Samsung SyncMaster 1000s Service Manual page 34

7 Troubleshooting
7-1-14 ABL Failure
Input full white pattern to monitor.
Does the IC104 Pin 15 input
vary with different patterns?
(Crosshatch)
No
Check CN101 Pin 23 and
CN221 Pin 23.
Is the T502 Pin 8 waveform
46
correct?
Yes
Does the IC221 Pin 23 output
level vary with different pattern?
(Crosshatch)
Yes
Check and replace Q201,
Q202 and +12 V line.
7-8
Yes
Check and replace IC104.
No
Check and replace T502.
No
Check and replace IC201.
WAVEFORMS
46 3.62 V (T502, #8)
CH1 P-P = 3.62 V CH1 RMS = 3.330 V
SyncMaster 1000s (CGP1607L)