Service manual

10
P50T01U/E P50TP01U/E P42T01U/E P42TP01U/E
Item Power Unit Vs, Va Adjustment
Preparation Procedure
(1) Turn on the set and perform
pre-heat run for more than 1 min
on burn-in screen.
(1) Turn Vs ADJ to adjust Vs voltage
to 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) Turn Va ADJ to adjust Vs voltage
to within ±0.1V of the value
specified in the label on the panel.
Adjust within ±1V at Va1
Adjust within ±0.1V at Va2
(2) Receive full back pattern signal.
(or Video silence signal; it will
automatically turn off after a few seconds
by the power save function)
(3) Reconfi rm that Vs voltage remains within
±0.45V of the specifi ed value.
Readjust if outside of the margin.
(3) Connect voltmeter leads to the Vs (or Va) and
GND test points of the power unit.
(4) Reconfi rm that Va voltage remains within
±0.55V of the specifi ed value.
Readjust if outside of the margin.
1
2
1
2
Label example
<LOT>N6
Vs=80.0V Va=60.0V
Vw=140.0V Vx=60.0V
Vs1: Vs coarse
adjustment VR
Vs2: Vs fine
adjustment VR
Va1: Va coarse
adjustment VR
Va2: Va fine
adjustment VR
CN99: Vs,Va test points
GND
Vs
Va
3
2
1
50PDP Vs and Va Adjustment
Caution: 42PDP does not require adjustment. ( 42PDP is self-adjustmenting.)