Haier 32E2000, Service Manual

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Service Manual
Model No.: 32E2000
10-2-3 LED driver Trouble
10-2-4 DC/DC Power Supply Trouble
Correct
the LED
cable
Check PWM_DIM&PWM_REF&
BL_ON Control signal
Check
Main
board
function
Change
QB801/DB801
Check if LED
output
short/open
IR indicator light
up but backlight slake
Check if LED output cable
is connect correction
Check QB801/DB801
damage or not
Remove
short/open
status
Change
UB801/UB802
Y
N
Y
Y
Y
Y
Y
N
N
N
Increase
brightness/check
if Sampling
resistor is right
Y
check is part of
the brightness is
in dim status
check is all of
the brightness is
in dim status
Check if UB801/UB802
PIN1 voltage is about 12V
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