Read LG 37LC2R / 42LC2R (CHASSIS:LP62C) Service Manual online
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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?
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