Philips 43PFT6100S/67, Руководство по обслуживанию

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5.
5. 5.
5. White
White White
White screen
screen screen
screen after
after after
after power
power power
power----off
off off
off (work
(work (work
(work normally
normally normally
normally when
when when
when power
power power
power on,
on, on,
on, but
but but
but when
when when
when power
power power
power----off
off off
off or
or or
or
no
no no
no signal
signal signal
signal input,
input, input,
input, the
the the
the screen
screen screen
screen shows
shows shows
shows a
a a
a white
white white
white screen)
screen) screen)
screen)
6. 6. 6. 6. TV TV TV TV without without without without channel channel channel channel or or or or with with with with color color color color cast cast cast cast
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 whether the lines
between main board and high
voltage board is in open-loop
or poor contact
Check relevant circuits of
high voltage board
controlled by main board
Replace poor main
chips or recopy
software
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)
Replace antenna plug
Check the antenna and its signal
source, if no problems exist, replace
tuner or control chips with the same
model
NO
YES
YES YES NO NO
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