Konica Minolta BIZHUB 750 Service Manual page 88

17. VERTICAL CONVEYANCE SECTION
D. Vertical conveyance of the tray 3 paper
(1) Conveyance of small size paper
The vertical conveyance clutch /2 (CL12) turns ON [2] a specified period of time after a print start signal [1] is
sent. In this manner, CL12 transmits the drive force of the paper feed motor (M1) to the vertical conveyance
roller /2. Paper sent out from the pre-registration roller of the tray 3 is conveyed to the vertical conveyance roller
/1 by the vertical conveyance roller /2 after passing through the vertical conveyance sensor /3 (PS27). When the
vertical conveyance sensor /2 (PS26) detects the leading edge of paper and turns ON [3], the vertical convey-
ance clutch /1 (CL11) turns ON to transmit the drive force of M1 to the vertical conveyance roller /1. In this way,
the paper is conveyed from the vertical conveyance roller /1 to the loop roller. When the registration sensor
(PS44) detects the leading edge of the paper and turns ON [5], CL11 turns OFF a specified period of time after
that to complete the vertical conveyance [4] of the 1st sheet of paper.
While in the paper feed of the 2nd sheet and the succeeding sheets of paper, CL12 turns OFF at once when
PS26 turns ON and stops once at the vertical conveyance section. And then, a specified period of time after a
drum ready signal [6] is sent, CL11 and CL12 turn ON [7] to convey the paper to the loop roller.
Paper feed motor (M1)
Vertical conveyance clutch /1 (CL11)
Vertical conveyance clutch /2 (CL12)
Paper feed sensor /3 (PS13)
Vertical conveyance sensor /3 (PS27)
Vertical conveyance sensor /2 (PS26)
Registration sensor (PS44)
[1] Print start signal
[2] Rotation of the vertical conveyance roller /2
[3] Detection of the leading edge of the 1st
sheet of paper
[4] Rotation of the vertical conveyance roller /1
for the 1st sheet of paper
[5] Detection of the leading edge of the 1st
sheet of paper
62
[1] [2]
[4] [6]
[3] [5]
Theory of Operation Ver1.0 Aug.2005
[7] [8]
[9]
[6] Drum ready signal
[7] Start of the vertical conveyance of the 2nd
sheet of paper
[8] Rotation of the vertical conveyance roller /1
for the 2nd sheet of paper
[9] Detection of the leading edge of the 2nd
sheet of paper
57aat2c053na