MP-C3002 toner build-up at fuser entry

[aAandy]

Hello people

as per the attached image, i have toner building up on the fixed fuser entry guide which is causing smudging on prints - wipe it off and print quality returns, but it doesn't last long

i left a rag with the client, they wipe it as required

it seems to me the paper upon leaving the transfer belt/roller doesn't quite touch the guide, but toner builds up on it then smudges - the transfer roller has some sort of grid and i'm wondering if a separation voltage has died

it started happening suddenly, no other faults and low print count (C-118k M-38k)

any ideas?

thanks in advance
toner build-up.pdf

[slimslob]

Re: MP-C3002 toner build-up at fuser entry

You have to correct the cause of the toner getting on the fusing entry guide. In cleaning the entry guide you are treating a symptom not the problem. Ricoh machines are notorious for toner scattering. It is made worse by low print volume, toner concentration in the developers and use of after market supplies. Thoroughly clean all scattered toner. If you have been using after market toner, throw it out and replace the developer. Use only Genuine Ricoh. Finally make the changes in the attached document.

[Zeldaman]

[aAandy]

Re: MP-C3002 toner build-up at fuser entry

You have to correct the cause of the toner getting on the fusing entry guide. In cleaning the entry guide you are treating a symptom not the problem. Ricoh machines are notorious for toner scattering. It is made worse by low print volume, toner concentration in the developers and use of after market supplies. Thoroughly clean all scattered toner. If you have been using after market toner, throw it out and replace the developer. Use only Genuine Ricoh. Finally make the changes in the attached document.

yes, i realise i'm treating a symptom by wiping the toner off, which is why i posted asking about cause

there is no toner scattering anywhere else in the machine, not in the drum units, the dev units, the ITB or paper paths,,, just that one spot - if it was a scattering problem surely the fault would have occurred gradually and gotten worse over time, not suddenly (perfect for years and overnight fault)

no aftermarket products are being used

sadly the service manual doesn't include theory of operation, it seems to me residual charge is left on the paper after transfer and that is attracting the toner to the guide

thank you for your post and the document

[aAandy]

Re: MP-C3002 toner build-up at fuser entry

thank you for your post - i don't suppose you have the bulletin?

[blackcat4866]

Re: MP-C3002 toner build-up at fuser entry

If I understand correctly, I'd imagine that if the fuser motor slows down a little, the imaged paper would buckle up far enough to scrape some unfused toner off of the top of the page onto the upper fuser guide. Most of that disturbed toner will get fused to the paper, but at the front and rear some of that toner will dust onto the lower guide, and partially fuse due to the proximity of the fuser.

I've seen something similar on HP LJ 4100n printers. The fixing film on some of the aftermarket rebuilt fusers is not adequately greased, so the fuser motor can bog down, and get the same affect. I'm not that familiar with the MP-C3002, but I'm hoping they have a better fuser than the HP. =^..^=

[Zeldaman]

[Mark Bbb]

Re: MP-C3002 toner build-up at fuser entry

This issue will occure very more quickly when customer uses thick paper without selecting it on the machine.

[aAandy]

Re: MP-C3002 toner build-up at fuser entry

a big thank you

indeed the pictures speak for themselves,, looks exactly like the problem both on the fuser and the image - i'll check the fuser for free rotation and if all good fit a new fuser drive motor

[Polarbear]

Re: MP-C3002 toner build-up at fuser entry

Translated data (courtesy of Google Translate) at the top of the page:

If a heating unit reaches half of its profit target (approx. 140,000 pages),
In the case of the old heaters, the sleeve unit could become heavier.

And below the images:

This can result in starting a print or copy operation from standby
the rotation of the pressure roller, the sleeve briefly stops or rotates slower than the
driving press roll.
The first 2 nd to 3 rd leaves are braked, the paper is bulging in front of the heating rollers
and the unfixed toner wears off the heater inlet.
Thus, the pollution occurs before and after the fixing area as well
Smudging of the typeface (see image overlay and effects on the chassis).
With the SP 1-801-072 can speed the heating motor and paper transport
adjusted (approx. to + 0.5% to + 1.5%)
If the phenomenon also occurs after replacing the sleeve unit or the heater,
There is still the possibility that the heater drive motor suffered from the load
Has. Then the heater drive motor (order number: AX060430) must be replaced.

[blackcat4866]

Re: MP-C3002 toner build-up at fuser entry

Maybe this isn't any better than the HP fuser. =^..^=

[aAandy]

Re: MP-C3002 toner build-up at fuser entry

Translated data (courtesy of Google Translate) at the top of the page:

If a heating unit reaches half of its profit target (approx. 140,000 pages),
In the case of the old heaters, the sleeve unit could become heavier.

And below the images:

This can result in starting a print or copy operation from standby
the rotation of the pressure roller, the sleeve briefly stops or rotates slower than the
driving press roll.
The first 2 nd to 3 rd leaves are braked, the paper is bulging in front of the heating rollers
and the unfixed toner wears off the heater inlet.
Thus, the pollution occurs before and after the fixing area as well
Smudging of the typeface (see image overlay and effects on the chassis).
With the SP 1-801-072 can speed the heating motor and paper transport
adjusted (approx. to + 0.5% to + 1.5%)
If the phenomenon also occurs after replacing the sleeve unit or the heater,
There is still the possibility that the heater drive motor suffered from the load
Has. Then the heater drive motor (order number: AX060430) must be replaced.

thanks for the translation, i had done the same with google translate

on my 2nd visit to this client (prior to posting this thread) i altered SP 1-801-072/3 & 4 (added 1 to initial) and when i returned to check if the fuser was heavy to turn, the client said they hadn't had the problem since my 2nd visit

thank you all for your assistance, muchos grassy-ass