HCD-EC70

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SERVICE MANUAL

Sony CorporationPersonal Audio Division

Published by Sony Techno Create Corporation

US ModelCanadian Model

COMPACT DISC DECK RECEIVER

9-887-133-022006C16-1 2006.03

Ver. 1.1 2006.03

SPECIFICATIONS

HCD-EC70

HCD-EC70 is the Amplifier, CD player, Tape

Deck and Tuner section in MHC-EC70.

Model Name Using Similar Mechanism NEWCD

Base Unit Name BU-K6BD83S2-WODSection

Optical Pick-up Name KSM-213DCP

TAPE Model Name Using Similar Mechanism NEW

Section Tape Transport Mechanism Type

Main unit

AUDIO POWER SPECIFICATIONSPOWER OUTPUT AND TOTAL HARMONIC DISTORTION:

(The United States model only)

With 8 ohm loads, both channels driven, from 150 10,000 Hz; rated 80

watts per channel minimum RMS power, with no more than 10% total

harmonic distortion from 250 milliwatts to rated output.

Amplifier sectionHigh frequency AMP:

Continuous RMS power output (reference): 80 + 80 W (8 ohms at

1 kHz, 10% THD)

Low frequency AMP:

Continuous RMS power output (reference): 160 W (4 ohms at

150 Hz, 10% THD)

Inputs

AUDIO IN (stereo mini jack): Sensitivity 800 mV, impedance

47 kilohms

Outputs

PHONES (stereo mini jack): Accepts headphones with an impedance

of 8 ohms or more

SPEAKER: Accepts impedance of 8 ohms

CD player sectionSystem: Compact disc and digital audio system

Laser Diode Properties

Emission duration: continuous

Laser Output*: Less than 44.6 W

* This output is the value measurement at a distance of 200mm from

the objective lens surface on the Optical Pick-up Block with 7mm

aperture.

Frequency response: 20 Hz 20 kHz

Signal-to-noise ratio: More than 90 dBDynamic range: More than 90 dB

Tape deck sectionRecording system: 4-track 2-channel, stereo

Tuner sectionFM stereo, FM/AM superheterodyne tuner

Antenna:

FM lead antenna

AM loop antenna

FM tuner section:Tuning range: 87.5 108.0 MHz (100 kHz step)

Intermediate frequency: 10.7 MHz

AM tuner section:Tuning range: 530 1,710 kHz (with 10 kHz tuning interval)

531 1,710 kHz (with 9 kHz tuning interval)

Intermediate frequency: 450 kHz

GeneralPower requirementsl: AC 120 V, 60 Hz

Power consumption: 198 W

0.5 W (in Power off)

Dimensions (w/h/d): Approx. 200 306 395 mm

Mass: Approx. 6.4 kg

Design and specifications are subject to change without notice.

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TABLE OF CONTENTS

1. SERVICING NOTES ................................................ 3

2. GENERAL ................................................................... 4

3. DISASSEMBLY3-1. Disassembly Flow ........................................................... 6

3-2. Side Panel (R) And Side Panel (L) .................................. 7

3-3. Top Section ...................................................................... 7

3-4. Mechanical Deck ............................................................. 8

3-5. Belt (1), Belt (2) .............................................................. 8

3-6. Front Panel Section ......................................................... 9

3-7. PANEL Board.................................................................. 10

3-8. JACK Board..................................................................... 10

3-9. MAIN Board.................................................................... 11

3-10. CD Section And Base Unit

(BU-K6BD83S2-WOD) Section ..................................... 12

3-11. Optical Pick-up (KSM-213DCP), BD83S Board ............ 13

3-12. Belt (DLM3A) ................................................................. 143-13. Chassis (PT) Section ....................................................... 14

3-14. PT-AC Board, POWER Transformer............................... 15

3-15. LOW-AMP Board, HIGH-AMP Board,

TRANSISTOR Board...................................................... 15

3-16. DC Fan ............................................................................ 16

4. MECHANICAL ADJUSTMENTS......................... 17

5. ELECTRICAL ADJUSTMENTS .......................... 17

SAFETY-RELATED COMPONENT WARNING!!

COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINEWITH MARK 0 ON THE SCHEMATIC DIAGRAMS AND IN

THE PARTS LIST ARE CRITICAL TO SAFE OPERATION.REPLACE THESE COMPONENTS WITH SONY PARTS WHOSEPART NUMBERS APPEAR AS SHOWN IN THIS MANUAL ORIN SUPPLEMENTS PUBLISHED BY SONY.

ATTENTION AU COMPOSANT AYANT RAPPORT LA SCURIT!

LES COMPOSANTS IDENTIFIS PAR UNE MARQUE 0 SUR

LES DIAGRAMMES SCHMATIQUES ET LA LISTE DESPICES SONT CRITIQUES POUR LA SCURIT DEFONCTIONNEMENT. NE REMPLACER CES COM- POSANTSQUE PAR DES PICES SONY DONT LES NUMROS SONTDONNS DANS CE MANUEL OU DANS LES SUPPLMENTSPUBLIS PAR SONY.

6. DIAGRAMS6-1. Block Diagram BD/DRIVER Section .................. 22

6-2. Block Diagram TUNER Section .......................... 23

6-3. Block Diagram MAIN Section ............................. 246-4. Printed Wiring Board BD83S Board .................... 25

6-5. Schematic Diagram BD83S Board ....................... 26

6-6. Printed Wiring Board MAIN Section ................... 27

6-7. Schematic Diagram MAIN Section (1/5) ............. 28





6-12. Printed Wiring Board PANEL Board ................... 33

6-13. Schematic Diagram PANEL Board ...................... 34

6-14. Printed Wiring Board AMP Section ..................... 35

6-15. Schematic Diagram AMP Section ........................ 36

6-16. Printed Wiring Board PT-AC Board ..................... 37

6-17. Schematic Diagram PT-AC Board ........................ 37

7. EXPLODED VIEWS7-1. Overall Section ................................................................ 46

7-2. Front Panel Section ......................................................... 47

7-3. Chassis Section ................................................................ 48

7-4. Top Section ...................................................................... 49

7-5. CD Mechanism Deck Section (BU-K6BD83S2-WOD) . 50

8. ELECTRICAL PARTS LIST .................................. 51

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Notes on chip component replacement Never reuse a disconnected chip component.

Notice that the minus side of a tantalum capacitor may bedamaged by heat.

Flexible Circuit Board Repairing Keep the temperature of the soldering iron around 270 C

during repairing.

Do not touch the soldering iron on the same conductor of thecircuit board (within 3 times).

Be careful not to apply force on the conductor when solderingor unsoldering.

SAFETY CHECK-OUTAfter correcting the original service problem, perform the following

safety check before releasing the set to the customer:

Check the antenna terminals, metal trim, metallized knobs, screws,

and all other exposed metal parts for AC leakage.

Check leakage as described below.

LEAKAGE TESTThe AC leakage from any exposed metal part to earth ground and

from all exposed metal parts to any exposed metal part having a

return to chassis, must not exceed 0.5 mA (500 microamperes.).

Leakage current can be measured by any one of three methods.

1. A commercial leakage tester, such as the Simpson 229 or RCA

WT-540A. Follow the manufacturers instructions to use these

instruments.2. A battery-operated AC milliammeter. The Data Precision 245

digital multimeter is suitable for this job.

3. Measuring the voltage drop across a resistor by means of a

VOM or battery-operated AC voltmeter. The limit indication

is 0.75 V, so analog meters must have an accurate low-voltage

scale. The Simpson 250 and Sanwa SH-63Trd are examples

of a passive VOM that is suitable. Nearly all battery operated

digital multimeters that have a 2 V AC range are suitable. (See

Fig. A)

Fig. A. Using an AC voltmeter to check AC leakage.

1.5 k0.15FACvoltmeter(0.75 V)

To Exposed MetalParts on Set

Earth Ground

CAUTIONUse of controls or adjustments or performance of procedures

other than those specified herein may result in hazardous radiation

exposure.

UNLEADED SOLDERBoards requiring use of unleaded solder are printed with the lead-

free mark (LF) indicating the solder contains no lead.

(Caution: Some printed circuit boards may not come printed with

the lead free mark due to their particular size)

: LEAD FREE MARKUnleaded solder has the following characteristics.

Unleaded solder melts at a temperature about 40 C higherthan ordinary solder.

Ordinary soldering irons can be used but the iron tip has to be

applied to the solder joint for a slightly longer time.

Soldering irons using a temperature regulator should be set toabout 350 C.Caution: The printed pattern (copper foil) may peel away if

the heated tip is applied for too long, so be careful!

Strong viscosityUnleaded solder is more viscou-s (sticky, less prone to flow)

than ordinary solder so use caution not to let solder bridges

occur such as on IC pins, etc.

Usable with ordinary solderIt is best to use only unleaded solder but unleaded solder may

also be added to ordinary solder.

The laser diode in the optical pick-up block may suffer electrostatic

break-down because of the potential difference generated by the

charged electrostatic load, etc. on clothing and the human body.

