API 7600 Input Module | GroupDIY Audio Forum

Actually, this is a complete module for an API mixer. It uses 2520 modules.

Since it drops into the mixer frame (and I don’t have that) I’m going to have to test all inputs and outputs on the rear 64 pin socket. This is a bit of a nightmare. I need a schematic so that when I find an output with a signal missing I don’t spend hours trying to find out where that pin comes from. The module is a sandwich design where both top and bottom PCBs component sides are facing each other. It’s almost impossible to test it from either component side. At least, it I have a schematic, I can find components and then trace them by taking the unit apart. For service, it’s a horrible design.

I regularly service API modules but this is the first one where I simply cannot find any schematics at all. I’ve exhausted all my contacts and nothing comes up via any internet searches at all.

Hopefully someone reading this might just have what I need. As I said previously, I can keep drawings to myself (or sign an NDA if necessary as I have quite few of them with various manufacturers). Can anyone help?