MB-6582 problem

[lead bromide]

Hello Midibox forum!

I've got two working SID pairs in my MB-6582, but the right channel SID for PIC02 plays a quiet triangle wave when I bridge pins 8 and 27 when I run the test tone applicatoin. But, when I put the SID in no tone plays. Voltages are correct, I get 9.02V when I bridge 14 to 28. I've looked around both the MBSID section and the User Projects section but couldn't find what I am looking for. Has anyone experienced a problem like this?

Thanks,

Alex

[Wilba]

Please clarify some things...

Core 1 and Core 2 work OK?

Core 3 left SID works OK?

Core 3 right SID, testtone with SID makes no sound?

Core 3 right SID, testtone with pin 8/27 bridge makes "quiet triangle wave"?

(Is this sound different to testtone with pin 8/27 bridge in other Core/SID modules? It should be 1kHz square wave, not triangle.)

A different sound from the audio out buffer (different to others) suggests the audio out buffer is not working. Check for bad joints, correct components, etc. in this area.

You could also try testtone with a bridge of pin 8 from the left SID (which you say works) to pin 27 of the right SID (which you say does not work).... and vice versa. This would identify if the track between the PIC and pin 8 is working or not.

[lead bromide]

Thanks for the speedy response Wilba!

All the cores work and I have uploaded testone app to each one. Testtone runs correctly on each core/SID pair, except for core 3's right SID, which produces the right tone, just very quiet.

I just tried bridging pin 8 on the left SID to pin 27 on the right SID and I still got the same quiet tone so I will spend some time tomorrow examining the solder joints and to see if I happened to misplace a component.

Thanks,

Alex