During repair, pay attention to electrostatic break-down and also

use the procedure in the printed matter which is included in the

repair parts.The flexible board is easily damaged and should be handled with

care.

NOTES ON LASER DIODE EMISSION CHECKThe laser beam on this model is concentrated so as to be focused on

the disc reflective surface by the objective lens in the optical pick-

up block. Therefore, when checking the laser diode emission,

observe from more than 30 cm away from the objective lens.

LASER DIODE AND FOCUS SEARCH OPERATIONCHECKCarry out the S curve check in CD section adjustment and check

that the S curve waveforms is output three times.

SECTION 1SERVICING NOTES

This appliance is classified as a CLASS 1 LASER product.The CLASS 1 LASER PRODUCT MARKING is located onthe rear exterior.

Laser component in this product is capable of emitting radiation

exceeding the limit for Class 1.

When carrying this system1 Remove all discs to protect the CD mechanism.

2 Hold down CD u (play/pause) on the unit, and press?/1 until STANDBY appears.

3 After LOCK appears, unplug the power cord.

NOTES ON HANDLING THE OPTICAL PICK-UPBLOCK OR BASE UNIT

CAUTION

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HCD-EC70SECTION 2GENERAL

This section is extractedfrom instruction manual.

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s)NSTALLANOISElLTERAVAILABLESEPARATELYTOTHEPOWERCORD

4HEREMOTEDOESNOTFUNCTION

s2EMOVEANYOBSTACLESBETWEENTHEREMOTEANDTHEREMOTESENSORONTHEUNITANDPOSITIONTHEUNITAWAYFROMmUORESCENTLIGHTS

s0OINTTHEREMOTEATTHESYSTEMSSENSOR

s-OVETHEREMOTECLOSERTOTHESYSTEM

#$-0PLAYER

4HESOUNDSKIPSORTHEDISCWILLNOTPLAY

s7IPETHEDISCCLEANANDREPLACEIT

s-OVETHESYSTEMTOALOCATIONAWAYFROMVIBRATIONFOREXAMPLEONTOPOFASTABLESTAND

s-OVETHESPEAKERSAWAYFROMTHESYSTEMORPLACETHEMONSEPARATESTANDS!THIGHVOLUMESPEAKERVIBRATIONMAYCAUSETHESOUNDTOSKIP

0LAYDOESNOTSTARTFROMTHElRSTTRACK

s2ETURNTO.ORMAL0LAYBYPRESSING0,!9-/$%REPEATEDLYUNTILBOTHh0'-vANDh3(5&vDISAPPEAR

3TARTINGPLAYBACKTAKESMORETIMETHANUSUAL

s4HEFOLLOWINGDISCSTAKEALONGERTIMETOSTARTPLAYBACK

nADISCRECORDEDWITHACOMPLICATEDTREESTRUCTURE

nADISCRECORDEDINMULTISESSIONMODE

nADISCTHATHASNOTBEENlNALIZEDADISCTOWHICHDATACANBEADDED

nADISCTHATHASMANYFOLDERS

4HEDISCTRAYDOESNOTOPENANDh,/#+%$vAPPEARS

s#ONTACTYOUR3ONYDEALERORLOCALAUTHORIZED3ONYSERVICEFACILITY

4UNER

3EVEREHUMORNOISEORSTATIONSCANNOTBERECEIVEDh45.%$vORh34%2%/vmASHESONTHEDISPLAY

s#ONNECTTHEANTENNAPROPERLY

s&INDALOCATIONANDANORIENTATIONTHATPROVIDEGOODRECEPTIONANDTHENSETUPTHEANTENNAAGAIN

s4URNOFFNEARBYELECTRICALEQUIPMENT

4APEDECK

4HESOUNDEXHIBITSEXCESSIVEWOWORmUTTERORDROPOUT

s#LEANTHECAPSTANSANDPINCHROLLERS!LSOCLEANANDDEMAGNETIZETHETAPEHEADS3EEh0RECAUTIONSvFORDETAILS

4OIMPROVETUNERRECEPTION4URNOFF#$PLAYERPOWERBYUSINGTHE#$POWER

MANAGEMENTFUNCTION"YDEFAULT#$POWERISTURNEDON

5SEBUTTONSONTHEUNITTOTURNOFF#$PLAYERPOWER

0RESS#$ONTHEREMOTEOR&5.#4)/.REPEATEDLYTOSELECTTHE#$FUNCTION

0RESSTOTURNOFFTHESYSTEM

!FTERh34!.$"9vSTOPSmASHINGPRESS$)30,!9TODISPLAYTHECLOCKANDTHENPRESSWHILEHOLDINGDOWNONTHEUNITh#$0/7%2/&&vAPPEARS7ITH#$PLAYERPOWER

TURNEDOFFDISCACCESSTIMEISINCREASED4OTURNON

#$PLAYERPOWERREPEATTHEPROCEDUREUNTILh#$

0/7%2/.vAPPEARS

4ORESETTHESYSTEMTOFACTORYSETTINGS)FTHESYSTEMSTILLDOESNOTOPERATEPROPERLYRESETTHE

SYSTEMTOFACTORYSETTINGS

5SEBUTTONSONTHEUNITTORESETTHEUNITTOITSFACTORY

-ESSAGES

#!../4,/#+ 4HESYSTEMCANNOTBELOCKEDAFTERYOUHAVEDONETHEPROCEDUREOFh7HENCARRYINGTHISSYSTEMv

#/-0,%4%4HEPRESETOPERATIONENDEDNORMALLY

&5,,9OUTRIEDTOPROGRAMMORETHANTRACKSSTEPS

,/#+%$4HEDISCTRAYDOESNOTOPEN#ONTACTYOURNEAREST3ONYDEALER

./$)3#4HEREISNODISCINTHEPLAYERORYOUHAVELOADEDADISCTHATCANNOTBEPLAYED

./34%0!LLOFTHEPROGRAMEDTRACKSHAVEBEENERASED

./4).53% 9OUPRESSEDANINVALIDBUTTON

/6%29OUHAVEREACHEDTHEENDOFTHEDISCWHILEPRESSINGDURINGPLAYBACKORPAUSE

053(3%,%#49OUTRIEDTOSETTHECLOCKORTIMERDURINGTIMEROPERATION

053(34/0 9OUPRESSED0,!9-/$%DURINGPLAYBACK

2%!$).'4HESYSTEMISREADINGINFORMATIONFROMTHEDISC3OMEBUTTONSARENOTAVAILABLE

3%4#,/#+9OUTRIEDTOSELECTTHETIMERWHENTHECLOCKISNOTSET

3%44)-%29OUTRIEDTOSELECTTHETIMERWHENTHE0LAY4IMERISNOTSET

4)-%.'4HE0LAY4IMERSTARTANDENDTIMESARESETTOTHESAMETIME

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SECTION 3

DISASSEMBLY

This set can be disassembled in the order shown below.

3-1. DISASSEMBLY FLOW

3-3. TOP SECTION(Page 7)

3-6. FRONT PANEL SECTION(Page 9)

3-4. MECHANICAL DECK(Page 8)

3-5. BELT (1), BELT (2)(Page 8)

3-7. PANEL BOARD(Page 10)

3-11. OPTICAL PICK-UP (KSM-213DCP),BD83S BOARD

(Page 13)

3-12. BELT (DLM3A)(Page 14)

3-16. DC FAN

(Page 16)

3-10. CD SECTION AND BASE UNIT(BU-K6BD83S2-WOD) SECTION

(Page 12)

3-13. CHASSIS (PT) SECTION(Page 14)

3-14. PT-AC BOARD,

POWER TRANSFORMER(Page 15)

3-15. LOW-AMP BOARD,HIGH-AMP BOARD,

TRANSISTOR BOARD(Page 15)

3-9. MAIN BOARD(Page 11)

3-8. JACK BOARD(Page 10)

3-2. SIDE PANEL (R) ANDSIDE PANEL (L)

(Page 7)

SET

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4 two screws

(+BV3 10)

9Remove the top sectionin the direction of the arrow.

7 connector

(CNP502)

8 connector

(CNP501)

5 two

claws

6 two

dowels

1 screw

(+KTP3 10)

2 screw

(+KTP3 10)

3 three screws

(+BV3 10)

3-2. SIDE PANEL (R) AND SIDE PANEL (L)

3-3. TOP SECTION

3 side panel (R)

6 side panel (L)

5 two screws

(+BV3 10)

2 two screws

(+BV3 10)

1 four screws

(TP3 12)

4 four screws(TP3 12)

Note: Follow the disassembly procedure in the numerical order given.

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1 Open the cassette box.

3 Slide the lever in the

direction of the arrow.

