Canon iR4570 Series Service Manual page 229

adjustment variable resistor. Contact with the PCB
can change the adjustment setting.)
2) Open the wire saddle [1], and disconnect the
connector [2].
F-6-13
3) Remove the screw [1], and detach the fixing [2].
F-6-14
4) Lift the front of the laser unit [1], and slide it to the
front.
F-6-15
When sliding out the laser scanner unit, be sure to take
care not to touch the PCB mounted to the laser scanner
unit. (The PCB is equipped with a laser scanner
intensity adjustment variable resistor, and contact
with the PCB can change the adjustment setting.)
Chapter 6
6-13