Troubleshooting - Samsung CXJ1331/TUCX Service Manual

6. Troubleshooting

6-1 No Power (No Raster, No Sound, Power Led Off)
Abnormal
Check the
voltages of C804
(140~150V)
Normal
Is IC801 Pin 3
(15 ~ 20V)
Normal
Check/Replace
F801
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the voltage of
C814 (125V)
Abnormal
Check D801, D802
D803, D804, F801, IC801
Abnormal
Check PC802
Check
Abnormal
Check the secondary
terminal short/open
of trans
Abnormal
Abnormal
Check/Replace
IC901
Abnormal
Check/Replace
IC902
Abnormal
Check/Replace
Q804
Troubleshooting
Normal
Check
secondary power line voltage
(5V, 6V,16.5V)
Normal
Check the voltage
of IC901 pin 34
(normal : 5V)
Normal
Check the H-Sync of
pin 26 and the V-Sync of
pin 27
Normal
Check
IC901 Pin 17 (High
when power On)
Normal
Check the voltage of
Q804 coil pin
Normal
Check the voltage
of tuner
6-1