2four screws(+BVTP 2.68)

4 mechanical deck

2 belt (2)

1 belt (1)

3-4. MECHANICAL DECK

3-5. BELT (1), BELT (2)

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8 JACK HOLD (B) board

6 Turn the front panelsection.

3 screw(+KTP3 10)

4 two screws(+BV3 10)

5 screw(+KTP3 10)

qa front panelsection

2 wire (flat type)27core (CNS111)

1 wire (flat type)

13core (CNS671)

7 two screws(+BVTP 2.68)

9 JACK HOLD (A) board

q; JACK board

3-6. FRONT PANEL SECTION

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3-7. PANEL BOARD

3-8. JACK BOARD

1 two screws(+BVTP 2.68)

5 JACK board

3 JACK HOLD (A) board

2 JACK HOLD (B) board

4 screw(+BVTP 36)

5 PANEL board

3 knob (VOL)

4 claw


1 fifteen screws(+BVTP 2.6 8)

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8 four screws(+BV3 10)

9 screw(+BV3 10)



qs MAIN board

1 connector

(CNP171)

6 connector

(CNP901)

5 connector

(CNP202)

4 connector

(CNP302)

3 connector

(CNP151)

q; connector

(CNP301)

qa Remove soldering fromthe three points.

3-9. MAIN BOARD

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3-10. CD SECTION AND BASE UNIT (BU-K6BD83S2-WOD) SECTION


6 two screws(B2.6)(+BV tapping)

7 two screws(+BVWH tapping)

8 cover (CD mecha)

q; CD section and base unit(BU-K6BD83S2-WOD) section

5 tray panel 4 wire (flat type)23core

9wire (flat type)13core

3Remove the CD section and base unit(BU-K6BD83S2-WOD) section in thedirection of the arrow.


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8 Remove soldering fromthe four points.

7 wire (flat type) (16 core)(CN301)

q; BD83S board

9 optical pick-up(KSM-213DCP)

4 two screws(+PTPWHM 2.6)

1 two screws(+PTPWHM 2.6)

2 two coil springs (insulator)

3 two insulators

5 two coil springs (insulator)

6 two insulators

3-11. OPTICAL PICK-UP (KSM-213DCP), BD83S BOARD

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2 two screws

3 cover

4 belt (DLM3A)

5 belt (DLM3A)

1 two screws



3 rear cabint

5 four screws(+BVTP4 12)

4 Remove soldering fromthe two points.

6 chassis (main mold)

8 HOLD board

7 screw(+BV3 10)

9 AC cord

3-12. BELT (DLM3A)

3-13. CHASSIS (PT) SECTION

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4 PT-AC board,power transformer

1 screw(+BV3 10)

2 lead

5 screw(+BV3 10)

1 connector(CNP201)

4 LOW-AMP board

9 TRANSISTORboard

7 HIGH-AMP board

6 two transisitor

screws

2 screw(+BV3 10)

3 two transisitorscrews

8 screw(+BV3 10)

3-14. PT-AC BOARD, POWER TRANSFORMER

3-15. LOW-AMP BOARD, HIGH-AMP BOARD, TRANSISTOR BOARD

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2 DC fan


3-16. DC FAN

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RECORD/PLAYBACK HEAD AZIMUTH ADJUSTMENTProcedure:

1. Mode: Playback

2. Turn the adjustment screw and check output peaks. If the peaks

do not match for L-CH and R-CH, turn the adjustment screw

so that outputs match within 1dB of peak.

3. Mode: Playback

4. After the adjustments, apply suitable locking compound to

the pats adjusted.

Screwposition

L-CHpeak

within

1dB

Outputlevel

L-CHpeak

R-CHpeak

within1dB

Screwposition

R-CHpeak

0 dB=0.775 VDECK SECTION

set

JACK boardPHONES jack(J102)

+

level meter

test tapeP-4-A063(6.3 kHz, 10 dB)

1. Demagnetize the record/playback head with a head

demagnetizer.

2. Do not use a magnetized screwdriver for the adjustments.

Test Tape

Tape Signal Used for

P-4-A063 6.3 kHz, -10 dB Azimuth Adjustment

set

test tapeP-4-A063

(6.3 kHz, 10 dB)oscilloscope

V H

waveform of oscilloscope

in phase 45 90 135 180

good wrong

JACK board

PHONES jack(J102)

Precaution1. Clean the following parts with a denatured-alcohol-moistened

swab :

record/playback head pinch roller

erase head rubber belts

capstan idlers

2. Demagnetize the record/playback head with a head

demagnetizer. (Do not bring the head magnetizer close to the

erase head.)

3. Do not use a magnetized screwdriver for the adjustments.

4. After the adjustments, appiy suitable locking compound to

the parts adjusted.

5. The adjustments should be performed with the rated power

supply voltage unless otherwise noted.

Torque Measurement

Tape Tension Measurement

Mode Tension Meter Meter Reading

FWD CQ-403Amore than 80 g

(more than 2.82 oz)

2.0 8.0 mN m

(20 to 80 g cm)

(0.28 1.12 oz inch)0.15 0.6 mN m

(1.5 to 6 g cm)

(0.021 0.083 oz inch)

5 17.7 mN m

(50 to 177 g cm)

(0.7 2.48 oz inch)

5 17.7 mN m

(50 to 177 g cm)

(0.7 2.48 oz inch)

CQ-102AS

CQ-102C

CQ-201AS

CQ-201B

Mode

FWD

FWD

back tension

FF

REW

Torque meter Meter reading

SECTION 5ELECTRICAL ADJUSTMENTS

SECTION 4MECHANICAL ADJUSTMENTS

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Checking Location:

+

BD83S board

TP (RFACI)TP (VC)

oscilloscope(DC range)

Procedure :

1. Connect oscilloscope to TP (RFACI) and TP (VC) on the

BD83S board.

2. Press the I/1 button to turn the power ON, and pressthe Z (CD) button to open the CD disc tray.

3. Set disc (YEDS-18) on the tray and press the CDu buttonto playback.

4. Confirm that oscilloscope waveform is as shown in the figure

below. (eye pattern)

A good eye pattern means that the diamond shape () in thecenter of the waveform can be clearly distinguished.

VOLT/DIV: 200 mVTIME/DIV: 500 ns

level:0.9 0.4 Vp-p

TP(VC)

TP(RFACI)

IC201

BD83S Board (SIDE B)

CD SECTION

Note:1. CD Block is basically constructed to operate without adjustment.

2. Use YEDS-18 disc (3-702-101-01) unless otherwise indicated.

3. Use an oscilloscope with more than 10 M impedance.4. Clean the object lens by an applicator with neutral detergent when thesignal level is low than specified value with the following checks.

5. Check the focus bias check when optical pick-up block is replaced.

FOCUS BIAS CHECK

Adjustment Location: Record/Playback/Erase Head

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TUNER SECTION 0 dB=1 V

[AM]Setting:

FUNCTION: TUNER

TUNER/BAND button: AM

[FM]

Setting:FUNCTION: TUNER

TUNER/BAND button: FM

Repeat the procedures in each adjustment several times.

AM RF signalgenerator

30% amplitudemodulation by400 Hz signal

Output level: 54 dBuV

60 cm

set

loop antenna A loop antenna B

+

level meter

32

JACK boardPHONES jack (J102)

FM RF signalgenerator

75kHz frequencydeviation by 1K HzsignalOutput level: as low as possible

(8dBuV)

+

level meter

set

320.01 F

JACK boardPHONES jack (J102)

MAIN boardANTENNACNP802 pin1


digital voltmeter

100 kMAIN boardTP (TUNER VT)

AM FREQUENCY COVERAGE ADJUSTMENT

Adjustment Part Frequency Display Reading on Digital Voltmeter

L852 530 kHz 1.5 0.1 V

Confirmation 1,710 kHz 8 0.5 V

AM TRACKING ADJUSTMENTAdjust for a maximum reading on level meter

L851 530 kHz

FM FREQUENCY COVERAGE ADJUSTMENT

Adjustment Part Frequency Display Reading on Digital Voltmeter

L805 87.5 kHz 1.75 0.1 V

Confirmation 108 kHz 6.2 0.5 V

FM TRACKING ADJUSTMENT

Adjust for a maximum reading on level meter

L804 98 MHz

Adjustment Location: MAIN board (See page 20).

[FM DETECTOR ADJUSTMENT]Setting:

FUNCTION: TUNER

TUNER/BAND button: FM

1. Tune the set to 98 MHz.

2. Adjust L806 so that modulation distortion may become the

best in the vicinity of the maximum value where the tuner out

level becomes 15dBuV or more.

FM RF signalgenerator

Carrier frequency: 98MHzModulation:deviation by FM 75 kHzOutput level: 60 dBuV

+

level meter

MAIN boardTP (TUNER GND)

MAIN boardIC801 pinqs(TUNER OUT L-ch)

set



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Adjustment Location and Connecting Points

IC801

TP (TUNER VT)

TP (TUNER GND)

CNP802

ANTENNA

1

3

L851

AM TRACKINGADJUSTMENT

FM TRACKINGADJUSTMENT

(TUNER GND)

(TUNER VT)

FM FREQUENCYCOVERRANGEADUJUSTMENT

AM FREQUENCYCOVERRANGE

ADUJUSTMENT

L852

L806

L804

L805

FM DETECTORADUJUSTMENT

MAIN BOARD (Component side)

MAIN BOARD (Conductor side)

IC801 pinqs(TUNER OUT L-ch)

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Circuit Boards Location

TRANSISTOR board

LOW-AMP board

HIGH-AMP board

MAIN board

JACK board

PANEL board

PT-AC board

BD83S board

Note on Schematic Diagram: All capacitors are in F unless otherwise noted. (p: pF)

50 WV or less are not indicated except for electrolytics andtantalums.

All resistors are in and 1/4W or less unless otherwise

specified.

f : internal component.2 : nonflammable resistor.5 : fusible resistor.C : panel designation.

