Sony HCDGV-8 Service manual

HCD-GV6/GV8

SERVICE MANUAL

Ver 1.0 2001.04

HCD-GV6/GV8 are the amplifier, CD player, tape deck and tuner section in LBT-GV6/GV8.

Dolby noise reduction manufactured under license from Dolby Laboratories Licensing Corporation. “DOLBY” and the double-D symbol ; are trademarks of Dolby Laboratories Licensing Corporation.

Photo: HCD-GV8

CD Section

TAPE Section

E Model

Model Name Using Similar Mechanism HCD-XG60 CD Mechanism Type CDM37L-5BD34L Base Unit Name BU-5BD34L Optical Pick-up Name KSS-213DH Model Name Using Similar Mechanism HCD-XG60 Tape T r ansport Mechanism Type TCM-230PWR42

Amplifier section

HCD-GV8

The following measured at AC 120/220/240V, 50 Hz DIN power output (rated) 240 + 240 watts

Continuous RMS power output (reference)

HCD-GV6

The following measured at AC 120/220/240V, 50 Hz DIN power output (rated) 150 + 150 watts

Continuous RMS power output (reference)

Inputs PHONO IN: (phono jacks) sensitivity 3 mV,

MIC1/2: (phone jack) sensitivity 1 mV,

VIDEO IN: (phono jack) sensitivity 250 mV,

GAME IN: (phono jack) sensitivity 250 mV,

MD IN: (phono jack) sensitivity 450 mV,

(4 ohms at 1 kHz, DIN) 320 + 320 watts

(4 ohms at 1 kHz, 10% THD)

(6 ohms at 1 kHz, DIN) 200 + 200 watts

(6 ohms at 1 kHz, 10% THD)

impedance 47 kilohms

impedance 10 kilohms

impedance 47 kilohms

SPECIFICATIONS

Outputs PHONES: (stereo phone jack) accepts headphones of 8

VIDEO OUT: (phono jack) voltage 250 mV

MD OUT: (phono jacks) voltage 250 mV

FRONT SPEAKER: HCD-GV8: accepts impedance of 4 to

HCD-GV6:

Video section

Inputs VIDEO IN (phono jack): 1 V p-p, 75 ohms GAME IN (phono jack): 1 V p-p, 75 ohms

Outputs VIDEO OUT (phono jack):1 V p-p, 75 ohms S-VIDEO OUT (4-pin/mini-DIN jack):

ohms or more

impedance 1 kilohm

16 ohms accepts impedance of 6 to

16 ohms

Y: 1 V p-p, unbalanced, Sync negative, C: 0.286 V p-p, load impedance 75 ohms

COMPACT DISC DECK RECEIVER

VIDEO CD/CD player section

System Compact disc and digital Laser Semiconductor laser

Wavelength: 780-790 nm Frequency response 2 Hz – 20 kHz (±0.5 dB) Signal-to-noise ratio More than 90 dB Dynamic range More than 90 dB Video color system format

CD OPTICAL DIGITAL OUT (Square optical connector jack, rear panel) Wavelength: 660 nm Output level –18 dBm

Tape player section

Recording system 4-track 2-channel stereo Frequency response 40 – 13,000 Hz (±3 dB), (DOLBY NR OFF)

audio system (λ=780nm), Emission

duration: continuous

NTSC, PAL

using Sony TYPE I cassette 40 – 14,000 Hz (±3 dB), using Sony TYPE II cassette

– Continued on next page –

9-873-826-11 Sony Corporation

2001D0500-1 Home Audio Company C 2001.4 Shinagawa Tec Service Manual Production Group

HCD-GV6/GV8

Tuner section

FM stereo, FM/AM superheterodyne tuner

FM tuner section

Tuning range 87.5 – 108.0 MHz Antenna FM lead antenna

Antenna terminals 75 ohm unbalanced Intermediate frequency 10.7 MHz

AM tuner section

Tuning range Middle Eastern and Philippine models:

Other models: 531 – 1,602 kHz

Antenna AM loop antenna Antenna terminals Intermediate frequency 450 kHz

General

Power requirements 120 V, 220 V or 230 – 240

Power consumption HCD-GV8 300 watts HCD-GV6 180 watts

Dimensions (w/h/d) Approx. 355 × 425 × 450 Mass :

HCD-GV8 Approx. 16.0 kg HCD-GV6 Approx. 15.5 kg

(50 kHz step)

531 – 1,602 kHz (with the interval set at 9 kHz)

(with the interval set at 9 kHz) 530 – 1,710 kHz (with the interval set at 10 kHz)

External antenna terminal

V AC, 50/60 Hz Adjustable with voltage selector

Notes on chip component replacement

• Never reuse a disconnected chip component.

• Notice that the minus side of a tantalum capacitor may be dam-

aged 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 the circuit board (within 3 times).

• Be careful not to apply force on the conductor when soldering or unsoldering.

CAUTION

Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure.

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

The following caution label is located inside the unit.

Design and specifications are subject to change without notice.

SAFETY-RELATED COMPONENT WARNING!!

COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINE WITH MARK 0 ON THE SCHEMATIC DIAGRAMS AND IN THE PARTS LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY.

HCD-GV6/GV8

1. SERVICING NOTES ................................................ 4

2. GENERAL

Location of Controls ....................................................... 5

Setting the Time .............................................................. 6

3. DISASSEMBLY

3-1. Disassembly Flow ........................................................... 7

3-2. Case ................................................................................. 7

3-3. Front Panel Section ......................................................... 8

3-4. Cover (TC), Tape Mechanism Deck

(TCM-230PWR42) ......................................................... 8

3-5. MAIN Board, Fan, D.C. (M901) .................................... 9

3-6. CD Mechanism Deck (CDM37L-5BD34L)................... 10

3-7. Base Unit (BU-5BD34L) ................................................ 11

3-8. Disc Table ........................................................................ 11

4. TEST MODE.............................................................. 12

5. MECHANICAL ADJUSTMENTS....................... 14

6. ELECTRICAL ADJUSTMENTS

Deck section .................................................................... 14

CD Section ...................................................................... 17

Video Section .................................................................. 17

