XG-C455W (serv.man6). Electrical Adjustments - Sharp Projector Service Manual (repair manual). Page 9

XG-C455W/PG-C355W

4 – 9

1

EEPROM initialization

1)  Turn on the power (the lamp turns on) 

and perform aging for 15 minutes.

1) Perform the following setting.

Press S6501 to enter the process mode, and execute SS2 of the 
SS menu.

2

Model setting

(Process menu)
1) Select the following.

Group: MODEL
Adjustment item: MODEL-SELECT

1) Series bellow

XG-C455W: 0
PG-C355W: 1

3

R-bright check
Contrast adjustment 
(manual or automatic)

1) Input the white/black wind pattern sig-

nal of amplitude level 96% (0.67 Vpp)/
0% of  XGA60Hz to COMPUTER1.

2) Select the following.

Group: AD
Adjustment item:R-Bright
                           R-Contrast

(Process gamma linkage)

1) Check the fixed value.

R-Bright: 125

2) Observe the chromaticity of 96% white wind pattern portion using 

CA100.

3) On the screen where bit dropouts occur, raise the R-Contrast 

value. Adjust to the point where black to bright red bit dropouts 
occur and the x value changes by 30/1000 or more.

4

G-bright check
Contrast adjustment 
(manual or automatic)

1) Input the white/black wind pattern sig-

nal of amplitude level 96% (0.67 Vpp)/
0% of  XGA60Hz to COMPUTER1.

2) Select the following.

Group: AD
Adjustment item: G-Bright
                            G-Contrast

(Process gamma linkage)

1) Check the fixed value.

G-Bright: 125

2) Observe the chromaticity of 96% white wind pattern portion using 

CA100.

3) On the screen where bit dropouts occur, raise the G-Contrast 

value. Adjust to the point where black to bright green bit dropouts 
occur and the y value changes by 30/1000 or more.

5

B-bright check
Contrast adjustment 
(manual or automatic)

1) Input the white/black wind pattern sig-

nal of amplitude level 96% (0.67 Vpp)/
0% of  XGA60Hz to COMPUTER1.

2) Select the following.

Group: AD
Adjustment item: B-Bright
                            B-Contrast

(Process gamma linkage)

1) Check the fixed value.

B-Bright: 125

2) Observe the chromaticity of 96% white wind pattern portion using 

CA100.

3) On the screen where bit dropouts occur, raise the B-Contrast 

value. Adjust to the point where black to bright blue bit dropouts 
occur and the y value changes by 30/1000 or more.

6

Black level/amplitude 
adjustment of LCD 
panel input signal

1) Select the following.

Group: OUTPUT 1
Adjustment item: G1-BLK
                            G1-GAIN
                        R: R1-BLK
                             R1-GAIN
                        B: B1-BLK
                             B1-GAIN

2) Check that the white pattern for pro-

cess adjustment is displayed.

3) Connect a synchroscope to 2P of 

(P1401).

4) For red and blue, connect to (P1401-

1P) and (P1401-3P) respectively.

1) Select G1-GAIN, and adjust the signal amplitude as follows using 

the operation SW or button on the remote control (see figure (1) 
below).
4.6 Vpp 

± 0.05 V

2) Select G1-BLK, and adjust the white-white level as follows using 

the operation SW or button on the remote control (see figure (2) 
below).
0.8 Vpp 

± 0.1 V

3) Adjust red and blue in the same way.

(G waveform diagram of process pattern)

* The part defining the amplitude to the waveform is the same for both 
R and B.

7

Sample-hold pulse 
delay amount adjust-
ment

1) Input the black signal of XGA mode.
2) Select the following.

Group: OUTPUT3
Adjustment item: ENBR-DLY
                       G: ENBG-DLY
                       B: ENBB-DLY

1) Check the blur and ghost of characters of OUTPUT3.
2) Raise the ENBR-DLY value until pre-ghost appears on the left of 

characters of OSD.

3) When the value is reduced by 1 to 2 points, pre-ghost disappears. 

Set to the value reduced by 3 from the value where pre-ghost dis-
appears.
(Set to 8 in the following case: When the ENBR-DLY value is 20, 
pre-ghost appears; when it is 13, pre-ghost disappears.)

4) Adjust green and blue in the same way.
5) When vertical strips is visible, adjust ENBXG-PH (0 to 3)

NOTE: EPSON panels may vary by 1 to 2 points from lot to lot. To 

improve the ghost quality, perform this adjustment.

White-white (2)

Amplitude (1)