JP 6/7 Input Jack Help needed

[lifeson1]

As an avid JP user for going on. . . however long he has been with EBMM. I had an original JP6 sans Piezo, and every other version I've had has either been BFR/Anniv, and my main guitar is the Majesty.

I just nabbed a new JP7, and I"m having issues with the mono jack. Whenever I'm plugged into it, on the gain channel of my amp, I'm getting all these intermittent blips and beeps when I have either the magnetic pups, piezo, or mix selected. Almost like I have me cell phone near the amp or something (I don't). When I plug into the STEREO jack, it's gone. I Ab/B'd it with my Majesty, and there is NO issue at all.

And no, there are no computers or anything that would offer interference at all going on. I tried it with all three of my amps, as well as the Maj (and a few other bucker guitars), and that's the only one where it's occurring,

I"ll probably have to contact CS, but thought I'd turn to my peers here at first to see if there was something I was overlooking. Thanks, guys!

 

[beej]

Weird. Battery fresh?

 

[lifeson1]

Weird. Battery fresh?

That’s a good point... I didn’t know , I put in a fresh one- and it still gave me the same trouble.

Thanks for that idea, though.

 

[johnnyboogie]

JP7 as in the original model, no gain boost right?

 

[lifeson1]

JP7 as in the original model, no gain boost right?

Correct. Firemist gold

 

[johnnyboogie]

Report the issue to customer support, they should know better.

 

[beej]

Hmmm ... it's basically just a buffer on the mono output (fed by both pickup sources). I would open it up and check that all of the wires are correctly soldered to the board, and you don't have any intermittent connections (hot, ground, battery).

Totally guessing, but the other thing it could potentially be is a bad connection from the battery. Sometimes the 9V doesn't make great contact with the copper strips. I used to get noise like this from the Silent Circuit when that would happen. In which case, I'd either pry the connectors up slightly (with a jeweler's screwdriver), or use a small piece of cardboard between the battery and the lid, to force the battery in more tightly.

But of course, the CS guys are the best resource, so shoot them a note if none of this is useful.

 

[lifeson1]

Great advice, I'll give it a shot! I"ll report back when I have time to dissect a bit.

 

[beej]

Good luck!

 

[Daniel]

Hi there, shoot us an email at [email protected] with your guitars serial number and we'll help you out.

 

[lifeson1]

Hi there, shoot us an email at [email protected] with your guitars serial number and we'll help you out.

Thanks! Already on the way back to CA for a diagnosis. Looking fwd to getting it back in hand!