SONY HCD-XGV50 Service Manual

HCD-XGV50

SERVICE MANUAL

Ver 1.0 2003.08

• HCD-XGV50 is the Amplifier, CD player, tape deck and tuner section in LBT-XGV50.

Model Name Using Similar Mechanism

CD CD Mechanism Type CDM37B-30BD62

Section Base Unit Name BU-30BD62

Optical Pick-up Name A-MAX.3

TAPE Model Name Using Similar Mechanism HCD-XGV80

Section Tape Mechanism Type CWM43RR23

Mexican Model

HCD-XGV80

SPECIFICATIONS

The following measured at AC 127 V, 60 Hz DIN power output (rated): 135 + 135 watts

(6 ohms at 1 kHz, DIN)

Continuous RMS power output (reference):

165 + 165 watts

(6 ohms at 1 kHz, 10% THD) Inputs PHONO IN (phono jacks): sensitivity 3 mV,

impedance 47 kilohms MD (VIDEO) IN L/R (phono jacks):

sensitivity 450 mV(250 mV),

impedance 47 kilohms Outputs PHONES (stereo phone jack): accepts headphones of 8 ohms or more MD (VIDEO) OUT L/R (phono jacks):

voltage 250 mV, impedance 1 kilohms VIDEO OUT (phono jack): max. output level 1Vp-p,

load impedance 75 ohms FRONT SPEAKER: accepts of 6 to 16 ohms

VIDEO CD/CD player section

System Compact disc digital audio system Laser Semiconductor laser

(λ=795 nm)

Emission duration: continuous 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 NTSC, PAL

Tape deck section

Recording system 4-track 2-channel, stereo Frequency response 50 – 13,000 Hz (±3 dB),

using Sony TYPE I cassettes

Tuner section

FM stereo, FM/AM superheterodyne tuner FM tuner section Tuning range 87.5 – 108.0 MHz (50 kHz step) Antenna FM lead antenna Antenna terminals 75 ohms unbalanced Intermediate frequency 10.7 MHz

AM tuner section

Tuning range 530 – 1,710 kHz

(with the tuning interval set at 10 kHz) 531 – 1,602 kHz

(with the tuning interval set at 9 kHz) Antenna AM loop antenna Antenna terminals External antenna terminal Intermediate frequency 450 kHz

— Continued on next page —

9-961-115-01

2003H02-1

COMPONENT Hi-Fi STEREO SYSTEM

Sony Corporation

Home Audio Company

Published by Sony Engineering Corporation

HCD-XGV50

General

Power requirements Mexican models: 120 V or 127 V AC, 60 Hz Power consumption 150 watts Dimensions (w/h/d) (Main Unit) Approx. 355 x 425 x 451 mm Mass (Main Unit) Approx. 13.0 kg

Design and specifications are subject to change without notice.

Notes on chip component replacement

• Never reuse a disconnected chip component.

• Notice that the minus side of a tantalum capacitor may be damaged by heat.

Flexible Circuit Board Repairing

• Keep the temperature of 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.

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-XGV50

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 pickup block. Therefore, when checking the laser diode emission, observe from more than 30 cm away from the objective 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.

TABLE OF CONTENTS

1. SERVICING NOTE

·························································· 4

2. GENERAL ·········································································· 5

3. DISASSEMBLY ································································ 7

4. TEST MODE ···································································· 16

5. MECHANICAL ADJUSTMENTS ····························· 18

6. ELECTRICAL ADJUSTMENTS ······························· 18

7. DIAGRAMS

7-1. Circuit Board Location ······················································ 22 7-2. Block Diagram – CD Servo Section – ······························· 24

Block Diagram – Tuner/Tape Deck Section – ··················· 25 Block Diagram – Main Section – ······································ 26 Block Diagram

