Read Sharp XG-P25XE (serv.man11) Service Manual online
XG-P25X
28
ELECTRICAL ADJUSTMENT
Hook up a signal generator, or a DOSV or Mac personal computer to the projector in order to feed the
signals specified in the Adjusting conditions.
signals specified in the Adjusting conditions.
No.
Adjusting point
Adjusting conditions
Adjusting procedure
1
EEPROM
initialization
initialization
1. Turn on the power (make
sure the lamp lights up) and
warm up the unit for 15 min-
utes.
warm up the unit for 15 min-
utes.
»
Make the following settings:
Press S2601 to call up the process mode and
execute S2 and S4 in the SSS menu. Now the
system, with the PC board not included, is initial-
ized. Do not execute S1 because otherwise the PC
board will be initialized.
To adjust the PC board, follow the instruction in
"Adjusting the PC Interface". (See page 34)
Press S2601 to call up the process mode and
execute S2 and S4 in the SSS menu. Now the
system, with the PC board not included, is initial-
ized. Do not execute S1 because otherwise the PC
board will be initialized.
To adjust the PC board, follow the instruction in
"Adjusting the PC Interface". (See page 34)
2
R drive
1. Make the following choice.
Group : A/D
2. Feed the 100% red-only sig-
nal. Make the following
choice.
Group : A/D
Subject : R-D
choice.
Group : A/D
Subject : R-D
»
Using the control switches or the remote controller
buttons, adjust the data so that the signal be-
comes bit-less (noise).
buttons, adjust the data so that the signal be-
comes bit-less (noise).
3
B drive
1. Feed the 100% blue-only
signal. Make the following
choice.
Group : A/D
Subject : B-D
choice.
Group : A/D
Subject : B-D
»
Using the control switches or the remote controller
buttons, adjust the data so that the signal be-
comes bit-less (noise).
buttons, adjust the data so that the signal be-
comes bit-less (noise).
4
G drive
1. Feed the 100% green-only
signal. Make the following
choice.
Group : A/D
Subject : G-D
choice.
Group : A/D
Subject : G-D
»
Using the control switches or the remote controller
buttons, adjust the data so that the signal be-
comes bit-less (noise).
buttons, adjust the data so that the signal be-
comes bit-less (noise).
5
RGB 1 system
black level
signal amplitude
(odd-numbered)
black level
signal amplitude
(odd-numbered)
»
Choose the subject G1-GAIN and adjust the sig-
nal amplitude to 3.9 ±0.05 Vp-p using the control
switches or the remote controller buttons.
nal amplitude to 3.9 ±0.05 Vp-p using the control
switches or the remote controller buttons.
»
Next, choose the subject G-BLK and adjust the
white peak level to 2.0Vp-p ±0.1V.
white peak level to 2.0Vp-p ±0.1V.
1. Make the following choice:
Group : OUTPUT 1
Subject : G1-BLK
Subject : G1-BLK
G1-GAIN
For green, choose the sub-
jects R1-BLK and R1-
GAIN.
For blue, choose the sub-
jects B1-BLK and B1-GAIN.
For blue, choose the sub-
jects B1-BLK and B1-GAIN.
2. Connect the oscilloscope to
TP1101 for red.
TP1201 for green
TP1301 for blue
TP1301 for blue
»
Make the same adjustments for green and blue.
3.9Vp-p
2.0Vp-p
XG-P25X
29
7
Sample-and-
hold pulse
phase
RCK-PHASE
GCK-PHASE
BCK-PHASE
hold pulse
phase
RCK-PHASE
GCK-PHASE
BCK-PHASE
1. Feed the XGA mode 75-Hz
black signal.
2. Make the following choice:
Group : OUTPUT 3
Subject : SH-PHASE
(Have the standard level at
8.)
Fix the GCK-PHASE set-
tings all to 8.
Subject : SH-PHASE
(Have the standard level at
8.)
Fix the GCK-PHASE set-
tings all to 8.
»
Using the control switches or the remote controller
buttons, make sure that the “OUTPUT 3” charac-
ters are not blurry and there is no ghost image. If
such blur or ghost occurs, finely adjust the setting
in the range of 7~9.
buttons, make sure that the “OUTPUT 3” charac-
ters are not blurry and there is no ghost image. If
such blur or ghost occurs, finely adjust the setting
in the range of 7~9.
8
RGB counter-
voltage
adjustment
voltage
adjustment
1. Feed the black-and-red
(25%) stripe signal (XGA).
2. Make the following choice:
Group : OUTPUT 3
Subject : RC (R)
Subject : RC (R)
: BC (B)
: GC (G)
: GC (G)
»
Using the control switches or the remote controller
buttons, adjust the data in order to minimize the
flicker.
buttons, adjust the data in order to minimize the
flicker.
»
Make the same adjustment for BC (B) and 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.
and both sides of the screen. If not, readjust the
setting to have the image equal at right and left.
9
RGB gradation
regeneration
adjustment
regeneration
adjustment
1. Feed the INFO COM. gray
scale and color bar pattern.
2. Make the following choice:
Group : OUTPUT 1
Subject : G1-BLK
Subject : G1-BLK
»
Make sure that scale (white side) to No.251 and
scale (black side) to No.8 can be seen.
scale (black side) to No.8 can be seen.
»
If white scale can't be seen properly, readjust with
G1-BLK.
G1-BLK.
No.
Adjusting point
Adjusting conditions
Adjusting procedure
6
P SIGNAL
1. Connect the oscilloscope to
TP1102 for red.
2. Make the following choice:
Group : OUTPUT 2
Subject : PSIG-H
Subject : PSIG-H
: PSIG-L
»
Adjust the PSIG waveform to the one shown below.
