Icon Designs A4 Mixer - Electronic Circuits Projects Diagrams Free

**Nigel Goodwin** · 21st October 2004, 09:48 AM

I've just bought one of these Icon Designs A4 Mixer's cheap off Ebay, with no PSU. I've got the PSU sorted out, using a 15-0-15V mains transformer, but there's a couple of small faults on the mixer as well.

Does anyone have a circuit diagram for it?, it would make life much easier

williB · 22nd October 2004, 03:56 PM

the guy you bougt it off of had no specs on it ?

**Nigel Goodwin** · 22nd October 2004, 04:28 PM

Quote:

Originally Posted by williB

the guy you bougt it off of had no specs on it ?

No, just the mixer, no PSU or anything - but it was cheap :lol:

I've fixed it now without a circuit, there was an open circuit PCB track causing channel 2 not to work (+ve supply missing to the first opamp), and on channel 1 the bass control didn't work, the pot track is actually broken. I've swapped it for the mono output level pot, and it works fine.

I just need to try and find a suitable replacement pot now!.

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21st October 2004, 09:48 AM	(permalink)
Nigel Goodwin	Icon Designs A4 Mixer I've just bought one of these Icon Designs A4 Mixer's cheap off Ebay, with no PSU. I've got the PSU sorted out, using a 15-0-15V mains transformer, but there's a couple of small faults on the mixer as well. Does anyone have a circuit diagram for it?, it would make life much easier __________________ PIC programmer software, and PIC Tutorials at: http://www.winpicprog.co.uk

22nd October 2004, 03:56 PM	(permalink)
williB	the guy you bougt it off of had no specs on it ?