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Chameleon Labs 7602 MkII Repair

Hi all,

I'm repairing a couple of 7602 MkIIs, each with their own problems. Does anyone have experience with those or maybe even have access to a schematic or service manual? I have looked at some Neve 1073 schematics, since it's supposed to be a clone of those, but there seem to be enough differences outside of the tone circuitry that they're not terribly helpful.

One of them has a ground hum, and the other has a volume drop when using the HPF set at 50 Hz. A schematic would make the ground hum hunting a ton easier. I also tried powering on the one with the HPF issue and I'm not even getting the LEDs lighting up. I'm hoping that I don't have to figure out the circuit on the power board to track that issue down, so a schematic would come to the rescue again.

Any help would be much appreciated. Thanks!

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Profile picture for user Link555
Member for
14 years 2 months

Link555 Wed, 01/20/2021 - 21:13

sometimes they float pin one and don’t connect it to chassis. It can create a buzz. Is that pcb on the output or is it an input pad?

Profile picture for user doghouseamps
Member for
5 months

doghouseamps Thu, 01/21/2021 - 13:20

Ah, gotcha. No, that's the mic input. I see the behavior even when using the DI on the front of the unit. The center XLR is line in, and the XLR on the left is the output.

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