e-Studio 457, not fusing...

[Oystercopy]

Hey folks.. these machines have (relatively) new Fusers, but I'm still having offset issues on some of them. The usual fix is to make sure that ground contact is making good ground with the frame, which I have done each machine. I've changed thermistors several times to address this problem, which never helps. Yes, using OEM rollers and OEM toner, just to pre-address that.

Any help appreciated!
OC

[Phil B.]

Re: e-Studio 457, not fusing...

Hey folks.. these machines have (relatively) new Fusers, but I'm still having offset issues on some of them. The usual fix is to make sure that ground contact is making good ground with the frame, which I have done each machine. I've changed thermistors several times to address this problem, which never helps. Yes, using OEM rollers and OEM toner, just to pre-address that.

Any help appreciated!
OC

important info missing:

what are they printing? coverage etc

what media are they printing on? plain - glossy - thick

how many pages have been printed on that fuser?

have you watched in SM to make sure fuser is reaching proper temp?

[BillyCarpenter]

Re: e-Studio 457, not fusing...

important info missing:

what are they printing? coverage etc

what media are they printing on? plain - glossy - thick

how many pages have been printed on that fuser?

have you watched in SM to make sure fuser is reaching proper temp?

I'd say that is critical information for diagnosing this type of problem.

[Phil B.]

Re: e-Studio 457, not fusing...

I'd say that is critical information for diagnosing this type of problem.

damn.. it's the BASICS IMHO!

[tsbservice]

Re: e-Studio 457, not fusing...

OC I can't help since not working on Toshys anymore but I remember from their predecessors like eS350/352 I have a few ones which do offset and adjustment on fuser temperature if I recall correctly helped. Just a thought.

PS.
Please guys keep calm, OC knows more for Toshibas than I ever knew

[Oystercopy]

Re: e-Studio 457, not fusing...

I would have specified if the customer was running thick stock; this is the only line item that would make any difference here. I also specified that the rollers were new (some with less than 10K) and this problem had been rampant on the e-456 series as well, so not a new problem. Hoping for a more helpful solution. F/W is up to date (or very close) on all these boxes.
OC

[blackcat4866]

Re: e-Studio 457, not fusing...

Three things that I would check:

1) There are two attachment hooks for the fuser pressure springs ... is it on the tighter setting?
2) I've had bad lamps before. The machine cannot detect an open lamp. Or, I've had lamps that had "hot" spots, blistering the teflon in a ring all the way around the roller.
3) I've had intermittent thermostats that open up under load, but usually present with fuser codes, so they're pretty easy to diagnose.

You can try increasing the fuser temperature, but I'd increase the pressure and replace lamps and thermostats first, and I think I'd try setting my plain paper for Thick1 media type first to see if it helps.
=^..^=

[tsbservice]

Re: e-Studio 457, not fusing...

Three things that I would check:

1) There are two attachment hooks for the fuser pressure springs ... is it on the tighter setting?
2) I've had bad lamps before. The machine cannot detect an open lamp. Or, I've had lamps that had "hot" spots, blistering the teflon in a ring all the way around the roller.
3) I've had intermittent thermostats that open up under load, but usually present with fuser codes, so they're pretty easy to diagnose.

You can try increasing the fuser temperature, but I'd increase the pressure and replace lamps and thermostats first, and I think I'd try using Thick1 media type first to see if it helps.
=^..^=

Oooh springs I forgot about them. I would try another fuser and if it works well will concentrate on items BC mentioned.

[Oystercopy]

Re: e-Studio 457, not fusing...

Thanks Black Cat and TSB for the honest and helpful responses.

Yes, I usually put the fuser tension spring on the tightest setting; usually higher than the OEM setting they come on.

