I bought a new Sqiuer VM Jazzmaster, and found buzzing and crackling after using the tremolo.
I sent it back to the shop.
I received the guitar back yesterday, but the fault was not fixed.
I checked the bridge to jack ground with a multi-meter and it was open circuit.
I made a diagnostic fix by connecting a wire from the jack nut to one of the tremolo screws. (see attached)
The static noise has gone completely.
I found a diagram on the web showing a ground wire to the bridge posts.(attached)
However, I am sure the ground wire is connected to the bridge post (top E), but the floating bridge loses ground when you use the tremolo.
If you push the bridge forward or back the ground is good but the bridge shifts as you use the tremolo.
The guitar was set up as you would a Strat (no floating bridge), the bridge was lowered right down by the 2 adjusters at the sides. Then the string heights were set by each string adjuster.
The bridge height adjuster on the earth side (top E) was not making good contact with ground.
There are 2 screws which adjust bridge height, in the holes on each end of the bridge.
They are adjusted with the tiny alan key.
I raised the bridge by about 4mm. then lowered each string adjuster.
The bridge now rocks smoothly as the tremolo is used, and the strings now stay grounded.
Well waddaya know - that seems to have done the trick!
I cut a pick in two and primed it with some glue - just household stuff (UHU over here). I took the neck off and placed the two halves in position, I repeatedly removed and replaced the picks to allow the glue to spread and also to let it mix with some air. I didn't wait very long at all before screwing it all back together.
I noticed immediately that the bottom of the neck aligned perfectly with the cutaway of the body - it's clear that they milled too much of the top of the pocket away.
Anyway, it's been fine since, only going out of tune if it takes a knock - which is perfectly acceptable.
Thanks for your feedback!
Well, you'd better hope it's very stable.
The neck shift issue is actually pretty common with 90's Jag-Stangs, mine even has it. I have mine shimmed with a Fender-heavy pick.
The first part of the issue was a design flaw I've seen with 1st run Jag-Stangs where they cut the neck-slot a little off center, you can tell because the D and G strings don't follow the outside of the position markers on the fretboard in a straight line. Mine had this issue. That's part of why I shimmed the neck.
The other part of the issue is Pre-Dyna Gakki Jag-Stangs (Pre-1998, maybe even post 90 until the 2nd run so maybe some Dyna Gakki instruments, CIJ to be precise, are also affected). The problem with basswood as a body wood is it is very soft and the Jag-Stang's neck joint is a bit light on the bass side for the neck to rest against.
I just kept shimming my neck until I got it perfectly straight and it stopped, the wood just compressed till it would not compress anymore and it's been that way since the mid 2000's. Been a rock solid guitar despite that the whole time.
I ordered a Jag-Stang from Japan, I have had problems with the neck since I got it in the 90s. Since the neck doesn't fit the neck pocket perfectly, it rotates up and down very easily. This is the main reason I don't use it more often.
I have taken my guitar to a respected guitar technician to solve the problem numerous times, unfortunately to no avail. We tried extra screws, we tried padding the neck pocket with a snug guide - these only seemed to work until the next time the guitar took a knock - which is unavoidable.
The last thing we discussed was to set the neck (glue it in place), but we were both against this idea at the time since the irreversible nature of the procedure. I am now reconsidering this approach. As far as I can tell, I would need to cutting a groove to access the truss-rod, but is there anything else I should consider before attempting this myself?
I mean, it's just glue right?