Bottlehead Forum

Bottlehead Kits => Eros Phono => Topic started by: figby on May 08, 2022, 07:14:16 AM

Title: Final Voltage Check Variances **Fixed**
Post by: figby on May 08, 2022, 07:14:16 AM

Any ideas on what's going on? I'm getting some out of range voltage readings all from one side of the C4S board.

IA - 216V
IB - 218V
OA - 149V
OB - 163V
OC - 140V
OD - 98V
OkA - 139V
OkB - 98V
OkC 1.5mV
OkD 1.55V

The Resistance Check came back all good.

Thanks!
Kevin.

Title: Re: Final Voltage Check Variances
Post by: Paul Birkeland on May 08, 2022, 02:39:10 PM

Is OKC really 1.5mV?  Is the 10,000uF cap backwards on that side?  Maybe post some build photos...

Title: Re: Final Voltage Check Variances
Post by: figby on May 09, 2022, 04:40:28 AM

Thank you for the pointer on where to look, I found the issue. It wasn't the 10,000uF cap but I had neglected to do this step:

"Insert the other lead into A3, and continue with that lead to 4L"

Inexplicably, I had trimmed the lead at A3 and there was no connection to 4L. Made the correction and here are my voltages now. So much better.

IA - 218V
IB - 218V
OA - 162V
OB - 163V
OC - 98V
OD - 98V
OkA - 98V
OkB - 98V
OkC 1.52V
OkD 1.55V

Many thanks for the help!
Kevin.