XG-MB70X (serv.man10). Electrical Adjustments — Sharp Projector Service Manual (repair manual)

Model
XG-MB70X (serv.man10)
Pages
7
Size
61.16 KB
Type
PDF
Document
Service Manual
Brand
Device
Projector / Electrical Adjustments
File
xg-mb70x-sm10.pdf
Date

View Sharp XG-MB70X (serv.man10) Service Manual online

26
XG-MB70X
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 S3563 to call the process mode and execute
"SS2" on SS menu.
2
Adjustment of
CW index
1. Signal input: Feed 64
STEP color bar. (XGA 60
Hz)
2. Select the following group
and subject.
Group: DLP
Subject: Index Delay
No.
Adjusting point
Adjusting conditions
Adjusting procedure
3
R Contrast
adjustment
1. Send white/black window
pattern signals with 91%
(0.64 Vpp)/0% of amplitude
level of XGA 60Hz to input
1.
2. Select the following group
and subjects.
Group : AD
Subject : R-Contrast
(Process GAMMA interlock)
1. Check the fixed value.
R-Bright: 63
2. Observe the chroma of 91% white window pattern
with CA100.
3. Increase the R-Contrast value on the screen with bit
dropouts. Adjust the value to +5 when bright red bit
dropouts occur on the black and the x value exceeds
30/100.
1. Adjust the lamp patterns of RGB so that smooth
patterns appear without color blend and noise.
R
G
B
4
G Contrast
adjustment
1. Send white/black window
pattern signals with 91%
(0.64 Vpp)/0% of amplitude
level of XGA 60Hz to input
1.
2. Select the following group
and subjects.
Group : AD
Subject : G-Contrast
(Process GAMMA interlock)
1. Check the fixed value.
G-Bright : 63
2. Observe the chroma of 91% white window pattern
with CA100.
3. Increase the G-Contrast value on the screen with bit
dropouts. Adjust the value to +5 when bright green
bit dropouts occur on the black and the x value ex-
ceeds 30/100.
5
B Contrast
adjustment
1. Send white/black window
pattern signals with 91%
(0.64 Vpp)/0% of amplitude
level of XGA 60Hz to input
1.
2. Select the following group
and subjects.
Group : AD
Subject : B-Contrast
(Process GAMMA interlock)
1. Check the fixed value.
B-Bright: 63
2. Observe the chroma of 91% white window pattern
with CA100.
3. Increase the B-Contrast value on the screen with bit
dropouts. Adjust the value to +5 when bright blue bit
dropouts occur on the black and the x value exceeds
30/100.
6
DTV Bright/
Contrast adjust-
ment
1. Select the following group
and subjects.
Group : DTV
Subject : Contrast
 Bright
1. Check the fixed value.
Contrast : 4
Bright
: 40
No.
Adjusting point
Adjusting conditions
Adjusting procedure
27
XG-MB70X
8
DTV G Contrast
adjustment
(manual or
automatic)
1. Send white/black window
pattern signals with 100%
(0.7 Vpp)/0% of amplitude
level of 480P to input 1.
2. Select the following group
and subjects.
Group : AD2
Subject : G-Contrast2
(Process GAMMA interlock)
1. Check the fixed value.
G-Bright : 63
2. Observe the chroma of 100% white window pattern
with CA100.
3. Increase the G-Contrast2 value on the screen with
bit dropouts. Adjust the value to +5 when bright green
bit dropouts occur on the black and the x value ex-
ceeds 30/100.
10
Adjustment of
DTV Tint
1. Select the following group
and subject.
Group : DTV
Subject : Tint
1. Check the fixed value.
Tint
: 3
12
Adjustment of
DVD Bright /
Contrast
1. Select the following group
and subject.
Group : DVD
Subject : Contrast
 Bright
1. Check the fixed value.
Contrast : 4
Bright
: 40
13
Adjustment of
DVD Tint
1. Select the following group
and subject.
Group : DVD
Subject : Tint
1. Check the fixed value.
Tint
: 3
7
DTV R Contrast
adjustment
(manual or
automatic)
1. Send white/black window
pattern signals with 100%
(0.7 Vpp)/0% of amplitude
level of 480P to input 1.
2. Select the following group
and subjects.
Group : AD2
Subject : R-Contrast2
(Process GAMMA interlock)
1. Check the fixed value.
R-Bright: 63
2. Observe the chroma of 100% white window pattern
with CA100.
3. Increase the R-Contrast2 value on the screen with
bit dropouts. Adjust the value to +5 when bright red
bit dropouts occur on the black and the x value ex-
ceeds 30/100.
9
DTV B Contrast
adjustment
(manual or
automatic)
1. Send white/black window
pattern signals with 100%
(0.7 Vpp)/0% of amplitude
