Samsung CF21M Service Manual page 53

5 Troubleshooting
5-1-5 S Correction Failure
Check S1 ~ S5 signal.
Refer to the S-corrction table page?
S1~S5 signals are right at
each frequency block?
Yes
Check and replace
C411, C413, C414, C415, C416,
C417, C418, Q403 ~ Q407, Q408 ~ Q412
5-1-6 H_Lin. Failure
IC201 Pin 3 voltage varies with
different H_Lin. DAC values?
Yes
IC403 Pin 7, 8 voltage varies with
different H_Lin. DAC values?
Yes
Check L403.
5-1-7 Invariable H_Size
D250 Cothode voltage varies with
different H_Size DAC values?
Yes
IC402 Pin 6 output duty varies with
different H_Size DAC values?
5-4
No
Check and replace IC201.
No
Replace IC201.
No
Check +12 V line.
Check some parts around IC403.
No
Check and replace IC250, IC201.
No
Check some parts
around IC250, IC201.
CF21M*