Canon GP405 Service Handbook page 14

CHAPTER 2 STANDARDS AND ADJUSTMENTS
4 Left/Right Registration (side paper deck)
1) Make a copy of the Test Sheet, and check to see if the left/right registration is 0 ±1.5 mm.
2) If it is not as indicated, slide out the compartment, and turn the two screws to adjust the position
of the latch plate of the deck open solenoid. (At this time, refer to the scale on the latch plate.)
Latch plate
Screws
Scale
Figure 2-7 (rear left of the compartment)
2-4