Roksan Kandy MKIII - powers up fine, switches inputs OK, but no output to speakers or phones. Any ideas? Mark

Please confirm make and model.

Very likely the power amp output transistors are shorted and need to be replaced. The fuses provide power to these transistors. To verify this diagnosis, (with the speakers disconnected and the unit unplugged, of course!), check for continuity between the fuse terminal and the speaker output at the amplifier board (before any protection relay). If you have continuity (< 1 ohm resistance), the transistor is bad. Most power amplifiers have one transistor to the DC+ power supply and another to the DC- power supply. Both are connected to one speaker terminal, and the other speaker terminal goes to power supply ground. If one transistor shorts out, it overloads the other transistor and fries it as well. Even if it tests good, it's probably been damaged and is likely to short and ruin the new transistor, so replace both at the same time. The foregoing holds true if the output transistors are inside a power amp module.

Note: check your speaker wiring (both ends) after repairing the amplifier. A stray strand at the speaker connector shorting to the other terminal or ground can destroy the output transistors. I once had a customer who had too much bare wire exposed on the ends of his speaker wire. It was fine until his wife turned the speaker upside down during cleaning and twisted the bare wires together (and forgot to right the speaker afterwards). He bought fuses and transistors ...

There are way too many components to narrow it down. Could be a noisy switch, an intermittent speaker relay, etc, etc. If you would like to have it repaired, please visit my website at audioserviceclinic.com. Sorry no one answered your question before.

plug the bars out plug whatever to the pre in, then the remote out to the power amp.

If the remote controls everything else and works otherwise correctly the fault is most likely to be the volume control drive motor. Roksan will fix it for between 100 and 150 pounds I should think, or you could order the part and do it yourself. There are general modifications that Roksan do as standard to all amps of different ages, parts that are known to break down with use and time, to avoid future repairs.

Is the amp switching by it self or does it not switch at all? I'm sure you are awear that the mode light should be red when "on" and green when amp is "off". If you can switch but no sound, than the 2 F6,3A fuses can be broken and most likely one or two of the output transistors shortened.

does anyone have a schematic for this amp? I need one to fix a problem

Assuming they have compatible outs and ins, why not? Manuals help.

In any 'connection' question there are at least two participants and specific answer require specific details.

Any good at sodering?
You have a bad solder joint somewhere!

I would replace or have replaced all the Large Electrolytic Capacitors in the power supply section of the amp and see if that solves the problem.