Introduction - Radio Shack TRS-80 PT-210 Service Manual

Introduction
Model PT-210 is a Portable Data Terminal that combines a thermal printer, a keyboard, and an acoustic
coupler. Electronic circuits are used for its control; its main control comes from a one-chip microcomputer
(hereinafter abbreviated as pCPU).
Separate units are provided for different functions. Pulse motors and solenoid are used as drive sources
for mechanicals. Simplification is achieved by minimizing the number of mechanical parts, Accordingly, the
number of points which require adjustment is extremely small and maintenance is easy.
Other units also incorporate electronics. Electronic circuits are simplified for improving reliability and
stability, and the number of parts is minimized.