Gestetner B070 Service Manual page 639

After the image transfer is
completed, the charge on the
transfer belt holds the paper to the
transfer belt. After separating the
paper from the transfer belt, the
transfer belt is discharged by the
transfer belt drive roller [A].
The transfer power pack [B] inside
the transfer belt unit monitors the
current (I and I ) fed back from
1 2
the drive rollers at each end of the
transfer belt to adjust the transfer
current.
The power pack then adjusts "I
to keep the current through the
drum (I ) constant, even if the
3
paper, environmental conditions, or
transfer belt surface resistance
change.
The varistor [C] keeps the voltage
at the cleaning bias roller [D]
constant.
To apply a higher current to the
transfer belt without a higher
voltage, the bias brush [E] has been
incorporated near the nip between
drum and belt. This ensures that
enough transfer current is applied
for this machine, which has a higher
copy volume.
SM
CÓPIA NÃO CONTROLADA
IMAGE TRANSFER AND PAPER SEPARATION
[C]
t"
6-123
CÓPIA NÃO CONTROLADA
[D]
[B]
[A]
[E]
B070D509.WMF
B070D503.WMF
B070/B071