Gestetner G060 Service Manual page 265

DEVELOPMENT
6.5.4 DEVELOPMENT BIAS
[B]
[A]
G060D309.WMF
The high voltage supply board – C, B [A] supplies development bias to the
development roller via a receptacle [B] at the rear of each development unit.
There are both ac and dc bias voltages. The ac bias improves toner transfer to the
drum.
The machine automatically controls the dc bias, if automatic process control is
enabled (i.e., if SP3-125-1 is set to 0). However, if process control is switched off,
(i.e., if SP3-125-1 is set to 1), the dc bias is the value stored in SP2-201-1 to -9 (do
not adjust in the field unless advised to do so).
The ac bias cannot be adjusted.
6.5.5 DEVELOPMENT UNIT DETECTION
This is the same as PCU detection. See "Photoconductor Unit – PCU Detection'.
SM 6-35 G060