Sharp LC-37D90U - Page 81

LC-37D90U
6 – 2
(Remarks)
Check D4705 and D4706 for defects. Check the primary-side parts
for defects. See if the second-
ary output is short-circuited.
YES
Is there the PNL12V output?
NO
Is PNL_POW (pin (4) of CN5702) at High (about 3.3V)?
YES
Check the PNL12V series regulator
circuit.
Check the main unit for trou-
ble.
Turn on the power again and make sure the set functions
as specified.
Status of the set
PS_ON
(CN5702(1))
PNL_POW
(CN5702(4))
BU5V
(CN5702(5))
UR6V
(CN5701(1))
UR10V
(CN5701(7))
UR13V
(CN5701(11))
PNL12V
(CN5701(3))
24V
(CN5703(1))
STDBY
MODE1 High High 5V 6V 10V 13V 12V 24V
MODE2 Low Low 5V - - - - -
PowerON High High 5V 6V 10V 13V 12V 24V