1 Speedball LED not lit. [resolved]

StivVid · 1660

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Offline StivVid

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on: April 10, 2016, 11:52:47 AM
Hello all.

Just finished wiring the small board from the Speedball kit to my Crack.  When I power up to do voltage checks, I get 3 LEDs lighting up.  The LED nearest the IB terminal on the board remains dark.  Voltage check readings are as follows:

OA=  72
IA=  184.2
B-A/B=  0
IB=  184.3
OB=  59.1

Anyone have a diagnosis?
« Last Edit: April 12, 2016, 01:57:44 PM by Caucasian Blackplate »


Offline StivVid

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Reply #1 on: April 10, 2016, 12:05:35 PM
Never mind...  I think I see the problem.  B side transistor installed backwards.  I'll flip that and see if it fixes things.


Offline StivVid

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Reply #2 on: April 10, 2016, 12:37:05 PM
That was it.  Sorry, everyone.  Just wasn't paying attention to part orientation.


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