) when
the code is displayed (except “R_****”).(All the data on the 1, N, N1, and N2 will be reset)
• Description of Error Indication Codes
Problem Indication code Meaning of code Simple display Description
No error 00 No error --- No error
01Illegal access target
Adrs Attempt to access an abnormal addressaddress was specified
Servo system error 02 High temperature Temp High temperature
03 Focus error Fcus Disordered focus
04 Spindle error Spdl Abnormal rotation of disc
TOC error11 TOC error TOC Faulty TOC contents
12 Data reading error Data Data could not be read at SYNC
Power supply system error 22 Low battery LBat Momentary interruption detected
4-11. Key Check ModeThis set can check if the set and remote commander function nor-mally.
• Setting Method of Key Check Mode1. Setting the test mode (see page 12).2. Press the [T MARK] key for several seconds (about 3 seconds)
activates the key check mode. (At the last two digits, AD valueof remote commander key line is displayed in hexadecimal)
3. When each key on the set and on remote commander is pressed,its name is displayed on the LCD. (The operated position isdisplayed for 4 seconds after the slide switch is operated. Ifany other key is pressed during this display, the remote com-mander LCD switches to its name display)
Example1: When > key on the set is pressed:
Example2: When N > key on the remote commander ispressed:
4-10. Sound Skip Check Result Display ModeThis set can display the count of errors that occurred during therecording/playing for checking.
• Setting method of sound skip check result displaymode
1. Set the test mode (see page 12).2. Press the N key or [REC] key, and the playing or recording
sound skip result display mode becomes active respectivelywhere the LCD displays the following.
3. When the N key is pressed, total error count is displayed onthe LCD, and each time the > key is pressed, the displayitem moves down by one as shown below. Also, if the . keyis pressed, the display item moves up by one, then if the [REC]key is pressed, the display in the record mode appears.When the [REC] key is pressed, total error count is displayedon the LCD, and each time the > key is pressed, the displayitem moves down by one as shown below. Also, if the . keyis pressed, the display item moves up by one, then ifthe N key is pressed, the display in the play mode appears.
4. To quit the sound skip check result display mode and to returnto the test mode (display check mode), press the x key.
0 00P R
P R
0 00EIB
0 00Stat
0 00Adre
0 00BEmp
0 00######
######
0 00P R
0 00BOvr
0 00Bful
0 00Rtry
0 00######
Playing sound skipresult display
Recording sound skipresult display
:Total play/record errors(hex.):Counter of sound skip check each item(hex.):6-digit address where sound was skipped last(hex.)
This set LCD display
0 00
: AD value of the remote commander Key (hexadecimal OO to FF)
This set LCD display
0 00FF
: AD value of the remote commander Key (hexadecimal OO to FF)
This set LCD display
0 00rPLAY
: AD value of the remote commander Key (hexadecimal OO to FF)
17
MZ-G750/R700
4. When all the keys on the set and on the remote commander areconsidered as OK, the following displays are shown for 4 sec-onds.
Example1: When the keys on the set are considered as OK:
Example2: When the keys on the remote commander are con-sidered as OK:
5. When all keys were checked or if the upper panel is opened,the key check mode quits and the test mode (display checkmode) comes back.
This set LCD display
0 00SET OK
: AD value of the remote commander Key (hexadecimal OO to FF)
This set LCD display
0 00RMC OK
: AD value of the remote commander Key (hexadecimal OO to FF)
18
MZ-G750/R700
• Setting method of NV reset1. Select the manual mode of the test mode, and set item number
021NV Reset (see page 13).
2. Press the X key.
3. Press the X key once more.
4. Press the x key to quit the manual mode, and activate thetest mode (display check mode).
• Change of Adjusted ValuesOn the set having the microcomputer version 1.000, some adjustedvalues were set in the manual mode at the shipment, but these datawill be cleared when the NV is reset. Therefore, on the set havingthe microcomputer version 1.000, modify the adjusted valuesthrough the following procedure immediately after the NV wasreset.
1. Item numbers in which the adjusted values are to be modifiedItem number 832Item number 862Item number 871Item number 872
2. Adjusted values modifying procedure1) Select the manual mode of the test mode, and set item number
832 (see page 13).
2) Adjust with the [VOL+] key (adjusted value up) or [VOL--]key (adjusted value down) so that the adjusted value becomesE4.
SECTION 5ELECTRICAL ADJUSTMENTS
5-1. Outline• In this set, automatic adjustment of CD and MO can be per-
formed by entering the test mode (see page 12).However, before starting automatic adjustment, the memoryclear, power supply adjustment, and laser power check must beperformed in the manual mode.
