LG 42PW350 - 42 PW350 Power Supply Static Test with Light Bulb Load; Static Test with Load Procedure

42PW350 Power Supply Static Test with Light Bulb Load
Note:
Always test the SMPS under a load using the
2 light bulbs.
Abnormal operational conditions may result if not
loaded.
Any time AC is applied to the SMPS, STBY 5V will be 3.46V and will be 5.14V when the set turns on.
AC DET WILL NOT be present until set comes on, if missing it will mute the audio.
Error line WILL NOT be present until set comes on, but it’s not used.
P813
67
Using two 100 Watt light bulbs, attach one end to Vs and the other end to ground. Apply AC to SC101. If the light bulbs
turn on and VS is the correct voltage, allow the SMPS to run for several minutes to be sure it will operate under load.
If this test is successful and all other voltages are generated, you can be fairly assured the power supply is OK.
Note: To be 100% sure, you would need to read the current handling capabilities of each power supply listed on the silk
screen on the SMPS and place each supply voltage under the appropriate load.
Note:
To turn on the Power Supply;
1) With Main Board connected, press power.
2) Without Main Board connected SMPS will turn on automatically.
Check Pins 1 or 2
for Vs voltage
P811
Check Pins 5
for Va voltage
June 2011 42PW350 Plasma
CURRENT LABEL
Check Pins 6
for M5V voltage
VS TP
F302
2.5A/250V
STBY 160V
RUN 390V
P811
P813
VA TP
F101
10A/250V
VR901
VS Adj
SMPS
P/N: EAY62170901
P702
SC101
RL103
T901
L601
L602
VS
Supply
VA
Supply
5V
Supply
17V
Supply
F301
4A/250V
STBY 160V
RUN 390V
VR502
VA Adj
Gnd
VS
100W
100W
12
or Pins
P811
Check Pins 13 or 14
for 5V SBY (5.22V)
Check Pin 8
for Error Det (4.95V)
Check Pin 5,6 and 7
for (+5.22V)
Check Pins 1 or 2
For 17V (17V)
Check Pin 16
for AC Det (4.96V)
INPUT: 100~240V ~ 50/60Hz 3.2A
17V: 17V = 1.0A
5.1V: 5.1V = 3.0A
STBY5V: 5V = 1.0A
VS: 199-203V = 1.3A
VA: 55V = 1.5A
M5V: 5.1V = 2.5A
PDP Module Max: 210W
XP5 42T3
LG Electronics