Ricoh FT8680 Service Manual page 145

31 July 1995 ARDF
16.11 ORIGINAL INVERTER MECHANISM
[B]
[C] [A]
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[F]
[G]
[E]
[D]
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When the inverter signal is received from the copier, the belt motor (drives
transport belt [A]) and the inverter motor (drives inverter rollers [B] and exit
rollers [C]) start rotating.
Simultaneously, the inverter gate solenoid turns on to open the upper inverter
gate [D] and lower inverter gate [E].
The travel distance inside the inverter loop is approximately 200 mm. When
an original exceeding A4/LT sideways is used, the original leading and
trailing edges will overlap.
When 10 pulses from the inverter motor encoder are counted after the
inverter entrance sensor [F] detects the leading edge of the original, the belt
motor starts reversing.
After the inverter registration sensor [G] detects the original leading edge, the
belt motor pulses are counted to determine the timing for the belt motor to
stop.
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