Power Supply Static Test with Light Bulb Load
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.
Check Pins 13 or 14
for 5V SBY (4.94V)
Check Pin 8
for Error Det (4.94V)
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.
Check Pin 5,6 and 7
for (+5.22V)
Check Pins 1 or 2
For 17V (17V)
P813
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.
Gnd
VS
100W
100W
Check Pins 1 or 2
for Vs voltage
P811
1 2
orPins
Check Pins 6
for Va voltage
Check Pin 16
for AC Det (4.94V)
P811
VA TP
VS TP
VA Adj
VR502
VS Adj
VR901
P813
VS
VS
n/c
Gnd
Gnd
Va
M5V
AC In
F302
2.5A/250V
POWER SUPPLY
p/n: EAY62171101
F801
4A/250V
F101
10A/250V
Hot
Ground
RL103
P701
n/c
Input: 100~240V 50/60Hz 4.8A
17V= 1A
5.1V = 3.0A
STBY5V (5V) = 1A
VS 201~207V = 1.6A
VA 55V = 2.0A
M5V (5.1V) = 2.5A
PDP Module MAX 360W
CURRENT LABEL
Check Pins 7
for M5V voltage
54
or
Pins
51
May 2011 50PV450 Plasma
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