Canon DADF-Q1, Service Manual

Page: 117 / 156

Chapter 4
4-7
Do not use a solvent (alcoholfamily or ketone family) to clean the prism face. It is made of acrylic resin, and contact with solvent can discolor it, adversely affecting
its operation.
1) Open the pickup assembly upper cover.
2) Open the registration guide, and put the blower brush between the separation stay and the separation guide to clean. (The one to the front is the separation
paper sensor, while the one at the rear is the skew paper sensor.)
F-4-18
F-4-19
4.2.4.9 Pre-Registration Roller Paper
0011-2672
Do not use a solvent (alcoholfamily
or ketone family) to clean the prism face. It is made of acrylic resin, and contact with solvent can discolor it, adversely affecting its operation.
1) Remove the reversing guide.
2) Clean the face of the prism behind the reversing guide.
F-4-20
3) Remove the registration sensor PCB.
4) Clean the two filter surfaces of the sensor.
Surface to clean
(back)
Surface to clean
(face)
Prism
Surface to clean
(back)