Sony HCD-VX88 Service manual

Amplifier section

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

(6 ohms at 1 kHz, DIN)

Continuous RMS power output (reference)

200 + 200 watts
(6 ohms at 1 kHz,
10% THD)

Inputs
MD/VIDEO (AUDIO) IN:voltage 450 mV/250 mV,
(phono jacks) impedance 47 kilohms
MIC: sensitivity 1 mV,
(phone jack) impedance 10 kilohms

Outputs
VIDEO OUT: max. output level 1 Vp-p,
(Phono jack) unbalanced, Sync

negative, load impedance

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

C: 0.286 Vp-p

load impedence 75 ohms
PHONES: accepts headphones of 8
(stereo mini jack) ohms or more
FRONT SPEAKER: accepts impedance of 6 to

16 ohms
SATELLITE SPEAKER: accepts impedance of 6 to

16 ohms

VIDEO CD/CD player section

System Compact disc and digital

audio system

Laser Semiconductor laser

(λ=780nm)
Emission duration:
continuous

Laser output Max. 44.6

µ

W*
*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.

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

NTSC, PAL

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) using Sony TYPE I

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

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 models: 531 – 1,602 kHz

(with the interval set at 9
kHz)

Other models: 531 – 1,602 kHz

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

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

450 kHz

HCD-VX88

SERVICE MANUAL

Ver 1.1 2001.08

HCD-VX88 is the tuner, tape pla yer, VIDEO CD/
CD player and amplifier section in MHC-VX88.

This stereo system is equipped with the Dolby B­type noise reduction system*.
* Manufactured under license from Dolby
Laboratories Licensing Corporation.
DOLBY and the double-D symbol ; are
trademarks of Dolby Laboratories Licensing
Corporation.

CD
Section

TAPE
Section

E Model

Model Name Using Similar Mechanism HCD-VX77
CD Mechanism Type CDM58-K2BD37A
Base Unit Name BU-K2BD37A
Optical Pick-up Name KSM-213DAP/Z-NP
Model Name Using Similar Mechanism HCD-VX77
T ape Transport Mechanism Type TCM-230AWR11

9-929-218-12 Sony Corporation

2001H0500-1 Home Audio Company
C 2001.8 Shinagawa Tec Service Manual Production Group

SPECIFICATIONS

COMPACT DISC DECK RECEIVER

— Continued on next page —

1

General

Power requirements
Thailand models: 220 V AC, 50/60 Hz
Other models: 120 V, 220 V or 230 - 240

Power consumption 250 watts

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

Mass: Approx. 11 kg

Design and specifications are subject to change
without notice.

V AC, 50/60 Hz
Adjustable with voltage
selector

mm (11

x 143/16 x 1611/

in.)

(24 lb. 5 oz)

TABLE OF CONTENTS

1. SERVICE NOTES ···························································· 4

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

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

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

16

5. MECHANICAL ADJUSTMENTS ····························· 17

6. ELECTRICAL ADJUSTMENTS ······························· 17

7. DIAGRAMS

7-1. Circuit Boards Location ··················································· 23
7-2. Block Diagrams ································································ 25
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 (1/3) Section – ················· 31
7-7. Schematic Diagram – VIDEO (2/3) Section – ················· 32
7-8. Schematic Diagram – VIDEO (3/3) Section – ················· 33
7-9. Printed Wiring Board – MAIN Section – ·························34
7-10. Schematic Diagram – MAIN (1/3) Section – ··················· 35
7-11. Schematic Diagram – MAIN (2/3) Section – ··················· 36
7-12. Schematic Diagram – MAIN (3/3) Section – ··················· 37
7-13. Printed Wiring Board – POWER AMP Section – ············ 38
7-14. Schematic Diagram – POWER AMP Section – ··············· 39
7-15. Printed Wiring Boards – PANEL Section –······················ 40
7-16. Schematic Diagram – PANEL Section – ·························· 41
7-17. Printed Wiring Boards – LEAF SW Section – ················· 42
7-18. Schematic Diagram – LEAF SW Section – ····················· 43
7-19. Printed Wiring Boards – DRIVER Section – ···················44
7-20. Schematic Diagram – DRIVER Section – ······················· 45
7-21. Printed Wiring Board – TRANS Section –······················· 46
7-22. Schematic Diagram – TRANS Section – ·························47
7-23. IC Pin Function Description············································· 48
7-24. IC Block Diagrams ··························································· 57

8. EXPLODED VIEWS ······················································62

9. ELECTRICAL PARTS LIST ······································· 68

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.

2

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

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

MODEL IDENTIFICATION

— BACK PANEL —

MODEL

EXCEPT IA model
IA model

• Abbreviation
IA : Indonesian

PART No.

PART No.

4-225-040-7s
4-227-061-2s

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.

3

SERVICE NOTES

H

g

g

H

H

g

2

Panel board

: melted-connection point

SECTION 1

Note for installing the panel board

Hot melt

Screw hole

1

Cut the nine melted-connection points with cutting pliers.

