Image Transfer And Paper Separation; Overview; Transfer Roller Cleaning - Gestetner G056 Service Manual

PRINTING PROCESS

6.3.6 IMAGE TRANSFER AND PAPER SEPARATION

Overview

[A]: Drum
[B]: Development roller
[C]: Transfer roller
• This machine uses a transfer roller [C] to pull the toner from the drum onto the
paper.
• The high voltage supply applies a positive current (+18µA) to the transfer roller.
The current applied to the transfer roller can be adjusted with the printer engine
SP mode "Transfer set."
[D]: Transfer roller
[E]: Separation plate
[F]: High voltage supply
• The separation plate helps to separate paper from the drum.

Transfer Roller Cleaning

After a paper jam or when the wrong paper size was set, toner may transfer to the
back side of printouts. To prevent this, the machine automatically cleans the
transfer roller before the next print run.
During transfer roller cleaning, the high voltage supply applies a negative current
(-3µA) to the transfer roller.
The machine cleans the transfer roller under the following conditions.
• At power on
• During fusing unit warm-up
• Immediately after a jam has been cleared
• Any time the front cover is opened and closed
• After a job which is 10 pages or larger
G056/G058
[A]
[C]
[E]
[D]
6-14
[B]
G058D108.WMF
[F]
G058D703.WMF
SM