LG 42PG3000-ZA (CHASSIS:PD83A) Service Manual ▷ View online
- 17 -
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(F801) on
Power Board normal?
Replace the Fuse.
Yes
No
Is the Power Board and 22P of
VSC Board Cable connected?
Connect the Cable.
Yes
No
After the cable connect is removed
to Power Board, authorized the AC
voltage marking on manual.
When ST-BY 5V is not operated,
replace Power Board.
to Power Board, authorized the AC
voltage marking on manual.
When ST-BY 5V is not operated,
replace Power Board.
- 18 -
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 P161, P162 connector of Ctrl-
B/D?
Yes
No
Yes
Is the Y-Board
normal?
Is the output voltage
normal after remove
normal after remove
P201 connector of
Y-B/D?
Is the Fuse(FS202) 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 after remove
P801 connect of Z-B/D normal?
Yes
No
Yes
Is the X- Board
normal?
Is the output voltage normal after
remove P211, P311 connector of
remove P211, P311 connector of
X-B/D?
After remove P311 output voltage normality:
Replace Right X-B/D
After remove P211 output voltage normality:
Replace Left X-B/D
Replace Right X-B/D
After remove P211 output voltage normality:
Replace Left X-B/D
Yes
No
Yes
Is the
VSC Board normal?
Is the output voltage normal after
remove P801?
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 P801 normal
operation: Replace VSC Board
operation: Replace VSC Board
Yes
No
Is the COF of X, Y, Z
normal ?
No
Yes
- 19 -
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 P400
No
Is the IC100(LGE7383C)
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
- 20 -
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?
Re-insert the Cable inserts.
Yes
No
No
Yes
Does the IC100
Operates ?(LGE7383C)
Replace IC100
(LGE7383C)
No
Is the Ctrl Board of
Module normal?
Replace Ctrl B/D.
No
No
Yes
Replace hte VSC B/D
Replace the cable.
Yes
Click on the first or last page to see other 42PG3000-ZA (CHASSIS:PD83A) service manuals if exist.