DOWNLOAD Sony HCD-XB88AVK / HCD-XB88K / LBT-XB88AVK / LBT-XB88KS Service Manual ↓ Size: 8.28 MB | Pages: 86 in PDF or view online for FREE

– 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.

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
repain 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 three times.

!

!

4-996-861-1π
4-996-861-6π
4-996-861-7π
4-996-861-9π

XR88AVK : SP, MY model
XR88AVK : E, IA model
XR88AVK : EA model
XR88K : TH model

PARTS No.

MODEL

• Abbreviation

EA

: Saudi Arabia model

SP

: Singapore model

MY : Malaysia model
TH

: Thai model

IA

: Indonesian model

The following
caution label is
located inside of
the unit.

Parts No.

– 3 –

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

2-1. Front Panel ........................................................................... 6
2-2. Main Board ........................................................................... 6
2-3. Tape Mechanism Deck .......................................................... 7
2-4. Cassette Lid Assembly .......................................................... 7
2-5. CD Lid Assembly .................................................................. 8
2-6. CD Mechanism Deck ............................................................ 8
2-7. Base Unit .............................................................................. 8
2-8. Disc Table ............................................................................. 9

............................................................ 10

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

12

............................... 12

6-1. Circuit Boards Location ...................................................... 16
6-2. Block Diagrams

• CD Section ....................................................................... 17
• Deck Section .................................................................... 19
• Main Section .................................................................... 21
• Power Section .................................................................. 23
• Key Con Section .............................................................. 25

6-3. Schematic Diagram – Key Con Section – ........................... 29
6-4. Printed Wiring Board – Key Con Section – ........................ 30
6-5. Printed Wiring Board – CD Section – ................................. 31
6-6. Schematic Diagram – CD Section – ................................... 33
6-7. Printed Wiring Board – Main Section – .............................. 35
6-8. Schematic Diagram – Main (1/5) Section – ........................ 37
6-9. Schematic Diagram – Main (2/5) Section – ........................ 39
6-10. Schematic Diagram – Main (3/5) Section – ..................... 41
6-11. Schematic Diagram – Main (4/5) Section – ..................... 43
6-12. Schematic Diagram – Main (5/5) Section – ..................... 45
6-13. Printed Wiring Board – Deck Section – ........................... 47
6-14. Schematic Diagram – Deck Section – .............................. 49
6-15. Printed Wiring Board – Power Section – ......................... 51
6-16. Schematic Diagram – Power Section – ............................ 53
6-17. Schematic Diagram – Panel Section – ............................. 55
6-18. Printed Wiring Board – Panel Section – ........................... 57
6-19. Printed Wiring Board – TC/CD Panel-1 Section – ........... 59
6-20. Schematic Diagram – TC/CD Panel-1 Section – ............. 61
6-21. Schematic Diagram – HP/Mic Section – .......................... 63
6-22. Printed Wiring Board – HP/Mic Section – ....................... 65
6-23. Printed Wiring Board – CD Motor Section – ................... 67
6-24. Schematic Diagram – CD Motor Section – ...................... 69
6-25. Printed Wiring Board – Trans Section – ........................... 71
6-26. Schematic Diagram – Trans Section – ............................. 73
6-27. Printed Wiring Board – Surround Section – ..................... 75
6-28. Schematic Diagram – Surround Section – ....................... 76
6-29. IC Block Diagrams ........................................................... 77
6-30. IC Pin Functions ............................................................... 82

7-1. Case and Back Panel Section .............................................. 90
7-2. Front Panel Section 1 .......................................................... 91
7-3. Front Panel Section 2 .......................................................... 92
7-4. Chassis Section ................................................................... 93
7-5. TC Mechanism Section-1 (TCM-220WR2) ....................... 94
7-6. TC Mechanism Section-2 (TCM-220WR2) ....................... 95
7-7. TC Mechanism Section-3 (TCM-220WR2) ....................... 96
7-8. CD Mechanism Section

(CDM37L-5BD29AL/CMD37LH-5BD29AL) .................. 97

7-9. Base Unit Section (BU-5BD29AL) .................................... 98

........................................ 99

– 4 –

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7 8

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– 5 –

1 1/u button

2 REC button
3 t/CLOCK SET button
4 DAILY 1 button

5 DAILY 2 button
6 SLEEP button

7 DISPLAY/DEMO button
8 SPECTRUM ANALYZER button
9 Display Window

!º ENTER/NEXT button
!¡ TUNER MEMORY button

!™ TUNING MODE button
!£ TUNER/BAND button
!¢ TUNING (+/–) button

!∞ STEREO/MONO button
!§ Equalizer indicators

!¶ MIC LEVEL knob
!• MIC 1, MIC 2 jack
!ª ECHO LEVEL knob

@º DSP button
@¡ WAVE button

@™ PROLOGIC button
@£ KARAOKE PON/MPX button
@¢ P FILE MEMORY button

@∞ PHONES jack
@§ EFFECT button

@¶ FUNCTION button
@• GROOVE button
@ª VOLUME control

#º SUPER WOOFER button
#¡ GEQ control buttons

#™ GEQ CONTROL button
#£ SUPER W MODE button
#¢ ENTER button

#∞ Deck A ª, · button
#§ Deck A p button

#¶ DIRECTION button
#• DOLBY NR button
#ª Deck A 0, ) button

$º Deck A 6 EJECT button
$¡ Deck B p button

$™ Deck B ª, · button
$£ 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
$ª 6 OPEN button

%º CD · button
%¡ CD p button

%™ CD P button
%£ DISC SKIP button
%¢ DISC1-DISC5 buttons

%∞ NON-STOP button
%§ LOOP button

%¶ FLASH button
%• 1/ALL DISCS button
%ª PLAY MODE button

^º CD 0, ) button
^¡ REPEAT button

^™ EDIT button
^£ ≠ AMS ± dial