Sharp XG-XV2E (serv.man2) Service Manual ▷ View online
21
XG-XV2E/M/A
VOLTAGE MEASUREMENT
Measuring procedure: PC I/F Unit (CPCi-0023CE03)
1. Feed the XGA pattern signal from the signal generator.
2. Using the tester, measure the voltage at each test point on the PC I/F PWB.
2. Using the tester, measure the voltage at each test point on the PC I/F PWB.
Tester
XGA pattern signal input
Signal generator
Projector
PC I/F PWB
22
XG-XV2E/M/A
ELECTRICAL ADJUSTMENT
No.
Adjusting point
Adjusting conditions
Adjusting procedure
1
EEPROM in
initialization
(Note)
initialization
(Note)
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 S5001 to call up the process mode and ex-
ecute S2 in the SSS menu. Now the system, with the
PC board not included, is initialized. In order to make
the PC board adjustments (Nos. 2, 3 and 4), execute
S1. If not making those PC board adjustments, do
not execute S1.
Press S5001 to call up the process mode and ex-
ecute S2 in the SSS menu. Now the system, with the
PC board not included, is initialized. In order to make
the PC board adjustments (Nos. 2, 3 and 4), execute
S1. If not making those PC board adjustments, do
not execute S1.
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.
Note : All the adjusted data will be cleared by making the "FACTORY SETTING 1" or "FACTORY SETTING 2".
Before using the previous data for adjustment, write down the modified data on a notepad or the like and
then make the initialsettings.
then make the initialsettings.
3
R drive
1. Make sure that the group
and subject are as follows
and that the GAIN setting is
163.
Group : A/D
Subject : GAIN
and that the GAIN setting is
163.
Group : A/D
Subject : GAIN
2. Feed the 100% red-only sig-
nal.
3. Make the following choice:
Group : A/D
Subject : R-D
Subject : R-D
»
Using the membrane switch or the remote control
button, make such adjustment that the noise becomes
bit-less.
button, make such adjustment that the noise becomes
bit-less.
4
B drive
1. Feed the 100% blue-only
signal.
2. Make the following choice:
Group : A/D
Subject : B-D
Subject : B-D
»
Using the membrane switch or the remote control
button, make such adjustment that the noise becomes
bit-less.
button, make such adjustment that the noise becomes
bit-less.
5
G drive
1. Feed the 100% green-only
signal.
2. Make the following choice:
Group : A/D
Subject : G-D
Subject : G-D
»
Using the membrane switch ot the remote control
button, make such adjustment that the noise becomes
bit-less.
button, make such adjustment that the noise becomes
bit-less.
2
Color imbalance
correction OFF
correction OFF
1. S4202
»
Set S4202 to the OFF position.
23
XG-XV2E/M/A
No.
Adjusting point
Adjusting conditions
Adjusting procedure
7
RGB 2 system
black level
signal amplitude
black level
signal amplitude
1. Make the following choice:
Group : OUTPUT 2
Subject : R2-BLK(R),
Subject : R2-BLK(R),
R2-GAIN
For green, choose the sub-
jects G2-BLK and G2-
GAIN.
For black, choose the sub-
jects B2-BLK and B2-GAIN.
jects G2-BLK and G2-
GAIN.
For black, choose the sub-
jects B2-BLK and B2-GAIN.
2. Connect the oscilloscope to
pin (6)(TP1102) of SC1101
for red.
for red.
Pin (6)(TP1202) of
SC1201 for green
Pin (6)(TP1302) of
SC1301 for blue
»
Choose the subject R2-BLK and adjust the black peak
level to 2.7
level to 2.7
±
0.1V DC using the membrane switch or
the remote control button.
»
Next, choose the subject R2-GAIN and adjust the sig-
nal amplitude to 3.3
nal amplitude to 3.3
±
0.1 Vp-p.
»
Make the same adjustment for green and blue.
»
Feed the XGA gradation pattern single-color signal
and make sure that there is no difference in bright-
ness between adjacent vertical lines. If there is a dif-
ference, make fine adjustment by choosing the fol-
lowing subjects.
and make sure that there is no difference in bright-
ness between adjacent vertical lines. If there is a dif-
ference, make fine adjustment by choosing the fol-
lowing subjects.
R2-GAIN for red
G2-GAIN for green
B2-GAIN for blue.
G2-GAIN for green
B2-GAIN for blue.
3.3Vp-p
2.7V DC
1. Make the following choice:
Group : OUTPUT 1
Subject : R1-BLK
Subject : R1-BLK
R1-GAIN
(The color bar test pattern
is outputted automatically.)
For green, choose the sub-
jects G1-BLK and G1-
GAIN.
For black, choose the sub-
jects B1-BLK and B1-GAIN.
is outputted automatically.)
