Transfer Roller Cleaning - Gestetner B130 Service Manual

6.21.1 TRANSFER ROLLER CLEANING

Toner may transfer to the roller surface following a paper jam or if the paper is
smaller than the image. Periodic cleaning of the roller is required to prevent this
toner from migrating back to the rear of new printouts.
The machine cleans the roller at the following times:
• After initial power on.
• After clearing of a copy jam
• At the end of a job, if at least 10 sheet have been printed since the last
cleaning
The high voltage supply unit first supplies a negative cleaning current (about
–4 µA) to the transfer roller, causing negatively charged toner on the roller to move
back to the drum. It then applies a positive cleaning current (+5 µA) to the roller,
causing any positively charged toner to migrate back to the drum.
The cleaning current can be adjusted using SP2-301-4.
SM
CÓPIA NÃO CONTROLADA
IMAGE TRANSFER CURRENT (B129/B130/B168/B169)
6-55
CÓPIA NÃO CONTROLADA
B129 Series/B044 Series