Haier HTX21S31 Service Manual page 18

Normal
Check VD501, C507,
V513, etc.
Check to see if the
collector voltage of V552
Normal
Check to see
if , 12v,
5v is normal
Normal
Check N101
ect
No lig
Check to see if
Fuse3 is normal
Normal
is 0V
Abnormal
Check the control
voltage of V552 or
CPU power
Abnormal
The failure of
horizontal unit or
N551 N552
Maintenance Service and Trouble shooting
Abnormal
Check to see 110V 180V
etc. voltage is normal
Abnormal
T est to see all terminal
Resistance of load
Is normal
Normal
Check to see if
Check
rectifying tube
power unit
Normal
Change
rectifying tube
17
Abnormal
is normal
Abnormal
Check the
Loader