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­ 1 ­
MICROFILM
HCD-D890AV/XB55AV/
XB80AV/XB88AV
Canadian Model
HCD-D890AV
AEP Model
UK Model
HCD-XB80AV
E Model
HCD-XB88AV
Australian Model
HCD-XB55AV/XB88AV
SPECIFICATIONS
Photo: HCD-XB88AV
SERVICE MANUAL
COMPACT DISC DECK RECEIVER
-- Continued on next page --
HCD-D890AV/XB55AV/XB80AV/XB88AV is
the tuner, deck, CD and amplifier section in
LBT-D890AV/XB55AV/XB80AV/XB88AV.
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


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­ 2 ­
MODEL IDENTIFICATION
-- BACK PANEL --
4-996-861-0
4-996-861-2
4-996-861-3
4-996-861-4
4-996-861-8
4-996-862-1
4-996-862-2
4-996-862-3
4-996-862-5
XR88AV : AR, E model
XR88AV : MX model
XR88AV : AUS model
XR88AV : SAF model
XB55AV : AUS model
D890AV : CND model
XB80AV : AEP, UK model
XB80AV : EE, CIS model
XB80AV : AEP model
PARTS No.
MODEL
PRODUCT COUNTRY
INDONESIA PRODUCT
INDONESIA PRODUCT
INDONESIA PRODUCT
INDONESIA PRODUCT
INDONESIA PRODUCT
INDONESIA PRODUCT
INDONESIA PRODUCT
INDONESIA PRODUCT
THAILAND PRODUCT
· Abbreviation
CND : Canadian model
EE
: East European model
SAF : South Africa model
MX : Mexican model
AUS : Australian model
AR
: Argentine model
Parts No.


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­ 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 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 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
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 "CD section adjustment" 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.
ATTENTION AU COMPOSANT AYANT RAPPORT
À LA SÉCURITÉ!!
LES COMPOSANTS IDENTIFIÉS PAR UNE MARQUE ! SUR
LES DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES
PIÈCES SONT CRITIQUES POUR LA SÉCURITÉ DE
FONCTIONNEMENT. NE REMPLACER CES COMPOSANTS
QUE PAR DES PIÈCES SONY DONT LES NUMÉROS
SONT DONNÉS DANS CE MANUEL OU DANS LES
SUPPLÉMENTS PUBLIÉS PAR SONY.
SAFETY CHECK-OUT
After correcting the original service problem, perform the follow-
ing safety checks before releasing the set to the customer:
Check the antenna terminals, metal trim, "metallized" knobs, screws,
and all other exposed metal parts for AC leakage. Check leakage as
described below.
LEAKAGE
The AC leakage from any exposed metal part to earth Ground and
from all exposed metal parts to any exposed metal part having a
return to chassis, must not exceed 0.5 mA (500 microampers). Leak-
age current can be measured by any one of three methods.
1. A commercial leakage tester, such as the Simpson 229 or RCA
WT-540A. Follow the manufacturers' instructions to use these
instruments.
2. A battery-operated AC milliammeter. The Data Precision 245
digital multimeter is suitable for this job.
3. Measuring the voltage drop across a resistor by means of a VOM
or battery-operated AC voltmeter. The "limit" indication is 0.75
V, so analog meters must have an accurate low-voltage scale.
The Simpson 250 and Sanwa SH-63Trd are examples of a pas-
sive VOM that is suitable. Nearly all battery operated digital
multimeters that have a 2V AC range are suitable. (See Fig. A)
Fig. A. Using an AC voltmeter to check AC leakage.
The following
caution label is
located inside of
the unit.
0.15
µF
To Exposed Metal
Parts on Set
1.5k
AC
voltmeter
(0.75V)
Earth Ground