7. DIAGRAMS

7-1. Block Diagram – CD SERVO Section – ....................... 18

7-2. Block Diagram – AUDIO/VIDEO CD Section –.......... 19

7-3. Block Diagram – TUNER/TAPE DECK Section – ...... 20

7-4. Block Diagram – MAIN Section – ................................ 21

7-5. Block Diagram – DISPLAY/KEY CONTROL/

POWER SUPPLY Section – ........................................... 22

7-6. Note for Printed Wiring Boards and

Schematic Diagrams ....................................................... 23

7-7. Printed Wiring Board – BD Board – ............................. 24

7-8. Schematic Diagram – BD Board – ................................ 25

7-9. Schematic Diagram – VIDEO Board (1/2) – ................ 26

7-10. Schematic Diagram – VIDEO Board (2/2) – ................ 27

7-11. Printed Wiring Board – VIDEO Board –....................... 28

7-12. Printed Wiring Boards – CD MOTOR Section – .......... 30

7-13. Schematic Diagram – CD MOTOR Section – .............. 31

7-14. Printed Wiring Board – A UDIO Board – ...................... 32

7-15. Schematic Diagram – AUDIO Board – ......................... 33

7-16. Printed Wiring Board – LEAF SW Board – .................. 34

7-17. Schematic Diagram – LEAF SW Board –..................... 34

7-18. Schematic Diagram – MAIN Board (1/3) – .................. 35

7-19. Schematic Diagram – MAIN Board (2/3) – .................. 36

7-20. Schematic Diagram – MAIN Board (3/3) – .................. 37

7-21. Printed Wiring Board – MAIN Board – ........................ 38

7-22. Printed Wiring Board – PA Board – .............................. 40

7-23. Schematic Diagram – PA Board – ................................. 41

7-24. Printed Wiring Boards – MIC/FRONT INPUT/

HEADPHONES Boards –............................................... 42

7-25. Schematic Diagram – MIC/FRONT INPUT/

HEADPHONES Boards – ............................................. 43

7-26. Printed Wiring Board – PANEL FL Board –................. 44

7-27. Schematic Diagram – PANEL FL Board – ................... 45

7-28. Printed Wiring Boards

– PANEL VR/ILLUMINATION Boards –..................... 46

7-29. Schematic Diagram

– PANEL VR/ILLUMINATION Boards –..................... 47

7-30. Printed Wiring Boards – TC-A/TC-B/CD-L/

CD-R (1)/CD-R (2) Boards – ......................................... 48

7-31. Schematic Diagram – TC-A/TC-B/CD-L/

CD-R (1)/CD-R (2) Boards – ......................................... 49

7-32. Printed Wiring Board – TRANSFORMER Section–.... 50

7-33. Schematic Diagram – TRANSFORMER Section–....... 50

7-34. IC Pin Function Description ........................................... 56

8. EXPLODED VIEWS

8-1. Case, Back Panel Section................................................ 66

8-2. Front Panel Section-1...................................................... 67

8-3. Front Panel Section-2...................................................... 68

8-4. Chassis Section ............................................................... 69

8-5. CD Mechanism Deck Section (CDM37L-5BD34L)...... 70

8-6. Base Unit Section (BU-5BD34L)................................... 71

8-7. Tape Mechanism Deck Section-1

(TCM-230PWR42) ......................................................... 72

8-8. Tape Mechanism Deck Section-2

(TCM-230PWR42) ......................................................... 73

9. ELECTRICAL PARTS LIST ............................... 74

HCD-GV6/GV8

SECTION 1

SERVICING NOTES

NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK OR BASE UNIT

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 CHECK

The 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 objectiv e lens.

LASER DIODE AND FOCUS SEARCH OPERATION CHECK

Carry out the “S curve check” in “CD section adjustment” and check that the S curve waveforms is output three times.

• MODEL IDENTIFICATION – Rear Panel –

SELF-DIAGNOSIS

This unit is equipped with a self-diagnosis function. The function is used for diagnosing the conditions of the circuits of the VIDEO board. The circuits can be determined if normal or abnormal by the lighting of D502 of the VIDEO board.

Lighting of D502

When lit : Operates normally Blinks repeatedly : The circuit may be faulty.

– VIDEO Board (Side A) –

IC505

PART No.

MODEL PART No.

HCD-GV6: Malaysia and

Singapore models HCD-GV6: Saudi Arabia model 4-232-090-1 HCD-GV8: Malaysia and

Singapore models HCD-GV6: Indonesia model 4-232-090-6

4-232-090-0

4-232-090-2

D502

[]

LOCATION OF CONTROLS – Front Panel –

SECTION 2

GENERAL

3456789

HCD-GV6/GV8

This section is extracted from instruction manual.

rf rd rs

ra r; el

ek ej

eg ef ed

ACTIVE wa (19) A EJECT Z/Z B EJECT wk (22) AUDIO L jack wd (31) AUDIO R jack ws (31) CD FLASH ed (14) CD LOOP ef (7,14) CD SYNC qj (23,24) DIRECT EQUALIZER 6 (26)

SALSA REGGAE SAMBA TANGO MOVIE POP ROCK JAZZ

DANCE GAME DIRECTION el (22,23,24,29) DISC SKIP w; (9~13,18,24) DISC 1~5 e; (10,12) DISPLA Y 4 (8,14) DOLBY NR el (22,23) ECHO LEVEL ek (28) EDIT es (24) ENTER wl (20) ENTER/NEXT qg (8,25,27,30,36 ) FLAT qg (26) FUNCTIONqa

(7,12,13,23,24,29,31,32)

GAME qs (29,31) GROOVE rd (26) H SPEED DUB qj (23) IR receptor 2 Jog dial (AMS./>) ql

(10~14,18,24) KARAOKE PON/MPX r; (28) KEY CONTROL 2/# qf (28) MIC 1 jack eh (28) MIC 2 jack eg (28) MIC LEVEL ej (28) NEXT wa (10,11,17,18) NON STOP ea (13) P.FILE qg (26,27) PHONES jack qk PLAY MODE w; ( 9,12,13,18,24) POWER SAVE/DEMO

(STANDBY) 3 (8) PREV wa (10,11,17,18) PUSH OPEN wj (9,10,12) REPEAT w; (10,12) RETURN wa (11) SELECT wa (11) SLEEP 8 (29) SPECTRUM ANALYZER 5 (28) STEREO/MONO wg (21)

qa qs qd qf

qh qj qk

ql w;

wswdwfwgwjwkwl

SUPER WOOFER rs ( 26,32) SUPER WOOFER MODE ra (26) SURROUND rf(23,26) TIMER SELECT 9 (25,30) TUNER/BAND wh(20,21,23) TUNER MEMORY wl (20) TUNING MODE wg (20,21) VIDEO jack wf (31) VOLUME control qd (21)

BUTTON DESCRIPTIONS

@/1 1

c/CLOCK SET 7

v/V/b/B q; z REC qh X qh m /M, AMS./>

(TAPE A/B) qhel

h/H qhel x qhw;el m /M (CD/VCD) w; HX w;

+/– wh

HCD-GV6/GV8

– Rear Panel –

1 ANTENNA terminal 2 PHONO IN jack 3 MD IN/OUT jack 4 VIDEO/AUDIO IN jack 5 VIDEO OUT jack 6 FRONT SPEAKER terminal 7 CD DIGITAL OUT OPTICAL terminal 8 SYSTEM SELECT switch 9 S VIDEO OUT jack 0 VOLTAGE SELECTOR switch

Remote control

wj wh wg

wd ws

wa w;

ql qk

qj qh

234

6 7

8 9 q; qa

qs qd

Setting the time

1 Turn on the system.

Press c/CLOCK SET.

When you set the time for the first time, skip to step 5.

3 Press v/V repeatedly to select “SET

CLOCK.”

4 Press ENTER/NEXT. 5 Press v/V repeatedly to set the hour. 6 Press ENTER/NEXT.

The minute indication flashes.

7 Press v/V repeatedly to set the minute. 8 Press ENTER/NEXT.

The clock starts working.

Tip

If you’ve made a mistake or want to change the time, start over from step 2.

Note

The clock settings are canceled when you disconnect the power cord or if a power failure occurs.

ACTIVE wa (19) CHECK wh (13) CLEAR wf (13,17) DECK A nN qs (22) DECK B nN qs (22) DISPLAY 2 (8,14) D.SKIP wg (9~13,17,18,24) EDIT ws (24) FILE SELECT ON/OFF q; (26) FILE SELECT v/V q; (14) FLASH qd (14) FUNCTION w;

(7,12,13,23,24,29,31,32) KEY CONTROL LOOP qd (14) MD N qj MD X qj MD x qj NEXT, +, > qk

(10,11,12,17,18,21,22) Numeric buttons 8 (10,11,16~18) ON SCREEN 3 (15,16) PREV, –, . qk

(10,11,12,17,18,21,22) REPEAT wd (10,12)

2/# qh (28)

SELECT CD N qs

(9,10,12,16~18) SLEEP wj (29) SPECIAL MENU 9 (16~18) SURROUND qf (23,26) TUNER/BAND ql(20,21,23) TV CH +/– 7 (8) TV/VIDEO 1 (8) TV VOL +/– 6 (8) TV @/1 4 (8) VOL +/– qg (21)

BUTTON DESCRIPTIONS

@/1 5 O RETURN qa x qs m/M qs X qs

• This set can be disassembled in the order shown below.

