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
Summary of Contents for CF21M
Page 7: ...CF21M 6 1 6 Exploded View and Parts List ...
Page 17: ...10 Schematic Diagrams 10 6 CF21M 1 368 V IC601 1 ...
Page 19: ...10 Schematic Diagrams 10 8 CF21M 19 IC103 5 24 15 CRT Socket Red Green Blue 20 R G B Video ...
Page 21: ...10 Schematic Diagrams 10 10 CF21M Memo ...
Page 22: ...Memo 9 Wiring Diagram 9 2 CF21M ...
Page 23: ...Memo 8 Block Diagrams 8 2 CF21M ...
Page 48: ...Memo 7 Electrical Parts List 7 26 CF21M ...
Page 49: ...7 Electrical Parts List CF21M 7 27 Loc No Code No Description Specification Remarks ...
