Page 1
2
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.
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 ûC 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.
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.
Tuner section
FM stereo, FM/AM superheterodyne tuner
FM tuner section
Tuning range 87.5-108.0 MHz
Antenna FM lead antenna
Antenna terminals 75 W unbalanced
Intermediate frequency 10.7 MHz
AM tuner section
Tuning range
2 Band type: 531-1,602 kHz
(with the interval set at 9 kHz)
530-1,710 kHz
(with the interval set at 10 kHz)
3 Band type:
Middle Eastern models:
MW: 531-1,602 kHz
(with the interval set at 9 kHz)
SW: 5.95-17.90 MHz
(with the interval set at 5 kHz)
Other models:
MW: 531-1,602 kHz
(with the interval set at 9 kHz)
530-1,710 kHz
(with the interval set at 10 kHz)
SW: 5.95-17.90 MHz
(with the interval set at 5 kHz)
Antenna AM loop antenna
Antenna terminals External antenna terminal
Intermediate frequency 450 kHz
General
Power requirements
Thailand models: 220-240 V AC, 50/60 Hz
Other models: 110-120 V or 220-240 V AC, 50/60 Hz
Power consumption 110 W
Dimensions (w/h/d) Approx. 280 ´ 340 ´ 380 mm
(11 ´ 13
3/8 ´ 15 in.)
Mass: Approx. 9.5 kg
(21 lb.)
Supplied accessories: AM loop antenna (1)
Remote commander (1)
Batteries (2)
FM lead antenna (1)
Front speaker pads (8)
Video connecting cable (1)
Design and specifications are subject to change without notice.
Page 2
3
TABLE OF CONTENTS
1. Check the area of your repair for unsoldered or poorly-soldered
connections. Check the entire board surface for solder splashes
and bridges.
2. Check the interboard wiring to ensure that no wires are
"pinched" or contact high-wattage resistors.
3. Look for unauthorized replacement parts, particularly
transistors, that were installed during a previous repair. Point
them out to the customer and recommend their replacement.
4. Look for parts which, through functioning, show obvious signs
of deterioration. Point them out to the customer and
recommend their replacement.
5. Check the B+ voltage to see it is at the values specified.
6. Flexible Circuit Board Repairing
¥ Keep the temperature of the soldering iron around 270ûC
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.
SAFETY CHECK-OUT
After correcting the original service problem, perform the
following safety checks before releasing the set to the
customer. 1. SERVICING NOTES ááááááááááááááááááááááááááááááááááááááááááááááááááá\
4
2. GENERAL ááááááááááááááááááááááááááááááááááááááááááááááááááá\
ááááááááááááááááááá 5
3. DISASSEMBLY
3-1. Case ááááááááááááááááááááááááááááááááááááááááááááááááááá\
ááááááááááááááááááááááááááááááááá 7
3-2. Front Panel Section ááááááááááááááááááááááááááááááááááááááááááááááááááá\
ááááááááá 7
3-3. Tape Mechanism Deck Section
(TCM-230AWR2/230PWR2) áááááááááááááááááááááááááááááááááááááááááááá 8
3-4. CD Mechanism Deck section (CDM38L-5BD34L) áááááááááá 8
3-5. Main Board ááááááááááááááááááááááááááááááááááááááááááááááááááá\
áááááááááááááááááááááá 9
4. TEST MODE ááááááááááááááááááááááááááááááááááááááááááááááááááá\
ááááááááááááá 10
5. MECHANICAL ADJUSTMENTS áááááááááááááááááááááááááá 13
