Sharp LC-37D90U Service Manual page 81

Is there the PNL12V output?
Turn on the power again and make sure the set functions
as specified.
(Remarks)
PS_ON
Status of the set (CN5702(1))
MODE1 High
STDBY
MODE2 Low
PowerON High
YES
NO
YES
PNL_POW BU5V
(CN5702(4)) (CN5702(5))
High 5V
Low 5V
High 5V
Check D4705 and D4706 for defects.
Is PNL_POW (pin (4) of CN5702) at High (about 3.3V)?
Check the PNL12V series regulator
circuit.
UR6V UR10V
(CN5701(1)) (CN5701(7))
6V 10V
- -
6V 10V
6 – 2
L C - 3 7 D 9 0 U
Check the primary-side parts
for defects. See if the second-
ary output is short-circuited.
Check the main unit for trou-
ble.
UR13V PNL12V
(CN5701(11)) (CN5701(3))
13V 12V
- -
13V 12V
24V
(CN5703(1))
24V
-
24V