Canon GP405 Service Handbook page 151

<FUNCTION>
Level 3
SENS-INT Executes auto sensitivity adjustment for the RDF sensor
(initialization).
Execute this mode if you replaced the DADF controller
PCB, original tray paper sensor (S1), or registration sensor
(S3); further, if you have replaced the DADF controller
PCB, you will have to perform additional steps.
The specifics of this adjustment are the same as those made
using the DIP switch on the DADF controller PCB.
1) Remove the DADF controller cover, and find out the
2) Select the item, and press the OK key.
3) Check that the machine executes the mode and stops
UBLT-CLN Executes separation belt cleaning mode for DADF top
pick-up.
1) Select UBLT-CLN to highlight.
2) Moisten the center of paper with solvent, and place the
3) Press the OK key. The original will be fed to the
4) Press the OK key to stop the operation.
5) Open the feeder upper cover, and remove the paper;
DBLT-CLN Executes separation belt cleaning mode for DADF bottom
pick-up.
Same as <UBLT-CLN>.
Description
location of LED 1/2.
automatically.
Operation
paper on the original tray of the feeder.
middle, and the top pick-up separation belt will rotate
idly.
then, close the upper cover.
Operation
CHAPTER 4 SERVICE MODE
REf.
See Standards and
Adjustments in the
DADF Service
Manual.
FEEDER
4-83