Ricoh MPC4500, Fusing problems

[The-Peanut]

Ricoh MPC4500 copier

when doing black and white copies machine is working fine with no jamming or quailty issues.

but when doing full colour the image is rubbing off from the paper and also the paper is sticking to the belt part of the fuser which causes it to jam.

i've replaced the belt and cleaning rollers etc
also tried the tray in thick2
using standard 80gsm paper

cheers for any info

John

[CableGuy]

Are the rollers inside the fusing unit good? especially the orange sponge pressure roller inside the belt, it starts to break free from the metal core and wander to the left or right? Had this recently, also seemed to be more prevelant on colour copies.

Cheers

[TonerMunkeh]

Ferrite roller might be on it's way out too. Replace them all as a set. Also try middle thick, I've had that sort a few poor fusing issues.

[The-Peanut]

i did clean the orange sponge roller which sits inside the belt, it dont move as i rubbed it down with a cloth, but i've just checked the copies and noticed that the individial colors dont rub off the paper but the black does (colour copy) which mean the colours that make the black dont stick to the paper

i'm starting to wonder if its a toner issue as i dont use originals

cheers
John

[The-Peanut]

Ferrite roller might be on it's way out too. Replace them all as a set. Also try middle thick, I've had that sort a few poor fusing issues.

yeh i did try the machine on thick 2 however it made no difference
what is a ferrite roller?

[Jomama46]

i did clean the orange sponge roller which sits inside the belt, it dont move as i rubbed it down with a cloth, but i've just checked the copies and noticed that the individial colors dont rub off the paper but the black does (colour copy) which mean the colours that make the black dont stick to the paper

i'm starting to wonder if its a toner issue as i dont use originals

cheers
John

I think you have discovered the problem

[TonerMunkeh]

The ferrite roller is the metal coated roller located right at the front of the fusing unit. Non-OEM toner is an absolute killer on these machines too. Try and keep original toner in it.

[spaceman99]

I had this fault,. the machine was due an overhaul any way so I replaced the transfer roller all non oem toners , replaced all drums and devs, plus cleaner unit, Vac out all the toner pumps and pipes and serviced the fuser. and still it jammed.
I fixed it in the end by moving the fuser entry guide as far back as i could and bent -"opps sorry" reformed the fuser tray that it sits on. it then stopped the problem in its track. I lifted the fuser tray. One way to tell if it is the tray is try another fuser as it will jam on that one to.
good luck

[msaeger]

I would just rebuild the fuser PMB222160K I wouldn't think you would have to do any special adjustments for that weight of paper. How many copies are on the fuser anyway ?

[The-Peanut]

Hi folks thanks for the info, the ferrite roller has been cleaned and looks like new, the machine has done about 360k however i've just replaced the belt where the image is sticking to, i did look at the fuser entry guide i'll have another look at that but i'm kinda pointing the finger at the toner as when u run copies in black its ok however normal colour is fine untill the machine cobines the colours to make black on full colour, thats when the toner sticks to the fuser belt

i should have sold them a Panasonic

[msaeger]

The fuser is suppsed to be rebuilt at 160k so I would rebuild the fuser.

[spaceman99]

Quote
i should of sold them a Panasonic

It is a Panasonic Engine i belive.

[banginbishop]

non original toner is causing the toner to peel off - my company uses it and we had no end of problems especialy if you mix and match e.g oem black and non oem yellow etc it just doesnt like it. We changed supplier again and it works a bit better. As your machine has done 360k dont rebuild the fuser just fit a printer fuser kit, its cheaper than rebuilding it with the rollers, bearings & belt etc - all you do is change the harness over.

If your comapny doesnt believe you on the toner ask for oem toner as a trial on the machine - remove the old stuff, oem toner in and sky shot 50 pages from each colour to remove the old crap out.

[ucinn]

These machines have no scrapers on the fuser to keep this from happening, neither does the LD540C's. There is just so much toner on color bolds that it sticks to the belt especially if the leading edge is heavy in color. I have a 540C that they have color from edge to edge, new fuser wouldn't cure. There were two things we found, run SEF and that is less paper/toner in contact with belt when fusing which seemed to help some. What I did to cure this one was to increase the leading edge void and that gives better seperation for the "scraper bar" to do it's job.

[zyqwiz]

Quote
i should of sold them a Panasonic

It is a Panasonic Engine i belive.

Panasonic? You've got to be joking!