1
HCD-VX8/VX8J
E Model
SPECIFICATIONS
Photo: HCD-VX8 (SILVER)
COMPACT DISC DECK RECEIVER
-- Continued on next page --
Model Name Using Similar Mechanism HCD-GRX80/RXD8/RXD8S
CD Mechanism Type
CDM38L-5BD34L
Base Unit Type
BU-5BD34L
Optical Pick-up Type
KSS-213D/Q-NP
Model Name Using Similar Mechanism HCD-GRX80/RXD8/RXD8S
Tape Transport Mechanism Type
TCM-230AWR2/230PWR2
CD
SECTION
TAPE DECK
SECTION
MICROFILM
SERVICE MANUAL
HCD-VX8/VX8J is the tuner, deck, CD and
amplifier section in MHC-VX8/VX8J.
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 pick-
up block. Therefore, when checking the laser diode emission, ob-
serve 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 waveform is output four times.
4-215-641-0
VX8: EA
MALAYSIA
4-215-641-1
VX8: MY, SP
MALAYSIA
4-215-641-2
VX8: TW
MALAYSIA
4-215-641-3
VX8: E
MALAYSIA
4-215-641-4
VX8: IA
INDONESIA
4-215-641-5
VX8: HK
MALAYSIA
4-215-641-6
VX8J: E
JAPAN
4-215-641-7
VX8J: EA
JAPAN
4-215-641-8
VX8: TH
THAI
MODEL IDENTIFICATION
-- BACK PANEL --
· Abbreviation
EA
: Saudi Arabia model
TW
: Taiwan model
IA
: Indonesia model
HK
: Hong Kong model
TH
: Thai model
MY
: Malaysia model
SP
: Singapore model
CAUTION
Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous ra-
diation 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
! OR DOTTED LINE
WITH MARK
! 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.
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 PROD-
UCT MARKING is located on
the rear exterior.
Parts No.
PARTS No.
MODEL
PRODUCT
COUNTRY
3
TABLE OF CONTENTS
1. SERVICING NOTE .......................................................... 4
2. GENERAL .......................................................................... 5
3. DISASSEMBLY
3-1. Loading Panel ....................................................................... 7
3-2. Front Panel and Video Board ................................................ 7
3-3. Cassette Lid and Tape Mechanism ........................................ 8
3-4. CD SW Board and Panel Board ............................................ 8
3-5. Disc Tray ............................................................................... 9
4. SERVICE MODE ............................................................ 10
5. TEST MODE ..................................................................... 12
6. MECHANICAL ADJUSTMENTS .......................... 13
7. ELECTRICAL ADJUSTMENTS ............................... 13
8. DIAGRAMS
8-1. Circuit Boards Location ...................................................... 18
8-2. Block Diagrams
· CD Section ....................................................................... 19
· Video Section ................................................................... 21
· Deck Section .................................................................... 23
· Main Section .................................................................... 25
· Power Section .................................................................. 27
· Display Section ................................................................ 29
8-3. Printed Wiring Board CD Section ................................. 33
8-4. Schematic Diagram CD Section ................................... 35
8-5. Schematic Diagram Deck Section ................................. 37
8-6. Printed Wiring Board Deck Section .............................. 39
8-7. Printed Wiring Board Video Section ............................. 41
8-8. Schematic Diagram Video (1/3) Section ....................... 43
8-9. Schematic Diagram Video (2/3) Section ....................... 45
8-10. Schematic Diagram Video (3/3) Section .................... 47
8-11. Printed Wiring Board Main Section ........................... 49
8-12. Schematic Diagram Main (1/4) Section ..................... 51
8-13. Schematic Diagram Main (2/4) Section ..................... 53
8-14. Schematic Diagram Main (3/4) Section ..................... 55
8-15. Schematic Diagram Main (4/4) Section ..................... 57
8-16. Printed Wiring Board Leaf SW Section ..................... 59
8-17. Schematic Diagram Leaf SW Section ........................ 59
8-18. Printed Wiring Board Panel Section ........................... 61
8-19. Schematic Diagram Panel (1/3) Section ..................... 63
8-20. Schematic Diagram Panel (2/3) Section ..................... 65
8-21. Schematic Diagram Panel (3/3) Section ..................... 67
8-22. Schematic Diagram CD Motor Section ...................... 69
8-23. Printed Wiring Board CD Motor Section ................... 71
8-24. Schematic Diagram Trans Section ............................. 73
8-25. Printed Wiring Board Trans Section ........................... 75
8-26. Schematic Diagram Surround Section ....................... 76
8-27. Printed Wiring Board Surround Section ..................... 76
8-28. IC Block Diagrams ........................................................... 77
8-29. IC Pin Functions ............................................................... 80
9. EXPLODED VIEWS
9-1. Case Section ........................................................................ 90
9-2. Chassis Section ................................................................... 91
9-3. Front Panel Section ............................................................. 92
9-4. CD Mechanism Deck Section-1 (CDM38L-5BD34L) ....... 93
9-5. CD Mechanism Deck Section-2 (CDM38L-5BD34L) ....... 94
9-6. Base Unit Section (BU-5BD34L) ....................................... 95
9-7. TC Mechanism Section-1 (TCM230AWR2/230PWR2) .... 96
9-8. TC Mechanism Section-2 (TCM230AWR2/230PWR2) .... 97
10. ELECTRICAL PARTS LIST ............................. 98
4
CD-TEXT
This unit is provided with a simple CD-TEXT display function.
