Sony HCDVX-888 Service manual

HCD-VX888

SERVICE MANUAL

Ver 1.0 2001.04

• HCD-VX888 is the tuner, deck, Video CD and amplifier section in MHC-VX888.

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

CD CD Mechanism Type CDM58E-30BD61A Section Base Unit Name BU-30BD61A

Tape deck Model Name Using Similar Mechanism HCD-DX80 Section Tape Tr ansport Mechanism Type TCM-230AWR41

E Model

Model Name Using Similar Mechanism NEW

Optical Pick-up Name A-MAX.3

Amplifier section

The following measured at AC 120, 220, 240V, 50/60 Hz DIN power output (rated) 160 + 160 watts

Continuous RMS power output (reference)

Inputs GAME (VIDEO): 1Vp-p, 75 ohms (phono jacks) GAME (AUDIO): voltage 250 mV, (phono jacks) impedance 47 kilohms MD/VIDEO (AUDIO) IN: voltage 450 mV/250 mV, (phono jacks) impedance 47 kilohms MIC 1/2: sensitivity 1 mV, (phone jack) impedance 10 kilohms Outputs VIDEO OUT: max. output level (phono jacks) 1 Vp-p, unbalanced,

S. VIDEO OUT: Y: 1 Vp-p, unbalanced, (4-pin/mini-DIN jack) Sync negative,

AUDIO OUT: voltage 140 mV, (phono jacks) impedance 47 kilohms PHONES: accepts headphones of 8 (stereo mini jack) ohms or more FRONT SPEAKER: accepts impedance of 6 to

SURROUND SPEAKER: accepts impedance of

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

(6 ohms at 1 kHz, 10% THD)

Sync negative, load impedance 75 ohms

C: 0.286Vp-p, load impedance 75 ohms

16 ohms 6 to 16 ohms

SPECIFICATIONS

VIDEO CD/CD player section

System Compact disc and digital Laser Semiconductor laser Laser Output Max. 44.6 µW*

Frequency response 2 Hz – 20 kHz (±0.5 dB) Wave length 780 – 790 nm 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) Wave length 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) using Sony TYPE I

Wow and flutter ±0.15% W.Peak (IEC)

audio system (λ=780nm) *This output is the value

measured at a distance of 200 mm from the objective lens surface on the Optical Pick-up Block with 7 mm aperture.

NTSC, PAL

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

0.1% W.RMS (NAB) ±0.2% W.Peak (DIN)

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 Latin American models: 530 – 1,710 kHz

Middle Eastern models: 531 – 1,602 kHz

Other models: 531 – 1,602 kHz

Antenna AM loop antenna Antenna terminals External antenna terminal Intermediate frequency 450 kHz

(with the interval set at 10 kHz) 531 – 1,710 kHz (with the interval set at 9 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)

– Continued on next page –

9-873-817-11 Sony Corporation

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

MINI HI-FI COMPONENT SYSTEM

HCD-VX888

General

Power requirements Australian models: 230 – 240 V AC,

Mexican models: 120 V AC, 60 Hz Thailand models: 220 V AC, 50/60 Hz Other models: 120 V, 220 V or

Power consumption Dimensions (w/h/d) Approx. 280 x 360 x 425

Mass Approx. 10.5 kg Design and specifications are subject to change

without notice.

50/60 Hz

230 – 240 V AC, 50/60 Hz Adjustable with voltage selector

250 watts mm

MODEL IDENTIFICATION

— BACK PANEL —

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 objective lens.

Laser component in this product is capable of emitting radiation exceeding the limit for Class 1.

PARTS No.

MODEL

E3, EA, SP2/6, IA models E91 model

• Abbreviation E3 : 240 V AC Area in E model E91 : 220 V AC Area in E model EA : Saudi Arabia model SP2/6 : Malaysia, singapore model IA : Indonesia model

PARTS No.

4-232-028-2 4-232-028-4

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

[]

CAUTION

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

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.

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 MANU AL OR IN SUPPLEMENTS PUBLISHED BY SONY.

2

GENERAL

This section is extracted from instruction manual.

Parts Identification

Main unit

The items are arranged in alphabetical order. Refer to the pages indicated in parentheses ( ) for details.

1 234

5

e;

wl wk

wj wh

wg

X

W

V

TU

CD 6 (9, 11~14, 20, 22) CD SYNC HI-DUB qj (21, 22) CINEMA SPACE el (25)

DECK A Z wf (20, 21) DECK B Z qd (20, 21) DIRECTION ed (20~22, 27) DISC 1~3 2 (11~14, 22) DISC SKIP/EX-CHANGE 4

(11~14)

Disc tray 3 (11) DISPLAY ea (10, 15, 32) DOLBY NR ef (20~22)

ECHO LEVEL wj (26) EDIT ed (21) EFFECT ON/OFF rd (24, 26) ENTER ej (10, 12, 14, 17, 18, 23,

25, 28, 33)

FM MODE ef (19, 33)

R

Q

S

GAME e; (29) GAME EQ rs (8, 24, 29) GROOVE ra (24)

KARAOKE PON wl (26)

MD (VIDEO) 9 (29, 32) MIC 1/2 wg (26) MIC LEVEL wh (26) MOVIE EQ eh (8, 24, 29) MUSIC EQ rf (8, 24, 29)

P FILE ek (25 ) PICTURE EFFECT wd (17) PHONES jack qs

PLAY MODE eg (11, 13, 22, 33)

REC PAUSE/START qg (21, 22,

REPEAT ef (12, 14)

NO

P

: Connect the headphones

27)

6 7 8 9

0

K

L

M

ea es ed ef

eg

rf

rd rs

ra

r; el

SHUTTLE qa (12, 13) SPECTRUM es (26) SURROUND SPEAKER MODE

wk (24)

TAPE A/B 8 (20, 21, 27) TUNER/BAND 7 (18, 19, 21) TUNER MEMORY eg (18)

VOLUME control q; (28)

: Adjusts the volume.

BUTTON DESCRIPTIONS

@/1 (power) 1 (8, 9, 19, 29, 32,

33)

Z OPEN/CLOSE (disc tray)

5 (11, 12, 14)

x (stop) w; (11~13, 16, 17, 20,

21, 33)

nN (play) ql (11~14, 16, 21,

27)

> (go forward) qh (11~14,

16~21)

X (pause) qk (11, 13, 20, 21) . (go back) wa (11~14, 16~21) m/– (rewind) ws (12, 13,

17~21, 33)

M/+ (fast forward) qf (12, 13,

17~21)

v/V/b/B (cursor) r; (10, 22, 25,

28)

eh ej ek

4

Remote Control

The items are arranged in alphabetical order. Refer to the pages indicated in parentheses ( ) for details.

