Volume pot issue?

[audiotaxi]

Hi all, new to the forum.


Bit of a mystery problem with the new PRS I just acquired.

When the coils are tapped, the volume pot still bleeds sound through the amp, even when fully off. On full humbucker mode, the volume pot works fine

Anyone experienced this or have any clue? I thought it must be the pot, but then surely it wouldn't work properly when tapped or otherwise?

[big_teee]

Hi all, new to the forum.


Bit of a mystery problem with the new PRS I just acquired.

When the coils are tapped, the volume pot still bleeds sound through the amp, even when fully off. On full humbucker mode, the volume pot works fine

Anyone experienced this or have any clue? I thought it must be the pot, but then surely it wouldn't work properly when tapped or otherwise?

Welcome:
You might see if you can find a wiring diagram for your model, and see if there is a wiring error.
Is this a new guitar with warranty?
What is the Prs Model?

[the great waldo]

Probably a duff pot. Does it do it on both pickups ?

Cheers

Andrew

[audiotaxi]

Hey guys

Terry, it's a Singlecut trem, which has the mccarty wiring. I've downloaded the schematic, and to my eyes it looks ok. I don't think it'll be under warranty as it's technically used as the original buyer returned it after a short time. Maybe this is why!

Andrew, yes it happens on both pups. It's just curious how it only happens when the push/pull on the tone pot is "pulled" for split coils..

[big_teee]

Hey guys

Terry, it's a Singlecut trem, which has the mccarty wiring. I've downloaded the schematic, and to my eyes it looks ok. I don't think it'll be under warranty as it's technicaly used as the original buyer returned it after a short time. Maybe this is why!

Andrew, yes it happens on both pups. It's just curious how it only happens when the push/pull on the tone pot is "pulled" for split coils..

I just looked at the Mccarty current wiring diagram. Not the prior to 2007.
So it looks to have a volume a 3wy switch, and a tone with push pull.
so it appears to ground the white wire coil tap of each pickup when you go to single coil mode.
To rule out the tone pot you could take the 2 white wires loose and ground them to the volume pot momentarily.
This will isolate the tone switch. You also need to unsolder the tone cap, while you do it. That way it eliminates signal bleeding through the tone cap.
If the problem goes away, start putting it back.
First the tone cap.
Then solder one white wire, then the other!
Please try that, and tell us what you find, and hear!
Good Luck

[audiotaxi]

thanks Terry, I'll be back!

[big_teee]

thanks Terry, I'll be back!

Is it Soup Yet!
Or like the boss would ask me in the telephone Bizz, What was it???
Did you fixer up?
Rock Steady,

[Steve Conner]

Don't know about the Singlecut, but I've got a McCarty, and it never did that. The volume knob always worked fine in both humbucker and single coil mode.

I replaced the pickups recently and the wiring in there was as Terry describes it, even though mine is pre-2007.

I'd guess you have a loose ground connection in there.

[audiotaxi]

i still haven't summoned the balls to plug in the soldering iron yet. I think I may have to wimp out and get the local store to do it! The 50 bucks or so might just be worth it in case I screw something up..

[Ronsonic]

Hi all, new to the forum.


Bit of a mystery problem with the new PRS I just acquired.

When the coils are tapped, the volume pot still bleeds sound through the amp, even when fully off. On full humbucker mode, the volume pot works fine

Anyone experienced this or have any clue? I thought it must be the pot, but then surely it wouldn't work properly when tapped or otherwise?

As a general rule, a volume pot that doesn't zero is caused by a poor ground or a faulty pot. You've logically ruled out the faulty pot. Most coil cuts, will bring the coil that isn't used to ground; IOW, the coil removed from circuit is taken out, by bypassing it's connection to the other coil to ground. Look to the switch that does the coil cutting. It is either not closing cleanly or is poorly connected either to the pup or to ground.

The first thing to try is cleaning the switch. The next thing is ensure a clean, solid, low resistance connection to the tap point on the pup and especially the ground on the other side of that switch.

[big_teee]

As a general rule, a volume pot that doesn't zero is caused by a poor ground or a faulty pot. You've logically ruled out the faulty pot. Most coil cuts, will bring the coil that isn't used to ground; IOW, the coil removed from circuit is taken out, by bypassing it's connection to the other coil to ground. Look to the switch that does the coil cutting. It is either not closing cleanly or is poorly connected either to the pup or to ground.

The first thing to try is cleaning the switch. The next thing is ensure a clean, solid, low resistance connection to the tap point on the pup and especially the ground on the other side of that switch.

All that you said and I said, is great info.
However It's a Mute Point if He's not going to fire up the Soldering Iron!
If you were in the area I would be glad to help out.
Should take about 5-15 minutes to isolate what component is what.
I would almost put money on the Push Pull Pot.
The switch is probably not making a good connection and bleeding to ground.
Good Luck,
T