Sammich SID problem, please help!

MIDIbox SID
,
1

Hi! Long time no speak. 

So, I plugged in my Sammich after a 3 year break (I know, I’m sorry), and there’s an issue. There is only some odd low level sounds. At one point I actually heard something like the SID, but it disappeared.

On opening up the box I found that the SIDS are REALLY hot when powered, like they burn to the touch. Any ideas, or starting points for investigation?

It’s a pair of 8580’s, 1A linear PSU, and it was working before. The mods are the potentiometer mods to A0-A4.

Many thanks!

 

 

SID.jpg.729245d5d227042b8952a5843338e8eb.jpg
SID.jpg.729245d5d227042b8952a5843338e8eb.jpg1947×974 425 KB

2

What are your voltages at the regulators and at the vcc on the pic and at the 8580? I would make sure you  have your voltages set properly. You can test with the sids out so you do not burn them. If the voltage is low you may have a short or have a bad solder or bad component somewhere to find. Maybe you are using the wrong power supply as well. That could be causing a lot of extra heat if the regulators have to dissipate a higher voltage as heat.

3

http://www.midibox.org/dokuwiki/lib/exe/fetch.php?media=projects:sammichSID_build_guide_v1_0.zip

There is a good picture in the build guide of what voltages should be where.

4

Fantastic, thanks for your help, I’ll do some testing and report back!

Cheers

5

OK apologies, that took a little while.  6 years and 3 children later, I’m back.

So Voltages match the build guide, with the exception that 12V reads as 10.86. the guide suggested this would be ok.

Any ideas?

 

Thank you!

6

On 5/19/2024 at 1:06 PM, lazenbleep said:

OK apologies, that took a little while.  6 years and 3 children later, I’m back.

So Voltages match the build guide, with the exception that 12V reads as 10.86. the guide suggested this would be ok.

Any ideas?

 

Thank you!

Try to replace sids with cheaper alternatives like swinsid

7

On 5/19/2024 at 12:06 PM, lazenbleep said:

OK apologies, that took a little while.  6 years and 3 children later, I’m back.

So Voltages match the build guide, with the exception that 12V reads as 10.86. the guide suggested this would be ok.

Any ideas?

 

Thank you!

Congrats on the 3 kids!

My 8580s were failing a lot and it got expensive. So I swapped them out for the FPGA SID alternative. It sounds great and I’m satisfied. That’s just me ofc.