The CD-TEXT contents of 20 tracks are displayed on the fluorescent display tube.
Since the function is simple, some special characters may not be displayed, or may be displayed as other characters.
SECTION 1
SERVICING NOTE
HOW TO OPEN THE DISC TRAY WHEN POWER SWITCH
TURNS OFF
NOTE FOR INSTALLATION (ROTARY ENCODER)
3 Pull-out the disc tray.
1 Remove the Case.
2 Turn the cam to the direction
of arrow.
BU cam
Groove
Section A
Note:When attaching the Base unit, Insert the
section A into the groove of BU cam.
Note:When attaching the BU cam,
engage the Rotary encoder
switch as shown in the figure.
5
LOCATION OF PARTS AND CONTROLS
1
1/u (Power) button and indicator
2
DEMO (STANDBY) button
3
DISC 1 button and indicator
4
DISC 2 button and indicator
5
DISC 3 button and indicator
6
DISC SKIP/EXCHANGE button
7
§ (Eject) button
8
Disc tray
9
EDIT DIRECTION/TUNER MEMORY
button
10 PLAY MODE/DOLBY NR button
11 REPEAT/STEREO/MONO button
12
p button
13
^ (CD) button and indicator
14 TUNER/BAND button
15 CD NON-STOP button and indicator
16 KARAOKE PON/MPX button
17 SYNC EQ button
18 SYNC BASS button
19 REC PAUSE/START button and
indicator
20 DBFB button
21 SURROUND button
22 HI DUB button
23 CD SYNC button
24 VOLUME knob
25 PHONES jack
26 ENTER/NEXT button
27
) + button and indicator
28 JOG/
0x) dial and indicator
29 GROOVE button and indicator
30
0 button and indicator
31 AUTO BPM button and indicator
32 PAD B button and indicator
33 PAD A button and indicator
34 MIC 2 jack
35 MIC 1 jack
36 CD FLASH button
37 CD LOOP button
38 MIC LEVEL knob
39 JAM button and indicator
40 LEVEL button
41 MIX button
42 ECHO LEVEL knob
43 BEAT SPEED button
44 BEAT SELECT button
45 BEAT ON/OFF button and indicator
46 P FILE MEMORY button
47 GEQ CONTROL button
48 FILE SELECT
49 EFFECT button
50 NEXT button
51 PREV button
52 RETURN button
53 SELECT button
54
( (TAPE B) button and indicator
55
9 (TAPE B) button and indicator
56
( (TAPE A) button and indicator
57
9 (TAPE A) button and indicator
58 FUNCTION button
59 Remote sensor
60 DISPLAY button
61 SPECTRUM ANALYZER button
62 CLOCK/TIME SET button
63 TIMER SELECT button and indicator
64 Display Window
SECTION 2
GENERAL
Front Panel
18
9
10
11
8
23
4
7
56
1
12 13 14
16 17
15
19
20 21
22
38
48
49
50
51
52
41
42
43
44
45
46
47
40 39
37
53
55
56
58
60
61
54
57
59
62
31
30 29
23
24
25
32
33
34
26
27
28
35
36
63
64