Service manual

5 Troubleshooting
5-14 CF21M*
5-2-3 Missing Color
Proper Video levels are
on CN101 Pin 1, 3 and 5.
Proper AC voltage are
on all cathodes?
Refer to 5-1-16 No Video.
Yes
Yes
No
Check signal generator and
replace BNC Board.
No
Proper DC voltage are
on all cathodes?
Check IC105 (19”: IC102)
Pin 1, 3 and 5.
Check and replace IC105
(19”: IC102) and IC104 (19”: IC104).
Change the CRT.
Done.
Yes
No
G2 voltage is right?
Check D598, D599 and G2 wire.
Check around FBT circuits also.
Yes
No