User's Manual

Psion Teklogix 7535 G2 Hand-Held Computer Service Manual 5
Chapter 1: Introduction
7535 G2 Hardware Architecture
• Presence of heater.
• Revision and serial number of main logic board (‘MLB Rev’ and ‘MLB Serial’).
• Serial number of device.
• Presence and type of card in internal PCMCIA and Compact Flash slots (‘PCM/CF Slots’).
1.4 7535 G2 Hardware Architecture
1.4.2 Overview
The 7535 G2’s main processor is the Intel PXA255, which is the second generation of the StrongArm
processor (SA1110).
A smaller, low-power microcontroller, the “peripheral controller”, is used to control and monitor many
aspects of the 7535 G2’s hardware, including controlling system power, communicating with the smart
battery pack, handling communications with the keyboard controller, collecting raw non-decoded
scanner input, monitoring temperature, light, and other sensors.
There are also two PIC microcontrollers; one in the keyboard assembly scans the matrix keyboard and
controls the LEDs (see ), and the other drives the keyboard backlight.
1.4.3 Body Variants
The 7535 G2 may be ordered with or without a tether port, and with or without a handstrap or handgrip.
The handstrap and handgrip are also available as customer-installable options.
Part numbers for the assembled housings are as follows. These assemblies include window glass,
keypads, beeper boards, and tether-port flexes:
Table 1.1 Housing Part Numbers
Type Of Housing
Older
IP54 Part Number
36-Key
No
Touchscreen
No Tether Port 1001854
Tether Port 1001853
Touchscreen
4-Wire
No Tether Port 1001855
Tether Port 1001856
5-Wire
No Tether Port 1001852
Tether Port 1001851
58-Key
No
Touchscreen
No Tether Port 1001860
Tether Port 1001859
Touchscreen
4-Wire
No Tether Port 1001862
Tether Port 1001861
5-Wire
No Tether Port 1001858
Tether Port 1001857