3G Technology GL-821S User Guide

Table of Contents

Operating Instructions

Operating Instructions ____________________________ 1
Safety Precautions ______________________________ 2
Care and Maintenance ___________________________ 3

CHAPTER 1

Introduction ____________________________________ 4
Before Installing Your Monitor ______________________ 4
About Your Monitor ______________________________ 4
RGB Mode ____________________________________ 4
Factory-Preset Modes ___________________________ 5
Specifications __________________________________ 6

CHAPTER 2

Product Package _______________________________ 8
Installing the Monitor ____________________________ 8
Follow these Steps to Install the Monitor _____________ 9
Control Functions _______________________________ 10
Description ____________________________________ 11

CHAPTER 3

Adjusting the Monitor ____________________________ 12
OSD Screen ___________________________________ 12

APPENDIX

Troubleshooting ________________________________ 15

Operating Instructions

Thank you for purchasing this high-resolution multi-scan color monitor.
Please read this guide thoroughly before installation.

FCC RADIO FREQUENCY INTERFERENCE STATEMENT
WARNING: (FOR FCC CERTIFIED MODELS)

This monitor has been tested and found compliant with the limits for a
Class B digital device, pursuant to part 15 of the FCC Rules. These
limits are designed to provide proper protection against harmful
interference to a residential installation. This monitor generates, uses,
and can radiate radio frequency energy. Harmful interference to radio
communication may result if it is not properly installed and used.
However, there is no guarantee that interference will not occur in a
particular installation. If this monitor does cause serious interference to
radio or television reception, resetting the monitor may resolve the
problem. Moreover, users are encouraged to correct interference by
doing one or more of the following:

 Reposition or relocate the receiving antenna.
 Move the monitor and the receiver further away from each other.
 Connect the monitor into an outlet on a circuit different from that

to which the receiver is connected.

 Consult your local dealer or a qualified technician.

FCC Warning:

To assure a continued FCC compliance, a user must use a grounded
power supply cord and the provided shielded video interface cable with
bonded ferrite cores. Also, any unauthorized changes or modifications
to this monitor will void the user’s authority to operate this device.

Note: If necessary, shielded interface cables and the A.C. power cord
must be used to meet the emission level limits.

EMI Certification

The Class B digital apparatus meets all requirements of the Canadian
Interference-Causing Equipment Regulation. Cet appareil numerique
de class B respecte toutes les exigences du Reglement sur Ic materiel
brouilleur du Canada.

1

Safety Precautions

This monitor is manufactured and tested on the principle that the
user’s safety comes first. However, improper use or installation may
not only damage the monitor but endanger the user as well. As a
safety precaution, go over the following WARNINGS carefully before
installation, and keep this guide handy.

Warnings:

 This monitor should be operated only at the correct power

sources indicated on the label at the rear end of the monitor. If
you are unsure of the power supply in your residence, consult
your local dealer or Electricity Supplier.

 Do not try to repair the monitor yourself, as it contains no

user-serviceable parts. The monitor should only be repaired by a
qualified technician.

 Do not remove the monitor cabinet. There are high-voltage parts

inside that may cause an electric shock even when the power
cord is disconnected.

 Stop using the monitor if the cabinet is damaged. Have it checked

by a service technician.

 Put your monitor only in a clean, dry environment. Unplug the

monitor immediately if it gets wet, and consult your service
technician.

 Always unplug the monitor before cleaning it. Clean the cabinet

with a clean, dry cloth. Apply non-ammonia-based cleaner onto
the cloth, not directly onto the glass screen.

 Keep the monitor away from magnetic objects, motors, TV sets,

and transformers.

 Do not place heavy objects on the cable or power cord.
 For PLUG CABLE EQUIPMENT, the socket outlet should be

installed near the equipment and should be easily accessible.

2

Care and Maintenance

Care

 Avoid exposing your monitor directly to sunlight or other heat

sources. Place your monitor away from the sun to reduce glare.

 Put your monitor in a well-ventilated area. Do not place anything

heavy on top of your monitor.

 Make certain that your monitor is installed in a clean and

moisture-free area.

 Keep your monitor away from magnets, motors, transformers,

speakers, and TV sets.

Safety Tips

 If smoke, an abnormal noise or an odor comes out of your

monitor, switch off the power immediately and call our service
center.

 Never remove the rear cover of your monitor cabinet. The display

unit inside contains high-voltage parts and may cause an electric
shock.

 Never try to repair the monitor yourself. Always call your service

center or a qualified technician to fix it.