– Display/Key Control/Power Supply Section – ·········· 27 7-3. Printed Wiring Board – BD Section – ······························· 28 7-4. Schematic Diagram – BD Section – ·································· 29 7-5. Printed Wiring Board – Video Section – ··························· 30 7-6. Schematic Diagram – Video Section – ······························ 31 7-7. Printed Wiring Board – Motor LED Section – ·················· 32 7-8. Schematic Diagram –Motor LED Section – ······················ 32 7-9. Schematic Diagram – Main (1/4) Section – ······················ 33 7-10. Schematic Diagram – Main (2/4) Section – ······················ 34 7-11. Schematic Diagram – Main (3/4) Section – ······················ 35 7-12. Schematic Diagram – Main (4/4) Section – ······················ 36 7-13.Printed Wiring Board – Main Section – ····························· 37 7-14. Printed Wiring Board – CD-L, CD-R Section – ················ 38 7-15. Schematic Diagram – CD-L, CD-R Section – ··················· 39 7-16. Printed Wiring Board – TC-A, TC-B Section – ················ 40 7-17. Schematic Diagram – TC-A, TC-B Section – ··················· 41 7-18.Printed Wiring Board – Panel VR, Key Section – ············· 42 7-19. Schematic Diagram – Panel VR, Key Section –················ 43 7-20.Printed Wiring Board – Panel FL Section – ······················· 44 7-21. Schematic Diagram – Panel FL Section – ························· 45 7-22. Printed Wiring Board – Power Amp Section – ·················· 46 7-23. Schematic Diagram – Power Amp Section – ····················· 47 7-24. Printed Wiring Board – Power Supply Section –·············· 48 7-25. Schematic Diagram – Power Supply Section – ················· 48 7-26. IC Pin Function Description ············································· 49 7-27. IC Block Diagram ····························································· 56

8. EXPLODED VIEWS

8-1. Case, Back Panel Section ·················································· 59 8-2. Front Panel Section-1 ························································ 60 8-3. Front Panel Section-2 ························································ 61 8-4. Chassis Section ·································································· 62 8-5. CD Mechanism Deck Section (CDM37B-30BD62) ········· 63 8-6. Base Unit Section (BU-30BD62) ······································ 64

9. ELECTRICAL PARTS LIST ······································· 65

HCD-XGV50

SECTION 1

SERVICING NOTE

SERVICE POSITION FOR BD BOARD AND OPTICAL PICK-UP BLOCK

BD board

Bottom plate

BU fitting screw

Tw o screws (+BVTP 3 x 8)

Optical pick-up block

Main unit

ALBUM +/– qh CD SYNC qf Deck A ws Deck B w; Direct equalizer ef

SALSA/REGGAE/TANGO/ MOVIE/GAME/SAMBA/ ROCK/JAZZ/DANCE/POP

DIRECTION wk DISC 1 – 5 ek DISC SKIP ek Disc tray wd DISPLAY 2 Display window 7

EDIT wf EFFECT ej ENTER eg FM MODE qs FUNCTION qa

MD (VIDEO) ea MEMORY qs P FILE eh PHONES jack qg PHONO e; PLAY MODE wf Power illuminator 5 PUSH OPEN wd Remote sensor 3 REPEAT wf

ALPHABETICAL ORDER

A – D E – J K – R

qlwa w;wswd

wl wk

qd qf qg

23 745 8690qa1

elek

ed ef eg ehej

qh qj

SLEEP 9 SPECTRUM ANALYZER 4

SURROUND ed TIMER SELECT 8 TUNER ENTER qs TUNER/BAND qs TUNING MODE qs TUNING +/– qs VOLUME control 6 X-GROOVE ql

S – Z

?/1 (power) 1

/CLOCK SET 0

X (pause) qd h/H (play) qd wl x (stop) qd wl .m/M> (rewind/fast

forward) qd wl

z REC qf ./> (go back/go forward)

M/m/</, (cursor) eg

m/M (rewind/fast forward)

NX (play/pause) el x (stop) el A EJECT Z/Z B EJECT (eject)

BUTTON DESCRIPTIONS

SECTION 2

GENERAL

HCD-XGV50

This section is extracted from instruction manual.