A

C

B

D

E

r

s

ra

r;

el

ek

ej

eh

eg

ef ed es ea

e; wl

wk wj

Z

Y

CD ra (9, 11~14, 20, 22) CINEMA SPACE ql (25) CLEAR ed (14, 16) CLOCK/TIMER SELECT 2

(23, 28)

CLOCK/TIMER SET 3 (10, 22,

28)

D.SKIP qs (11~14) DISPLAY ej (10, 15, 32)

EFFECT ON/OFF qk (24, 26) ENTER ws (10, 12, 14, 17, 18,

23, 25, 28)

GAME el (29) GAME EQ wg (8, 24, 29)

KARAOKE PON ef (26) KEY CONTROL qj (26)

MD (VIDEO) ek (29, 32)

6

X

1

2

3

4

5

6

7

8

9

U

W

V

6

7

8

9 0

K L M N O P

Q R S

T

MOVIE EQ wa (8, 24, 29) MUSIC EQ wh (8, 24, 29)

NEXT ea (12, 16, 17) Numeric buttons eh (13, 16)

ON SCREEN qa (15)

PREV ea (12, 15, 16) PICTURE EFFECT wj (17) P FILE wd (25)

REPEAT 9 (12, 14) RETURN O qg (12)

SLEEP 1 (27) SURROUND SPEAKER MODE

wk (24) SPECIAL MENU 0 (16, 17) SPECTRUM eg (26) SELECT qd (12)

TAPE A/B rs (20, 21, 27) TUNER/BAND r; (18, 19, 21) TV @/1 4 (9) TV VIDEO 8 (9) TV VOL +/– 6 (9) TV CH +/– 7 (9)

VOL +/– w; (28)

: Adjusts the volume.

BUTTON DESCRIPTIONS

@/1 (power) 5 (8, 9, 19, 29, 32,

33)

nN (play) qd (11~14, 16, 21,

27)

X (pause) qf (11, 13, 20, 21) x (stop) qh (11~13, 16, 17, 20,

21, 33)

. (go back)/PRESET – e;

(11~14, 16~21)

> (go forward)/PRESET + e;

(11~14, 16~21)

m (rewind)/TUNING – wl (12,

13, 17~21, 33)

M (fast forward)/TUNING + wl

(12, 13, 17~21)

v/V/b/B (cursor) wf (10, 22, 25,

28)

HCD-VX888

5

HCD-VX888

Setting the time

1

Turn on the system.

2

Press CLOCK/TIMER SET on the remote.

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

3

Press cursor V/v repeatedly to select CLOCK SET.

4

Press ENTER.

5

Press cursor V/v repeatedly to set the hour.

6

Press ENTER.

7

Press cursor V/v repeatedly to set the minute.

8

Press ENTER.

The clock starts working.

Tip

If you have 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.

Saving the power in standby mode

Press DISPLAY repeatedly when the power is off. Each time you press the button, the system switches cyclically as follows:

Demonstration t Clock t Power Saving Mode

Tips

• The ?/1 indicator light up even in the Power

Saving Mode.

• The timer works in the Power Saving Mode.

Note

You cannot set the time in the Power Saving Mode.

To cancel the Power Saving Mode

Press DISPLAY once to show the demonstration, twice to show the clock display.

Inserting the batteries into the remote control

AA (R6) batteries

E

e

Using the remote

To

Turn the TV on or off

Switch the TV’s video input

Change the TV Channel

Adjust the volume of the TV speaker

Tip

When the remote no longer operates the system, replace both batteries with new ones.

Note

If you do not use the remote for a long period of time, remove the batteries to avoid possible damage from battery leakage.

Press

TV ?/1.

TV/VIDEO

TV CH +/–

TV VOL +/–

Getting Started

6

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

2-1. DISASSEMBLY FLOW

SET

2-2. CASE (TOP)

(Page 8)

2-3. LOADING PANEL

(Page 8)

2-4. CD MECHANISM DECK

(CDM58E-30BD61A) (Page 9)

HCD-VX888

SECTION 2

DISASSEMBLY

2-5. FRONT PANEL SECTION

(Page 9)

2-7. BACK PANEL SECTION

(Page 10)

2-8. MAIN BOARD

(Page 11)

2-10. BASE UNIT

(BU-30BD61A) (Page 12)

2-6. TAPE MECHANISM DECK

(TCM-230AWR41) (Page 10)

2-9. LEAF SW BOARD,

HEAD (A) BOARD, HEAD (B) BOARD (Page 11)

2-11. VIDEO BOARD,

DRIVER BOARD (Page 12)

2-12. MOTOR BOARD,

ADDRESS SENSOR BOARD (Page 12)

7

HCD-VX888

)

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

2-2. CASE (TOP)

two screws (case 3 TP2)

5

8

side panel (L)

6

screw (case 3TP2)

qa

case (Top)

q;

7

two screws

(+BVTP 3

×

10)

q;

4

side panel (R)

9

four screws

(+BVTP 3

×

12)

2-3. LOADING PANEL

3

loading panel

3

two

screws

(+BVTP 3

1

two screws (case 3 TP2

2

screw (case 3 TP2)

–BOTTOM VIEW– CD mechanism deck (CDM58E-30BD60)

×

10)

2

Pull-out the disc tray.

8

1

Turn the pulley in the direction of the arrow.

Front panel side

2-4. CD MECHANISM DECK (CDM58E-30BD61A)

7

CD mechanism deck (CDM58E-30BD61A)

5

6

screw (+BVTP 3

4

×

connector

CN781)

(

10)

×

10)

1

wire (flat type) (15 core)

2

connector

CN202)

(

3

connector (

CN403)

HCD-VX888

(CN201)

2-5. FRONT PANEL SECTION

2

wire (flat type) (17 core)

8

Screws

(+BVTP 3

9

(CN304)

×

10)

1

connector (

CN607)

6

screw (+BVTP 3

× 10)

two screws

6

(+BVTP 3

× 10

7

screws (+BVTP 3

3

connector (

4

connector (

0

)

front panel section

CN1)

CN2)

5

screw

(+BVTP 3

×

10)

× 10

)

9

HCD-VX888

)

2-6. TAPE MECHANISM DECK (TCM-230AWR41)

1

five

screws

(+BVTP 2.6

×

8

2-7. BACK PANEL SECTION

2

1

connector (CN973)

connector

(CN505)

6

back panel section

2

Tape mechanism deck

(TCM-230AWR41)

4

five screws

(+BVTP 3

5

two screws

(+BVTP 3

×

10)

10

3

connector

(CN891)

2-8. MAIN BOARD

)

MAIN board

2

MAIN board

HCD-VX888

2-9. LEAF SW BOARD, HEAD (A) BOARD, HEAD (B) BOARD

2

five claws

1

two screws (+BVTP 3

3

LEAF

SW board

1

Remove the four solderings.