• A key having no particular description in the text, indicates aset key.
• For the LCD display, the LCD display on the set is shown.
5-2. Precautions for Adjustment1. Adjustment must be done in the test mode only.
After adjusting, release the test mode.2. Use the following tools and measuring instruments.
• Test CD disc TDYS-1(Part No. : 4-963-646-01)
• SONY MO disc available on the market• Digital voltmeter• Laser power meter LPM-8001
(Part No. : J-2501-046-A)• Thermometer (using the Temperature Correction)
3. Unless specified otherwise, supply DC 3V from the DC IN3V jack (J601).
4. Switch positionHOLD switch ............................................... OFF
5-3. Adjustment Sequence
5-4. NV ResetCaution: On the set having the microcomputer version 1.000,
some adjusted values were set in the manual mode atthe shipment, but these data will be cleared when theNV is reset. Therefore, on the set having the micro-computer version 1.000, change the adjusted valuesfollowing the Change of Adjusted Values immediatelyafter the NV was reset.
1. NV Reset(Memory clear)
2. Power Supply Manual Adjustment
3. Temperature Correction(item number:014)
4. Laser Power Check
5. Electrical offset Adjustment
Caution: This adjustment must be made with no disc loaded.
6. CD Overall Adjustment
7. MO Overall Adjustment
8. RESUME Clear
Manual Mode
Manual Mode
Manual Mode
Overall Mode
Overall Mode
This set LCD display
0 21ResNV CC
This set LCD display
0 21Res OK?
This set LCD display
0 21Res
0 21Reset!
NV reset(after several seconds)
This set LCD display
8 32Pw-T W
: Adjusted value
19
MZ-G750/R700
• Adjustment method of Vc PWM Duty (L)(item number: 762)
1. Connect a digital voltmeter to the TP901 (VC) on the MAINboard, and adjust [VOL +] key (voltage up) or [VOL --] key(voltage down) so that the voltage becomes G750: 2.50 ± 0.01V, R700: 2.40 ± 0.01 V.
2. Press the X key to write the adjusted value.(The item number changes to 763 when X key is pressed)
Adjustment and Connection Location: MAIN board(see page 21)
• Adjustment method of Vc PWM Duty (H)(item number: 763)
1. Connect a digital voltmeter to the TP901 (VC) on the MAINboard, and adjust [VOL +] key (voltage up) or [VOL --] key(voltage down) so that the voltage becomes G750: 2.50 ± 0.01V, R700: 2.75 ± 0.01 V.
2. Press the X key to write the adjusted value.(The item number changes to 764 when X key is pressed)
Adjustment and Connection Location: MAIN board(see page 21)
• Adjustment method of Vl PWM Duty(item number: 764)
3) Press the X key to write the adjusted value.4) Select the manual mode of the test mode, and set item number
862 (see page 13).
5) Adjust with the [VOL+] key (adjusted value up) or [VOL--]key (adjusted value down) so that the adjusted value becomes01.
6) Press the X key to write the adjusted value.7) Select the manual mode of the test mode, and set item number
871 (see page 13).
8) Adjust with the [VOL+] key (adjusted value up) or [VOL--]key (adjusted value down) so that the adjusted value becomes20.
9) Press the X key to write the adjusted value.10) Select the manual mode of the test mode, and set item number
872 (see page 13).
11) Adjust with the [VOL+] key (adjusted value up) or [VOL--]key (adjusted value down) so that the adjusted value becomes39.
12) Press the X key to write the adjusted value.
5-5. Power Supply Manual Adjustment• Adjustment sequenceAdjustment must be done with the following steps.
• Setting method of power supply manual adjustment1. Make sure that the power supply voltage is 3V.2. Set the test mode (see page 12).3. Press the . or [VOL--] key to activate the overall adjustment
mode.
4. Press the [END SEARCH] key. (the [END SEARCH] key causesthe item number to be switched to 762.)
This set LCD display
8 62V1dat
: Adjusted value
This set LCD display
8 71V5num
: Adjusted value
This set LCD display
8 72V5dat
: Adjusted value
2. Vc PWM Duty (H) adjustment (item number 763)
3. Vl PWM Duty adjustment (item number 764)
1. Vc PWM Duty (L) adjustment (item number 762)
This set LCD display
0 00Assy 00
This set LCD display
7 62VclPWM
: Adjusted value
digitalvoltmeter
MAIN board
TP901(VC)TP912(GND)
This set LCD display
7 63VchPWM
: Adjusted value
digitalvoltmeter
MAIN board
TP901(VC)TP912(GND)
This set LCD display
7 64Vl PWM
: Adjusted value
20
MZ-G750/R700
2. Press the . key continuously until the optical pick-upmoves to the most inward track.
3. Open the cover and set the laser power meter on the objectivelens of the optical pick-up.
4. Press the N key, and set the laser MO read adjustment mode(item number 011).
5. Check that the laser power meter reading is 0.81 ± 0.08 mW.6. Check that the voltage both ends (TP (+) and TP (–)) of resistor
R521 at this time is below 44 mV.7. Press the N key, and set the laser CD read adjustment
mode (item number 012).