)

3-1. DISASSEMBLY FLOW

SET

3-2. CASE

(Page 7)

3-3. FRONT PANEL SECTION

(Page 8)

HCD-GV6/GV8

SECTION 3

DISASSEMBLY

3-4. COVER (TC),

TAPE MECHANISM DECK (TCM-230PWR42) (Page 8)

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

3-5. MAIN BOARD,

FAN, D.C. (M901) (Page 9)

3-2. CASE

case

3-6. CD MECHANISM DECK

(CDM37L-5BD34L) (Page 10)

3-7. BASE UNIT

(BU-5BD34L) (Page 11)

five screws (BVTT3

3-8. DISC T ABLE

(Page 11)

three screws (CASE3 TP2)

two screws (BVTP3

HCD-GV6/GV8

)

3-3. FRONT PANEL SECTION

lug

two screws (BVTP3

wire (flat type) (15 core) (CN303)

wire (flat type) (17 core) (CN304)

wire (flat type) (13 core) (CN431)

two connectors (CN452, 702)

screw (BVTP3

two lugs

front panel section

four screws (BVTP3

claw

3-4. COVER (TC), TAPE MECHANISM DECK (TCM-230PWR42)

two screws (BVTP3

screw (BVTP3

wire (flat type) (17 core) (CN1001)

connector (CN806)

wire (flat type) (15 core (CN601)

two screws (BVTP3

five claws

tape mechanism deck (TCM-230PWR42)

cover (TC)

3-5. MAIN BOARD, FAN, D.C. (M901)

)

back panel

wire (flat type) (19 core) (CN411)

fan, D.C. (M901)

wire (flat type) (13 core) (CN441)

eight screws

(BVTP3

three screws (BVTP3

HCD-GV6/GV8

screw (BVTP3

three screws (BVTP3

two screws (BVTP3

connector (CN412)

two connectors (CN901, 902)

connector (CN903

MAIN board

two screws

(BVTP3

HCD-GV6/GV8

3-6. CD MECHANISM DECK (CDM37L-5BD34L)

wire (flat type)

(19 core) (CN411)

three screws (BVTP3

connector (CN412)

two screws (BVTP3

three screws (BVTP3

Open the cable clamp.

CD mechanism deck

(CDM37L-5BD34L)

five screws (BVTP3 × 8)

two screws (BVTP3

3-7. BASE UNIT (BU-5BD34L)

1 two screws

(BVTP3 × 8)

2 two brackets (BU)

3 step screw

4 disc table

base unit (BU-5BD34L)

HCD-GV6/GV8

3-8. DISC TABLE

Note: When the disc table is installed, adjust the positions of roller cam

and mark B as shown in the figure, then set to the groove of disc table.

boss

BU fitting scre

HCD-GV6/GV8

SECTION 4

TEST MODE

[MC Cold Reset]

• The cold reset clears all data including preset data stored in the RAM to initial conditions. Execute this mode when returning the set to the customer.

Procedure:

1. Turn the power ON or set to the DEMO mode.

2. Press three buttons of [ /CLOCK SET], [ENTER/NEXT], and

?/1 simultaneously.

3. The set is reset, and displays “COLD RESET”, then becomes

DEMO mode.

[MC Hot Reset]

• This mode resets the set with the preset data kept stored in the memory. The hot reset mode functions same as if the power cord is plugged in and out.

Procedure:

1. Turn the power ON or set to the DEMO mode.

2. Press three buttons of [ /CLOCK SET], [ENTER/NEXT],

and [DISC 1] simultaneously.

3. The set is reset, and becomes standby state.

[Change-over the AM Tuning Interval] (EXCEPT Saudi Arabia model)

• The AM tuning interval can be changed over 9 kHz or 10 kHz.

Procedure:

1. Press the ?/1 button to turn the power ON.

2. Select the function “TUNER”, and press the [TUNER/BAND]

button to select the BAND “AM”.

3. Press the ?/1 button to turn the power OFF.

4. Press the [ENTER/NEXT] and ?/1 buttons simultaneously,

and the display on the fluorescent indicator tube changes to “AM 9 K STEP” or “AM 10 K STEP”, and thus the tuning interval is changed over.

[CD Delivery Mode]

• This mode moves the optical pick-up to the position durable to vibration. Use this mode when returning the set to the customer after repair.

Procedure:

1. Press the ?/1 button to turn the power ON.

2. Press the [LOOP] and ?/1 buttons simultaneously.

3. A message “LOCK” is displayed on the fluorescent indicator

tube, and the CD delivery mode is set.

[LED and Fluorescent Indicator Tube All Lit, Key Check Mode]

Procedure:

1. Press three buttons of [ /CLOCK SET], [ENTER/NEXT],

and [DISC 2] simultaneously.

2. LEDs and fluorescent indicator tube are all turned on.

Press the [DISC 2] button, and the key check mode is activated.

3. In the key check mode, the fluorescent indicator tube displays

“K 0 J0 V0”. Each time a button is pressed, “K” value increases. However , once a button is pressed, it is no longer tak en into account. “J” value increases like 1, 2, 3 ... if turn the JOG dial clockwise, or it decreases like 0, 9, 8 ... if turn the JOG dial counterclockwise. “V” value increases like 1, 2, 3 ... if turn the [VOLUME] dial clockwise, or it decreases like 0, 9, 8 ... if turn the JOG dial counterclockwise.

4. To release from this mode, press three buttons in the same

manner as step 1, or disconnect the power cord.

HCD-GV6/GV8

[Aging Mode]

This mode can be used for operation check of tape deck section. Tape deck section work in parallel.

• If an error occurred: The aging operation stops and display then status.

• If no error occurs: The aging operation continues repeatedly.

Procedure:

1. Load the tapes into the decks A and B respectively.

2. Press the [FUNCTION] button to select the function “CD”.

3. Press the [PLAY MODE] button to set the “ALL DISCS” mode,

and press the [REPEAT] button to “REPEAT” off.

4. Press three buttons of [ /CLOCK SET], [ENTER/NEXT],

and [DISC 4] simultaneously.

5. The aging mode is activated, if the indicator of disc tray num-

ber on the fluorescent indicator tube is blinking.

6. To release from the aging mode, press the ?/1 button to turn

the power OFF and operate the cold reset. (Refer to the “MC Cold Reset”)

1. Display at the Aging Mode

• Display operating state of tape deck section alternately.

• If an error occurred, stop display.

2. Tape Deck Section

• The sequence during the aging mode is following as below.

• If an error occurred, stop display that step.

Aging mode sequence (Tape deck section) :

Rewind the tape A and B

“TAPE A AG-1”

Shut off

FWD play the tape A

“TAPE A AG-2”

2 minutes

Fast forward the tape A

“TAPE A AG-3”

Shut off or 20 seconds

REV play the tape A

“TAPE A AG-4”

2 minutes

Rewind the tape A

“TAPE A AG-5”

Shut off

FWD play the tape B

“TAPE B AG-2”

2 minutes

Fast forward the tape B

“TAPE B AG-3”

Shut off or 20 seconds

REV play the tape B

“TAPE B AG-4”

2 minutes

Rewind the tape B

“TAPE B AG-5”

Shut off

Note: “TAPE * AG-*” is display of each step.

