4002 C6600

[Geo]

Hi Folks


Has anybody bothered to figure out why these fuser will give a C6600 or C6670 error after being shut down overnight.. The codes will clear with a power cycle and will work for the entire day or even days..Then it pops up again. Fuser age/clicks ( 20-300 k) don't seem to be a factor .

Thanks

[copier tech]

Re: 4002 C6600

Hi Folks


Has anybody bothered to figure out why these fuser will give a C6600 or C6670 error after being shut down overnight.. The codes will clear with a power cycle and will work for the entire day or even days..Then it pops up again. Fuser age/clicks ( 20-300 k) don't seem to be a factor .

Thanks

Have you tried updating the firmware ?

[davidmtupper]

Re: 4002 C6600

The grease in the bearings/bushings is starting to fail. Power cycling the copier gives enough of a surge to break it loose and get it running for the day. Do yourself and your customer a favor and replace the fuser because it WILL fail, sooner rather than later. Wear gloves while doing this as the grease leaks at both ends and stains your hands, it also drops chunks so don't set the fuser on anything you care about.

[Geo]

Re: 4002 C6600

Have you tried updating the firmware ?

Yes...It seems as if there is a timing issue or perhaps a thermistor gets a little weak ,

[Geo]

Re: 4002 C6600

The grease in the bearings/bushings is starting to fail. Power cycling the copier gives enough of a surge to break it loose and get it running for the day. Do yourself and your customer a favor and replace the fuser because it WILL fail, sooner rather than later. Wear gloves while doing this as the grease leaks at both ends and stains your hands, it also drops chunks so don't set the fuser on anything you care about.

I always replace the unit, but I'm curious as to the why..Not sure I can agree with your diagnosis for all cases . . I have had the code pop up at 60 K and the bearings "seemed" OK..I know the condition you are talking about .Wearing gloves is a must unless you want stained hands.

Thanks

[davidmtupper]

Re: 4002 C6600

6600 code is the fuser not turning. Since this usually occurs once the grease starts leaking it's probably related pretty closely, although I have seen that code with a torn belt at least twice. I have yet to have one where that code is fixed without replacing the fuser.

[tmaged]

Re: 4002 C6600

Turning U346 to off helps. The inside of the upper heat belt gets worn and doesn't drive to turn as it should. Rather than letting it run continuously, that code will stop it after it's done.

[KYO_OEM]

Re: 4002 C6600

I agree with tmaged,
take a look for 2nd and 3rd value from U167 and you will see very high counter from released runtime against pressed runtime.
The belt will slip if 2nd value is too high.
U346 will stop driving when jobs are finished and life time will increase.

[Mahmoudm5]

Re: 4002 C6600

Thanks

[kenoking]

Re: 4002 C6600

Set 346, and to avoid replacing a $400.00 part, go get yourself some liquid nails (fuse it)! If there is no other wear on belt or PR, lube PR bearings, Then carefully blow out fuser endcaps, score the belt every 1/8th of an inch on both sides very very lightly as to not tear the belt!!, score the caps! Then goop some nails on your finger and apply between cap and roller (like caulking a window). Don't use too much or it will lump and catch on cap cleaners and giude. Let sit 24 hrs, clean any lumps as you spin by hand. Install. Just enough grip to allow belt and caps to spin together. This is the only substance I found that will adhere to that belt. I have 7 or 8 running in the field and so far so good. Saved my dealer 3200.00 plus shipping as they always fail out of warranty. Design of these fusers makes zero sense. A simple design like the 5551ci worked just fine. gear driven assy!! Engineers justifying their existance............

[fishleg]

Re: 4002 C6600

Belt foam bearings every time... Just keep the power save really low and silent mode on or you'll get this code by 300k and if your really lucky machine will squeak with all the rust build up.

