Sony HCD-XB88AVK User manual

– 1 –
MICROFILM
HCD-XB88AVK/XB88K
E Model
SPECIFICATIONS
Photo:HCD-XB88AVK
SERVICE MANUAL
COMPACT DISC DECK RECEIVER
— Continued on next page —
HCD-XB88AVK/XB88K is the
tuner, deck, CD and amplifier
sectioninLBT-XB88AVK/XB88K.
Model Name Using Similar Mechanism HCD-D670AV/N555AV
CD Mechanism Type CDM37L-5BD29AL
CDM37LH-5BD29AL
Base Unit Type BU-5BD29AL
Optical Pick-up Type KSS-213D/Q-NP
Model Name Using Similar Mechanism HCD-D670AV/N555AV
Tape Transport Mechanism Type TCM-220WR2
CD
SECTION
TAPE
DECK
SECTION

– 2 –
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.
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.
NOTES ON HANDLINGTHE 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
repain 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“CDsectionadjustment”and check
that the S curve waveform is output three times.
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.
MODEL IDENTIFICATION
— BACK PANEL —
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 –
TABLE OF CONTENTS
1. GENERAL ..........................................................................4
2. DISASSEMBLY
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
3. SERVICE MODE ............................................................10
4. MECHANICAL ADJUSTMENTS ..........................12
5. ELECTRICAL ADJUSTMENTS ............................... 12
6. DIAGRAMS
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. PrintedWiring 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. PrintedWiring 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. EXPLODEDVIEWS
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
8. ELECTRICAL PARTS LIST ........................................ 99

– 4 –
Front Panel
178 9!º!¡ !£
!¢
!∞
@§
@¶
@•
@ª
#¡
#£
#¢ #™
!§
2
3
4
6
@º @™@£ @¢
@¡
@∞
#∞
#§
#¶
#ª
$º
$¡ $¶ $ª
$•
$¢
$£
%¢
%∞
%§
%¶
!™
#º
$™
$§
$∞
%º
%¡
%™
%£
^º
^¡
%ª%•
^™
5
!¶
!•
#•
SECTION 1
GENERAL
!ª
^£

– 5 –
LOCATION OF PARTS AND CONTROLS
11/u button
2REC button
3t/CLOCK SET button
4DAILY 1 button
5DAILY 2 button
6SLEEP button
7DISPLAY/DEMO button
8SPECTRUMANALYZER button
9Display 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 pbutton
#¶ DIRECTION button
#• DOLBY NR button
#ª Deck A 0, )button
$º Deck A 6EJECT button
$¡ Deck B pbutton
$™ Deck B ª, ·button
$£ Deck B 0, )button
$¢ Deck B rREC button
$∞ Deck B Pbutton
$§ CD SYNC button
$¶ H SPEED DUB button
$• Deck B 6EJECT button
$ª 6OPEN button
%º CD ·button
%¡ CD pbutton
%™ CD Pbutton
%£ 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