H : adjustment for repair.A : B+ Line.B : B Line. Voltages are taken with a VOM (Input impedance 10 M).

Voltage variations may be noted due to normal productiontolerances.

Waveforms are taken with a oscilloscope.Voltage variations may be noted due to normal production

tolerances. BD83S BOARD No mark: CD PLAY

Other Section

No mark: FM( ): TAPE PLAY

: TAPE REC[ ]: CD STOP

Circled numbers refer to waveforms. Signal path.

F : TUNER (FM)f : TUNER (AM)J : CDd : AUXE : PB (TAPE)a : REC (TAPE)

Note on Printed Wiring Boards:X : parts extracted from the component side.Y : parts extracted from the conductor side. f : internal component. : Pattern from the side which enables seeing.

Indication of transistor.

Note:The components identi-fied by mark 0 or dot-ted line with mark0 arecritical for safety.

Replace only with partnumber specified.

Note:Les composants identifispar une marque 0 sont cri-tiques pour la scurit.

Ne les remplacer que par unepice portant le numrospcifi.

Caution:

Pattern face side: Parts on the pattern face side seen from(Side B) the pattern face are indicated.Parts face side: Parts on the parts face side seen from

(Side A) the parts face are indicated.

THIS NOTE IS COMMON FOR PRIN TED WIRING BOARDS AND SCHEMATIC DIAGRAMS.(In addition to this, the necessary note is printed in each block.)

SECTION 6DIAGRAMS

B

These are omitted.

C E

Q

C

B

These are omitted.

E

Q

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6-2. BLOCK DIAGRAM TUNER SECTION

: TUNER(FM)

: TUNER(AM)

Signal Path

5

11

25

7

1

31

83

26

27

28

18

16

17

15

19 20

AM RF-IN

AM-OSC

36 FM RF-IN

34 FM RF-OUT

FM-OSC32

FM/AM

ANTENNA

L851

D851L852

AM OSC

L804FM RF

D802

D803L805

FM OSC

CF80210.7MHz

L803

PD

LP-IN

LP-OUT

DO

DI

CL

CE

X80175kHz

XIN

XOUT

AM-MIX

FM-MIX

FM-DET

AGC

AM IF-IN

FM IF-IN

12

13

L-OUT

R-OUT

IC801AM/FM IF AMP,

MIX, MPX, DET, OSCFM/AM PLL

TU-DO

TU-DI

TU-CE

TU-CLK

TU-ANSD

MAINSECTION(Page 24)

B

TUNERR-CH R-CH

TUNERL-CH L-CH

CNP802

3

1

FM FREQUENCYCOVERAGE

AM FREQUENCYCOVERAGE

AM TRACKING

FM DETECTOR

FM TRACKING

CF803450kHz

TU-DI

TU-CE

TU-DO

TU-ANSD

+9VVM9V

VM9V+3V

+5V

TU-CLK

L806

Q801

Q802

+3VREG

+5VREG

R832

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6-4. PRINTED WIRING BOARD BD83S BOARD See page 21 for Circuit Boards Location. :Uses unleaded solder.

IC203

IC201

IC402

BD83S BOARD (SIDE A) BD83S BOARD (SIDE B)

1

1-868-067- (12)

3

5

E

4

M

(SPINDLE MOTOR)

S201

(LIMIT)

M

(SLED MOTOR)

FMAIN BOARD

CNS104(Page 27)

OPTICAL PICK-UP

BLOCK

KSM-213DCP

12

1-868-067- (12)

12

TP(RFACI)

TP(VC)

1

A

B

C

D

E

F

G

2 3 4 5 6 7 8 9 10 11 12

SemiconductorLocation

Ref. No. Location

IC201 E-8IC203 G-3IC402 C-10

Q321 F-5

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. SCHEMATIC DIAGRAM BD83S BOARD See page 38 for Waveforms. See page 38 for IC Block Diagrams. See page 41 for IC Pin Function Description.

C208

C205

R324

R101

R292

C110

R451

R102

R103

R104

R105

R107

R108

R109

R110

R111

R255

R253

C406

C301

R254

R252

R250

R268

R322

R321

C264

CN301

C222

C213

R291C201

C219

R112

R113

C203

C108

C102

C101

C103

C105

C111

C104

C109

C107

C113

C112

R275

R277

R 27 6 C 27 1

C221

C273

C261

C260

R265

R266

R267R258

C258

R260

C256

C207

C254

C253

C252

C251

C232C206

C224

R278

C272

C204

C218

C291

C292

C217

C202

R401

C303

C322

C321

R323

R452

R421

C404

R207 C226

C265

C210

R256

C257

C323

Q321

C424

R423

C405

IC402

S201

TP

C230

TP

C220

C451

TP2

TP1

TP4

TP3

C274

R257

C304

IC201

R280

C401

C227

R202

C 26 8 C 21 5

C276

C277

IC203IC203

R201

CN102

C266C267

R203

C275

C214

X201

R270

R271

C223

0.1

0.1

100k

100

100

220p

22k

100

100

100

100

100

100

100

100

100

1k

1k

0.1

0.1

10k

10k

1M

10k

2.2

2.2

1000p

16P

0.1

0.1

10010010V

0.1

100

100

10010V

220p

22p

22p

47p

47p

220p

220p

220p

220p

47p

47p

100

100

47 k 0 .1

0.1

470p

0.0

1

0.4

7

4.7

k

1k

4.7k

220k

220p

0

0.1

100 10V

4700p

470p

4700p

470p

0.1

0.1

0.1

100

0.1

0.1

0.1

470p

470p

0.1

0.1

0

10

1

1000p

0

10k

0

0.1

0 1

0.1

0.1

22k

0.1

10010V

2SA2119K

0.1

10k

0.1

BA5947FM-E2

100p

0.1

0.0

47

0.1

100k

1

CXD3014A-201R

0

22010V

1

0

1 0p 0 .1

1

1

BH18LB1WG-TR

0

23P

10p5p

5p

0.1

16.9344MHz

1k

1M

0.1

FRDR

FFDR

TRDR

TFDR

FRDR

FFDR

TRDR

TFDR

SP-

SP+

SL-

SL+

SP+

SP-

SL+

SL-

OPIN-

OPIN+

CH1FIN

CH1RIN

CH2FIN

CH2RIN

GND

CNF4

POWVCC

CH2OUTR

CH2OUTF

CH1OUTR

CH1PUTF

CH4OUTR

CH4OUTF

CH3OUTF

CH3OUTR

POWVCC

MUTE

GND

CH3RIN

CH3FIN

CH4IN

CH4CAPA

OPOUT

PREVCC

VREF

GAIN-SW

MIRR

DFCT

FOK

VSS

LOCK

MDP

SSTP

IOVSS1

SFDR

SRDR

TFDR

TRDR

FFDR

FRDR

IOVDD1

AVDD0

AVSS0

E

F

TEI

TEO

FEI

FEO

VC

A

B

C

D

AVDD4

RFDCO

PDSENS

AC_

SUM

EG_

INLD

PD

RFC

AVSS4

RFACO

RFACI

AVDD3

BIAS

ASYI

ASYO

VPCO

VCTL

AVSS3

CLTV

FILO

FILI

PCO

BCKI

LRCKI

LRCK

VSS

PCMD

BCK

VDD

IOVDD2

DOUT

TEST

IOVSS2

XVSS

XTAO

XTAI

XVDD

AVDD1

AOUT1

VREFL

AVSS1

AVSS2

VREFR

AOUT2

AVDD2

IOVDD0

IOVSS0

XTACN

XRST

VSS

VDD

SENS

WFCK

XUGF

XPCK

GFS

C2PO

SCOR

VDD

COUT

PCMDI

CLOK

SVSS

SVDD

SVSS

SVDD

VSS

SVDD

VDD

VSS

TEST1

SVSS

SVSS

SVDD

JTAGTCK

JTAGTDI

JTAGTDO

JTAGTMS

TRST

VDD

TES1

PLLVDD

PLLVSS

ACK-MP3

REQ-MP3

IREQ-MP3

SSTB-MP3

3 51

XLAT-MP3

XLAT

CLK2

DATA

DATA2

T+

VC

GND

LD

PD

F+

T-

F-

VCC

SCOR

SENS

CLK

XRST

D-OUT

DVDD(3.3V)

AVDD(3.3V)

E

D

A

B

C

F

VR

IREQ-MP3

REQ-MP3

ACK-MP3

XLAT-MP3

XLAT

DATA

DATA-MP3

CLK-MP3

2 4

(LIMIT)

AUTOMATIC

POWER

CONTROL

RF AMP,DSP,MP3

FOCUS/TRACKING

COIL DRIVER,

SLED/SPINDLE

MOTOR DRIVER

OPTICAL

PICK-UP

BLOCK

KSM-213DCP

(SPINDLE)

(SLED)

(VC)

(RFACI)

+1.8V REGULATOR

M-MUTE

D-GND

L-CH

A-GND

R-CH

M-GND

M+7V

XTACN

(APC)

(SPI)

No mark:CD PLAY

(3/5)

CNS104

F

BD83S BOARD

(Page30)

1

2

3 4

7/29/2019 HCD-EC70

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2727

HCD-EC70

HCD-EC70

6-6. PRINTED WIRING BOARD MAIN SECTION See page 21 for Circuit Boards Location. :Uses unleaded solder.


