XG-P25XE (serv.man11). Electrical adjustment - Sharp Projector Service Manual (repair manual). Page 3

1. Feed the 32-step gray scale

signal (XGA 60Hz).
Group : OUTPUT 1
Subject : R1-BLK (R)

R1-GAIN(R)
B1-BLK (B)
B1-GAIN(B)

»

Adjust the R1-BLK and B1-BLK data for the black
balance on the gray scale. Then adjust the R1-
GAIN and B1-GAIN data for the center-to-white
balance on the gray scale.
(Adjust to the best point.)

1. Feed the NTSC mono-

scope pattern signal.

2. Group : VIDEO 1

Subject : NTSC-H

»

Using the control switches or the remote controller
buttons, adjust the data to have the same
overscan.

1. Feed the split color bar sig-

nal.
Group : VIDEO 1
Subject : PICTURE

2. Connect the oscilloscope

between pin TP1201and
GND.

»

Using the control switches or the remote controller
buttons, adjust the white to white (100%) level
difference to 2.2 ± 0.05 Vp-p.

1. Feed the split color bar sig-

nal.
Group : VIDEO 1
Subject : TINT

2. Connect the oscilloscope to

TP1301.

»

Using the control switches or the remote controller
buttons. Adjust the setting so that the points indi-
cated in the waveform figure are at the same level.

1. Feed the baseband (0 step

gray scale :0% Black to
100% White) signal.
Group : VIDEO 1
Subject : BRIGHT

2. Press the control switch or

the remote control’s mute
button (to set the gamma
correction to the process
setting).

»

Using the control switches or the remote controller
buttons, adjust the setting until the black signal (0%)
becomes bit-less.

2.2Vp-p

SAME LEVEL