MPC 6500 7500 Blowing toner

[andy227]

Re: MPC 6500 7500 Blowing toner

Does the problem look anything lke this ?

magenta dev2.jpgmagenta cleaning unit.jpg

The one machine of this type that I have to look after, I've learned that, A. it needs regular opening and cleaning of the PCU of deposits as shown. It goes on happily until the next time. B. I do not touch any settings, adjustments, in the service mode, ever. Anytime you seem to change anything on this machine it seems to throw up toner related codes and stuff, and you get into real deep shit. Clean and replace stuff when needed is all I dare do on this.

[Timmytronic]

Re: MPC 6500 7500 Blowing toner

Does the problem look anything lke this ?

[ATTACH=CONFIG]21059[/ATTACH][ATTACH=CONFIG]21060[/ATTACH]

The one machine of this type that I have to look after, I've learned that, A. it needs regular opening and cleaning of the PCU of deposits as shown. It goes on happily until the next time. B. I do not touch any settings, adjustments, in the service mode, ever. Anytime you seem to change anything on this machine it seems to throw up toner related codes and stuff, and you get into real deep shit. Clean and replace stuff when needed is all I dare do on this.

Hi Andy

That is exactly it. The thing is some machines run clean and then you have ones which just do this. You can renew the dev and pm parts, clean the mag roller as I know that can cause a problem but the issue appears quickly. I really can't see why ricoh can't offer a solution to a production machine like this. My life would be so much better. On the 5560 previous model this was not an issue ever.
Thanks for your response and if you find some magic please share

hope your having a good weekend.

[andy227]

Re: MPC 6500 7500 Blowing toner

As I said, its the only one of its kind I get to work on, and from others here on the forums I have realised that it is the norm for this machine. I vac out the units as soon as toner drops appear on copies, and it seems to go for some thousands before building up again. Its something you learn to live with. If a machine comes from its creator designed like that, who am I to do anything about it ? One thing I did find on this machine and worth sharing with you, during the week I did a new transfer belt and cleaning unit parts service on it, first time, its circa 450k colour copies. Under the transfer belt, the transfer rollers, held in by plastic spring loaded bushes. The white bushes at the rear end were all worn, very worn, oval shaped instead of round, to the point where the transfer roller will soon be scraping the side of its 'enclosure'. Not the front ones. I have to order bushes and strip the ITB down again (with the risk of damaging an expensive belt) for a set of cheapo bushes. The lesson is, if you do a job on the ITB, have a set of those bushes on hand.

[Timmytronic]

Re: MPC 6500 7500 Blowing toner

Thanks. I will have a look as I have just done one recently and was not looking.

Thanks loads.

[andy227]

Re: MPC 6500 7500 Blowing toner

You're welcome. Its the things you are not looking for or expecting that usually surprise you. The bushing I'm refering to is D0146 116 x 4.

[andy227]

Re: MPC 6500 7500 Blowing toner

Well Timmy, just to complete what I was saying before about those worn bushes on the transfer rollers, I ordered and recieved a new set. When I looked at the new ones, is when I had one of those WTF moments. The new ones are all exactly the same, ie thats how they are...WTF ? Look at the photo, this is the new bush. Why are they lobsided like that ? I thought it was worn. Looks like I won't have to replace them after all, but cannot understand why they are offset like that, never seen that before. Anyone ?

DSC_7330.jpg

[Iowatech]

Re: MPC 6500 7500 Blowing toner

Well Timmy, just to complete what I was saying before about those worn bushes on the transfer rollers, I ordered and recieved a new set. When I looked at the new ones, is when I had one of those WTF moments. The new ones are all exactly the same, ie thats how they are...WTF ? Look at the photo, this is the new bush. Why are they lobsided like that ? I thought it was worn. Looks like I won't have to replace them after all, but cannot understand why they are offset like that, never seen that before. Anyone ?

[ATTACH=CONFIG]21204[/ATTACH]

As the hole in the bushing looks round enough, I would guess there really isn't a problem here? I mean, if it the bushing fits tight enough on the roller shaft and in the frame of the machine, it should work fine no matter what it looks like.
I would guess in the picture of the bushing, the left side of the bushing might be thicker so it takes more time to wear out. Or maybe it is that way to provide proper spacing or pressure to the roller.
Sorry, this is all kind of weak, but still hope it helps.

[zulufan1]

Re: MPC 6500 7500 Blowing toner

Well, I work almost exclusively on these models, and have tried a number of things to reduce the toner dropping, and charge roller lines. I do believe that a combination of things are in play, so I have developed a sort of routine that I do on every call, which includes splitting all the pcdu's . This seems to get me a good long time between visits so far.


