Service Modes, Error Codes, and Fault Finding
EN 10 LGE PDP5.
PSU (see figure “PSU trouble shooting“)
1. Check each unit part of PSU inside with naked eye
(capacitor, FET, IC, resistor).
2. Check fuse and switch position (on "Normal").
3. Check output voltage, which is converted from AC to DC.
4. Voltage Check (5V, Va, Vs).
When PSU protection occurred: check for short between Y-
SUS and Z-SUS board.
Figure 5-8 PSU trouble shooting
PSU Power Protection
There is a power protection when 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, switch the service switch to "auto",
disconnect the power supply connectors to the boards, to find
if the if the boards are defective or the PSU itself.
Fixed to Normal
if not same
Confirm
input voltage
Adjust
voltages
- value +value
Check fuse
Adjust
way
Vs Voltage ADJ
(Vs : About 180 ~195 V)
Va Voltage ADJ
Va : About 55 ~65 V
Multimeter Touch point
(5V, Va ,Vs according to
Module Label)
F_15590_071.eps
060705
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