HCD-XGV50

Remote control

This section is extracted from instruction manual.

ALPHABETICAL ORDER

A – N O – Z

ALBUM +/– qj CLEAR wa CLOCK/TIMER SELECT es CLOCK/TIMER SET ed DISC SKIP e; DISPLAY ea EFFECT 8 ENTER 0 FILE SELECT +/– 6 FUNCTION +/– wl NEXT wj Number buttons ws

ON SCREEN w; PLAY MODE qh PRESET +/– wj PREV wj REPEAT qg SELECT wk SLEEP qk SPECIAL MENU 5 SURROUND qa TUNER/BAND qd TUNING +/– wg TV CH +/– 3 TV/VIDEO 4 TV VOL +/– 2 VOL +/– 9

BUTTON DESCRIPTIONS

?/1 (power) 1

M/m/</, (cursor) 0

X (pause) wd x (stop) wf m/M (rewind/fast forward) ./> (go back/go forward)

CD N (play) wk KEY CONTROL RETURN O qf TAPE A nN (play) qs TAPE B nN (play) 7 TV ?/1 ql

#/2 wh

qj qh

qg qf

qd qs

1 2 3

es ea

w; wa

4 5

wl wk

wd wf

SECTION 3

)

DISASSEMBLY

• The equipment can be removed using the following procedure.

Set Case Front panel section Tape mechanism deck (CWM43RR23)

PANEL FL board, GAME board, TC-A board, TUNER board, TC-B board

KEY board

PANEL VR board

HEADPHONE board, ALBUM board, Bumper ASSY

CD-L board, DOOR SW board, CD-R board

VIDEO board

Back panel, DC fan, MAIN board

CD mechanism deck (CDM37B-30BD62)

HCD-XGV50

Base unit-1 (BU-30BD62)

Disc table

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

3-1. CASE

Case

Three screws (CASE3 TP2)

Base unit-2 (BU-30BD62) BD board

Five screws (BVTT 3x6)

Tw o screws (BVTP 3x8

Three screws (CASE3 TP2)

HCD-XGV50

)

3-2. FRONT PANEL SECTION

Connector (CN311)

Flat type wire (CN371

Flat type wire (CN431)

Screw (BVTP 3x8)

Front panel section

3-3. TAPE MECHANISM DECK (CWM43RR23)

Claw

Connector (B deck)

Four screws (BVTP 3x8)

Flat type wire (13 core)

Lug

Connector (CN806)

Tw o screws (BVTP 2.6x8)

Tw o screws (BVTP 2.6x8

Front panel

Tape mechanism deck

(CWM43RR23)

3-4. PANEL FL BOARD, GAME BOARD, TC-A BOARD, TUNER BOARD, TC-B BOARD

)

Five screws (BVTP 2.6x8)

(CN601)

Bracket (TA)

Two claws

Screw (BVTP 2.6x8)

qh Two

claws

(BVTP 2.6x8)

GAME board

TC-A board

Four screws

(BVTP 2.6x8)

Connector

(CN700)

Three claws

PANEL FL

board

HCD-XGV50

Flat type wire

Screw (BVTP 2.6x8)

Bracket (MAIN)

Four screws (BVTP 2.6x8

Four screws (BVTP 2.6x8)

TUNER board

Four screws

(BVTP 2.6x8)

Three claws

3-5. KEY BOARD

Three claws

Front panel

Three claws

Screw (BVTP 2.6x8)

Bracket (TA)

TC-B board

Connector (CN600)

Three screws (BVTP 2.6x8

OPERATION PANEL ASSY

KEY board

Cursor

Five screws (BVTP 2.6x8)

Flat type wire (CN801)