Note: This user’s manual contains graphics and information that is for
reference purposes only and is subject to change without notice.

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CHAPTER 1

INTRODUCTION

BEFORE INSTALLING YOUR MONITOR

READ THIS MANUAL COVER TO COVER.

PAY ATTENTION to all WARNING and CAUTIONS

DO NOT use computer components not recommend by the
manufacture

Do not attempt to service the monitor your self. If a problem

occurs, contact the manufacture's authorized service center

ABOUT YOUR MONITOR

This monitor is a microprocessor-controlled, color monitor which

uses a TFT LCD panel. The monitor conforms to EPA Energy Star

and VESA DPMS ( Display Power Management Signaling) power

management standards.

RGB MODE

This monitor is equipped with a microprocessor that identifies your

computer’s video mode and allows user to adjust the setting.

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FACTORY-PRESET MODES

Table 1 shows standard video mode setting that have been
pre-adjusted at the factory for accurate video display. These
setting are stored in the monitor's memory

Table 1. Factory-Preset Modes

Mode Resolution H-Freq.(KHz) V-Freq(Hz)
NEC 640x400 24.83 56.4
VGA 640x350

720x400
640x480
640x480
640x480

SVGA 800x600

800x600
800x600
800x600

XGA

SXGA 1280x1024

Macintosh 640x480

1024x768
1024x768
1024x768

1280x1024

832x624
1024x768
1024x768

31.47

31.47

31.47

37.86

37.5

35.16

37.88

48.08

46.87

48.36

56.47
60

63.98
80
35

49.7

48.78

60.241

70
70
60
72
75

56.3

60.3

72.2
75
60
70
75
60
75

66.7

74.55
60

74.927

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SPECIFICATIONS

 17” LCD Monitor

Overall Dimension(HxWxD): 426 x 444 x 546 mm
Gross/Net Weight: 14Kg/13Kg
Effective Display area(H/V): 337.92 x 270.34 mm
Display colors: 16M colors

Scan Frequencies:
Horizontal 31.47K to 80KHz
Vertical 60Hz to 75Hz

Number of Pixels: 1280x1024 pixels

Pixel pitch: 0.264x0.264 mm

Picture Tube: 17" TFT LCD panel

Power:
Input 110-240VAC
Frequency: 48-62Hz
Consumption 45Watts maximum
1 Watt (Power saving off mode)

Video Connector: 15pin Mini D-sub (Standard)

Audio connector (optional) 1 x stereo input

1 x Microphone output

Speaker (optional) 2W x 2
RGB Signals:

Video Analog RGB 0.7Vp-p/75Ω
Sync Separate

Display Data Channel:
Compatibility VESA DDC 1/2B

(auto-sensing)

(on)

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Operations:
User Controls On/Off Power Button
Select and adjust button
Auto-adjustment
On Screen Display Contrast, Brightness
Adjustment H-position, V-position
Color temperature
Multi-language

Auto Adjustment
Volume, Mute

Control Type: Digital

Compatibility: IBM and compatible, Apple

Macintosh, NEC

Environmental Limits:

Operating Temp 32° to 113°F ( 0° to 45°C )

Storage Temp. -4° to 140°F ( -20° to 60°C )
Operating Humidity 10 to 85% without condensation
Storage Humidity 10 to 95% without condensation

Agency Approval
EMI FCC-B
Energy Saving EPA energy star, VESA DPMS
Safety UL/CUL

7

 CHAPTER 2

PRODUCT PACKAGE

Open the shipping carton and check the contents. If any
items are missing or damaged, contact your dealer
immediately.

The package should include the following items

 Analog Color TFT LCD Monitor
 Accessory Box :

1. VGA cable x 1

2. AC to DC adapter x 1

3. Audio cable

4. Power Cord x 1

5. User’s manual x 1

INSTALLING THE MONITOR

The monitor is equipped with an auto sensing power supply
for voltage ranges from 110~240VAC, 60/50Hz. Confirm the
line voltage designation on the rear panel of the monitor.

FOLLOW THESE STEPS TO INSTALL THE
MONITOR

1. Before you connect the cables, make sure that the
monitor and the system unit power switches are OFF

2. Plug one end of the 15pin signal cable to the monitor and
the other end to the video signal connector at the rear of
the system. Tighten the two screws on the cable
connector on both ends, otherwise the screen will be

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abnormal and LED light is yellow color, not the normal
green color.

3. Connect the power to the monitor through the AC/DC
adapter

4. Connect the power cord on the AC outlet, please see the
below drawing.

RGB

DC IN

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CONTROL FUNCTIONS

The Monitor control functions are located on the lower center of
the front view side. They are shown in the figure below and
described in the following paragraphs.