8. Check that the laser power meter reading is 0.97 ± 0.10 mW.9. Check that the voltage both ends (TP (+) and TP (–)) of resistor
R521 at this time is below 44 mV.10. Press the N key, and set the laser MO write adjustment mode
(item number 013).
11. Check that the laser power meter reading is 4.95 ± 0.50 mW.12. Check that the voltage both ends (TP (+) and TP (–)) of resistor
R521 at this time is below 80 mV.13. Press the x key to quit the manual mode, and activate the
test mode (display check mode).
Checking and Connection Location: MAIN board
1. Connect a digital voltmeter to the TP902 (VL) on the MAINboard, and adjust [VOL +] key (voltage up) or [VOL --] key(voltage down) so that the voltage becomes 2.30 ± 0.01 V.
2. When press the X key to write the adjusted value, LCD dis-plays as follows and power supply manual adjustment has com-pleted.
Adjustment and Connection Location: MAIN board
5-6. Temperature Correction• Adjustment Method of temperature correction1. Select the manual mode of test mode, and set the mode num-
ber 014 (see page 13).
2. Measure the ambient temperature.3. Adjust with [VOL +], [VOL --] key so that the adjusted value
(hexadecimal value) becomes the ambient temperature.(Initial value: 14h = 20 °C, Adjusting range: 80h to 7fh (–128°C to +127 °C)
4. Press the X key to write the adjusted value.
5-7. Laser Power CheckConnection :
Checking Method :1. Select the manual mode of test mode (see page 13), and set the
laser power adjusting mode (item number 010).
digitalvoltmeter
MAIN board
TP902(VL)TP912(GND)
This set LCD display
0 00ADJ OK
This set LCD display
0 14SetTmp
: Adjusted value
digital voltmeter
MAIN board
TP(+)TP(–)
laserpower meter
Optical pick-upobjective lens
This set LCD display
0 10Laser
This set LCD display
0 11LrefPw
: Adjusted value
This set LCD display
0 12HrefPw
: Adjusted value
This set LCD display
0 13WritPw
: Adjusted value
21
MZ-G750/R700
5-8. Overall Adjustment Mode• Configuration of overall adjustment
Note: Adjust the CD first, when performing adjustment.
Adjustment/checking and Connection Location:
TP901(VC)
TP912(GND)
TP902(VL)
R521TP(+) TP(–)
–MAIN BOARD(SIDE A)–
. key
> key
N key
N keyProtect switchON
Protect switchOFF
x key
x key
x key
x key
x key
x key
NG item exists or x key
Overall adjustment mode(Title display)
CD overalladjusting
MO overalladjusting
CD overalladjustment
OK
MO overalladjustment
OK
CD overalladjustment
NG
NG item exists or x key
MO overalladjustment
NG
Electricaloffset
adjustment
Power supplyadjustment
auto item feed
ENTER key
END SEARCH key
Test mode (display check mode)
All itemOK
22
MZ-G750/R700
8. If OK through the overall MO adjustments, press the x keyto return to the test mode and terminate the Overall Adjustmentmode.
6. Insert MO disc in the set, and press the > key to set theOverall MO Adjustment mode. Automatic adjustments aremade.
7. In case of MO overall adjustment NG, reset the NV (see page18), then readjust from the temperature correction (see page20).
• Adjustment Method of Overall CD and MO AdjustmentMode
1. Setting the test mode (see page 12).2. Press the . or [VOL --] key activates the overall adjust-
ment mode.
3. Insert CD disc in the set, and press the . key to set theOverall CD Adjustment mode. Automatic adjustments are made.
4. In case of CD overall adjustment NG, reset the NV (see page18), then readjust from the temperature correction (see page20).
5. If OK through the overall CD adjustments, then perform over-all MO adjustments.
• Overall Adjustment Mode (Title Display)
• Electrical Offset Adjusting MethodCaution: The electrical offset adjustment must be made with no
disc loaded.1. Make sure that the power supply voltage is 3V.2. Set the test mode (see page 12).3. Press the . or [VOL--] key to activate the overall adjustment
mode.
