Troubleshooting - LG 32HIZ22 Service Manual

1. No power
Start check
No
Doesn't
the screen whole
Yes
come out?
No
Doesn't the
low pressure output
Yes
come out?
No
Doesn't the
high tension output
Yes
come out?
No
High tension
output Voltage drop
it occurs?
Yes
No
Manufacture enterprise
meaning of a passage

TROUBLESHOOTING

It is
identical with power
off condition?
Yes
1. Check the Power off condition
Doesn't the
St-by 5V signal
come out?
Yes
3. Check the St_by 5V signal
circuit
Doesn't
the VSC signal Vs-ON
come out?
Yes
7. Check the VSC Vs_ON signal
When
remove,the
Y, Z B/D Module Input
connector, Power Board high
tension output voltage
drop it occurs?
Yes
9. Check the power board output
high tension circuit
Is the Interface
signal operated?
No
No
2. Check the Interface signal
condition
Doesn't the
5V monitor signal
No
come out?
Yes
4. Check the 5V Monitor signal
circuit
Doesn't the
Vs,Va voltage output
No
come out?
Yes
8. Check the Vs, Va voltage
output circuit
When remove
the Y B/D Module
Input connector, output
No voltage drop
is occurs?
10. Check the Z B/D Module
output circuit
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6. Check the VSC low pressure
output
Yes
Doesn't the VSC
Low pressure output
come out?
No
Doesn't the
VSC signal RL_ON
No
come out?
Yes
5. Check the VSC RL_ON signal
the Z B/D Module
Input connector, output
No
Yes
11. Check the Y B/D Module
output circuit
When remove
voltage drop
is occurs?
Yes