XG-C455W (serv.man6). Electrical Adjustments - Sharp Projector Service Manual (repair manual). Page 10

XG-C455W/PG-C355W

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The following measurement and adjustment must be performed under the same conditions using the following:

• Dark room (Block out stray light.)

• Diffuse reflection (mat type) screen

The setting of the projector must be performed under the following conditions:

• Power save disabled (to keep the lamp stable during measurement)

• RGB mode of the input terminal COMPUTER1 (component mode canceled - just to be sure)

1. System setting (“Setting -” System setting””)

Condition setting for PG-C355W/XG-C455W

2. Teaching

Basically, teaching should be measured only once from model to model. However, if the optical characteristics of the set are changed significantly,
it is necessary to reset the conditions according to changes and to perform remeasurement.

Measurement method of correction factor

1) Determine the standard set of PG-C355W/XG-C455W. Each one unit (n units)

2) Switch the set to the RGB mode of the input terminal COMPUTER1.

8

RGB counter voltage 
adjustment

1) Input the counter voltage adjustment 

signal. (XGA)

2) Select the following.

Group: OUTPUT1
Adjustment item: R-COM
                            G-COM
                            B-COM
                            R-COM2
                            G-COM2
                            B-COM2

1) Adjust flicker using the operation SW or button on the remote con-

trol so that it becomes minimum.

2) When flicker appears on the screen unevenly, adjust the center 

area considering the whole balance.

9

RGB white balance 
adjustment

1) Input the RGB 50% gray signal. 

(XGA60Hz)

2) Select the following.

Group: OUTPUT1
Adjustment item: R1-BLK (R)
                            B1-BLK (B)

1) 1. Adjust R1-BLK and B1-BLK so that the following chromaticity 

values are obtained in the middle of the screen using CL200.
x = 294 

± 5, y = 327 ± 5

10

sRGB white balance 
adjustment

1) Input the RGB 50% gray signal.
2) Select the following.

Group: OUTPUT1
Adjustment item: S-G1-BLK
                            S-B1-BLK

1) Adjust S-G1-BLK and S-B1-BLK so that the following chromaticity 

values are obtained in the middle of the screen using CL200.
x = 322 

± 5, y = 341 ± 5

11

Auto keystone initial-
ization

1) Select the following.

Group: LINE
Adjustment item: Calibration

1) With the set placed on a level surface, press the ENTER key and 

check that K-Sensor value is 0 

± 3.

Check that keystone is caused by tilting the unit.

12

Tracking check

1) Input the RGB 10-step gray scale sig-

nal (inversion on top and bottom).

2) Select the following.

Group: OUTPUT3
Adjustment item: GAMMA

1) Check the lower gradation tracking.

When it is improper, optimize the GAMMA value.
1: Default (normal)
2: Green up
3: Red and blue up
4: Green up
5: Red up and blue down
6: Blue up
7: Red and green up
8: Green and blue up

NOTE: When changing the GAMMA value, readjust the white bal-

ance.

13

Auto color shading 
correction

1) Perform the auto color shading correc-

tion using the color shading correction 
system (ccdc).

1) Check that remarkable color shading is not found on the screen.

    System option
    Simultaneous writing of 3D correction value:

No (not checked)

    Char transmission interval:

0 ms

    Binary interval:

2 ms

    Creation of correction value by linear correction factor:

No (not checked)

    Number of image captures (during adjustment or measurement): Twice
    Number of image captures (during teaching):

4 times