Operation; Tray Lift Control - Konica Minolta bizhub 500 Service Manual

Theory of Operation Ver1.0 Feb.2006
5.2

Operation

5.2.1

Tray lift control

When the upper door is closed, a parallel pin for the up drive of the lift plate is pushed out to be coupled to the
coupling of the paper lift motor (M151). Closing the upper door also turn ON the upper door interlock switch
(MS151) to supply a 24V DC to the load of the drive system. In this way, M151 turns ON to bring up the lift plate.
When the lift plate goes up and the upper limit sensor (PS152) detects the upper surface of paper, M151 turns
OFF to stop the up drive of the lift plate. When PS152 turns OFF by the paper feed operation, M151 turns ON
again to keep on bringing up the lift plate until PS152 turns ON.
When the upper door is opened, the wire is pulled to release the coupling for the up drive of the lift plate. In this
way, the lift plate goes down up to the position in which a balance is kept between the weight of paper and the
spring tension.
[1] Feed roller
[2] Lift plate
[4] [1]
[3]
[3] Pick-up roller
[4] Upper limit sensor (PS152)
5. TRAY SECTION
[2]
16aat2c008na
9