LG CT-25/29M60VE/VQ - Manual (Page 19)

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NO RASTER
CHECK B+
At D807 cathode
Is the voltage at
Pin 25, 54 of IC01 3.3V?
Check
Fuse of AC line
Check / Replace
Fuse , DB801
Check the Voltage
Of C804
Check the Voltage
Pin 3 of IC801
Check / Replace
IC801, IC803, IC802
Check / Replace
Fuse DB801
Check pin 24
Of IC01(H - Out)
Check Q402
Collector waveform
Check T401
& each pin voltage
Check & Replace
T402
Is the voltage at pin3,15,45
IC02 5V?
Check the
In/out of
IC855,IC851
Check the
In/out of
IC06, IC07
Check IC01
Pin1 high?
Check / Replace
IC01
Check &
Replace
IC01
Check &
Replace
Q402
Check &
Replace
T401
Check &
Replace
IC01, IC03
Check the
Voltage at
D860 or D858
cathode Check &
Replace
F853 ,F855
Normal Abnormal
Ok
254~380 V
Open
0V
No
No
Yes
No
No
No
Yes
Yes
Yes
Yes
No
No
No No
Yes