[ernestoRParticipant]

Safety risks — and I’m not sure, how reliable the original PSU is, seems to have issues for others as well. And also because of curiosity — want to play and try and learn a bit more …
;–)
E.

[ernestoRParticipant]

Yes, I did, the orange wire is GND as expected (it’s connected to several IC’s GND pins).
It’s working well now – except for the phantom power, where I need some additional circuit; my external PSU does only provide 2x12V. But I already found a good solution from ElliotSoundProjects (https://sound-au.com/project193.htm) — BTW: a lot of well designed and explained audio projects and basic knowledge articles there!

Thanks so far!
Best regards
E.

[ernestoRParticipant]

Hi Keith, thanks for this information, I understand. But just because of safety issues my plan is to apply power from an external unit instead of repairing the original one. I only want to make sure where and how to apply ground wire. I’m an engineer in electronics; I understand the risks and love my life!
It’s a pity that my original PSU unit just had the exploded IC (please refer to image above); the ZED6 is a quite good device IMHO.
Best regards!

[ernestoRParticipant]

Hm, thanks for sharing this. At least in my case it looks a bit different. The orange wire (in zedb.jpg and zedc.jpg) seems to be Ground — but in my ZED6 there was no separate Ground wire, I’m quite sure. Is it possible that Ground connection is realized differently in ZED6? Master PCB had only three wires connected: red, blue and pink as in zedg.jpg, but not the orange one.
Is it possible to make a direct Ground connection from my new PSU to the so far unused P13 on Master PCB? I’m hesitating a bit to just try it because I do not want to blow up my nice ZED6 …

Thanks for any further help!

p.s.: attached the blown up IC

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[ernestoRParticipant]

Hi, thanks to ANH for sharing the images; the same PCB seems to be used in ZED6. I had to remove it from my recently bought ZED6 mixer because U1 (is it a TNY 187?) was exploded. Now I wanted to apply external power supply. Unfortunately I did not note down all connections between the PSU PCB and the Master PCB. IIRC there were only three connections from P1 (+48V), P6 (+12V) and P12 (-12V) on the PSU to the Master PCB’s P7, P10, P14. Can anyone help me with the correct cabling? May be with the Master PCB schematic or so?
Thanks a lot in advance!
Bets regards
Ernesto

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