HCD-GV6/GV8

SECTION 5

MECHANICAL ADJUSTMENTS

SECTION 6

ELECTRICAL ADJUSTMENTS

Precaution

1. Clean the following parts with a denatured alcohol-moistened swab:

record/playback heads pinch rollers erase head rubber belts capstan idlers

2. Demagnetize the record/playback head with a head demagnetizer.

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

4. After the adjustments, apply suitable locking compound to the parts adjusted.

5. The adjustments should be performed with the rated power supply voltage unless otherwise noted.

Torque Measurement

Mode Torque Meter Meter Reading

FWD CQ-102C (31 to 71 g•cm)

FWD back tension

REV CQ-102RC (31 to 71 g•cm)

REV back tension

FF/REW CQ-201B (71 to 143 g•cm)

FWD tension CQ-403A (100 g or more)

REV tension CQ-403A (100 g or more)

CQ-102C (2 to 6 g•cm)

CQ-102RC (2 to 6 g•cm)

3.1 to 6.96 mN•m

(0.43 – 0.98 oz•inch)

0.20 to 0.58 mN•m

(0.03 – 0.08 oz•inch)

3.1 to 6.96 mN•m

(0.43 – 0.98 oz • inch)

0.20 to 0.58 mN•m

(0.03 – 0.08 oz • inch)

6.97 to 14.02 mN•m

(0.99 – 1.99 oz • inch)

9.80 mN•m

(3.53 oz or more)

9.80 mN•m

(3.53 oz or more)

DECK SECTION

0 dB = 0.775 V

Precaution

1. Demagnetize the record/playback head with a head demagnetizer.

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

3. After the adjustments, apply suitable locking compound to the parts adjust.

4. The adjustments should be performed with the rated power supply voltage unless otherwise noted.

5. The adjustments should be performed in the order given in this service manual. (As a general rule, playback circuit adjustment should be completed before performing recording circuit adjustment.)

6. The adjustments should be performed for both L-CH and RCH.

7. Switches and controls should be set as follows unless otherwise specified.

8. Set to the DOLBY NR OFF.

9. Set to the test mode. (1) Press the ?/1 button to turn the power ON. (2) Select the function “TAPE A or B”. (3) Press the button of [ /CLOCK SET], [ENTER/NEXT],

and [DISC 3] simultaneously , to set the tape deck test mode and displays “TEST MODE” on the fluorescent indicator tube.

(4) To release from the test mode, press the ?/1 button.

• Test Tape

Tape Signal Used for

P-4-A100 10 kHz, – 10 dB Azimuth Adjustment

WS-48B 3 kHz, 0 dB Tape Speed Adjustment

P-4-L300 315 Hz, 0 dB Playback Level Adjustment

HCD-GV6/GV8

–

set

test tape WS-48B (3 kHz, 0 dB)

MAIN board MD OUT jack (J701) L-CH, R-CH

frequency counter

Record/Playback Head Azimuth Adjustment

DECK A DECK B

Note: Perform this adjustments for both decks

Procedure:

1. Mode: Playback (FWD)

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

test tape P-4-A100 (10 kHz, – 10 dB)

MAIN board MD OUT jack (J701) L-CH, R-CH

set

level mete

–

do not match for L-CH and R-CH, turn the adjustment screw so that outputs match within 1dB of peak.

Output level

within 1dB

L-CH peak

Adjustment Location:Playback Head (Deck A).

Record/Playback/Erase Head (Deck B).

forward

reverse

Tape Speed Adjustment DECK B

Mode: Playback

R-CH

Screw position

peak

L-CH peak

R-CH peak

Screw position

3. Mode: Playback

MAIN board test tape P-4-A100 (10 kHz, – 10 dB)

L-CH

set

R-CH

in phase 45 ° 90 ° 135 ° 180°

MD OUT jack (J701)

L-CH

R-CH

waveform of oscilloscope

good

oscilloscope

wrong

4. Repeat step 1 to 3 in playback (REV) mode.

5. After the adjustments, apply suitable locking compound to the parts adjusted.

1. Insert the WS-48B into the deck B.

2. Press the H button on the deck B.

3. Press the [H SPEED DUB] button in playback mode. Then at HIGH speed mode.

4. Adjust RV1001 on the LEAF SW board do that frequency counter reads 6,000 ± 180 Hz.

5. Press the [H SPEED DUB] button. Then back to NORMAL speed mode.

6. Adjust RV1002 on the LEAF SW board so that frequency counter reads 3,000 ± 90 Hz.

Adjustment Location: LEAF SW board Sample value of Wow and Flutter: 0.3% or less W.RMS (JIS)

(WS-48B)

Playback Level Adjustment DECK A DECK B

Procedure:

Mode: Playback

test tape P-4-L300 (315 Hz, 0 dB)

set

MAIN board MD OUT jack (J701) L-CH

level mete

+ –

Deck A is RV311 (L-CH), Deck B is RV301 (L-CH) so that adjustment within specification values as follows.

Specification Values:

J701 PB level: 301.5 to 338.3 mV (– 8.2 to – 7.2 dB) level difference between the channels: within ± 0.5 dB

Adjustment Location: AUDIO board

HCD-GV6/GV8

REC Bias Adjustment DECK B

Procedure:

1. Mode: Record FUNCTION: VIDEO

MAIN board VIDEO AUDIO IN jack (J701) L-CH, R-CH



50 mV (– 23.8 dB)

 

600

Ω

set

blank tape CN-123

AF OSC

1) 315 Hz

2) 10 kHz

attenuator

2. Mode: Playback

recorded portion

set

MAIN board MD OUT jack (J701) L-CH, R-CH

level mete

–

3. Confirm playback the signal recorded in step 1 become specification values as follows. If these values are out of specification v alues, adjust the R V341 (L-CH) and RV441 (R-CH) on the AUDIO board to repeat steps 1and 2.

Specification values: Playback output of 315 Hz to playback

output of 10 kHz: ± 0.5 dB

Adjustment Location: AUDIO board

Specification values:

J701 PB level: 47.2 to 53.0 mV (– 24.3 to – 23.3 dB)

Adjustment Location: MAIN board

– MAIN BOARD (Conductor Side) –

VIDEO

AUDIO IN

L/R

J701

REC LEVEL



IC301

RV351

R-CH

MD OUT

RV301

L-CH

L/R

        

– AUDIO BOARD (Component Side) –

RV441

RV301

PB LEVEL (L)

– DECK B –

IC602

RV341



REC BIAS

CN601

RV311

PB LEVEL (L)

– DECK A –

REC Level Adjustment DECK B

Procedure:

1. Mode: Record FUNCTION: VIDEO

MAIN board VIDEO AUDIO IN jack (J701) L-CH, R-CH

AF OSC

315 Hz, 50 mV (– 23.8 dB)

600

attenuator

Ω

blank tape CS-123

set

2. Mode: Playback

recorded portion

set

MAIN board MD OUT jack (J701) L-CH, R-CH

level mete

–

3. Confirm playback the signal recorded in step 1 become specification values as follows. If these values are out of specification v alues, adjust the R V301 (L-CH) and R V351 (R-CH) on the MAIN board to repeat steps 1 and 2.