Ref. No. Location

D101 H-6D111 G-7D113 G-7D131 F-8D132 F-8D154 I-7D156 I-7D191 F-6D192 F-6D193 E-6D802 B-3D803 B-4D812 B-2D813 B-2

D814 B-4D851 B-4D901 H-2

IC101 F-10IC401 B-8IC801 C-4

Q102 H-7Q121 I-7Q122 I-7Q131 I-4Q132 I-4Q133 I-5Q134 I-6Q135 G-2Q137 I-4Q138 I-3Q141 I-4Q142 I-5Q151 I-6Q152 I-6Q153 I-6Q154 I-6Q191 F-6Q192 F-6Q251 D-7Q303 B-6Q304 B-6Q305 C-6Q306 C-6

Q507 B-10Q801 B-5Q802 B-5Q901 I-2Q902 I-3Q921 I-3

IC801

IC401

IC101

D193

E

TAPE MECHANISM

DECK

R EC P B

14

1

27

1

13

3 1

26

2

3

15

E

EE

E

E

E

1

1

3

1

123

1

5

E

3

8

E

E

E

E

E

E E E E

notused

E

E

E E

E

E

E

E

E

E

E

18

13

APANELBOARD

CNS701(Page33)

E

PT-ACBOARD

WH151(Page37)

DLOW-AMPBOARD

CNP202(Page35) B

HIGH-AMPBOARDWH302

(Page35)

CHIGH-AMPBOARD

WH301(Page35)

ANTENNAFM/AM

M901

FANMOTOR

L

R

SPEAKERLOWFREQ.

IMPEDANCE:USE8

L

R

SPEAKER

HIGHFREQ.IMPEDANCE:

USE8

FBD83SBOARD

CN102(Page25)

AUDIOIN

1

8 PHONES

R120

R119

1

A

B

C

D

E

F

G

H

I

J

2 3 4 5 6 7 8 9 10 11 12

7/29/2019 HCD-EC70

28/62

2828

CD-EC70

HCD-EC70

. SCHEMATIC DIAGRAM MAIN SECTION (1/5)

30

30

L804

L805

C826C827C828

C852

C824

C823X801

C821

C819

C809

C833

C831

C810

C812

Q801C838

C835

C836

C803

C816

C841

C834

C813

JW805

JW804

JW802

JW803

JR801

JW806

R803

R817

R802

R844

R819

R834R846

R827

R805

R807

R851

R853

R809

R822

R801

R813

R815

R820

R837

R838

R806

R808R804

R830

R842

R839

R811

R818

R835

R845

R829

C817

R812

R848

L852

L851

C807

R816

R832

R836R

840

R833

R863

C840

R843

R814

R841

R849

R859

R860

JW851

C818

C843

D813 R850

D814

D812

R852

R855

D851

C806

C804

C855

C854C851

C830C829

C825C822

C811

C802

C839

Q802C815

C832

CF802

C856

C847C848

C853

L803

CF803

D802

D803

CNP802

C801

L806

C820

IC801

100p100p100p

10pC

18p

18p75KHz0

.047

1000p

0.1K

0.4

7

0.4

7

0.22

0.1

2SC3052F-T1-LF0.1

0.22

0.22

0.01

0.2

2

2250V

220 10V

220 10V

0

10

10k10

10

10k

22k 2.2k

100

100k

100k

22k

100k

1k

2.2

k

2.2k

10k

4.7k

1k

4.7k

4.7k

0

10k0

47k

47k

100

4.7k

47k

4.7k

22

100k

0.1

470

1k

2200p

10k

0

10k

22k

10k

22k

0.47

470k

100

100

22k

4.7k

4.7k

JW

1000p

220p

1PS226-115

2.2

k

1PS226-115

1PS226-115

22

470k

SVC347A-TL-E

1000p

0.1

470pK

10p

D

0.047K

0.010.01

1.0

470p

0.1

0.1K

0.1

2SC3052F-T1-LF100p

0.4

7

5p

C

4700p4700p

0.0

22K

450KHz

SV230

-TB

-E

SV230-TB-E

3P

100 16V

1000p

LV23003VA

See page 38 for Waveform. See page 39 for IC Block Diagram.

7/29/2019 HCD-EC70

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2929

HCD-EC70

HCD-EC70

6-8. SCHEMATIC DIAGRAM MAIN SECTION (2/5)

30

31

32

31

31

32

C313

C3 01 C30 3

C314

C 30 2 C 30 4

Q251

C221

C203

C321

C281

R305

R379

R262

R317

R301

R355

R261

R303

R306

R380

R318R302

R356

R304

R229

R234

R228

R201

R237

R206

R251

Q304

Q303

R320

R319

Q305

Q306

R351

R350

R352

R354

R325

R326

R391

R392

R249

R250

R393R394

R255

1000p

0.047 0 .047

1000p

0.047 0 .047

2SC3052F-T1-LF

0.022

0.022

47010V

150V

1k

47k

4.7

k

4.7k

10k

47k

4.7k

10k

1k

47k

4.7k 10k

47k

10k

100

47k

470

2.2k

47k

2.2k

4.7k

2SC3052F-T1-LF

2SC3052F-T1-LF

4.7k

4.7k

2SA1235-TP-1EF

2SC3052F-T1-LF

22k

47k

4.7k

22k

1k

1k

0

0

220

0

4.7k10k

22k

7/29/2019 HCD-EC70

30/62

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CD-EC70

HCD-EC70

. SCHEMATIC DIAGRAM MAIN SECTION (3/5) See page 38 for Waveform. See page 39 for IC Block Diagram.

28

28

31

29

32

32

34

26

Q507

C567

C564

C562

C561

C526

C525

C501

C502

C407

C408

C406

C404

R427

R428

R530

R529R533

R534

R440

R439

R521

R564

R561

R429

R430

R441

R442

R423

R426

R434

R433R565

R419

R420

R531

R532

R527

R52

2

R528

CNP501

CNP502

R523

R524

R525

R526

C528

C527

C515

R535

C409

C410

R425R424

D191 D192

R194

C191

R 19 5 C 19 2R196R191

C403

R412

R411

R410

R405C402

R403

R404

R406

C415

C416

R402

C193

C196

C418

C417

C508

C513

C514

R514

R512

R506

R519

R520R518

R502

R501

R516R508

R510

C506

C511

C512

R504

C504

C507

R513

R511

R505

R517

R515R507

R509

C505R503

C503

C565

R536

R134

R135

R136

R137

R138

R139

R150

R149

R148

R147

R146

R145

R144

R140

C195

C194

R197

R198

CNS111

C197

C158

C159

C198

C543

C544

R560

C421

CLP101

R408

R407

R431R432R443

R444

R435

R436

C534

C530

C434

C433

C523

C529

C437

C438

L501

C522

C524

R544

R 54 2 R 54 1

C405

C401

Q192

C551

C412

C413

Q191

C510

C509

CNS104

SW501

D193

R543

R545

C431

C432

IC401

2SC3052F-T1-LF

4700p 50V

0.01

2200p

2200p

4700p

4700p

47p

47p

4700p

K

4700p

K

1.0

1.0

100k

100k

2.2k

2.2k

10k

10k

4.7

k4

.7k

22k

4.7

22k

4.7

k

4.7

k

47k

47k

4.7

k

4.7

k

22k

22k

4.7

22k

22k

4.7k

4.7k

4.7k

22k

4.7k

4P

3P

4.7

k

4.7

k

4.7k

4.7

k

1000p

1000p

47p

220

0.2

2

0.2

2

2.2k2.2k

10EDB40-TB5 10EDB40-TB5

47 1/4W

22010V

100 0.11001k

0.1

220

1k

100k

220100 16V

1k

220

1k

0.1

0.1

100

0.1

0.1

2.250V

2.2 50V

0.01

1000p

1000p

100

2.2M

10k

100k

100k100k

100

100

1002.2k

470k

0.047

470p

470p

4.7k

470p

0.01

100

2.2M

10k

100k

1002.2k

470k

0.0474.7k

470p

1

220

470

470

470

470

470

470

470

470

470

470

470

470

470

470

0.10

.1

47 1/4W

47 1/4W

27P

47010V

0.150V

0.1 50V

0.1

1000p

1000p

1k

0.1

4.7k

4.7k

00

0

0

0

0

0.1

0.1

470p470p

0.01

100p470p

470p

100p

0.0

1

4.7

k

10k 22k

0.2

2

50V

0.2

2

50V

KTC3203Y-AT

22 50

47010V

10016V

KTC3203Y-AT

33 50V

33 50V

23P

UDZW-TE17-3.9B

4.7k

4.7k

0.22

0.22

BD3881FV

7/29/2019 HCD-EC70

31/62

3131

HCD-EC70

HCD-EC70

6-10. SCHEMATIC DIAGRAM MAIN SECTION (4/5)

