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
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 ...
