Samsung K15A Service Manual page 20

5-3 Horizontal Line Appears
Abnormal
Check Whether
a horizontal line appears in
the service mode..
NG
Check/Replace
IC201.
Samsung Electronics
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Single Horizontal Line
Normal (24V)
24V-C Voltage.
Check
Waveform of IC201
Pins 22,24.
O.K
Normal
Check/Replace
IC301.
Check
Abnormal
Check
FBT Pin 2 (24V)
Oscillation.
Normal
Check R409
Open.
Open
Check/Replace
R409.
Troubleshooting
NG
Check/Replace
FBT.
5-3