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Dan's PNP RB25DET R33 Skyline ECU PCB 
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DIP8 - Involved

Joined: Mon Apr 08, 2013 8:01 pm
Posts: 24
For desoldering a connector you could also use a heat gun.


Thu Jan 30, 2014 6:18 pm
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LQFP112 - Up with the play
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Joined: Sat Sep 29, 2012 9:16 pm
Posts: 148
Location: Rotterdam, the Netherlands
Still difficult to get enough pins heated at the same time on those big ECU connectors.

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Fri Jan 31, 2014 9:37 am
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QFP80 - Contributor

Joined: Tue Feb 12, 2013 5:43 am
Posts: 57
Location: Scarborough, ON
I use an electric skillet to reflow my little boards. The same principle should work for dismounting a connector - melt all the solder at once, lift off the device. You may need a helper to hold the board still.

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Fri Jan 31, 2014 7:28 pm
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TO220 - Visibile

Joined: Sun Jan 12, 2014 12:31 pm
Posts: 9
the 76-pin connector could be removed easily...


Sat Feb 01, 2014 10:06 am
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LQFP144 - On Top Of The Game
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Joined: Tue Mar 02, 2010 2:33 pm
Posts: 1201
Location: Australia
OK so I have found the issue relating to why I cannot communicate via the BDM interface.

I hate to admit this, but I soldered the damn cpu IC incorrectly oriented (ie. pin 1 was not where it should have been).

Several EPIC LOL's later at my n00b-ish failure, I managed to damage the pcb removing the cpu IC.

I had two alpha pcb's here, so I started fitting a new cpu IC to the second alpha pcb.

EPIC failure again as I managed to pick a damaged IC out of my component tray and didn't realise until I had soldered most of the pads.

I then proceeded to damage the second pcb whilst attempting to remove the cpu IC.

So...... long story short, I have identified the problem (which is me, the assembler, and not any fault of the pcb).

I will be pushing some minor changes to the pnp pcb in the very near future to correct some component placements that I don't like. (ie. they come close when fitted to the stock ecu enclosure)

More PCB's will be ordered after those changes are made and as a result of my n00b-ness....... (this will happen today/tomorrow)

Fuck I feel like a complete n00b........ shit happens I guess :-P


Sun Feb 16, 2014 3:35 am
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Joined: Tue Jan 15, 2008 2:31 pm
Posts: 14871
Location: Home sweet home!
ROFL! Respect for having the balls to tell the world! :-D People make mistakes, even perfect people like you ;-)

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Sun Feb 16, 2014 3:38 am
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LQFP144 - On Top Of The Game
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Joined: Tue Mar 02, 2010 2:33 pm
Posts: 1201
Location: Australia
I'm far from perfect LOL

I am happy it was my mistake and not a fault on the PCB though :-)

Pushing changes soon and then I will be placing another small PCB order :-)


Sun Feb 16, 2014 3:48 am
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Joined: Tue Jan 15, 2008 2:31 pm
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Location: Home sweet home!
Good stuff! Keep it up :-)

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DIYEFI.org - where Open Source means Open Source, and Free means Freedom
FreeEMS.org - the open source engine management system
FreeEMS dev diary and its comments thread and my turbo truck!
n00bs, do NOT PM or email tech questions! Use the forum!
The ever growing list of FreeEMS success stories!


Sun Feb 16, 2014 8:21 am
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LQFP144 - On Top Of The Game
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Joined: Tue Mar 02, 2010 2:33 pm
Posts: 1201
Location: Australia
Decided not to do any changes to the alpha PCB design yet.

Just asked for a quote from my Australian PCB supplier.

Should be ordering another small pcb batch today! :-)


Sun Feb 16, 2014 10:34 pm
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LQFP144 - On Top Of The Game
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Joined: Tue Mar 02, 2010 2:33 pm
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Location: Australia
Two more alpha boards are ordered! they are being shipped tomorrow, should have them Thursday *fingers crossed* :-)


Mon Feb 17, 2014 7:05 am
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