Got from Chinaman.......

[copier tech]

Re: Got from Chinaman.......

There are multiple ways these machines can detect over and under temp. The only one relating to real robust safety would be the thermal fuses. Then if you install the wrong kind of NTC it would be the same as having a fuser issue and the machine will code out of pop the fuse. Try and set ABS-FR alight. Its his own office machine so can't see the issue for him to try and safe some money.

Its a real shame how much waste these machines can generate. Dev units, drum units, fusers, transfer belts, waste boxes, empty toner bottles, rollers and then eventually the machine itself will find itself to a landfill. Anything that ca be rebuilt helps.

So many factors come into play.

Old wires that have now overheated, they can catch fire. Or they can short causing a fire anywhere on the mains circuit.

Simple wire shorts have brought down multi million pound aircraft.

[BillyCarpenter]

Re: Got from Chinaman.......

There are multiple ways these machines can detect over and under temp. The only one relating to real robust safety would be the thermal fuses. Then if you install the wrong kind of NTC it would be the same as having a fuser issue and the machine will code out of pop the fuse. Try and set ABS-FR alight. Its his own office machine so can't see the issue for him to try and safe some money.

Its a real shame how much waste these machines can generate. Dev units, drum units, fusers, transfer belts, waste boxes, empty toner bottles, rollers and then eventually the machine itself will find itself to a landfill. Anything that ca be rebuilt helps.

You are correct...there's always some kind of fail/safe component (thermal fuse/breaker) associated with the fuser circuitry. But they don't always work. I've seen fusers meltdown before. I'm sure we all have. I will admit it's probably less likely with the newer machines.

[allan]

Re: Got from Chinaman.......

You are correct...there's always some kind of fail/safe component (thermal fuse/breaker) associated with the fuser circuitry. But they don't always work. I've seen fusers meltdown before. I'm sure we all have. I will admit it's probably less likely with the newer machines.

Remember there was a model of Oce machine that was known for catching on fire. Never had a KM fuser melt on me only things like the pressure roller fusing to the upper. The only machine i know of that did over heat was a Ricoh that caused the thermostat fuse to trip. Then the old trick was to take it out and throw it on a hard floor to let the bi-metal dome pop back out.

Now i have found some techs bridging the fuse with a paperclip. Now that is looking for trouble.

[blackcat4866]

Re: Got from Chinaman.......

I looks like time for me to weigh in:

I entirely trust the safety features of the thermostats. If the fuser survived the first 60 seconds after full warmup, and the image fuses, I'm good with it.

It's not like Hans took the thermistor from a coffee maker and mounted it in a copier ... it's a slightly different incarnation of exactly the same part with same purpose and the same specifications.

Furthermore, Hans is just proud of his ingenuity, like I would be if I was as intelligent as he is.
Congratulations Hans! =^..^=

[BillyCarpenter]

Re: Got from Chinaman.......

I looks like time for me to weigh in:

I entirely trust the safety features of the thermostats. If the fuser survived the first 60 seconds after full warmup, and the image fuses, I'm good with it.

It's not like Hans took the thermistor from a coffee maker and mounted it in a copier ... it's a slightly different incarnation of exactly the same part with same purpose and the same specifications.

Furthermore, Hans is just proud of his ingenuity, like I would be if I was as intelligent as he is.
Congratulations Hans! =^..^=

I don't know about all of that. I've bought cheap crap from China that worked well for several months and then shit the bed. I used to work on TV's and I used a HOT (Horizontal Output Transistor) and it worked great for a while. Then it shorted and ruined the TV.


EDIT: Let me be clear, I'm not against Hans rebuilding anything. I'm all for it. What I'm concerned about is using a thermistor from China that he knows nothing about and China doesn't exactly have a strict safety code for electrical parts or anything else. It's a gamble, IMHO.

[BillyCarpenter]

Re: Got from Chinaman.......

BTW: I wish I had never gotten involved in this thread. I talked to Hans via PM and apologized to him for misreading what he said.

[tsbservice]

Re: Got from Chinaman.......

BTW: I wish I had never gotten involved in this thread. I talked to Hans via PM and apologized to him for misreading what he said.

You don't need to be worried. We are all intelligent people around here but sometimes somebody misunderstands. Quite normal. I'm sure that even top-top techs no need to name them are working hard every day to improve their self. So myself thinking - tomorrow will be the day when I'm going to be a little better. Kinda helps me in situations when I'm not-so-bright and there're a lot of them