This is a combination of things from Technical Publications, Post on Here, and First hand successes and failures.



1. Make sure that SP 3501-003 is set to 0, and that 3501-005 is set to 1. This seems to have a great effect, but most improvement occurs after next Developer change.

2 Always check SP's 3812 & 3815 should be 1111 and 3817-1 to 3817-4 should all be 0, If not the last developer change did not go properly.


3. With pcdu separated, I reattach the Mag Roller Holder and drive Coupler, and Turn the Mag oller, while holding the holder from turning. If I see a cloud of toner come off mag roller, time to Change the developer, regardless of count.

4. I replace the lube bar springs in all the color PCDU's with Black springs, like the ones in the black PCDU. If I don't have black springs, I stretch the silver ones to lower tension on the lube bar.

4. I slide my thin steel ruled up under the lower blade mount, and while moving from side to side, I push the mylar guide up and out of the way so that the waste toner can make its way to the auger without interference.

5. I apply a coating of Car Wax to all the charge rollers, even new ones. This cleans ones with lines very nicely, and from what I can tell, seems to help prevent a buildup of lube bar material. When cleaning a used charge roller, I remove and vacuum the White cleaner bar from the top of the charge roller, as well.

6. I vacuum the 3 sets of filters at the rear of the machine, and the one under the white cover attached to the pcdu / ITB steel cover plate. I also set the PM counter for the filters to 100K, so I remember to check them often.

7. Always upgrade to the latest firmware.


I hope this helps, as it seems to have helped my 80+ machines so far.

[Timmytronic]

Re: MPC 6500 7500 Blowing toner

Hi zulufan
thanks for the advice. I do most of them apart from the Mylar and system upgrade. Have you tried taking the one way dev cam off to stop it dumping dev? I have with success on a few but some don't like it funny enough. Also I have cleaned the brown coating off the charge roller once worn and this is very smooth and white underneath which stops any more lines. Make sure it is spotless when it goes back in tho.

Have you the latest software update you could email me? Would really appreciate it.

Nice to speak to someone with such an array of these machine to do. There not bad machines but need a little mothering it seems.

Thanks for your time.

Tim.

[zulufan1]

Re: MPC 6500 7500 Blowing toner

I have not seen a need to mess with the excess developer auger. I upgrade all the firmware with the latest version straight from Ricoh. I do all the firmware, not just the engine.

[Timmytronic]

Re: MPC 6500 7500 Blowing toner

I have not seen a need to mess with the excess developer auger. I upgrade all the firmware with the latest version straight from Ricoh. I do all the firmware, not just the engine.

Hi

Have you the latest firmware you could email or send to me?

Many Thanks

Tim

[zulufan1]

Re: MPC 6500 7500 Blowing toner

Hi

Have you the latest firmware you could email or send to me?

Many Thanks

Tim

I don't think that is practical.. Too many files. Do you not have access to the TSRC website?

[Timmytronic]

Re: MPC 6500 7500 Blowing toner

Hi

No I don't but I have been given firmware here before a couple of years ago for another machine. I can give you an upload link from my website.

Tim.

[javaman7471]

Re: MPC 6500 7500 Blowing toner

I myself have several MPC6000 and 6501 machines in the field and agree it is usually worse on cyan and magenta for the dusting. I was visiting most machines at least every two weeks but have started using a ground plate supplied by [NA Trading (952)888-7654 ask for Burke, part #02037013] which is installed behind clear plastic cover on metal drum stay at front of machine. This has cut my calls down on more than 85% of machines to a call every two months. As far as lines on the charge rollers I am resorting to my fix for the same problems on MPC3000 where I just remove the worthless white sponge cleaning roller, clean the charge roller and they usually will last several thousand more copies before they need to be cleaned again. I have not tried the removal of the 1-way bearing and lever for dusting but will at my next call to see if I can stretch the calls longer than two months. Hope this helps anyone in this same sinking ship as we all seem to be in. Happy vacuuming!!!

[Timmytronic]

Re: MPC 6500 7500 Blowing toner

Hi. Have you a picture of the plate and where it goes?

What does the plate do?

The one way bearing is not a good idea to remove. I tried it and it was more hassle than its worth. To stop the white lines change the silver lub bar pressure springs to the same black ones in the black unit. Unit lasts four times as long and gets to 200k before needing service.

Hope that helps

tim.