5 Troubleshooting
720C/920C
5-15
Is G2 voltage right?
Is blank pulse on Pin 27 of IC101
(17”: Pin 23 of IC104) on Video
board?
Check CN102, Q104 (17”: Q103).
Yes
Yes
No
Check G2 control volume and FBT.
No
Is blank pedestal on
Pins 29, 32 and 35 of IC101 (17”:
25, 28, 30 of IC104)
Check IC101 (17”: IC104) and related
components.
Yes
No
Is V_FLB pulse on
Pin 17 of IC103 (17”: IC04)?
Check Q301.
Done
Yes
No
Is blank pedestal on all cathodes?
Check Pins 24, 25 and 26 of IC101
(17”: 19, 20, 21 of IC104).
Check QB02, QB03, QG02, QG03,
QR02 and QR03.
Yes
No
Check white balance adjustment.
5-2-4 Visible Retrace
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 ...