Develop D1531iD, Service Manual

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FrameMaker Ver5.5E(PC) Di152/Di183 MECHANICAL/ELECTRICAL
01.09.05
M-40
16. IMAGE TRANSFER AND PAPER SEPARATION SEC-
TION
✽
Image Transfer
• A positive charge is applied to the Image Transfer Roller to transfer the toner image
formed on the surface of the PC Drum onto the paper.
• The charge applied to the Image Transfer Roller is varied according to the following con-
ditions to ensure that image transfer efficiency is stabilized.
Paper Type: The amount of charge is made less for OHP transparencies.
Paper width: The greater the paper width, the more the amount of charge.
B/W ratio of the image: The higher the B/W ratio, the more the amount of charge.
• A negative charge is applied to the Image Transfer Roller to return toner sticking to the
Image Transfer Roller to the PC Drum. It is performed in the following timings:
• A copy cycle is started and completed, The Power Switch is turned ON, A misfeed or a
malfunction is reset.
✽
Paper Separation
• The PC Drum Paper Separator Fingers mechanically separate paper from the surface of
the PC Drum to ensure good and positive paper separation.
• The Charge Neutralizing Plate is used to neutralize any charge left on the paper, to which
image has been transferred, thereby preventing discharge noise that occurs when paper
is separated.
Elevtrical Component Control Signal ON OFF Wiring Diagram
HV1 PWB-A PJ8A-8 L H 6-C
4021M037AA
PC Drum
PC Drum Paper Separator Fingers
Image Transfer Roller
Charge Neutralizing Plate