Nokia 920C Service Manual page 29

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