Haier 48E2500 Service Manual page 47

Service Manual
Model No.: 48E2500
1.Power Board Diagram
AC
filter
input
2.Power Board Service Guide
Go to
check
Main
Check the rectifier
board
function
EMI
Recti
fier
Flyback
converter
12V_out
Non output, IR indicator light slake
Y
Check if FB 1 Open
Check EMI Common mode
inductance(LCB1,LCB3)
open or L to N short
N Check if EB202 voltage
Check if UB101 PIN5
voltage is about 15V
Check if output short
PFC
circuit
ON/ 0FF
ADJ/PWM
Check if 12V
output normal
N
Y
N
Y
N
about √2Vac
Y
N
Y
- 46 -
Power
convertor
Feed
back
Check the power
Y
components
damage or not
Change short
components
Y
Check if RB101,
Change damage
RB102 open
N
Change
UB101
Output
filter
LED
LED CV
control circuit
Change damaged
components
resistors