Radio Shack TRS-80 PC-3 Owner's Manual page 209

CHAPTER 11 MAINTENANCE OF THE PC-3 POCKET COMPUTER
To insure trouble-free operation of your Radio Shack PC-3 Pocket Computers, we recommend the following:
*
Always handle the Pocket Computer carefully, as the liquid crystal display is made of glass.
* Keep the Computer in an area free from extreme temperature changes, moisture, or dust. During warm weather, vehicles
left in direct sunlight are subject to high temperature build up. Prolonged exposure to high temperature may cause damage
to your Computer.
* Use only a soft, dry cloth to clean the Computer. Do not use solvents, water, or wet cloths.
* To avoid battery leakage, remove the batteries when the Computer will not be in use for an extended period of time.
* If service is required, the Computer should only be returned to an authorized Radio Shack Service Center.
* If the Computer is subjected to strong static electricity or external noise, it may "hang up" (all keys become inoperative).
If this occurs, press the ALL RESET button while holding down any key. (See Troubleshooting.)
* Keep this manual for further reference.
(NOTE: For maintenance of the PC-3 Printer/Cassette Interface, please see Chapter 7.)
211