Image Transfer; Pre-Transfer Lamp - Ricoh FT6645 Service Training Manual

5. IMAGE TRANSFER

5.1

PRE-TRANSFER LAMP

[A]
The pre-transfer lamp [A] located in the drum unit is used to prevent
incomplete toner transfer.
After the latent image is developed but before the image is transferred to the
copy paper, the drum surface is illuminated by the pre-transfer lamp. This
illumination reduces the negative potential on the drum surface charged by
the main charge corona and partially discharged by the exposure. This
makes image transfer easier.
The pre-transfer lamp is turned on and off by the charge power pack at the
same time as when the main motor turns on and off.
STM 2-59 FT6645/6655/6665