The control key description

1. : Power Switch

2. / + : Decrement/Increment or Volume control

3. ∇/ ∆ : Cursor Up/Down or Brightness control

4. MENU : Activate the on screen display function

5. Auto : Auto adjustment

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Descriptions

1. : Power switch

Use the power switch to turn ON or OFF power. We
recommend turning your system power on first, then the
LCD monitor

2. & + : decrement & increment/ Volume Control keys

The two keys have two functions, controlled by the MENU
key. When activating OSD screen, the two keys are
defined to decrement or increment the values of each
selected items. When de-activating OSD screen, these
two keys are used to change the speaker volume value.

3. ∇ & ∆ : Select key / Brightness Control keys

The two keys have two functions, controlled by the MENU
key. When activating OSD screen, the two keys are used
to select the wanted adjustment items. When
de-activating OSD screen, these two keys are used to
change the Brightness value.

4. Menu

Press the Menu key to activate the on screen display
screen. It is a toggle key. Press twice to turn off the on
screen display screen. After 30 sec idle time, the OSD
screen will automatically turn off.

5. Auto adjustment

Pressing this key to get the better visual performance.

CHAPTER 3

ADJUSTING THE MONITOR

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The LCD monitor is designed to work with a range of
compatible video adapters on the market. Due to the possible
deviations between these video adapters, you may make
some adjustment to fit the monitor for adapter used.

ADJUSTMENT PROCEDURE

1. First, you must activate the OSD screen through pressing
the MENU key, the screen will show in the center of
screen as below:

Note: In the last paragraph, we will assume that you had
already done this procedure and only explain how to
change the setting.

OSD SCREEN

2. Use the / + key to select the required adjustment item ,
then press Menu to adjust the setting.

3. Use the & + key to change the setting .

AUTO-ADJUSTMENT

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WE STRONGLY RECOMMEND THAT YOU USE
THIS ITEM TO GET THE OPTIMIZED VISUAL
QUALITY.

The descriptions of each icon are below:

Brightness adjustment

Contrast adjustment

Move the screen horizontally

Move the screen vertically

Screen clock adjustment

Screen phase adjustment

Color temperature setting

Screen information

OSD location setting

Speaker volume control

OSD timing setting

Recall the factory default setting

Multilanguage selection

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4. Hot key definitions

We offer four most adjustment item as hot key to easily
change the setting, you don’t need to enable OSD menu

I. Auto-Adjustment

Pressing A key on the OSD button

II. Volume adjustment

Pressing ∆ key to enable the Volume sub-menu

III. Brightness adjustment

Pressing  key to enable the brightness sub-menu

IV. Contrast adjustment

Pressing + key to enable the contrast sub-menu

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Appendix

Troubleshooting Procedures

This LCD Monitor was pre-adjusted in the factory with standard
VGA timing. Due to output timing differences among various
VGA cards, you may initially experience an unstable or unclear

display when a new display mode or new VGA card is selected.

This LCD Monitor Supports Multiple VGA Modes. Refer to timing table
for a listing of the factory-preset modes supported by this LCD Monitor.

PROBLEM: There is no LCD Display

If there is no display on the LCD, please perform the following
steps:

1. Make sure that the power indicator on the LCD
Monitor is lit, all connections are secure, and the
system is running on the correct timing. Refer to
the Addendum for information on timing.

2. Turn off the LCD Monitor and then turn it back on
again. Press the upper Function Control button
(refer to Chapter 2) once and then press either the
upper or lower Adjustment Control button several
times. If there is still no display, press the other
Adjustment Control button several times.

3. If step 2 doesn’t work, connect your PC system to
another external CRT. If your PC System functions
properly with a CRT Monitor but it does not function
with the LCD Monitor, and the LCD Monitor’s power
LED is blinking, the output timing of the PC’s VGA
card may be out of the LCD’s synchronous range.
Please change to an alternate mode listed in
Addendum or replace the VGA card and repeat
steps 1 and 2.

4. If the PC doesn’t function with the CRT monitor
neither, check BIOS to see if there is a dual scan

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setting under the display mode item. Set the BIOS
display mode to Dual Scan or CRT and try again. If
there is still no display, then there may be a problem
with your system. Contact technical support.

5. If the power LED is not lit, check to see if the AC
power connector is securely connected. Verify that
the AC adapter LED is lit. If the AC adapter LED is
not lit, please contact your dealer for assistance

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