Korg Forums

[totalattack]

Hi, I recently unearthed an old ER1 I've had for years, it works perfectly except the master volume knob does nothing and it is stuck at an extremely low volume. I was wondering if anyone knew how to fix something like this? Thank you.

[roblabs]

Maybe you can start by using some compressed air on the knob, it could be residual dust. If not maybe you might have to replace the pot.

[Blue Monster 65]

DeOxit D5 or similar pot cleaner (see Radio Shack or your local electronics store) will clean it out if it's dirty.

[totalattack]

Thanks for the info. I had taken the unit apart to try to clean it if it was dirty and left the project for a few hours. I cleaned it up but cannot remember where a few of these little metal tabs go, does anyone know where I could find a photo of one of these or a diagram for putting them back together?

Thanks.

[roblabs]

I believe theyre all the same on the electribes - I recently opened up my ES-1 to check the power....if I still have the pics I will post one for you later...[/quote]

[totalattack]

Thank you, would be a huge help. I forgot to snap a pic before I took it completely apart and am regretting that.

[totalattack]

So I opened the unit and cleaned anything dirty but the output is still extremely quiet and the master volume knob has no effect, any ideas?

[Blue Monster 65]

Wait - did you physically remove the pot from the board or did you disassemble the pot?

[totalattack]

I didn't remove anything from the board. I just opened it up and cleaned things up a bit. I did not disassemble any of the pots, not exactly sure how to do that but if it would solve the problem I would open it up again.

[totalattack]

I should note that there is no scratching sound when I turn the pot, nothing at all happens, I can hear the sounds coming out faintly with the amp at full blast but the volume just has no effect whatsoever.

[sohatyi]

Do you have a multimeter? That would be helpful right now.
_________________
Korg: EMX1 (x2), ESX1, ER1, EA1, R3, MicroKorg, MicroSampler, KP2, KP3, KPMini, KO1, KP Pro
Roland: SP808, MC505, MC303
Emu: Command Station MP7, Proteus 2000, Planet Earth, Virtuoso, XBoard49
Novation: UltraNova, Nova
Yamaha: RM1X, CS2X, DX11
Other: Zoom R24, Akai MPC1000 and a couple of Omnichords

[totalattack]

Unfortunately I do not, It's on my list of things to acquire since I want to start learning more about electronics and repairing my own gear. I guess I might have to shelve this project for the moment since it was not an easy clean and fix.

[Blue Monster 65]

I was just confused by you talking about the "metal tabs."

I think Sohatyi is right: get a multimeter and we can check it out.