LG 50PC5D-ZB / 50PC5D1-ZD (CHASSIS:PD73A) Service Manual ▷ View online
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2. No Power
(1) Symptom
1) Doesn’t minute discharge at module.
2) Non does not come in into the front LED.
2) Non does not come in into the front LED.
(2) Check following
Is plug in power cord?
Plug in power cord.
Yes
No
Is the Line Filter and Power
Board Cable connected?
Connect the Cable.
Yes
No
Is the Fuse(F101) on
Power Board normal?
Replace the Fuse.
Yes
No
Is the Power Board and 13P of
VSC Board Cable connected?
Connect the Cable.
Yes
No
After the cable connect is removed
to Power Board(except the CN101
connection cable), the AC voltage
marking is authorized on manual.
When ST-BY 5V is not operated,
replace Power Board.
to Power Board(except the CN101
connection cable), the AC voltage
marking is authorized on manual.
When ST-BY 5V is not operated,
replace Power Board.
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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
3) It is converted with the color where the front LED
is red from green.
(2) Check following
Is the Power Board
normal ?
Replace Power
Board.
Is output the normality Low/High
voltage except Stand-by 5V?
Yes
No
No
Is the each connector
normal?
Replace the
connector.
Replace
Y-Board.
After connecting well each connector,
the normality it operates?
Yes
No
Yes
Is the Ctrl Board
normal?
Replace
X-Board.
Is the output voltage normal after
remove P1, 2, 4, 9, 10 connector of
Ctrl-B/D?
Yes
No
Yes
Is the Y-Board
normal?
Is the output voltage
normal after remove
normal after remove
P5, P6 connector of
Y-B/D?
Is the Fuse(FS2) on Y-B/D normal?
(In case of open is replace)
Yes
No
Yes
Yes
Replace
Z-Board.
Is the Z-Board
normal?
Is the output voltage
normal after remove
normal after remove
P1 connector of Z-
B/D?
Is the Fuse (FS1, FS2) on Z-B/D
normal? (In case of open is replace)
Yes
No
Yes
Is the X- Board
normal?
Is the output voltage normal after
remove P1, 2, 3, 4, 5 connector of
X-B/D?
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
normality: Replace Right X-B/D
After remove P4, P5 output voltage
normality: Replace Left X-B/D
Yes
No
Yes
Is the
VSC Board normal?
Is the output voltage normal after
remove P900, P901?
After crisis COF of each board, check the normality operates.
If in case normality operates, correspondence COF Fail is replace the module.
If in case normality operates, correspondence COF Fail is replace the module.
After remove P900, P901 normal
operation: Replace VSC Board
operation: Replace VSC Board
Yes
No
Is the COF of X, Y, Z
normal ?
No
Yes
Yes
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Does minute discharge
At Module?
Is the LVDC cable
normal?
Is the VAVS on?
Check the PDP Module
Yes
No
YES
Yes
Reconnect the LVDS
cable in P800
No
Is the IC700(FLI8548)
Output normal?
Replace the VSC.
No
NO
Replace the Power
board
Is output the normality
Low/High voltage except
stand-by 5V?
NO
4. No Raster
(1) Symptom
1) No OSD and image occur at screen.
2) It maintains the condition where the front LED is green.
2) It maintains the condition where the front LED is green.
(2) Check following
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5. In case of occurring strange screen into specific mode
5-1. In case the OSD does not displayed
(1) Symptom
1) LED is green.
2) The minute discharged continuously becomes Accomplished from module.
2) The minute discharged continuously becomes Accomplished from module.
(2) Check following
Is the LVDS cable
normal ?
Is the VSC Board
normal?
Is the LVDS cable
connected well?
Cable inserts well.
Yes
No
No
Yes
Does the FIL8548
IC(IC700) Operates ?
Replace FIL8548
IC(IC700)
No
Is the Ctrl Board of
Module normal?
Replace Ctrl B/D.
No
No
Yes
Replace hte VSC B/D
Replace the cable.
Yes
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