×

10

5

head (A) board

4

screw (+PTT 2

×

7

4)

6

head (B) board

screw (+PTT 2

×

4)

11

HCD-VX888

)

2-10. BASE UNIT (BU-30BD61A)

0

base unit (BU-30BD61A)

9

two insulators (BU-30)

8

9

two insulators (BU-30)

7

screws (DIA. 12)

4

coil spring (insulator)

3

two stoppers (BU)

2

two screws (+BVTP 2.6

2-11. VIDEO BOARD, DRIVER BOARD

×

6

two

coil springs (insulator)

5

two

screws (+PTPWH M2.6

1

wire (flat type)

8)

4

coil spring (insulator)

(25 core)

(CN101)

12

7

wire (flat type) (8 core)

8

DRIVER board

5

s

crew (+BVTP 2.6

2

wire (flat type) (13 core)

(CN702)

(CN502)

1

×

8)

wire (flat type) (25 core)

(CN501)

6

4

VIDEO board

3

two s

crews (+BVTP 3

×

10

2-12. MOTOR BOARD, ADDRESS SENSOR BOARD

8

screw (+PTPWH 2.6

MOTOR board

6

3

0

9

tray

screw (+BVTP 2.6

×

8)

×

8)

2

two screws (+BVTP 2.6

1

qa

ADDRESS

HCD-VX888

×

8)

4

wire (flat type) (8 core)

(CN721)

Remove the two solderings of motor.

5

connector

SENSOR board

7

Pull-out the disc tray.

13

HCD-VX888

SECTION 3

TEST MODE

[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. Press three buttons x , ENTER , and ?/1 simultaneously.

2. The fluorescent indicator tube becomes blank instantaneously,

and the set is reset.

[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. Press three buttons x , ENTER , and DISPLAY

simultaneously.

2. The fluorescent indicator tube becomes blank instantaneously,

and the set is reset.

[Tuner Step Change]

• A step of AM channels can be changed over between 9 kHz and 10 kHz.

Procedure:

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

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

to select the BAND “AM”.

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

4. Press ENTER and ?/1 buttons simultaneously, and the display

of fluorescent indicator tube changes to “AM 9 k STEP” or “AM 10 k STEP”, and thus the channel step is changed over.

[Function Change Mode]

• Select either VIDEO or MD of the external FUNCTION input.

Procedure:

1. Turn on the power.

2. Hold down MD (VIDEO) button then press ?/1 button , and

release ?/1 button first in order not to switch off the set immediately. The another function of the previous function is selected , the input level is also changed and displayed “ MD ” or “VIDEO”.

[GC Test Mode]

• This mode is used to check the software version, FL tube, LED, keyboard and VACS.

Procedure:

1. Press three buttons x , ENTER , and DISC 2 simultaneously.

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

3. When you want to enter the software version display mode,

press DISC 1 . The model number and destination are displayed.

4. Each time DISC 1 is pressed, the display changes starting

from MC version, GC version, CD version, CDD version, CDM version, BD version, ST version, TC version, TA version and TM version in this order, and returns to the model number and destination display.

5. When DISC 3 is pressed while the version numbers are being

displayed except model number and destination, year, month and day of the software creation appear. When DISC 3 is pressed again, the display returns to the software version display . When DISC 1 is pressed while year, month and day of the software creation are being displayed, the year, month and day of creation of the software versions are displayed in the same order of version display.

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

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

“K0 V0”. Each time a button is pressed, “KEY” value increases. However, once a button is pressed, it is no longer taken into account. “VOL” value increases like 1, 2, 3 ... if rotating VOLUME knob in “+” direction, or it decreases like 0, 9, 8 ... if rotating in “–” direction.

8. Also when DISC 3 is pressed after lighting of all LEDs and FL tubes, value of VACS appears.

9. To e xit from this mode, press three b uttons in the same manner as step 1, or disconnect the power cord.

[MC Test Mode]

• This mode is used to check operations of the respective sections

of Amplifier, Tuner , and T ape.

Procedure:

* To enter MC Test Mode

1. Press the ?/1 button to turn on the set.

2. Press the three buttons of x , ENTER and DISC 3 simultaneously.

3. The messages MUSIC, MOVIE, GAME and P FILE flash on the FL display tube. The input FUNCTION is Changed to VIDEO.

* Check of Amplifier

1. When v (CURSOR UP) button is pressed, GEQ increases to its maximum and a message “GEQ MAX” appears.

2. When V (CURSOR DOWN) button is pressed, GEQ decreases to its minimum and a message “GEQ MIN” appears.

3. When b (CURSOR LEFT) or B (CURSOR RIGHT) button is pressed, GEQ is set to flat and a message “GEQ FLAT” appears.

4. When the VOLUME control knob is turned clockwise even slightly, the sound volume increases to its maximum and a message “VOLUME MAX” appears for two seconds, then the display returns to the original display.

5. When the V OLUME control knob is turned counter-clockwise even slightly , the sound volume decreases to its minimum and a message “VOLUME MIN” appears for two seconds, then the display returns to the original display.

* Check of clock frequency

1. To check the frequenc y of clock used to run the time in the unit, the clock output is available at pin 39 (IC 501, MASTER CONTROL) only during MC test mode.

2. The frequency is 32.768 kHz or so.

* Tuner function

1. In the test mode, the default-preset channel is called even when the TUNER is selected and an attempt is made to call the preset channel that has been stored in memory. (It means that the memory is cleared.)

2. The minimum, center and maximum frequency of each band is set then.

14

HCD-VX888

k

* T ape function

1. When a tape is inserted in Deck B and recording is started, the input source function selects VIDEO automatically. When CD SYNC/HI-DUB button is pressed during Rec in function, ALC is turned on.

2. When x button is pressed to stop recording, the Tape (Deck)

B is selected and tape is rewound, tape is rewound using m button, tape is stops at around the record-starting position and playback of the recorded portion of the tape is started. If P A USE is inserted even once during recording, tape is rewound to the position around the PAUSE position and is played back.

3. When CD SYNC / HI-DUB button is pressed during playback

of Deck B, either normal speed or high speed can be selected by this button.

* AMS Test Mode

1. Set TAPE function

2. Select the desired loop by pressing the PLA Y MODE b utton.

Insert a test tape AMS-110A or AMS-120 to Deck A.

