Schematic / Manual Vestax PVC275

My DJ mixer died a death last year and a mate has offered me a partially working Vestax PCV-275 which sounds great but it needs a bit of love.

Anyone got any experience with these or a manual and schematic? I can find other models but that one dosen't seem to be available online.

I thought that maybe this could be a nice unit to experiment with different opamps once I get it back to working. I'm also interested if anyone has any experience with doing mods like this as the DIYaudio guys seem to think that some of these are night and day improvements over the comsumer grade ones commonly found in mixers.

Many thanks.

Yeah, I did that to the PCV-170 I had in about 2001. I've got a whole load of spares from the dead mixer though so if it's that then that's the first neck-bolt for the frankenmixer lol.

The problem is a high noise floor. High frequency artefacts which are especially noticeable on the monitor headphones.

I opened it up for visual inspection and noticed that the power supply caps had let the magic out. Replaced the 2 2200uF ones in the supply today and it still turns on (yay, I didn't kill it at least!). Sadly, the noise persists on the monitor. Haven't got around to checking if the noise on the 2 crossfader channels is still present also; just been running through the sub channel.

I've a sneaking suspicion that I'm gonna have to just work through all the boards and recap the whole thing unless someone else has a bright idea. Maybe theres a standard place of where to look upstream of a powersupply that's had the caps go pop?

On the plus side. Although many folk seem to diss whats inside a vestax all the original caps were quite nice Elnas.

As always, any help greatly appreciated and if someone should happen to have the schematic then that'd be very handy indeed.

Got the little bugger on the scope today. Seems pretty nice. No problems at all.

Took it home. Ran just headphones, no problems.

Plugged it into my ultradrive...  ...HF noise present again. I went rooting and turned up my horns; it's present without the mixer.

So in all, my ultradrive is putting HF noise out of the inputs and the outputs. I think this vestax story is wrapped up for now!

Is this the famous 'frying eggs' ultradrive thing? Anyway, it's probably time to just start another topic. Thanks to all those who have helped or offered advice.

HI do you still have this service manual or schematic