Sharp Notevision XG-P10XU, Service Manual

Page: 28 / 122

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XG-P10XU
No. Adjusting point Adjusting conditions Adjusting procedure
7 RGB 1 system
black level
signal amplitude
(odd-numbered)
»
Choose the subject R1-GAIN and adjust the sig-
nal amplitude to 3.25 ±0.03 Vp-p using the control
switches or the remote controller buttons.
»
Next, choose the subject R-BLK and adjust the
white peak level to 2.25Vp-p ±0.02V.
1. Make the following choice:
Group : OUTPUT 1
Subject : R1-BLK
R1-GAIN
For green, choose the sub-
jects G1-BLK and G1-
GAIN.
For blue, choose the sub-
jects B1-BLK and B1-GAIN.
2. Connect the oscilloscope to
TP1101 for red.
TP1201 for green
TP1301 for blue
3.25Vp-p
2.25Vp-p
8 Offset voltage
adjustment 1. Feed the 50% gray pattern
signal.
2. Select the following subject.
Group : OUTPUT2
Subject : R-OFFSET
Select the subjects G-OFF-
SET and B-OFFSET for the
green and blue colors, re-
spectively.
3. Connect the instrument to
TP1101 and TP1104 (R).
4. Connect the instrument to
TP1201 and TP1204(G) for
green, and TP1301 and
TP1304(B) for blue.
»
Select the subject R-OFFSET. Make such adjust-
ment that the signal level at the top center
1
and
that at the bottom center
2
of the output wave-
form on the instrument screen be the same.
1
2
Before adjustment
After adjustment
»
Make the same adjustments for green and blue.
9 P SIGNAL 1. Connect the oscilloscope to
TP1102 for red.
TP1202 for green
TP1302 for blue.
2. Make the following choice:
Group : OUTPUT 2
Subject : PSIG-H
: PSIG-L
»
Adjust the PSIG waveform to the one shown below.
»
For the green and blue colors, make sure their wave-
forms are similar to that of the red color.
2.5V DC 5.0V DC
GND
PSIG
(Adjust with PSIG-L.) (Adjust with PSIG-H.)
»
Make the same adjustments for green and blue.