6. ELECTRICAL ADJUSTMENTS ááááááááááááááááááááááááááá 13
7. DIAGRAMS
7-1. Circrit Boards Location ááááááááááááááááááááááááááááááááááááááááááááááááááá\
á 18
7-2. Block Diagrams ááááááááááááááááááááááááááááááááááááááááááááááááááá\
ááááááááááááá 19
· CD Section ááááááááááááááááááááááááááááááááááááááááááááááááááá\
áááááááááááááááááá 19
· Video Section ááááááááááááááááááááááááááááááááááááááááááááááááááá\
áááááááááááááá 20
· Tape Deck Section ááááááááááááááááááááááááááááááááááááááááááááááááááá\
áááááá 21
· Main Section ááááááááááááááááááááááááááááááááááááááááááááááááááá\
ááááááááááááááá 22
· Display/Key Con Section áááááááááááááááááááááááááááááááááááááááááááááá 23
7-3. Printed Wiring Board Main Section ááááááááááááááááááááááááááááááá 25
7-4. Schematic Diagram Main Section (1/4) ááááááááááááááááááááááááá 26
7-5. Schematic Diagram Main Section (2/4) ááááááááááááááááááááááááá 27
7-6. Schematic Diagram Main Section (3/4) ááááááááááááááááááááááááá 28
7-7. Schematic Diagram Main Section (4/4) ááááááááááááááááááááááááá 29
7-8. Printed Wiring Board CD Section áááááááááááááááááááááááááááááááááá 30
7-9. Schematic Diagram CD Section ááááááááááááááááááááááááááááááááááááá 31
7-10. Printed Wiring Board CD Motor Section ááááááááááááááááááááááá 32
7-11. Schematic Diagram CD Motor Section áááááááááááááááááááááááááá 33
7-12. Printed Wirint Board Tape Deck Section ááááááááááááááááááááááá 34
7-13. Schematic Diagram Tape Deck Section ááááááááááááááááááááááááá 35
7-14. Printed Wiring Board Panel Section ááááááááááááááááááááááááááááááá 36
7-15. Schematic Diagram Panel Section ááááááááááááááááááááááááááááááááá 37
7-16. Printed Wiring Board AC Sec Standby Section ááááááááááááá 38
7-17. Schematic Diagram AC Sec Standby Section áááááááááááááááá 39
7-18. Printed Wiring Board Leaf SW Section ááááááááááááááááááááááááá 40
7-19. Schematic Diagram Leaf SW Section áááááááááááááááááááááááááááá 40
7-20. Printed Wiring Board CD SW Section ááááááááááááááááááááááááááá 41
7-21. Schematic Diagram CD SW Section áááááááááááááááááááááááááááááá 41
7-22. Printed Wiring Board Video Section áááááááááááááááááááááááááááááá 42
7-23. Schematic Diagram Video Section (1/3) áááááááááááááááááááááááá 43
7-24. Schematic Diagram Video Section (2/3) áááááááááááááááááááááááá 44
7-25. Schematic Diagram Video Section (3/3) áááááááááááááááááááááááá 45
7-26. IC Block Diagrams ááááááááááááááááááááááááááááááááááááááááááááááááááá\
áááááááá 46
7-27. IC PIN Function Description áááááááááááááááááááááááááááááááááááááááááááá 49
8. EXPLODED VIEWS
8-1. Case Section ááááááááááááááááááááááááááááááááááááááááááááááááááá\
áááááááááááááááááá 58
8-2. Front Panel Section ááááááááááááááááááááááááááááááááááááááááááááááááááá\
ááááááá 59
8-3. Chassis Section ááááááááááááááááááááááááááááááááááááááááááááááááááá\
áááááááááááááá 60
8-4. CD Mechanism Deck Section-1 (CDM38L-5BD34L) áááá 61
8-5. CD Mechanism Deck Section-2 (CDM38L-5BD34L) áááá 62
8-6. Base Unit Section (BU-5BD32L) ááááááááááááááááááááááááááááááááááááá 63
8-7. TC Mechanism Section-1(TCM-230AWR2/230PWR2) á 64
8-8. TC Mechanism Section-2(TCM-230AWR2/230PWR2) á 65
9. ELECTRICAL PARTS LIST ááááááááááááááááááááááááááááááááááá 66
