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Power Unit Vs, Va Adjustment
Adjustment Preparations
(1)
Turn on the set and perform
pre-heat run more than 1
min with burn-in screen.
(2)
Receive full back pattern
signal
(or Video silence signal;
it will be automatically
turned off after a few
seconds by power save
function.)
(3)
Connect voltmeter leads
to Vs (or Va) and GND
test points of the power unit.
Power unit for WVGA
42PMA300EZ (PW1A)
Adjustment Procedures
(1)
Turn Vs ADJ to adjust Vs voltage
to be within ±0.1V of the value
specified in the label on the panel.
(2)
Turn Va ADJ to adjust Va voltage
to be within ±0.2V of the value
specified in the label on the panel.
(3)
Reconfirm that Vs voltage remains
within ±0.1V of the specified value.
Readjust if it' s outside of the margin.
Label example
<LOT>N6
Vs= 185.0V
Va=65.0V
18
Adj. point
Refer the figure below
Remarks
Permissive level of voltage in
sufficient time of heat-run
performed is:
Vs: within±0.45V
Va: within±0.55V
Label position (Reference)
Upper right
If it' s hard to read the
voltage value because of the
wiring,
highlight it in advance to be
visible.
Va ADJ
Va
GND
Vs
Vs ADJ
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