DOWNLOAD Sharp PG-A20X (serv.man11) Service Manual ↓ Size: 46.1 KB | Pages: 8 in PDF or view online for FREE

Model
PG-A20X (serv.man11)
Pages
8
Size
46.1 KB
Type
PDF
Document
Service Manual
Brand
Device
Projector / Electrical adjustments
File
pg-a20x-sm11.pdf
Date

Sharp PG-A20X (serv.man11) Service Manual ▷ View online

23
PG-A20X
ELECTRICAL ADJUSTMENT
1
EEPROM
initialization
1. Turn on the power (with the
lamp on) and warm up the
set for 15 minutes.
»
Make the following settings.
Press S2002 to call the process mode and execute
"SS2" on SS menu.
2-1
R/G/B Bright-
ness adjustment
1. Select the following group
and subjects.
Group : AD
Subject : R-Bright
G-Bright
B-Bright
(Process GAMMA interlock)
2. Feed the XGA 16-step sig-
nal with an amplitude level
of 50% (0.35 Vp-p).
1.Watching the screen, adjust the R-, G- and B-Bright
settings so that the second tone (3% level step) on
the black side should have some pixel dropouts and
the bright color zone should become just about a half.
No.
Adjusting point
Adjusting conditions
Adjusting procedure
2-2
R/G/B Contrast
adjustment
1. Select the following group
and subjects.
Group : AD
Subject : R-Contrast
G-Contrast
B-Contrast
(Process GAMMA interlock)
2. Feed the SVGA white sig-
nal with an amplitude level
of 96% (0.67 Vp-p).
1.Watching the screen, adjust the R-, G- and B-Con-
trast settings so that because of some pixel drop-
outs, the bright color zone should become just about
a half.
3
DTV Brightness/
Contrast adjust-
ment
1. Feed a 480P component
10-step signal with 100%
amplitude.
2. Select the following group
and subjects.
Group : DTV
Subject : Bright
Contrast
(Process GAMMA interlock)
1. Check the setting value.
Contrast (White Level): 2
Bright (Black Level):
12
4
DVD Brightness/
Contrast adjust-
ment
1. Feed a 480PI component
10-step signal with 100%
amplitude.
2. Select the following group
and subjects.
Group : DVD
Subject : Bright
Contrast
(Process GAMMA interlock)
1. Check the setting value.
Contrast (White Level): 1
Bright (Black Level):
13
No.
Adjusting point
Adjusting conditions
Adjusting procedure
24
PG-A20X
5
Video Bright-
ness/Contrast
adjustment
1. Feed an NTSC composite
video 10-step signal (no
setup) with 100% ampli-
tude.
2. Select the following group
and subjects.
Group : VIDEO
Subject : Bright
Contrast
(Process GAMMA interlock)
1. Check the setting value.
Contrast (White Level): 0
Bright (Black Level):
13
6
PSIG adjust-
ment
1. Select the following group
and subjects.
Group : OUTPUT2
Subject : PSIG-H
PSIG-L
2. Check the fixed value.
PSIG-H: 90
PSIG-L: 16
PSIG
2.5V DC
5.6V DC
GND
1. Feed the XGA signal and adjust to make the follow-
ing PSIG waveform. (TP1101, TP1201 and TP1301)
Adjust with PSIG-L
Adjust with PSIG-H
7
R/G/B Black
Level Signal
Amplitude
adjustment
1. Select the following group
and subjects.
Group : OUTPUT1
Subject :
On Green adjustment
G1-BLK
G1-GAIN
On Red Adjustment
R1-BLK
R1-GAIN
On Blue Adjustment
B1-BLK
B1-GAIN
2. Make sure the process ad-
justment color bags appear
onscreen.
3. Connect a oscilloscope to
pin(2) of P1301 for the G
setting.
4. Connect the oscilloscope to
pin(1) of P1301 and pin(3)
of P1301 for the R and B
settings, respectively.
White-to-White
Amplitude
1. Select G1-GAIN. Using the set's control switch or
the remote controller's button, adjust the signal am-
plitude to 4.05 Vp-p ± 0.05 V.
2. Now select G1-BLK. Using the set's control switch
or the remote controller's button, adjust the white-
to-white level to 1.70 Vp-p ± 0.05 V.
3. Do the same for the R and B settings.
No.
Adjusting point
Adjusting conditions
Adjusting procedure
25
PG-A20X
8
RGB
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)
GC (G)
BC (B)
10
RGB white
balance adjust-
ment
1. Feed the RGB 50% gray
signal. (SVGA)
2. Select the following group
and subjects.
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
13
DVD white
balance
adjustment
11
sRGB adjust-
ment
1. Feed the RGB 50% gray
signal. (SVGA)
2. Select the following group
and subjects.
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
12
Video white
balance
adjustment
14
DTV white
balance
adjustment
9
Chiral phase
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
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
  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
  CR-OFFSET
1. Make sure the CB-OFFSET and CR-OFFSET
settings are 7.
No.
Adjusting point
Adjusting conditions
Adjusting procedure
26
PG-A20X
20
DTV Color
saturation
adjustment
1. Select the following group
and subject.
Group
: DTV
Subject : Color
1. Check the fixed value.
Color : 8
21
DVD Tint  adjust-
ment
1. Select the following group
and subject.
Group
: DVD
Subject : Tint
1. Check the fixed value.
Tint : 5
22
DVD Color
saturation
adjustment
1. Select the following group
and subject.
Group
: DVD
Subject : Color
1. Check the fixed value.
Color : 5
18
Video
sharpness
adjustment
1. SGroup: VIDEO
Subject: Sharpness
1. Check the preset value.
Sharpness: 3
19
DTV Tint
adjustment
1. Select the following group
and subject.
Group
: DTV
Subject : Tint
1. Check the fixed value.
Tint : 5
16
Video Tint
adjustment
1. Select the following group
and subject.
Group
: VIDEO
Subject : N-Tint
P-Tint
S-Tint
1. Check the fixed value.
N-Tint : 5
P-Tint : 5
S-Tint : 5
15
Automatic color
irregularity
correction
1. Apply the automatic color
correction using the auto-
matic color irregularity cor-
rection system.
1. Make sure that no remarkable uneven color remains
on the screen.
17
Video Color
saturation
adjustment
1. Select the following group
and subject.
Group
: VIDEO
Subject : N-Color
P-Color
S-Color
1. Check the fixed value.
N-Color : 5
P-Color : 5
S-Color : 5
23
Sample hold
pulse phase
checking
1. Check the fixed value.
Fixed Value : 8
1. Feed the XGA 75-Hz black
signal.
2. Select the following group
and subjects.
Group : OUTPUT3
Subject : GCK-PHASE
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Sharp PG-A20X (serv.man11) Service Manual ▷ Download

  • DOWNLOAD Sharp PG-A20X (serv.man11) Service Manual ↓ Size: 46.1 KB | Pages: 8 in PDF or view online for FREE
  • Here you can View online or download the Service Manual for the Sharp PG-A20X (serv.man11) in PDF for free, which will help you to disassemble, recover, fix and repair Sharp PG-A20X (serv.man11) Projector. Information contained in Sharp PG-A20X (serv.man11) Service Manual (repair manual) includes:
  • Disassembly, troubleshooting, maintenance, adjustment, installation and setup instructions.
  • Schematics, Circuit, Wiring and Block diagrams.
  • Printed wiring boards (PWB) and printed circuit boards (PCB).
  • Exploded View and Parts List.