Sharp XG-C40XU Serviceanleitung Seite 5

No. Adjusting point
8 P SIGNAL
9 Sample and
hold pulse
phase checking
10 RGB counter-
voltage
adjustment
11 RGB gradation
regeneration
adjustment
12 RGB white
balance
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Adjusting conditions
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
3. Using the horizontal 10-step
signal, make sure no vertical
stripes appear every 12 dots.
(If any white or black vertical
stripes appear, finely adjust
the PSIG-L setting.)
1. Feed the XGA-mode 75-Hz
black signal.
2. Select the following group
and subjects.
Group : OUTPUT3
Subject: SH-PHASE,
GCK-PHASE
1. Feed the black-and-red
(25%) stripe signal (XGA).
2. Make the following choice:
Group : OUTPUT 3
Subject : RC (R)
1. Feed the green-only SMPTE
pattern signal (XGA).
Group : OUTPUT 1
Subject : G1-BLK
1. Feed the 32-step gray scale
signal (XGA).
Group : OUTPUT 1
Subject : R1-BLK (R)
B1-BLK (B)
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Adjusting procedure
» Adjust the PSIG waveform as shown below.
(With XGA signal input)
Adjust the PSIG-H setting.
2.3V 0.1V
GND
» Make sure that the (G) and (B) waveforms are similar
to that of (R).
» Make sure that the SH-PHASE and GCK-PHASE
settings are 11 and 6, respectively.
» Using the control switches or the remote controller
buttons, adjust the data in order to minimize the
flicker.
» Make the same adjustment for BC (B), GC (G).
» See if the image is equally adjusted at the center
and both sides of the screen. If not, readjust the
setting to have the image equal at right and left.
» Adjust the G-BLK data until the gradation of the
portion 1 (95% and 100% white) shown below
can be slightly recognized. Make sure also that the
gradation of the portion 2 (0% and 5% black) is
visible.
2
» Choose the subjects R1-BLK and B1-BLK and
adjust the black balance of the gradation.
5
XG-C40XU 1
(
XG-C40XE ( 1
Adjust the PSIG-L setting.
3.7V 0.1V
1
)
)