HCD-V8900, HCD-V8900AV, LBT-V8900AV - Sony Audio Service Manual (repair manual)

– 1 –

MICROFILM

HCD-V8900/V8900AV is the tuner, deck, CD and
amplifier section in LBT-V8900AV/V8900S.

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

– 2 –

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

• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be

 damaged by heat.

• 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.

!

!

– 3 –

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

8-1. 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

...................................... 122

.......................................................................... 4

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

.............................................................. 9

..................................................................... 11

..........................

12

............................... 12

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

V8900AV: SP, MY

V8900AV: CH

V8900AV: IA

V8900

MODEL

PARTS No.

4-900-073-0π

4-900-073-1π

4-900-073-2π

4-900-073-3π

• Abbreviation

SP : Singapore model
MY : Malaysia model
IA : Indonesian model
CH : Chinese model

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.

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.

Carry out the “S curve check” in “CD section adjustment” and check
that the S curve waveform is output two times.

– 4 –

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
!™ 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

@™ 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

#™ 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
$™ PREV button

$£ NON-STOP button
$¢ VCD indicator

$∞ ˆ 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
%™ 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

^™ 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

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