I've heard about thermostats and replacing defective lamps, but I've also (hadn't mentioned this) replaced the lamps to solve this problem, and have not had it work for me, and I tried it
several times. And those lamps are NOT CHEAP, so not sure if that's the issue. But you would think the machine's internal diagnostics would detect low fuser temp and throw codes, but that's
not usually the case. It just runs too cool, so I guess my first option will be to up the fuser temp to see what it does. That's not usually my "go to" solution, as I don't like taking the machine out of spec
to solve problems... that usually only causes issues down the road, in some way or fashion. Plus, these Toshibas are so weak in the fuser that I would hardly want to add more stress to that teflon roller surface,
they don't last long enough as it is.

I am SO GLAD I'm moving on from Toshiba and relying on the Konica Minolta brand these days.. MUCH better box and none of these weird, waste-your-time-and-money issues...LOL
OC

[Rusty.Harris]

Re: e-Studio 457, not fusing...

We had similar offset problems with non OEM toner, that we had one tech tweak the fuser temperature just a bit higher
that took care of it. One thing I HATE is NON OEM toner, but, I don't own the company, so I don't get to make that
decision. As others have mentioned, the lamps can get hot spots and I have seen some put the wrong connectors
back on the lamps from time to time. But, that usually causes the machine to stop during a longer print job and
say "please wait" until it warms back up.

[Phil B.]

Re: e-Studio 457, not fusing...

I would have specified if the customer was running thick stock; this is the only line item that would make any difference here. I also specified that the rollers were new (some with less than 10K) and this problem had been rampant on the e-456 series as well, so not a new problem. Hoping for a more helpful solution. F/W is up to date (or very close) on all these boxes.
OC

re: Rollers in your OP " these machines have (relatively) new Fusers " what is 'relatively' ..no page counts mentioned

not trying to start a tiff.... have other users say they put in a new fuser .. only to get informed "well I robbed it from a used machine.

Thick stock can kill a fuser as you well know... have seen some brands that it cut fuser life by 50-60% (samsux and brother come to mind)

[blackcat4866]

Re: e-Studio 457, not fusing...

Needless to say, the wrong model fuser will cause poor fusing, 30 minute "Please Wait." intervals, and eventually wearing out the helical drive gear on the main motor for hours of continual idling. I was shocked to find that this customer had been running it that was for weeks. =^..^=

[Oystercopy]

Re: e-Studio 457, not fusing...

OK so just an update on one of these machines. I finally took the time to look through the service manual to find the fuser temperature adjustment, and lo and behold, it appears to have been VERY low... I used 08/2010 and the setting was at number "4".. if I'm reading this right, the default setting for that series machine should be "10"... omigosh. A difference of being at 160c (4) when printing vs. 190c (10)... wow, big difference.

So, once I rebooted the machine, the offsetting was gone, at least for now.

Will update further if necessary.
OC

[Phil B.]

Re: e-Studio 457, not fusing...

OK so just an update on one of these machines. I finally took the time to look through the service manual to find the fuser temperature adjustment, and lo and behold, it appears to have been VERY low... I used 08/2010 and the setting was at number "4".. if I'm reading this right, the default setting for that series machine should be "10"... omigosh. A difference of being at 160c (4) when printing vs. 190c (10)... wow, big difference.

So, once I rebooted the machine, the offsetting was gone, at least for now.

Will update further if necessary.
OC

Awesome! Congrats brother!

Sent from my SM-G960U using Tapatalk

[Blizzoo]

Re: e-Studio 457, not fusing...

OK so just an update on one of these machines. I finally took the time to look through the service manual to find the fuser temperature adjustment, and lo and behold, it appears to have been VERY low... I used 08/2010 and the setting was at number "4".. if I'm reading this right, the default setting for that series machine should be "10"... omigosh. A difference of being at 160c (4) when printing vs. 190c (10)... wow, big difference.

So, once I rebooted the machine, the offsetting was gone, at least for now.

Will update further if necessary.
OC

Normally the latest FW will have these fuser temperature codes adjusted after update to address fuser issues that has been so many over the years.