V599326/Rev. 02 June 2003 BarcoView Theodoor Sevenslaan 106 8500 Kortrijk, Belgium Phone: +32(0)56 23 32 44 Fax: +32(0)56 23 33 74 E-mail: sales.medical@barco.com http://www.barcoview.com BarcoView Inc 3059 Premiere Parkway Duluth, Georgia, 30097,USA Phone: +1 678 475 8000 Fax: +1 678 475 8100 MGD 521 M MGD 521 MKII Medical Greyscale Displays E-mail: sales.medical@barco.com http://www.barcoview.com BarcoView LTD 16F-1, Cheng Loong Plaza 33, Min Sheng Road Section 1, Pan Chiao, Taipei Hsien, Taiwan, R.O.
© 2003 BARCO nv. All rights reserved. Trademark information TrueGrey, MediCal, BarcoMed, and MeDis are registered trademarks of BARCO NV. Windows NT is a registered trademark of Microsoft Corporation.
MGD 521 M - MKII User's Guide 4
SAFETY INSTRUCTIONS Read the safety and operating instructions before operating the apparatus. Retain safety and operating instructions for future reference. Adhere to all warnings on the apparatus and in the operating instructions manual. Follow all instructions for operation and use. Regulations This apparatus conforms to: IEC601-1, UL2601-1, cUL2601-1, EN 60601-1 This apparatus is classified as Type B without Applied Part.
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CONTENTS 1. Introduction ..................................................................................................... 9 1.1 Overview .................................................................................................. 9 Resolution and bandwidths ....................................................................... 9 The memory system .................................................................................. 9 Image conformity and consistency .................................
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1. INTRODUCTION 1.1 Overview Resolution and bandwidths The BARCO MGD 521 M and MGD 521 MKII displays are ultra-high resolution, grayscale portrait displays. Their outstanding visual performance, combining a 5 MegaPixel resolution with a very high brightness, makes them ideal for diagnostic imaging and many other medical and scientific applications. The displays are compatible with any AC power system worldwide and automatically synchronise to a wide range of sync frequencies.
adjust and check BARCOs medical displays. A lot of adjustments can also be done on the monitor itself, by means of an extensive on-screen menu system, accessible from the rear panel controls. Power saving system The MGD 521 displays are equipped with a power saving system. When left idle for a certain time, the computer, connected to the display, will power down the display in several steps. The power saving system can be switched on or off during the installation or adjustment of the display.
1.3 About the manuals This guide is meant for people who want to install and use the MGD 521 displays, as well as people who need to install and adjust the displays. Chapter 4, Adjustments, is meant for this second category only, because it describes actions and procedures that require a technical skill to be performed properly. The use of the software MediCal is described in the MediCal Users Manual.
2. INSTALLATION 2.1 Precautions Keep your original packaging. It is designed for this display and is the ideal protection during transport. Do not lift the display all by yourself to avoid injury. Avoid reflections in the picture tube to reduce eye strain. Place the display on a strong and stable table or desk if used as desktop display. Keep the display away from heat sources and provide enough ventilation in case it is built in a rack or console.
2.3 Controls and connectors {1} Optical sensor plug {2} Ambient Light Compensation (ALC) sensor (optional) {3} Green power LED {4} Control knob, combination of a push button and a turning knob. The control knob is used for switching the power on/off, and selecting and performing functions in the OSD (onscreen display) menu. {5} Remote (RS-232) output {6} Remote (RS-232) input {7} Video input 5 6 7 8 9 {8} Horizontal / composite sync. input {9} Vertical sync.
