Hi folks,
I'm hoping someone might offer some helpful advice about a C253 I'm working on at the moment. One of the rollers in the fuser unit seems to have melted; the rubber is twisted and blistered. The other looks fine.
(First, and most embarrassing question: the melted roller is the outer-most one. Is this the heat or pressure roller?).
Obviously the immediate solution is to replace the fuser unit (unless by some lucky chance I can get my hands on a replacement roller, and swap it, but I gather that's a little tricky).
But unless I can understand how this happened there's a worrying possibility that the same thing could simply happen with the new unit.
Is this likely to be a temperature issue, or is it a normal wear and tear scenario?
(Or perhaps another possibility, like an object somehow finding its way into the fuser unit, or the customer using particularly thick card? Those seem unlikely but worth mentioning for completeness).
Notes on the temperature theory:
I've checked the Fuser Temperature settings and they were set to the default values. The error codes for abnormally high fusing temperatures weren't triggered. The machine is able to detect the temperature of both heat and pressure rollers in the fuser unit - can anyone tell me what would constitute a normal temperature value for these? Or at what temperature the rubber would melt? At the moment the heater roller rises from 200C up to 215C and then drops back to 200C, and cycles like that. The pressure roller rises gradually, and had got to 120C after a minute or two, at which point I decided to turn the machine off.
Notes on the wear and tear theory:
We bought this machine second-hand so it's possible the fuser unit has seen a lot of use and been reset rather than replaced. The problem did become apparent in a very short space of time but perhaps it's a gradual wear that suddenly worsens?
Any advice or suggestions greatly appreciated!
Thanks
I'm hoping someone might offer some helpful advice about a C253 I'm working on at the moment. One of the rollers in the fuser unit seems to have melted; the rubber is twisted and blistered. The other looks fine.
(First, and most embarrassing question: the melted roller is the outer-most one. Is this the heat or pressure roller?).
Obviously the immediate solution is to replace the fuser unit (unless by some lucky chance I can get my hands on a replacement roller, and swap it, but I gather that's a little tricky).
But unless I can understand how this happened there's a worrying possibility that the same thing could simply happen with the new unit.
Is this likely to be a temperature issue, or is it a normal wear and tear scenario?
(Or perhaps another possibility, like an object somehow finding its way into the fuser unit, or the customer using particularly thick card? Those seem unlikely but worth mentioning for completeness).
Notes on the temperature theory:
I've checked the Fuser Temperature settings and they were set to the default values. The error codes for abnormally high fusing temperatures weren't triggered. The machine is able to detect the temperature of both heat and pressure rollers in the fuser unit - can anyone tell me what would constitute a normal temperature value for these? Or at what temperature the rubber would melt? At the moment the heater roller rises from 200C up to 215C and then drops back to 200C, and cycles like that. The pressure roller rises gradually, and had got to 120C after a minute or two, at which point I decided to turn the machine off.
Notes on the wear and tear theory:
We bought this machine second-hand so it's possible the fuser unit has seen a lot of use and been reset rather than replaced. The problem did become apparent in a very short space of time but perhaps it's a gradual wear that suddenly worsens?
Any advice or suggestions greatly appreciated!
Thanks
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