Hisense LHD32D33EU - Power Board Troubleshooting (Non-Output)

5.3.14. Power board troubleshooting(Non output )
Non output, IR indicator light slake
Y
Check if 12V、19V(24V/32V/50V)
output normal
N
Check if FB0 Open
Y
Check the power
components
damage or not
Y
Change damaged
components
N
N
Check EMI open or L N short
N
Check if EB1 voltage
about √2Vac
Y
Y
Change short
components
Go to
check
Main
board
func on
Check the rec fier
Check if UB1 PIN5
voltage is about 15V
Y
Check if output short
N
Check if RB12,
RB13,RB14 open
N
Change UB1
Y
Change damage
resistors