Chapter 1: Introduction
Power Management
Tether ID
The 7535 G2 can identify a device connected to the tether port by sensing an identification resistor within the connected cable. It then configures the port appropriately for the device and enables power to the port.
See The Tether Port in Appendix B.
1.4.12 Power Management
The 7535 G2 is powered by a lithium-ion rechargeable battery pack. The 7535 G2 can be powered from external power when used with the AC adaptor. When the 7535 G2 is powered from the AC adaptor, it will also charge the battery pack.
An internal supercapacitor holds charge for up to ten minutes to preserve the contents of RAM while the
7535 G2’s battery is being changed.
1.5 The Portable Docking Module
The 7535 G2 can be connected to a Portable Docking Module (PDM). The model 7535 G2 terminal can be connected to the same model PDM as well.
USB Type-B (Client) Port
Docking Port
Serial Port
USB Type-A (Host) Port
DC Power Connector
Figure 1.5 The Ports Of The Portable Docking Module
12 Psion Teklogix 7535 G2 Hand-Held Computer Service Manual
Chapter 1: Introduction
The Portable Docking Module
The Portable Docking Module provides serial and USB ports. The PDM has the following ports:
• Serial port.
This 9-pin D-connector accepts a null-modem serial cable which connects to an external development machine.
• USB type B port.
This port accepts a cable from a USB host (typically the development machine).
• USB type A port.
This port connects the 7535 G2 to other devices; the 7535 G2 serves as a USB host.
• Docking port.
This port connects to the 7535 G2.
• DC power connector.
Accepts 15 V DC from the power adaptor.
The Portable Docking Module is available as part of a kit from Psion Teklogix. This kit, Psion Teklogix part number 1030085, includes the following items:
• The Portable Docking Module (part number 1030083-001).
• A USB A-B cable (part number 9003322).
• A null modem cable (part number 9003659).
• An AC-to-DC power adaptor (part number 9007558).
• A power cord. (North American power cord: part number 9008693).
Psion Teklogix 7535 G2 Hand-Held Computer Service Manual 13
C
ONTROLS
2
2.1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
2.1.1 Identifying Hardware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
2.2 The Keyboard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
2.2.1 The Keyboard Backlight. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
2.3 The LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
2.3.1 Charge LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
2.3.2 Radio Traffic LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
2.3.3 Scan LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
2.3.4 User Application LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
2.4 The Beeper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
2.5 Turning The 7535 G2 On And Off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
2.6 Resetting The 7535 G2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Psion Teklogix 7535 G2 Hand-Held Computer Service Manual 15
