Development Bias - Ricoh D109 Service Training

S-C4L Training

Development Bias

Development roller High voltage supply board
Slide 43
Development Bias
Toner gets to the areas with the smallest negative charge.The drum has a large
negative charge (-900V). The latent image on the drum has a small negative
charge (-140 ± 50V).
The high voltage supply board gives a –600 V bias to the development roller.This
sends toner from the development roller to the latent image.
You can adjust the development bias with SP 2201 1
43