Continue if the 1
st
test was OK.
Leave original jumper in place.
Power Supply Board Backlights Test 2
Leave original jumper in place.
(3) Add another jumper between (STBY_3.5V)
pin 9, 10, 11 or 12 and Pin 18 (DRV_ON).
(4) Apply AC Power. Simulating a Power and
Backlight On command.
Backlights Normal:
) If
l th b kli ht
h ld t
a) If normal, the backlights should turn on.
SMPS OK, Inverter OK.
Backlights Abnormal:
a) Recheck all connections
a) Recheck all connections.
b) Confirm the
DRV_ON
line pulling up to at least 3V.
c) Check the connections to the Panel.
If the DRV On command is pulling up to 3V and the 45V is being generated
_
p
g p
g g
from C256 + leg, see the Inverter Section of the Power Supply for additional checks.
Note: If either P202 or P203 is disconnected, the backlights will come on,
The Error line will go high, then the backlights shut off in 4~6 seconds.
Pin 1 is the
Brown Wire
May 2011 LCD TV 42LV5500
46
REMOVE AC POWER:
Brown Wire