2.4 Signal connection a) Connection of video signals ! The connected equipment must comply to all relevant safety demands. Important: The use of low-quality video cables can distort the video signal and influence diagnosis. 1. Check the impedance of the imaging board that produces the video signals you want to connect. It must be 50 or 75 Ohm (just like the input of the display). If not, the quality of the images on the display will be inferior. 2.
b) Connection of data signals The display can be controlled remotely by a computer through the serial data bus. A typical example of this, is the MediCal software that controls the display. MediCal runs on a PC that is connected through the serial data bus. This PC is not necessarily the same computer as the one that produces the video signals. Unlike the video signals, it is possible to daisy-chain the serial data bus. This means you can control different displays from one PC.
d) Connection of power 1. Power cord: Utilize a UL-listed detachable power cord, 3-wire, type SJ or equivalent, 18 AWG min., rated 300 V min., provided with a hospital-grade type plug 5-15P configuration for 120V application, or 6-15P for 240V application. 2. Plug one end of the power cord into the rear of the display (connector LINE {10}). Plug the other end into a grounded AC power outlet. The display automatically adapts to the voltage. The voltage range is: 100-240 VAC +/- 10%. 2.
Important considerations The best environment for diagnostic imaging is one with controlled and dimmed ambient light. The human eye's sensitivity depends on the ambient light strength. It is most sensitive to small contrast changes (or subtle image details) at limited ambient light levels. The best ambient light level, expressed in Lux, depends on the application. An office illumination typically requires 500 Lux. A dimmed environment, like a softcopy room, requires less than 100 Lux.
3. OPERATION: USER CONTROLS Important: The best way to adjust and control the display is by using MediCal, which displays the ideal test patterns for correct adjustment. However, in case you do not dispose of MediCal, you can control and adjust the display by means of the built-in On-Screen Display (OSD). 3.1 Switching on / off Power on/off Press the Power button {11} on the rear panel to switch on the display. The green LED at the front is off when the display is operating.
3.2 Contrast and brightness control Contrast and brightness can be controlled through the OSD menus. To activate the OSD Turn the control knob {4} from left to right or from right to left. As a result, the OSD main menu appears. Note: The control knob should turn over at least 30 degrees before the OSD becomes visible. MAIN MENU - Contrast CAL Brightness CAL Status information Settings Adjustments Exit The OSD main menu The main menu indicates the current setting for contrast and brightness.
To control contrast manually 1 Turn the control knob to select Contrast in the OSD main menu. 2 Press the control knob shortly. The contrast control menu appears. 3 In the contrast control menu, select Manual contrast adjustment and press the control knob shortly. The contrast scroll bar appears. 4 Turn the control knob until you have reached the desired contrast. 5 Press the control knob shortly or wait a few seconds to return to the contrast control menu.
4 Turn the control knob until you have reached the desired brightness. 5 Press the control knob shortly or wait a few seconds to return to the brightness control menu. 6 In the brightness control menu, select Exit and press the control knob shortly to return to the main menu. Alternatively, you can just wait a few seconds, and the OSD returns to the previous menu automatically. 3.3 Viewing Status information You can view the status and actual settings of the display.
Software Version: The internal software version. Run time: The total operating time since production, including burn-in time. White level: The displays white level or light output after calibration, in calibrated position. Activity timeout : This is the time, expressed in seconds, before the display interrupts the data communication with the computer (e.g. during a computer session with MediCal) if the computer does not respond anymore.
4. ADVANCED SETTINGS AND ADJUSTMENTS (FOR SERVICE STAFF ONLY) Important: The functions and controls described in this chapter can have a serious impact on the performance of the display. They should be touched by trained service staff only! 4.
Explanation of the Settings menu items LUC: LUC is short for Luminance Uniformity Control. When switched on, the internal waveform processor will modulate the gain of the video amplifier so that the luminance is equal all over the screen (within a tolerance of +/- 5%). The LUC system can be calibrated in the Adjustments menu (see further). ALC (optional): ALC is short for Ambient Light Compensation.
4.2 Adjustments a) How to make the adjustments 1 Turn the control knob at the rear from left to right or from right to left to activate the On-Screen Display (OSD) main menu. 2 In the main menu, turn the control knob to select Adjustments. 3 Press the control knob for a few seconds. The Adjustments menu appears. Note: If you press only shortly, the message "Service protected" appears. 4 Turn the control knob to select the category of adjustments you want to make.
