LG 32LC7R Service Manual page 18

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2. Protect mode
(1) Symptom
1) After lighting once it does not discharge minutely from the module.
2) The relay falls.(there is an audible "Click".)
3) The color of the front LED turns from green to red.
(2) Follow check
Start Check
Is the Power Board
normal ?
Yes
Are all
the connectors
normal?
Yes
Is the Y-Board
normal?
Yes
Is the Z-Board
normal?
Yes
Is the X- Board
normal?
No
Is the output the normal Low/High
voltage except for the Stand-by 5V?
No
After checking each connector does
is operate correctly?
Is the
No
appropriate fuse
(FS2,FS3) on the
Y-B/D?
Yes
Is appropriate
No
fuse (FS1,FS2) on
the Z-B/D?
Yes
Is the
output voltage normal
No
after removing the P100, 110,
200, 210 connector of
the X-B/D?
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No
Replace Power Board.
No
Replace the connector.
Is the output voltage
No
normal after removing the
P1 connector of the Y-B/D?
Replace the fuse.
Is the output voltage
No
normal after removing the
P1 connector of the Z-B/D?
Replace the fuse.
After removing the P100, 110 and the output
voltage is normal : Replace the Right X-B/D
After removing the P200, 210 and the output
voltage is normal : Replace the Left X-B/D
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1/12/2013
Replace the Y-Board.
Replace the Z-Board.