3. Press the SPECTRUM button to enter the AMS test mode.

4. After a tape is rewound first, the FF AMS is checked, and the

mechanism is shut off after detecting the AMS signal twice.

5. Then the REW AMS is checked and the mechanism is shut off

after detecting the AMS signal twice.

6. When the check is complete, a message of either OK or NG

appears.

* To return to normal mode again.

1. When you want to exit this mode, press the ?/1 button.

2. The cold reset is enforced at the same time.

[VACS ON/OFF Mode]

• This mode is used to switch ON and OFF the VACS (Variable

Attenuation Control System).

Procedure:

Press the ENTER and SPECTRUM buttons simultaneously. The message “VACS OFF” or “VACS ON” appears.

[CD Aging Mode]

Procedure:

1. Short SL501 by soldering.

2. Turn on the main power. Set a disc on the DISC1 tray. Select

CD.

3. Press the SELECT/gG button. The aging mode starts.

4. Aging status appears on the monitor screen.

How to exit the CD aging mode:

1. Press the ?/1 and turn off the main power.

2. Remove soldering from SL501.

[Function Change Mode]

Select either VIDEO or MD of the external FUNCTION input.

Procedure:

1. Turn on the power.

2. Press the two buttons ENTER and ?/1 at the same time. The main power is turned on and the other function of the previous function is selected and displayed. “MD” or “VIDEO”.

[VIDEO CD Color-bars Mode]

On this mode, the data of the color-bars signal as a picture signal and the 1 kHz sine wave signal as a sound signal are output by the mechanism controller (IC502) for the video CD signal check. When measurement of the voltage and waveform on the VIDEO board, perform it in this mode. For reference, the color-bars signal can be observed at CN301 pin 2 using an oscilloscope.

Procedure:

1. Short the both ends of the land of SL503 of the VIDEO board.

2. Turn the power on. Press the CD button to select CD.

3. The color-bars appears when the CD is in stop status, and it

disappears when the CD goes in play status.

4. After measuring, remove the lead wire connected.VIDEO board

(SIDE B)

[CD Servo ON/OFF Mode]

Procedure:

1. Short SL502 on the VIDEO board by soldering.

2. Turn on the main power. Set a disc on the DISC1 tray. Select CD.

3. Press the hH button to play back CD.

4. When the > + button is pressed, 100 track jump is executed.

5. Also, every pressing of the PLAY MODE button triggers between ON and OFF of TRACKING SERVO and SLED SERVO.

How to quit the CD servo ON/OFF mode:

1. Press the ?/1 button to turn off the main power.

2. Remove soldering from SL502.

TOC reading

Last track is played back

First track is played bac

OPEN

CLOSE

Monitor Display

1st line OPEN/CLOSE/CD PLAY display 2nd line DISC1/DISC1-15/DISC1-1/TIME display 4th line COUNT : 1 display 5th line TOTAL ERR : 00 display 6th line JITTER FF display 3rd line AGING

15

HCD-VX888

[ VIDEO BOARD ] (SIDE A)

J301

CN501

1 2 3

CN301

SL503

SL502

SL501

CHECK LED

CN502

CN503

16

SECTION 4

r

MECHANICAL ADJUSTMENTS

HCD-VX888

SECTION 5

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

FWD

FWD back tension

REV

REV back tension

FF/REW

FWD tension

REV tension

CQ-102C

CQ-102RC

CQ-201B

CQ-403A

CQ-403R

Meter reading

3.06 N • m to 6.96 N • m 31 to 71 g • cm

(0.43 – 0.98 oz • inch)

0.19 N • m to 0.58 N • m

2 to 6 g • cm

(0.02 – 0.08 oz • inch)

3.06 N • m to 6.96 N • m 31 to 71 g • cm

(0.43 – 0.98 oz • inch)

0.19 N • m to 0.58 N • m

2 to 6 g • cm

(0.02 – 0.08 oz • inch)

6.96 N • m to 14.02 N • m 71 to 143 g • cm

(0.98 – 1.99 oz • inch)

9.80 N • m

100 g or more

(3.53 oz or more)

9.80 N • m

100 g or more

(3.53 oz or more)

DECK SECTION

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.

• 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-L300J 315 Hz, 0 dB Level Adjustment

Record/Playback Head Azimuth Adjustment

0 dB=0.775 V

DECK A DECK B

Note: Perform this adjustments for both decks

Procedure:

1. Mode: Playback

test tape P-4-A100 (10 kHz, –10 dB)

set

main board CN301 Pin

3

(L-CH)

1

(R-CH)

main board CN301

2

(GND)

level mete

+ –

17

HCD-VX888

e

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

R-CH peak

within 1dB

Screw position

L-CH peak

Screw position

R-CH peak

3. Mode: Playback

test tape P-4-A100 (10 kHz, –10 dB)

L-CH

MAIN board CN301 set

R-CH

waveform of oscilloscope

in phase 45°90°135°180

L

R

good

3

1

2

oscilloscop

V

wrong

H

°

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

Adjustment Location: Playback Head (Deck A).

Record/Playback/Erase Head (Deck B).

Tape Speed Adjustment

Note: Start the Tape Speed adjustment as below after setting to the test

mode. In the test mode, the tape speed is high during pressing the

DECK B

CD SYNC/HI-DUB button.

Procedure:

1. Turn the power switch on.

2. Press the x button, ENTER button and DISC 3 button simultaneously. (The “TEST MODE” on the fluorescent indicator tube display while in the test mode.) To exit from the test mode, press the ?/1 button.

Mode: Playback

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

set

main board CN301 (Pin

frequency counter

3

: L-CH)

1

: R-CH)

(Pin

+

–

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

2. Press the gG button on the deck B.

3. Press the CD SYNC/HI-DUB button in playback mode. Then at HIGH speed mode.

4. Adjust RV1001 on the LEAF SW board so that frequency counter reads 6,000 ± 30 Hz.

5. Press the CD SYNC/HI-DUB button. Then back to NORMAL speed mode.

6. Adjust RV1002 on the LEAF SW board so that frequency counter reads 3,000 ± 15 Hz.

Adjustment Location: LEAF SW board

Playback level Adjustment

DECK A DECK B

Procedure:

Mode: Playback

test tape P-4-L300J (315 Hz, 0 dB)

level meter

forward

reverse

3 1

+

–

: L-CH) : R-CH)

set

main board CN301 (Pin

(Pin

1. Confirm that level difference between the channels is with ±

0.5 dB.

