Ricoh FAX680MP Service Manual page 66

PRINTER ENGINE 31 March, 1997
[F]
H905R523.cdr
H905R524.cdr
4. Remove the encoder [F].
5. Put the encoder on a sheet of paper and drop alcohol all along it.
NOTE: 1) Do not wipe the encoder using cloth. If the slots on the encoder are
clogged with dust, the carriage may not move correctly.
6. Replace the encoder [F].
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