»
For the green and blue colors, make sure their wave-
forms are similar to that of the red color.
forms are similar to that of the red color.
2.5V DC
5.0V DC
GND
PSIG
(Adjust with PSIG-L.)
(Adjust with PSIG-H.)
4
8
12
249 251
XG-P25X
30
No.
Adjusting point
Adjusting conditions
Adjusting procedure
10
RGB white
balance
balance
1. Feed the 32-step gray scale
signal (XGA 60Hz).
Group : OUTPUT 1
Subject : R1-BLK (R)
Group : OUTPUT 1
Subject : R1-BLK (R)
R1-GAIN(R)
B1-BLK (B)
B1-GAIN(B)
B1-BLK (B)
B1-GAIN(B)
»
Adjust the R1-BLK and B1-BLK data for the black
balance on the gray scale. Then adjust the R1-
GAIN and B1-GAIN data for the center-to-white
balance on the gray scale.
(Adjust to the best point.)
balance on the gray scale. Then adjust the R1-
GAIN and B1-GAIN data for the center-to-white
balance on the gray scale.
(Adjust to the best point.)
11
Horizontal
center
center
1. Feed the NTSC mono-
scope pattern signal.
2. Group : VIDEO 1
Subject : NTSC-H
»
Using the control switches or the remote controller
buttons, adjust the data to have the same
overscan.
buttons, adjust the data to have the same
overscan.
13
Video picture
adjustment
adjustment
1. Feed the split color bar sig-
nal.
Group : VIDEO 1
Subject : PICTURE
Group : VIDEO 1
Subject : PICTURE
2. Connect the oscilloscope
between pin TP1201and
GND.
GND.
»
Using the control switches or the remote controller
buttons, adjust the white to white (100%) level
difference to 2.2 ± 0.05 Vp-p.
buttons, adjust the white to white (100%) level
difference to 2.2 ± 0.05 Vp-p.
14
Tint
1. Feed the split color bar sig-
nal.
Group : VIDEO 1
Subject : TINT
Group : VIDEO 1
Subject : TINT
2. Connect the oscilloscope to
TP1301.
»
Using the control switches or the remote controller
buttons. Adjust the setting so that the points indi-
cated in the waveform figure are at the same level.
buttons. Adjust the setting so that the points indi-
cated in the waveform figure are at the same level.
12
Video
brightness
adjustment
brightness
adjustment
1. Feed the baseband (0 step
gray scale :0% Black to
100% White) signal.
Group : VIDEO 1
Subject : BRIGHT
100% White) signal.
Group : VIDEO 1
Subject : BRIGHT
2. Press the control switch or
the remote control’s mute
button (to set the gamma
correction to the process
setting).
button (to set the gamma
correction to the process
setting).
»
Using the control switches or the remote controller
buttons, adjust the setting until the black signal (0%)
becomes bit-less.
buttons, adjust the setting until the black signal (0%)
becomes bit-less.
2.2Vp-p
SAME LEVEL
XG-P25X
31
No.
Adjusting point
Adjusting conditions
Adjusting procedure
15
NTSC color
saturation level
saturation level
1. Feed the split color bar sig-
nal.
Group : VIDEO 1
Subject : N-COLOR
Group : VIDEO 1
Subject : N-COLOR
2. Connect the oscilloscope to
TP1101.
»
Using the control switches or the remote controller
buttons, adjust the difference between the 100%
white portion and the red portion to 0.25 ±0.02 Vp-p.
buttons, adjust the difference between the 100%
white portion and the red portion to 0.25 ±0.02 Vp-p.
(same as 100% white)
16
PAL color
saturation level
saturation level
1. Feed the PAL color bar sig-
nal.
Group : VIDEO 1
Subject : P-COLOR
Group : VIDEO 1
Subject : P-COLOR
2. Connect the oscilloscope to
TP1101.
»
Using the control switches or the remote controller
buttons, adjust the difference between the 100%
white portion and the red portion to 0.3 ±0.02 Vp-p.
buttons, adjust the difference between the 100%
white portion and the red portion to 0.3 ±0.02 Vp-p.
17
SECAM color
saturation level
saturation level
1. Feed the SECAM color bar
signal.
Group : VIDEO 1
Subject : S-COLOR
Group : VIDEO 1
Subject : S-COLOR
2. Connect the oscilloscope to
TP1101.
»
Using the control switches or the remote controller
buttons, adjust the data to have a level difference
of 0.3 ±0.02 Vp-p between the 100% white portion
and the red portion.
buttons, adjust the data to have a level difference
of 0.3 ±0.02 Vp-p between the 100% white portion
and the red portion.
18
Video white
balance
balance
1. Feed the NTSC mono-
scope pattern signal
Group : VIDEO 2
Subject : R1-BLK
Group : VIDEO 2
Subject : R1-BLK
B1-BLK
»
Using the control switches or the remote controller
buttons, adjust so that the entire screen looks
evenly colorless.
buttons, adjust so that the entire screen looks
evenly colorless.
19
DVD Contrast
1. Feed the color bar signal of
the 480I component signal
to the BNC G(Y) input ter-
minal.
to the BNC G(Y) input ter-
minal.
2. Select the following subject.
Group : DVD
Subject : CONTRAST
Subject : CONTRAST
»
Using the control switches or the remote controller
buttons, adjust the white to white (100%) level
difference to 2.2 ± 0.05v p-p.
buttons, adjust the white to white (100%) level
difference to 2.2 ± 0.05v p-p.
100% White Red
100% White Red
100% White Red
2.2Vp-p