level of 480P to input 1.
2. Select the following group
and subjects.
Group : AD2
Subject : B-Contrast2
(Process GAMMA interlock)
1. Check the fixed value.
B-Bright: 63
2. Observe the chroma of 100% white window pattern
with CA100.
3. Increase the B-Contrast2 value on the screen with
bit dropouts. Adjust the value to +5 when bright blue
bit dropouts occur on the black and the x value ex-
ceeds 30/100.
11
Adjustment of
DTV color satura-
tion
1. Select the following group
and subject.
Group : DTV
Subject : Color
1. Check the fixed value.
Color
: 12
No.
Adjusting point
Adjusting conditions
Adjusting procedure
28
XG-MB70X
14
Adjustment of
DVD color satura-
tion
1. Select the following group
and subject.
Group : DVD
Subject : Color
1. Check the fixed value.
Color
: 12
15
Video Bright /
Contrast adjust-
ment
1. Select the following group
and subjects.
Group : VIDEO
Subject : Contrast
 Bright
1. Check the fixed value.
Contrast : 4
Bright
: 40
16
Adjustment of
VIDEO Tint
1. Select the following group
and subject.
Group : VIDEO
Subject : N-Tint
  P-Tint
  S-Tint
1. Check the fixed value.
N-Tint
: 3
P-Tint
: 3
S-Tint
: 3
17
Adjustment of
VIDEO color
saturation
1. Select the following group
and subject.
Group : VIDEO
Subject : N-Color
  P-Color
  S-Color
1. Check the fixed value.
N-Color
: 7
P-Color
: 7
S-Color
: 7
18
RGB white
balance adjust-
ment
1. Send gray pattern signals
with 50% of amplitude level
of XGA60Hz.
2. Select the following group
and subjects.
Group : DLP
Subject : R-Contrast
  B-Contrast
1. Adjust the R-Contrast and B-Contrast so that the
following values for chroma are obtained:
x value: 280 ± 5
y value: 306 ± 5
19
sRGB white
balance adjust-
ment
1. Send gray pattern signals
with 50% of amplitude level
of XGA60Hz.
2. Select the following group
and subjects.
Group : DLP
Subject : S-G-Contrast
  S-B-Contrast
1. Adjust the S-G-Contrast and S-B-Contrast so that
the following values for chroma (6500K) are
obtained:
x value: 313 ± 5
y value: 329 ± 5
20
Auto keystone
initialization
1. Select the following group
and subjects.
Group : LINE
Subject : Calibration
1. Place the unit on the level surface, and adjust to 1
from 0.
2. Check that the K-Sensor value is 0 ± 3 and that
the keystone is caused by inclining the unit.
29
XG-MB70X
No.
Adjusting point
Adjusting conditions
Adjusting procedure
21
Adjustment of
DLP voltage
1. Read voltage rank of DLP
description.
2. Set the switch correspond-
ing to the rank which has
been read.
1. Carry out adjustment when DLP chip has been re-
placed or combination of chip and formatter has been
changed.
Rank:
B C D E
Setting value: 1 2 3 4
Adjustment when assembling
No.
Adjusting point
Adjusting conditions
Adjusting procedure
22
Adjustment of
DLP Brightness
1. Select the following group
and subject.
Group : DLP
Subject : R-Bright
G-Bright
B-Bright
1. Check the fixed value.
Fixed value
: 32
Checkpoints
23
RGB tone
reproduction
adjustment
1. Make sure the 100% and 95% white as well as the
0% and 5% black gradations are visible.
1. Feed the SMPTE pattern
signal.
24
White balance
checking and
readjustment
1. RGB Inputt, sRGB Input,
DTV Input, DVD Input,
VIDEO Input
Check that there is no deviation of white balance with
the monitor.
1. Select OFF from the process mode.
Make sure the off-timer starts with 5 minutes
onscreen and count one minute in one second.
And then indication is 0 minute, the power supply
of the set is cut off.
25
Off-timer per-
formance
1. Heat the thermistor with a
hair dryer.
1. Make sure that the temperature is indicated.
26
Thermistor
performance
checking
1. Feed the phase check pat-
tern signal.
1. In the VGA, SVGA, XGA and SXGA modes, make
sure the Clock, Phase, H-Pos and V-Pos settings
can be automatically adjusted.
27
Auto sync
performance
checking
1. Connect to a PC with a
USB cable.
1. Check that advance/reverse operation on PC screen
is possible by using remote control.
28
USB operation
check
1. Select the following group
and subjects.
Group : LAMP
Subject : OFF
1. Connect to a PC with a
LAN cable.
1. Check that communication is possible.
29
LAN operation
check
Page of 7
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