Speedball Installation - Wrong voltage small board

[RSpies]

Hi,
Just started the Speedball upgrade to my Crack and I am not getting the correct voltages when I add the first small board.  The Crack was working well before I started so I suspect the problem is with the board or the attachments. 

Voltage check showed:
OA          78
IA          147
B-A/B      0
IB          147
OB        136

The LEDs on the left (looking from the volume pot end) glow, but much weaker than the two on the right.

Where should I be looking for the problem?

Thanks

 

[Deluk]

There are quite a few connections on the board that haven't flowed properly. Should all have a neat little "mountain" with an inverse meniscus. i.e. not a blob. They just need a bit of heat from a properly tinned iron and then just a small amount of solder to reflow them. Can't say which one will cure your problem, maybe none of them, but they need doing. Do the same at the tag strip.

 

[Paul Birkeland]

I would agree, more heat, especially on the center legs of those MJE-350's.

 

[RSpies]

Thanks, I resoldered some of the connections and it works now. The second and fourth points are now in around 160-161 instead of 170-190.  I assume that is close enough not to be concerned.  I don't notice any problems listening to it.

 

[Paul Birkeland]

Sure, those aren't particularly disturbing.  The important voltages are at T1, T5, T7, and T9, with the rest of the high voltage terminals (2, 4, B2, B5, etc) all dropping a bit more than usual as you install each piece of the Speedball.

-PB