Operation; Up/Down Control; Paper Feed Control - Konica Minolta BIZHUB 750 Service Manual

15. PAPER FEED SECTION (trays 3 and 4)

15.3 Operation

15.3.1

Up/down control

A. Up operation
The paper lift motors /3 (M18) and /4 (M19) cause the lift wires to be taken up by the pulley to raise the lift plate.
B. Down operation
When the tray is pulled out, the coupling shaft [2] of the tray is disengaged from the coupling gear [4] of the
paper lift motors /3 (M18) and /4 (M19) [3]. This brings up the lift plate [1] to release the drive force of the M16 or
M17 and the lift plate goes down by its own weight.
[1] Lift plate
[2] Coupling shaft
C. Operation timing
When the tray is set, the paper lift motors /3 (M18) and /4 (M19) turn ON to bring up the lift plate. When the lift
plate goes up and the upper most paper on the plate turns ON the upper limit sensors /3 (PS14) and /4 (PS20),
M18 and M19 turn OFF to stop the up operation.
While in the print operation, when PS14 and PS20 are turned OFF from ON by the paper feed operation, M18
and M19 turn on again to raise the lift plate. When PS14 and PS20 are turned ON again by this operation, M18
and M20 turn OFF to stop the up operation.
15.3.2

Paper feed control

See "14.3.2 Paper feed control."
52
[3] [4]
[2]
Theory of Operation Ver1.0 Aug.2005
[1]
[3] Paper lift motor /3 (M18), /4 (M19)
[4] Coupling gear
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