2. After check, adjust the following RVs. Deck A is RV302 (L-CH), Deck B is RV303 (L-CH) so that adjustment within adjustment level as follows.

Adjustment Level:

CN301 PB level: 334.4 to 748.7 mV (–7.3 to –0.3 dB)

Adjustment Location: MAIN board

Sample Volue of Wow and Flutter: 0.3% or less W. RMS

(WS-48B)

18

HCD-VX888

e

r

set

MD/VIDEO (AUDIO) IN (J101) 315 Hz, 50 mV (–23.8 dB)

blank tape CS-123

600

Ω

attenuator

AF OSC

+

–

set

recorded portion

CN301 (Pin

3

: L-CH)

(Pin

1

: R-CH)

level meter

REC Bias Adjustment DECK B

Procedure:

In the MC test mode, the “REC memory mode” is convenient for this adjustment. In the “REC memory mode” , when the REC starts the input signal FUNCTION is switched to VIDEO automatically. When the REC stops, the tape returns near to the recording start position.

1. Press MD (VIDEO) button to select VIDEO. (This step is not necessary if the above test mode has already been set.)

2. Insert a tape into deck B.

3. After press REC P AUSE/STAR T b utton, press REC PAUSE/ START button, then recording start.

4. Mode: Record

MD/VIDEO (AUDIO) IN (J101)

1) 315 Hz

2) 10 kHz

AF OSC

attenuator



50 mV (–23.8 dB)

 

600

Ω

blank tap CN-123

set

5. Mode: Playback

recorded portion

set

level mete

+

–

4. Mode: Record

5. Mode: Playback

6. Confirm the play back signal recorded in step 3 becomes adjustable level as follows. If these levels are not adjustable level, adjust the RV301 (LCH) and RV351 (R-CH) on the MAIN board to repeat steps 4 and 5.

Adjustable level:

CN301 PB level: 47.2 to 53.0 mV (–24.3 to –23.3 dB) Adjustment Location: MAIN board

[MAIN BOARD] (Component Side)

CN301 (Pin

(Pin

3 1

: L-CH) : R-CH)

6. Confirm the playback signal recorded in step 3 becomes adjustable level as follows. If these levels are not adjustable level, adjust the RV304 (LCH) and R V354 (R-CH) on the MAIN board to repeat steps 4 and 5.

Adjustable level: Playback output of 315 Hz to playback output

of 10 kHz: ±1.0 dB

Adjustment Location: MAIN board

REC Level Adjustment DECK B

Procedure:

In the MC test mode, the “REC memory mode” is convenient for this adjustment. In the “REC memory mode” , when the REC starts the input signal FUNCTION is switched to VIDEO automatically. When the REC stops, the tape returns near to the recording start position.

1. Press MD (VIDEO) button to select VIDEO. (This step is not necessary if the above test mode has already been set.)

2. Insert a tape into deck B.

3. After press REC P AUSE/STAR T b utton, press REC PAUSE/ START button, then recording start.

T11

RV11

PB LEVEL (L)

(A)

PB LEVEL (L)

(B)

REC LEVEL (R)

(B)

REC BIAS (L)

(B)

[LEAF SW BOARD] (Component Side)

TAPE SPEED





(NORMAL) (HIGH)

RV1002

RV1001

REC LEVEL (L)

CN301

3

1

RV351

RV304

REC BIAS (R)

CN1001

(B)

CN304

RV301

RV302

RV303

NO303

RV354

(B)

19

HCD-VX888

TP(RFAC) TP(DVC)

BD board

oscilloscope

TUNER SECTION

FM Tuned Level Adjustment

FM RF SIGNAL GENERATOR

Ω

coaxial

75

set

Carrier frequency : 98 MHz Modulation : AUDIO 1 kHz, 75 kHz deviation (100%) Output level : 28 dB (at 75

Ω

open)

Procedure:

1. Supply a 98 MHz signal at 28 dB from the ANTENNA terminal.

2. Tune the set to 98 MHz.

3. Adjust RV11 to the point (moment) when the TUNED indicator will change from going off to going on.

Adjustment Location: MAIN board

Null Adjustment

FM RF SIGNAL GENERATOR

75

Ω

coaxial

FM ANTENNA terminal (TM1)

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 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(FEO) TP(DVC)

Procedure :

1. Connect oscilloscope to TP (FEO).

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

3. Turn Power switch on.

4. Load a disc (YEDS-18) 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 4 ±1 Vp-p.

set

Carrier frequency : 98 MHz Modulation : AUDIO 1 kHz, 75 kHz deviation (100%) Output level : 60 dB (at 75

Ω

open)

FM ANTENNA terminal (TM1)

Procedure:

1. Supply a 98 MHz signal at 60 dB from the ANTENNA terminal.

2. Tune the set to 98 MHz.

3. Measure voltage between pin 22 and pin 3 of IC11. Adjust T11 until the voltage becomes 0 V.

Adjustment Location: MAIN board

Adjustment Location

[MAIN BOARD] (Component Side)

NULL

T11

RV11

FM TUNED LEVEL

CN301

3

RV351

RV301

1

RV304

CN304

RV302

RV303

NO303

RV354

S-curve waveform

symmetry

A

within 4 ±1Vp-p

B

7. 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

Procedure :

1. Connect oscilloscope to TP (RFAC).

2. Turned Power switch on.

3. Load a disc (YEDS-18) and playback.

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

5. Measure the RFDC in the same way.

20

HCD-VX888

r

IC103

IC101

TP (RFDC)

TP (FEO)

TP (TEO)

TP (DVC)

TP (RFAC)

17

TP (VC)

TP (XPCK)

TP

(FEI)

)

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

clearly distinguished at the center of the waveform.