Front panel

HCD-XGV50

)

3-6. PANEL VR BOARD

Nut (Supplied with S700)

Volume knob

Flat type wire (CN601)

Six screws (BVTP 2.6x8)

Flat type wire (CN801

PANEL VR board

3-7. HEADPHONE BOARD, ALBUM BOARD, BUMPER ASSY

Front panel

HEADPHONE board

Bracket HP PWB

Five screws

(BVTP 2.6x8)

To w screws (BVTP 2.6x8)

ALBUM board

Bumper ASSY

Claw

HCD-XGV50

)

3-8. CD-L BOARD, DOOR SW, CD-R BOARD

Sub panel CD ASSY

DOOR SW

board

Froating screw

(DIA.12)

CD-L board

BRACKET (S/P) (L)

Five claws

Connector (CN700)

CD-R board

Front panel

Connector (CN600)

Four screws (BVTP 2.6x8)

Five screws (BVTP 2.6x8

Screw (BVTP 2.6x8)

3-9. VIDEO BOARD

Four screws

(BVTP 2.6x8)

Four screws (BVTP 2.6x8)

BRACKET (S/P) (R)

Screw (BVTP 2.6x8)

Two screws

(BVTP 3 X 8)

Flat type wire

(CN201)

VIDEO board

Connector (CN301)

Flat type wire (CN101

Two screws

(BVTP 3 X 8)

HCD-XGV50

3-10. BACK PANEL, DC FAN (M901), MAIN BOARD

Back panel

DC FAN

(M901)

Flat type wire

(CN401)

Flat type wire (CN441)

Seven screws

(BVTP 3 X 8)

Two screws

(BVTP 3 X 8)

Two screws

(BVTP 3 X 8)

Tow screws

(BVTP 3 X 8)

Three screws

(BVTP 3 X 8)

Connector

(CN721)

Connector (CN961)

Connector (CN441)

MAIN board

Two screws

(BVTP 3 X 8)

Two connectors

(CN901, 902)

3-11. CD MECHANISM DECK (CDM37B-30BD62)

Flat type wire

(CN401)

Three screws

(BVTP 3 X 8)

Connector

(CN411)

Two screws (BVTP 3 X 8)

Four screws (BVTP 3 X 8)

Wire holder

Two screws

(BVTP 3 X 8)

HCD-XGV50

CD mechanism deck

(CDM37B-30BD62)

Five screws (BVTP3 × 8)

Remove two cables from

wire holder.

HCD-XGV50

)

3-12. BASE UNIT-1 (BU-30BD62)

Boss

Base unit (BU-30BD62)

BU fitting scre

3-13. BASE UNIT-2 (BU-30BD62)

Two floating screws (DIA.12)

Two coil springs

(insulator)

Base unit (BU-30BD62)

Two screws

(BVTP 2.6 X 8)

Two stoppers

(BU)

Two coil springs (insulator

Holder (BU30) assy

3-14. BD BOARD

BD board

BU-30BD62

Flat type wire (CN102)

HCD-XGV50

3-15. 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.

Cam (holder)

Roller cam

Remove the two solders.

Step screw

Screw (BVTP 3

Bracket (BU)

Disc tabl

HCD-XGV50

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 x (TC-B) , TUNER ENTER , and \/1 simultaneously.

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

[Change-over the AM Tuning Interval]

• 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 TUNER ENTER 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 Ship Mode] (No memory clear)

• 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 EDIT and

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 x (TC-B) , TUNER ENTER ,and DISC 2 simultaneously.

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

3. Press the DISC 1 button, the MODE and DESTINATION are displayed fluorescent indicator tube.

4. Each time the DISC 1 button is pressed, the MC/GC category version is displayed in the following order.

NR MC GC CD CDDM CDMA

5. Press the DISC 2 button, and the key check mode is acti-vated.

6. In the key check mode, the fluorescent indicator tube displays “K 0 J0 V0”. Each time a button is pressed, “K” value in-creases to “K69”call the button is pressed. However, once a button is pressed, it is no longer taken into account. “V” value increases like 1, 2, 3 ... if turn the VOLUME dial clockwise (“+” direction), or it decreases like 0, 9, 8 ... if turn the VOLUME dial counterclockwise (“–” direction).

