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SERVICE MANUAL
COMPACT Hi-Fi STEREO SYSTEM
US Model
HCD-LX30/LX50
Canadian Model
HCD-LX50
AEP Model
UK Model
HCD-LX5
E Model
Australian Model
HCD-LX6
SPECIFICATIONS
HCD-LX5/LX6/LX30/LX50
Photo: HCD-LX50
Dolby noise reduction manufactured under license
from Dolby Laboratories Licensing Corporation.
“DOLBY” and the double-D symbol
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-D290/G3300/XB3
CD Mechanism Type
CDM37M-5BD32L
Base Unit Name
BU-5BD32L
Optical Pick-up Name
KSS-213D/Q-NP
Model Name Using Similar Mechanism
HCD-DR4
Tape Transport Mechanism Type
TCM-230PWR1
HCD-LX5/LX6/LX30/LX50 are the
Amplifier, CD player, Tape Deck and Tuner
section in LBT-LX5/LX6/LX30/LX50.
Amplifier, CD player, Tape Deck and Tuner
section in LBT-LX5/LX6/LX30/LX50.
CD
Section
Section
TAPE
Section
Section
– Continued on next page –
2
ATTENTION AU COMPOSANT AYANT RAPPORT
À LA SÉCURITÉ!
LES COMPOSANTS IDENTIFIÉS PAR UNE MARQUE
0
SUR LES DIAGRAMMES SCHÉMATIQUES ET LA LISTE
DES PIÈCES SONT CRITIQUES POUR LA SÉCURITÉ
DE FONCTIONNEMENT. NE REMPLACER CES COM-
POSANTS QUE PAR DES PIÈCES SONY DONT LES
NUMÉROS SONT DONNÉS DANS CE MANUEL OU
DANS LES SUPPLÉMENTS PUBLIÉS PAR SONY.
DES PIÈCES SONT CRITIQUES POUR LA SÉCURITÉ
DE FONCTIONNEMENT. NE REMPLACER CES COM-
POSANTS QUE PAR DES PIÈCES SONY DONT LES
NUMÉROS SONT DONNÉS DANS CE MANUEL OU
DANS LES SUPPLÉMENTS PUBLIÉS PAR SONY.
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 PUB-
LISHED BY SONY.
OPERATION. REPLACE THESE COMPONENTS WITH
SONY PARTS WHOSE PART NUMBERS APPEAR AS
SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUB-
LISHED BY SONY.
3
SECTION 1
SERVICING NOTES
1.
SERVICING NOTES
...............................................
3
2.
GENERAL
Location of Controls .......................................................
4
Setting the Time ..............................................................
6
3.
DISASSEMBLY
.........................................................
7
4.
DIAGRAMS
4-1. Note for Printed Wiring Boards and
Schematic Diagrams ....................................................... 11
4-2. Printed Wiring Board – BD Board – .............................. 12
4-3. Schematic Diagram – BD Board – ................................ 13
4-4. Printed Wiring Boards – CD MOTOR Section – .......... 14
4-5. Schematic Diagram – CD MOTOR Section – .............. 15
4-6. Printed Wiring Board – AUDIO Board – ...................... 16
4-7. Schematic Diagram – AUDIO Board – ......................... 17
4-8. Printed Wiring Board – LEAF SW Board – .................. 18
4-9. Schematic Diagram – LEAF SW Board – ..................... 18
4-10. Printed Wiring Board – MAIN Board – ........................ 19
4-11. Schematic Diagram – MAIN Board (1/3) – .................. 20
4-12. Schematic Diagram – MAIN Board (2/3) – .................. 21
4-13. Schematic Diagram – MAIN Board (3/3) – .................. 22
4-14. Printed Wiring Board – PANEL FL Board – ................. 24
4-15. Schematic Diagram – PANEL FL Board – .................... 25
4-16. Printed Wiring Board – PANEL VR Board – ................ 26
4-17. Schematic Diagram – PANEL VR Board – ................... 27
4-18. Printed Wiring Boards – TC-A/TC-B/CD-L/
4-3. Schematic Diagram – BD Board – ................................ 13
4-4. Printed Wiring Boards – CD MOTOR Section – .......... 14
4-5. Schematic Diagram – CD MOTOR Section – .............. 15
4-6. Printed Wiring Board – AUDIO Board – ...................... 16
4-7. Schematic Diagram – AUDIO Board – ......................... 17
4-8. Printed Wiring Board – LEAF SW Board – .................. 18
4-9. Schematic Diagram – LEAF SW Board – ..................... 18