29

29

36

36

29

32

30

HP MUTE

C 18 2 C 18 4

C 18 1 C 18 3

R181

R182

R172

R127

R128

R129

C132 R1

42

R184

R187

R901

R902

R904

R905

R908R909

R907

R912R911R910

R 92 0 R 92 1

R923

CNP901

M901

CNP302

CNP301

R183

R239 R223

R24 3 R24 5

R241

R224

R190

R236

R240

R 242 R 244

C214

R222

R221

R216

R130

C133

R913

R914

R132

C143

R915

J101

L102

L101

RY131

W103

JW129

D901

C 901 C 90 2

Q901

R906

Q902

C903

Q921

C921

J201

RY201

Q134

Q133

0.150V

0.150V

0 . 1 50 V 0 . 1 5 0 V

10

10

10k

471/4W

471/4W

471/4W

0.1

50V

1k

10

10

4.7k

4.7k

47k

100k

4.7k10k

4.7k

101/4W

101/4W

101/4W

2.2 1

220k

3P

FAN MOTOR

5P

5P

10

10 10

10 10

10

10

10

10

10

10 10

0.1 50V

471/4W

471/4W

471/4W

100k

0.01

2.2k

2.2k

10k

470

10V

101/4W

RELAY12V

JW

MC2838-T112-1

150V

1050V

2SC3052F-T1-LF

470

KTA1266GR-AT

10016V

2SC3052F-T1-LF

4.7 50V

RELAY12V

RT1N441C-TP-1

2SC3052F-T1-LF

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CD-EC70

HCD-EC70

1. SCHEMATIC DIAGRAM MAIN SECTION (5/5)

36

29

37

29

30

30

31

D111

D113

C155

C156

R106

R103

R151

R152

R104

R105

R101

R109

R153

R154

R156

R158

R159

R157

J105

D156

R167

R165

R169

R171

R170

R168

R166

R164

R160

R161

R162

C114

C131

R133

R125

R123

R124

R121

C121

R163

R174

R175

R176

R131

D132

R110

WH203

C118 C119

WH103

R107

C134

R177

R178

R179

R180

C110EP102

CLP102

C152

C153

R173

D101

WH201

R108

R117

R185

R265

R267

R102

R122

R119 R120

R111

R113

R115

R199

C135

R118

R186

R266

R112

R114

R116

R200

C136

C137

C138

R268

R259

R260

C142

L103

C116

Q102C113

Q151

Q153

Q152

C151

R155

IC101

D131

D154

J102

Q135

Q121

Q122

C102

C112

C101

WH171CNP171

L106

L105

C140

W172

Q154

L104

C139

W102

C111

CN101 CN102

C141

C105

C106

CNP151

Q131

Q137

Q132

Q138

Q141

Q142

10EDB40-TB5

10EDB40-TB5

0.125V

0.125V

22k

47k

4.7k

4.7k

47k

47k

2.2k

2.2

220k

220k

10k

10k

10k

2.2

k

MC2836-T112-1

10k

10k

4.7

k

4.7

k

10k

10k

22k

22k

2.2

k

2.2

k

100

0.1

0.022

4.7k

22k

470k

100

220k

0.47

10k

100

47k

47k

47k

MC2836-T112-1

2.2

3P

0.1 0.1

3P

22k

0.0

47

4.7

k

4.7

k

0 0

0.1EARTH TERMINAL

0.4

7

0.4

7

220k

D5SBA20-4003

3P

10k

10

10

22

100k

4.7k1/4W

4.7k1/4W

470470

2.2

k

10k

22k

100

1.0

10

10

22

2.2k

10k

22k

100

1.0

100 16V

100 16V

100k

4.7k1/4W

4.7k1/4W

0.01

0

0.022

2SC3052F-T1-LF100025V

2SC3052F-T1-LF

2SC3052F-T1-LF

2SA1235TP

-1EF

10016V

47k

TA7809S

10EDB40

-TB5

MC2838-T112-1

2SC3440-T12-1F

2SC3052F-T1-LF

2SC3052F-T1-LF

330071V

220025V

330071V

8P8P

0

0

0.1

2SA1235TP-1EF

0

0.1

10016V

1P 1P

0.01

0.1

100V

0.1

100V

8P

2SC3052F-T1-LF

2SA1235TP

-1

EF

2SC3052F-T1-LF

2SA1235TP

-1EF

2SC5938-T112-1B

2SC5938-T112-1B

7/29/2019 HCD-EC70

33/62

3333

HCD-EC70

HCD-EC70

6-12. PRINTED WIRING BOARD PANEL BOARD See page 21 for Circuit Boards Location. :Uses unleaded solder.


Ref. No. Location

D701 C-4D702 C-4D703 H-6

IC701 C-5IC703 B-7

Q661 H-6Q662 H-6Q663 H-5Q664 H-6Q665 H-3Q666 H-3Q667 H-4

Q668 H-4Q669 G-3Q670 G-3Q671 G-4Q672 G-4Q701 C-4Q702 C-3Q703 C-3Q704 B-4Q705 C-3Q706 C-3Q707 B-3

IC701

IC703E

E

E

E

E E

E

E

E E

E

E

E E

E

E

E

E

E

1

27

2

26

E

DISC 1DISC 2DISC 3

CD MECHANISM

DECK

Z

DISC SKIP/EX-CHANGER

VOLUME

EQDSGX

( )

( )

PLAY MODETUNING MODE

STOP.

m

>

M

TUNING

FUNCTIONTUNER/BAND

CD

STANDBY

DISPLAY

(BACK LIGHT)

(LIQUID CRYSTAL DISPLAY)

u

?/1

AMAIN BOARD

CNS111(Page 27)

1

A

B

C

D

E

F

G

H

I

2 3 4 5 6 7 8 9

7/29/2019 HCD-EC70

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3434

CD-EC70

HCD-EC70

3. SCHEMATIC DIAGRAM PANEL BOARD See page 38 for Waveforms. See page 44 for IC Pin Function Description.

30

D702

R716

R715

R708

R707

R756

R706

R705

R704

R703

R702

R701

R710

R725

R712

R765 R746 R744 R742R762R766R775

R784

R777

R717

R735

R749

R651

R653

R652

R709

R758

R771

R772

R778

R776

R750

R738

R754

R739

R724

R722

R719

R718

R713

R767

R768

R723

R759

R678

R666

R668

R670

R697

R694

R696

R692

R698R695R667

R671

R683

R681

R688

R693R691

R665R669

R657

R682

R664

R663

R662

R661

R761

R760

R677

R764

R763

JW700

R673

R674

R675

R686

R721

R685

R684

R679

R672

R676

R689

R734

R753

R779

R733R770

C742

C743

R786

R787

R788

C710

C722

C719

R736

R727

C712

C732

C733R755

C707

C723

C728

C729

C730

C739

C738

C737

C714

C715

C709

C708

C704

L702

C711

C702

C703

C705

Q701

D701

R785

R711

C701Q702

Q703

Q705

Q706

C724

C720

D703

C725

C726

Q661

C672

Q66 3 C671

Q666

Q 66 8 Q 67 0Q672

IC703

Q707

CNS701X702

C716

LED701

R714

R757

C731

C717

C718

C735

C706

X701

R731 R730

L701

C741

R748

JR704

R726

C713

R751

SW705 SW701

C734

S W7 21 S W7 19 S W7 10 S W7 09

R 78 0 R 77 4 R 77 3 R 76 9 R 747 R745 R743

S W7 06 S W7 0 4 S W7 03 S W7 02

S W7 20 S W7 08 S W7 16 S W7 15 S W7 14 S W7 13 S W7 12 S W 71 1

R781

LED702

R687

Q671Q669Q667Q665

Q662Q664

CNS671

R728

SW700

W701

C727

LCD702

IC701

Q704

MC2836

1k

1k

1k

1k

1k

1k

1k

1k

4.7k

1k

1k

4.7k

1k

4.7k

4.7k 2.2k 2.2k1k

10k22k47k

100k

470

1k

1k

1k

47k

47k

47k

1k

1k

1k

470

1k

1k

1k

10k10k

10k

1k

220k

1k

1k

10k

10k

10k

2.2

k

100

470

470

470

470

470

470

470

470

47k47k47k

47k

47k

22k

2.2

47k47k47k47k

470k

220k

47k

47k

47k

47k

47k

100k

22k

22k

22k

22k

22k

22k

4.7k

470

22k

2.2

22k

22k

22k

10k

470

100

100

47k47k

220pK

220pK

10

47

0

0.22

4700p

0.1

0

0

0.1

22p

22p 0

0.001

0.001

0.001

0.001

0.001

0.001

0.001

0.001 0.0

01

0.0

01

0.0

01

47p

470 10V

0

0.1

0.1

100

16V

0.01

2SA1235TP-1EF

UDZSTE-173.6B

10k

22k

0.1 2SC3052F-T1-LF 2SC3052F-T1-LF

2SC3052F-T1-LF

2SC3052F-T1-LF

47p

0.1

1PS226

-115

0.1

0.1

RT1N441C-TP-1

0.1

2SC3052F-T1-LF

2250V

2SC3440-T12-1F

2SC3440-T12-1F

2SC3440-T12-1F

2SC3440-T12-1F

RPM7240-H18

2SC3052F-TI1-LF

27P

4.1

9MHz

0.1

1L0341Y23E0CA602

(BACK

-LIGHT)

