1
E Model
SPECIFICATIONS
SERVICE MANUAL
COMPACT DISC DECK RECEIVER
-- Continued on next page --
MICROFILM
HCD-V818
HCD-V818 is the tuner, deck, Video CD
and amplifier section in MHC-V818.
Model Name Using Similar Mechanism
HCD-V800
CD Mechanism Type
CDM38L-5BD24AL
Base Unit Type
BU-5BD24AL
Optical Pick-up Type
KSS-213D/Q-NP
Model Name Using Similar Mechanism
HCD-GRX8/R800/RX88/RX99
Tape Transport Mechanism Type
TCM-230AWR1
TCM-230PWR1
CD
SECTION
TAPE
DECK
SECTION
2
SELF DIAGNOSIS
This unit is equipped with a self-diagnosis function.
The function is used for diagnosing the conditions of the circuits of the VIDEO board.
The circuits can be determined if normal or abnormal by the lighting of D502 of the VIDEO board.
Lighting of D502
When lit
: Operates normally
Blinks repeatedly : The circuit may be faulty.
[VIDEO BOARD] (SIDE A)
SL501
D502
SL502
IC507
IC505
CT503
SL503
TEST MODE
VIDEO
FREQUENCY
3
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 temperatur e of soldering ir on 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.
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.
The following
caution label is
located inside of
the unit.
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.
PARTS No.
4-999-907-0
4-999-907-1
4-999-907-3
4-999-907-4
4-999-907-5
MODEL
SP, MY
EA
HK
TW
IA
MODEL IDENTIFICATION
-- BACK PANEL --
· Abbreviation
EA
: Saudi arabia model
HK
: Hong Kong model
SP
: Singapore model
MY
: Malaysia model
TW
: Taiwan model
IA
: Indonesian model.
Parts No.
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 two times.
4
1. SERVICING NOTE .......................................................... 5
2. GENERAL .......................................................................... 6
3. DISASSEMBLY
3-1. Loading Panel ....................................................................... 9
3-2. Front Panel ........................................................................... 9
3-3. Cassette Mechanism Deck .................................................. 10
3-4. Panel Board and Cont Com Board ...................................... 10
3-5. Disc Tray ........................................................................... 11
4. TEST MODE .................................................................... 12
5. SERVICE MODE ............................................................ 14
6. MECHANICAL ADJUSTMENTS .......................... 16
7. ELECTRICAL ADJUSTMENTS ............................... 16
8. DIAGRAMS
8-1. Circuit Boards Location ...................................................... 22
8-2. Block Diagrams
· CD Section ....................................................................... 23
· Video Section ................................................................... 25
· Deck Section .................................................................... 27
· Main Section .................................................................... 29
· Power Section .................................................................. 31
· Display Section ................................................................ 33
·
Section ............................................................... 35
8-3. Printed Wiring Board CD Section ................................. 37
8-4. Schematic Diagram CD Section ................................... 39
8-5. Schematic Diagram Deck Section ................................ 41
8-6. Printed Wiring Board Deck Section .............................. 43
8-7. Printed Wiring Board Video Section ............................. 45
8-8. Schematic Diagram Videon (1/3) Section ..................... 47
8-9. Schematic Diagram Videon (2/3) Section ..................... 49
8-10. Schematic Diagram Videon (3/3) Section .................. 51
8-11. Printed Wiring Board Main Section ........................... 53
8-12. Schematic Diagram Main (1/4) Section ..................... 55
8-13. Schematic Diagram Main (2/4) Section ..................... 57
8-14. Schematic Diagram Main (3/4) Section ..................... 59
8-15. Schematic Diagram Main (4/4) Section ..................... 61
8-16. Printed Wiring Board Mic/HP Section ....................... 63
8-17. Schematic Diagram Mic/HP Section .......................... 64
8-18. Printed Wiring Board Power Amp Section ................. 65
8-19. Schematic Diagram Power Amp Section ................... 67
8-20. Schematic Diagram Transformer Section ................... 69
8-21. Printed Wiring Board Transformer Section ................ 71
8-22. Printed Wiring Board Leaf SW Section ..................... 72
8-23. Schematic Diagram Leaf SW Section ........................ 72
8-24. Printed Wiring Board Display Section ....................... 73
8-25. Schematic Diagram Display Section .......................... 75
8-26. Schematic Diagram Panel Section ............................. 77
8-27. Printed Wiring Board Panel Section ........................... 79
8-28. Schematic Diagram CD Motor Section ...................... 81
8-29. Printed Wiring Board CD Motor Section ................... 83
8-30. IC Block Diagrams ........................................................... 85
8-31. IC Pin Functions ............................................................... 87
TABLE OF CONTENTS
9. EXPLODED VIEWS
9-1. Case Section ........................................................................ 99
9-2. Chassis Section ................................................................. 100
9-3. Front Panel Section ........................................................... 101
9-4. CD Mechanism Deck Section-1 (CDM38L-5BD24AL) .. 102
9-5. CD Mechanism Deck Section-2 (CDM38L-5BD24AL) .. 103
9-6. Base Unit Section (BU-5BD24AL) .................................. 104
9-7. TC Mechanism Section 1
(TCM230AWR1, TCM230PWR1) ................................... 105
9-8. TC Mechanism Section 2
(TCM230AWR1, TCM230PWR1) ................................... 106
10. ELECTRICAL PARTS LIST .................................. 107
5
SECTION 1
SERVICING NOTE
HOW TO OPEN THE DISC TRAY WHEN POWER SWITCH
TURNS OFF
Note for Installation (ROTARY ENCODER)
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.
3 pull-out the disc tray.
1 Remove the case.
2 Turn the cam to the
direction of arrow.