Fuser temperature far too high on ir3570

[Mark in England]

Hi all,

just wondered if anyone had any ideas why an ir3570 would keep blowing fusers?

The fuser overheats and cracks the element in the end.

The temp is 230 to 240c on a run which is way too high.

I've replaced DC controller and swapped the ac driver (long shot I know) from a known good machine. It's gone through 2 fusers now and I'm running out of ideas.

Anyone else had similar??

thanks in advance

Mark

[blackcat4866]

Re: Fuser temperature far too high on ir3570

Have you looked at the power?

[Mark in England]

Re: Fuser temperature far too high on ir3570

Have you looked at the power?

Hi

Thanks for the reply

The machine is in my workshop luckily so tomorrow my next step was going to be swap power supplies with a known good machine. Doesn't make sense though-the fuser runs off mains (220v) supply so you'd think the problem would be one of it not getting hit enough not too hot....worth a try though as most else has been ruled out.

Cheers

Mark

[vigour]

Re: Fuser temperature far too high on ir3570

Check for an AC driver or Solid state relay problem

[Mark in England]

Re: Fuser temperature far too high on ir3570

Check for an AC driver or Solid state relay problem

Hi

update on the fault although not really any further forward.

We've been working on it today and have swapped from a known good machine:
fuser assy
DC power supply complete with AC driver
DC controller
full MMI and DC controller clear
full HDD format and reinstall system software
check all cable ties and wiring fuser to DC controller and DC controller to AC driver

Still get the same high temperature 235c when it's running. Far too high and will blow the fuser if left unchecked. Should be around 205c when running.


Anyone one have any ideas as I'm beginning to think it must be that it has a curse on it and only a blessing from a priest will cure it!!

Cant see it being main controller but nothing really left.

Any ideas guys please??

cheers

Mark

[blackcat4866]

Re: Fuser temperature far too high on ir3570

Hi

update on the fault although not really any further forward.

We've been working on it today and have swapped from a known good machine:
fuser assy
DC power supply complete with AC driver
DC controller
full MMI and DC controller clear
full HDD format and reinstall system software
check all cable ties and wiring fuser to DC controller and DC controller to AC driver

Still get the same high temperature 235c when it's running. Far too high and will blow the fuser if left unchecked. Should be around 205c when running.


Anyone one have any ideas as I'm beginning to think it must be that it has a curse on it and only a blessing from a priest will cure it!!

Cant see it being main controller but nothing really left.

Any ideas guys please??

cheers

Mark

The main controller does handle the temperature signals, and possibly sending along false data. That's next. =^..^=

[Mark in England]

Re: Fuser temperature far too high on ir3570

The main controller does handle the temperature signals, and possibly sending along false data. That's next. =^..^=

Hi

Thanks for the reply. I've looked in the service manual and there's no mention of the main controller having anything to do with temperature control but I am inclined to agree with you (mainly as I've replaced everything else!!).

Do do you have any information about the main controller having anything to do with temperature control please??

many thanks
Mark

[blackcat4866]

Re: Fuser temperature far too high on ir3570

The thermistors run directly to the DC controller. If you need footnotes it will have to wait until tomorrow. =^..^=

[hachetman]

Re: Fuser temperature far too high on ir3570

The main controller does handle the temperature signals, and possibly sending along false data. That's next. =^..^=

there should be a triact (solid state relay) that on other models has been know to caused this type of problem

[Brian8506]

Re: Fuser temperature far too high on ir3570

Gonna look at one today but I think they run hotter than 205. Maybe I'm wrong but if it's overheating why is there no error codes

[canon33]

Re: Fuser temperature far too high on ir3570

I also question why no e codes. Are u using genuine canon film? Are u replacing just the film or the film assy?
I don't see these much anymore but would love to hear if someone else can Ck one in the field . I'm betting its normal

[copier tech]

Re: Fuser temperature far too high on ir3570

Yes I would expect it to throw an E001 etc error before it damages the fuser.

Change the fuser temp in service mode & see if it then maintains correct temp. FIX-TEMP set this to 2 (default is 0) 7 is the hottest.

I would also update the firmware to the latest version while you're at it.