Width Horizontal position Height Vertical position Blanking - Blanking left Blanking - Blanking right Blanking - Blanking top Advanced 26
Interlacing - Pre correction In most cases you do not need to change this adjustment. You may need to increase this adjustment only when the connected video and sync signal contains an abnormally big number of equalization pulses before the vertical sync (more than 8 lines), resulting in a phase error (geometry distortion) at the bottom of the image. Interlacing - Post correction In most cases you do not need to change this adjustment.
SH Compensation: SH Position With SH Compensation on, we advise to use the SH Position control instead of the Horizontal Position control in the Geometry menu.
Advanced geometry - Corner top right Advanced geometry - Corner bottom left Advanced geometry - Corner bottom right Advanced geometry - Linearity & S-correction Horizontal linearity Advanced geometry - Linearity & S-correction Horizontal S-corr Advanced geometry - Linearity & S-correction Vertical linearity Advanced 29
Advanced geometry - Linearity & S-correction Vertical S-corr Advanced geometry - Advanced bowing & skewing Horizontal bowing left Advanced geometry - Advanced bowing & skewing Horizontal bowing right Advanced geometry - Advanced bowing & skewing Horizontal skewing left Advanced geometry - Advanced bowing & skewing Horizontal skewing right Advanced 30
Focus Static focus Adjust Static focus to obtain an image as sharp as possible in the center. Focus zone You can adjust the focus in 25 independent zones. Turn the control knob to obtain an image as sharp as possible in the selected zone. Press the control knob to switch to the next zone. ALC (optional) Ambient Light Compensation (ALC) is an optional system that automatically adapts the display contrast and brightness level to the ambient light in the room.
Luminance uniformity This menu allows you to calibrate the display, including the Luminance Uniformity circuit. Proceed as follows: 1 Connect the X-Rite DTP92 sensor and apply the black shield (see chapter "Installation"). 2 Follow the instructions on the screen. Factory reset This function allows you to undo all adjustments you have made since the display left the factory. Select Go ahead to restore the factory settings. Select Exit to return to the previous menu without erasing the adjustments.
5. MAINTENANCE Picture tube The glass panel of the picture tube is handled with a special coating. Take care not to damage or scratch the coating. Clean the picture tube with a soft woolen or cotton cloth. The cloth should be moist, not wet! Use a watery solution or a mild commercial glass cleaning solution. Apply (e.g., spray) the solution on the cloth, not on the picture tube. Cabinet Clean the cabinet using a recognized cleaning product for medical equipment.
6. TROUBLESHOOTING There appears no image on the picture tube, the green LED at the front is out Check if the power cord is properly connected to the power outlet and to the display. Check if the power button is switched on. There appears no image, the green LED is on The display is switched in Stand-by, manually or by the automatic Power saving system. Press the control knob at the rear shortly.
APPENDIX A: BACKGROUND INFORMATION Luminance Uniformity Correction A characteristic (or limitation) of every picture tube (CRT) is that the luminance decreases towards the edge of the screen surface. The decrease is normally 20 to 30 %. This is caused by the shape of the picture tube. Inside the CRT, a socalled electron gun shoots an electron beam towards the front (the glass panel).
At last, the imaging board delivers no sync signals at all, and the micro-controller switches off all but one power supplies in the display. Only the micro-controller's own supply keeps on running, resulting in a very low power consumption of 5 W. If you start using the computer again, the imaging board switches on both sync signals, and the micro-controller switches on the display. The times after which the different steps of power management must become active, is set in the PC's display properties.
APPENDIX B: TECHNICAL SPECIFICATIONS Picture tube: Faceplate transmission: +/- 32% Faceplate type: ARC panel Image representation: portrait Phosphor: P45 (standard) or P104 (option for MGD 521 MKII only) Light output: (P45 phosphor) MGD 521: Calibrated: 300 Cd/m2 MGD 521M: Calibrated: 400 Cd/m2 Peak: 600 Cd/m2 Resolution: Max. adress. pixels: 2048 Max. adress.