Apple TechStep User's Guide

Apple TechStep is a hand-held tool that tests Apple products via the products' external interface ports. Driven by a Motorola MC68HC11 8-bit single-chip microcontroller, Apple TechStep displays test options and results on a 4-line-by-16-character LCD display. A 15-key keypad allows the technician to select tests and test options. Apple TechStep runs on an AC adapter or a standard 9-volt battery.

Slide-in ROM packs contain the software for specific computer and peripheral tests. This modular design means that you can easily upgrade Apple TechStep. As Apple releases new products, Apple Service will periodically release additional ROM packs to support the new products. In addition, a detachable port pack allows you to easily upgrade Apple TechStep to accommodate new interface port connections. The current port pack contains the port connections necessary to diagnose most Macintosh computers and Apple SCSI hard disk drives: two Apple Desktop BusTM (ADB) ports, two mini DIN-8 serial ports, one SCSI port, and one stereo audio port.

Apple TechStep logs test results and allow you to save them in the ROM pack or send them to a Macintosh computer for printing or saving.​