[Eeyore]

Scott Dorsey wrote:

Eeyore wrote:
Scott Dorsey wrote:
Eeyore wrote:
Thread title is self-explanatory.

The local venue's crossover has developed a fault where the LF outs are quite
distorted. I dare say it would likely be an easy fix but the difficulty of
obtaining a schematic is a problem.

You can't get one. But if it's BOTH LF outs, and the HF outputs are good,
you know it's not the power supply for the whole thing. And you know it's
something common to both LF outputs.

My suspicion is something like an op-amp in the filter network that's died.
Identifying the right parts to probe from a schematic would make that task a lot,
lot easier, as it would for tracing the signal through the unit.

Nahh, because you can trace backwards from the LF output jacks.

On double sided high density SMT pcbs ?

Get real Scott ! You should know very well that's not a practical task. 30 years ago or
so it was different for sure. You can't do that these days unless you have hours to
spare tracing it all out.

Graham