– LEAF SW BOARD (Component Side) –

TAPE SPEED



(NORMAL) (HIGH)

RV1002



RV1001

CN1001

HCD-GV6/GV8

–

TP508 (27 MHz)

VIDEO board

frequency counter

IC505

IC507

TP508

(27 MHz)

CT503 VIDEO

Frequency

Adjustment

– VIDEO BOARD (Side A) –

)

CD SECTION

Note:

1. CD Block is basically designed to operate without adjustment. Therefore, check each item in order given.

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

3. Use an oscilloscope with more than 10 MΩ impedance.

4. Clean the object lens by an applicator with neutral detergent when the signal level is low than specified value with the following checks.

S-Curve Check

oscilloscop

BD board

TP (FE) TP (VC)

Procedure:

1. Connect oscilloscope to TP (FE) and TP (VC).

2. Connect between TP (FE1) and TP (VC) by lead wire.

3. Connect between TP (AGCCON) and TP (GND) by lead wire.

4. Turn the power ON.

5. Load a disc (YEDS-18) and actuate the focus search. (In con-

sequence of open and close the disc tray, actuate the focus search)

6. Cofirm that the oscilloscope waveform (S-curve) is symmetri-

cal between A and B. And confirm peak to peak level within 4 ± 1 Vp-p.

S-curve waveform

–

symmetry

E-F Balance (1 Track Jump) Check

oscilloscope

(DC range)

BD board

TP (TE) TP (VC)

–

Procedure :

1. Connect oscilloscpe to TP (TE) and TP (VC).

2. Turn the power ON.

3. Load a disc (YEDS-18) and playback the number five track.

4. Press the H X button. (Becomes the 1 track jump mode)

5. Confirm that the level B and A (DC voltage) on the oscilloscope waveform.

1 track jump waveform

level = 1.3 ± 0.6 Vp-p symmetry

Specified level: × 100 = less than ± 22%

A B

center of waveform

A (DC voltage

6. After check, remove the lead wire connected in step 1.

VIDEO SECTION

Frequency Adjustment

Connection:

Procedure:

1. Connect the frequency counter to TP508 (27 MHz) on VIDEO board.

2. Turn the power ON.

3. Press the [FUNCTION] button to select the CD.

4. Adjust CT503 on the VIDEO board so that the frequency counter reading 27.0 MHz ± 80 Hz at stop status.

Adjustment Location:

7. After check, remove the lead wire connected in step 2 and 3.

Note: • Try to measure several times to make sure than the ratio of A : B

or B : A is more than 10 : 7.

• Take sweep time as long as possible and light up the brightness to obtain best waveform.

RF Level Check

Procedure:

1. Connect oscilloscope to TP (RF) and TP (VC).

2. Connect between TP (AGCCON) and TP (GND) by lead wire.

3. Turn the power ON.

4. Load a disc (YEDS-18) and press the H X button to play.

5. Confirm that the oscilloscope waveform is clear and check RF signal level is correct or not.

6. After check, remove the lead wire connected in step 2.

Note: Clear RF signal waveform means that the shape “ ” can be clearly

distinguished at the center of the waveform.

BD board

TP (RF) TP (VC)

oscilloscop

(AC range)

within 4 ± 1 Vp-p

–

VOLT/DIV: 200 mV TIME/DIV: 500 ns (with the 10: 1 probe in use)

level:

1.45 ± 0.3 Vp-p

Checking Location:

– BD BOARD (Side B) –

TP (AGCCON)

TP (RF)

IC102

TP (TE)

TP (FE)

IC103

TP (VC)

TP (GND)

TP (FE1)

IC101

1717

HCD-GV6/GV8

7-1. BLOCK DIAGRAM – CD SERVO Section –

DETECTOR

OPTICAL PICK-UP

BLOCK

(KSS-213DH)

LASER DIODE

I-V AMP

(SPINDLE)

M101

(SLED)

M102

CD D+5V

AUTOMATIC

POWER CONTROL

Q101

FOCUS/TRACKING ERROR AMP

F I-V AMP

E I-V AMP

FOCUS/TRACKING COIL DRIVE,

SPINDLE/SLED MOTOR DRIVE

IC102

CH4OUTF

CH4OUTR

CH3OUTF

CH3OUTR

MOTOR

DRIVE

MOTOR

DRIVE

SECTION 7

DIAGRAMS

RF AMP,

IC103

CH4SIN

CH3FIN

CH3RIN

RF EQ

AMP

FOCUS

ERROR AMP

TRACKING

ERROR AMP

APC PD

AMP

HOLD SW

SUMMING

AMP

APC LD

AMP

RFO

LDON

DIGITAL SERVO

CTL2

PROCESSOR

IC101 (2/2)

40 41 39 43

A/D

CONVERTER

DIGITAL SIGNAL PROCESSOR

RFDC

FILTER

IC101 (1/2)

RFAC

ASYMMETRY CORRECTOR

ASYI

ASYO

DIGITAL

CLV

PROCESSOR

MDP

25 76 77

53 55

PCO

FILO

DIGITAL PLL

TO SERVO AUTO

SEQUENCER

DATA

CLOK

3 5 4 1 18 36 37 10

DSP CLK

DSP DATA

LDON

28 2

125254

FILI

CLTV

XPCK

CPU INTERFACE

SCOR

SENSE

XLAT

SENSE

DSP LATCH

SENSE CLK

16 69

C4M

EFM

DEMODULATOR

32K

RAM

INTERNAL BUS

SUBCODE

PROCESSOR

SQCK

SQSO

EXCK

SBSO

79 801574 6 5 10 111368 3

SCOR

SUBQ CLK

SUBQ DATA

WFCK

XUGF

GFS

CD MECHANISM CONTROLLER

IC502 (1/2)

XRST

T-SENS

ENC3/UP-SW

EMPH

CORRECTOR

ERROR

DISC TABLE

SENSOR

IC202

S201

(UP)

CTL2

CTL1

XTSL

CLOCK

GENERATOR

D/A

DIGITAL

INTERFACE

MUTE

DSP MUTE

XRESET

XTAO

XTAI

PCMD

BCK LRCK C2PO

WDCK

DOUT

DIGITAL

OUT

MD2

XRST

CTRL1 CTRL2

DEVICE RESET

66 67 65 14 17

11 27

OSC

BUFFER

IC104

DATA

BCK LRCK C2PO

CD D+5V

CTL1 CTL2

OPTICAL

TRANSCEIVER

IC781

MCLK

33.8MHz

DATA, BCK,

LRCK, C2PO

CD DIGITAL OUT

RESET

OPTICAL

(Page 19)

2-AXIS DEVICE

(TRACKING)

(FOCUS)

CH2OUTF

CH2OUTR

CH1OUTF

CH1OUTR

COIL

DRIVE

COIL

DRIVE

MUTE

CH2FIN

CH2RIN

CH1FIN

CH1RIN

SFDR

SRDR

TFDR

TRDR

FFDR

FRDR

PWM GENERATOR

FOCUS/TRACKING/SLED

FOCUS/

TRACKING/SLED

SERVO DSP

SSTP

CD D+5V

MIRR, DFCT, FOK DETECTOR

SERVO

INTERFACE

SERVO AUTO

SEQUENCER

TO CPU INTERFACE

S101

(LIMIT)

ON: When the optical pick-up is inner position.