4. Press the [ENTER] key.
5. Electrical offset adjustment is over, if the following displayappears.
This set LCD display
0 00Assy
: (Disc mark) At end power supply adjustment:Outside lit At end of electrical offset adj.:inside litNote:On the set having microcomputer version 1.000,the disc mark is displayed on the set LCD only.: Left side = MO overall adjustment information F : MO overall adjustment completed 1 : Manual adjustment exists(overall adj.not completed) 0 : Not adjusted Right side = CD overall adjustment information F : CD overall adjustment completed 1 : Manual adjustment exists(overall adj.not completed) 0 : Not adjusted
This set LCD display
0 00Assy 11
This set LCD display
0 35Ofst
: Adjusted value
This set LCD display
0 00OfstOK
This set LCD display
0 00Assy 11
This set LCD display
X XX
X XX: Item number for which on adjustment is being executed.
CD RUN
This set LCD display
0 00 NG OF
: NG item number
This set LCD display
0 00CD OK
This set LCD display
X XXMO RUN
X XX: Item number for which on adjustment is being executed.
This set LCD display
0 00 NG OF
: NG item number
This set LCD display
0 00MO OK
23
MZ-G750/R700
5-9. Resume ClearPerform the Resume clear when all adjustments completed.
• Resume Clear Setting Method1. Select the manual mode of the test mode, and set item number
043 (see page 13).
2. Press the X key.
3. Press the x key to return to the test mode (display checkmode).
5-10. Patch Data Rewriting When NonvolatileMemory was Replaced
On this set, if the nonvolatile memory was replaced, the modifiedprogram data must be written to the nonvolatile memory.In such a case, write the modified data that meets themicrocomputer version following the procedure provided below.
• Modified Data Writing Method (version 1.000)1. Select the manual mode of the test mode, and set item number
023 (see page 13).
2. Press the [VOL+] key once to change the adjusted value to 01.3. Press the [T MARK] key for several seconds (about 3 seconds)
to activate the patch data write mode.(The following display will appear where 00 is blinking)
4. Adjust with the [VOL+] key (adjusted value up) or [VOL--]key (adjusted value down) so that the adjusted value becomes1E.
• Overall CD and MO adjustment items1. Overall CD adjustment items
Item No. Description
312
313 CD electrical offset adjustment
314
321 CD tracking error gain adjustment
328 CD TWPP gain adjustment
324CD tracking error offset adjustment
332
336 CD ABCD gain adjustment
344 CD focus gain adjustment
345 CD tracking gain adjustment
521CD two-axis sensitivity adjustment
522
2. Overall MO adjustment items
Item No. Description
112
113MO electrical offset adjustment
114
118
221 Low reflective CD tracking error gain adjustment
224Low reflective CD tracking error offset adjustment
232
236 Low reflective CD ABCD level adjustment
244 Low reflective CD focus gain adjustment
245 Low reflective CD tracking gain adjustment
121 MO tracking error gain adjustment
122 MO TON offset adjustment
134 MO TWPP gain adjustment
131MO double speed read TWPP offset adjustment
132
136 MO ABCD gain adjustment
144 MO focus gain adjustment
145 MO tracking gain adjustment
434 MO write TWPP gain adjustment
431 MO write TWPP offset adjustment
432 MO tracking error offset adjustment
436 MO write ABCD gain adjustment
445 MO write tracking gain adjustment
411 MO normal speed read TWPP offset adjustment
412 MO tracking error offset adjustment
448 20 sec full recording
This set LCD display
0 43Resume CC
This set LCD display
0 43ResClr
0 43Res
Resume clear complete
This set LCD display
0 23Patch 00
00: Adjusted value
This set LCD display
0 230D5800
00: Adjusted value
This set LCD display
0 230D581E
1E: Adjusted value
24
MZ-G750/R700
16. Adjust with the [VOL+] key (adjusted value up) or [VOL--]key (adjusted value down) so that the adjusted value becomes20.
17. Press the X key.(0D5F is blinking)
18. Press the [VOL+] key once to change the blinking portion to0D60.
19. Press the x key.(00 is blinking)
20. Adjust with the [VOL+] key (adjusted value up) or [VOL--]key (adjusted value down) so that the adjusted value becomes08.
21. Press the X key.(0D60 is blinking)
22. Press the [VOL+] key once to change the blinking portion to0D61.
23. Press the x key.(00 is blinking)
24. Adjust with the [VOL+] key (adjusted value up) or [VOL--]key (adjusted value down) so that the adjusted value becomesA1.
