CONFIDENTIAL
4 Troubleshooting
4-2
GH15H*
Check CN102.
No
Does the H-sync pulse
appear at Pin 9 of IC108?
Replace IC108 or
check its related circuit.
check CN102.
No
Does the H-sync pulse
appear at Pin 150 of IC105?
Yes
Yes
No
4
Does the V-sync pulse
appeaer at Pin 30 of IC301?
2
Replace IC301 or
check its related circuit.
No
Yes
Does the V-sync pulse
appeaer at Pin 148 of IC105?
3
Replace IC105 or
check its related circuit.
No
Yes
No
Yes
Replace IC251 or
check its related circuit.
No
Yes
Replace LCD Panel
Yes
1
4-2 No Video
Does the clock pulse
appeaer at Pin 44 of IC105?
5
Do the pulse appeaer
at Pin 43 of IC105?
6
Does the waveforms
appeaer at Pin 3
and 16 of CN201?
7
Summary of Contents for GH15H series
Page 11: ...CONFIDENTIAL Memo 3 Disassembly and Reassembly 3 4 GH15H ...
Page 14: ...CONFIDENTIAL 4 Troubleshooting GH15H 4 3 1 5 6 7 2 3 4 WAVEFORMS ...
Page 18: ...CONFIDENTIAL GH15H 5 1 5 Exploded View and Parts List ...
Page 19: ...5 Exploded View Parts List 5 2 GH15H Memo CONFIDENTIAL ...
Page 31: ...Memo 6 Electrical Parts List 6 12 GH15H CONFIDENTIAL ...
Page 32: ...CONFIDENTIAL GH15H 7 1 7 Block Diagram ...
Page 33: ...CONFIDENTIAL 7 Block Diagrams 7 2 GH15H Memo ...
Page 34: ...CONFIDENTIAL 8 Wiring Diagram GH15H 8 1 8 Wiring Diagram ...
Page 35: ...Memo 8 Wiring Diagram 8 2 GH15H CONFIDENTIAL ...
Page 37: ...CONFIDENTIAL 9 2 GH15H 1 5 6 7 2 3 4 9 Schematic Diagrams ...
Page 39: ...CONFIDENTIAL 9 Schematic Diagrams 9 4 GH15H Memo ...
