Failed hot-end Thermistor connector

I was in the process of removing the hot-end from a 6mm nozzle to a 4mm nozzle and the connectors for the hot-end thermistor sensor and the connector on the board came with it. See pictures. This is a warranty issue is it not.?


I doubt it’s warranty, those JST type connectors are prone to doing that if you pull too hard while not properly depressing the locking tab on the connector.

As long as the pads aren’t messed up on the PCB, you should just be able to remove the connector and place it back on the PCB. Maybe add a little glue as well.

I Did press the bottom tab when removing the connector several times when switching heads., I guess it was just bad luck. and a not-so-tight fit for the jsp as you called it. Putting it back on is easier said than done if you have the eyes of a hawk and the steady hands of a surgeon. lol

The connector is surface mount and will require a bit of skill in resoldering it to the board. It’s not really a design flaw but a through hole type would have been a much better choice. I think I’ve heard of it being replaced under warranty, I don’t think it would hurt to enter a support ticket to see.

Trying to do a ticket but they want logs and as the printer was off at the time not sure how to continue.?
Also not sure what board it is either-- ap-mc-th-ac i think its the th. but guessing
printer log files ??
done the BambuStudio log files

It looks like it’s the TH board

Here is how to export a log. I would just export the most recent. I would also include the pictures you posted here as well as a description of what happened. It seems like the more information you give, the faster it will be resolved. Keep in mind I’ve never entered a support ticket so I’m just checking the wiki and going by other peoples reported experiences, both here and on reddit.

That i have done from bambustudio on pc. help show configure folder. done logs from there
see pic

but its the printer log files. ??

Just stuck a file from the sd card on it no idea what it was but a zip file and has been sent.

There’s nothing to solder though, it does not appear that anything came off the PCB, rather that housing slipped out of the pins. That’s why I was saying, as long as the PCB isn’t messed up just push it back on.

Are the pins still on the board? It was hard to tell from your original picture. As far as eyes like a hawk, I don’t think you’d need any better vision than you would had the connector housing stayed on the board?

I would still ask about a warranty replacement board, but honestly if you wanted to use your printer while you were waiting you don’t really need to put the housing back on.


Thermistors don’t have polarity, so as long as the two pins circled in red aren’t bent and are still in good condition, there’s no reason why you can’t just remove the housing from the connector and push the connector itself onto the pins.

looks like they are .
will give it a go.

I didn’t see that the pins weren’t in the connector but were still on the board. That means you can push it back on. Some manufacturers use a white silastic goop to glue things to the pcb. I think Bambu should have done so here but it’s tricky to just glue the one half of the connector.
Some time early this year, I saw something from them about glueing the plugs due to them coming loose with vibration. I’ve not seen it in months and don’t remember where I saw it.

you’re lucky it was just the plastic. just push it back on.

reply from Bambu support am getting a new replacement front tool board. :grinning:

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Great to see Bambulabs taking care of it’s customers!

What is the name of that connector ? I’m trying to make a heating machine with a 24V transformer 2A that will heate the head to unclaught it, and I want to control the heat by reading the temperature thru the sensor. Where to get it ?
Thx

The easiest way to get it right the first time is to buy the whole board. It’s 10.99USD

I’m not trying to fix the printer, I’m building a circuit that heat the hotend while it’s not on the printer. The goal is to unclog the nozzle without waisting printer time.

I think the connector your looking for is JST GH Female 1.25 2 PIN.

Very hard to find. At least it was me.

The hardest part was getting two wires on the smt connector. Holding the connector and getting everything hot was not easy.

Melted down two before success. :roll_eyes:

Alibaba dont have them now.

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I know you aren’t wanting to fix the printer. I’m saying that to find an unusual connector is fraught with danger. :wink: You will probably have to search online catalogs, spending many a minute looking for just the right thing, ordering it then being disappointed when it’s wrong. A path I’ve been down many times. The board I linked is a “buy once cry once” solution. And you should be able to connect to the pins by scraping resist from the traces and soldering to them instead of soldering to the SMT pads and kludging a strain relief.

If it’s a JST GH Female 1.25 2 PIN as @Barryg41 says, it’s $0.41 from Digikey.

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I Found them on Digi-Key
Product Number SM02B-GHS-TB
Description CONN HEADER SMD R/A 2POS 1.25MM

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