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­ 4 ­
SECTION 1
GENERAL
TABLE OF CONTENTS
LOCATION OF PARTS AND CONTROLS
6-9. Printed Wiring Board ­ Main Section ­ .............................. 43
6-10. Schematic Diagram ­ Main (1/5) Section ­ ..................... 45
6-11. Schematic Diagram ­ Main (2/5) Section ­ ..................... 47
6-12. Schematic Diagram ­ Main (3/5) Section ­ ..................... 49
6-13. Schematic Diagram ­ Main (4/5) Section ­ ..................... 51
6-14. Schematic Diagram ­ Main (5/5) Section ­ ..................... 53
6-15. Printed Wiring Board ­ Deck Section ­ ........................... 55
6-16. Schematic Diagram ­ Deck Section ­ .............................. 57
6-17. Printed Wiring Board ­ Power Section ­ ......................... 59
6-18. Schematic Diagram ­ Power Section ­ ............................ 61
6-19. Schematic Diagram ­ Panel Section ­ ............................. 63
6-20. Printed Wiring Board ­ Panel Section ­ ........................... 65
6-21. Printed Wiring Board ­ TC/CD Panel-1 Section ­ ........... 67
6-22. Schematic Diagram ­ TC/CD Panel-1 Section ­ ............. 69
6-23. Schematic Diagram ­ HP/Mic Section ­ .......................... 71
6-24. Printed Wiring Board ­ HP/Mic Section ­ ....................... 73
6-25. Printed Wiring Board ­ CD Motor Section ­ ................... 75
6-26. Schematic Diagram ­ CD Motor Section ­ ...................... 77
6-27. Printed Wiring Board ­ Trans Section ­ ........................... 79
6-28. Schematic Diagram ­ Trans Section ­ ............................. 81
6-29. Printed Wiring Board ­ Surround Section ­ ..................... 83
6-30. Schematic Diagram ­ Surround Section ­ ....................... 84
6-31. IC Block Diagrams ........................................................... 85
6-32. IC Pin Functions ............................................................... 92
7. EXPLODED VIEWS
7-1. Case and Back Panel Section ............................................ 100
7-2. Front Panel Section 1 ........................................................ 101
7-3. Front Panel Section 2 ........................................................ 102
7-4. Chassis Section ................................................................. 103
7-5. TC Mechanism Section-1 (TCM-220WR2) ..................... 104
7-6. TC Mechanism Section-2 (TCM-220WR2) ..................... 105
7-7. TC Mechanism Section-3 (TCM-220WR2) ..................... 106
7-8. CD Mechanism Section
(CDM37L-5BD29AL/CMD37LH-5BD29AL) ................ 107
7-9. Base Unit Section (BU-5BD29AL) .................................. 108
8. ELECTRICAL PARTS LIST ...................................... 109
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
!TM TUNING MODE button
!£ TUNER/BAND button
!¢ TUNING (+/­) button
! PTY button
(AEP, UK)
!§ STEREO/MONO button
!¶ Equalizer indicators
!· MIC LEVEL knob
!ª MIC jack
@º DSP button
@¡ WAVE button
@TM 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
(XB80AV/XB88AV)
#º DBFB button (D890AV/XB55AV)
#¡ GEQ control buttons
#TM GEQ CONTROL button
#£ SUPER W MODE button
(XB80AV/XB88AV)
#¢ 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
$TM 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
%TM 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
^TM EDIT button
^£ AMS ± dial
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 ...................................................... 18
6-2. Brock Diagrams
· Tuner Section (AEP, UK model) ..................................... 19
· Tuner Section (East European, CIS model) ..................... 21
· CD Section ....................................................................... 23
· Deck Section .................................................................... 25
· Main Section .................................................................... 27
· Power Section .................................................................. 29
6-3. Printed Wiring Board ­ CD Section ­ ................................. 33
6-4. Schematic Diagram ­ CD Section ­ ................................... 35
6-5. Schematic Diagram
­ Tuner Section ­ (AEP, UK model) ................................... 37
6-6. Printed Wiring Board
­ Tuner Section ­ (AEP, UK model) ................................... 39
6-7. Printed Wiring Board
­ Tuner Section ­ (East European, CIS model) .................. 40
6-8. Schematic Diagram
­ Tuner Section ­ (East European, CIS model) .................. 41


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­ 5 ­
Front Panel
17 8
9!º !¡
!
#TM
2
3
4
6
@TM
@
#
%
!TM
$TM
$
%TM
^TM
5