Power Troubleshooting - Haier 48E2500 Service Manual

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