Hitachi 42PD9700C, Service Manual

Page: 33 / 96

32
42PD9700C/U & 55PD9700C/U
Item Power Unit Vs, Va Adjustment
Preparation Procedure
(1) Turn on the set and perform
pre-heat run more than 1 min
on burn-in screen.
(1) Turn Vs ADJ to adjust Vs voltage
to be within ±0.1V of the value
specified in the label on the panel.
Adjust within ± 1V at Vs1
Adjust within ± 0.1V at Vs2
(2) Receive full back pattern signal
(or Video silence signal;
but it will be automatically turned off
after a few seconds by power save function.)
(2) Turn Va ADJ to adjust Va voltage
to be within ±0.2V of the value specified
in the label on the panel.
Adjust within ± 1V at Va1
Adjust within ± 0.2V at Va2
(3) Connect voltmeter leads to Vs
(or Va) and GND test points of the power unit.
(3)
Label example
<LOT>N6
Vs= 80.0V Va=60.0V
Vw=140.0V Vx=60.0V
Pow e r
Supply
Unit
X-sus
Y-sus
(Rear View)
Panel Module
Label
Reconfirm that Vs voltage remains within
±0.1V of the specified value.
Readjust if it’s outside of the margin.
n i P t s e T a V / s V 9 9 N C
s V
a V
D N G
5Q 1 4 7 F P M a t a r u M
* * * * * * * * N / S
MADE IN THAILAND
R V t n e m t s u j d a e s r a o c s V : 1 s V
R V t n e m t s u j d a e n i f s V : 2 s V
R V t n e m t s u j d a e n i f a V : 2 a V
R V t n e m t s u j d a e s r a o c a V : 1 a V