Attach the panel board with
six screws (

+BVTP 2.6 × 8

)
after the board is removed once.
Do not tighten the screws excessively.

SELF-DIAGNOSIS

This model has the self-diagnosis function for the VIDEO and AUDIO decoder sections.
Connecting to the LED between TP522 and TP523 on the VIDEO BOARD.
Immediately after the power on, the self-diagnosis function searches each operation of IC’s around the CD mechanism control microcom­puter (IC502). and TP5
The results can be checked by LED of the VIDEO board.

Oscilloscope (Waveform) Symptom

No error

Li

ht

L

MPEG decoder (IC505)
error

2 time blinkin

L

[VIDEO BOARD] (SIDE A)

TP523 TP522

LED

IC505

91

90

65

64

100

1

32

33

MPEG decoder (IC505)
or

L

3 time blinkin

DRAM (IC507) error

4

LOCATION OF CONTROLS

• Front view

SECTION 2

GENERAL

ws

1

2 3 4 5

wh

wg

wfwd

wj
wk
wl
e;
ea
es
ed
ef
eg
eh
ej
ek
el

rf rh

rs

rar;

rd

rg

8

76

9
0
qa

qs
qd
qf

qg
qh
qj

qkql

w;
wa

1 DISC SKIP button
2 DISC 1 button and indicator
3 DISC 2 button and indicator
4 DISC 3 button and indicator
5 Z OPEN/CLOSE button
6 PREV button
7 NEXT button
8 RETURN button
9 CD disc tray
0 Fluorescent indicator tube
qa EDIT, TUNER MEMORY button
qs PLAY MODE, STEREO/MONO button
qd REPEAT, DOLBY NR button
qf DIRECTION button
qg CINEMA SPACE button
qh VOLUME knob
qj Shuttle knob
qk x button
ql hH button
w; PHONES jack
wa Tape deck-B
ws T APE A/B button
wd CD button
wf Function indicator
wg TUNER/BAND button
wh MD (VIDEO) button
wj ?/1 button and indicator
wk DISPLAY button
wl SPECTRUM button
e; EQ EDIT button
ea GROOVE button
es ECHO LEVEL knob
ed MIC LEVEL knob
ef MIC2 jack
eg MIC1 jack
eh g, G, f, F button and indicator
ej PICTURE EFFECT button
ek V-GROOVE button and indicator
el Tape deck-A
r; – . button
ra X button
rs > + button
rd KARAOKE PON button
rf CD SYNC HI-DUB button
rg REC PAUSE/START button and indicator
rh ENTER button

5

Step 3: Setting the

This section is extracted from
instruction manual.

Step 3: Setting the time

(continued)

time

You must set the time before using the timer
functions.

O

nN

X

2,4

1

Press CLOCK/TIMER SET.

The hour indication flashes.

NX x

v

bB

V

xMm>.

1
3,5

3 Press ENTER.

The minute indication flashes.

4 Press . or > repeatedly to set

the minute.

5 Press ENTER.

The clock starts working.

Tip

If you’ve made a mistake, start over from step 1.

To change the time

The previous explanation shows you how to set the
time while the power is off. To change the time
while the power is on, do the following:

1 Press CLOCK/TIMER SET.
2 Press . or > repeatedly to select

SET CLOCK.

3 Press ENTER.
4 Perform steps 2 through 5 above.

2

Press . or > repeatedly to set
the hour.

continued

Note

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

9

10

6

SECTION 3

DISASSEMBLY

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

COVER (TOP)

5 two screws

6 screw

(case3 TP2)

(case3 TP2)

8 side panel L

0 cover (TOP)

7 two screws

9 two screws

(BVTP 3 × 12)

(BVTP 3 × 8)

4 side panel R

3 two screws

(BVTP 3 × 10)

LOADING PANEL ASS’Y

CD mechanism deck (CDM58-K2BD37A)
1 Turn the pulley (S) in the direction of the arrow.

pulley (S)

1 two screws

(case3 TP2)

2 screw

(case 3 TP2)

3 loading panel ass’y

Front panel side

bottom view

2 Pull out the disc tray

7

FRONT PANEL SECTION, CD MECHANISM DECK (CDM58-K2BD37A)

4 screw

(BVTP 3 × 10)

qa CD mechanism deck

(CDM58-K2BD37A)

1 wire (flat type) (17 core)

(CN304)

4 screw

8

5 connector

(BVTP 3 × 10)

6 front panel section

(CN401)

2 two connectors

(CN 1, 2)

7 two screws

(BVTP 3 × 10)

9 wire (flat type) (13 core)

(CN201)

0 connector

(CN202)

BASE UNIT (BU-K2BD37A)

(Page 11)

DRIVER/MOTOR/SENSOR/

VIDEO BOARDS

(Page 11)

3 three screws

(BVTP 3 × 8)

TAPE MECHANISM DECK (TCM-230AWR11)

4 bracket (heat cam L)

3 screw

(BVTP 2.6 × 8)

5 five screws
(BVTP 2.6 × 8)

LEAF SW/HEAD (A)/HEAD (B) BOARDS

6 tape mechanism deck

(TCM-230AWR11)

1 screw
(BVTP 2.6 × 8)

2 bracket (heat cam R)

(Page 10)

8

)

PANEL BOARD

6 two

knobs (MIC)

2 two

screws

× 8

(BVTP2.6

1

vol knob

)

3

bracket (FR)

4

5 spring FR

FR knob

qs

panel board

8 t

hree claws

qa

three claws

q;

five claws

7 two

screws

(BVTP2.6

9

CD switch board

: melted-connection point

q;

Cut the nine melted-connection points
with cutting pliers.

