![Nokia 720C Скачать руководство пользователя страница 28](http://html.mh-extra.com/html/nokia/720c/720c_service-manual_255017028.webp)
5 Troubleshooting
5-14
720C/920C
5-2-3 Missing Color
Are proper Video levels
on CN101 (D-Sub) Pins 1, 2 and 3
?
Are proper AC voltage on all
cathodes?
Refer to 5-1-16 No Video.
Yes
Yes
No
Check signal generator and cathode.
No
Are proper DC voltage on all
cathodes?
Check IC104 (17”: IC104 Pins 19, 20,
and 21) Pins 10, 11 and 12.
Check QB02, QB03, QG02, QG03
QR02 and QR03.
Change the CRT.
Done
Yes
No
Is G2 voltage right?
Check G2 wire, G2 control, volume
and FBT.
Yes
No
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 ...