FOK

MIRR

DFCT

COUT

SCLK

22 20 21

SYSTEM CONTROLLER

ENC2/DISC-LED

IC501 (1/4)

TBL-L

TBL-R

LED DRIVE

Q201

TABLE MOTOR DRIVER

IN1

IN2

IC201

MOTOR

DRIVE

D201

(DISC No.)

OUT1

OUT2

M201

(TABLE)

• SIGNAL PATH

: CD PLAY (ANALOG OUT)

: CD PLAY (DIGITAL OUT)

1818

7-2. BLOCK DIAGRAM – AUDIO/VIDEO CD Section –

MCLK 33.8MHz

(Page 18)

DATA, BCK, LRCK, C2PO

DATA

BCK

LRCK

C2PO

LEVEL SHIFT IC501

MPEG VIDEO/AUDIO DECODER,

VIDEO SIGNAL PROCESSOR

IC505

CD-DATA

CD-BCK

3 5

CD-LRCK

CD-C2PO

CD-ROM

INTERFACE

CIRCUIT

MA0 – MA10

58 – 56, 54, 52 – 50, 48, 46 – 44 10 – 15, 17, 19, 21, 23 – 29

MPEG

SYSTEM

DECODER

D-RAM/ROM INTERFACE

MD0 – MD15

MPEG

AUDIO

DECODER

MPEG

VIDEO

DECODER

PROCESS

CIRCUIT

RAS0

MWE

MCE

38 42 40 60

VIDEO

CAS

AUDIO

INTERFACE

CIRCUIT

PGIO2/VSYNC/CSYNC

HRDY

RESET

113

DA-DATA

DA-BCK

DA-LRCK

DA-XCLK

Y-OUT

C-OUT

VCK-IN

CPU INTERFACE

HSEL

HD-OUT

HD-IN

HINT

114 121

112

119

117

HCK

HCD-GV6/GV8

DIGITAL FILTER, D/A CONVERTER

IC509

XT1

DIGITAL FILTER,

NOISE SHAPER CIRCUIT

D/A

CONVERTER

MODE

CONTROL

9 724 1

R-CH

CD-L

(Page 21)

LOW-PASS

FILER

VOUTL

VOUTR

LOW-PASS

FILER IC101

• R-ch is omitted due to same as L-ch.

RSTB

• SIGNAL PATH

: CD PLAY (AUDIO)

: CD PLAY (VIDEO)

RESET

(Page 18)

CT503

(27MHz)

DATA

BCK

LRCK

768FSO

384FSO

MCKO

INPUT

INTERFACE

CIRCUIT

TIMING CONTROL/

CLOCK GENERATOR

XT2

X503

27MHz

110 111 108

106

OSC

BUFFER

IC504

VIDEO FREQUENCY

16 – 19, 22 – 26

D-RAM

IC507

(Page 22)

A0 – A8

DATA, CLK

UCAS

LCAS

14 132928

RAS

DQ1 – DQ16

D0 – D15

ADDRESS BUS

DATA BUS

12 – 5, 27, 26, 23

PROGRAM ROM

A0 – A10

IC506

A0 – A10

13 – 15, 17 – 212 – 5, 7 – 10, 31 – 34, 36 – 39

NTSC

AUTO

D0 – D7

O0 – O7

PAL

25, 4, 28, 29, 3, 2, 30

S501

SYSTEM SELECT

(SELF DIAGNOSIS)

D0 – D15

D8 – D14

A11 – A17

D502

CLK

DATA

NT/PAL

TEST LED

CLK

DATA

2120

DATA1I

DATA1O

CL680 SEL

CL680 HINT

CL680 HRDY

CL680 RESET

CD MECHANISM CONTROLLER

IC502 (2/2)

BUFFER

Q502

DATA

CLK

VIDEO

BUFFER

Q303

XOUT

XIN

VIDEO

BUFFER

Q301

VIDEO

BUFFER

Q304

B.P.F.

CLK1

BUS

DF LATCH

SHARPNESS

VMUTE

3331

SHARPNESS

FILTER

Q302

SHARPNESS

CONTROL SWITCH

Q306

X501

10MHz

VIDEO

BUFFER

Q307

VIDEO

BUFFER

Q308

VIDEO SELECT

SWITCH,

VIDEO AMP

IC191

Y/C MIX

Q310

IN1

IN3 VOUT IN4

VIDEO AMP IC401 (1/2)

VIDEO AMP IC401 (2/2)

LOGIC

CTLA

CTLB

3 52

ABC

VIDEO MUTING

CTLC

VIDEO MUTING

Q454

Q453

106

J301

S VIDEO OUT

J804 (1/2)

J702

A, B, C

GAME INPUT VIDEO

VIDEO

VIDEO IN

VIDEO OUT

(Page 21)

1919

HCD-GV6/GV8

7-3. BLOCK DIAGRAM – TUNER/TAPE DECK Section –

HP101

(PLAYBACK)

L-CH

R-CH

HRPE101 (1/2)

(RECORD/PLAYBACK)

L-CH

R-CH

DECK PROCESS,

DECK A/B SELECT, PB/REC EQ AMP,

DOLBY NR AMP, ALC, AMS

RV311

PB LEVEL (L)

(DECK A)

PB EQ AMP

(DECK A)

IC611 (2/2)

PB EQ AMP

(DECK A)

IC611 (1/2)

RV301

PB LEVEL (L)

(DECK B)

PB EQ AMP

(DECK B)

IC601 (2/2)

PB EQ AMP

(DECK B)

IC601 (1/2)

REC/PB SWITCHING

IC602

R-CH

A IN (L)

B IN (L)

A IN (R)

B IN (R)

BIAS (N)

BIAS (C)

BIAS (M)

S1004

(DECK A 120/70)

S1008

(DECK B 120/70)

IC301

R-CH

BIAS

CONTROL

CIRCUIT

B NORM/CROM

ALC ON/OFF

A 120/70

1516182022 23242517

NORM/HIGH

PB A/B

120

R-CH

NR ON/OFF

BIAS ON/OFF

RM ON/OFF

L.P.F.

BUFFER

AMS

CIRCUIT

REC/PB/PASS

LM ON/OFF

MAOUT

MSIN

MSOUT

R IN (L)

ALC (L)

DOLBY PASS

ALC

R OUT (L)

35 34

DOLBY NR

AMP

CIRCUIT

ALC

IN (L)

REC OUT (L)

RV301

REC LEVEL (L)

(DECK B)

EQ IN (L)

REC

EQ AMP

PB OUT (L)

EQ OUT

(L)

PB-L

REC-L

(Page 21)

• R-ch is omitted due to same as L-ch.

