DOWNLOAD Sharp XR-20S Service Manual ↓ Size: 1.16 MB | Pages: 42 in PDF or view online for FREE

29

subjects.
Group : AD
Subject : R-Contrast
(Process GAMMA interlock)

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.

30

No.

Adjustment Items

Adjustment Conditions

Adjustment Procedures

8

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 exceeds 30/100.

9

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.

10

DTV Bright/ Contrast
adjustment

1. Select the following group and
subjects.
Group : DTV
Subject : Contrast / Bright

1. Check the fixed value.
Contrast : 4
Bright : 40

11

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 exceeds 30/100.

12

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 exceeds 30/100.

13

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 exceeds 30/100.

Adjustment of DTV Tint

1. Select the following group and
subject.
Group : DTV
Subject :Tint

1. Check the fixed value.
Tint : 3

Adjustment of DTV colour
saturation

1. Select the following group and
subject.
Group : DTV
Subject : Color

1. Check the fixed value.
Color : 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

Adjustment of DVD Tint

1. Select the following group and
subject.
Group : DVD
Subject : Tint

1. Check the fixed value.
Tint : 3

31

No.

Adjustment Items

Adjustment Conditions

Adjustment Procedures

11

RGB white balance
adjustment

1. Send grey 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

12

SRGB white balance
adjustment

1. Send grey 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

14

Adjustment of DVD colour
saturation

1. Select the following group and
subject.
Group : DVD
Subject : Color

1. Check the fixed value.
Color : 12

15

Adjustment of
DLP voltage 

1. Read voltage rank of DLP
description.
2. Set the switch corresponding to the
rank which has been read. (on the
formatter PWB)

1. Carry out adjustment when DLP chip has
been replaced or combination of chip and
formatter has been changed.
2. Rank: B C D E
Setting value: 1 2 3 4

16

Confirmation and re-
adjustment of white balance

1. RGB Input, sRGB Input, DTV Input,
DVD Input, VIDEO Input

Check that there is no deviation of white
balance with the monitor.

17

Auto keystone initialisation

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.

18

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

19

LAN operation check

1. Connect to a PC with a LAN cable.

1. Check that communication is possible.

20

Confirmation of off-timer
operation

1. Select the following group and
subjects.
Group :LAMP
Subject : OFF

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.

21

Confirmation of thermistor
operation

1. Heat the thermistor by dryer.

1. Confirm that the temperature is displayed.

22

Automatic sync operation

1. Receive the phase checking
pattern signal.

1. Confirm that Clock, Phase, H-POS and V-
POS can be automatically adjusted in the
VGA/S-VGA/XGA mode.

23

Confirmation of USB
operation

Connect the set to a personal
computer by USB cable.

Using the remote controller, make sure that
feed and return operations are effective on
the display of the personal computer.

24

Factory settings

1. 

Make the following settings.

32

• 

Although it is possible for the process OUT to exit using the process menu, the IN/OUT
toggle command is also available considering the existing specification.

1-1. 

Calling and quitting
With the menu not displayed, press the "ENTER", "ENTER", "VOL+", "VOL-",
"ENTER", "ENTER" and "MENU" keys on the remote control (one for C50/45 or
P25/20 system is also usable) or on the main unit.

1-2. Others

Press the S2551 process key (toggle) on the main PWB to call and quit the process
menu.

Note:  When adjusting in the process mode, set a signal with a vertical frequency of 60 Hz

or no signal. (May not be properly adjusted with other signals.)

2. Resetting the lamp timer for this model
2-1. Resetting 

procedure

In Stand-by, run this command to clear the operating time of the lamp to 0 and turn
on the power.
Press and hold """, "ENTER", and "MENU", and then press the "STANDBY/ON" key
of the set.

3. Forced disabling of the System-Lock of this model
3-1. Disabling 

procedure

With System-Lock input window onscreen, press the "MENU", "ENTER", "ENTER",
"MENU", "ENTER", "ENTER" and "MENU" keys, in this order, on the remote
controller.