7. To release from this mode, press three buttons in the same manner as step 1, or disconnect the power cord.

buttons simultaneously.

\/1

BDABDBSTTATMTC

CDM

[Sled Servo Mode] (CD service mode)

• This mode can run the CD sled motor freely. Use this mode, for instance, when cleaning the pick-up.

Procedure:

1. Select the function “CD”.

2. Press three buttons x (TC-B) , TUNER ENTER , and DISC 5 simultaneously.

3. The Sled Servo mode is selected, if “CD” is blanking on the fluorescent indicator tube.

4. With the CD in stop status, press M button in CD section to move the pick-up to outside track, or m button to inside track.

5. To exit from this mode, press OFF.

Note:

• Always move the pick-up to most inside track when exiting from this mode. Otherwise, a disc will not be unloaded.

• Do not run the sled motor excessively, otherwise the gear can be chipped.

[Change-over of FUNCTION Name]

• The FUNCTION name of external input terminal can be changed over to VIDEO or MD. With the FUNCTION selected to “MD”, about 5dB mute is applied to the input gain.

Procedure:

1. Press \/1 button to turn the power OFF.

2. Press several seconds, and the power is turned on, the display of fluorescent indicator tube changes to “MD” or “VIDEO” instantaneously, and thus the FUNCTION is changed over.

[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 x (TC-B) , TUNER ENTER ,and DISC 4 simultaneously.

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

[Changeover the color system]

The color system can be changed over PAL, NTSC or AUTO.

Procedure:

The color system can be changed over PAL, NTSC or AUTO by pressing \/1 button while pressing followings and indication on display changes to “COLOR PAL”, “COLOR NTSC” or “COLOR

AUTO”.

button together with FUNCTION button for

\/1

button turn to the power

\/1

PA L: REGGAE + \/1 NTSC : MOVIE + \/1 AUTO : TANGO + \/1

HCD-XGV50

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

“TAPE A AG-1”

Shut off

FWD the tape A “TAPE A AG-2”

2 minutes

Fast forward the tape A

“TAPE A AG-3”

Shut off or 20 seconds

RVS the tape A

“TAPE A AG-4”

2 minutes

Rewind the tape A

“TAPE A AG-5”

Shut off

3. CD Section

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

• If an error occurred, stop display that step.

Aging mode sequence (CD section):

Tray Turn

DISC 1

chucking

TOC Read

Track 1 Play

2 seconds

Last Track Play

2 seconds

FWD the tape B

“TAPE B AG-2”

2 minutes

Fast forward the tape B

“TAPE B AG-3”

Shut off or 20 seconds

RVS 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.

Tray Tun

DISC 4

Chucking

TOC Read

Track 1 Play

2 seconds

Last Track play

[VACS ON/OFF]

• The volume control by VACS is turned ON/OFF.

Procedure:

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

2. Press the PLAY MODE and \/1 buttons simultaneously.

3. The reaction display appears when switcing ON/OFF.

HCD-XGV50

SECTION 5

MECHANICAL ADJUSTMENTS

Precaution

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

record/playback heads pinch rollers erase head rubber belts capstan

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

2.9~6.9 mN•m

FWD CQ-102C (30 to 70 g•cm)

(0.42 – 0.97 oz•inch)

FWD 0.19~0.59 mN•m

back tension CQ-102C (2 to 6 g•cm)

(0.03 – 0.08 oz•inch)

7.8~16.7 mN•m

FF/REW CQ-201B (80 to 170 g•cm)

(1.11 – 2.36 oz • inch)

SECTION 6

ELECTRICAL ADJUSTMENTS

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 R-CH.

