Service manual

5 Troubleshooting
CF21M* 5-11
5-1-19 OSD Failure
IC103 (19”: IC03) Pin 6 and 17
waveforms are right?
Is there 5V on IC103 Pin 5 and 24?
IC102 Pins 1, 2 and 3, 4 (19”: IC101
Pins 1, 4 and 9, 13) input is right?
Check and replace IC103 (19”:IC103).
Yes
Yes
No
Check and replace
Q104, IC201 Pin 20.
Check 5V Line.
No
Does the Voltage Change on
IC201 Pins 11, 12 When you
push the control Button?
Check CN204 and Assy.
Yes
No
Check IC201.
Done.
Check CN102 and connector Ass’y.
18 19
WAVEFORMS
18
IC103, #6, 17
19
IC103, #5, 24