Note: When attaching the panel board,
refer to "Service Notes" on page 4.

× 8

)

POWER TRANSFORMER (T971), TRANS BOARD

7 Remove six teen solders

of power transformer (T971).

8 TRANS board

4 connector

(CN977)

5 two screws
(BVTP 4 × 8)

6 power transformer

(T971)

4 connector

(CN975)

5 two screw
(BVTP 4 × 8)

2 connector

(CN891)

3 back panel

1 six screws

(BVTP 3 × 10)

1 two screws
(BVTP 3 × 10

9

d

MAIN/POWER AMP BOARDS

3 MAIN board

2 two connectors

(CN901, 902)

7 two screws
(BVTP 3 × 8)

5 three screws
(BVTP 3 × 8)

8 heat sink

6 POWER AMP boar

4 two screws

(BVTP 3 × 16)

LEAF SW/HEAD (A)/HEAD (B) BOARDS

3 five claws

plunger (PM1001)

6 HEAD (A) board

1 two screws

(BVTP 3 × 8)

1 Remove two solders of plunger (PM1001)

leads.

2 Remove four solders of

capstan/reel motor (M901) lead.

1 Remove two solders of

plunger (PM1002) leads.

4 LEAF SW board

plunger (PM1002)

10

5 ground point screw
(PTT 2 × 4)

8 HEAD (B) board

7 ground point screw

(PTT 2 × 4)

BASE UNIT (BU-K2BD37A)

5 base unit

(BU-K2BD37A)

4 two insulators

DRIVER/MOTOR/SENSOR/VIDEO BOARDS

0 screw
(PTPWH 2.6 × 8)

qa tray

3

9 MOTOR board

4 two insulators

1 wire (flat type) (23 core)

(CN101)

2 four screws
(PTPWH M2.6)

6 two screws
(BVTP 2.6 × 8)

4 wire (flat type) (8 core)

(CN721)

7

1 connector

(CN701)

2 screw
(BVTP 3 × 10)

qd SENSOR board

3 DRIVER board

qf two screws

(BVTP 2.6 × 8)

5 Remove two solders of turn motor (M721).

8 connector (CN722)

qs screw (BVTP 2.6 × 8)

qg VIDEO board

11

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. Press three buttons x , ENTER , and ?/1 simulta-neously.

2. The fluorescent indicator tube displays “COLD RESET” and

the set is reset.

[CD Ship Mode]

• This mode moves the pickup to the position durable to vibra­tion. Use this mode when returning the set to the customer after
repair.

Procedure:

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

2. Press CD button and ?/1 button simultaneously.

3. After the "STANDBY" display blinks six times, a message

“LOCK” is displayed on the fluorescent indicator tube, and the
CD ship mode is set.

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

2. The fluorescent indicator tube becomes blank instantaneously,

and the set is reset.

[CD Service Mode]

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

Procedure:

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

2. Select the function “CD”.

3. Press three buttons x , ENTER , and OPEN/CLOSE simul-

taneously.

4. The CD service mode is selected.

5. With the CD in stop status, turn the shuttle knob clockwise to

move the pickup to outside track, or turn the shuttle knob
counter-clockwise to inside track.

6. To exit from this mode, perform as follows:

1) Move the pickup to the most inside track.

2) Press three buttons in the same manner as step 2.

Note: • Always move the pickup to most inside track when exiting from

this mode. Otherwise, a disc will not be unloaded.

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

[Change-over of MW Tuner Step between 9 kHz and
10 kHz]

• A step of MW 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.

[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, VC version, CD version, CM
version, ST version, TC version, TA version, TM ver sion and
BR 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

“KEY0 VOL0”. 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.

[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.

12

[MC Test Mode]

• This mode is used to check operations of the respective sections
of Amplifier, Tuner, CD and Tape.

Procedure:

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

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

3. A message “TEST MODE” appears on the FL display tube.

4 When f (CURSOR UP) button is pressed, GEQ increases to

its maximum and a message “GEQ ALL MA” appears.

5. When F (CURSOR DOWN) b utton is pressed, GEQ decreases
to its minimum and a message “GEQ ALL M1” appears.

6. When g (CURSOR LEFT) or G (CURSOR RIGHT) b utton
is pressed, GEQ is set to flat and a message “GEQ FLAT”
appears.

7. 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.

8. 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.