4-10. Printed Wiring Board – MAIN Board – ........................ 19
4-11. Schematic Diagram – MAIN Board (1/3) – .................. 20
4-12. Schematic Diagram – MAIN Board (2/3) – .................. 21
4-13. Schematic Diagram – MAIN Board (3/3) – .................. 22
4-14. Printed Wiring Board – PANEL FL Board – ................. 24
4-15. Schematic Diagram – PANEL FL Board – .................... 25
4-16. Printed Wiring Board – PANEL VR Board – ................ 26
4-17. Schematic Diagram – PANEL VR Board – ................... 27
4-18. Printed Wiring Boards – TC-A/TC-B/CD-L/
CD-L2/CD-R/CD-R2 Boards – ...................................... 28
4-19. Schematic Diagram – TC-A/TC-B/CD-L/
CD-L2/CD-R/CD-R2 Boards – ...................................... 29
4-20. Printed Wiring Boards – FRONT INPUT/
HEADPHONE/MIC Boards – ........................................ 30
4-21. Schematic Diagram – FRONT INPUT/
HEADPHONE/MIC Boards – ........................................ 31
4-22. Printed Wiring Board – PA Board – .............................. 32
4-23. Schematic Diagram – PA Board – ................................. 33
4-24. Printed Wiring Boards – TRANS/SUB TRANS
4-23. Schematic Diagram – PA Board – ................................. 33
4-24. Printed Wiring Boards – TRANS/SUB TRANS
(LX5/LX30/LX50) Boards – .......................................... 34
4-25. Schematic Diagram – TRANS/SUB TRANS
(LX5/LX30/LX50) Boards – .......................................... 35
5.
EXPLODED VIEWS
................................................ 38
6.
ELECTRICAL PARTS LIST
............................... 46
TABLE OF CONTENTS
SAFETY CHECK-OUT
After correcting the original service problem, perform the follow-
ing safety check 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.
ing safety check 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 TEST
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
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.
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” indica-
tion is 0.75 V, so analog meters must have an accurate low-
voltage scale. The Simpson 250 and Sanwa SH-63Trd are ex-
amples of a passive VOM that is suitable. Nearly all battery
operated digital multimeters that have a 2 V AC range are suit-
able. (See Fig. A)
tion is 0.75 V, so analog meters must have an accurate low-
voltage scale. The Simpson 250 and Sanwa SH-63Trd are ex-
amples of a passive VOM that is suitable. Nearly all battery
operated digital multimeters that have a 2 V AC range are suit-
able. (See Fig. A)
Fig. A.
Using an AC voltmeter to check AC leakage.
1.5 k
Ω
0.15
µ
F
AC
voltmeter
(0.75 V)
voltmeter
(0.75 V)
To Exposed Metal
Parts on Set
Parts on Set
Earth Ground
4
This appliance is classified as a CLASS 1 LASER product.
The CLASS 1 LASER PRODUCT MARKING is located on
the rear exterior.
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.
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 electro-
static 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.
static 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 emis-
sion, observe from more than 30 cm away from the objective lens.
on the disc reflective surface by the objective lens in the optical
pick-up block. Therefore, when checking the laser diode emis-
sion, 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-
• 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
BLOCK OR BASE UNIT
CAUTION
Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous ra-
diation exposure.
other than those specified herein may result in hazardous ra-
diation exposure.
SECTION 2
GENERAL
LOCATION OF CONTROLS
– Front Panel –
– Front Panel –
1
wf
ws
wd
ql
wa
w;
qk
qj
5
7
6
8
9
0
qa
qs
qd
qf
qg
qh
2
4
3
2
1
9
8
7
6
5
4
3
– Rear Panel –
