Ernie Ball Music Man JP6 Restoration Project!

[jamminjim]

Bkrumme I previously stated this "What I don't see in the diagram is the wiring for the piezo switch, or the piezo pickup and that he needs the JP6 Piezo schematic, to address the extra wiring in his control cavity.

So the yellow, orange and black are the wires coming into the piezo pot from the piezo element. Then the wiring bundle with the black heat shrink is the wiring from the piezo switch. And it could be wired up from mbmans pics then, maybe. Are there two different guitars in mbmans pics? Or did he move the wiring a bit in a couple of the pics?
I'm guessing the latter. Anyway, it looks like the red wire from the piezo swith goes to the center tab on the piezo pot, the clear wire appears to be soldered on the back of the volume pot. Also looks like there are two black wires. One goes to the push-pull switch and one goes to the central ground.

A JP6 piezo schematic will confirm where all the wires go.

 

[bkrumme]

Bkrumme I previously stated this "What I don't see in the diagram is the wiring for the piezo switch, or the piezo pickup and that he needs the JP6 Piezo schematic, to address the extra wiring in his control cavity.

So the yellow, orange and black are the wires coming into the piezo pot from the piezo element. Then the wiring bundle with the black heat shrink is the wiring from the piezo switch. And it could be wired up from mbmans pics then, maybe. Are there two different guitars in mbmans pics? Or did he move the wiring a bit in a couple of the pics?
I'm guessing the latter. Anyway, it looks like the red wire from the piezo swith goes to the center tab on the piezo pot, the clear wire appears to be soldered on the back of the volume pot. Also looks like there are two black wires. One goes to the push-pull switch and one goes to the central ground.

A JP6 piezo schematic will confirm where all the wires go.

I didn't recall you saying that, but now that I read back a bit I see that. Yes, definitely need a JP6 BFR Piezo diagram.

 

[jamminjim]

Right. A BFR JP6 piezo schematic. The one with the push-pull switch. Thanks for correcting me.

 

[Spudmurphy]

To take a picture from underneath is a bit difficult as it would mean dismantling all the "gubbins".
I'm sure that it will all become clear when the right diagram is sourced.

I've tried Ernie ball.com but all you can download is a schematic of the switching options.

 

[Morbid]

and you thought the "wood part" was the most complicated

All EBMM electronics is high class wiring

Haha, no joke sir!

Morbid - Go back to spuds control cavity pics and you'll see he pointed out the central grounding point in the control cavity...

The majority of all that I get now. I'm not worried about the wiring for the piezo system, as that's fairly self explanatory since the guy who disassembled the guitar cut the wires in have instead of desoldering them.
What I'm confused about, is even the wiring that I thought was clear cut in the diagram (from volume to tone pot and from pickups to selector switch)is totally different in Boogieman's guitar.
Here is how I wired my selector switch, just like the Diagram SEEMED to tell me...

If you look, the 3 wires for each pickup that I wired (as per the Diagram)match up with the letters on the board. S for shield, G for Green, W for White and so on. Unless I'm missing something, aside from the mystery bare wire, that's all that the diagram wants me to solder to the board. But in Boogieman's pictures, he's got a Red wire leading from the board to the push pull tone pot, and a black wiring going to somewhere else.

Now as was mentioned, my diagram does not include the piezo system, you're right. However, I DO have a diagram on paper that does, and the Piezo system does not (on that diagram)and should not interfere or change the way the rest of the electronics are attached simply because it's a system all on it's own.

But like you said, the only way I'm going to get this sorted is to call Ernie Ball. I'll have to call them Monday as I have to leave for work now and won't be back until late, and tomorrow is Sunday.

I also don't have a wire going to the switch washer.

Another confirmation means all the more reason I must call Ernie Ball! lol

To take a picture from underneath is a bit difficult as it would mean dismantling all the "gubbins".
I'm sure that it will all become clear when the right diagram is sourced.

I've tried Ernie ball.com but all you can download is a schematic of the switching options.

Don't want anybody dismantling their babies Spud! No need actually, as there are now 3 confirmations of no odd wire.
I checked the website also, and also had no luck. As I said, I'll call EB Monday afternoon.

I appreciate the time and effort fellas! Thanks a lot.

 

[jamminjim]

Ok Morbid, I received the schematic for the JP6 BFR Piezo and it should answer all your questions. It does show the bare wire going to from the switch board to the ring as the posted schematic does. Apparently EBMM is leaving off the bare ground wire that goes to the switch ring. So my guess is the switch is getting grounded some other way. Or there is no need to ground it. This is the question to be answered by EBMM CS IMO.

Of the three wires coming into the control cavity with the black heat shrink (upper switch) the white (or clear) gets soldered to the back of the volume pot. the black wire goes to the center tab on the volume pot and the red wire goes to the center tab on the piezo pot. All grounding black wires are as previously described.

The green and red wires of the bridge hummer go to one side contact of the push-pull switch, and the black and white wires from the neck hummer go to the other corresponding side contact of the push-pull switch.

You also need the black and white wires going from your switch board to the volume pot.


Can send the schematic if you forward your email addy.

~Jim

 

[Morbid]

I was looking up the number for Ernie Ball and getting ready to call, then decided to check the thread to see if there were any new posts.
Glad I did

Sounds like the diagram still doesn't match the actual wiring we've seen above, but I'll give it a shot. You have my email address in your inbox. Thanks for grabbing the diagram, it's appreciated. I'll let ya guys know what I come up with.

 

[Morbid]

Now we're talkin. Got the Diagram from Jim earlier this evening. This one looks right

I'll be getting back to work on the guitar as soon as I can.
You're the man Jim! Thanks again

 

[e.mate]

You're the man Jim!

+1

 

[jamminjim]

Aww shucks... it was nothing. Glad to help out and looking forward to seeing this great little JP6 come together ;-)

 

[ScoobySteve]

This thread and F5 are my friends.

 

[the24thfret]

This thread and F5 are my friends.

Get a Mac.

 

[bkrumme]

Get a Mac.

That makes no sense F5 is much easier than Command+R

 

[the24thfret]

That makes no sense F5 is much easier than Command+R

Ha, good point.

Still, though...

 

[Morbid]

So I'm messing with the wiring a bit now. Just got off work. I was wondering if I could trouble someone to take a picture of the tremolo cavity of their petrucci for me. I'm having difficulties figuring out what route the grounding wiring goes. Ya know, the one that screws into the electronics cavity, but is also soldered to the tremolo claw and is the ground that connects to the shielding as well. Unless there WAS a hole that is covered by paint somewhere...even still, I would benefit from knowing where it might be

 

[Morbid]

Nevermind. Found a pic of Spud's tremolo cavity in his stripping thread. Guess it takes the route I thought...interesting. I'll have to experiment.

 

[Morbid]

Done about all I can tonight. Got the piezo system back and wired up almost all the way (still gotta wire the switch). Got the volume and tone pots mostly wired as well. Had to pull out the switch and unwire it, so I'll have to redo that tomorrow after I call Ernie Ball and find out where I'm supposed to connect that bare wire to.

I'd show the wiring job, but truth be told, I'm a little embarrassed. I had to use different gauge wire that I pulled from a couple of spare pickups. It shouldn't make an audible difference, but it definitely doesn't look as nice as factory. Fortunately, it'll all be hidden. Nevertheless, point is, it's ugly and I don't wanna show it

Hoping to be done tomorrow...

 

[threeminutesboy]

good job, you're getting near the end

 

[Coffeemug]

It's gonna turn out awesome...!

 

[Kaloyan]

So is the new tone going to be