9. In the test mode, the default-preset channel is called e ven when
the TUNER is selected and an attempt is made to call the preset
channel that has been stored in memory, by oper ating the Shuttle
knob. (It means that the memory is cleared.)

10. When CD is selected and the EDIT button is pressed, the disc
that is being chucked at this moment becomes the default
setting. It means that the default disc only is accessed when
any other discs are selected even though the display indication
changes accordingly. At the same time, the DISC SKIP EX­CHANGE and OPEN/CLOSE cannot be accepted. (It means
that the tray motor and the turntable motor are disabled of their
operation.)

11. When a tape is inserted in Deck B and recording is started, the
input source function selects VIDEO automatically.

12. When x button is pressed to stop recording, the T ape (Deck)
B is selected and tape is rewound using the Shuttle knob, tape
is rewound, 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, ta pe is rewound
to the position around the P AUSE position and is played back.

13. When the CD SYNC HI-DUB Button is press during playback
of Deck B, either normal speed or high speed can be selected
by this button.

14. Select the desired loop by pressing the PLAY MODE button.
Insert a test tape AMS-110A or AMS-RO to Deck A.

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

16. After a tape is rewound first, the FF AMS is checked, and the
mechanism is shut off after detecting the AMS signal twice.

17. Then the REW AMS is check ed and the mechanism is shut off
after detecting the AMS signal twice.

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

19. When you want to exit this mode, press the ?/1 button twice.
The cold reset is enforced at the same time.

13

[Aging Mode]

This mode can be used for operation check of CD section and tape deck section.

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

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

1. Operating method of Aging Mode

Turn on the main power and select “CD” of the function.

1) Set a disc in DISC1 tray. Select CONTINUE ALL DISCS (press the PLAY MODE button),

and REPEAT OFF (press the REPEAT button).

2) Load the tapes recording use into the decks A and B respectively.

3) Press three buttons x , ENTER , and

DISC SKIP/EX-CHANGE simultaneously.

4) Aging operations of CD and tape are started at the same time.

5) To exit the aging mode, perform [MC Cold Reset].

3. Aging Mode in CD section

1) Display state

• No error occurs

Display

AGING[*][*][*][*]

Note:

[*][*][*][*]

Error display

E ** s ## $$ %%

12 34 5

1 **

2 s
3 ##

4 $$

5 %%

: Number of aging operations

The error No. 00 indicates the newest error. As the error No. increases, it means the older error.
When you want to retrieve the error history, press the PLAY MODE button in the case of mechanism error.
Or press the REPEAT button in the case of NO DISC error.

M: Mechanism error
Don’t care

High order digits only
D: Stopped during closing due to problems other than mechanism.
E: Stopped during opening due to problems other than mechanism.
C: Stopped during chucking due to problems other than mechanism.
F: Stopped during EX-opening due to problems other than mechanism.

Emergency related errors (High order digits only)
1: Stopped during chuck-up
2: Stopped during chuck-down
3: Time out by EX-OPEN
5: Time out by EX-CLOSE

D: No disc error
01: FOCUS ERROR

02: GFS ERROR
03: SETUP ERROR

01: NO DISC judgment without chucking retry
02: NO DISC judgment after chucking retry

Status at the time of NO DISC judgment
(High order digits only)
1: STOP
2: SETUP
3: TOC READ
4: ACCESS
5: PLAY BACK
6: PAUSE
7: MANUAL SEARCH (PLAY)
8: MANUAL SEARCH (PAUSE)

• When the buttons x , ENTER and DISC 1 are pressed simultaneously, number of time of the mechanism error and the NO DISC
error can be checked.
Display: EMC**EDC** **: Number of times of error (Maximum three times)

EMC: Mechanism error
EDC: NO DISC error

• When aging operation is complete, be sure to perform the MC Cold Reset to reset the error history.

14

2) Operation during aging mode
In the aging mode, the program is executed in the following
sequence.
(1) The disc tray opens and closes.
(2) The mechanism accesses DISC 2 and makes an attempt to

read TOC. However, since there are no discs, a message
“CD2 NO DISC” appears.

(3) The mechanism accesses DISC 3 and a message “CD3 NO

DISC” appears.
(4) The disc tray turns to select a disc1.
(5) A disc is chucked.
(6) TOC of disc is read.
(7) The pickup accesses to the track 1, and playing 2 seconds.
(8) The pickup accesses to the last track, and playing 2 seconds.
(9) Every time when an aging operation of step 1 to step 8 is

complete, the display “ AGING[*][*][*][*]” v alue increases

as the number of aging operations is counted up.
(10) Returns to step 1.

