Haier 21F8A - Page 18

16
Abnormal
N
ormal
1.
N
o raster and no sound
Check the fuse
Check VD503∼VD506 V513 C507
Check loading voltages of 127V 200V
Check if the connector electrode
Check if all loadin
g
resistors are normal
Check 12V
9V 5V
Check V552 or CPU
POWER control
circuit
Check D902 V902
and V901
There is breakdown i
n
horizontal circuit and N201
Check switch
powe
r
circuit
Check if rectifier diodes
breakdown
Replace the
rectifier diodes
Loading has
breakdown
Abnormal
N
ormal
Normal
Abnormal
Abnormal
N
ormal
Abnormal
Normal
Abnormal
Normal
Maintenance Service and Trouble shooting