General Maintenance; Caring For The Touchscreen; Cleaning The 7535 - Psion Teklogix 7535 User Manual

Chapter 3: Getting To Know Your 7535

General Maintenance

3.12 General Maintenance

3.12.1 Caring For The Touchscreen

The top of the touchscreen is a thin, flexible polyester plastic sheet with a
conductive coating on the inside. The polyester can be permanently damaged by
harsh chemicals and is susceptible to abrasions and scratches. Using sharp objects
on the touchscreen can scratch or cut the plastic, or crack the internal conductive
coating.
The chemicals listed below must not come into contact with the touchscreen:
• mustard,
• sodium hydroxide,
• concentrated caustic solutions,
• benzyl alcohol, and
• concentrated miner acids.
If the touchscreen is used in harsh environments, consider applying a disposable
screen protector (PN 1010029). These covers reduce the clarity of the display
slightly but will dramatically extend the useful life of the touchscreen. When they
become scratched and abraded, they are easily removed and replaced.
Note: If the environment is excessively harsh, consider using a tempered glass
version of the 7535.

3.12.2 Cleaning The 7535

Important:
• Use only mild detergent or soapy water to clean the hand-held unit.
• Avoid abrasive cleaners, solvents or strong chemicals for cleaning. The
7535 has a plastic case that is susceptible to harsh chemicals. The plastic is
partially soluble in oils, mineral spirits and gasoline. The plastic slowly
decomposes in strong alkaline solutions.
• To clean ink marks from the keypad and touchscreen, use isopropyl
alcohol.
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Teklogix 7535 Hand-Held Computer User Manual
Do not immerse the unit in water. Dampen a soft cloth with mild
detergent to wipe the unit clean.