ricoh mp c6000

[teebee1234]

Belt speed sensors are under the rear edge of belt. There is a metal plate about 1x2 in. that pinches the belt to surface of the sensors. Remove the plate and lift up the belt to access them. Use alcohol on them (also the MUSIC sensors) to help alleviate toner sticking to the lenses.

[SteveF]

defo looks like colour line calibration or music sensors ...