Symbol PTC-2124 User Manual page 38

Chapter 3 Configuring TN-3270/5250
1. Display screen
1. This 1/4 VGA, transflective, monochrome liquid crystal display (LCD) screen has 320 x 240 lines of resolution and features a
built-in backlight to enhance readability. The screen displays data entered into the PTC and may show prompts, error
messages, and other information.
2. Pressing the On/Off button turns on the PTC or wakes it from a reduced power state. If the PTC is awake, pressing On/Off
puts the unit into suspend mode.
3. If your PTC contains an optional expansion module (laser scanner), it will be attached to the PTC via the expansion module
connector. See Appendix E for the scanner expansion module connector pinouts. If your PTC does not have an expansion
module, the expansion module connector will be sealed with a blank expansion module cover. Figure 1 shows the PTC with
an attached laser scanner module.
4. The Backlight button turns the display's backlight on or off.
5. This LED indicates the status of the PTC. See Appendix C for an interpretation of the CPU LED codes.
6. The speaker, located behind this grill, can be used by your application program to warn you of problems or to prompt you
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Figure 1. The PTC-2124 (top view)
4. Backlight button 4. Backlight button
5. CPU LED
6. Speaker
7. Batt LED
8. Contrast button
9. Icon strip
3. Expansion module connector
2. On/Off button
10. Function button
PTC-2124 User's Guide