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 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.
SAFETY CHECK-OUT
After correcting the original service problem, perform the
following safety checks before releasing the set to the
customer.
1.
SERVICING NOTES
··················································· 4
2.
GENERAL
······································································ 5
3.
DISASSEMBLY
3-1.
Case ···················································································· 7
3-2.
Front Panel Section ···························································· 7
3-3.
Tape Mechanism Deck Section
(TCM-230AWR2/230PWR2) ············································ 8
3-4.
CD Mechanism Deck section (CDM38L-5BD34L) ·········· 8
3-5.
Main Board ········································································· 9
4.
TEST MODE
································································ 10
5.
MECHANICAL ADJUSTMENTS
·························· 13
6.
ELECTRICAL ADJUSTMENTS
··························· 13
7.
DIAGRAMS
7-1.
Circrit Boards Location ···················································· 18
7-2.
Block Diagrams ································································ 19
•
CD Section ····································································· 19
•
Video Section ································································· 20
•
Tape Deck Section ························································· 21
•
Main Section ·································································· 22
•
Display/Key Con Section ·············································· 23
7-3.
Printed Wiring Board Main Section ······························· 25
7-4.
Schematic Diagram Main Section (1/4) ························· 26
7-5.
Schematic Diagram Main Section (2/4) ························· 27
7-6.
Schematic Diagram Main Section (3/4) ························· 28
7-7.
Schematic Diagram Main Section (4/4) ························· 29
7-8.
Printed Wiring Board CD Section ·································· 30
7-9.
Schematic Diagram CD Section ····································· 31
7-10. Printed Wiring Board CD Motor Section ······················· 32
7-11. Schematic Diagram CD Motor Section ·························· 33
7-12. Printed Wirint Board Tape Deck Section ······················· 34
7-13. Schematic Diagram Tape Deck Section ························· 35
7-14. Printed Wiring Board Panel Section ······························· 36
7-15. Schematic Diagram Panel Section ································· 37
7-16. Printed Wiring Board AC Sec Standby Section ············· 38
7-17. Schematic Diagram AC Sec Standby Section ················ 39
7-18. Printed Wiring Board Leaf SW Section ························· 40
7-19. Schematic Diagram Leaf SW Section ···························· 40
7-20. Printed Wiring Board CD SW Section ··························· 41
7-21. Schematic Diagram CD SW Section ······························ 41
7-22. Printed Wiring Board Video Section ······························ 42
7-23. Schematic Diagram Video Section (1/3) ························ 43
7-24. Schematic Diagram Video Section (2/3) ························ 44
7-25. Schematic Diagram Video Section (3/3) ························ 45
7-26. IC Block Diagrams ··························································· 46
7-27. IC PIN Function Description ············································ 49
Case Section ····································································· 58
8-2.
Front Panel Section ·························································· 59
8-3.
Chassis Section ································································· 60
8-4.
CD Mechanism Deck Section-1 (CDM38L-5BD34L) ···· 61
8-5.
CD Mechanism Deck Section-2 (CDM38L-5BD34L) ···· 62
8-6.
Base Unit Section (BU-5BD32L) ····································· 63
8-7.
TC Mechanism Section-1(TCM-230AWR2/230PWR2) · 64
8-8.
TC Mechanism Section-2(TCM-230AWR2/230PWR2) · 65
9.
ELECTRICAL PARTS LIST
··································· 66
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