5 Troubleshooting
720C/920C
5-5
5-1-7 Abnormal H_Size
T402 Pin 8 waveform is right?
Check and replace T402.
Check some parts around D415, IC261
Pin 28, IC402 Pin 2 and IC201 Pin20.
Yes
No
5-1-8 Side Pin or Trap Failure
IC261 Pin 24 output exists?
Yes
Check and replace IC261.
Check and replace IC402.
Check some parts IC402 Pin 2
and IC261 Pin 24.
5-1-9 Para. or Pin Balance Failure
IC261 Pin 24 output varies with
different DAC values?
No
Replace IC261.
No
WAVEFORMS
9
9
29.8 V (T402, #8)
CH1 P-P = 29.8 V
CH1 RMS = 7.14 V
Содержание 720C
Страница 33: ...720C 920C 6 1 6 1 720C Exploded View and Parts List ...
Страница 34: ...720C 920C 6 2 6 2 920C Exploded View and Parts Lists ...
Страница 79: ...T601 C639 C609 C636 C638 L601 C604 D637 D608 10 1 Power Parts Schematic Diagram 720C 920C 10 1 ...
Страница 80: ...R299 720C 920C 10 2 10 2 MICOM Parts Schematic Diagram ...
Страница 81: ...720C 920C 10 3 10 3 Horizontal Vertical Processor Parts Schematic Diagram R265 C272 R262 ...
Страница 83: ...R561 R562 R501 C530 L521 R523 R526 720C 920C 10 5 10 5 High Voltage Parts Schematic Diagram ...
Страница 84: ...720C 10 6 1 10 6 1 720C Video Parts Schematic Diagram ...
Страница 86: ...720C 920C 10 7 10 7 Connector and Option Boards Parts Schematic Diagram CN142 slcon4p slcon4p CN141 CN208 ...