RF signal waveform

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

level : 1.1 ± 0.3Vp-p

E-F Balance (1 Track jump) Check

oscilloscope

BD board

TP (TEO) TP (DVC)

+ –

Procedure:

1. Connect an oscilloscope to TP (TEO) and TP (DVC).

2. Turned Power switch on.

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

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

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

Adjustment Location :

[ BD BOARD ] — SIDE B —

1 track jump waveform

B

0V

level=1.3 ±0.6Vp-p

Specification level: x 100=less than ±22%

A

B

Symmetry

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

RF PLL Free-run Frequency

Procedure :

1. Connect frequency counter to test point (XPCK) with lead wire.

BD board

TP (XPCK)

2. Turned Power switch on.

3. Put the disc (YEDS-18) in to play the number five track. Confirm that reading on frequency counter is 4.3218MHz.

frequency counte

+

–

Center of waveform

A (DC voltage

21

HCD-VX888

r

VIDEO SECTION

Frequency Adjustment

Connection:

VIDEO board

(27 MHz)

frequency counte

Procedure:

1. Connect the frequency counter to check point of the VIDEO board.

2. Turned power switch on.

3. Press the CD 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:

[VIDEO BOARD] (SIDE A)

J301

IC507

CN501

CN502

(27MHz)

(GND)

CT503 VIDEO Frequency Adjustment

CN503

22

SECTION 6

DIAGRAMS

HCD-VX888

6-1. BLOCK DIAGRAM – TUNER/CD Section –

TM1

FM 75Ω

G

AM

2

11

OPTICAL PICK-UP

BLOCK

(A-MAX.3)

VC

VCC

PD1

PD2

I5-10

I1-6

LD

LD GND

GND

PD

SW

F+

F-

T+

T-

1

ANT IN

RB41

+5V

FE1

OSC OUT

Q101

LD

DRIVE

IF OUT

VT

1

M102

SLED

MOTOR

M101

SPINDLE

MOTOR

AM/FM IF MPX

FM IF

AM/IF

AM OSC

VCO STOP

IF REQ MUTING

AM RF IN

AM OSC

VCC

AFC

IC501

56 9

2

IC11

L OUT

R OUT

AM IF IN

AM MIX OUT

TUNED

STEREO

10

VIDEO CD CONTROL

11

CTRL1

95

DSP DATA

5

DSP CLK

97

DSP LATCH

10

DSP MUTING

84

SUBQ DATA

83

SUBQ CLK

1

SENSE

2

SENSE CLK

18

SCOR

82

LD ON

77

DEVICE RESET

28

PWM1 (BD)

26

PWM2 (BD)

24

PWM3 (BD)

13

14

4

2

6

7

8

IC502 (1/2)

I2C.DATA

I2C.CLK

Q11

BUFFER

R-CH

IFT11

30

29

7

8

5

10

8

7

3

6

9

RF AMP

IC103

14

VC

VFC

A

B

C

D

E

F

LD

PD

VO1(-)

VO1(+)

VO2(-)

VO2(+)

VO3(+)

IC102

DVC

RFAC

RFDC

SW

RFDCI

FEI

IN1+

IN1-

IN2+

IN2-

IN3+

15

28

16FE

18TE

12

17

29

35

34

32

31

27

25

6

7

8

9

10

11

1

2

MOTOR/COIL DRIVE

52

47

56

55

1

CF1 CF2

+B

(+11.7V)

X51

4.5MHz

M

2

5

VO3(-)

VO4(+)

IN3-

26

IN4R

24 MDP

M

10

VO4(-)

STBY

8

Q1

RF IF AMP

Q2

A+12V

FM

10

XIN

1

XOUT

22

FM OSC

16

A IN

19

A OUT

20

PD

18

DIGITAL SIGNAL PROC.

38

42

50

43

39

41

40

26 SSTP

33

34

31

32

29

30

25

+B (+7.4V)

IC51

PLL

FM

AM OSC

VCO STOP

IF REQ

IF IN

DO

DI

CL

CE

DIGITAL SERVO

IC101

VC

CE

D OUT

RFAC

RFDC

PCMD FE

TE

SE

FFDR

FRDR

MUTING

TFDR

TRDR

SFDR

SRDR

BCLK

LRCK

C2PO

XTAI

XTSL

DATA

CLOK

XLAT

SQSO

SQCK

SENS

SCLK

SCOR

XRST

RV11

7

15

9

8

12

6

4

5

3

DO

DI

CL

CE

64

1234

66

67

65

14

IC106

71

69

4

6

5

3

76

77

7

8

15

2

4

CTRL1(1-2)

DATA

MUTING

SQSO

SQCK

SENS

SCLK

SCOR

1

11

24

12

10

21

23

22

13 12 11

CLK

XLT

LDON

XRST

PWM1

PWM2

PWM3

CD DATA

CD BCK

CD LRCK

C2PO

LPF11

LPF

IC201

OPTICAL

DIGITAL

OUT

DIGITAL OUT

MCLK

IIC DATA

IIC CLK

DISPLAY/POWER

+3.3V

CD

B

VIDEO CD

SECTION

(Page 25)

C

VIDEO CD

SECTION

(Page 25)

D

SECTION

(Page 26)

L-CH

Q103,D101

MAIN

SECTION

(Page 24)

+3.3V

REG.

A

SYSTEM CONTROLLER

TUNED

3

STEREO

2

ST MUTING

21

DO

DI

CL

CE

+5V

ST DIN

25

ST DOUT

23

ST CLK

27

ST CE

22

BU UP/DOWN SW

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

• Signal Path

: FM

: CD

: DIGITAL OUT

IC501 (1/3)

LOAD IN

44

45LOAD OUT

T SENS

49

OPEN SW

CLOSE SW

46

47

48

IC701

9

MOTOR

DRIVE

7

TBL ADDRESS

4

2

IC711

SENSOR

M

S701

OPEN/CLOSE

S711

BU UP/

DOWN

M721 TURN

MOTOR

2323

HCD-VX888

6-2. BLOCK DIAGRAM – MAIN Section –

A

E

J101

L

R

J601

L

R

G

J401

J402

L

R

57

R-CH

57

R-CH

L-CH

LOUT

L-CH

R-CH

PB EQ

AMP

IC303

PB EQ

AMP

IC304

C332, L301

BIAS

TRAP

RV304

REC

BIAS

T301

RV302

PB

LEVEL (A)

RV303

PB

LEVEL (B)

1

2

3

BIAS

OSC

Q302, 303

B+

(TCA+6V)

INPUT SELECT

IC105

11

9 10

AB

Q104

VIN2

3

VIN1

1

AUDIO SWITCH

3

REC/PB SWITCH

IC302

R-CH

Q301

Q141

DC

BIAS

VIDEO SWITCH

IC781

2

SW1

IC401

CONTROL

9 10

SWITCH

CONTROL

Q401

SWITCH

4

Q304, 305

(TC+12V)

A+12V

GAME INPUT

HP901

PB

HEAD

HRPE901

REC/PB

HEAD

ERASE

HEAD

TUNER/CD SECTION

(Page 23)

VIDEO/CD SECTION

(Page 25)

MD/VIDEO

(AUDIO)

AUDIO

VIDEO

VIDEO CD SECTION

(Page 25)