25. Press the X key.(0D61 is blinking)
26. Press the [VOL+] key once to change the blinking portion to0D62.
5. Press the X key.(0D58 is blinking)
6. Press the [VOL+] key once to change the blinking portion to0D59.
7. Press the x key.(00 is blinking)
8. Adjust with the [VOL+] key (adjusted value up) or [VOL--]key (adjusted value down) so that the adjusted value becomesB2.
9. Press the X key.(0D59 is blinking)
10. Press the [VOL+] key once to change the blinking portion to0D5E.
11. Press the x key.(00 is blinking)
12. Adjust with the [VOL+] key (adjusted value up) or [VOL--]key (adjusted value down) so that the adjusted value becomes8B.
13. Press the X key.(0D5E is blinking)
14. Press the [VOL+] key once to change the blinking portion to0D5F.
15. Press the x key.(00 is blinking)
This set LCD display
0 230D581E
1E: Adjusted value
This set LCD display
0 230D5900
00: Adjusted value
This set LCD display
0 230D59B2
B2: Adjusted value
This set LCD display
0 230D5E00
00: Adjusted value
This set LCD display
0 230D5E8B
8B: Adjusted value
This set LCD display
0 230D5F00
00: Adjusted value
This set LCD display
0 230D5F20
20: Adjusted value
This set LCD display
0 230D6000
00: Adjusted value
This set LCD display
0 230D6008
08: Adjusted value
This set LCD display
0 230D6100
00: Adjusted value
This set LCD display
0 230D61A1
A1: Adjusted value
This set LCD display
0 230D6200
00: Adjusted value
25
MZ-G750/R700
27. Press the x key.(00 is blinking)
28. Adjust with the [VOL+] key (adjusted value up) or [VOL--]key (adjusted value down) so that the adjusted value becomes04.
29. Press the X key.(0D62 is blinking)
30. Press the [VOL+] key once to change the blinking portion to0D65.
31. Press the x key.(00 is blinking)
32. Adjust with the [VOL+] key (adjusted value up) or [VOL--]key (adjusted value down) so that the adjusted value becomes20.
33. Press the X key.(0D65 is blinking)
34. Press the [T MARK] key for several seconds (about 3 seconds)to exit the patch data write mode (to return to the manual modedisplay in the test mode).
35. Press the X key to write the modified data. (The adjusted valuechanges to CC)
36. The modified data writing is over, if the adjusted value changesto DD.
37. Turn the power off.
• Modified Data Writing Method (version 1.100)1. Select the manual mode of the test mode, and set item number
023 (see page 13).
2. Press the [VOL+] key once to change the adjusted value to 01.3. Press the [T MARK] key for several seconds (about 3 seconds)
to activate the patch data write mode.(The following display will appear where 00 is blinking)
4. Press the X key.(0D5C is blinking)
5. Press the [VOL+] key once to change the blinking portion to0D5D.
6. Press the x key.(00 is blinking)
7. Adjust with the [VOL+] key (adjusted value up) or [VOL--]key (adjusted value down) so that the adjusted value becomesAA.
8. Press the X key.(0D5D is blinking)
9. Press the [VOL+] key once to change the blinking portion to0D5E.
10. Press the x key.(00 is blinking)
11. Adjust with the [VOL+] key (adjusted value up) or [VOL--]key (adjusted value down) so that the adjusted value becomes04.
This set LCD display
0 230D6204
04: Adjusted value
This set LCD display
0 230D6500
00: Adjusted value
This set LCD display
0 230D6520
20: Adjusted value
This set LCD display
0 23Patch 01
01: Adjusted value
This set LCD display
0 23 SDD
DD: Adjusted value
This set LCD display
0 23Patch 00
00: Adjusted value
This set LCD display
0 230D5C00
00: Adjusted value
This set LCD display
0 230D5D00
00: Adjusted value
This set LCD display
0 230D5DAA
AA: Adjusted value
This set LCD display
0 230D5E00
00: Adjusted value
This set LCD display
0 230D5E04
04: Adjusted value
26
MZ-G750/R700
12. Press the X key.(0D5E is blinking)
13. Press the [VOL+] key to change the blinking portion to 0D61.
14. Press the x key.(00 is blinking)
15. Adjust with the [VOL+] key (adjusted value up) or [VOL--]key (adjusted value down) so that the adjusted value becomes20.
16. Press the X key.(0D61 is blinking)
17. Press the [VOL+] key to change the blinking portion to 0D64.
18. Press the x key.(00 is blinking)
19. Adjust with the [VOL+] key (adjusted value up) or [VOL--]key (adjusted value down) so that the adjusted value becomesF4.
