LCD DV 42LH90
37
February 2010
Continue if the 1
st
test was OK. Leave original resistor in place.
(3) Add another 100Ω resistor between (5V) pin 7, 8, 9 or 10 and
Pin 20 (INV On).
(4) Apply AC Power. Simulating a Power and Backlight On command.
Backlights Normal:
a) If normal, the backlights should turn on. SMPS OK, Inverter OK.
Backlights Abnormal:
a) Recheck all connections.
b) Confirm the INV On/Off line pulling up to at least 3V.
REMOVE AC POWER:
c) Check the connections to the Inverter.
If the 24V was arriving at the Inverter in Test 1 (pins 1~5 of P203) and
the Inverter On command (INV-ON pin 12 of P203) is arriving, then see
Inverter Section for further testing.
Power Supply Board Backlights Test 2
Power Supply Board Backlights Test 2
P700 Connector disconnected from the Main Board. Apply AC after adding jumper.
Use P700
Side to insert
resistors
To Next Page
Loading...
