Optimus 120-2113 - Manual (Page 17)

High-Power In-Dash AM/FM Stereo Cassette w/Auto Reverse
(120-2113) Care and Maintenance Faxback Doc. # 62494
Your Optimus High-Power in-Dash AM/FM Stereo Cassette with Auto-Reverse is
an example of superior design and craftsmanship. The following suggestions
will help you care for the stereo so you can enjoy it for years.
Keep the stereo dry. If it gets wet, wipe it dry immediately. Liquids
might contain minerals that can corrode the electronic circuits.
Handle the stereo gently and carefully. Dropping it can damage circuit
boards and cases and can cause the stereo to work improperly.
Keep the stereo away from dust and dirt, which can cause premature wear
of parts.
Wipe the stereo with a damp cloth occasionally to keep it looking new.
Do not use harsh chemicals, cleaning solvents, or strong detergents to
clean the stereo.
Modifying or tampering with the stereo's internal components can cause a
malfunction and might invalidate your stereo's warranty and void your FCC
authorization to operate it. If your stereo is not performing as it
should, take it to your local RadioShack store for assistance.
The FCC Wants You To Know
Your stereo might cause TV or radio interference even when it is operating
properly. To determine whether your stereo is causing the interference,
turn off your stereo. If the interference goes away, your stereo is
causing it. Try to eliminate the interference by:
Moving your stereo away from the receiver.
Contacting your local RadioShack store for help.
Cleaning The Tape-Handling Parts
Clean the tape head after about every 20 hours of playing time. Insert a
special head-cleaning cassette (such as Cat. No. 44-1202), and follow the
cleaning cassette's directions to clean the tape head.
Restoring Tape Tension And Sound Quality
After you play a cassette tape a few times, the tape might become tightly