User's Manual

Chapter 1: Introduction
Scanners
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Psion Teklogix 7535 G2 Hand-Held Computer Service Manual
On disassembled units, the housings may be distinguished by a label attached to the inside of the housing:
Figure 1.2 Location Of Housing Identification Label
1.4.4 Scanners
1.4.4.1 Scanner Control Services
This top level software service is responsible for supporting a variety of Physical Scan Drivers (PSDs),
and presenting an API to applications. It receives decoded scan data from the drivers, performs any
configured translations, and delivers the data to the appropriate application(s).
1.4.4.2 Non-decoded Laser Scanners
These scanners present raw data to the terminal. Internal and external non-decoded laser scanners are
controlled by the main processor. Activation of the scanner trigger(s) or the keyboard scan button(s)
causes the main processor to initiate a scan with the appropriate scanner. The peripheral controller
acquires the raw scanner data and feeds it to the main processor.
The non-decoded scan driver is responsible for receiving this data from the peripheral controller and
decoding it before passing it to the Scan Control Service, which performs any configured translations and
delivers the data to the appropriate application(s).
1.4.4.3 Decoded Laser Scanners
These scanners process their raw data themselves, presenting formatted data to the terminal. Both 1D and
2D decoded laser scanners are supported by the 7535 G2. The scanners will be connected to one of the
serial ports and controlled by the main processor. Activation of the scanner trigger(s) or the keyboard
scan button(s) will initiate a scan with the appropriate scanner. The decoded scan driver is responsible for
receiving scan data and passing it to the Scan Control Service.
1.4.4.4 Imaging Scanners
The 7535 G2 can support an imaging scanner; both internal and external imaging scanners are supported.
Psion Teklogix provides a driver for this scanner.
Housing Identification Label