LG 29FS4ALX - No Raster (Continued)

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3) No Raster (2/2)
Check the in/out of
regulator(IC822,
IC823, IC824)
Check pin 73 of
IC501(H_Out)
Check the voltage of
C832
Check/ Replace Fuse
Is the voltage each
pin voltage of IC501
Check Fuse of AC line
Check/ Replace
IC501
Check T401 & each
pin voltage
Check Q401collect
waveform
Check & Replace
T402
Check the voltage
pin4 of IC810
Check/ Replace
IC810, IC802, Q830
Check Fuse and Diode of secondary
Load of SMPS trans(T801)
Check the B
+
at D829
cathode
OPEN
Check/ Replace DB801
NO
Check/ Replace Fuse and IC810
NO
OK
NO
Normal Abnormal
Check/ Replace
Q402
Check/ Replace
T401
Check/ Replace
Q401
Check Q402
collector waveform
Check/ Replace IC501
NO
OK