For green, choose the sub-
jects G1-BLK and G1-
GAIN.
For black, choose the sub-
jects B1-BLK and B1-GAIN.
2. Connect the oscilloscope to
pin (5)(TP1101) of SC1101
for red.
for red.
Pin (5)(TP1201) of
SC1201 for green
Pin (5)(TP1301) of
SC1301 for blue
6
RGB 1 system
black level
signal amplitude
black level
signal amplitude
»
Choose the subject R1-BLK and adjust the black peak
level to 2.7
level to 2.7
±
0.1V DC using the membrane switch or
the remote control button.
»
Next, choose the subject R1-GAIN and adjust the sig-
nal amplitude to 3.3
nal amplitude to 3.3
±
0.1 Vp-p.
»
Make the same adjustment for green and blue.
3.3Vp-p
2.7V DC
24
XG-XV2E/M/A
No.
Adjusting point
Adjusting conditions
Adjusting procedure
8
Sample-and-
hold pulse
phase
hold pulse
phase
1. Feed the SXGA mode black
signal.
2. Make the following choice:
Group : OUTPUT 3
Subject : SH-PHASE
Subject : SH-PHASE
»
Using the membrane switch or the remote control
button, make such adjustment that the characters on
the adjustment menu are least blurry or overlapped.
(Make adjustment at the moment when the group
name “OUTPUT3” appears and the subject name “SH-
PHASE” is not yet indicated.)
button, make such adjustment that the characters on
the adjustment menu are least blurry or overlapped.
(Make adjustment at the moment when the group
name “OUTPUT3” appears and the subject name “SH-
PHASE” is not yet indicated.)
1. Next feed the color bar sig-
nal via the VIDEO1 jack.
2. Make the following choice:
Group : OUTPUT3
Subject : RCK-PHASE
Using the remote control,
select the VIDEO1 IN
mode.
Then go to the following
subjects:
Subject : GCK-PHASE
Subject : BCK-PHASE
Subject : RCK-PHASE
Using the remote control,
select the VIDEO1 IN
mode.
Then go to the following
subjects:
Subject : GCK-PHASE
Subject : BCK-PHASE
»
Using the membrane switch or the remote control
button, make such adjustment that the "OUTPUT3"
characters are least blurry or ghostly. (If the accept-
able range is too wide, start with the initial setting of 8
and lower the setting until the least-blurry/ghostly
image is reached.)
Make sure the GCK-PHASE setting is 3.
Keep the initial BCK-PHASE setting intact.
button, make such adjustment that the "OUTPUT3"
characters are least blurry or ghostly. (If the accept-
able range is too wide, start with the initial setting of 8
and lower the setting until the least-blurry/ghostly
image is reached.)
Make sure the GCK-PHASE setting is 3.
Keep the initial BCK-PHASE setting intact.
11
RGB white
balance
balance
1. Feed the XGA gray scale
signal.
Group : OUTPUT 1
Subject : R1-BLK
Group : OUTPUT 1
Subject : R1-BLK
R1-GAIN (R)
B1-BLK
B1-GAIN (B)
B1-GAIN (B)
»
Choose the subjects R1-BLK and B1-BLK and adjust
the black balance of the gradation. Choose the sub-
jects R1-GAIN and B1-GAIN and adjust the gray-to-
while balance (so that the entire screen looks
colorless).
the black balance of the gradation. Choose the sub-
jects R1-GAIN and B1-GAIN and adjust the gray-to-
while balance (so that the entire screen looks
colorless).
10
RGB gradation
regeneration
adjustment
regeneration
adjustment
1. Feed the XGA green-only
gradation pattern (more
than 16 steps) signal.
Group : OUTPUT 1
Subject : G1-GAIN
than 16 steps) signal.
Group : OUTPUT 1
Subject : G1-GAIN
»
Adjust the G1-GAIN data until the first and second
gradations can be slightly recognized. (First gradu-
ally raise the G1-GAIN level until the gradation gets
recognized, and then adjust the level by lowering it
again.)
gradations can be slightly recognized. (First gradu-
ally raise the G1-GAIN level until the gradation gets
recognized, and then adjust the level by lowering it
again.)
9
RGB counter-
voltage
adjustment
voltage
adjustment
1. Feed the black-and-red
(25%) stripe signal (XGA).
If such a pattern signal is
not available, select the
horizontal stripe signal from
the desktop pattern menu.
If such a pattern signal is
not available, select the
horizontal stripe signal from
the desktop pattern menu.
2. Make the following choice:
Group : OUTPUT 3
Subject : RC (R)
Subject : RC (R)
»
Using the membrane switch or the remote control
button, adjust the data in order to minimize the flicker.
button, adjust the data in order to minimize the flicker.
»
Make the same adjustment for BC (B) and GC (G).
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