• SIGNAL PATH

: TUNER (FM/AM)

: PLAYBACK (DECK A) : PLAYBACK (DECK B) : RECORD

RV441

REC BIAS (R)

(DECK B)

HRPE101 (2/2)

(ERASE)

75Ω

R-CH

ANTENNA

RV341

REC BIAS (L)

(DECK B)

BIAS OSC

T621

FM/AM TUNER UNIT

FM ANT

AM ANT

BIAS OSC

Q621, 622

ST-R

ST-MUTE

STEREO

TUNED

ST-DIN

ST-DOUT

ST-CLK

ST-CE

REC BIAS

SWITCH

Q623

ST-L

C331, L331

BIAS TRAP

R-CH

ST-MUTE STEREO TUNED

ST-DIN ST-DOUT ST-CLK ST-CE

A+7V

D+5V

(UNSW)

100

TC-RELAY

(DECK A PLAY)

8584838281 807978

ALC

PB-A/B

EQ-H/N

A-PLAY-SW

S1001

S1002

(DECK B PLAY)

BIAS

REC-MUTE

B-PLAY-SW

TC-MUTE

R/PB/PAS

NR-ON/OFF

(DECK A HALF)

S1003

AMS-IN

A-HALF

ROTATION

DETECT SENSOR

(DECK A)

IC1001

A-SHUT

S1006

(DECK B HALF)

S1005

(DECK A REC)

S1009

(DECK B REC)

ROTATION

DETECT SENSOR

(DECK B)

IC1002

B-SHUT

B-HALF

TRIGGER PLUNGER

PLUNGER DRIVE

SYSTEM CONTROLLER

IC501 (2/4)

DECK A

TRIGGER

(DECK A)

Q333, 334

A-TRG

TRIGGER PLUNGER

DECK B

TRIGGER

PLUNGER DRIVE

(DECK B)

Q331, 332

B-TRG

ST-DIN

TUNED

STEREO

ST-MUTE

49 50 51 54 53 55 52

ST-DIN

TUNED

STEREO

ST-MUTE

ST-CLK

ST-DOUT

ST-CLK

ST-DOUT

ST-CE

Q335

CAP-M-H/L

RV1001

TAPE SPEED

(HIGH)

CAPM-CNT2

CAPSTAN MOTOR

CONTROL SWITCH

Q1001

MOTOR DRIVE

RV1002

TAPE SPEED

(NORMAL)

CAPSTAN

Q336, 339

(CAPSTAN)

CT-L

(Page 21)

2020

7-4. BLOCK DIAGRAM – MAIN Section –

DIGITAL

ECHO

IC851

RV601

ECHO LEVEL

HCD-GV6/GV8

REC-L

(Page 20)

J802

MIC 2

J801 MIC 1

J701 (1/2)

J804 (2/2)

CD-L

PB-L

ST-L

R-CH

A, B, C

(Page 19)

(Page 20)

MD IN

PHONO

VIDEO

AUDIO IN

GAME INPUT AUDIO

(Page 19)

• R-ch is omitted due to same as L-ch.

• SIGNAL PATH

: TUNER (FM/AM)

: CD PLAY : TAPE PLAY : RECORD : MIC INPUT

PHONO EQ AMP

IC601

FUNCTION SELECT

SWITCH

IC181

10 9

MIC AMP

IC850 (1/2)

RV602

MIC LEVEL

INPUT SELECT SWITCH,

GRAPHIC EQUALIZER CONTROL,

ELECTRICAL VOLUME

IN D2

IN C2

IN B2

IN E2

IN A2

IN F2

IC101

INPUT SELECT SWITCH

R-CH

MIC AMP

IC850 (2/2)

SOUND

CONTROL

CIRCUIT

KEY IN2

KEY IN1

60 5

2 58 57

MIC IN

REC A2

L+R

KEY OUT 1 KEY OUT 2

GRAPHIC

EQUALIZER

CONTROL

CIRCUIT

R-CH

REC B2

F OUT2

42 41

R-CH

SUPER

WOOFER

BUF

OUT2

FEED BACK

SWITCH

Q112

R-CH

D803

VOL IN2

COMMAND

VOLUME

CONTROL

CPU

INTERFACE

DATA

CLOCK

LATCH

BASS BOOST

CONTROL

CIRCUIT

BB B2,

BB A2

38, 39

BUF IN2

373233

DBFB CONTROL

SWITCH

Q111

493-DATA

XC-OUT

X501

32.768kHz

X502

16MHz

XC-IN

X-OUT

X-IN

FUNC SEL0

FUNC SEL1

CBA

V MUTE

SW-MODE

SYSTEM CONTROLLER

IC501 (3/4)

STK-POWER

LINE-MUTE

493-CLK 493-LAT

DBFB-H/L

HP MUTE

AC-CUT

RESET

PROTECT

F-RELAY

HP-IN

47 48 38

D501

D534

PROTECT

SWITCH

Q804

RESET

SWITCH

Q801

D807

R-CH

MUTING CONTROL

SWITCH

Q802, 803

MUTING

Q113

POWER AMP

STANDBY SWITCH

Q803, 804, 834

EVER +5V

RESET SIGNAL

GENERATOR

IC801

R-CH

TH831

TEMPERATURE

DETECT SWITCH

OVER LOAD

DC DETECT

SWITCH

Q433, 434

Q831, 832

DETECT

Q801, 851

D401

OVER LOAD

DETECT SWITCH

Q432

PROTECT SWITCH

Q439

BASS WOOFER

CONTROL SWITCH

Q115

R-CH

OVER LOAD

DETECT SWITCH

Q437

FRONT SPEAKER PROTECT

RELAY DRIVE

R-CH

Q401, 402

R-CH

MUTING CONTROL

SWITCH

Q833

PROTECT SWITCH

Q431

R-CH

–1

–2

HEADPHONE

MUTING

Q805, 855

RY401

SPEANA

R-CH

FAN MOTOR

DRIVE

Q961, 962

FRONT SPEAKER

RESET

J701 (2/2)

M901 (FAN)

TM401

IMPEDANCE

USE 4 – 16Ω

–

J803

PHONES

(Page 22)

MD OUT

(Page 22)

2121

HCD-GV6/GV8

7-5. BLOCK DIAGRAM – DISPLAY/KEY CONTROL/POWER SUPPLY Section –

(Page 21)(Page 21)

GRID DRIVE

Q605, 606

FL601

FLUORESCENT INDICATOR TUBE

GRID DRIVE

Q607

S601 – 607, 611 – 619, 621 – 627,

S701 – 730, 735, 741, 743 – 762

S608

S609

POWER

SAVE/DEMO

(STANDBY)

REMOTE CONTROL

RECEIVER

IC702

(Page 19)

ROTARY

ENCODER

S763

ROTARY

ENCODER

S736

DATA, CLK

S763

(JOG DIAL)

S736

VOLUME

FLUORESCENT INDICATOR TUBE DRIVER,

KEY CONTROL

44 – 46

SEG-1 – SEG-23

28 , 27

GR-15, GR-16

42, 40 – 29

GR-2 – GR-14

GR-1

11 – 15

KEY 0 – KEY 4

KEY POWER ON/OFF

KEY POWER

SAVE/DEMO

SIRCS

JOG A

JOG B

VOL A

VOL B

72 70

IC601

LED STANDBY

XOUT

X601

12.5MHz

BPF 0 BPF 1

BPF 2 BPF 3 BPF 4

ALL BAND

RESET

LED SEL

LED DAT LED SCK

LED LATCH

I2C DATA

I2C CLK

WAKE UP

D-SW

XIN

17 18 19 20 21

78 79

RECT D832

RECT D831

SUB POWER

TRANSFORMER

T901

POWER

TRANSFORMER

T951

VOLTAGE

SELECTOR

S901

RY901

POWER ON/OFF

RELAY DRIVE

Q901

AC IN

BAND-PASS FILTER

IC602

F02

F03

F04

14 13 12

F05 F06

REC LEVEL

LED DRIVER

IC701

DATA CLK STB

LED DRIVE

Q601

S742

LID (CD)

OPEN/CLOSE

DET

P1 – P6, P7 – P10, P12 – P16

B.P.F.

