NO RASTER
CHECK +B
at D807 cathode
NormalAbnormal
Open
Check
Is the voltage at pin37
FUSE of AC line
& 12 of IC512 8V?
No
Check /replace
OK
YesCheck the in/outFuse,D801,IC801
D810,D811,D812
of IC841,IC842
Check the voltage
Check pin40
Noof C806
of IC512(H-out)
0V
No
Check &replaceCheck /replace
254~380V
IC512YesFuse,D801,IC801
Check u-COM
D810,D811,D812
Check Q402pin20 low?
Check the voltage
collector waveform
Noof pin4, IC803.
No
Check &replace
Yes
IC512
Check /replace
Check T451
Q802
& each pin voltageCheck /replace
D806,IC803
No
R807,R815
Check &replaceYes
IC512
Is the voltage at pin37
& 12 of IC512 8V? |