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

8. 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 x (TC-B) , TUNER ENTER ,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 3kHz, 0dB Tape Speed Adjustment

HCD-XGV50

)

set

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

+ –

frequency counter

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

Tape speed adjustment control inside motor

Record/Playback Head Azimuth Adjustment DECK A DECK B

Note: Perform this adjustments for both decks

Procedure:

1. Mode: Playback (FWD)

test tape P-4-A100 (10 kHz, – 10 dB)

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

level meter

set

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.

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

Procedure:

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 (VIDEO) 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 pats adjusted.

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

2. Press the H button on the deck B.

3. Adjust the tape speed adjustment control inside motor so that

frequency counter reads 3,000 ± 90Hz.

Sample value of wow and flutter : W.RMS (JIS) less than 0.3% WS-48B

Adjustment Location:

Tape speed Adjustment

HCD-XGV50

)

CD SECTION

Note :

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

2. Use LUV-P01 (4-999-032-01) unless otherwise indicated.

3. Use an oscilloscope with more than 10MΩ 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

Oscilloscope

BD board

TP(FE) TP(DVC)

Procedure :

1. Connect oscilloscope to TP (FE).

2. Connect between TP (FE) and TP (DVC ( 1.65 V)) by lead wire.

3. Press the \/1 button to turn the power ON.

4. Load a disc (LUV-P01) and actuate the focus search. (In consequence of open and close the disc tray, actuate the focus search)

5. Confirm that the oscilloscope waveform (S-curve) is symmetrical between A and B. And confirm peak to peak level within 2 ±0.5 Vp-p.

S-curve waveform

symmetry

within 4

1Vp-p

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

clearly distinguished at the center of the waveform.

VOLT/DIV : 200mV TIME/DIV : 500ns

level : 1.45

0.3Vp-p

E-F Balance (1 Track jump) Check

oscilloscop

BD board

TP(TE) TP(DVC)

Procedure:

1. Connect oscilloscope to TP (TE) and TP (DVC) board.

2. Press the \/1 button to turn the power ON.

3. Load a disc (LUV-P01) and playback the number nine track.

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

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

center of waveform

B=1.3 ± 0.6Vp-p

Specified level: × 100=less than – 22%

A B

symmetry

A (DC voltage

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

oscilloscope

BD board

TP(RFDC) TP(RFAC)

Procedure :

1. Connect oscilloscope to TP (RFDC) and TP (RFAC).

2. Press the \/1 button to turn the power ON.

3. Load a disc (LUV-P01) and playback.

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

Checking Location:

[BD BOARD] (SIDE B)

DVC

RFDC

RFAC

DVC

VIDEO SECTION

Note :

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

2. Use HLV-402 (8-909-870-00) unless otherwise indicated.

3. Use an oscilloscope with more than 10MΩ 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.

Video Level Check (VIDEO BOARD)

Purpose

This adjustment is made to satisfy the NTSC standard, and if not adjusted correctly, the brightness will be too large or small.

Oscilloscop

Ω

set

HCD-XGV50

J721 VIDEO OUTPUT

Procedure:

1. Connect oscilloscope to VIDEO output.

2. Load a disc HLV-402 (8-909-870-00) playback.

3. Check that the video level is 1.0 ± 0.1 Vp-p.

(WHITE 100%)

1.0 ± 0.1 Vp-

HCD-XGV50

Five screws (BVTT 3x6)

7-1. CIRCUIT BOARD LOCATION

SECTION 7

DIAGRAMS

GAME board

TC-A board

CD-L board

ALBUM board

PANEL FL board

TRANS board

SUB TRANS board

TUNER PACK (FM/AM TUNER UNIT)

MAIN board

PA board

TUNER board

TC-B board

KEY board

PANEL VR board

DOOR SW board

HEADPHONE board

CD-R board

SENSOR board

VIDEO board

BD board

MOTOR board

LED board

WAVEFORMS

HCD-XGV50

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.

