Is there a problem with this diagram?

[misterwhizzy]

Re: Is there a problem with this diagram?

Not a problem so much as an omission. I went recently to look up the diagram for Blackouts in my one volume one tone PRS SE, and I couldn't find one for it. When I select 2 Blackouts, one in the neck, and one in the bridge, the only option is for a single volume knob only.

 

[Jack_TriPpEr]

Re: Is there a problem with this diagram?

Not a problem so much as an omission. I went recently to look up the diagram for Blackouts in my one volume one tone PRS SE, and I couldn't find one for it. When I select 2 Blackouts, one in the neck, and one in the bridge, the only option is for a single volume knob only.

You're probably all-set in this regard, but I am posting this here for anyone else who runs into this in the future. It's how to add a Master Tone control to a Master Volume control.

 

[JorgeB]

Re: Is there a problem with this diagram?



-Seymour duncan 7 string sentient and pegasus pickups
-3 way toggle
-CTS 500k volume
-CTS 500k tone mini pot (fitment issues)
-Schecter 7 string guitar
wired exactly like this diagram.

PROBLEM: Both pots are working as volume and both have to be turned up for either pickup to work. Neither works as a tone pot. I don't understand what I am doing wrong. Please help.

 

[Mincer]

Re: Is there a problem with this diagram?

View attachment 104805

-Seymour duncan 7 string sentient and pegasus pickups
-3 way toggle
-CTS 500k volume
-CTS 500k tone mini pot (fitment issues)
-Schecter 7 string guitar
wired exactly like this diagram.

PROBLEM: Both pots are working as volume and both have to be turned up for either pickup to work. Neither works as a tone pot. I don't understand what I am doing wrong. Please help.

Welcome to the forum!
Can you make your own thread and post pics of your wiring? This thread is for definite issues with a diagram that needs to be corrected. This diagram looks good, so we need to see your wiring...just make your own thread.

 

[JorgeB]

Re: Is there a problem with this diagram?

I will. Thank you very much for the guidance.

 

[Jack_TriPpEr]

Re: Is there a problem with this diagram?

The first attachment is a wiring diagram with an error. The second attachment is a version i created that correxts for that errorm

The URL that hosts the current version of the drawing is here:
https://www.seymourduncan.com/resources/pickup/wiring-diagrams

The push-pull for the Master Series / Parallel switch is missing wire connections in the "up"position of the switch. There a couple ways to wire a Master Series Parallel switch, and the one I have implemented here, provides the benefit of not having to have the 3 way pickup selector switch set to a particular position in order to avoid a cutout in all output when the Master Series Parallel switch is set to "In Series" (which is the Up position of the switch). An alternate approach of adding a jumper wire to the original diagram, (from the top left side of the MSP switch to the top right side of the switch) would work but has the downside that there will be no output from the guitar when the 3 way pickup selector switch is in Position 3.

UPDATE: It was later spotted that additionally the original drawing is also missing a ground wire connection between the tone pot and volume pot. Without that ground wire connection, noise will be present/audible in the output signal. The drawing with corrections for the other errors, also needs to have that missing ground wire added to it.

Version that has the error:


Version with a correction:

 

[Artie]

Re: Is there a problem with this diagram?

PROBLEM: Both pots are working as volume and both have to be turned up for either pickup to work. Neither works as a tone pot. I don't understand what I am doing wrong. Please help.

Just a quickie, since you brought this up: check to see if you acciedently used an 0.x cap instead of a 0.0x cap.

Looks like Jack is on top of this, but I'll double-check the couple that I've been asked about.

 

[Artie]

Re: Is there a problem with this diagram?

The diagram "Jazz Bass with STC-2P or STC-3P" is missing two jumpers on the concentric bass/treble control. (Red jumpers in blue circle.)

 

[Mincer]

Re: Is there a problem with this diagram?

This is a post to thank everyone for contributing.

 

[Artie]

Re: Is there a problem with this diagram?

Hey Dave: Do you know if they're going to bring back the downloadable PDF version of these diagrams? Those were a handy resource.

 

[Mincer]

Re: Is there a problem with this diagram?

Hey Dave: Do you know if they're going to bring back the downloadable PDF version of these diagrams? Those were a handy resource.

I did make them aware of this thread, but that is a great idea. I have no idea why they are jpgs.

 

[Artie]

Re: Is there a problem with this diagram?

They should already have them in their archive. Unless someone hit the "delete" button by mistake.

 

[Artie]

In my post #28, I reference the diagram for "Jazz Bass with STC-2P or STC-3P." But the STC-2P uses a different circuit board, (with different connectors), controls, and subsequently, slightly different wiring. It would be nice if the STC-2P had it's own dedicated diagram.

This is kind of important to me because I'm trying to use that diagram to decide if the 2P or 3P best suits my bass needs.

Update: I found the diagram in my archives, but can't find it on the webpage. If the Duncan folks would like to "right-click" and save this, feel free. (It IS your diagram, after all.

 

[ErikH]

There's a problem with every diagram and I have no idea who decided to make these changes.

1. The little sections that described each position on the switch are gone (1. bridge, 2, middle, 3. neck, etc.). Not everybody knows the outcome of the different wiring options by looking at the diagram. Put back the descriptions.

2. Who in their right mind uses a script font in a paragraph like that? Can anyone read it? Use a font that is readable!

Suggestion: Don't go making the diagrams fancy for fancy's sake. They need to legible and understandable.

And yes, PDF vs. JPG would be preferred.

 

[Artie]

2. Who in their right mind uses a script font in a paragraph like that? Can anyone read it? Use a font that is readable!

Ditto. I can't read them. In the old days, you could "click" the diagram, and it would open in a larger PDF. Very readable. I hope they didn't delete all those PDF's.

(Bring them back.)

 

[Mincer]

PDFs will print better and are better to enlarge. And yes, script fonts should never be used.

 

[JacobSinger]

Hello,

This diagram for 2 Humbuckers, 2 Volume & 3-way toggle.

I assumed this wiring, with the switch in the middle position, would allow me to have a blend of each pickups volume, similar to a Les Paul.
Instead, in the middle position, each volume acts as a master for both pickups.

Is the diagram incorrect, or am I with my assumption?

Thanks for your time
Regards,
Jacob


.

 

[AlexR]

Both.
The middle position does indeed allow for a blend....in fact this is exactly the same wiring diagram as found in a Les Paul (save for the fact they have tone controls too). And just like a Les Paul if you drop the volume of 1 pickup all the way down you shut off the whole sound in the middle position.

 

[JacobSinger]

Thanks very much for your reply, AlexR.
That's cleared that up!

 

[Artie]

I assumed this wiring, with the switch in the middle position, would allow me to have a blend of each pickups volume, similar to a Les Paul.
Instead, in the middle position, each volume acts as a master for both pickups.

No blend. Master volume is correct. Read on in my next post.