new speedball upgrade blowing fuses

Erekj3775 · 1013

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Offline Erekj3775

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Reply #15 on: January 23, 2025, 04:47:53 AM
I reflowed the solder to the points you showed on your picture.  I did get some different values this time, but realized I had switched OA and OB in my description.  OB is the point that is low on the large board not OA.  Here are my values now and I have also taken values at 7U and B3.  I now only have one led on large board that lights up.  It is the right one below the ground on the large board.  Here is a pic of the back of the large board after solder work

OA - 137.6V
OB - 1.5V
G - 0V
B+ - 205.9

B3 - 1.6V
7U - 1.5V

Thank you again for your help



Online Paul Birkeland

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Reply #16 on: January 23, 2025, 08:18:32 AM
Can you let me know which solder you're using and what iron?

There's something very wrong with either the iron or the solder being used, and ultimately you are going to need a new board to get this to work (it looks like you've lost a pad on one of your 2N2222 solder pads).

Either there is lead free solder being used here, or your iron is way too cold, possibly both.

Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man


Offline Erekj3775

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Reply #17 on: January 24, 2025, 05:06:27 AM
The solder i am using is Maiyum 63/37 flux core solder in .8mm and 1mm.  The solder iron I have is the Yihua 926 III solder station.



Online Paul Birkeland

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Reply #18 on: January 24, 2025, 05:22:54 AM
Try turning the heat on the station up all the way, that will likely help a lot.

Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man