Read Sharp PG-A20X (serv.man11) Service Manual online
No.
Adjusting point
Adjusting conditions
Adjusting procedure
25
PG-A20X
8
RGB
countervoltage
adjustment
countervoltage
adjustment
1. Using the remote controller’s button, adjust the
setting so that the flickering be minimum.
2. Adjust the setting so that the image comes to the
center of the screen.
1. Feed the counter voltage
adjustment signal. (SVGA)
2. Select the following group
and subjects.
Group : OUTPUT3
Subject : RC (R)
Group : OUTPUT3
Subject : RC (R)
GC (G)
BC (B)
BC (B)
10
RGB white
balance adjust-
ment
balance adjust-
ment
1. Feed the RGB 50% gray
signal. (SVGA)
2. Select the following group
and subjects.
Group : OUTPUT1
Subject : R1-BLK(R)
Group : OUTPUT1
Subject : R1-BLK(R)
B1-BLK(B)
1. Adjust the R1-BLK and B1-BLK(B) settings so that
the chromaticity based on CL200 becomes as
follows (8500K). x=291±5 y=320±5
follows (8500K). x=291±5 y=320±5
13
DVD white
balance
adjustment
balance
adjustment
11
sRGB adjust-
ment
ment
1. Feed the RGB 50% gray
signal. (SVGA)
2. Select the following group
and subjects.
Group : OUTPUT1
Group : OUTPUT1
Subject : S-R1-BLK
S-B1-BLK
1. Adjust the R1-BLK and B1-BLK(B) settings so that
the chromaticity based on CL200 becomes as
follows (6500K). x=313±5 y=334±5
follows (6500K). x=313±5 y=334±5
12
Video white
balance
adjustment
balance
adjustment
14
DTV white
balance
adjustment
balance
adjustment
9
Chiral phase
selection of LCD
panel
selection of LCD
panel
1. Group
: OUTPUT3
Subject : OPT-MECH
1. Adjust the GR and GL panel settings to 0 and 1,
respectively.
1. Feed the NTSC 40% gray
signal.
2. Select the following group
and subjects.
Group : VIDEO
Subject : CB-OFFSET
Group : VIDEO
Subject : CB-OFFSET
CR-OFFSET
1. Make sure the CB-OFFSET and CR-OFFSET
settings are 7.
1. Feed the 480I component
40% gray signal.
2. Select the following group
and subjects.
Group : DVD
Subject : CB-OFFSET
Group : DVD
Subject : CB-OFFSET
CR-OFFSET
1. Make sure the CB-OFFSET and CR-OFFSET
settings are 7.
1. Select the following group
and subjects.
Group : DTV
Subject : CB-OFFSET
Group : DTV
Subject : CB-OFFSET
CR-OFFSET
1. Make sure the CB-OFFSET and CR-OFFSET
settings are 7.
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