3. Aging Mode in Tape Deck section

1) Display state

• No error occurs

Display action now

• Error occurred

Display action last time

NO. Display action Action contents Final timing

1 TAPE A AG-1 Rewind the TAPE A, B The top of tape
2 TAPE A AG-2 FWD play the TAPE A 2 minutes playing
3 T APE A AG-3 F .F . the TAPE A 20 second FF or the end

4 TAPE A AG-4 REV play the TAPE A 2 minutes playing
5 TAPE A AG-5 Rewind the TAPE A The top of tape
6 TAPE B AG-2 FWD play the TAPE B 2 minutes playing
7 T APE B AG-3 F.F. the TAPE B 20 second FF or the end

8 TAPE B AG-4 REV play the TAPE B 2 minutes playing
9 TAPE B AG-5 Rewind the TAPE B The top of tape

of tape

of tape

2) Operation during aging mode
In the aging mode, the program is executed in the following
sequence.
(1) Rewind is executed up to the top of tape A and B.
(2) A tape on FWD side is played for 2 minutes.
(3) FF is executed up to either made for 20 second or the end of

tape.

(4) A tape is reversed, and the tape on REV side is played for 2

minutes.
(5) Rewind is executed up to the top of tape.
(6) Returns to step 2, and repeat steps from 2 to 5.

[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”.

15

VIDEO CD COLOR-BARS MODE

On this mode, the data of the color-bars signal as a picture signal and the 1kHz sine wave signal as a sound signal are output by the CD
mechanism control microcomputer (IC502) for 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 J302 (VIDEO OUT) and the sound signal can be observed at J101 (VIDEO/MD
(AUDIO) OUT) using an oscilloscope.

1. Connect the lead wire to both ends of the land of SL503 of the VIDEO board.

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

3. After 2 or 3 seconds later, connect the lead wire.

4. After measuring, remove the lead wire connected.

[VIDEO BOARD] (SIDE A)

SL501 SL502

TEST MODE

[VIDEO BOARD] (SIDE B)

SL503

CT503

VIDEO
FREQUENCY

IC505

IC507

16

TEST

MODE

SL503
SL502
SL501

IC502

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

FWD

FWD
back tension

REV

REV
back tension

FF/REW

FWD tension

REV tension

Torque meter

CQ-102C

CQ-102C

CQ-102RC

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-L300 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)

MAIN board
CN301
Pin 3 (L-CH)
Pin 1 (R-CH)

set

MAIN board
CN301
Pin 2 (GND)

level meter

+
–

17

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

(

)

r

(

)

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

Tape Speed Adjustment DECK B

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

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)

frequency counte

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 °

pin 3

pin 2

L

R

pin 1

good

oscilloscope

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).

set

MAIN board
CN301 (Pin 3 : L-CH)

Pin 1 : R-CH

+

–

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 do 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-L300
(315 Hz, 0 dB)

set

level meter

+

–

18

forward

reverse

MAIN board
CN301 (Pin 3 : L-CH)

Pin 1 : R-CH

Deck A is RV302 (L-CH) and RV352 (R-CH), Dec k B is RV303
(L-CH) and RV353 (R-CH) so that adjustment within adjustment
level as follows.

Adjustment Level:

CN301 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: MAIN board

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

(WS-48B)

REC Bias Adjustment DECK B

e

(

)

r

set

MD/VIDEO (AUDIO) IN
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

TAPE SPEED

(HIGH)

RV1002

RV1001

TAPE SPEED

(NORMAL)

Procedure:

INTRODUCTION
When set to the test mode performed in Tape Speed Adjustment,
when the tape is rewound after recording, the “REC memory mode”
which rewinds only the recorded portion and playback is set.
This “REC memory mode” is convenient for performing this
adjustment. During recording, the input signal FUNCTION will
automatically switch to VIDEO.
(If do not operation of stopped from recording complete, and rotate
of shuttle knob then rewind to 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/START button, press REC PAUSE/
START button, then recording start.

4. Mode: Record

4. Mode: Record

5. Mode: Playback

MD/VIDEO (AUDIO) IN

1) 315 Hz

2) 10 kHz

AF OSC

attenuator



50 mV (–23.8 dB)




600 Ω

set

blank tap
CN-123

5. Mode: Playback

recorded
portion

set

CN301 (Pin 3 : L-CH)

level mete

+

–

Pin 1 : R-CH

6. Confirm playback the signal recorded in step 3 become
adjustable level as follows.
If these levels do not adjustable level, adjustment the RV304
(L-CH) and R V354 (R-CH) on the A UDIO 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:

INTRODUCTION
When set to the test mode performed in Tape Speed Adjustment,
when the tape is rewound after recording, the “REC memory mode”
which rewinds only the recorded portion and playback is set.
This “REC memory mode” is convenient for performing this
adjustment. During recording, the input signal FUNCTION will
automatically switch to VIDEO.
(If do not operation of stopped from recording complete, and rotate
of shuttle knob then rewind to recording start position.)

6. Confirm playback the signal recorded in step 3 become
adjustable level as follows.
If these levels do not adjustable level, adjustment the RV301
(L-CH) and R V351 (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)

PB LEVEL (R)

(A)

PB LEVEL (R)

(B)

[LEAF SW BOARD]

(Conductor Side)

REC LEVEL (R)

REC BIAS (L)

REC LEVEL (L)

CN301

RV351

13

RV303

PB LEVEL (L)

(B)

REC BIAS (R)

RV352

RV302

RV353

PB LEVEL (L)

(A)

RV301

RV304

RV354

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/START button, press REC PAUSE/
START button, then recording start.

