[Jamming] Pansonic FP-7750 Registration roller not spinning.

[chejay127]

Good day Master.. I'm just a newbie at copier repair, and i really find this forum useful. The problem with my friends Panasonic f-7750 is that the paper is just jamming at the Registration roller, when i opened the front door cover i find the registration roller not spinning when the machine warms up, the roller i think is attached directly to a 12v motor and haven't test it yet if its busted or something .. Question is, does the REGISTRATION ROLLER of fp-7750 do spins at warmup??? or it just spins when you hit PRINT.. please HELP.. Thank you very much..

[User Name]

Re: Pansonic FP-7750 Registration roller not spinning.

I didn't work on these very much so I don't know but I would say probably not. What kind of Jam codes is it giving you?

Are you cheating the front door to see if it spins? Why not make a copy with the door open and watch to see if it 's turning or not?

[chejay127]

Re: Pansonic FP-7750 Registration roller not spinning.

I didn't work on these very much so I don't know but I would say probably not. What kind of Jam codes is it giving you?

Are you cheating the front door to see if it spins? Why not make a copy with the door open and watch to see if it 's turning or not?

Thank you very much sir, Yes i am cheating the front door cover so it will perform a warmup.. fuser, drum and exposure lamps are all working except for the "registration roller" w/c is attached directly to a 24v "registration clutch", (previous post is a typo, I forgot to edit).

[onetek]

Re: Pansonic FP-7750 Registration roller not spinning.

You can see if your registration roller is spinning by cheating the door and making copies in f3 mode,drawers opened.(green knob will spin). If you suspect registration trouble, you will have to remove registration unit from the copier to check the clutch.

[chejay127]

Re: Pansonic FP-7750 Registration roller not spinning.

upper and lower registration roller are not spinning whenever i print a copy and the paper was not passing trough the registration rollers. I did checked the registration assembly and removed the clutch, the problem is i just don't have a 24v supply i only have 12v, but some says it could run a 24v clutch. So attached it to a 12v supply and the clutch just flicks once and nothing happens. Could it be a busted registration clutch? Thanks.

[copiman]

Re: Pansonic FP-7750 Registration roller not spinning.

This is an older machine, so I'm not 100% sure, but the Panasonics I've seen use 24V for clutches. You can place a meter to it and see. Then see if you get the signal to engage clucth during copy process. If you have the manual, or just the schematic page, you can use it to troubleshoot. It could be the clutch, but before I ordered a clutch, assuming you don't have another to use, I would make 100% sure thats the problem.

[onetek]

Re: Pansonic FP-7750 Registration roller not spinning.

It is 24v. You can check if the registration roller gear rotates by using the bypass to feed paper. (bypass is driven by registration roller gear.). If it does rotate, then replace the clutch. Also make sure the registration sensor is ok.

[chejay127]

Re: Pansonic FP-7750 Registration roller not spinning.

It is 24v. You can check if the registration roller gear rotates by using the bypass to feed paper. (bypass is driven by registration roller gear.). If it does rotate, then replace the clutch. Also make sure the registration sensor is ok.

I could see the sensor is on its place sir, I also thought it has something to do about clutch, I'm not really sure but does the Registration roller rotates during a warm up? because in the warm up stage of this old machine(cheated door) the two registration roller are not spinning which is driven by the registration clutch alone, the same when I hit print. Also wondering if you remove the clutch and supply it with a 24v power would it spin if its working?? Because i have tried it and mine does not and it would just flick once and nothing.. thanks..

[copiman]

Re: Pansonic FP-7750 Registration roller not spinning.

[QUOTE=chejay127;360379]I could see the sensor is on its place sir, I also thought it has something to do about clutch, I'm not really sure but does the Registration roller rotates during a warm up? because in the warm up stage of this old machine(cheated door) the two registration roller are not spinning which is driven by the registration clutch alone, the same when I hit print. Also wondering if you remove the clutch and supply it with a 24v power would it spin if its working?? Because i have tried it and mine does not and it would just flick once and nothing.. thanks..[/QUOTEB

Based on your quote, I would suggest you get in touch with a technician in your area who works on copiers and let them resolve the problem. Clutches don't turn, they engage. Thats why you hear the click. So, your clutch seems to be working. Therfore, the problem is located elsewhere.