20. Press the X key.(0D64 is blinking)
21. Press the [VOL+] key once to change the blinking portion to0D65.
22. Press the x key.(00 is blinking)
23. Adjust with the [VOL+] key (adjusted value up) or [VOL--]key (adjusted value down) so that the adjusted value becomes1C.
24. Press the X key.(0D65 is blinking)
25. Press the [VOL+] key once to change the blinking portion to0D66.
26. Press the x key.(00 is blinking)
27. Adjust with the [VOL+] key (adjusted value up) or [VOL--]key (adjusted value down) so that the adjusted value becomes03.
28. Press the X key.(0D66 is blinking)
29. Press the [VOL+] key to change the blinking portion to 0D68.
30. Press the x key.(00 is blinking)
31. Adjust with the [VOL+] key (adjusted value up) or [VOL--]key (adjusted value down) so that the adjusted value becomes80.
32. Press the X key.(0D68 is blinking)
33. Press the [VOL+] key once to change the blinking portion to0D69.
34. Press the x key.(00 is blinking)
35. Adjust with the [VOL+] key (adjusted value up) or [VOL--]key (adjusted value down) so that the adjusted value becomes09.
This set LCD display
0 230D6100
00: Adjusted value
This set LCD display
0 230D6120
20: Adjusted value
This set LCD display
0 230D6400
00: Adjusted value
This set LCD display
0 230D64F4
F4: Adjusted value
This set LCD display
0 230D6500
00: Adjusted value
This set LCD display
0 230D651C
1C: Adjusted value
This set LCD display
0 230D6600
00: Adjusted value
This set LCD display
0 230D6603
03: Adjusted value
This set LCD display
0 230D6800
00: Adjusted value
This set LCD display
0 230D6880
80: Adjusted value
This set LCD display
0 230D6900
00: Adjusted value
This set LCD display
0 230D6909
09: Adjusted value
27
MZ-G750/R700
48. Press the X key.(0D6E is blinking)
49. Press the [VOL+] key to change the blinking portion to 0D72.
50. Press the x key.(00 is blinking)
51. Adjust with the [VOL+] key (adjusted value up) or [VOL--]key (adjusted value down) so that the adjusted value becomes05.
52. Press the X key.(0D72 is blinking)
53. Press the [VOL+] key once to change the blinking portion to0D73.
54. Press the x key.(00 is blinking)
55. Adjust with the [VOL+] key (adjusted value up) or [VOL--]key (adjusted value down) so that the adjusted value becomesD3.
56. Press the X key.(0D73 is blinking)
57. Press the [VOL+] key once to change the blinking portion to0D74.
58. Press the x key.(00 is blinking)
59. Adjust with the [VOL+] key (adjusted value up) or [VOL--]key (adjusted value down) so that the adjusted value becomesF8.
36. Press the X key.(0D69 is blinking)
37. Press the [VOL+] key to change the blinking portion to 0D6C.
38. Press the x key.(00 is blinking)
39. Adjust with the [VOL+] key (adjusted value up) or [VOL--]key (adjusted value down) so that the adjusted value becomesF6.
40. Press the X key.(0D6C is blinking)
41. Press the [VOL+] key once to change the blinking portion to0D6D.
42. Press the x key.(00 is blinking)
43. Adjust with the [VOL+] key (adjusted value up) or [VOL--]key (adjusted value down) so that the adjusted value becomes1C.
44. Press the X key.(0D6D is blinking)
45. Press the [VOL+] key once to change the blinking portion to0D6E.
46. Press the x key.(00 is blinking)
47. Adjust with the [VOL+] key (adjusted value up) or [VOL--]key (adjusted value down) so that the adjusted value becomes03.
This set LCD display
0 230D6C00
00: Adjusted value
This set LCD display
0 230D6CF6
F6: Adjusted value
This set LCD display
0 230D6D00
00: Adjusted value
This set LCD display
0 230D6D1C
1C: Adjusted value
This set LCD display
0 230D6E00
00: Adjusted value
This set LCD display
0 230D6E03
03: Adjusted value
This set LCD display
0 230D7200
00: Adjusted value
This set LCD display
0 230D7205
05: Adjusted value
This set LCD display
0 230D7300
00: Adjusted value
This set LCD display
0 230D73D3
D3: Adjusted value
This set LCD display
0 230D7400
00: Adjusted value
This set LCD display
0 230D74F8
F8: Adjusted value
28
MZ-G750/R700
60. Press the X key.(0D65 is blinking)
61. Press the [VOL+] key once to change the blinking portion to0D75.
62. Press the x key.(00 is blinking)
63. Adjust with the [VOL+] key (adjusted value up) or [VOL--]key (adjusted value down) so that the adjusted value becomes1C.
