Solutions for Demanding Applications VarTech Systems Inc. Industrial CRT and Flat Panel Displays VT20A 20” Auto Sync Color Monitor 15 to 50kHz For Models: VT20A-C · VT20A-CH · VT20A-CY VT20A-R · VT20A-RH · VT20A-M User’s Guide Read these instructions completely before attempting to operate your new Color Display.
TABLE OF CONTENTS Sections 1.0 Page Warning FCC Statement 1-3 Warning and Caution 1-2 FCC Statement 2.0 3.0 Connections 3 4-5 Video Connectors 4 Timing 5 Controls 6-7 User Controls 6 Screen Control Definitions 7 4.0 Power Management 8 5.0 Troubleshooting 9 6.0 Mechanical Drawings 10-17 VT20A-C Mechanical 11-12 VT20A-CH Mechanical 13 VT20A-CY Mechanical VT20A-R Mechanical 14 VT20A-RH Mechanical 15 VT20A-M Mechanical 7.
Section 1 WARNINGS and FCC Statement WARNING TO PREVENT FIRE OR SHOCK HAZARD, DO NOT EXPOSE THIS MONITOR TO RAIN OR MOISTURE. “HIGH VOLTAGE EXISTS ON THE CATHODE-RAY TUBE ANODE LEAD OF THIS MONITOR. BEFORE SERVICING, DETERMINE THE PRESENCE OF HIGH VOLTAGE BY CONNECTING THE H.V. METER BETWEEN THE ANODE OF CRT CAP AND CHASSIS ONLY.” CAUTION 1. Keep monitor away from excessive dust, high temperature, moisture or direct sunlight. 2. Use in well ventilated area and do not cover ventilation openings. 3.
IMPORTANT SAFETY INSTRUCTIONS Prior to using this product, please ensure that you have carefully followed all the procedures outlined in the user’s manual for this product. 1. 2. 3. 4. Read all of these instructions. Save these instructions for later use. Follow all warnings and instructions marked on the product. Unplug this product from the wall outlet before cleaning. Do not use liquid cleaners or aerosol cleaners. Use a damp cloth for cleaning. 5. Do not use this product near water. 6.
Federal Communications Commission Requirements The equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to part 15 of FCC rules. These limits are designed to provide reasonable protection against harmful interference in an industrial installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in strict accordance with the instructions, may cause harmful interference to radio communications.
Section 2 CONNECTORS 15 Pin D CONNECTOR: This is an industry standard connector providing easy connection to VGA type video sources.
Timings VGA1 640 X 350 VGA2 720 X 400 VGA3 640 X 480 MAC35k 1 2 3 4 Hor. Freq (kHz) 31.468 31.468 31.468 34.975 Vert. Freq. (Hz) 70.09 70.09 59.94 66.62 Dot Clock (MHz) 25.175 28.322 25.175 31.3344 Hor. Total Time 31.778 31.778 31.778 28.59 Hor. Active Time (us) 26.058 26.058 26.058 20.421 Front Porch (us) 0.318 0.318 0.318 2.553 SYNC Pulse Width (us) 3.81 3.81 3.81 2.042 Back Porch (us) 1.589 1.589 1.589 3.574 Border (us) 0.32 0.32 0.32 0 Vert.
Section 3 CONTROLS CONTROL LOCATION NOTE: VT20A-C, VT20A-CH, VT20A-R, All controls are located on the right side of the monitor. VT20B-R, VT20A-RH, VT20A-M All controls are located on the front of the monitor. VarTech 1 2 3 4 OSD (On Screen Display menu) CONTROLS AND ADJUSTMENTS: There are four switches on the control panel with Key Function: Feature Function 1 MENU Call the Main-Menu OSD 2 SEL Select different OSD functions 3 UP Change the setting of the selected OSD function.
SCREEN CONTROL DEFINITIONS Feature Function Brightness To adjust the overall screen intensity Contrast To adjust the intensity difference between the video image and the background display raster V-center To adjust the vertical position of the display image V-size To adjust the vertical size of the display image H-phase To adjust the horizontal position of the display image H-size To adjust the horizontal size of the display image Pincusion To adjust the bowing of the display image size Trap
Section 4 POWER MANAGEMENT POWER MANAGEMENT FUNCTION The Power Management function, which is controllable through the required software, provides four distinct power states: DISPLAY POWER MANAGEMENT SIGNALING (DPMS) Mode Function On Normal operation; screen stays on. Power LED is green. Standby Screen blanks after preset idle time. Power LED of Display is Yellow. Suspend Some electronic circuits go off after a preset idle time. Power LED is Yellow.
Section 5 TROUBLESHOOTING In the event that you experience trouble with your Display, check the following items before contacting Vartech Systems. The most common problems usually involve an incorrectly configured Video Card or an incorrect connection from the Video Card to the Display. Do not exceed the maximum refresh rate recommended for the display. TROUBLESHOOTING GUIDE Problem Troubleshooting Tips No image on display screen 1.
Section 7 MOUNTING INSTRUCTIONS Mechanical Drawings Model Description Page(s) VT20A-C 20” Chassis Mount Mechanical Drawing VT20A-CH 20” Honeywell Configured Chassis Mount Mechanical Drawing VT20A-CY 20” Yokogawa Configured Chassis Mount Mechanical Drawing VT20A-R 20” Rack Mount Mechanical Drawing 14 VT20A-RH 20” Honeywell Configured Rack Mount Mechanical Drawing 15 VT20A-M 20” Tabletop Drawing 11-12 13 16-17 -1020” Slow Scan User Guide 150-082
Section 7 SPECIFICATIONS ENGINEERING SPECIFICATIONS Size 20” Resolution Capabilities 20A-C, 20A-CY, 20A-R, 20A-M VGA to SVGA 20A-CH, 20A-RH CGA/EGA to SVGA Active Display Area 20A-C, 20A-CH, 20A-CY, 20A-R, 20A-RH 15.39” x 11.42” / 390.91mm x 290.07mm 20A-M 14.9” x 10.7” / 378.46mm x 271.78mm Phosphor Medium Short P22 Deflection Angle 90º Power Source 120 VAC 60Hz/220 VAC 50Hz (auto switching) 2.0A at AC 120V 60Hz | 1.
VARTECH SYSTEMS INC. HEADQUARTERS 11529 Sun Belt Ct. Baton Rouge, Louisiana 70809 Toll-Free: 800.223.8050 International Phone: 001.225.298.0300 Fax: 225.297.2440 E-mail: sales@vartechsystems.com www.vartechsystems.com 20” Slow Scan User Guide 150-082-004 4.27.
