LG 37HIZ22, Руководство по обслуживанию

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Only for training and service purposes LGE Internal Use Only - 16 -
TROUBLESHOOTING
1. No power
Start check
Manufacture enterprise
meaning of a passage
1. Check the Power off condition
No
No
No
Yes
2. Check the Interface signal
condition
No
3. Check the St_by 5V signal
circuit
Yes Yes
Yes
4. Check the 5V Monitor signal
circuit
5. Check the VSC RL_ON signal
Yes
6. Check the VSC low pressure
output
Yes No
7. Check the VSC Vs_ON signal
Yes
8. Check the Vs, Va voltage
output circuit
Yes
9. Check the power board output
high tension circuit
Yes
10. Check the Z B/D Module
output circuit
Yes
Yes
No
No
No
Yes
No
11. Check the Y B/D Module
output circuit
Yes
No
Yes No No
No
Doesn’t
the screen whole
come out?
It is
identical with power
off condition?
Is the Interface
signal operated?
Doesn’t the
5V monitor signal
come out?
Doesn’t the
VSC signal RL_ON
come out?
Doesn’t the VSC
Low pressure output
come out?
Doesn’t the
Vs,Va voltage output
come out?
Doesn’t the
St-by 5V signal
come out?
Doesn’t
the VSC signal Vs-ON
come out?
When
remove,the
Y, Z B/D Module Input
connector, Power Board high
tension output voltage
drop it occurs?
When remove
the Y B/D Module
Input connector, output
voltage drop
is occurs?
When remove
the Z B/D Module
Input connector, output
voltage drop
is occurs?
Doesn’t the
low pressure output
come out?
Doesn’t the
high tension output
come out?
High tension
output Voltage drop
it occurs?