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GT2560 3 transistors are overheating - almost burn

Posted: Wed May 04, 2016 3:45 am
by pekote
There are three transistors in the GT2560 that are really hot, probably more than 100°C. If I touched them with wet fingers, it is possible to observe boiling water.

I'm pretty sure that the life of the transistors operating at this temperature will be very short...

My printer has about 4 months operating OK, but I was wondering if other users with the GT2560 observed the same issue, and experienced any failure.

Re: GT2560 3 transistors are overheating - almost burn

Posted: Fri May 06, 2016 5:54 pm
by Admin
take care of the wires, do not peel off the cable too much

Re: GT2560 3 transistors are overheating - almost burn

Posted: Fri May 06, 2016 7:41 pm
by pekote
In fact, I have to correct the 1st post, there is only one transistor that is almost burning, the others are hot but not so much.
This is the one that heats the heat bed, the third counting from the left to the right in the picture. This transistor is really hot.

Re: GT2560 3 transistors are overheating - almost burn

Posted: Mon Aug 21, 2017 5:20 am
by fabrizio
salve,uscita del piatto riscaldato mk2a non va piu ,scambiandola con exstruder il piatto funziona cosa posso fare.

Re: GT2560 3 transistors are overheating - almost burn

Posted: Mon Aug 21, 2017 12:03 pm
by William
You should replace a new board.

Re: GT2560 3 transistors are overheating - almost burn

Posted: Tue Dec 05, 2017 2:16 pm
by alang
Having the same problem.

Can the Mosfet be replaced (will this fix the problem)?

Re: GT2560 3 transistors are overheating - almost burn

Posted: Tue Dec 05, 2017 4:40 pm
by William
alang wrote:
Tue Dec 05, 2017 2:16 pm
Having the same problem.

Can the Mosfet be replaced (will this fix the problem)?
I tried to replace it and solve this issue.

Re: GT2560 3 transistors are overheating - almost burn

Posted: Mon Jan 29, 2018 1:57 am
by sasodoma
If anyone else is experiencing this issue I recommend replacing the bed MOSFET with an IRLB8721. I did this today and the mosfet is now running a lot cooler. For 60°C you don't even need a cooling fan for it.

Re: GT2560 3 transistors are overheating - almost burn

Posted: Mon Feb 19, 2018 6:29 pm
by alang
I replaced mine with an IRL8743 and its running very cool.

I also soldered the 12V supply directly to the board as when the mosfet was faulty, it melted the 4 pin power connector.

Re: GT2560 3 transistors are overheating - almost burn

Posted: Mon Feb 26, 2018 2:08 pm
by William
alang wrote:
Mon Feb 19, 2018 6:29 pm
I replaced mine with an IRL8743 and its running very cool.

I also soldered the 12V supply directly to the board as when the mosfet was faulty, it melted the 4 pin power connector.
Cool!