Canon iR105 finisher tray B keeps on lowering when printing or copying

[mafifulos]

Try tray sensor initial adjustment, see pdf attachment.Attachment 38030

Thank you for your reply sir, I'm slowly learning, here is the result after setting the switch according to the manual that you sent. it shows "F" after i set the switch, i havent even pressed the SW976, i tried pressing SW976 and no response just the "F" flickering on and off. I also tried pressing the buttons SW974 and SW975 but still no response. I already tried swapping the tray B sensor located in the middle of the tray from one of our machines, but no luck.
IMG_20171029_103421.jpg

[guitar9199]

You might be looking at a needing a Finisher Controller. Part # FG3-1875-060.

[Canuck]

There are a set of sensors that look across the surface of the tray..when the paper stack gets higher, it detects this and tray drops fractionally to adjust. The transmitters are on one side and the receivers are on the other. They are level with the process tray(tray that stacks and offsets before ejecting stack out). Blow them out. Also on the tray itself there is a circuit board that has photo interrupts on it. There are cut outs in the rail...these photo interrupts look for the cut out to know the tray's position. The screw that mounts the board comes loose. Blow out the sensors also...The F means your sensors are not initializing...focus on the sensors that look across the tray

[mafifulos]

You might be looking at a needing a Finisher Controller. Part # FG3-1875-060.

I'll take that as an option once i tried everything out sir, thank you for the information.

[mafifulos]

There are a set of sensors that look across the surface of the tray..when the paper stack gets higher, it detects this and tray drops fractionally to adjust. The transmitters are on one side and the receivers are on the other. They are level with the process tray(tray that stacks and offsets before ejecting stack out). Blow them out. Also on the tray itself there is a circuit board that has photo interrupts on it. There are cut outs in the rail...these photo interrupts look for the cut out to know the tray's position. The screw that mounts the board comes loose. Blow out the sensors also...The F means your sensors are not initializing...focus on the sensors that look across the tray

Thank you sir, I will try that and i will post the result. fingers crossed. thank you for the detailed info.

[spectraindo]

There are two sets of sensors that detect tray position and paper height, S4 for tray B and S5 for tray A.
Clean the sensors and make sensor auto adjustments.
TRAY SENSORS.pdf

[mafifulos]

Good Day, I am a noob technician on copier machines, can you please help me troubleshoot my problem a Canon iR105 copier machine, When i print, the finisher tray "B" lowers down automatically, even if i pull it up, it will go back down when i print or make copies. I have tried replacing the motor, sensors, almost everything that is inside the tray B from our other working canon iR105 machines so i can troubleshoot. still no luck, what is the problem. Please help.

THANK YOU ALL!! , I resolved the issue. I just cleaned the left and right sensor and now its working.

[mafifulos]

There are two sets of sensors that detect tray position and paper height, S4 for tray B and S5 for tray A.
Clean the sensors and make sensor auto adjustments.
TRAY SENSORS.pdf

thank you for the reply, but i already resolved the issu, i just cleaned the small light bulb on the left and right on the tray and its now working fine.

[mafifulos]

There are a set of sensors that look across the surface of the tray..when the paper stack gets higher, it detects this and tray drops fractionally to adjust. The transmitters are on one side and the receivers are on the other. They are level with the process tray(tray that stacks and offsets before ejecting stack out). Blow them out. Also on the tray itself there is a circuit board that has photo interrupts on it. There are cut outs in the rail...these photo interrupts look for the cut out to know the tray's position. The screw that mounts the board comes loose. Blow out the sensors also...The F means your sensors are not initializing...focus on the sensors that look across the tray

thank you!!! for the reply, the issue is the sensor. the small light bulb on the left and right on the tray and its now working fine.