ir4570 - fusing problem

[kuby]

Have a problem with a ir4570 not fusing properly sometimes. Days it will fuser OK and then one day first thing in the morning it will not fuser for a while and then starts fusing. Already changed the heating element assy. FM2-1793-020 and it works OK for a couple of weeks. Then the same thing. Have reset all the setting on the fuser back to factory and that did not help. What now? Any body run into this?

Thanks

UPDATE==============
Yes check the NIP, even when as far as to try another fuser. Same problem.

I went today on the same call and noticed that the top of the guide ( FC5-1356-000 GUIDE, FIXING DELIVERY, LOWER) on the fuser is damp and parts of the right door assy. are damp also. Is this machine sweating from the mix of the AC and the heat from the fuser? Is there something I need to look at? A fix? Could this be the problem?

[blazebusiness]

Re: ir4570 - fusing problem

Some possibilities:



Problem :
Toner is not completely fusing to the paper after passing through the Fixing unit.

Solution :
The tension spring for the Right Door Tang had broken, as a result the tang did not postion correctly when the right door was opened or closed. The tang is responsible for releasing Fixing pressure when the Right Door is opened and applying Fixing pressure when door is closed. The Tang was updated as per TP07 270 for another issue , the Tang part number is FM2-0355-010.

Problem :

Customer reported intermittent smudges on copies, could not duplicate problem. Copies were saved to verify, smudge was on machine rear side of copy. Fixing cleaning roller had a build-up at rear also. Replaced Fixing Film Assembly and Cleaning Roller then machine ran for 30k copies without smudges.


Solution :

Found toner dropping from between DV unit and Sub Hopper. Removed toner from inside machine and installed update parts from TP08-170. Machine was tested and after 150k, the customer confirmed no return of smudges and tech reported no toner droppings inside machine.

[kuby]

Re: ir4570 - fusing problem

Thanks will check on that...

[teckat]

Re: ir4570 - fusing problem

what about swapping the DCPCB

with no error code> u need to check-
Copier > Display > Analog; FIX-C is at ??? degrees / FIX-E is at ?????

[mrfixit51]

Re: ir4570 - fusing problem

I have seen that sweating issue on some copiers that were in very humid environments,,, what does the relative humidity say in the display>analog of service mode? You might want to bring paper from a different site, when the copier is exhibiting this problem,wipe out the path and try the "brought" paper to see if problem now goes away. I am leaning to a terribly humid environment, and we all know there are good days and bad days humidity wise.

[kuby]

Re: ir4570 - fusing problem

I don't think it is the humidity in the paper, because it is like it is not putting pressure on the paper and just makes a black mess. I think it might be broken pressure mech. Anyway I am going to try that first.

Thanks

[mrfixit51]

Re: ir4570 - fusing problem

I don't think it is the humidity in the paper, because it is like it is not putting pressure on the paper and just makes a black mess. I think it might be broken pressure mech. Anyway I am going to try that first.

Now that you restate the case, Blazebusiness has already answered your query. The hoop on the right hand door is not engaging the fuser pressure mechanism. If the door is closed gently, that spring loaded hoop will push the white plastic pressure engaging gear to clamp the fuser. Copies look good. Slam that same door closed, and the metal hoop jumps over the engagement mechanism, leaving the fuser unclamped. Result is poorly fused copies. Therein is the source of your issue...

[Simons]

Re: ir4570 - fusing problem

Here is a cure for background , not really for a poor poor fixing problem with strings of toner accuming on the cleaning roller. That sounds like like you could use the updated latch.

Copier adjust develop DE-OFST default is 0 . Turn this down 50 and watch your smudging go away or poor fixing stop and clear up. Greater value will increase density. ( try it ) This comes more into play when making copys last time I worked on this. I had a new rebuilt fuser in and a film that was obtained from BOP. I have deduced that these might be TSA films from what the guy told me, they are made in Germany not Asia. Anyway, internal prints were alot cleaner and copys just smudged or had a background. Turning this setting down some got rid of all the background and the quality remained very acceptable. I chalked it up as after market toner had been used. This was an offlease machine.

[teckat]

Re: ir4570 - fusing problem

COPIER > FUNCTION > MISC-P>ENV-PRT

Print out the in-machine temperature & humidity and fixing
temperature change log