10k

100k

0.1

1000p

1000p

0.0

01

0.1Z

32768Hz

1 0k 1 0k

0

220p

47k

0

100k

47p100k

1000p

47k 22k 10k 4.7k 2.2k 2.2k 1k

SLR-342VRT32

4.7k

2SA1365- T12-1EF2SA1365- T12-1EF2SA1365- T12-1EF2SA1365- T12-1EF

KTA1273-Y-AT2SA1235TP-1EF

13P

10k

WIRE1P

0.1

LIQUID CRYSTALDISPLAY

MB90802-108

RT1N441C- TP-1

10k

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HCD-EC70

6-14. PRINTED WIRING BOARD AMP SECTION See page 21 for Circuit Boards Location. :Uses unleaded solder.


Ref. No. Location

D201 C-10D207 D-11D208 D-10D361 C-5

IC201 D-10IC301 C-3

Q201 D-12Q203 D-12Q207 D-11Q301 C-5Q302 C-5Q361 D-1Q366 D-5Q367 C-5

IC301

IC201

BMAIN BOARD

CNP302(Page 27)

CMAIN BOARD

CNP301(Page 27)

E

EE

E

E

E

E

E

DMAIN BOARD

WH201(Page 27)

1

A

B

C

D

E

2 3 4 5 6 7 8 9 10 11 12 13

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CD-EC70

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5. SCHEMATIC DIAGRAM AMP SECTION

31 31

4 /5 4 /5

32

R370

R374

R375

R373

R385

R386

R203

R210 R211

C206

R202

R208

R205

R247

R246

R248

R 25 6 R 25 7

C308 C 307

C204

R204

R220

C216

R232

R238

R252

JW221 JR201

C208

C205

R253

R254

C224

C202

WH301WH302

C365

C364

IC201

C223R214R215

R213 R218

R217

R235

R212

R225

R227

R226

D208

R207

C207

C212

C213

C209

R209

Q201

R230

R231

C217

D207

R233

IC301

D201

Q366

Q367

R343

R344

R339

R340

C361

R359

R353

R361

R327Q361

R365

C358

R396R368

R3 67 R3 95

C357

C309

R309

R307

R315

R313 C311

C310

R310

R308

R314

C360

EP301

C362

C363

R376R371

R372 R377

JW303

C306

R311

R312

C305

TH361

R316

C312

R324

R322

R323

R321

R358

R338

R 33 0 R 33 4

R342Q302

D361

R341

Q301

R349

R337

R 32 9 R 33 1

C319

C320

WH303

CNP201

CNP202

CLP202

Q203

Q207

R362

R387

10k

100k

10k

2.2k

470k

1k

150

150

1k

0.223W

0.223W

10025V

47k

4.7k1/4W

4.7k1/4W

4.7k1/4W

4.7k1/4W

4.7k1/4W

1 00 4 7k

2250V

47k

1k

0.2250V

22k

220

JR

JW 0

220p

10p

0

0

0.0047

220p

5P5P

0.01

0.01

STK404-130S

0.04710k10k

220 4.7k

10k

2.2k

10

10

10

10

MC2838-T112-1

4.7k1/4W

4750V

0.150V

0.150V

100100V

220

2SA2026

22k

4.7k

1050V

MC2838-T112-1

22k

STK403-090-S

UDZS

-TS17

-12B

2SA2026

2SC5625

22k

22k

1k

1k

100 50

0

22k

22k

02SC3052F-T1-LF

4.7k

0.0047

047k

47k 0

0.0047

4.750V

1k

220

JR

47k 10p50V

4.750V

1k

220

47k

0.1

EARTH TERMINAL

10100V

10100V

220220

220 220

JW

470p

100

100470p

THERMISTOR

0

10p50V

0.222W

0.222W

0.222W

0.222W

10k

22k

220 10k

2.2k2SA2026

MC2838-T112-1

2.2k

2SA2026

10k

22k

220 10k

0.0047

0.0047

5P

6P

3P

CCLIP40MM

2SC3052F-T1-LF

2SC3052F-T1-LF

10k

1k

See page 40 for IC Block Diagram.

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6-16. PRINTED WIRING BOARD PT-AC BOARD See page 21 for Circuit Boards Location.

:Uses unleaded solder.

6-17. SCHEMATIC DIAGRAM PT-AC BOARD

32

T002

T001

R052

C053

W052

C052

PT001

RY001

C051

C054

C055

PT002

WH151

L001

D052

D051

R051

1P TERMINAL

1P TERMINAL

4.7k

0.150V

WIRE-EARTHGND

0.1 25V

AC POWERRELAY

0.150V

0.47 25V

0.47 25V

8P

MC2836-T112-1

MC2836-T112-1

4.7k

POWER TRANSFORMER (SUB)

POWER TRANSFORMER (MAIN)

1

8

NOT REPLACEABLE

BULT IN TRANSFORMER

AC IN

*

*

EMAINBOARD

CNP151(Page27)

1

A

B

C

D

E

F

G

2 3 4 5 6 7 8


Ref. No. Location

D051 E-5D052 E-5

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IC801 LV23003VA

MAIN Board

1AM RF-IN

3FM-MIX

2REG

6VCC1

4GND1

AM

RF

AM

MIX

AM

DET

AM

IF

FM

DET

FM

IF

SD

FF

VCO

FF

FF

ST

TRIG

STSW

FM

MIXFM

OSC

AM

OSC

OSC

BUFFER

FM

S-METER

DECODER

PHASE

COMPARATOR

MUTE

PROGRAMMABLE

DIVIDER

REFERENCE

DIVIDER

UNLOCKDETECTOR

SWALLOW

COUNTER

POWER ON

RESET

DATA SHIFT

REGISTER

LATCH

PHASE

DETECTOECHARGE

PUMP

UNIVERSAL

COUNTER

5AM-MIX

7AMIF-IN

8FMIF-IN

9P-DET

10P-COMP

11FM-DET

12L-OUT

13R-OUT

14VSS

FM

RF36 FM RF-IN

35 GND2

34 FMRF-OUT

33 VCC2

30 BO2

29 BO1

32 FM-OSC

31 AM-OSC

28 A-OUT

27 A-IN

23 DET-OUT

15CE

16DI

17CL

18DO

22 MPX-IN

19 XIN

20 XOUT

21 VDD

26 PD

25 AGC

24 AM LOW-CUT

LOW-PASS

FILTER

AGC

IF

BUFFER

PIROT

DET

CCB

I/F

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HIGH-AMP Board

IC301 STK403-090-S

Pre Driver

CH1

1

-VCC

2

-VP

3

+VP

4

LO+

5

LO-

6

RO+

7

RO-

Pre Driver

CH2

8

+VCC

9

SUB

10

GND

11

LI+

12

LI-

13

STBY

14

RI-

15

RI+

SUB

BIAS CIRCUIT

IC401 BD3881FV

28

REC1O

27

REC1N

26

REC2N

25

REC2O

24

INC2

23

INC1

22

INB2

21

INB1

20

INA2

19

INA1

18

OUT1

17

BAS1

16

OUT2

15

BAS2

BASS BASS

13

CONT

14

VEE

12

VDD

11

TRE2

10

TRE1

TREBLE

TREBLE

7

VOLIN1

8

VOLIN2

9

GND

VOLUME

VOLUME

6

PB1O

LOGIC

CONTROL

5

PB2O

4

PB2N

1

PB1N

2

PB1P

3

PB2P

MAIN Board

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IC Pin Function DescriptionBD83S BOARD IC201 CXD3014A-201R (RF AMP, DSP, MP3)