[chejay127]

Re: Pansonic FP-7750 Registration roller not spinning.

[QUOTE=copiman;360465]

I could see the sensor is on its place sir, I also thought it has something to do about clutch, I'm not really sure but does the Registration roller rotates during a warm up? because in the warm up stage of this old machine(cheated door) the two registration roller are not spinning which is driven by the registration clutch alone, the same when I hit print. Also wondering if you remove the clutch and supply it with a 24v power would it spin if its working?? Because i have tried it and mine does not and it would just flick once and nothing.. thanks..[/QUOTEB

Based on your quote, I would suggest you get in touch with a technician in your area who works on copiers and let them resolve the problem. Clutches don't turn, they engage. Thats why you hear the click. So, your clutch seems to be working. Therfore, the problem is located elsewhere.

We do not have any copier technician available in our area sir, since we are out of a city but thank you very-much for answering my questions.. You mean the clutch doesn't turn? So if it is powered, the Gear on the clutch will engage to the shaft of the Registration rollers? So motors are the ones who is driving the registration rollers and not clutches.

[copiman]

Re: Pansonic FP-7750 Registration roller not spinning.

Sorry to hear you cannot get support in your area. The way it works is:

The drive system is driven by a motor or motors. There are alot of gears that transport drive throughout the machine. Not sure about this on your machine, but the reg roller you are talking about may start turning when you try to make a copy, and the clutch stops it momentarily to ensure proper registration, then engage again to transport the paper. Some machines may keep the reg roller from turning, then engage the clutch to transport paper. Again, not sure on your machine. If it were me, I would check to see if the gears that supply the reg roller with drive were turning. If they are not, trace back to the motor that drives it. Hope this helps.

[Darren King]

Re: Pansonic FP-7750 Registration roller not spinning.

I could see the sensor is on its place sir, I also thought it has something to do about clutch, I'm not really sure but does the Registration roller rotates during a warm up? because in the warm up stage of this old machine(cheated door) the two registration roller are not spinning which is driven by the registration clutch alone, the same when I hit print. Also wondering if you remove the clutch and supply it with a 24v power would it spin if its working?? Because i have tried it and mine does not and it would just flick once and nothing.. thanks..

Motors supply the rotational force. An electromagnetic clutch, when energised, puts that force to the roller, when not energised, it freewheels and the roller does not turn. A clutch by itself imparts no rotational force on a roller. So, either the clutch is not being energised, or there is a gear or motor in the drive assembly that is not turning to supply the clutch with rotational force.
Hope this helps.
Darren

[onetek]

Re: Pansonic FP-7750 Registration roller not spinning.

Please read my last post: Place a sheet of paper on the bypass and make a copy.If paper starts feeding, then you know the registration gear is spinning. Replace the registration clutch if its spinning.

[chejay127]

Re: Pansonic FP-7750 Registration roller not spinning.

Please read my last post: Place a sheet of paper on the bypass and make a copy.If paper starts feeding, then you know the registration gear is spinning. Replace the registration clutch if its spinning.

Yes sir onetek, I have tried using the bypass and it is feeding but then jams before it reaches the registration roller because it is not spinning. I also could see the gear of the registration clutch spinning freely while rollers are not, and as sir king said maybe the clutch is not energized during the print that is why it doesn't engaged the roller to a rotational force. Another question sir, can I use a multi tester to check if the machine supplies power to the registration clutch when i make a copy? thank you all.

[copiman]

Re: Pansonic FP-7750 Registration roller not spinning.

Yes, you can use a multimeter to test to see if the clutch is getting the signal. I'm thinking if you place your leads across the connector of the clutch, and the copier is in ready state, you should get 0 volts. Then at some time during the copy process you should get a change from 0 volts to 24 volts. Watch your meter carefully for this change will be quick to see. Give it a try.