• f : internal component.

•

• 5 : fusible resistor.

Note:

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

• C : panel designation.

• A : B+ Line.

• B : B– Line.

• H : adjustment for repair.

•Voltages and waveforms are dc with respect to ground

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

•Waveforms are taken with a oscilloscope.

• Circled numbers refer to waveforms.

• Signal path.

: nonflammable resistor.

under no-signal conditions. BD board section and VIDEO board section. no mark: CD PLAY Other board section no mark: TUNER (FM/AM) ( ): TAPE PLAY < >: TAPE REC [ ]: CD PLAY

Voltage variations may be noted due to normal production tolerances.

F : TUNER (FM/AM) E : TAPE PLAY (DECK A) d : TAPE PLAY (DECK B) G : RECORD J : CD PLAY g : VIDEO

W or less unless otherwise

Note on Printed Wiring Boards:

• X : parts extracted from the component side.

• : Pattern from the side which enables seeing.

(The other layers´ Patterns are not indicated.)

• Indication of transistor.

These are omitted.

– MAIN BOARD – – BD BOARD –

IC501 qa (XC-OUT)

3.0Vp-p

32KHz

VOL/DIV : 1V AC

IC501 qd (X-OUT)

16MHz

CN321 2

TAPE REC only

sec

CN321 3

TAPE REC only

sec

TIME/DIV : 10

VOL/DIV : 1V AC TIME/DIV : 50nsec

VOL/DIV : 10V AC TIME/DIV : 5

2.0Vp-p

24Vp-p

36Vp-p

sec

– VIDEO BOARD –

1 IC505 (XTAO)

2 IC505 (CLKB)

3 IC505 (RFAC)

150

33.8688 MHz

207

27 MHz

173

VOL/DIV : 0.2V AC TIME/DIV : 0.5

4 IC505 6 (EPSIG)

2.5 Vp-p

VOL/DIV : 1V AC TIME/DIV : 20nsec

2.8 Vp-p

VOL/DIV : 1V AC TIME/DIV : 20nsec

0.8 Vp-p

sec

0.8 Vp-p

VOL/DIV : 0.5V AC TIME/DIV : 20

sec

IC103 qg (RFAC)

IC103 qh (FE)

IC103 qk (TE)

5 Q301 E

– PANEL FL BOARD –

0.8 Vp-p

VOL/DIV : 0.2V AC TIME/DIV : 0.5

VOL/DIV : 0.2V AC TIME/DIV : 0.2msec

VOL/DIV : 1V AC TIME/DIV : 0.2msec

sec

0.15 Vp-p

0.7 Vp-p

IC601 is (X OUT)

4MHz

3.0Vp-p

VOL/DIV : 1V AC TIME/DIV : 0.2

0.8 Vp-p

VOL/DIV : 0.5V AC TIME/DIV : 20

sec

6 IC307 6 (VOUT)

sec

1.0 Vp-p

VOL/DIV : 0.5V AC TIME/DIV : 20

sec

HCD-XGV50

7-2. BLOCK DIAGRAMS

– CD SERVO SECTION –

+2.5V

VCC

+4.5V

VCC

PD1

PD2

I-V AMP

I1-6

I5-10

OPTICAL PICK-UP BLOCK

(A-MAX.3)

LASER DIODE

SPINDLE

MOTOR

COIL

FOCUS

COIL

S101

(LIMIT)

T+

T-

F+

F-

(

TRACKING

ON: when the optical pick-up

(

is inner position.

