Hakko T12 controller with JBC T245 iron - Page 1
Forum section: electronics / general

author: postman
author_rank: Contributor
timestamp: September 05, 2016, 10:42:07 am
content: Hi all.I've read many thrads about soldering controller in the forum, but is the first post I write. I hope to learn a lot here.I have a JBC T245 iron and a Hakko T12 chinesse controller like this:I'm assuming the iron's connections are:So, if I connect the iron's "+" to "T12+" of the controller, and iron's "-" to controller's "G", heats up correctly and works pretty well.Nevertheless, if I connect iron's "GND", to controller's "E", my power supply shows a short circuit.As I've said, the system works well connecting only the iron's "+" and "-", but I think could be not secure to use without connecting the outer shield of the iron tip to ground.What do you think about it? Could I ground the tip by any way? There're some problem using it like until now?Thanking you, I look forward to your replies.Best regards from Spain.

author: helius
author_rank: Super Contributor
timestamp: September 05, 2016, 11:20:29 am
content: The JBC cartridge has an internal thermocouple connected to the third terminal (the ground sleeve). But on the Hakko T12, the thermocouple is in series with the heater. The ground sleeve on the Hakko is only to provide ESD ground protection to the tip.The problems you're seeing are expected, given this difference. In effect you've shorted the heater driver to ground.

author: postman
author_rank: Contributor
timestamp: September 05, 2016, 02:38:04 pm
content: Thank you @helius.Do you think is safe to use the iron whit the outter sleeve unconnected?Thank you.

author: wraper
author_rank: Unknown
timestamp: September 05, 2016, 02:43:19 pm
content: Quote from: postman on September 05, 2016, 02:38:04 pmWhat the point using JBC soldering iron without temperature control?

author: postman
author_rank: Contributor
timestamp: September 05, 2016, 02:54:43 pm
content: Hello @wraper.The truth is that I've been soldering and desoldering parts on some old motherboards, and with differents temperatures, and works pretty well with the outter sleeve unconnected.Thank you very much.

author: postman
author_rank: Contributor
timestamp: September 12, 2016, 09:32:50 am
content: Hello.I've seen in another forum a conversion from Hakko T12 to JBC iron, but have been not tested.What do you think about?Thank you.Best regards.

author: stj
author_rank: Super Contributor
timestamp: September 12, 2016, 10:45:30 am
content: this may interest you.http://dangerousprototypes.com/forum/viewtopic.php?f=56&t=7218&p=61175#p61175blank pcb's are available on ebay from russia at a good price.

author: postman
author_rank: Contributor
timestamp: September 12, 2016, 11:17:37 am
content: Quote from: stj on September 12, 2016, 10:45:30 amI'm interestedI've searching on ebay but I didn't find it.So, could you share the ebay's link?Thank you.

author: stj
author_rank: Super Contributor
timestamp: September 12, 2016, 11:39:43 am
content: http://www.ebay.co.uk/itm/222238846686

author: postman
author_rank: Contributor
timestamp: September 12, 2016, 11:50:00 am
content: Thank you very much!

author: AlienBody
author_rank: Newbie
timestamp: January 25, 2019, 03:10:33 am
content: I connected C245 to controller Ve2.1S thus:

author: dreamcat4
author_rank: Frequent Contributor
timestamp: June 22, 2020, 02:32:44 pm
content: Quote from: AlienBody on January 25, 2019, 03:10:33 amHi AlienBody,Thanks for posting on our forum here. Actually I have been reading your comments elsewhere over on easy electronics RU forum (poorly translated, I do not speak any Russian).http://forum.easyelectronics.ru/viewtopic.php?f=12&t=22786&start=600Right now my problem is this:* I cannot find anywhere the controller PCB you have in the picture.* It seems like an updated revision (r2) of the 1st "V2.1" PCB.* Which is to say: only modified for adding JBC support. And not these other so-called "Ve2.1S" which is newer and looks totally different with the break out (division) on the side etc.So I cannot find this PCB anywhere, to buy one exact, or to check for an exact schematic. For where those 2 new pads are connecting. Which are marked 'JBC'.If you can dig out the seller listing from your original purchase. All that time ago. Then maybe it's not for sale anymore. But at least we can know what the words in the seller listing was. That helps a lot for searching for a newer listing. Because often seller makes a copy-paste.Thanks again, good day.