Sharp XG-C50X Manuel de service télécharger pdf (Page 20)

XG-C50X

ELECTRICAL ADJUSTMENT

1 Initialization of

EEPROM

1. Turn on the power (the lamp lights

up) and warm up the system for 15

minutes.

No. Adjustment Items Adjustment Conditions Adjustment Procedures

1. Make the following settings.

Press S2601 to enter the process

mode, and execute S2 on the SSS

menu. Now the EEPROM, except for

the PC I/F unit, is initialized.

Do not execute S1, or the PC I/F unit

itself will be initialized.

(The PC I/F unit has been factory-

adjusted.)

To adjust the PC I/F unit, refer to "How

to Adjust the PC I/F unit" on the last

page.

2 Adjustment of

RGB1 black level

signal amplitude

1. Select the following group and sub-

jects.

Group: OUTPUT1

Subject: G1-BLK, G1-GAIN

For the color R, select the subjects

R1-BLK and R1-GAIN.

For the color B, select the subjects

B1-BLK and B1-GAIN.

2. Make sure the process adjustment

color bars are displayed.

3. For the color G, connect a oscillo-

scope to pin (2) of P1301.

4. For the colors R and B, connect the

oscilloscope to pin (1) of P1301 and

pin (3) of P1301, respectively.

1. Select the subject G1-GAIN. Using

the set's control switch or the remote

controller button, adjust the setting

so that the signal amplitude is 4.0

Vp-p±0.05 V.

2. Select the subject G1-BLK. Using the

set's control switch or the remote

controller button, adjust the setting

so that the white-to-white level is 1.8

Vp-p±0.1 V.

3. Do the same for the other colors R

and B.

~ The G1 subjects are linked with the

R1 and B1 subjects.

When the G1-BLK setting has been

changed, therefore, the R1-BLK and

B1-BLK settings vary themselves

accordingly. When the G1-GAIN set-

ting has been changed, equally, the

R1-GAIN and B1-GAIN settings vary

themselves accordingly. First make

the G1 settings and then readjust the

R1 and B1 settings as required.

3 Adjustment of

PSIG

1. Select the following group and sub-

jects.

Group: OUTPUT2

Subject: PSIG-H, PSIG-L

Make sure the PSIG-H and PSIG-

L settings are 64 and 100, respec-

tively.

1. Get the PSIG waveform displayed.

(Feed the XGA signal.)

2.5V DC 5.6V DC

GND

PSIG

Adjust the PSIG-H setting. Adjust the PSIG-L setting.

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Sharp XG-C50X Manuel de service Page 20

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