PG-C20XE (serv.man5). Section 2 - Service Manual Text - Sharp Projector Service Manual (repair manual). Page 25

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Using the set's control switch or the remote control-
ler’s button, adjust the setting so that the flickering
be minimum.

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Adjust the setting so that the image comes to the
center of the screen.

1. Feed the countervoltage

adjustment signal. (XGA)

2. Select the following group,

sub-group and subjects.
Group : LCD2 (6050)
Sub-group: COM
Subject :

R_LCCOM (In R adjustment)
G_LCCOM (In G adjustment)
B_LCCOM (In B adjustment)
R_REVLCCOM (In R re-
verse adjustment)
G_REVLCCOM (In G re-
verse adjustment)
B_REVLCCOM (In B re-
verse adjustment)

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Adjust the AMP-BLK setting so that the gradation of
the part 

1

 (white 95% and 100%) as shown in the

figure below is barely discernible.

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Make sure that the gradation of the part 

2

 (black

0% and 5%) is also discernible.

1. Feed the green-only

SMPTE pattern signal.
(XGA)

2. Select the following

group, sub-group and
subject.
Group : Adjust PC Image
Sub-group: CXA2111R
Subject : AMP-BLK

1

2

1. Feed the 32-step gray-

scale signal. (XGA)

2. Select the following group,

sub-group and subjects.
Group : Adjust PC Image
Sub-group: CXA2111R
Subject : AMP-R-BLK

(In R adjustment)
AMP-B-BLK
(In B adjustment)

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Adjust the setting to achieve the best color tone
balance.

1. Feed the NTSC

monoscope signal.

2. Select the following

group, sub-group and
subject.
Group

: Adjust VIDEO Image

Sub-group: VPC3230
Subject : H-Position

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Make sure the setting is 52.