19

FM Tuned Level Adjustment

FM RF SSG

75 Ω coaxial

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

set

FM ANTENNA terminal
(TM601)

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

Procedure:

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

2. Tune the set to 98 MHz.

3. Adjust RV611 to the point (moment) when the TUNED
indicator on the fluorescent indication tube will change from
going off to going on.

Adjustment Location: MAIN board

Null Adjustment

FM RF SSG

75 Ω coaxial

set

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

FM ANTENNA terminal
(TM601)

Procedure:

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

2. Tune the set to 98 MHz.

3. Measure v oltage between pin wa of IC 601. Adjust T601 until
the voltage becomes 0 V.

Adjustment Location: MAIN board

[MAIN BOARD] (Component Side)

oscilloscope

BD board

TP(FEO)
TP(VC)

Procedure :

1. Connect oscilloscope to TP (FEO).

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

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

4. Turn Power switch on.

5. Load a disc (YEDS-18) and actuate the focus search. (In
consequence of open and close the disc tray, actuate the focus
search)

6. Confirm that the oscilloscope waveform (S-curve) is
symmetrical between A and B. And confirm peak to peak level
within 4 ±1 Vp-p.

S-curve waveform

symmetry

A

within 4 ±1Vp-p

B

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.

20

NULL

T601

RV611

FM TUNED LEVEL

CN301

RV351

RF Level Check

oscilloscope

BD board

TP(RF)
TP(VC)

CN304

13

RV301

RV303

RV302

RV352

RV353

CN302

CN303

RV304

RV354

Procedure :

1. Connect oscilloscope to TP (RF).

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

3. Turned Power switch on.

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

5. Confirm that 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

r

clearly distinguished at the center of the waveform.

RF signal waveform

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

level : 1.45 ± 0.3Vp-p

E-F Balance (1 Track Jump) Check

oscilloscope

BD board

TP (TEO)
TP (VC)

+
–

Procedure:

1. Connect oscilloscope to TP (TEO) and TP (VC) board.

2. Turned Power switch on.

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

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

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

1 track jump waveform

Center of
waveform

B

0V

level=1.3±0.6Vp-p

Specification level: x 100=less than ±22%

A
B

Symmetry

A (DC voltage)

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

RF PLL Free-Run Frequency Check

Procedure :

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

BD board

TP (XPCK)

frequency counte

+

–

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.

21

r

Adjustment Location :

[BD BOARD] (SIDE B)

TP

(RF)

TP

(VC)

TP (AGCCON)

IC103

TP

(GND)

TP (FEO)

TP (TEO)

TP (FEI)

TP (XPCK)

IC101

VIDEO SECTION

VIDEO Frequency Adjustment

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

2. Adjust CT503 of the VIDEO board so that the frequency counter
read 27MHz ± 80Hz at STOP condition.

Adjustment Location :

[VIDEO BOARD] – SIDE A –

SL502

SL501

TEST MODE

SL503

CT503
VIDEO

FREQUENCY

TP

(27MHz)

TP

(GND)

IC505

IC507

VIDEO board
TP (27 MHz)

[VIDEO BOARD] – SIDE B –

SL503

TEST

MODE

SL502
SL501

IC502

frequency counte

+

–

22

SECTION 7

DIAGRAMS

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

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.

• % : indicates tolerance.

f

•

• 2 : nonflammable resistor.

• 5 : fusible resistor.

• C : panel designation.

Note: The components identified by mark 0 or dotted line

• U : B+ Line.

• V : B– Line.

• H : adjustment for repair.

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

• Waveforms are taken with a oscilloscope.

• Circled numbers refer to waveforms.

• Signal path.

• Abbreviation

: internal component.

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

Voltage variations may be noted due to normal produc­tion tolerances.

Voltage variations may be noted due to normal produc­tion tolerances.

F : FM
f : AM
E : PB (DECK A)
d : PB (DECK B)
G : REC (DECK B)
J : CD (AUDIO)
c : digital out
o : CD (VIDEO)
m : VIDEO (C)
n : VIDEO (Y)

EA : Saudi Arabia model

4

W or less unless otherwise

Note on Printed Wiring Boards:

• X : parts extracted from the component side.

• Y : parts extracted from the conductor side.

• b : Pattern from the side which enables seeing.
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

B

E

B

These are omitted.

Q

CE

These are omitted.

