Bottlehead Forum

Bottlehead Kits => Crack => Topic started by: StivVid on April 10, 2016, 11:52:47 AM

Title: 1 Speedball LED not lit. [resolved]
Post by: StivVid 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?

Title: Re: 1 Speedball LED not lit.
Post by: StivVid 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.

Title: Re: 1 Speedball LED not lit.
Post by: StivVid on April 10, 2016, 12:37:05 PM

That was it.  Sorry, everyone.  Just wasn't paying attention to part orientation.