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1
MICROFILM
SPECIFICATIONS
COMPACT DISC DECK RECEIVER
-- Continued on next page --
HCD-V8900/V8900AV is the tuner, deck, CD and
amplifier section in LBT-V8900AV/V8900S.
HCD-V8900/V8900AV
E Model
HCD-V8900/V8900AV
Chinese Model
HCD-V8900AV
Model Name Using Similar Mechanism
HCD-V4500
CD Mechanism Type
CDM37L-5BD21AL
Base Unit Type
BU-5BD21AL
Optical Pick-up Type
KSS-213D/Q-NP
Model Name Using Similar Mechanism
HCD-V4500
Tape Transport Mechanism Type
TCM-220WR2
CD
SECTION
TAPE
DECK
SECTION
Photo : HCD-V8900AV
SERVICE MANUAL
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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 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.
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.
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.
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TABLE OF CONTENTS
7-12. Printed Wiring Board Main Section ........................... 47
7-13. Schematic Diagram Main (1/5) Section ..................... 49
7-14. Schematic Diagram Main (2/5) Section ..................... 51
7-15. Schematic Diagram Main (3/5) Section ..................... 53
7-16. Schematic Diagram Main (4/5) Section ..................... 55
7-17. Schematic Diagram Main (5/5) Section ..................... 57
7-18. Printed Wiring Board Deck Section ........................... 59
7-19. Schematic Diagram Deck Section .............................. 61
7-20. Printed Wiring Board Power Section ......................... 63
7-21. Schematic Diagram Power Section ............................ 65
7-22. Schematic Diagram Panel Section ............................. 67
7-23. Printed Wiring Board Panel Section ........................... 69
7-24. Printed Wiring Board TC/CD Panel-1 Section ........... 71
7-25. Schematic Diagram TC/CD Panel-1 Section ............. 73
7-26. Schematic Diagram HP/Mic Section .......................... 75
7-27. Printed Wiring Board HP/Mic Section ....................... 77
7-28. Printed Wiring Board CD Motor Section ................... 79
7-29. Schematic Diagram CD Motor Section ...................... 81
7-30. Printed Wiring Board Trans Section ........................... 83
7-31. Schematic Diagram Trans Section ............................. 85
7-32. Printed Wiring Board Surround Section ..................... 87
7-33. Schematic Diagram Surround Section ....................... 88
7-34. IC Block Diagrams ........................................................... 89
7-35. IC Pin Functions ............................................................... 96
8. EXPLODED VIEWS
8-1. Case and Back Panel Section ............................................ 113
8-2. Front Panel Section-1 ........................................................ 114
8-3. Front Panel Section-2 ........................................................ 115
8-4. Chassis Section ................................................................. 116
8-5. TC Mechanism Section-1 (TCM-220WR2) ..................... 117
8-6. TC Mechanism Section-2 (TCM-220WR2) ..................... 118
8-7. TC Mechanism Section-3 (TCM-220WR2) ..................... 119
8-8. CD Mechanism Section (CDM37L-5BD21L) .................. 120
8-9. Base Unit Section (BU-5BD21AL) .................................. 121
9. ELECTRICAL PARTS LIST ...................................... 122
1. GENERAL .......................................................................... 4
2. DISASSEMBLY
2-1. Front Panel ........................................................................... 5
2-2. Main Board ........................................................................... 6
2-3. Tape Mechanism Deck .......................................................... 6
2-4. Cassette Lid Assembly .......................................................... 7
2-5. CD Lid Assembly .................................................................. 7
2-6. CD Mechanism Deck ............................................................ 8
2-7. Base Unit .............................................................................. 8
2-8. Disc Table ............................................................................. 8
3. SERVICE MODE .............................................................. 9
4. TEST MODE ..................................................................... 11
5. MECHANICAL ADJUSTMENTS .......................... 12
6. ELECTRICAL ADJUSTMENTS ............................... 12
7. DIAGRAMS
7-1. Circuit Boards Location ...................................................... 17
7-2. Block Diagrams
· KEY CON Section ........................................................... 18
· CD Section ....................................................................... 19
· Video Section ................................................................... 21
· Deck Section .................................................................... 23
· Main Section .................................................................... 25
· Power Section .................................................................. 27
7-3. Printed Wiring Board CD Section ................................. 31
7-4. Schematic Diagram CD Section ................................... 33
7-5. Printed Wiring Board Video Section ............................. 35
7-6. Schematic Diagram Video (1/4) Section ....................... 37
7-7. Schematic Diagram Video (2/4) Section ....................... 39
7-8. Schematic Diagram Video (3/4) Section ....................... 41
7-9. Schematic Diagram Video (4/4) Section ....................... 43
7-10. Printed Wiring Board Key Control Section ................ 45
7-11. Schematic Diagram Key Control Section ................... 46
MODEL IDENTIFICATION
-- BACK PANEL --
V8900AV: SP, MY
V8900AV: CH
V8900AV: IA
V8900
MODEL
PARTS No.
4-900-073-0
4-900-073-1
4-900-073-2
4-900-073-3
· Abbreviation
SP : Singapore model
MY : Malaysia model
IA : Indonesian model
CH : Chinese model
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.
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SECTION 1
GENERAL
LOCATION OF PARTS AND CONTROLS
1 1/u (power) button
2 DISPLAY/DEMO button
3 SPECTRUM ANALYZER
button
4 Display Window
5 ENTER/NEXT button
6 TUNER MEMORY button
7 TUNING MODE button
8 TUNER/BAND button
9 TUNING (+/) button
0 STEREO/MONO button
!¡ EFFECT button
!TM GROOVE button
!£ FUNCTION button
!¢ VOLUME control
! SUPER WOOFER button
!§ GEQ control buttons
!¶ SUPER W MODE button
!· Deck B ª, · button
!ª Deck B p button
@º Deck B 0, ) button
@¡ Deck B r REC button
@TM Deck B P button
@£ CD SYNC button
@¢ H SPEED DUB button
@ Deck B 6 EJECT button
@§ CD · button
@¶ CD P button
@· CD p button
@ª REPEAT button
#º PLAY MODE button
#¡ AMS ± dial
#TM 1/ALL DISCS button
#£ EDIT button
#¢ CD 0, ) button
# DISC SKIP button
#§ 6 OPEN button
#¶ FLASH button
#· AUTO PBC indicator
#ª NEXT button
$º LOOP button
$¡ PBC indicator
$TM PREV button
$£ NON-STOP button
$¢ VCD indicator
$ ^ RETURN button
$§ DISC1-DISC5 buttons
$¶ Deck A 6 EJECT button
$· DOLBY NR button
$ª DIRECTION button
%º Deck A p button
%¡ Deck A 0, ) button
%TM Deck A ª, · button
%£ PHONES jack
%¢ KARAOKE PON/MPX
button
% KEY CONTROL ~ button
%§ KEY CONTROL n button
%¶ ENTER button
%· ECHO LEVEL knob
%ª MIC jack
^º MIC LEVEL knob
^¡ WAVE button
^TM DSP button
^£ PROLOGIC button
^¢ P FILE MEMORY button
^ GEQ CONTROL button
^§ Equalizer indicators
^¶ SLEEP button
^· DAILY 2 button
^ª DAILY 1 button
&º t/CLOCK SET button
&¡ REC button
1
8
34
5
7
6
2
9
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Front Panel
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SECTION 2
DISASSEMBLY
Note: Follow the disassembly procedure in the numerical order given.
2-1. FRONT PANEL
1 Three flat type wires
(CN401, CN402, CN701)
3 Front panel
2 Four screws (BVTP3x8)
This section is extracted from
instruction manual.