no audio left ear after speedball instalation

Opal · 4858

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Offline Opal

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on: May 18, 2023, 06:48:27 AM
I just install the speedball, and I do not have sound in the left ears, I did have sound in the left ear before the instalation. All voltage test on the small board pass but on the big board the voltage is higher

OA = 127
OB = 133
G = 0
B+ = 220

The LED are on


Offline Paul Birkeland

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Reply #1 on: May 18, 2023, 09:07:06 AM
That is unlikely to cause  one channel to not work.  What are the small board voltages?  Can you post some build photos?

Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man

Offline Opal

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Reply #2 on: May 18, 2023, 10:26:40 AM
Now some DEL are not turning on.  Those DEL were turning bright red as soon as a plugged the power, while the other we slowly turning on. Now they do not.


Offline Opal

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Reply #3 on: May 18, 2023, 12:35:36 PM
small board voltage
OA = 87
IA = 204
B- A/B = 0
IB = 204
OB = 76


Offline Paul Birkeland

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Reply #4 on: May 18, 2023, 02:38:25 PM
Your 2N2222 does not appear to be properly installed.

Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man

Offline Opal

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Reply #5 on: May 18, 2023, 04:07:44 PM
Did the fix, but no LED lights. I redid all the solder on the board. Still no LED lights.

Voltage still the same


Offline Paul Birkeland

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Reply #6 on: May 18, 2023, 04:11:36 PM
Can I see what the bottom of the big Speedball board looks like?

Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man

Offline Opal

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Reply #7 on: May 18, 2023, 04:17:43 PM
Here it is


Offline Opal

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Reply #8 on: May 18, 2023, 04:34:54 PM
Close up of the 2n2222 connection


Offline Paul Birkeland

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Reply #9 on: May 18, 2023, 04:48:39 PM
If you are using lead free solder, get some solder with lead.  If you are using leaded solder, you need more heat to get solid solder joints. 

Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man

Offline Opal

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Reply #10 on: May 19, 2023, 03:12:51 AM
I give up, I resolder everything for the 5th time and the LED are just not ligthing up. I m using solder with lead in it, and i did apply more heat, yet i still have the same issue


Offline Opal

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Reply #11 on: May 19, 2023, 03:15:13 AM
Here is the latest solder


Offline Paul Birkeland

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Reply #12 on: May 19, 2023, 04:12:58 AM
I would replace the 2N2222 that was improperly installed just to be safe, as it may not have survived its previous installation.  Also be aware that the center legs of the TIP50 transistors take a lot of heat to solder properly.

Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man

Offline Opal

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Reply #13 on: May 19, 2023, 04:59:04 AM
It just keeps getting worse. Now one of the LED that was working before does not work anymore. I have not touched any soldering on that side.


Offline Opal

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Reply #14 on: May 20, 2023, 07:39:39 AM
Ok i talked to a professional and he did confirm that the 2N2222 was busted. I got a replacement but we cannot get it solder properly because I made a mess of the circuit board. Is it possible for me to order another one with some replacement pieces ?


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