7-1. CIRCUIT BOARDS LOCATION

SENSOR board

TRANS board

CD SWITCH board

PANEL board

LEAF SW board

HEAD (A) board

HEAD (B) board

MOTOR board

HCD-VX88

DRIVER board

VIDEO board

BD board

MAIN board

POWER AMP board

2323

HCD-VX88

Waveforms
– CD SECTION – – VIDEO SECTION –

1

1

IC101 t;

RFAC

IC502 qd

XOUT

7

IC509 ql

LRCK

– MAIN BOARD –

1

IC401 qa

STOP MODE

3

T301 4

TAPE B REC MODE

– PANEL BOARD –

1

IC601 oa

STOP MODE

2

IC101 ra

TE

APPROX 500mVp-p

3

IC101 el

FE

APPROX 200mVp-p

4

IC101 wg

MDP

7.5µsec

1.3Vp-p

2.6Vp-p

2.5V

2.5V

2

IC505 ug

COUT

3

IC505 yl

YOUT

4

IC304 9

COUT

10MHz

H

H

4Vp-p

44.1kHz

8

IC509 qj

BCK

1Vp-p

2.11MHz

9

IC504 8

384FS

2Vp-p

H

q;

27M

1Vp-p

33.8MHz

IC504 6

27MHz

4.6Vp-p

4.8Vp-p

4.8Vp-p

3.8Vp-p

32.768kHz

2

IC401 qd

STOP MODE

16MHz

3.0Vp-p

3.4Vp-p

80.7kHz

120Vp-p

12.5MHz

4.8Vp-p

5

IC304 qg

YOUT

6

IC509 1

XT1

2Vp-p

H

5.8Vp-p

27MHz

24

24

7-2. BLOCK DIA GRAMS

– TUNER/CD SECTION –

HCD-VX88

FM 75Ω

AM

TM601

ANTENNA

FE602

FM FRONT-END

8

ANT IN

RB641

AM FRONT-END

1

3

IF OUT

F OUT

13

1

FM IF

5

FM DET

9

IF OUT

12

AM/FM

24

AM OSC OUT

13

VCO STOP

8

IF REQ MUTE

20

AM RF IN

22

AM OSC

23

V REG

AM/FM IF MPX

IC601

AM MIX OUT

FM SD ADJ

TUNED

STEREO

L OUT

R OUT

11

10

18AM IF IN

19

3

6
7

BUFFER

Q611

R-CH

IFT601

RV611

FM TUNED

LEVEL

B+ SWITCH

X651

Q602

Q601

IF

AMP

10

1

24

15
18
17
19

FM

XIN

XOUT

FM OSC
VT1 IN
VT1
PD1

PLL

IC651

FM/AM IF

AM OSC

T601

NULL

12

FM

7

14

2VCO STOP
8IF REQ

DO

6DO

DI

4DI
CL
CE

CL

5

CE

3

1
3

VT

4

14

4

55

122

1511

67

9

CF601 CF602

+B A+12V

4.5MHz

LPF601

LPF

L-CH

(Page 27)

DO

DI
CL
CE

A

MAIN

SECTION

SYSTEM CONTROLLER

IC401(1/2)

24

TUNED

23

STEREO

22

ST MUTE

27

ST DIN

26

ST DOUT

28

ST CLK

25

ST CE

• R-CH: Same as L-CH.

• Signal Path
: FM

: AM

: CD (AUDIO)

: DIGITAL OUT

: CD (VIDEO)

OPTICAL PICK-UP

BLOCK

(KSS-213D/ZN)

VC

A
B
C
D
E

F

LD

GND

PD

VR

F+

FOCUS

COIL

F-

COIL

T+

T-

TRACKING

05

+5V

AUTOMATIC

POWER

CONTROL

M102

(SLED)

M101

(SPINDLE)

Q101

DIGITAL SERVO,

RF AMP

IC103

12

VC

5

A

6

B

7

C

8

D

11

E

10

F

3

LD

4

PD

IC102

MOTOR/COIL DRIVE

14

13

12

11

16

VO1 (+)

VO1 (–)

VO2 (+)

VO2 (–)

VO4 (–)

OPIN1 (+)

OPIN1 (–)

OPIN2 (+)

OPIN2 (–)

OPIN4 (–)

RFO

RFI

16
17

FE

14

TE

13

22LD ON

21HOLD SW

2

3

5

6

26

A+5V

M

15

18

VO4 (+)

VO3 (–)

OPIN4 (+)

OPIN3 (–)

27

23

DIGITAL SIGNAL PROCESSOR,

S101

(LIMIT)

D/A CONVERTER

26

SSTP

50

RFAC

43

RFDC

39

FE

41

TE

40

SE

33

FFDR

34

FRDR

31

TFDR

32

TRDR

30

SRDR

29

SFDR

25

MDP

IC101

D OUT

PCMD

B CLK

L RCK

C2PO
DATA
XLAT
CLOK

SENS
S CLK
MUTE

XTSL
SCOR
SQSO
SQCK

XRST

XTAI

IC201

OPTICAL

64

66
67
65
14

4
5
6
7
8

3
69
15
76
77

2
71

IC104

DIGITAL

A DATA
B CLK
L RCK
C2PO
DATA
XLT
CLK
SENS
S CLK
MUTE
CTRL1
SCOR
SUBQ
SQCK
XRST
MCK

OUT

OPTICAL

B

VIDEO

SECTION

(Page 26)

