HCD-LX9AV/LX10AV/LX90AV
US Model
HCD-LX90AV
AEP Model
UK Model
HCD-LX9AV
E Model
Australian Model
HCD-LX10AV
SERVICE MANUAL
COMPACT HI-FI STEREO SYSTEM
Dolby noise reduction manufactured under license
from Dolby Laboratories Licensing Corporation.
"DOLBY" and the double-D symbol ; are trade-
marks of Dolby Laboratories Licensing Corporation.
Model Name Using Similar Mechanism
HCD-DR8AV/
W900AV
CD
CD Mechanism Type
CDM37M-5BD32L
Section
Base Unit Name
BU-5BD32L
Optical Pick-up Name
KSS-213D/Q-NP
Model Name Using Similar Mechanism
HCD-DR8AV/
Tape deck
W900AV
Section
Tape Transport Mechanism Type
TCM-230PWR1
· HCD-LX9AV/LX10AV/LX90AV
are
the
Amplifier, CD player, Tape Deck adn Tuner
section in LBT-LX9AV/LX10AV/LX90AV
-- Continued on next page --
SPECIFICATIONS
Photo: HCD-LX9AV
2
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINE WITH
MARK 0 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 IDENTIFÉS PAR UNE MARQUE 0 SUR LES
DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES PIÈCES SONT
CRITIQUES POUR LA SÉCURITÉ DE FONCTIONNEMENT. NE
REMPLACER CES COMPOSANTS QUE PAR DES PIÈSES SONY
DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU
DANS LES SUPPÉMENTS PUBLIÉS PAR SONY.
3
TABLE OF CONTENTS
After correcting the original service problem, perform the
following 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 microamperes).
Leakage 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 passive VOM that is suitable. Nearly all battery operated
digital multimeters that have a 2V AC range are suitable. (See
Fig. A)
SAFETY CHECK-OUT
To Exposed Metal
Parts on Set
0.15
µF
1.5 k
AC
Voltmeter
(0.75 V)
Earth Ground
Fig. A. Using an AC voltmeter to check AC leakage.
SECTION 1
SERVICE NOTES
1. SERVICING NOTES .................................................. 3
2. GENERAL ...................................................................... 5
3. DISASSEMBLY ............................................................. 8
4. SERVICE MODE .......................................................... 12
5. MECHANICAL ADJUSTMENTS ............................ 15
6. ELECTRICAL ADJUSTMENTS ............................. 15
7. DIAGRAMS
7-1. Circuit Board Locations .................................................... 20
7-2. Block Diagrams
Display/Power Section ...................................................... 21
Main Section ..................................................................... 22
Display/Power Section ...................................................... 23
7-3. Printed Wiring Board BD Board ................................. 24
7-4. Schematic Diagram BD Board .................................. 25
7-5. Printed Wiring Boards CD MOTOR Section ............. 26
7-6. Schematic Diagram CD MOTOR Section ................. 27
7-7. Printed Wiring Board AUDIO Board ......................... 28
7-8. Schematic Diagram AUDIO Board ........................... 29
7-9. Printed Wiring Board LEAF SW Board .................... 30
7-10. Schematic Diagram LEAF SW Board ....................... 30
7-11. Printed Wiring Board MAIN Board .......................... 31
7-12. Schematic Diagram MAIN Board (1/3) .................... 32
7-13. Schematic Diagram MAIN Board (2/3) .................... 33
7-14. Schematic Diagram MAIN Board (3/3) .................... 34
7-15. Printed Wiring Board PANEL FL Board ................... 36
7-16. Schematic Diagram PANEL FL Board ...................... 37
7-17. Printed Wiring Board PANEL VR Board .................. 38
7-18. Schematic Diagram PANEL VR Board ..................... 39
7-19. Printed Wiring Boards TC-A/TC-B/CD-L/
CD-L2/CD-R/CD-R2 Boards ........................................ 40
7-20. Schematic Diagram TC-A/TC-B/CD-L/
CD-L2/CD-R/CD-R2 Boards ........................................ 41
7-21. Printed Wiring Boards FRONT INPUT/
HEADPHONE/MIC Boards .......................................... 42
7-22. Schematic Diagram FRONT INPUT/
HEADPHONE/MIC Boards .......................................... 43
7-23. Printed Wiring Board PA Board ................................ 44
7-24. Schematic Diagram PA Board ................................... 45
7-25. Printed Wiring Board SURROUND Board ............... 46
7-26. Schematic Diagram SURROUND Board .................. 47
7-27. Printed Wiring Boards
TRANS/SUB TRANS Boards ................................... 48
7-28. Schematic Diagram TRANS/SUB TRANS Boards .. 49
8. EXPLODED VIEWS ................................................... 55
9. ELECTRICAL PARTS LIST ................................... 63
4
This appliance is classified as a CLASS 1 LASER product.
The CLASS 1 LASER PRODUCT MARKING is located on
the rear exterior.
Laser component in this product is capable of emitting radiation
exceeding the limit for Class 1.
The following caution label is located inside the 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,
observe from more than 30 cm away from the objective lens.
Notes on chip component replacement
· Never reuse a disconnected chip component.
· Notice that the minus side of a tantalum capacitor may be dam-
aged by heat.
Flexible Circuit Board Repairing
· Keep the temperature of the soldering iron around 270 °C dur-
ing 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.
NOTES ON HANDLING THE OPTICAL PICK-UP
BLOCK OR BASE UNIT
CAUTION
Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous
radiation exposure.
5
1
23
4 5
6
8
0
9
qs
qd
7
qf
qg
qh
qj
ql
w;
wa
ws
wd
wf
qa
qk
SECTION 2
GENERAL
LOCATION OF CONTROLS
Front Panel
Photo: HCD-LX9AV
1
?/1 (POWER) button
2
DAILY button
REC button
SLEEP button
c
/CLOCK SET button
3
TUNER/BAND button
TUNING +/ button
ENTER/NEXT button
TUNER MEMORY button
STEREO/MONO button
TUNING MODE button
PTY button
4
Display
5
v/B/V/b button
6
SYNC EQ button
SYNC BASS button
SURROUND button
MIX GUITAR/KARAOKE button
7
FUNCTION button
8
VOLUME control
9
PHONES jack
0
DECK B operating button
g button
G button
x button
m button
M button
X button
z REC button
HI SPEED DUB button
CD SYNC button
qa
. AMS > control
qs
CD operating button
G X button
x button
m button
M button
DISC SKIP button
qd
VIDEO 2 INPUT jack
qf
PLAY MODE button
REPEAT button
qg
DECK B
qh
Z A EJECT
Z B EJECT
qj
DECK A
qk
DISC1-5 button
ql
LOOP button
FLASH button
NON-STOP button
EDIT button
w;
SUPPER WOOFER MODE button
MIC LEVEL control
GUITAR LEVEL contro
wa
DECK A operating button
g button
G button
x button
m button
M button
DIRECTION button
DOLBY NR button
ws
MIC MIX jack
GUITAR jackl
wd
EFFECT button
GROOVE button
SUPER WOOFER button
wf
POWER SAVE/DEMO (STAND BY) button
DISPLAY button
SPECTRUM ANALYZER button