Pin No. Pin Name I/O Description

1 LRCK O L/R sampling clock signal output terminal

2 LRCKI I L/R sampling clock signal input terminal3 PCMD O Serial data output terminal

4 PCMDI I Serial data input terminal

5 BCK O Bit clock signal output terminal

6 BCKI I Bit clock signal input terminal

7 XTACN IOscillation circuit on/off switch control signal input from the system controller

L: oscillation stop, H: self-oscillation

8 XRST I System reset signal input from the system controller L: reset

9 VSS Ground terminal

10 IREQ-MP3 O MP3 data request signal output to the system controller

11 CLOK I CD serial data transfer clock signal input from the system controller

12 DATA2 I MP3 serial data input from the system controller

13 XLAT-MP3 I MP3 serial data latch pulse signal input from the system controller

14 REQ-MP3 I MP3 data request signal input from the system controller

15 ACK-MP3 O MP3 acknowledge signal output to the system controller

16 XLAT I CD serial data latch pulse signal input from the system controller

17 VDD Power supply terminal (+1.8V)

18 SVSS Ground terminal

19 SVDD Power supply terminal (+1.8V)

20 SENS O Internal status (SENSE) signal output to the system controller

21 WFCK O WFCK output (Not used)

22 XUGF O XUGF output (Not used)

23 XPCK O XPCK output (Not used)

24 GFS O GFP output (Not used)

25 C2PO O C2PO output (Not used)

26 SCOR O Subcode sync (S0+S1) detection signal output to the system controller


28 COUT I/O Track number count signal input/output (Not used)



31 MIRR I/O Mirror signal input/output (Not used)

32 DFCT I/O Defect signal input/output (Not used)33 FOK I/O Focus OK signal input/output (Not used)




37 LOCK I/O Not used

38 MDP O Spindle motor servo control signal output terminal

39 SSTP I Disc inner position detection signal input terminal

40 IOVSS1 Ground terminal

41 SFDR O Sled servo drive signal (+) output to the coil/motor driver

42 SRDR O Sled servo drive signal () output to the coil/motor driver

43 TFDR O Tracking servo drive signal (+) output to the coil/motor driver

44 TRDR O Tracking servo drive signal () output to the coil/motor driver

45 FFDR O Focus servo drive signal (+) output to the coil/motor driver

46 FRDR O Focus servo drive signal () output to the coil/motor driver

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47 IOVDD1 Power supply terminal (+3.3V)

48 AVDD0 Power supply terminal (+3.3V)

49 AVSS0 Ground terminal

50 E I E signal input from the optical pick-up block

51 F I F signal input from the optical pick-up block

52 TEI I Tracking error signal input terminal

53 TEO O Tracking error signal output terminal

54 FEI I Focus error signal input terminal

55 FEO O Focus error signal output terminal

56 VC O Middle point voltage output terminal

57 A I A signal input from the optical pick-up block

58 B I B signal input from the optical pick-up block

59 C I C signal input from the optical pick-up block

60 D I D signal input from the optical pick-up block 61 AVDD4 Power supply terminal (+3.3V)

62 RFDCO O RFDC signal output (Not used)

63 PDSENS I Reference voltage pin (Connected to ground)

64 AC_SUM O RFAC summing amplifier signal output terminal

65 EQ_IN I RF equalizer circuit input terminal

66 LD OLaser diode on/off control signal output to the automatic power control circuit

L: laser off, H: laser on

67 PD I Light amount monitor input from the optical pick-up block laser diode

68 RFC I Equalizer cut off frequency adjustment terminal


70 RFACO O EFM signal output terminal

71 RFACI I EFM signal input terminal


73 BIAS I Asymmetry circuit constant current input terminal

74 ASYI I Playback EFM asymmetry comparator voltage input terminal

75 ASYO O Playback EFM full-swing output terminal

76 VPCO O Charge pump output terminal for broad-band EFM PLL (Not used)

77 VCTL I VCO2 control voltage input terminal for broad-band EFM PLL


79 CLTV I VCO1 control voltage input terminal for multiplier

80 FILO O Filter output terminal for master PLL81 FILI I Filter input terminal for master PLL

82 PCO O Charge pump output terminal for master PLL



85 SSTB-MP3 I MP3 standby control signal input terminal L: standby (Connected to ground)



88 TEST1 I Test terminal (Connected to ground)

89 DATA I CD serial data input from the system controller

90 CLK2 I MP3 serial data transfer clock signal input from the system controller



93 JTAGTCK Connected to ground

94 JTAGTDI Connected to ground

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95 JTAGTDO Not used

96 JTAGTMS Connected to ground

97 TRST Connected to ground




101 DOUT O Digital audio signal output terminal (Not used)

102 TEST I Test terminal (Connected to ground)

103 TES1 I Test terminal (Connected to ground)


105 PLLVDD Power supply terminal (+1.8V)

106 PLLVSS Ground terminal

107 XVSS Ground terminal

108 XTAO O System clock output terminal (16.9344 MHz)109 XTAI I System clock input terminal (16.9344 MHz)

110 XVDD Power supply terminal (+1.8V)


112 AOUT1 O L-ch analog audio signal output terminal

113 VREFL O L-ch reference voltage output terminal



116 VREFR O R-ch reference voltage output terminal

117 AOUT2 O R-ch analog audio signal output terminal




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PANEL BOARD IC701 MB90802-108 (SYSTEM CONTROLLER)


1 P24 O Power relay control signal output

2 P25 O Amp control signal output

3 P26 O System reset signal output to the RF AMP

4 P27 O Control signal output to the PB/REC EQ AMP

5 P30/SO3 O Serial data output to the MP3 decoder

6 P31/SC3 O Serial data transfer clock signal output to the MP3 decoder

7 P32/SI3 I Serial data input

8 P33/TMCK O Latch pulse signal output to the RF AMP

9 P34/IC0 I Remote sensor signal input

10 P35/IC1 O Serial data latch pulse output to the MP3 decoder

11 P36/OCU0 O M-MUTE signal output to the MP3 decoder

12 P37/OCU1 O Data transfer request signal output to the MP3 decoder

13 X0A/P90 O Resonator output terminal (32.768kHz)14 X1A/P91 I Resonator input terminal (32.768kHz)

15 VCC Power supply terminal (+3.3V)


17 P40/LED0 O STANDBY LED control signal output

18 P41/LED1 I CD switch (SW3) input terminal



21 P44/LED4 O Loading motor control signal output

22 P45/LED5/TOT0 O Loading motor control signal output

23 P46/LED6/TOT1 O Elevator up/down motor control signal output

24 P47/LED7/TOT2 O Elevator up/down motor control signal output

25 P50/TIN0 I CD chuck switch (SW7) input terminal

26 P51/TIN1 I CD close switch (SW6) input terminal

27 P52/TIN2/PPG0 I CD stock switch (SW5) input terminal

28 P53/PPG1 I CD open switch (SW8) input terminal

29 P54/SI0 I Internal status (SENSE) input from the CD DSP

30 P55/SC0 O Serial data transfer clock signal output to the CD DSP

31 P56/SO0 O Serial data output to the CD DSP

32 AVCC Power supply terminal (+3.3V)

33 P57/SI1 I Data input from the the tuner

34 P76 O Oscillator control signal output to the CD DSP35 AVSS Ground terminal

36 P60/AN0 I Power detection signal input

37 P61/AN1 I Key AD input1

38 P62/AN2 I Key AD input2

39 P63/AN3 I Tuner tuned status signal input

40 P64/AN4 I Bias signal input from the bias oscillation circuit

41 P65/AN5/INT0 I Key AD input3

42 P66/AN6/INT1 I Power down detection signal input

43 P67/AN7/INT2 I Subcode data request signal input terminal


45 P70/AN8/INT3 Not used (open)

46 P71/AN9/SC1 O Back light LED control signal output

47 P72/AN10/SO1 I SUFFIX signal input (Connected to +3.3V)

48 P73/AN11/SI2 I Signal input from the volume encoder

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49 P74/SDA/SC2 I Data transfer request signal input from the MP3 decoder

50 P75/SCL/SO2 I Acknowledge signal input from the MP3 decoder

51 MD2 I Input pin for selecting operation mode (Connected to ground)

52 MD1 I Input pin for selecting operation mode (Connected to +3.3V)

53 MD0 I Input pin for selecting operation mode (Connected to +3.3V)

54 RSTX I System reset signal input terminal

55 V0/P80 O Tuner chip enable signal output to the tuner

56 V1/P81 O Clock signal output to the tuner

57 V2/P82 O Data output to the tuner

58 V3 I Reference power terminal of LCD controller/driver

59, 60 COM0, COM1 O Common signal output to the LCD

61, 62 P83/COM2, P84/COM3 O Common signal output to the LCD

63, 64 SEG0, SEG1 O Segment signal output to the LCD

65 VCC Power supply terminal (+3.3V)66 VSS Ground terminal

67 to 84 SEG2 to SEG19 O Segment signal output to the LCD

85 to 89 SEG20/P10 to SEG24/P14 O Segment signal output to the LCD

90 VCC Power supply terminal (+3.3V)


92 X1 I Resonator input terminal (4.19MHz)

93 X0 O Resonator output terminal (4.19MHz)



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5 2-649-130-11 PANEL, SIDE (R) (CND)

5 2-649-130-21 PANEL, SIDE (R) (US)

6 3-252-829-01 SCREW (B3), (+) BV TAPPING

M901 1-787-344-11 FAN, DC

#1 7-685-247-14 SCREW +KTP 3X10 TYPE2 NON-SLIT

SECTION 7

EXPLODED VIEWS

NOTE: -XX and -X mean standardized parts, so they

may have some difference from the original

one.

Items marked * are not stocked since they

are seldom required for routine service.

HCD-EC70

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