July 2010 LCD TV
47LE8500
42
AC Should not be applied at any time while adding jumpers or
While unplugging connectors as damage to the circuit Board
may occur.
a) When AC is applied, the SMPS “MUST” be producing
STBY 3.5V on pins 9, 10, 11 or 12 of P201.
If 3.5V Standby is not being generated, the SMPS is defective
and must be replaced. There is no need to continue with the
next test.
But, make sure AC is arriving at the connector SK101.
(b) Unplug P8000 on the Main Board to make insertion of the Jumpers easier.
Use P700 Side to insert resistors
TEST 1:
(1) Add a jumper between (3.5V STBY) pin 7, 8, 9 or 10 and Pin 1 (PWR_ON). Apply AC.
This will turn on the power supply, relays will click.
a) Check that the 24V and 12V power supplies are turned on,
• P201 (12V pins 17, 19 and 21)
• P201 (24V pins 2, 3 and 4)
• P204 and P205 (24V pins 1 through 5) to the Inverters
(2) Remove AC power
Power Supply Board Low Voltage Test 1
Power Supply Board Low Voltage Test 1
No Backlights during this test
Pin 1 is the
Brown Wire
Leandro
Palmeira
