Xerographics - Minolta Magicolor 3100 Series Service Manual

5.8 Xerographics

5.8.1 Major functions
M ROS ASSY
ROS ASSY (Raster Output Scanner Assembly) is an exposure unit to generate laser beams to form
electrostatic latent image on the drum surface.
In this manual, the ROS ASSY is referred to as ROS ASSY.
The ROS ASSY mainly consists of the following parts:
• LD ASSY
• Scanner ASSY
• SOS PWB
• Lens
• Mirror
• Window
M PHD ASSY (Imaging Unit)
PHD ASSY (Print Head Assembly) carries out a series of operation in the print process such as
charging, developing and transfer.
PHD ASSY mainly consists of the following parts.
• Drum (Y)• Developer (Y)
• Drum (M)• Developer (M)
• Drum (C)• Developer (C)
• Drum (K)• Developer (K)
• RTC (Y)• Refresher (Y)
• RTC (M)• Refresher (M)
• RTC (C)• Refresher (C)
• RTC (K)• Refresher (K)
• IDT 1 (2)• IDT 2
• IDT 1 cleaner (2)• IDT 2 Cleaner
M CHUTE REGI (Regi Clutch)
The CHUTE REGI is composed of the Regi Clutch, Regi Roll and Metal Roll.
Drive from the MAIN DRIVE ASSY is transmitted to the Regi Roll through the Regi Clutch. Feeds paper
from the tray, MSI and duplex path in the PHD ASSY direction. When the paper tip reaches the CHUTE
REGI, the CHUTE REGI has the paper make a loop until the Regi Roll starts rotating and correct the
skew (feeding the paper in inclined condition) of the tip of the paper.
M SENSOR PHOTO (Regi Sensor)
Detects that the paper tip has reached the CHUTE REGI.
(Paper present: Beam is received)
M OHP SENSOR ASSY
As plain paper scatters the radiated light, the OHP SENSOR ASSY can capture the reflected light to
detect the paper. The OHP paper scarcely scatters the radiated light, and therefore the OHP SENSOR
ASSY cannot capture the reflected light. Thus, whether the paper fed from MSI is plain paper or OHP
paper is judged.
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