Haier HT-3718 Service Manual page 18

Normal
Check VD503-VD,
506,C511, N501, etc.
Check to see if the
collector voltage of
VD512is 24V
Normal
Check to see
if , 8v,
5v is normal
Normal
Check
N507,N508
No light and sound
Check to see if
Fuse3 is normal
Normal
Abnormal
Check the control
voltage of VD512
or CPU power
Abnormal
The failure of
horizontal unit or
N201
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 switch
rectifying tube
power unit
Normal
Change
rectifying tube
17
Abnormal
is normal
Abnormal
Check the
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