Table of Contents
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TABLE OF CONTENTS
·········································································· 5
6-1. Circuit Boards Location ·············································· 24
6-2. Block Diagrams ··························································· 25
6-5. Printed Wiring Board
6-6. Printed Wiring Board
6-11. Schematic Diagram
6-12. Printed Wiring Board
6-13. Schematic Diagram
6-14. Printed Wiring Board
6-15. Schematic Diagram
6-16. Schematic Diagram
6-17. Printed Wiring Board
6-18. Schematic Diagram
6-19. Printed Wiring Board
TE
L 13942296513
6-20. Schematic Diagram
6-21. Waveforms ··································································· 46
6-24. Printed Wiring Board
6-25. Schematic Diagram
6-26. Printed Wiring Board
6-28. Printed Wiring Boards
6-29. Schematic Diagram
6-30. IC Block Diagrams ······················································ 54
6-31. IC Pin Function Description ········································ 56
1.
Check the area of your repair for unsoldered or poorly-soldered
connections. Check the entire board surface for solder splashes
and bridges.
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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.
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································································ 8
···························································· 16
····························· 19
······························· 19
Video CD Section (1/2) ·········· 29
Video CD Section (2/2) ·········· 30
Video CD Section ················ 31
BD Board ···························· 32
BD Board ······························· 33
Sensor/Motor Section ········ 34
Sensor/Motor Section ············ 35
Audio Board ························ 36
Audio Board ·························· 37
Leaf SW Board ··················· 38
Leaf SW Board ······················ 38
Main Board ························· 39
Main Board (1/2) ··················· 40
Main Board (2/2) ··················· 41
Panel Board ························· 42
Sub Panel Board ·················· 44
Sub Panel Board ···················· 45
Mic Board ··························· 46
Mic Board ······························ 47
Front AMP Board ················ 48
Front AMP Board ·················· 49
Surround AMP Board ········· 50
Surround AMP Board ············ 51
Trans Board ······················· 52
Trans Board ···························· 53
................................................... 61
................................... 68
SAFETY CHECK-OUT
After correcting the original service problem, perform the following safety
checks before releasing the set to the customer.
x
i
2 9
8
MODEL IDENTIFICATION
- BACK PANEL -
PARTS No.
4-227-555-0s
4-227-555-1s
4-227-555-2s
4-227-555-3s
4-227-555-4s
• Abbreviation
3
6 7
1 3
EA
1 5
SP
MY
TH
HK
CH
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
co
circuit board (within 3 times).
.
• Be careful not to apply force on the conductor when soldering
or unsoldering.
9 4
2 8
Parts No.
MODEL
EA
MY, SP
HK
TH
CH
0 5
: Saudi Arabia model.
8
2 9
9 4
2 8
: Singapore model.
: Malaysia model.
: Thai model.
: Hong Kong model.
: Chinese model.
m
9 9
9 9
3
- Quick Links:
- General
- Service Mode
- Electrical Adjustments
- Audio Board
- Front Amp Board
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