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CARE AND MAINTENANCE
Your Optimus Concertmate 690 Portable Electronic Keyboard is an example of su-
perior design and craftsmanship. The following suggestions will help you care for the
Concertmate 690 so you can enjoy it for years.
Keep the Concertmate 690 dry. If it gets wet, wipe it dry immediately.
Liquids can contain minerals that corrode electronic circuits.
Use and store the Concertmate 690 only in normal temperature envi-
ronments. Temperature extremes can shorten the life of electronic
devices and distort or melt plastic parts.
Handle the Concertmate 690 gently and carefully. Dropping it can
damage circuit boards and cases and can cause the Concertmate
690 to work improperly.
Keep the Concertmate 690 away from dust and dirt, which can cause
premature wear of parts.
Wipe the Concertmate 690 with a damp cloth occasionally to keep it
looking new. Do not use harsh chemicals, cleaning solvents, or
strong detergents to clean your Concertmate 690.
Modifying or tampering with the Concertmate 690’s internal components can cause
a malfunction, invalidate its warranty, and void your FCC authorization to operate it.
If your Concertmate 690 is not performing as it should, take it to your local Ra-
dioShack store for assistance.
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