Transfer Roller Bias - Ricoh A172 Service Manual

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8.2 TRANSFER ROLLER BIAS

The transfer roller bias is determined by the output of the humidity sensor. It

is divided into five humidity ranges by four thresholds, to compensate for

changes in the humidity of surrounding areas to maintain constant copy

The threshold is divided more towards the low humidity side, resulting in

more sensitivity at the low humidity end. This enables more accurate shift of

the transfer bias with small changes in the environment.

Also, the transfer roller bias is changed for each copy mode and the kind of

copy paper currently used.

NOTE: All values shown on this page are in volts D.C.. values shown

using SP mode <1> SP adjustments, pg 7, are in a data format.

Transfer Roller Bias (Normal Humidity)