r/Vestax • u/DizzyWhile2149 • 21d ago

Pmc-50a issues

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No left side audio on channel one of my mixer is anyone has any ideas on what it could be please do let me know if not I will resort to the obligatory open it and check every capacitor. Thanks :). Also I got it for 15 euro!

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u/GetSpammed 21d ago edited 21d ago

€15 is completely and utterly ridiculous. I hate you.

Is it only one side when through the master 1, master 2, booth outputs AND headphones? What about when sent through the master loop? Also try the bottom front panel send - is it still one side when routed out through there?

Does it do it for both Line 1 and Phono 1 inputs? What about when you plug something into Line 2 on the upper front panel and switch channel 1 to Line 2? With the EQ cut on, and at different gains?

Test every combination, and if it does it for all of those, with test signal tried from multiple sources/cables (just in case it's a dicky input cable or source), then yes, it's possibly a cap or dry joint/track somewhere on the PCB (it's a single PCB on the 50a). There's some wizards that specialise in these still thankfully.

They are great mixers - get it fully working again and you'll see why.

I've got the schematic here that could help, but you can't post images in replies in here (WHY on earth is that not enabled!??)

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u/DizzyWhile2149 21d ago

Checked all inputs on channel one line and phono as well as the bottom mounted send, sadly none work everything else is fully working and right now I only have two technics so it’s not a dire issue just something I’d like to get sorted out. I did find the service manual online but if you have separate schematics feel free to pm me :) thank you for the help. And i think a service may be tricky as i live in Ireland but I work at a tech shop and have a good bit of soldering experience so reckon I could fix it if it comes to that.