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Old 07-14-2017, 07:26 AM   #1
Arewethereyet
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Default Fitted daughter board, now it won't start!

Hi all, well I've assembled the daughter board from ClassicSwede but now have no spark. Ive belled out the tracks from the header pins to the cpu pins snd all are fine except one which is the first from the right when looking down onto the cicuit board from the top, that doesn't link directly to the cpu terminals (if that makes sense)
I've belled between capacitors, resistor, the via holes and all seem fine.
Where does that short track mentioned above go to, as I cant work it out. Would that cause a no start whether the jumper in place or not?
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Old 07-14-2017, 10:26 AM   #2
EivlEvo
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What car?
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Old 07-14-2017, 11:23 AM   #3
turbotankshane
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Have you checked to see if you have spark at all?
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Old 07-14-2017, 12:13 PM   #4
thismachine13
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This is why I decided to go with the Yoshifab daughter board that is already assembled. I was concerned I would get something wrong building it up.

Hopefully you get it sorted.
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Old 07-14-2017, 09:50 PM   #5
itsacrazyasian
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its nice to know im not the only one experiencing this problem. i just went through the same problem.

I have a excellent workstation at the university and a heated solder extraction gun. im actually pretty good with electronic repairs and ive rechecked all my solder points and everything checks but my car wont start with the jumper in either position, or with a chip in it.
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Old 07-16-2017, 04:18 AM   #6
Arewethereyet
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1. 940 lpt
2. No spark, thats why it wont start
3.Me too
4. Great, if this is what happens then why is there no trouble shooting guide?
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Old 07-16-2017, 03:41 PM   #7
Arewethereyet
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I took the small chip out of the db and now it starts at least.
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Old 07-16-2017, 05:18 PM   #8
classicswede
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PM sent for details
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Old 07-16-2017, 08:57 PM   #9
itsacrazyasian
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Mine did the same thing did i have the thing in backwards?
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Old 07-16-2017, 09:04 PM   #10
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i most certainly have my sockets and chips in correctly...
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Old 07-16-2017, 09:06 PM   #11
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Sure sounds like the daughter board is offset or flipped around -- can you post a picture of your installed board? (or a plain link to a PBsux picture)
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Old 07-16-2017, 10:15 PM   #12
itsacrazyasian
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trying to put photobucket app on my phone but the daughter board has a trace for the sockets

http://forums.swedespeed.com/showthr...d-instruction!

my finished product looks exactly like this.

also my car starts with the jumper on 2-3 with no chips on the daughterboard... strange
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Old 07-16-2017, 10:55 PM   #13
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Please confirm that pin 1 of your daughter board goes into the EZK pcb trace labelled T741 as shown in this picture, and that there is one empty hole on the EZK pcb at the other end of the daughter board connector (on the left side when the db is facing you). (The original connector on the EZK PCB is 23 pins, with pin 2 blocked as a key, and pins 1 and 23 as a guard trace. The blabla daughter board only connects to the inner 20 of the 23 pins.)
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Old 07-17-2017, 05:58 PM   #14
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damn... now to desolder the db from the mainboard.
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Old 07-17-2017, 09:42 PM   #15
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Sorry to be the bearer of bad news....

The owner of those build instructions should really update the instructions and post better pictures showing the empty hole on the left side (or should photoshop the existing pictures to "fill" that hole so that the alignment is easier to see).

If it were me, I'd cut all the header pins and then remove the cut pieces one-by-one from both boards. You'll need to find a replacement header but it should be cheap compared to the risk of lifting a trace and damaging a PCB. You want a: 0.1" male right angle single row header, 20 or more pins. They're ~$0.10 each from china in quantities of 50. I don't know if there's a place that has cheap shipping (aka postage stamp) for small quantity low cost parts.
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Old 07-17-2017, 10:17 PM   #16
itsacrazyasian
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i think there are some at work. just still not looking forward to it but i'll make it happen.
thanks for the help i cant wait to put my turbo ezk chipped in my car. i just swapped in a turbo clutch so im extremely giddy.
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Old 07-18-2017, 07:35 AM   #17
classicswede
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Thanks for the info I have quoted your post on swedespeed and will also stress this in the instructions.

I owe you a pint

Quote:
Originally Posted by bobxyz View Post
Please confirm that pin 1 of your daughter board goes into the EZK pcb trace labelled T741 as shown in this picture, and that there is one empty hole on the EZK pcb at the other end of the daughter board connector (on the left side when the db is facin
g you). (The original connector on the EZK PCB is 23 pins, with pin 2 blocked as a key, and pins 1 and 23 as a guard trace. The blabla daughter board only connects to the inner 20 of the 23 pins.)
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Old 07-19-2017, 03:04 PM   #18
Arewethereyet
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And me. My board was also one pin over. Got a new 36 pin header from Maplin for £1.99. Hopefully the tracks of my boards will take another desolder/resolder.
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Old 07-19-2017, 05:21 PM   #19
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Quote:
Originally Posted by Arewethereyet View Post
And me. My board was also one pin over. Got a new 36 pin header from Maplin for £1.99. Hopefully the tracks of my boards will take another desolder/resolder.
flux + wick

should be able to resolder forever (unless your tip / iron is junk)
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Old 07-19-2017, 05:24 PM   #20
swedefiend
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I have no idea exactly how many pins you guys need.

But, this is a great site. I have not ordered from there yet but they have been around forever.

Great resource for Raspberry Pi and Arduino, lots of sensors, etc...
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Old 07-19-2017, 05:59 PM   #21
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I get those bent header things at my local Surplus Gizmo's myself. Right by the Sillycone Forest they call it over by Hillsburro where they make all the puter thinga ma jigs. Usually you just cut the extra pins off those bent header delios so they are then the correct number of pins....

www.surplusgizmos.com

I'm still confused as to where the extra hole is and how come there isn't a good pic of the correct way to solder it in?? I can't see the holes on the main board in the pic posted at all.
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Old 07-19-2017, 08:07 PM   #22
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Hey Babbs! Don't be giving away my top sekret electronics source!
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Old 07-19-2017, 08:54 PM   #23
itsacrazyasian
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i redid mine today, still no start with chips installed.

running it in stock configuration for now. tired of the na ezk making the car ping like crazy.
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Old 07-19-2017, 08:59 PM   #24
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Here's another picture from sweedespeed

If you count holes starting from the left, you'll count 21 holes a gap and the hole with a "1" over it. The daughter board is 20 pins. When installed, the hole on the left should still be empty.

(It actually looks like the db was mis-installed in this sweedespeed picture
)

If anyone's interested, it should be simple to add a couple switches with the daughterboard to switch between EZK images -- maybe a premium vs. cheap gas switch? Your chip supplier would need to understand how to put multiple images on a single chip for this to work, and you could only switch images when powered off (although switch-on-the-fly is possible with an extra chip added).
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Old 07-19-2017, 09:06 PM   #25
itsacrazyasian
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I'm glad to know that it wasn't my goof trying to follow a guide. My first pin is in the T741 trace. My joints look good, i cut the 20 pin header off the main board, then cut the black plastic between the pins and pushed the pins through the hole. Went through sucked the solder back out and installed the DB again with the correct alignment.
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