Bottlehead Forum

Bottlehead Kits => Eros Phono => Topic started by: ArtnShit on October 28, 2022, 09:03:39 AM

Title: High voltage level pg 55 test
Post by: ArtnShit on October 28, 2022, 09:03:39 AM

Hi,

The transformer on the A side of the board had a voltage of 257 VDC, while B side had 217 VDC. The manual says the range should be 210-230 VDC. Is this an issue or is it close enough?

Thanks in advance!

Title: Re: High voltage level pg 55 test
Post by: Paul Birkeland on October 28, 2022, 09:09:07 AM

Can you post your Kreg voltages?

Title: Re: High voltage level pg 55 test
Post by: ArtnShit on October 28, 2022, 09:18:44 AM

kregA= 1.88VDC
kregB= 2.38VDC

Title: Re: High voltage level pg 55 test
Post by: Paul Birkeland on October 28, 2022, 10:35:52 AM

I would double check that the white wires leaving the D socket are going to the correct halves of that PC board.

Title: Re: High voltage level pg 55 test
Post by: ArtnShit on October 28, 2022, 10:56:30 AM

They are in their correct areas.

Any other ideas?

Thanks!

Title: Re: High voltage level pg 55 test
Post by: ArtnShit on October 28, 2022, 10:57:00 AM

Here's a pic of the area

Title: Re: High voltage level pg 55 test
Post by: Paul Birkeland on October 28, 2022, 11:05:38 AM

I would relflow the solder joints on that board and those terminal strips with your iron turned up as hot as it will go (you can skip the LEDs though, as they take nearly no heat to solder up properly).

Title: Re: High voltage level pg 55 test
Post by: ArtnShit on October 29, 2022, 04:40:00 AM

Hi Paul,

I have reflowed everything and I am still getting 272vdc on the A tab. Any other ideas of what’s going on?

Thanks

Title: Re: High voltage level pg 55 test
Post by: Paul Birkeland on October 29, 2022, 07:21:51 AM

I believe you could continue with the build and recheck that board once the front C4S board is installed and working.  The presence of the rest of the circuit will allow the Kreg voltage to rise and allow the regulator circuit to work properly.