Ricoh FT8880 Service Manual page 112

6 March 1992 BASIC OPERATION
[A]
[C]
[B]
[D]
[F]
[E]
[G]
The mark detection sensor [A] detects the reference line [D] and reads the
job sheet. The mark detection sensor is composed of 4 photosensors. The
sensor on the right [B] detects the reference line and reference marks [E],
and the other sensors [C] read the job sheet data.
The menu reader CPU monitors signals from the mark detection sensor and
measures the time between each reference mark. There are 25 reference
marks along the sheet edge. After the 25th reference mark is read, the job
sheet is fed out by the upper and lower transport rollers [F, G].
The operation panel status changes after the job sheet is read, and the job
sheet information is sent to the copier CPU.
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