CONFIDENTIAL
5 Troubleshooting
5-6
CF21G*
5-1-11 Tilt Failure
IC201 Pin 19 output duty varies
with different DAC values?
IC403 Pin 10, 11 output varies with
different DAC values?
Check and replace IC403.
Check and replace CRT.
Yes
Yes
No
Check and replace IC201.
No
Check tilt connector connection
5-1-12 V Deflection Failure
Is 14V at IC301 Pin 2?
Is -14V at IS301 Pin 5?
IC250 Pin 23 output exists?
The waveform is right?
Check and replace IC250.
Yes
Yes
No
Check and replace R312, R316.
Refer to 5-1-1 No Power supply.
No
IC301 Pin 6 output exists?
The waveform is right?
Check and replace some
parts around IC301.
Yes
No
Check V DY connector connection.
10
11
WAVEFORMS
10
IC250, #23
11
IC301, #6
Summary of Contents for CF21G Series
Page 32: ...CONFIDENTIAL CF21G 6 1 6 Exploded View and Parts List ...
Page 33: ...Memo 6 Exploded View Parts List 6 2 CF21G CONFIDENTIAL ...
Page 61: ...CONFIDENTIAL Memo 8 Block Diagrams 8 2 CF21G ...
Page 63: ...Memo 9 Wiring Diagram 9 2 CF21G CONFIDENTIAL ...
Page 65: ...CONFIDENTIAL 10 Schematic Diagrams 10 2 CF21G 1 368 V IC601 1 ...