System Overview; External View - Tandy 102 Service Manual

System Overview
Tandy 102 portable computer is a low cost version of the Radio Shack TRS-80 Model 100 Portable
Computer. The Tandy 102 is fully compatible with the Model 100 in its software so that both system
users can take advantage of the large number of programs available.
The Tandy 102 has the following applications programs in the standard ROM: BASIC, TEXT,
TELCOM, ADDRSS, SCHEDL and TELCOM.
External View
1 Keyboard : Can be used like the standard typewriter.
However, the Tandy 102 does have a few
speciatkeys. (See Appendix B of this manual for more details.)
2 LCD Screen : The Tandy 102 display has eight lines that allow 40 characters on each line.
3 Power Switch : Move this switch towards the front to turn the power on. To conserve the
batteries, the Tandy 102 automatically turns the power off if you do not use it for 10 minutes in
default setting.
4 Low Battery Indicator : Before the Tandy 102 is operational batteries become exhausted, this
indicator will illuminate.
5 Display Adjustment Dial: This control adjusts the contrast of the LCD display relative to the
viewing angle.
6 External Power Adapter Connector: Connect the appropriate and of Radio Shack's AC Power
Supply (Catalog Number 26-3804, optional/extra)
to this connector. Connect the other end of
the power supply to a standard AC wall-outlet or approved power strip.
1 Keyboard 2 LCD Screen 4 Low Battery
Indicator
11-1 11-1
1-1
N,
11-1
ZZ
6 External Power Adapter
Connector
5 Display Adjustment
Dial
3 Power Switch
Figure 1- 1. Front View
1-2