C

VIDEO

SECTION

2

C-DATA

I

2

I

C-CLK

XRST

BU UP/DOWN SW

30

IIC-DATA

29

IIC-CLK

43

XRST

MTR CNT2

T SENS

IC701

44

45MTR CNT1

49

46OPEN SW
47CLOSE SW

48

9

MOTOR

DRIVE

7

TABLE ADDRESS

4

M

2

IC711

SENSOR

S701

(OPEN/CLOSE)

OPEN

CLOSE

S711

(BU UP/DOWN)

M721

(TURN)

(Page 26)

M

17

VO3 (+)

STBY1
STBY2

9

20

LD ON
LPH

2525

HCD-VX88

– VIDEO SECTION –

B

CD

SECTION

(Page 25)

05

ADATA

BCLK
LRCK

C2PO

DATA

XLT
CLK

SENS
SCLK

MUTE

CTRL1

LPH
LDON
SCOR

SUBQ
SQCK

XRST

MCK

(XTAL 33.8MHz)

1

13

5

LEVEL SHIFT

IC501

DATAI
DATAO

CLK1
HRDY
INT
HSEL
RST

DATAO

DATAI
CLK1

INT
HSEL
HRDY
RESET

INVERTER

Q502

INVERTER

Q501

D-RAM

IC507

RAS

UCAS

LCAS

A0

13 14 28 29

38 42 40

MWE WE

4

10

8

4

CD-DATA

3

CD-BCK
CD-LRCK

5

6

CD-C2PO

112

HD-OUT

119

HD-IN

117

HCK
HRDY

113
114

HINT

121

HSEL

60

RESET
PGIO2/VSYNC/CSYNC

93

PGIO3/HSYNC

101

31

DATA1O

32

DATA1I

33

CLK1
CL680 INTR

20
21

CL680 HSEL

23

CL680 HRDY

24

680 RESET

25

HSYNC IN

45

VSYNC
DSP DATA

95
97

DSP LATCH

5

DSP CLK

1

SENSE
SENSE CLK

2

DSP MUTE

10
11

CTRL1(L:DOUBLE)

27

LPH

28

LDON

18

SCOR

36

SUBQ DATA
SUBQ CLK

37

DEVICE RESET

77

16 - 19 22 - 26

CAS

RASO

CD MECHANISM CONTROLLER

A8

IC502

DQ1

2 - 10 31 - 39

CHROMA LEVEL

DQ16

MPEG VIDEO/AUDIO DECODER,

VIDEO SIGNAL PROCESSOR

RESOLUTION

V. MUTE

DF LATCH

XIN

XOUT

2

C-DATA

I

I2C-CLK

XRESET

TEST1
TEST2
TEST3

TEST LED

RTS1

BUS XHOLD

BUS XWRL

BGP

O0

13 - 15 17 - 21

IC505

3

4
20
65
22

15

13

30
29
12

74
75
76

73

TP522

34
41
46

X501

10MHz

TP523

O7

10 - 29

MD0

SL503
SL502
SL501

ROM

IC506

A11

25 4 28 29 3 2 30 12 - 5 27 26 23

I

MD15

5V

(SELF-DIAGNOSIS)

A17

A0

SL501-503

(TEST MODE)

58 - 44

I

MA0

Y-OUT

C-OUT

DA-DATA
DA-LRCK

DA-BCK

VCK-IN

DA-XCLK

MA10

A10

CE

22

37

MCE

69

75

110
108

111
106

86

DATAI

CLK1

DATAO

CN503

1
2
5
8

3
11
10

10

VIDEO
IN

5

CONTROL

Y AMP/PICTURE CORRECTION

1

V IN

8

TINT

5

IC301

27MHz

TXD
S CLK
RXD
RST
BUSY
HOLD
XWR

BGD

DATAO
CLK1

FOR
FLASH
ROM
WRITE

IC303

HUE CONTROL

VIDEO

IC302

V OUT

18
19
17

9
8
7

1

OUT

6

DIGITAL FILTER & D/A CONVERTER

IC509

D/A

CONV

MODE

10 21 20 4

RSTB

DIVIDER

PLM

CLOCK

11

+3.3V REG

2

7

1
8

3

1

Q531

Y IN

C IN

MUTEA
MUTEB

14
11

1

24

IC304
Y/C AMP,
MIX AMP

MIX OUT1

Y OUT1

C OUT1

R-CH

X503

27MHz

FREQUENCY

LEVEL SHIFT

IC504

12

15

9

LOW-PASS FILTER

IC101

CT503

VIDEO

27MHz

6

384FS

8

+3.3VD5V

J302

VIDEO OUT

4

132

13

CD-L

(Page 27)

2

C-DATA

I

2

I

C-CLK

XRST

• R-CH: Same as L -CH.

• SIGNAL PATH
: CD (AUDIO)

S VIDEO
OUT

D

MAIN

SECTION

C

J301

TUNER/CD

SECTION

(Page 25)

: VIDEO (C)
: VIDEO (Y)
: CD (VIDEO)

26

26