Haier HS-2190, Руководство по обслуживанию

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No raster and sound
Normal
abnormal
abnormal
Normal
no display charactor
inspectR501,C5
07,V503 etc.
Inspect whether the voltage 115V 180Vloaded voltage is nornal or not
Inspect whether the voltage on the
collector of V552 is 24V or not
Inspect the voltage on all
loaded resistor
Inspect
N902,V924,
V925 etc.
Inspect the voltage such as
12V,9V,B1,5V are normal or not
Inspect V552 or
CPU power control
circuit
Inspect the
power soured
circuit
Inspect whether the
rectifier is short or
not
Fault in line circuit
or N201 see
next page
Replace the
rectifier Cause of
the load
Yes
No display charactor
Display black character or not
Inspect L902 C926 C925 Inspect the circuit from
N901(22~24) to N201(14~16)
Replace the
component
normal
有
no
abnormal
yes
Inspect the circuit from V922
R915 C450 to T402(pin5) or the
circuit from V923 C921 R914 to
N402(7)
no
yes
abnormal normal
Brocken normal
Check the Fuse
No raster and sound
No
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