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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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Only for training and service purposes
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(FS101,FS102) on Y-B/D
normal?(In case of open is replace)
No
Is the Fuse (FS1, FS2) on Z-B/D
normal? (In case of open is replace)
Is the output voltage normal after
No
remove P1, 2, 3, 4, 5 connector of
X-B/D?
Is the output voltage normal after
No
remove P1, 2, 4, 9, 10 connector of
Ctrl-B/D?
No
Is the output voltage normal after
remove P901?
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 P1, P2, P3 output voltage
Yes
normality: Replace Right X-B/D
After remove P4, P5 output voltage
normality: Replace Left X-B/D
Yes
Yes
- 16 -
Board.
Replace the
connector.
Yes
P103 connector of
Y-B/D?
Yes
P1 connector of Z-
B/D?
Replace
X-Board.
After remove P901 normal
operation: Replace VSC Board
LGE Internal Use Only
Replace
Y-Board.
Replace
Z-Board.
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