hakko FX888D SCHEMATIC - Page 1
Forum section: electronics / projects

author: benjamin1981
author_rank: Newbie
timestamp: February 26, 2014, 11:56:36 am
content: Can anyone share circuit schematic for the Hakko FX888D soldering station? My soldering station is just a year old and already dead. I was working at higher temperatures and within a few minutes smoke stated coming out of the controller box. I opened the soldering station and noticed that a few components on the PCB got cooked up including a 24 pin QFP IC.Thanks

author: dannyf
author_rank: Super Contributor
timestamp: February 26, 2014, 12:27:01 pm
content: Not likely that you will fix the qfp part.

author: p5200
author_rank: Contributor
timestamp: February 26, 2014, 12:27:46 pm
content: Quote from: benjamin1981 on February 26, 2014, 11:56:36 amOH NO! I hate to hear that, I just received the one I ordered yesterday.I hope you get it fixed and I will also, be following your thread. Good luck!

author: p5200
author_rank: Contributor
timestamp: February 26, 2014, 12:36:20 pm
content: I found this.https://www.google.com/search?q=hakko+FX888D+SCHEMATIC&client=firefox-a&hs=jzz&rls=org.mozilla:en-US:official&tbm=isch&tbo=u&source=univ&sa=X&ei=5t4NU6S6KILvqwH71oGYCg&ved=0CDwQsAQ&biw=1024&bih=635

author: amyk
author_rank: Super Contributor
timestamp: February 26, 2014, 12:39:37 pm
content: What's the marking on the IC? If it's a genuine Hakko, it's a custom part and basically unobtanium. They might try to sell you a whole new PCB. Ironically (pun intended) if you had a fake, clone, it might've been something more common... but still not as reliable and easy to fix as the old analogue controller.Some pictures would help us see what happened.

author: p5200
author_rank: Contributor
timestamp: February 26, 2014, 12:45:37 pm
content: What temp. were you working at?

author: Joule Thief
author_rank: Regular Contributor
timestamp: February 26, 2014, 12:56:07 pm
content: Some models can be fixed for $8.99http://www.ebay.com/itm/231064062349?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649

author: TorqueRanger
author_rank: Frequent Contributor
timestamp: February 26, 2014, 12:59:06 pm
content: Quote from: benjamin1981 on February 26, 2014, 11:56:36 amI tried finding finding the schematic a while ago in order to build my own iron setup.. But a couple years ago I found the manual in English it was no help but when I looked at the Chinese version I found an e-mail for the schematics and repair manual ....

author: saturation
author_rank: Super Contributor
timestamp: February 26, 2014, 01:22:06 pm
content: Call Hakko USA to see if they'll honor the warranty, they also stock all the parts. This is the first time I've heard of any Hakko burning up.

author: benjamin1981
author_rank: Newbie
timestamp: March 07, 2014, 11:15:32 am
content: Sorry for the delayed response.1) It is a genuine hakko product.2) I have attached a pdf file with pics. Components IC2 and Q6 are damaged.3) I was working at max temperature (450 deg C perhaps) for 10 minutes when it malfunctioned.Would really appreciate if someone could provide a fix or circuit schematic.Thanks.

author: amyk
author_rank: Super Contributor
timestamp: March 07, 2014, 12:05:55 pm
content: I will conclude that it's genuine as well, the PCB matchessomeone else's FX-888Dand we now know that the microcontroller it uses is a Renesas R5F1007C (i.e. the good thing is that it is NOT a custom Hakko part - but still Japanese so unlikely to be a Chinese clone). The datasheet is here and it shows the burnout occurred at the Vss/Vdd pins:http://documentation.renesas.com/doc/products/mpumcu/doc/rl78/r01ds0131ej0310_rl78g13.pdfUnfortunately this MCU is still basically unobtanium. (Note that this post appears to be the first time the actual one used in the FX-888D has been mentioned on the Internet.)Now why would you need 32KB of flash to control a soldering iron...

author: C
author_rank: Super Contributor
timestamp: March 07, 2014, 04:07:45 pm
content: Quote from: amyk on March 07, 2014, 12:05:55 pmProbably some little thing like more space for a better control of the temp.They might be doing something simple like watching how fast the temp is changing.On heat up this could give the control program an idea of how much mass the current tip has and what adjustments to make to make control hold a temp better.While soldering this could give a hint of what is being soldered like to 30 gage wires or something to a huge ground plane.Or something simple as updating the control program while keeping the current control program functional in case something goes wrong during the update.According to Renesas's site it's only a $0.10 to $0.40 cost difference.C

author: nanofrog
author_rank: Super Contributor
timestamp: March 07, 2014, 05:52:17 pm
content: I hope it's actually still under warranty, and let Hakko sort it out for you. If not, you'll have to see if they'll sell you the parts or the board that's toast (given the cost of the station though, it may not be all that cost effective).I wish you luck with it.

author: dannyf
author_rank: Super Contributor
timestamp: March 07, 2014, 05:58:30 pm
content: Quotefloating point math in PID?

author: ajb
author_rank: Super Contributor
timestamp: March 07, 2014, 08:22:41 pm
content: Quote from: dannyf on March 07, 2014, 05:58:30 pmA bunch of look-up tables for unit conversions or ADC-to-degrees translation?