M101

M102 SLED

DRIVE

Q101

FOCUS/TRACKING ERROR AMP

VCC

F I-V AMP

E I-V AMP

FOCUS/TRACKING COIL DRIVE,

SPINDLE/SLED MOTOR DRIVE

VO4+

VO4

VO3+

VO3

VO2

VO2+

VO1

VO1+

RF AMP,

IC103

SUMMING

APC LD

AMP

∑

A-D

IC102

MOTOR

DRIVE

MOTOR

DRIVE

COIL

DRIVE

COIL

DRIVE

FOCUS

ERROR AMP

TRACKING

ERROR AMP

APC PD

AMP

VREF

IN3+

IN3

IN2+

IN2

IN1+

IN1

STBY

IN4

4 3

EQ_IN

RF EQ

AMP

VDC

BUFFER

DATA DECODERR, D/A CONVERTOR

IC506

RST

AMP

RFC

RFACAC_SUM

RFDCO

RFDCI

VDC

FEI

28 29

16 17

Q102

LD-ONFERFDC

5 9 346

AO4

AO6

AO3

RST

AO5

CLK

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

• Signal Path

: CD PLAY (ANALOG)

RFAC

173

RFDC

160

201

CD-DSP,

IC505

GPIO2

SRQ

GPIO3

SOK

AUDXCLKO

DRDAT0

DRDAT15

DRADR0

DRADR10

GPIO4

GPIO5

SCS

AUDDTO0

AUDLRCK

AUDBCK

GPIO11

CPSIG

NVOEL DRDQM1 DRDQM0

DRCK

DRBS DRRAS DRCAS

DRWEL

SYS RST

RST

204

203

205

74 78 77 70 76 72 68 73

49-56, 59-66

34-37, 39-45

164

162

163

CLKA

CLK

206

207

149

150

189

133

161

165

137

138

140

141

142

143

135

CLKB

XTAI

XTAO

GPIO9

XTSL

MDP

SFDR

SRDR

TFDR

TRDR

FFDR

FRDR

SSTP

GPIO14

GPIO13

GPIO12

DIGITAL SERVO,

MPEG DECODER, DAC

GPIO0

GPIO1

13 14 15 16 18 19

SCK

X502

27MHz

X501

33.8688MHz

DATA

CLK

LAT

MCLK

A+5V (SW)

+3.3V

REG

Q581

6 5

VCC

DATA

I/F

LRCK

BLK

CONTROL

17 18 20 38 15 39

BA0

CLK

CAS

RAS

LDQM

D/A

CONVERTOR

IC504

VDD

LOUT CD-L

DAC

UDQM

ROUT

A0-A16 DQ0-DQ7

2-12,23, 25-31

2,4,5,7,8,10,11,13,

23-26,

42,44,45,47,48,50,51,53

29-34

A0-A9

SDRAM

IC507

ROM

IC508

8-15

0-15

DQ0-DQ15

13-15, 7-21

0-7

LPF

IC102

: VIDEO

R-ch

LPF

Q302

SYSTEM CONTROLLER

(CD MECHANISM CONTROL)

CD-DATA

XLT

To MAIN SECTION

(Page 26)

VIDEO AMP

IC307

3 6

STB

+4.5V

(IC103)

Q370

+2.5V

+3.3V

V-MUTE

SQ-CLK

TBL-SENS

BU UP/DW SW

LED-DISK

IC501 (1/4)

MTR-CTRL1

MTR-CTR2

SQ-DATA

CD-CLK

SCOR

HOLD

XRST

4036 37 193243

RST

SCS

SCK

SOK

SRQ

OUT

RIPPLE FILTER

Q201

+2.5V REG

IC201

+3.3V REG

IC202

(UP SWITCH)

LED DRIVE

Q412

Q411

DISC TABLE

S201

Q201

VCD-VIDEO

SENSOR

IC202

TABLE MOTOR DRIVER

IN2

IN1

D+5V (SW)

(DISC No.)

IC201

MOTOR

DRIVE

D201

To MAIN SECTION

(Page 26)

OUT2

OUT1

M201

(TABLE)

+ 56 hidden pages