Samsung SyncMaster 1000s Service Manual page 31

7-1-7 Abnormal H_Size
Does the IC201 Pin 5 output
duty vary with different B+ offset
DAC values?
Yes
Does the T402 Pin 8
14
waveform match #14?
Yes
Check some parts around D408.
7-1-8 Side Pin or Trap Failure
Does the IC403 Pin 24 output
16
match #16?
Yes
Check and replace IC401.
Check some parts IC401 Pin 2
and IC403 Pin 24.
7-1-9 Para. or Pin Balance Failure
Does the IC403 Pin 5 output vary
with different DAC values?
Yes
Done.
SyncMaster 1000s (CGP1607L)
Check and replace IC201, some
No
parts IC201 Pin 5,
IC403 Pin 28 and IC401 Pin 2.
No
Check and replace T402.
No
Check and replace IC403.
No
Replace IC403.
7 Troubleshooting
WAVEFORMS
3.32 V (IC403, #12)
14
CH1 P-P = 3.32 V CH1 RMS = 0.83 V
WAVEFORMS
16 1.64 V (IC403, #24)
CH1 P-P = 1.64 V CH1 RMS = 3 V
7-5