XG-C40XE (serv.man4). Service Manual - Part 1 - Text (1-31) - Sharp Projector Service Manual (repair manual). Page 26

2.0V DC

6.2

±

0.2V DC

PSIG

GND

(Adjust with PSIG-H.)

(Adjust with PSIG-L.)

1. Connect the oscilloscope to

TP1701 for red.

    TP1702 for green
    TP1703 for blue.

2. Make the following choice:

Group : OUTPUT 2
Subject : PSIG-H

: PSIG-L

»

Adjust the PSIG waveform to the one shown below.

»

For the green and blue colours, make sure their wave-
forms are similar to that of the red colour.

»

Make sure the pin stripe of every 12 dot doesn't ap-
pear at 10 steps signal of side nays.
(Appearing white pin stripe or black one, adjust the
PSIG-H.)

1. Project the XGA60Hz ghost

test pattern (black charac-
ters in bold on the halftone
RGB background).
Group: OUTPUT3

2. GCK-PHASE adjustment

Make sure the setting is fixed
at 8 (initial value).

3. EN-WIDTH adjustment

Make sure the setting is fixed
at 8 (initial value).

4. ENR-PHASE adjustment (R-

LCD ghost adjustment)

5. ENG-PHASE adjustment

(G-LCD ghost adjustment)

6. ENB-PHASE adjustment (B-

LCD ghost adjustment)

»

ENR-PHASE adjustment (R-LCD ghost adjustment)

1

Increase the setting until a ghost image (see
Note) becomes visible at the left of the back
characters on the R half-tone background.

2

Lower the setting point by point until the left-
hand ghost image (

1

 above) disappears.

3

Further lower the setting by one point.

»

ENG-PHASE adjustment (G-LCD ghost adjust-
ment)
Adjust the G ghost image by following the same
procedures described under step 1 above.

»

ENB-PHASE adjustment (B-LCD ghost adjust-
ment)
Adjust the B ghost image by following the same
procedures described under step 1 above.

Note: Left-hand ghost image: Characters are shown

double 12 dots left from the real characters.

Reference: This adjustment is made because the

EPSON LCD panel may have 1- or 2-
point differences due to lot-by-lot varia-
tions.

1. Feed the XGA mode 75-Hz

black signal.

2. Make the following choice:

Group : OUTPUT 3
Subject : SH-PHASE
(Have the standard level at
2.)
Fix the RCK-, GCK- and
BCK-PHASE settings all to
8.

»

Using the control switches or the remote controller
buttons, make sure that the “OUTPUT 3” charac-
ters are not blurry and there is no ghost image. If
such blur or ghost occurs, finely adjust the setting
in the range of 7~9.