Sharp PG-C20X Service Manual download pdf (Page 24)

No. Adjusting point Adjusting conditions Adjusting procedure

PG-C20XU

PG-C20XE

AN-Z7T

5 Sample hold

pulse phase

checking

» Feed the G (30%) signal to see if there is no vertical

stripe visible on the screen. If it is visible, adjust the

setting to somewhere between 160 and 200.

Make also sure that the R and B settings are as fol-

lows.

R_CLDLY 171

R_REVCLDLY 175

B_CLDLY 175

B_REVCLDLY 178

1. Feed the XGA mode mono-

chrome signal.

2. Select the following group,

sub-group and subjects.

Group : LCD2(6050)

Sub-group: CLDLY

Subject : R_CLDLY

G_CLDLY

B_CLDLY

R_REVCLDLY

G_REVCLDLY

B_REVCLDLY

2.1Vp-p

3.8Vp-p

4 Panel input

signal amplitude

adjustment

1. Select the following group,

sub-group and subjects.

Group : Adjust PC image

Sub-group: CXA2111R

Subject :

AMP-R-GAIN (In R adjustment)

AMP-R-BLK (In R adjustment)

AMP-G-GAIN (In G adjustment)

AMP-G-BLK (In G adjustment)

AMP-B-GAIN (IN B adjustment)

AMP-B-BLK (IN B adjustment)

2. Connect the synchroscope

to the following TPs.

In R adjustment TP1101

In G adjustment TP1201

In B adjustment TP1301

3. Feed the XGA 10-step sig-

nal.

1.Select AMP-R-GAIN and adjust the signal amplitude

to 3.8 ± 0.1. Select 0.1Vp-p.

2.Select AMP-R-BLK and adjust the white-white sig-

nal amplitude to 2.1 ± 0.1Vp-p.

Note: Make sure that the black side does not interfere

in GAIN adjustment.

Adjust the amplitude as for G and B in the same

procedure.

3 Drive adjust-

ment

1. Feed the XGA 10-step sig-

nal.

2. Select the following group,

sub-group and subjects.

Group : Adjust PC Image

Sub-group: AD

Subject :

R-Contrast (In R adjustment)

G-Contrast (In G adjustment)

B-Contrast (In B adjustment)

3. Connect the synchroscope

(0.2V/div.) to the following

TPs.

In R adjustment TP1403

In G adjustment TP1402

In B adjustment TP1401

» First reach a setting where the color tone level 10

gets saturated. Then decrease the setting by one

point.

0-gradation

10-gradation

0.8Vp-p

1 2 ... 19 20 21 22 23 24 25 26 27 28 29 ... 135 136

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Sharp PG-C20X Service Manual Page 24

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