Service Modes, Error Codes, and Fault Finding
EN 14
LGE PDP 2K6
5.
PSU (see figure “PSU trouble shooting“)
1.
Check each unit part of PSU inside with naked eye
(capacitor, FET, IC, resistor).
2.
Check fuse.
3.
Check output voltage, which is converted from AC to DC.
4.
Voltage Check (5V, Va, Vs).
When PSU protection occurred: check for a short circuit
between the Y-SUS and the Z-SUS board.
Figure 5-8 PSU trouble shooting
PSU Power Protection
When the power protection gets active, the power is switched
"OFF" automatically within 2-3 min. from power "ON".
The power protection function protects the boards when a short
occurs on circuits of the PDP module, or when a power problem
occurs. If there is no power, even after replacing the PSU, find
out where the short occurred.
In case of a PSU protection, the red LED will be "ON" and an
error code will be displayed via the green blinking LED (see
also paragraph "Detailed PSU Trouble Shooting", further on).
In case of a PSU protection, disconnect the power supply
connectors to the boards, to find if the boards are defective or
the PSU itself.
if not the same
Confirm
input voltages
Adjust
voltages
- value +value
Check fuse
Way to
adjust
Vs Voltage ADJ (VR551)
(Vs : range 180 ~195 V)
Va Voltage ADJ (VR351)
(Va : range 55 ~ 65 V)
G_16391_007.eps
030707
Multimeter Test point
(5V, Va ,Vs according to
Module Label)