VIDEO OUT

AUDIO OUT

DECK-A

DECK-B

GRAPHIC EQUALIZER CONTROL,

ELECTRICAL VOLUME

IC101

IN 2A

38

IN 2C

371312

IN 2D

V OUT

7

VIDEO

SWITCH

1

48

A

B

46

REC

36 38

EQ

B+

NORM

33

CROM

32

DISPLAY/POWER

L

SURROUND SWITCH

REC

70

120

PB AMP, REC EQ AMP,

DOLBY B NR

IC301

LEVEL (L)

BIAS

SW

M901

CAPSTAN

MOTOR

SECTION

(Page 26)

IC103

SURROUND

SWITCH

BP/SR

CONT2

RV301

REC

A

MM

—

321

CONT3

43

REC

PB

39

(A. 120/70)

B

+

IC104

1

S1004

S1008

Q1001

MOTOR

CONT

VSELA

34107

IN2

3

2

DOLBY

B

DOL

PAS

RV1002

NORM SPEED

RV1001

HIGH SPEED

LM ON/OFF

REC/PB/PASS

NR ON/OFF

RM ON/OFF

BIAS ON/OFF

ALC ON/OFF

NORM/HIGH

A120/70

17 19

CAP MOTOR

SPEED CONT

CAP MOTOR

2440

VOL OUT2

21

DATA

22

CLOCK

IN 2B

3935

INVOL OUT2

BP/SR CONT2 CONT3

40

PB

26

MS OUT

25 24 23 22

20 15 18

PB A/B

16

B NORM/CROM/METAL

Q395

Q396, 397

DRIVE

CLK

GEQ

5

SUR1

6

SUR2

7

SUR3

78

GAME/VIDEO

1 AUDIO OUT ON/OFF

53

AMS IN

58

TC MUTE

59

REC/PB/PASS

60

NR ON/OFF REC MUTE

61

BIAS

65

ALC

68

EQ H/N

66

PB A/B

67

51

A TRIG

B TRIG

52

69

TC RELAY

IC102

6

– +

5

Q101, 102

DBFB CONT

Q503

DBFB

SWITCH

8081

GEQ

DATA

SYSTEM CONTROLLER

79

DBFB

ON/OFF

IC501 (2/3)

7

R-CH

Q504, 505

MUTING

CONT

Q503, 504

MUTING

82 83 87 88

STK MUTE

LINE MUTE

85

REAR

FRONT MUTE

BOOSTER SW

STBY LED

POWER KEY

DISPLAY KEY

MUTING

Q103

CONT

PROTECT

RELAY

FREQ A FREQ B

A PLAY

B PLAY

A HALF

B HALF

A SHUT

B SHUT

A TRIG

B TRIG

18

MUTING

Q581

RELAY DRIVE

Q831, 832

CONT-A

95

CONT-B

94

BOOSTER SW

97

STAND-BY LED

75

74

73

56

57

70

91

89

90

51

52

IC501

POWER

10

AMP

12

D841

IC701

31

Q861

MUTING

CONT

OVER LOAD

DETECTOR

+B

(+30V)

TH701

S796

I/1

S752

DISPLAY

REEL DET

IC1001

REEL DET

IC1002

A TRIG. DRIVE

Q393, 394

B TRIG. DRIVE

Q391, 392

Q551

LED

DRIVE

Q794

MUTING

Q862

R-CH

Q505, 506

OVER HEAT DETECTOR

S1001

(A PLAY)

S1002

(B PLAY)

S1003

(A HALF)

S1006

(B HALF)

S1005

(REC A)

S1009

(REC B)

(DECK-A)

(DECK-B)

R-CH

Q821, 822

PROTECT

DETECTOR

D794

I/1

A TRG M+

B TRG M+

Q824, 825

D502

Q831

FAN ON

SWITCH

Q823

PROTECT

CONT

Q828, 829

PROTECT

SWITCH

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

• SIGNAL PATH

: PB (DECK A)

: PB (DECK B)

: REC (DECK B)

: FM

: CD

: VIDEO

RELAY DRIVE

RY801

R-CH

+

R-CH

Q891, 892

DRIVE

R-CH

FAN

HEADPHONE

SW

MOTOR B+

PROTECT

LINE-MUTE

STK-MUTE

PROTECT

RELAY-ON/OFF

CONT-A

CONT-B

BOOSTER SW

STAND-BY LED

MIC SIG

SPEANA

+

TM801

+

M961 (FAN)

L-IN

L

R

H

I

CN101

12

7 6 5

8

3 2 1 4

J

K

SPEAKER

IMPEDANCE

USE 6-16Ω

J631

PHONES

DISPLAY/POWER

SECTION

(Page 26)

DISPLAY/POWER

SECTION

(Page 26)

TO SATELLITE AMPLIFER (TA-DX80)

DISPLAY/POWER

SECTION

(Page 26)

DISPLAY/POWER

SECTION

(Page 26)

2424

6-3. BLOCK DIAGRAM – DISPLAY/POWER Section –

HCD-VX888

TUNER/CD

SECTION (Page 23)

CN503

(TO FLASH WRITER)

TXD

SCLK

BUSY

RXD

RST

PGM

XWR

HOLD

DISPLAY/POWER

SECTION (Page 26)

CD DATA/CD BCK/CD LRCK/C2PO

B

XRST

F

VIDEO CD CONTROL

IC502 (2/2)

CHROMA LEVEL

DAC RESET

DATA1I

32

CLK1

33

RTS1

34

DATA1O

31

XRESET

12

CNVSS

9

BUS XWRL

46

BUS XHOLD

41

DATAI

DATAO

DF LATCH

CLK1

CL680 INTERRUPT

CL680 HSEL

CL680 HRDY

680 RESET

XOUT

BGP

XIN

22

65V.MUTING

66

36

35

88

37

21H SYNC IN

45V SYNC

20

87

85

86

15

13

+5V

Y AMP IC303

3RESOLUTION

L.P.F

4

MPEG VIDEO/AUDIO DECODER

112

119

117

Q501

BUFFER

Q502

BUFFER

X501

10MHz

Q531

+3.3V REG

(IC505 VDD)

101

93

114

121

113

60

+3.3V

Q301

VIDEO SIGNAL PROC.

IC505

4

CD DATA

3

CD BCK

5

CD LRCK

6

CD C2PO

HD OUT

HD IN

HCK

H SYNC

V SYNC

HINT

HSEL

HRDY

RESET

Y OUT

C OUT

DA DATA

DA BCK

DA LRCK

DA XCLK

VCK IN

MD0

MD15

MA0

MA10

RAS0

CAS

MWE

MCE

L.P.F

D/A CONV

DIGITAL FILTER

IC509

10

RSTB

9

MD

V OUT L

V OUT R

DRAM

IC507

A0

A8

RAS

UCAS

LCAS

WE

ROM

IC510

A0

A10

CE

DQ1

DQ16

O0

O7

A11

ı

A17

XT1

XT2

14

11

R-CH

1

X503

27MHz

24

2 5

.

