Power Supply Static Test With Light Bulb Load - LG 50PV450 Manual

Power Supply Static Test with Light Bulb Load

Power Supply Static Test with Light Bulb Load
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.
Pins 1 or 2
VS
Gnd
Pins 4 or 5
P811
Check Pins 1 or 2
for Vs voltage
Check Pins 6
for Va voltage
Check Pins 7
for M5V voltage
Note:
To turn on the Power Supply;
1) With Main Board connected, press power.
2) Without Main Board connected SMPS will turn on automatically.
Any time AC is applied to the SMPS,
STBY 5V will be 3.47V and will be 5.14V when the set turns on.
AC_DET WILL NOT be present until set comes on, but it's not used. If AC_DET is missing to the Main
board, it will Mute the Audio.
Error line WILL NOT be present until set comes on, but it's not used.
VA TP
VS
VS
VS TP
n/c
Gnd
Gnd
F801
Va
M5V 4A/250V
POWER SUPPLY
p/n: EAY62171101
Hot
Ground
F302
2.5A/250V
RL103
AC In
Note:
Always test the SMPS under a load using the
2 light bulbs.
Abnormal operational conditions may result if not
loaded.
VS Adj CURRENT LABEL
VR901
Input: 100~240V 50/60Hz 4.8A
17V= 1A
5.1V = 3.0A
VA Adj
VR502
STBY5V (5V) = 1A
VS 201~207V = 1.6A
VA 55V = 2.0A
M5V (5.1V) = 2.5A
PDP Module MAX 360W
F101
10A/250V
P813
P701
n/c
51
P813
Check Pins 1 or 2
For 17V (17V)
Check Pin 5,6 and 7
for (+5.22V)
Check Pin 8
for Error Det (4.94V)
Check Pins 13 or 14
for 5V SBY (4.94V)
Check Pin 16
for AC Det (4.94V)
May 2011 50PV450 Plasma