Operation; Loop Control - Konica Minolta BIZHUB 750 Service Manual

18. REGISTRATION SECTION

18.3 Operation

18.3.1

Loop control

A. Registration path
When paper supplied from the trays 1 to 4 [2], LU [1], the bypass tray [14] and ADU [5] hits against the registra-
tion roller [7], a loop [12] is formed until the roller provided just in front of the registration roller on each convey-
ance path turns OFF. And a paper skew is adjusted by this loop.
The rollers provided just in front of the registration rollers on each of the conveyance paths are as shown below:
• Trays 1 to 4: Loop roller [3]
• LU: Loop roller [3]
• Bypass tray: Feed roller [13] for bypass feed
• ADU: ADU pre-registration roller [4]
Each of these rollers is driven by the loop motor (M6) and the paper loop is controlled by the registration sensor
(PS44) [6] provided just in front of M6 and the registration roller.
[9]
[8]
[1] LU paper conveyance path
[2] Trays 1 to 4 paper conveyance path
[3] Loop roller
[4] ADU pre-registration roller
[5] ADU paper conveyance path
[6] Registration sensor (PS44)
[7] Registration roller
66
[10] [11]
[7] [6]
[5]
Theory of Operation Ver1.0 Aug.2005
[12] [13]
[4] [3] [2]
[8] Pre-transfer roller /Lw
[9] Drum
[10] Pre-transfer roller /Up
[11] Paper edge sensor (PS43)
[12] Loop
[13] Feed roller for the bypass tray
[14] Bypass tray paper conveyance path
[14]
[1]
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