Nokia 920C - Page 23

5 Troubleshooting
720C/920C 5-9
5-1-16 No Video
IC101 Pins 2, 6 and 11 (17”: IC104,
Pin 5, 8, 10) inputs are right?
IC101 Pins 29, 32 and 35
(17”: IC104, Pin 25, 28, 30) outputs
are right?
Check I
2
C bus and +12 V line.
Yes
Yes
No
Check CN101
No
IC102 Pins 4, 6 and 14 (17”: IC105,
Pin 1, 3, 5) outputs are right?
Check +12 V line.
Check and replace IC102 (17”: IC105).
Yes
No
Cathode DC levels are right?
Check +80 V line.
Check and replace IC101 and IC104
(17”: IC104).
Yes
No
G2 voltage is right?
Check G2 wire, CRT Socket board,
and FBT.
Change CRT.
Yes
Done.
No
Check signal cable and connection.