Ricoh PRIPORT VT 2000 Series Service Manual page 32

1.5 ELECTRICAL TIMING: VT2300/VT2500
(One Original):
2nd Drum Position Sensor
Master Making Key
1st Original Sensor
Fluorescent Lamp
ADF Drive Motor
Original Pressure Solenoid
2nd Original Sensor
Original Registration Sensor
Original Transport Motor
Master Feed Motor
Read Command
T1: When originals are inserted in the ADF unit, the 1st original sensor is
activated.
T2: When the Master Making key is pressed, the ADF drive motor starts
rotating and the pull-out roller and original feed roller feed the 1st
original. At the same time, the original pressure solenoid is energized
and the pressure plate presses the originals against the pull-out
rollers.
T3: When the 2nd original sensor detects the original, which is separated
by the separation blade and the original feed roller, the original
transport motor starts rotating and the transport rollers start rotating.
T4: One original is fed and when the original registration sensor detects
the original, the original transport motor stops the original position is
then as shown above.
T5: After the master eject process is finished and the second drum
position sensor is activated, the drum rotates 120 degrees more and
then the original transport motor turns on.
Insert Original
T1
T2
T3
T4:
Exposure Glass
T7
425 ms
Drum
Rotates
T4
120°
T5
Original
Original Stop Position
12 mm
Scanning Position
16 mm
2-5
28 February '91
Original Feeds 25 mm
T6
Original
Feeds 14 mm
Master Feeds 438 mm
Guide Plate