Konica Minolta bizhub 500 Service Manual page 110

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Theory of Operation Ver1.0 Feb.2006

B. Reverse control

While in the double sided print, when the fusing exit sensor (PS3) detects the leading edge of paper of which the

printing of the back side has been completed and turns ON [1], the reverse solenoid (SD3) turns ON to switch

the reverse gate a specified period of time after the registration clutch (CL1) turns ON for back side printing. In

this manner, the paper is conveyed to the reverse section. A specified period of time after the reverse sensor

(PS27) detects the leading edge of paper and turns ON [2], the reverse motor (M6) rotates in the normal direc-

tion [3] and the reverse roller conveys the paper to the outside of the main body. And then, a specified period of

time after PS3 detects the trailing edge of the paper and turns OFF [4], SD3 turns OFF [5] to bring the reverse

gate back to its original position. And when PS27 detects the trailing edge of the paper and turns OFF [6], the

rotation of M6 is switched [7] from the normal rotation to the reverse rotation and the reverse roller sends the

paper back to the inside of the main body to convey it to ADU. In this manner, the paper is turned over.

Reverse motor (M6)

Reverse solenoid (SD3)

Fusing exit sensor (PS3)

Reverse sensor (PS27)

Switchover of the reverse gate

Detection of the leading edge of paper

Normal rotation of the reverse roller ON

Detection of the trailing edge of paper

19. REVERSE/EXIT SECTION

Return to the reverse gate

Detection of the trailing edge of paper

Switchover of the reverse roller from the

normal rotation to the reverse rotation

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