Document: After-sales Maintenance Service Manual No.: L32R63*VKE/L40R63*VKE/L43R63*VKE/L49R63*VKE Version: 1.0 Effective from: APRIL 4th, 2016
Page 6 of 49
5. White screen after power-off (work normally when power on, but when
power-off or no signal input, the screen shows a white screen)
6. TV without channel or with color cast
Check TV antenna plug for looseness and poor contact
If with color cast, check the setting of
color system under menu; and change
of color system to see whether it is
normal (Usually set to automatic)
Check the antenna and its signal
source, if no problems exist, replace
tuner or control chips with the same model
Replace antenna plug
NO
YES
Check whether there is change of voltage at the high voltage
board controlled by main board when power-on and power-off
Check whether the voltage change of the control
pins on the plug interface of high voltage board is
normal when power-on and power-off
Check whether the voltage of the pin on main
chip controlling the working voltage of high
voltage board is normal when power-on and
power-off
YES
NO
The circuit
related to high
voltage board is
poor
Check relevant
circuits of high voltage
board controlled by
main board
Replace poor main
chips or recopy
software
Check whether the lines
between main board and
high voltage board is in
open-loop or poor contact
YES
YES
NO
NO
L32R63_VKE,L40R63_VKE,L43R63_VKE,L49R63_VKE_CIS_Russia.indd 6
2016-04-05 오전 11:00:48
