Jensen JMC-1000 - Manual (Page 28)

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Use only well-known brands of tape. Avoid use of C-120 cassettes.
Furthermore, do not expose cassettes to direct sunlight, dust or oil, and do not touch
the tape surfaces.
HEAD CLEANING
The tape heads, pinch roller and capstan require periodic cleaning. This removes
particles of the metal oxide coating that wear off the tape and accumulate on these
parts and impair performance.Switch off the power, press the Stop/Eject key to
open the cassettedoor, and press the Play key. Clean the tape heads, pinch roller
and capstan with a soft cloth or cotton pad dampened in isopropyl alcohol or special
tape head cleaner.
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If the cassette feels tight while performing operation
shown see Fig. 2 , the tape may be jamming due to
ridges formed in the winding of the tape visible
through the center window . These may be removed, in
most cases, by fast winding of the cassette from one
end to the other and back again.
Fig. 2
Record/Play
Erase head Head Capstan Pinch Roller
Play Head Capstan Pinch Roller
Check that there are no loose layers of tape visible
through the cassette center window (see Fig. 1).
Take up anyloose layers, using a pencil or hexagonal
barrelled ballpoint pen, before inserting the cassette
into the machine (see Fig. 2).