Proper Video levels are
on P301 Pin 1, 3 and 5.
IC401 Pins 27 and 28
inputs are right at
each function?
2
0
. User Control Failure
Check connector Ass’y.
NO
Done.
Check and replace IC401.
Check and replace function key.
YES
2
1
. Missing Color
NO
Change the CRT.
Check signal generator and
signal cable.
NO
Refer to 2 No Charcter.
NO
Check and replace IC303
and IC304
NO
Check C341, C346 and G2 wire.
Check around FBT circuits also.
YES
YES
YES
YES
- 32 -
Proper AC voltage are
on all cathodes?
Proper DC voltage are
on all cathodes?
G2 voltage is right?