Once the belt slips the timing between each side gets messed up and triggers that code. I like the liquid nails idea but not for me 🤣. Once you get that code the fuser is done I actually tried to take some good bearings from one fuser to another and it still slipped so I think the belt actually stretched over time on mine.

[PrintWhisperer]

Re: 4002 C6600

FYI all y'all (some helpful hints I ran across):


7BG010015H
GREASE MOLYKOTE HP-500 50G Heat resistant grease:50g content

[Caution]
The heat-resistant grease can be applied to the both edges of the fuser exit roller and fuser exit sub roller only in the fuser unit. (Note 1)
 Do not apply grease to other than the above, specially, [Where to prohibit applying grease] in the next page. (Note 2)
 Use the designated grease. It is prohibited to use spray grease (silicon oil type) (because it's application cannot be controlled and it 'travels' beyond applied areas)
 Service call error C6770/C6600/C6220 (Note 3) might be caused according to place and method of applying grease.

[Note 1: Where grease can be applied]
When an abnormal sound occurs at the fuser exit section, clean the fuser exit roller shaft edge, bushing and stop ring (in case of abnormal sound from the upper fuser exit section), or the fuser exit sub roller shaft edge and bushing (in case of abnormal sound from the lower fuser exit section), and apply a rice grain size of the heat-resistant grease (No1) to the sliding surface of the shaft edge.
 If abnormal sound is not solved after applying grease, it is recommended to replace the fuser unit.

Allow-Grease.jpg


[Note 2: Where to prohibit applying grease]
As mentioned above, no grease can be applied to other than the fuser exit roller and fuser exit sub roller. Especially, applying grease to the below might cause the fuser service call error and it is prohibited.


Use of the spray grease is also prohibited since it is difficult to limit the area to apply.


 Fuser belt cap gear at the both edges of the fuser belt (especially, border to fuser belt: Y in the figure below)


If grease gets into the contact surface of the sponge in the fuser belt cap gear, and fuser belt, the fuser belt cap gear might slip causing no fuser belt rotation, and service call error C6770 or C6600 might turn on.


 Fuser belt surface, fuser press roller surface, fuser entry guide and entire fuser unit housing (spread spray grease entirely)


Fuser belt slips and service call error C6770, C6600 or C6220 might turn on.
There is also a concern of influence to the image due to the paper conveying surface contaminated with grease.
Prohibit-Grease.jpg

[outdoorkatie123]

Re: 4002 C6600

Hi do you need to regrease the fuser belt ?
The problem we are having when we get C6600 is that their is to much friction between the belt and the heating assembly the grease seams to make its way out or dry up
we have tried numerous different greases but haven't been able to find the correct one yet

[PrintWhisperer]

Re: 4002 C6600

Hi do you need to regrease the fuser belt ?
The problem we are having when we get C6600 is that their is to much friction between the belt and the heating assembly the grease seams to make its way out or dry up
we have tried numerous different greases but haven't been able to find the correct one yet

The above info pretty much lays it out. Engineering says use the provided part number grease only, and only for lubrication of feed roller shaft bushings. No part of the fuser belt/tube should be lubricated.

Build-up of old and incorrectly applied lubricants only makes the problem worse.



'Lubricants cannot increase friction between two moving surfaces but if you have not chosen right lubricants for right application or if you have, chosen high viscosity grease or oil in high speed & low load carrying applications, then it can increase the friction between internal molecules of the lubricants.' (Particularly when cold i.e.: First start of the morning as related by the OP)

[blackcat4866]

Re: 4002 C6600

Thanks PrintWhisperer! Much appreciated.

I've been a fan of Molycote HP-500 for a long time now. It was how we managed to keep the Sharp C-Jupiter fusers from squeaking and ticking. It's a little bit expensive, but never smokes or stinks, like some of the other high temp grease products are known to do. I didn't notice a part number ... Sharp calls it: UKOG-0235FCZZ. Oh, there it is, Kyocera call it: 7BG010015H

=^..^=