LG 42PG6000 Service Manual page 14

3. Protect Mode
(1) Symptom
1) After once shining, it does not discharge minutely
from module.
2) The Rely 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?
Yes
Is the Ctrl Board
normal?
Yes
Is the
VSC Board normal?
Yes
Is the COF of X, Y, Z
normal ?
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No
Is output the normality Low/High
voltage except Stand-by 5V?
No
After connecting well each connector,
the normality it operates?
No
Is the Fuse(FS201) on Y-B/D
normal?(In case of open is replace)
No
Is the Fuse (FS1) on Z-B/D normal?
(In case of open is replace)
Is the output voltage normal after
No
remove P242 connector of
X-B/D?
No
Is the output voltage normal after
remove P163 connector of Ctrl-B/D?
No
Is the output voltage normal after
remove P1001 of VSC Board?
No
After crisis COF of each board, check the normality operates.
If in case normality operates, correspondence COF Fail is replace the module.
No
Replace Power
Yes
Is the output voltage
Yes
normal after remove
Is the output voltage
Yes
normal after remove
After remove P211 output voltage normality:
Yes
Replace Right X-B/D
After remove P23 output voltage normality:
Replace Left X-B/D
Yes
Yes
- 14 -
Board.
Replace the
connector.
Yes
P209 connector of
Y-B/D?
Yes
P3 connector of Z-
B/D?
Replace
X-Board.
After remove P1001 normal operation:
Replace VSC Board
LGE Internal Use Only
Replace
Y-Board.
Replace
Z-Board.