XG-C465X (serv.man4). Electrical Adjustment - Sharp Projector Service Manual (repair manual). Page 8

XG-C435X/C465X

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8

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).
5.1 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).
0.5 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.

9

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 16 in the following case: When the ENBR-DLY value is 20, 
pre-ghost appears; when it is 19, pre-ghost disappears.)

4) Adjust green and blue in the same way.

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

improve the ghost quality, perform this adjustment.

10

RGB counter voltage 
adjustment

1) 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.

11

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

12

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

13

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 (125 - 3).

Check that keystone is caused by tilting the unit.

14

Model name writing

1) Write the model name with RS232C 

command.

1) C465: MF_10000 (default)

C435: MF_10001

15

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: Red and blue down
3: Red and blue up

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

ance.

16

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.

White-white (2)

Amplitude (1)