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Samsung K15A - 5-3 Horizontal Line Appears

Samsung K15A
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5-3 Horizontal Line Appears
Troubleshooting
Samsung Electronics 5-3
Abnormal
Normal (24V)
Abnormal
Check/Replace
IC201.
NG
Single Horizontal Line
Check
24V-C Voltage.
Check
Waveform of IC201
Pins 22,24.
Normal
O.K
Check Whether
a horizontal line appears in
the service mode..
Check/Replace
IC301.
Check
FBT Pin 2 (24V)
Oscillation.
Normal
NG
Check R409
Open.
Check/Replace
R409.
Open
Check/Replace
FBT.
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