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Model
PG-C20XE (serv.man5)
Pages
30
Size
887.77 KB
Type
PDF
Document
Service Manual
Brand
Device
Projector / Section 2 - Service Manual Text
File
pg-c20xe-sm5.pdf
Date

Sharp PG-C20XE (serv.man5) Service Manual ▷ View online

25
No.
Adjusting point
Adjusting conditions
Adjusting procedure
PG-C20XU
PG-C20XE
AN-Z7T
6
RGB
countervoltage
adjustment
»
Using the set's control switch or the remote control-
ler’s button, adjust the setting so that the flickering
be minimum.
»
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)
7
RGB tone
reproduction
adjustment
»
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.
»
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
8
RGB white
balance adjust-
ment
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)
»
Adjust the setting to achieve the best color tone
balance.
9
Horizontal
center adjust-
ment
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
»
Make sure the setting is 52.
26
No.
Adjusting point
Adjusting conditions
Adjusting procedure
PG-C20XU
PG-C20XE
AN-Z7T
11
Video CON-
TRAST adjust-
ment
1. Feed the NTSC 10-step
signal.
2. Select the following group,
sub-group and subject.
Group : Adjust VIDEO Image
Sub-group: VPC3230
Subject : Contrast
3. Connect the synchroscope
to TP1402.
»
First reach a setting where the color tone level 10
gets saturated. Then decrease the setting by one
point.
12
Color saturation
adjustment
1. Feed the color bar signal.
2. Select the following group,
sub-group and subject.
Group : Adjust VIDEO Image
Sub-group: VPC3230
Subject : Color
»
Make sure the setting is 128.
0-gradation
10-gradation
0.8Vp-p
10
Video BRIGHT-
NESS adjust-
ment
1. Feed the NTSC 10-step
signal.
2. Select the following group,
sub-group and subject.
Group : Adjust VIDEO Image
Sub-group: VPC3230
Subject : Bright
»
Make sure the setting is as shown below.
PG-C20XU ........ 142
PG-C20XE ........ 145
13
PSIG adjust-
ment
1. Select the following group,
sub-group and subjects.
Group : Adjust VIDEO image
Sub-group: CXA2111R
Subject : PRGLEV
SIDLEV
2. Connect the synchroscope
to TP1210.
3. Using the NTSC 10-step
input signal, make sure that
there is no vertical stripes
appearing every 12 dots. (If
white or black vertical
stripes appear, fine-adjust
the SIDLEV setting.)
PSIG
»
Make sure the setting is as shown below.
PRGLEV ........... 61
SIDLEV ............. 170
27
No.
Adjusting point
Adjusting conditions
Adjusting procedure
PG-C20XU
PG-C20XE
AN-Z7T
14
VIDEO panel
input signal
amplitude
adjustment
1. Select the following group,
sub-group and subjects.
Group : Adjust VIDEO image
Sub-group: CXA2111R
Subject :
AMP-R-Gain (In R adjustment)
AMP-R-BLK  (In R adjustment)
AMP-G-Gain (In G adjustment)
AMP-G-BLK  (In G adjustment)
AMP-B-Gain (IN B adjustment)
AMP-B-BLK (IN B adjustment)
2. Connect the synchroscope
to the following TPs.
 In R adjustment  TP1101
 In G adjustment  TP1201
 In B adjustment  TP1301
3. Feed the NTSC 10-step
signal.
1.Select AMP-R-Gain and adjust the signal amplitude
to 3.8 
±
 0.1Vp-p.
2.Select AMP-R-BLK and adjust the white-white sig-
nal amplitude to 2.1 
±
 0.1Vp-p.
3.Select AMP-G-Gain and adjust the signal amplitude
to 3.5 
±
 0.1Vp-p.
4.Select AMP-G-BLK and adjust the white-white sig-
nal amplitude to 2.6 
±
 0.1Vp-p.
5.Select AMP-B-Gain and adjust the signal amplitude
to 3.5 
±
 0.1Vp-p.
6.Select AMP-B-BLK and adjust the white-white signal
amplitude to 2.6 
±
 0.1Vp-p.
Note: Make sure that the black side does not interfere
in Gain adjustment.
2.1Vp-p(R)
3.8Vp-p(R)
15
Video white
balance adjust-
ment
1. Feed the 32-step gray-
scale signal. (VIDEO)
2. Select the following group,
sub-group and subjects.
Group : Adjust VIDEO Image
Sub-group: CXA2111R
Subject :
AMP-R-BLK (In R adjustment)
AMP-B-BLK (In B adjustment)
»
Adjust the setting to achieve the best color tone bal-
ance.
16
Automatic color
irregularity
correction
1. Apply the automatic color
correction using the auto-
matic color irregularity cor-
rection system.
»
Make sure that no remarkable uneven color remains
on the screen.
17
Color-related
performance
checking
1. Feed the color bar signal.
»
User adjustment:
Check the Color and Tint settings.
18
Video-related
performance
checking
1. Feed the monoscope pat-
tern signal.
»
User adjustment:
Check the performance relating to Contrast, Bright-
ness and Sharpness.
19
Audio-related
performance
checking
1. Feed the audio signal.
»
User adjustment:
Check the sound volume performance.
28
No.
Adjusting point
Adjusting conditions
Adjusting procedure
PG-C20XU
PG-C20XE
AN-Z7T
20
RGB-related
performance
checking
1. Feed the RGB signal.
»
User adjustment:
Check the performance relating to Contrast, Bright-
ness, Red, Blue, Clock, Phase, H-POS, and V-POS.
1. Receive the 480I signal.
»
User adjustment:
Check the performance relating to Contrast, Bright-
ness, Color, Tint and Sharpness.
21
DVD perform-
ance checking
1. Heat the thermistor with a
hair dryer.
»
Make sure that the temperature is indicated.
22
Thermistor
performance
checking
1. Feed the phase check pat-
tern signal.
»
In the VGA, SVGA, XGA, and SXGA modes, make
sure the Clock, Phase, H-Pos and V-Pos settings can
be automatically adjusted.
23
Auto sync
performance
checking
»
Make sure that the keystone distortion can be cor-
rected.
24
Keystone cor-
rection perform-
ance checking
»
Make sure that the brightness can be changed with
the user lamp power control.
25
Lamp power
changeover
performance
checking
»
Make the following settings.
Destination
Process adjustment
Remote control adjustment
(Model)
US (XU)
S4
Factory setting at 4
Europe (XE)
S4
Factory setting at 4
26
Delivery set-
tings
Page of 30
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