7

10

.

31

34

.

36

39

13 15

.

17

21

.

25

.

4

.

28

.

29

.

3

.

2

.

30

8

MC

7

ML

69

75

110

111

108

86

106

10 15

.

17

.

19

.

21

.

23

29

58

56

.

54

.

52

50

.

48

.

46

44

42

40

38

37

IC504

27MHz

18

DATA

17

BCK

19

LRCK

111098

20

384FSO

3456

4

MCKO

16

19

.

22

26

14

28

29

13

12

5

.

27

.

26

.

23

22

5

CCT

VIN

C AMP

IC302

TINT

BGP

VIN

IC101

L. P. F.

VOUT

1VOUT

6

75

10

8

5

1

2

7

1

8

Y IN

C IN

MUTE A

MUTE B

Y/C DECODER

IC304

C OUT

15Y OUT1

14Y OUT2

9

12MIX OUT1

11MIX OUT2

Y

4

3

C

2

1

VMP-VIDEO IN

J301

S VIDEO

OUT

LOUT

MCLK

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

• Signal Path

: CD

: VIDEO

G

E

C

MAIN SECTION (Page 24)

TUNER/CD

SECTION (Page 23)

2525

HCD-VX888

6-4. BLOCK DIAGRAM – VIDEO CD Section –

MAIN SECTION

(Page 24)

MAIN SECTION

(Page 24)

MAIN SECTION

(Page 24)

J721

MIC 2

J722

MIC 1

MAIN SECTION

(Page 24)

TUNER/CD SECTION

(Page 23)

HEADPHONE SW

H

VIDEO SWITCH

L

SPEANA

K

MIC SIG

J

D

IIC DATA IIC CLOCK

IC722 (1/2)

DISPLAY CONTROLLER,

LED DRIVE

IC601

78

HEADPHONE

VIDEO

76

IC602

SPEANA

BPF

S768 – 781

FUNCTION

KEY

S753 – 767

FUNCTION

KEY

S601 – 606 S791 – 795

FUNCTION

KEY

ROTARY

ENCODER

17

ı

12

113

X601 4MHz

6 5 4

IC722 (2/2)

6

1

DIGITAL

ECHO AMP

IC721

2 9LPFIN

LPF2

OUT

73

S751

VOLUME

SWITCH

71

BPF 0

ı

67

BPF 5

72

73

ALL BAND

64

KEY0

65

KEY1

66

KEY2

80

VOL A

79

VOL B

83

XIN

82

XOUT

60 IIC DATA 61 IIC CLOCK 77 RESET

REC/PAUSE

P1

P39

G1

G13

TUNER

TAPE A/B

MD/VIDEO

GAME IN

DISC1 DISC2 DISC3

ENTER

VKK

6

ı

10

F1 F2

12

ı

22

ı

24

ı

41 43

ı

47

5

ı

1

ı

100

ı

93

55

CD

57 54 56 58

59 74 75

52

53

48

FL601

FLOURESCENT

INDICATOR TUBE

S601 – 605

LED

DRIVER

S791 – 793

LED

DRIVER

Q751

LED

DRIVER

Q752

LED

DRIVER

–VG

D608, 609

D612 – 618

D791 – 793

• Abbreviation E3: 240V AC Area in Emodel E91: 220V AC Area in Emodel EA: Saudi Arabia model SP 2/6: Singapore model IA: Indonesia model

D751

PAUSE REC/START

D752

ENTER

MAIN SECTION

(Page 24)

VIDEO CD SECTION

(Page 25)

PROTECT MOTOR B+

I

Q941

+VH

–VH

+VL

–VL

REG

D543

D541

D901 – 904

D906 – 909

D972 – 975

Q971

RELAY DRIVE

–V

D822

POWER

AMP

(IC501)

B+

IC971

+5.7V

3 1

REG

–VG

(–32.2V)

A+12V

412930

IIC CLK

IIC DATA

M RESET

CD POWER

SYSTEM CONTROLLER

IC501 (3/3)

XRST

F

XRST

STBY RELAY

XC IN XC OUT X IN X OUT

10

11

15

RESET

AC CUT

SIRCS

13

38

Q575

3 11243

100

84

4

TC A+12V

MIC A+12V

ST A+12V

CD D+5V (SW)

CD A+5V (SW)

TC D+5V

AUDIO +5V

VREF (IC501)

D +5V

VCC (IC501)

TC M+9V

CDM M+7V

LED +7V

STBY +5V

IC502

RESET SIGNAL

GENERATOR

REMOTE

CONTROL

RECEIVER

IC603

D579 D580

D920 – 922

D577

3 1

D952

D953 D509

D510

D508

IC911

+5V REG

D511

+3.3V

IC921

+12V

3 1

REG

Q911, 912

CD POWER

SWITCH

IC951

+5V

3 1

REG

IC961

+9V

3 1

REG

IC616

+3.3V

3 1

REG

D824

D911

EVER +5.7V

D910

(+13.9V) (RY801)

D977

TRANSFORMER

F1

F2

TRANSFORMER

RY971

T910

POWER

T972

POWER

(EXCEPT E91)

JW973

JW972

F971

JW990

(EXCEPT E91)

JW986

(E91)

(EXCEPT E91)

(E91)

JW974

S901

VOLTAGE SELECTOR

120

220

230 – 240

120

220

230 – 240

(EXCEPT E91)

RY972

(EXCEPT IA)

AC OUT

TO

SATLLITE

AMPLIFIER

(TA-DX80)

AC IN

X501

32.768kHz

X502

16MHz

2626

Sony HCDVX-888 Service manual

TABLE OF CONTENTS

GENERAL

2-1. DISASSEMBLY FLOW

DISASSEMBLY

case (Top)

loading panel

CD mechanism deck (CDM58E-30BD61A)

front panel section

2-6. TAPE MECHANISM DECK (TCM-230AWR41)

back panel section

MAIN board

2-9. LEAF SW BOARD, HEAD (A) BOARD, HEAD (B) BOARD

base unit (BU-30BD61A)

TEST MODE

MECHANICAL ADJUSTMENTS

ELECTRICAL ADJUSTMENTS

DIAGRAMS

6-1. BLOCK DIAGRAM – TUNER/CD Section –

6-2. BLOCK DIAGRAM – MAIN Section –

6-3. BLOCK DIAGRAM – DISPLAY/POWER Section –

6-4. BLOCK DIAGRAM – VIDEO CD Section –