LCD DV August 2008 32LG40
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Power Supply Board Test (1) All Board Disconnected
Power Supply Board Test (1) All Board Disconnected
The Power Supply “MUST” be producing STAND-BY +5V before proceeding.
P201 Connector disconnected from the Main Board
AC: Not applied when adding jumper. Applied when making test.
With Power Supply disconnected from other Boards and AC applied, confirm
that the Power Supply is producing 5V from either Pins 9, 10, 11 or 12. If
not, check fuse. If fuse OK and no 5V, replace Power Supply. If 5V OK
then continue.
1st short either pin 9, 10, 11 or 12 (5V) to Pin 19 (PWR) using a 10K
resistor.
This turns on the power supply.
Confirm that the other low voltage power supplies are activated.
Pins 1 and 2 (16V)
Pins 5 and 6 (12V)
Pin 18 (AC Detect) goes high
Fuse F101 Check for 350V (Ballast Voltage)
If any voltage missing, replace Power Supply.
+5V
