Troubleshooting - Samsung CS21S8NAS/MUR Service Manual

5. Troubleshooting

5-1 No Power
Disconnect
the Power Cord
Check
Power LED
LED OFF
Check
IC901 B+
Abnormal
Check
the voltage of
IC804
Abnormal
Check
the resistance of
FD803
Normal
Check
IC801, D801 FUSE
Samsung Electronics
LED ON
Check IC901
Pin
5 6
Abnormal
Normal
Check
Q909, Q910
Abnormal
Replace
Check
Q909,Q910
IC803
Normal
Abnormal
Replace
Check
IC902
IC803
Abnormal
Replace FD803
Normal
Check IC901
Pin 50
Abnormal
Normal
Check IC908 and
Replace IC901
Check
IC902
Normal
Check
SCL, SDA Line
Check/Replace
IC803, 805
Abnormal
Check
Normal
the voltage of
IC803, 805
Normal
Check
Abnormal
H-OUT of IC201
Pin
50
Normal
Replace
IC201
Check the
Abnormal
voltage of
IC803, 805
Normal
Check Q401 and
Horizontal Circuit
Check FBT and
B+(130V)
Troubleshooting
5-1