Item
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
CMP420V1/CMP420V2/42EDT41 (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
24
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