Service Manual
Model No.: 48E2500
- 48 -
5ǃPower Supply Trouble
Check Pin2 of CNB2 for 12V
Check if the power
board is OK?
N
N
N
Check power on the TV board.
Repair the power board.
Check U2 for 5V_STB , UL1 for
3V3_STB and UD1 for 1.15V_STB
Y
Y
Y
Repair the abnormal circuit :
1.5V_STB—check U2
2. 3V3_STB—check UL1
3.1.15V_STB–- check UD1
and peripheral components
N
Power on , check CM32 for
5V_M,UL2 for 1.8V_DDR
Y
Repair the abnormal circuit :
1. 5V_M—check power supply ,and
QM32 circuit
2. 1V8_DDR–- check UL2
OK
6ǃDisplay Trouble˄blurred screen˅
blurred screen
Check if the cable is correct
and connected tightly
Check if the panel is OK
Change the cable
for panel
Y
N
Change panel
N
Y
Check if the output circuit from
U1(MSD3393)
to the jack is normal
Y
N
Software error or
U1(MSD3393) damage
Repair this circuit
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