17, 19 – 23, 1 – 4, 7 – 11

DATA

D601

CLK

LINE

REC IN

SPEANA

B+ SWITCH

Q602, 603

D611 – 614, 621, 622, D700 – 710, 713, 714, D716 – 720, 741, 791

30 29

RESET

+5V (LED)

Q604

SYSTEM CONTROLLER

IC501 (4/4)

IIC-DATA IIC-CLK

CD-POWER

WAKE UP

STBY RELAY

POWER

EVER +5V

SYSTEM CONTROLLER (IC501),

CD MECHANISM CONTROLLER (IC502),

FL DRIVER (IC601) B+

TO FLUORESCENT

INDICATOR TUBE

(FL601)

POWER AMP (IC801),

PROTECT CIRCUIT

–35V

CD D+5V (SW)

CD STEREO/VIDEO CD

SECTION B+

+3.3V

MPEG VIDEO/AUDIO

DECODER (IC505) B+

CD A+5V (SW)

(VIDEO CD SECTION B+)

Q914

+5V (LED)

(PANEL SECTION B+)

D+5V (UNSW)

AU D+5V

M62493FP (IC101) B+

D+5V (SW)

(CD SENSOR SECTION B+)

TC, PANEL,

AUDIO

Q906

ST +10V

(FM/AM TUNER UNIT B+)

FAN MOTOR B+

TC M+12V

(TC MOTOR SECTION B+)

CD M+7V

(CD MOTOR SECTION B+)

+3.3V

REGULATOR

Q531

B+ SWITCH

Q913

A+7V

A–7V

FL DRIVER (IC601)

B–

VCD

B+ SWITCH

Q921

B+ SWITCH

Q911, 912

B+ SWITCH

Q901, 902

B– SWITCH Q903 – 905

TUNER

B+ SWITCH

Q931, 932

+7V

REGULATOR

IC933

REGULATOR

–35V

Q903, 908

+5V

IC921

+5V

IC911

+7V

IC901

–7V

IC951

+10V

REGULATOR

IC931

+12V

REGULATOR

IC932

+5V

IC901

+VL

–VL

+VH

–VH

RECT

D902 – 905

RECT

D841 – 844

RECT

D833 – 836

2222

HCD-GV6/GV8

CD-R (1) board

TC-B board

CD-L board

TC-A board

MIC board

ILLUMINATION board

PANEL VR board

PANEL FL board

TRANS board SUB TRANS board

TUNER PACK (FM/AM TUNER UNIT)

MAIN board

PA board

HEADPHONES board

CD-R (2) board

FRONT INPUT board

VIDEO board

7-6. NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS

Note on Printed Wiring Board:

• X : parts extracted from the component side.

• Y : parts extracted from the conductor side.

• : Pattern from the side which enables seeing.

(The other layers' patterns are not indicated.)

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.

• Indication of transistor.

C Q

These are omitted.

Note on Schematic Diagram:

• All capacitors are in µF unless otherwise noted. pF: µµF 50 WV or less are not indicated except for electrolytics and tantalums.

• All resistors are in Ω and 1/ specified.

• 2 : nonflammable resistor.

• 5 : fusible resistor.

• C : panel designation.

Note: The components identified by mark 0 or dotted line

with mark 0 are critical for safety. Replace only with part number specified.

• A : B+ Line.

• B : B– Line.

• H : adjustment for repair.

• V oltages are taken with a VOM (Input impedance 10 MΩ).

Voltage variations may be noted due to normal production tolerances.

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

• Circled numbers refer to waveforms.

• Signal path.

F : TUNER (FM/AM) E : TAPE PLAY (DECK A) d : TAPE PLAY (DECK B) G : RECORD L : CD PLAY (VIDEO) J : CD PLAY (AUDIO) c : DIGITAL OUT N : MIC INPUT

• Abbreviation EA : Saudi Arabia model IA : Indonesia model MY : Malaysia model SP : Singapore model

• Circuit Boards Location

W or less unless otherwise

TABLE SENSOR board

CD MOTOR board

LEAF SW board

BD board

AUDIO board

LED board

2323

HCD-GV6/GV8

7-7. PRINTED WIRING BOARD – BD Board –• See page 23 for Circuit Boards Location.

• Semiconductor Location (Side A)

Ref. No. Location

IC104 F-3

Q101 F-6

(KSS-213DH)

• Semiconductor Location (Side B)

Ref. No. Location

IC101 E-4 IC102 C-5 IC103 E-6

VIDEO BOARD CN501

(Page

28)

2424

7-8. SCHEMATIC DIAGRAM – BD Board –• See page 39 for Waveforms. • See page 51 for IC Block Diagrams.

HCD-GV6/GV8

VIDEO

BOARD

(1/2)

CN501

(Page 26)

D. OUT D. GND

AMUTE

XTAL33.8MHz

OPTICAL PICK-UP

BLOCK

(KSS-213DH)

OSC BUFFER

• Voltages and waveforms are dc with respect to ground under no-signal conditions. no mark : CD STOP ( ) : CD PLAY

The components identified by mark 0 or dotted line with mark 0 are critical for safety. Replace only with part number specified.

2525

HCD-GV6/GV8

7-9. SCHEMATIC DIAGRAM – VIDEO Board (1/2) –• See page 29 for Waveforms. • See page 51 for IC Block Diagrams.

(Page 25)

(Page 36)

2626

(Page 27)

(Page 35)

• Voltages and waveforms are dc with respect to ground under no-signal conditions. no mark : VIDEO CD PLAY

7-10. SCHEMATIC DIAGRAM – VIDEO Board (2/2) –• See page 29 for Waveforms. • See page 51 for IC Block Diagrams.

HCD-GV6/GV8

(Page 26)

• Voltages and waveforms are dc with respect to ground under no-signal conditions. no mark :VIDEO CD PLAY

2727

: Impossible to measure

∗

HCD-GV6/GV8

7-11. PRINTED WIRING BOARD – VIDEO Board –• See page 23 for Circuit Boards Location.

• Semiconductor Location (Side A)

Ref. No. Location

D301 B-5 D501 D-2 D502 H-1

(Page 38)

MAIN BOARD

CN701

• Semiconductor Location (Side B)

Ref. No. Location

IC501 E-3 IC502 G-3 IC506 E-5

IC101 H-5 IC401 B-2 IC504 G-5 IC505 D-4 IC507 D-6 IC509 G-6

Q301 B-5 Q304 C-2 Q306 B-5 Q307 B-4 Q308 B-4 Q310 B-3 Q502 D-2

BD BOARD CN101

(Page 24)

Q302 B-5 Q303 C-2 Q453 A-3 Q454 A-3 Q531 D-2

C571

MAIN BOARD

CN411

(Page 38)

2828

+ 64 hidden pages

Sony HCDGV-8 Service manual

TABLE OF CONTENTS

SERVICING NOTES

GENERAL

3-1. DISASSEMBLY FLOW

DISASSEMBLY

case

front panel section

3-4. COVER (TC), TAPE MECHANISM DECK (TCM-230PWR42)

3-5. MAIN BOARD, FAN, D.C. (M901)

3-6. CD MECHANISM DECK (CDM37L-5BD34L)

4 disc table

base unit (BU-5BD34L)

TEST MODE

MECHANICAL ADJUSTMENTS

ELECTRICAL ADJUSTMENTS

7-1. BLOCK DIAGRAM – CD SERVO Section –

DIAGRAMS

7-2. BLOCK DIAGRAM – AUDIO/VIDEO CD Section –

7-3. BLOCK DIAGRAM – TUNER/TAPE DECK Section –

7-4. BLOCK DIAGRAM – MAIN Section –

7-5. BLOCK DIAGRAM – DISPLAY/KEY CONTROL/POWER SUPPLY Section –

7-6. NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS