Ricoh FT7770 Service Manual page 45

30 April, '89
3. Solenoids
Cleaning (SOL-1)
Duplex Bottom Plate
(SOL-8)
Fork Gate (SOL-7)
Inverter Gate (SOL-4)
Inverter Roller (SOL-6)
Junction Gate (SOL-5)
Knocking (SOL-3)
Pick-off (SOL-2)
Return Pinch Roller (SOL-9) 135
4. Switches
Exposure (SW-10)
Humidity (SW-5)
Left Door Safety (SW-11) 2
Lower Tray Button (SW-9) 76
Main (SW-1)
Paper Application (SW-7) 53
Right Door Safety (SW-3) 6
SC Reset (SW-4)
Image Density (SW-12) 56
Top Unit Safety (SW-2) 1
Tray Auto-shift (SW-6) 52
Upper Tray Button (SW-8) 78
130 Brings the cleaning blade into contact
with the drum.
Raises and lowers the duplex bottom plate.
40
51 Varies the paper path in the duplex unit
depending on paper size.
88 Directs copies between the inverter guide
plates. Energizes for copy face down and
duplex copies.
Separates the up and down inverter
87
rollers. Energizes for copy face down and
duplex copies.
89 Directs copies to the duplex tray. Ener-
gizes for duplex and image overlay copies.
Vibrates the cover of the development unit
105
to prevent toner build up.
34 Brings the pick-off pawls into contact
with the drum.
Brings the return pinch rollers into
contact with the paper, reversing the
feed direction of the paper for face
down copies and duplex copies.
55 Changes the output of the lamp regulator.
54 Turns on the paper tray heaters.
De-energizes the cleaning solenoid and
main motor when the left door is open.
Lowers the lower tray bottom plate.
20 Supplies power to the copier.
For special paper (such as transparencies
or tracing paper.)
Increases transfer potential and lowers
separation bias potential.
Removes all power to electrical components
when the right door is open.
58 Press to reset the machine when it is in a
service call condition.
Shifts the auto ID sensor bias level,
which causes a change in toner density.
Removes all power to electrical components
when the top unit is up.
Selects automatic paper tray shift. The
copier shifts to any other tray holding
the same size paper when the tray in use
runs out of paper.
Lowers the upper tray bottom plate.
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