Chapter 4. System Diagnostics And Scan Codes; Using The 4820 42T/4Fd Pos Terminal Service Diskette; Using The Osd Menu - IBM 4820 System Reference Manual

Chapter 4. System diagnostics and scan codes

This section describes the diagnostics.

Using the 4820 42T/4FD POS Terminal Service diskette

The service diskette is available from the support Web site. Before you begin
diagnostics, ensure your connections are as following:
v RS-232 touch connects to COM 1
v RS-232 MSR connects to COM 2
After you boot your system with the diskette, a menu appears that allows you to
calibrate the touch and test the MSR.

Using the OSD menu

The OSD menu allows you to adjust the display settings such as contrast, brightness,
clock phase, and image position.
To open the OSD menu, press and hold the minus (−) and plus (+) buttons at the same
time. The following menu appears:
Auto Adjust
Manual Adjust
Brightness
Contrast
Information
© Copyright IBM Corp. 1999, 2003
Auto Adjust
Manual Adjust
Brightness
Contrast
Information
Reset
______________________________
(+) Select
(-) Scroll
(+&-) Exit
Automatically adjusts the settings. Use this option when you install the display
and at other times when image quality degrades.
Allows you to regulate the clock, phase, and image position. See "Using
Manual Adjust" on page 4-2.
Allows you to regulate the display's brightness setting.
Allows you to regulate the display's contrast settings.
Provides the current screen resolution, the horizontal, and the vertical sync
signal frequencies.
4-1