Nokia 920C Service Manual page 28

5 Troubleshooting
5-2-3 Missing Color
Are proper Video levels
on CN101 (D-Sub) Pins 1, 2 and 3?
Yes
Are proper AC voltage on all
cathodes?
Yes
Are proper DC voltage on all
cathodes?
Yes
Is G2 voltage right?
Yes
Change the CRT.
Done
5-14
No
Check signal generator and cathode.
No
Refer to 5-1-16 No Video.
Check IC104 (17": IC104 Pins 19, 20,
No
and 21) Pins 10, 11 and 12.
Check QB02, QB03, QG02, QG03
QR02 and QR03.
No
Check G2 wire, G2 control, volume
and FBT.
720C/920C