C3351

[copyman]

Is there an interlock on the ADF for the C3351? Looked in service manual and couldn't find anything. Customer says if they lift ADF and place original on glass to make a copy the first page exits fine, when they lift ADF to place next orig on glass message comes up "componet open" and machine wont reset for a while, they try opening all doors & covers, turning off and on main switch does not reset message. This happens intermittently and only when placing orig on glass. ADF works fine once you get machine reset and ready to copy. I have a C3350 in shop and ADF looks the same but looking in parts manuals they have different part #. But most of the parts are the same. Has anyone here ever tried a C3350 ADF on a C3351?

Thanks in advance

[kingarthur]

Item 14 is the ADF door sensor - PS101
image.png

[copyman]

Thanks king !!! Looking at 3350 I have in shop it apprears interlock works on gravity and why no actuator. The top of ADF cover has to come off to see sensor & actuator.

[copyman]

I went onsite to see what is going on. Turns out if the ADF pick up rollers do not return to home position after two tries the message comes up "componet open" with no indication what is open. It was intermittent because sometimes they returned to home position, but when customer lifted lid to copy off glass the rollers dropped. I'm guessing I need to replace the lift clutch?
Any one see where the ADF rollers will not return to home position?
Thanks again for the help.

[femaster]

Any one see where the ADF rollers will not return to home position?

I have seen that on both the C3350 and C3351 lines. It's caused by the plastic in the ADF feed assembly getting fatigued and/or wearing. Between the tires there is a spring clutch with what I would call a limited slip do-dad. The spring clutch only allows it to spin in one direction, but when it turns in the "free" direction there are little bumps inside the plastic shaft that grab, giving the tires the ability to lift up, and then to slip when they are fully lifted.

If you remove the ADF feed assembly, spin the drive shaft in one direction and tires will rotate. Spin it in the other direction and you will hear a clicking noise as the shaft in the middle rotates and the protrusions pop in and out of the grooves they rest in. The end of the plastic shaft has cutouts in it to allow it to expand in order for the protrusions to pop in and out of the grooves. This is what wears out, and then there isn't enough force (friction) to allow the feed assembly to lift any longer. You will likely need to replaced the feed assembly, unless you can source a good used one from a parts machine.

Image below shows the area I'm talking about, and the second image shows it in between the grooves so you can see how the end of the shaft expands.

ADF Feed 1.jpg ADF Feed 2.jpg

[adecanmin]

I put a small zip tie over the plastic teeth. Don't pull it too tight. Saves having to buy an expensive assembly. I also use hp 4100 or hp 4250 feed rollers to replace the worn out gray roller. The hp rollers will move on the shaft over time. I use a little super glue to hold them in place.

[copyman]

I put a small zip tie over the plastic teeth. Don't pull it too tight. Saves having to buy an expensive assembly. I also use hp 4100 or hp 4250 feed rollers to replace the worn out gray roller. The hp rollers will move on the shaft over time. I use a little super glue to hold them in place.

Thanks, nice tips. That feed assembly isn't cheap!

[copyman]

I have seen that on both the C3350 and C3351 lines. It's caused by the plastic in the ADF feed assembly getting fatigued and/or wearing. Between the tires there is a spring clutch with what I would call a limited slip do-dad. The spring clutch only allows it to spin in one direction, but when it turns in the "free" direction there are little bumps inside the plastic shaft that grab, giving the tires the ability to lift up, and then to slip when they are fully lifted.

If you remove the ADF feed assembly, spin the drive shaft in one direction and tires will rotate. Spin it in the other direction and you will hear a clicking noise as the shaft in the middle rotates and the protrusions pop in and out of the grooves they rest in. The end of the plastic shaft has cutouts in it to allow it to expand in order for the protrusions to pop in and out of the grooves. This is what wears out, and then there isn't enough force (friction) to allow the feed assembly to lift any longer. You will likely need to replaced the feed assembly, unless you can source a good used one from a parts machine.

Image below shows the area I'm talking about, and the second image shows it in between the grooves so you can see how the end of the shaft expands.

ADF Feed 1.jpg ADF Feed 2.jpg

Great detailed instructions. Thanks!