Troubleshooting - Haier HT-3718 Service Manual

4.TROUBLESHOOTING

1.
Check VD503∼VD506
Normal
Check if the connector electrode
voltage of V552 is 26V.
Normal
Check 12V
9V 5V
Normal
Check D902
V902 and
V901
No raster and no sound
Check the fuse
Normal
V513 C507
Abnormal
Check V552 or
CPU POWER
control circuit
Abnormal
There is breakdown in
horizontal circuit and
N201
Abnormal
Check loading voltages of 112V 150V
Check if all loading resistors are normal
Normal
Check switch
power circuit
Normal
Replace
rectifier diodes
34
Abnormal
Abnormal
Check if rectifier
diodes breakdown
Loading
the
breakdown
Abnormal
has