CONFIDENTIAL
5 Troubleshooting
5-4
CF21G*
5-1-5 S Correction Failure
S1~S6 signals are right at
each frequency block?
Check S1 ~ S6 signal.
Refer to the S-corrction table page?
Check and replace
C411, C414, C415, C416, C417, C418,C419,
Q403 ~ Q407, Q408 ~ Q412, Q413, Q414.
Yes
5-1-6 H_Lin. Failure
IC201 Pin 21 voltage varies with
different H_Lin. DAC values?
IC403 Pin 7, 8 voltage varies with
different H_Lin. DAC values?
Check +12 V line.
Check some parts around IC403.
Check L403.
Yes
Yes
No
IC402 Pin 6 output duty varies with
different H_Size DAC values?
Check some parts
around IC250, IC201.
Yes
No
Check and replace IC201.
No
Replace IC201.
No
5-1-7 Invariable H_Size
D250 Cothode voltage varies with
different H_Size DAC values?
Check and replace IC250, IC201.
No
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 ...