64. Press the X key.(0D75 is blinking)
65. Press the [VOL+] key once to change the blinking portion to0D76.
66. Press the x key.(00 is blinking)
67. Adjust with the [VOL+] key (adjusted value up) or [VOL--]key (adjusted value down) so that the adjusted value becomes03.
68. Press the X key.(0D76 is blinking)
69. Press the [VOL+] key to change the blinking portion to 0D78.
70. Press the x key.(00 is blinking)
71. Adjust with the [VOL+] key (adjusted value up) or [VOL--]key (adjusted value down) so that the adjusted value becomes01.
72. Press the X key.(0D78 is blinking)
73. Press the [VOL+] key once to change the blinking portion to0D79.
74. Press the x key.(00 is blinking)
75. Adjust with the [VOL+] key (adjusted value up) or [VOL--]key (adjusted value down) so that the adjusted value becomesE0.
76. Press the X key.(0D79 is blinking)
77. Press the [T MARK] key for several seconds (about 3 seconds)to exit the patch data write mode (to return to the manual modedisplay in the test mode).
78. Press the X key to write the modified data. (The adjusted valuechanges to CC)
79. The modified data writing is over, if the adjusted value changesto DD.
80. Turn the power off.
This set LCD display
0 230D7500
00: Adjusted value
This set LCD display
0 230D751C
1C: Adjusted value
This set LCD display
0 230D7600
00: Adjusted value
This set LCD display
0 230D7603
03: Adjusted value
This set LCD display
0 230D7800
00: Adjusted value
This set LCD display
0 230D7801
01: Adjusted value
This set LCD display
0 230D7900
00: Adjusted value
This set LCD display
0 230D79E0
E0: Adjusted value
This set LCD display
0 23Patch 01
01: Adjusted value
This set LCD display
0 23 SDD
DD: Adjusted value
29
MZ-G750/R700SECTION 6DIAGRAMS
6-1. IC PIN FUNCTION DESCRIPTION• IC501 SN761057DBT (RF AMP, FOCUS/TRACKING ERROR AMP)
Pin No. Pin Name I/O Description
1 TE O Tracking error signal output to the system controller (IC801)
2 REXT — Connect terminal to the external resistor for ADIP amp control
3 WPPLPF — Connect terminal to the external capacitor for TPP/WPP low-pass filter
4 VREF O Reference voltage output terminal (+1 V)
5 C I Signal (C) input from the optical pickup detector
6 D I Signal (D) input from the optical pickup detector
7 D-C I Signal (D) input from the optical pickup detector (AC input)
8 IY I I-V converted RF signal (IY) input from the optical pickup detector
9 IX I I-V converted RF signal (IX) input from the optical pickup detector
10 JX I I-V converted RF signal (JX) input from the optical pickup detector
11 JY I I-V converted RF signal (JY) input from the optical pickup detector
12 A I Signal (A) input from the optical pickup detector
13 A-C I Signal (A) input from the optical pickup detector (AC input)
14 B I Signal (B) input from the optical pickup detector
15 TON-C — Connect terminal to the external capacitor for TON hold
16 CIG —Connect terminal to the external capacitor for the low-pass filter of NPP divider
denominator
17 CDN —Connect terminal to the external capacitor for the low-pass filter of CSL divider
denominator
18 PD-I I Light amount monitor input terminal (invert input)
19 PD-NI I Light amount monitor input terminal (non-invert input)
20 PD-O O Light amount monitor output terminal
21 ADIP O ADIP duplex FM signal (22.05 kHz ± 1 kHz) output to the system controller (IC801)
22 DVDD — Power supply terminal (+2.3 V) (digital system)
23 SBUS I/O SSB serial data input/output with the system controller (IC801)
24 SCK I SSB serial clock signal input from the system controller (IC801)
25 XRST I Reset signal input from the system controller (IC801) “L”: reset
26 OFTRK I Off track signal input from the system controller (IC801)
27 DGND — Ground terminal (digital system)
28 BOTM OBottom hold signal output of the light amount signal (RF/ABCD) to the system
controller (IC801)
29 PEAK OPeak hold signal output of the light amount signal (RF/ABCD) to the system
controller (IC801)
30 VREF075 — Connect terminal to the external capacitor for the internal reference voltage
31 VC O Middle point voltage (+1.2 V) generation output terminal
32 CCSL2 — Connect terminal to the external capacitor for TPP/WPP low-pass filter
33 RF OUT O Playback EFM RF signal output to the system controller (IC801)
34 AGND — Ground terminal (analog system)
35 – 37 EQ, LP, PS — Connect terminal to the external capacitor for the RF equalizer
38 AVCC — Power supply terminal (analog system) (+2.3 V)
39, 40 OFC-2, OFC-1 — Connect terminal to the external capacitor for RF AC coupling
41 ABCD O Light amount signal (ABCD) output to the system controller (IC801)
42 FE O Focus error signal output to the system controller (IC801)
43 S-MON O Servo signal monitor output to the system controller (IC801)
44 ADIP-IN I ADIP duplex FM signal (22.05 kHz ± 1 kHz) input terminal
30
MZ-G750/R700
• IC801 CXD2671-203GA (SYSTEM CONTROLLER, DIGITAL SIGNAL PROCESSOR, 16M BIT D-RAM)Pin No. Pin Name I/O Description
1 PAUSE KEY I Set key input terminal (X key input)
2 MIC SENSE OControl signal output to the microphone amp
“H”: HIGH, “L”: LOW, normally: “H” (Not used)
3 XTEST I Input terminal for the test mode set up “L”: test mode (normally fixed at “H”)
Caution:Pattern face side: Parts on the pattern face side seen from the(Side B) pattern face are indicated.Parts face side: Parts on the parts face side seen from the(Side A) parts face are indicated.
