Alpine CDA-7876RB - Manual (Page 6)

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Tape Slack
Check and make sure any slack in the tape is taken up
before inserting the tape into the unit. A loose tape can get
caught in the mechanism and cause damage to the unit
and the tape itself. Tighten the tape by inserting a pencil
or a similar instrument into the spindle hole and turn until
all the slack has been taken up.
Excessively Thin Tape
C-120 type cassette tapes are not recommended for use in
automobile tape players.
Precision Tape Mechanism
Prevent any foreign objects from entering the cassette
opening as the precision mechanism and tape head may be
damaged.
Never play dirty or dusty tapes – they can damage the tape
head.
Tape Head Cleaning
Periodic cleaning (approximately every 20 hours of use)
of the tape head with a wet type head-cleaning cassette
tape (available at audio stores) is necessary for best
performance.
Fuse Replacement
When replacing the fuse(s), the replacement must be of
the same amperage as shown on the fuse holder. If the
fuse blows more than once, carefully check all electrical
connections for shorted circuitry. Also have your vehicle's
voltage regulator checked.