Ricoh D146 Service Manual page 365

4. Image transfer cleaning unit (page 4-68 "Image Transfer Cleaning Unit")
5. Remove the tension fixing frames [A] and [B] (front side: black, rear side: gray).
6. Position the image transfer unit with the front side underneath.
7. Release the tension, and remove the belt.
SM 4-71 D146/D147/D148/D149/D150
Image Transfer Unit