Develop QC 2235 Plus Service Manual page 55

QC 2235plus Theory of Operation Ver.1.0 Mar. 2004
C. ATDC window bias
• Since the optical ATDC Sensor is used for C, M, and Y, a bias is applied to the ATDC win-
dow to prevent toner from sticking to it. No bias is applied to the ATDC Sensor for Bk,
which is the magnetic type.
• The bias is applied from the bias terminal of the LED Unit by way of the mounting screw
of the ATDC window to the ATDC window.
ATDC Window Screw
2-25
Developing section
ATDC Bias
4036ma2509c0