LG RT-29FA35RB, Service Manual, Page: 13 / 33

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NO RASTER
CHECK B+
At D829 cathode
Is the voltage at
each pin voltage of IC11
Check
Fuse of AC line
Check / Replace
Fuse
Check the Voltage
Of C803
Check the Voltage
Pin 4 of IC801
Check / Replace
IC801, IC802, IC826
Check / Replace
DB801
Check pin 60
Of IC11(H - Out)
Check Q402
Collector waveform
Check T401
& each pin voltage
Check Q401
Collector waveform
Check the
In/out of
regulator
Check Fuse and Rectifition Diode of
secondary Load of SMPS trans(T803)
Check / Replace
IC11
Check &
Replace
IC11
Check &
Replace
Q402
Check &
Replace
T401
Normal
Abnormal
Ok
140 ~ 310V
Open
No
No
No
No
No
Yes
Yes
Yes
Yes
(IC821, IC822
IC823, IC824
IC825)
Ok
18 ~ 20V Ok
Check / Replace
Fuse IC801
Ok
Check & Replace
T402
Yes
Check &
Replace
Q401
No
No
No