IBM 4820, System Reference Manual

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Chapter 14. System diagnostics and pinout connections
The 4820 SurePoint Solution models 4WT and 4GT connect through USB to the IBM
Point of Sale system unit. This section describes diagnostic information and pinout
connections for models 4WT and 4GT.
Using the MicroTouch TouchWare
This section describes how to calibrate the touchscreen and customize the touch
response.
Locating the touchscreen controller information
The touchscreen controller information window provides information about the type,
firmware version, and status of your touchscreen. Locate the controller by selecting the
Hardware tab from the TouchWare.
Controller type
The Controller Type field displays the model name of your touchscreen controller.
Firmware version
The Firmware Version field displays the revision number of the firmware in your
TouchWare controller.
Touchscreen status
The Touchscreen Status field provides valuable information about whether the
touchscreen hardware is operating properly. Table 14-1 lists the possible messages that
are displayed in the Status field:
Table 14-1. Touchscreen status messages
Message Definition Recommended Action
OK Touchscreen found and
operational
None
A/D Error
Touchscreen hardware error
Replace unit
ASIC Error
Hardware Error
PWM
NOVRAM Error Checksum error in NOVRAM,
using defaults
random access memory (RAM)
Error
Checksum error in read-only
memory (ROM)
Touchscreen Not Found TouchWare was unable to
communicate with the
touchscreen
Check that all cables for
correctly connected.
© Copyright IBM Corp. 1999, 2003
14-1