• Main board is four-layer printed board.However, the patterns of layers 2 and 3 have not been in-cluded in this diagrams.
* Replacement of IC801 on main boardrequires a special tool.
FB301 1-216-864-11 SHORT 0 (G750)FB301 1-500-329-11 INDUCTOR, FERRITE BEAD (R700)FB302 1-216-864-11 SHORT 0FB303 1-216-864-11 SHORT 0FB304 1-216-864-11 SHORT 0
FB801 1-414-226-11 INDUCTOR, FERRITE BEADFB802 1-216-864-11 SHORT 0FB803 1-216-864-11 SHORT 0FB804 1-216-864-11 SHORT 0FB805 1-216-864-11 SHORT 0
< IC >
IC301 8-759-694-88 IC AK5354VT-E2IC302 8-759-598-15 IC TA2131FL(EL)IC303 8-759-825-56 IC NJM2173AV(TE2)IC501 8-759-689-67 IC SN761057DBTIC551 8-759-698-62 IC SC111257FCR2
IC601 8-759-698-60 IC XPC18A22FCR2
@ IC801 8-752-410-49 IC CXD2671-203GAIC804 8-759-445-94 IC AK6480AM-E2IC805 8-759-196-97 IC TC7SH32FU-TE85RIC901 8-759-698-61 IC XPC18A32FCR2IC1002 8-759-830-82 IC XC61CN1102MR (G750)
IC1003 8-759-657-26 IC XC6368B101MR (G750)IC1004 8-759-694-90 IC XC61CN1702MR (G750)IC1005 8-759-694-89 IC XC61CN1002MR (G750)IC1006 8-759-825-55 IC XC6371C271PR (G750)
< JACK >
J301 1-793-619-21 JACK (LINE IN (OPTICAL))J302 1-793-288-42 JACK (i)J303 1-794-084-12 JACK (MIC (PLUG IN POWER))J601 1-785-383-11 JACK, DC (POLARITY UNIFIED TYPE)
Q301 8-729-037-52 TRANSISTOR 2SD2216J-QR(TX).SOQ302 8-729-046-49 FET FDV304PQ501 8-729-922-10 TRANSISTOR 2SA1577-QRQ601 8-729-046-45 FET SI2302DS-T1Q602 8-729-046-44 TRANSISTOR ZDT6718TA
Q603 8-729-053-71 FET TS8K1TBQ604 8-729-046-43 FET HAT2051T-ELQ605 8-729-046-42 FET HAT2050T-ELQ801 8-729-429-44 TRANSISTOR XP1501Q1001 8-729-052-37 FET XP151A13A0MR (G750)
MAIN
53
MZ-G750/R700
Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark
3-228-300-01 CASE, BELT CLIP CARRYING(G750:AEP,UK,CET,FRR700:AEP,UK,FR,EE)
8-953-304-90 RECEIVER MDR-E805SP SET
Ref. No. Part No. Description Remark
The components identified bymark 0 or dotted line with mark0 are critical for safety.Replace only with part numberspecified.
56
MZ-G750/R700
57
MZ-G750/R700
REVISION HISTORY
Clicking the version allows you to jump to the revised page.Also, clicking the version at the upper right on the revised page allows you to jump to the next revisedpage.