PRINTER
3000 304 995 - 01
i
PRINTER MODEL-L1
（
G191
）
SERVICE MANUAL
TECHNICAL DOCUMENT
6 September 2005
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1.2.5 TRANSFER AND SEPARATION
Overview
This machine uses a transfer roller [A], which touches the OPC drum [B] surface. A
constant current is applied to the transfer roller from the power supply unit board
[C]. The positively-biased transfer roller pulls negatively-charged toner off the drum.
The curvature of the drum, and the antistatic brush [D], help the paper [E] to drop
away from the drum.
Cleaning Mode
If a paper jam occurs during printing, toner may be transferred to the transfer roller
surface. To prevent this toner from transferring to the underside of the paper, the
transfer roller must be cleaned before the next printing run.
While the machine is in the cleaning mode, the Power Supply Unit board applies a
negative voltage to the transfer roller.
The negatively charged toner on the transfer roller is then transferred back to the
drum.
The machine goes through the cleaning mode at the following times.
•
At power-up: The process starts when the fusing temperature reaches the
standby temperature.
•
When the cover is opened and then closed during the printing process.
•
After a printer jam has been cleared.
G182D104.WMF
[A]
[B]
[C]
[D]
[E]