Download  Print this page

Adjustment - Compaq CRT Monitor s7500 Service Manual

Color monitor.
Hide thumbs

Advertisement

Table of Contents
GENERAL INFORMATION
All adjustment are thoroughly checked and corrected
when the monitor leaves the factory, but sometimes
several adjustments may be required.
Adjustment should be following procedure and after
warming up for a minimum of 30 minutes.
• Alignment appliances and tools.
- IBM compatible PC.
- Programmable Signal Generator.
(eg. VG-819 made by Astrodesign Co.)
- EPROM or EEPROM with saved each mode data.
- Alignment Adaptor and Software.
- Digital Voltmeter.
- White Balance Meter.
- Luminance Meter.
- High-voltage Meter.
AUTOMATIC AND MANUAL DEGAUSSING
The degaussing coil is mounted around the CDT so that
automatic degaussing when turn on the monitor. But a
monitor is moved or faced in a different direction, become
poor color purity cause of CDT magnetized, then press
DEGAUSS on the OSD menu.
ADJUSTMENT PROCEDURE & METHOD
- Install the cable for adjustment such as Figure 1and run
the alignment program on the DOS for IBM compatible PC.
- Set external Brightness and Contrast volume to max position.
1. Adjustment for B + Voltage.
1) Display cross hatch pattern at Mode 8.
2) Check C999 (+) voltage to 50± 0.5Vdc.
2. Adjustment for High-Voltage.
1) Display cross hatch pattern at Mode 8.
2) DIST.ADJ CTRL PWM
3) Adjust High Voltage to 25.5kV
4) Press Enter Key.
3. Adjustment for Factory Mode (Preset Mode).
1) Display cross hatch pattern at Mode 1.
2) Run alignment program for CQ771G on the IBM
compatible PC.
3) EEPROM
ALL CLEAR
<Caution> Do not run this procedure unless the
EEPROM is changed. All data in EEPROM (mode
data and color data) will be erased.
4) Power button of the monitor turn off
5) COMMAND PRESET START Y(Yes) command.
6) DIST. ADJ.
CTRL PWM

ADJUSTMENT

High Voltage Command.
± 0.3 kVdc.
Y(Yes) command.
turn on.
TILT command.
- 10 -
7) Adjust tilt as arrow keys to be the best condition.
8) DIST. ADJ.
BALANCE command.
9) Adjust parallelogram as arrow keys to be the best
condition.
10) Adjust balance of pin-balance as arrow keys to be
the best condition.
11) DIST. ADJ.
FOS. ADJ command.
12) Adjust V-SIZE as arrow keys to 234
13) Adjust V-POSITION as arrow keys to center of the
screen.
14) Adjust H-SIZE as arrow keys to 312
15) Adjust H-POSITION as arrow keys to center of the
screen.
16) Adjust S-PCC (Side-Pincushion) as arrow keys to be
the best condition.
17) Adjust TRAPEZOID as arrow keys to be the best
condition.
18) Save of the Mode 1.
19) Display from Mode 1 to 8 and repeat above from
number 12) to 19)
20) PRESET EXIT
Y (Yes) command.
4. Adjustment for White Balance and Luminance.
1) Set the White Balance Meter.
2) Press the DEGAUSS on the OSD menu for
demagnetization of the CDT.
3) COLOR ADJ.
LUMINANCE command of the
alignment program.
4) Set Brightness and Contrast to Max position.
5) Display color 0,0 pattern at Mode 8.
6) COLOR ADJ.
BIAS ADJ.
command of the alignment program.
7) Check whether green color or not at R-BIAS and G-
BIAS to min position and B-BIAS to 127(7F) and
Sub-Brightness to 177(B1) position. Adjust G2
(screen) command to 0.4
luminance.
8) Adjust R-BIAS and G-BIAS command to x=0.283
0.005 and y=0.298
Meter with PC arrow keys.
9) Adjust SUB-Brightness command to 0.5
raster luminance.
10) Adjust repeat number 8).
11) After push the "ENTER" key.
11-1) COMMAND
PRESET START
12) Display color 15,0 full white pattern at Mode 8.
13) DRIVE ADJ.
No 1. command.
± 2mm.
± 2mm.
COLOR No.
± 0.05FL of the raster
± 0.005 on the White Balance
± 0.1FL of the
Y(Yes) command.
1
±

Advertisement

Table of Contents

   Also See for Compaq CRT Monitor s7500

   Related Manuals for Compaq CRT Monitor s7500

This manual is also suitable for:

Mv7500Cv7500

Comments to this Manuals

Symbols: 0
Latest comments:
  • mesa Mar 31, 2017 04:23:
    muy, pero muy bueno el manual del monitor, lo que hace falta es cvomo descargarl​o