LG 37LC4R Manual De Servicio página 20

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2. Protect mode
(1) Symptom
1) After once shining, it does not discharge minutely from module.
2) The relay falls.(The sound is audible "Click".)
3) It is converted with the color where the front LED is red from green.
(2) Check following
Is the Power Board
normal ?
Yes
Is the each
connector normal?
Yes
Is the Y-Board
normal?
Yes
Is the Z-Board
normal?
Yes
Is the X- Board
normal?
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Only for training and service purposes
(PDP Only)
No
Is output the normality Low/High
voltage except Stand-by 5V?
No
After connecting well each connector,
the normality it operates?
Is the fuse
No
(FS2,FS3) on Y-B/D
normal?
FS101,
FS102
Is the fuse
No
(FS1,FS2) on Z-B/D
normal?
Is the
output voltage
No
normal after remove P1, 2,
3, 4, 5 connector of
X-B/D?
Is the output voltage
No
normal after remove P1
connector of Y-B/D?
Yes
Replace the fuse.
Is the output voltage
No
normal after remove P1
connector of Z-B/D?
Yes
Replace the fuse.
- 20 -
No
Replace Power Board.
No
Replace the connector.
After remove P1, P2, P3 output voltage
normality: Replace Right X-B/D
After remove P4, P5 output voltage
normality: Replace Left X-B/D
Replace Y-Board.
Replace Z-Board.
LGE Internal Use Only

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