Tokai Jazz Sound with P/J pickup - can`t figure out the poti controls (or date it). Can anyone help?

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Popo
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Tokai Jazz Sound with P/J pickup - can`t figure out the poti controls (or date it). Can anyone help?

Post by Popo » Wed Sep 11, 2019 10:36 pm

Hi Tokai Forum members,

i recently joined the club and managed to pick up a Red Tokai Jazz Sound. I only had a few minutes in this one second hand shop I was passing through on my travels, but the price was very fair and it plays so nice, I just went for it. The shop didn`t really know anything and couldn`t answer any questions. I thought I would figure it out at home..

So firstly, don`t get the poti controls. I thought it would be a simple Vol, Vol, Tone setup, but that definitely doesnt seem to be it. If I turn down the first or the last poti completely, there is no sound at all coming out. The middle one may well be tone, it makes the most difference, but I am also starting to think it might be a balance between the P and J pickups, but somehow reversed in direction.

Anyone know what the standard poti configuration on this kind of Tokai P/J bass would be? I opened the poti cavity up and the wiring seems all original and unaltered. One white cable came off as I did it, so I soldered it back into its place on the middle poti, hoping that might make it work in a way I would understand, but alas, nothing has changed. I am actually really happy with the sound, I just wish I could understand what I am doing when turning the potis...

Oh and since I can`t get into the Tokai Registry website for some reason (it will not load when I access it), I was hoping someone could help me figure out the age of this bass from its serial number (L19076). Thanks in advance to anyone taking the time to help!!


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mdvineng
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Re: Tokai Jazz Sound with P/J pickup - can`t figure out the poti controls (or date it). Can anyone help?

Post by mdvineng » Thu Sep 12, 2019 5:36 am

The one nearest the jack is Master tone.
Middle is Jazz bass pick up volume
The next is the P bass pick up volume

A bit like this https://images.app.goo.gl/VyQagQVBc1pw9McZ6
Tokai VSB80 OF, Michael Kelly Patriot custom, Epiphone Elite SG & EB3. 8)

Popo
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Re: Tokai Jazz Sound with P/J pickup - can`t figure out the poti controls (or date it). Can anyone help?

Post by Popo » Thu Sep 12, 2019 5:57 am

Thanks for the reply, especially the diagram. I will compare the wiring more closely when I get some time in the next few days, because it really doesn`t seem to be a Vol, Vol, Tone setup right now. I think the first two are Volume for P and J Pickups respectively, though there is something a bit odd about how they affect each other when fiddled with, but the knob closest to the Jack acts very much like a volume knob too, almost muting the bass when fully turned down and really making it loud when fully open :-? .

I never had a P and J combination bass before, I am assuming the pickups affect each other when their volumes are fiddled with, but the tone thing is really strange, it seems to mostly be a difference in loudness, not really tone at all. Any idea what could be wrong? Is the cap maybe broken? Is my wiring maybe wrong or faulty?

mdvineng
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Re: Tokai Jazz Sound with P/J pickup - can`t figure out the poti controls (or date it). Can anyone help?

Post by mdvineng » Thu Sep 12, 2019 9:37 am

Could be a faulty pot (shorted)
Try p pot full on j pot full off and vary the tone
Try reverse of the above
Try both p and j at 50% and vary tone
See what happens
Disconnect cap and see what happens
Guitar is probably mid 80's ,will try and look at the registry later.
Tokai VSB80 OF, Michael Kelly Patriot custom, Epiphone Elite SG & EB3. 8)

Popo
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Re: Tokai Jazz Sound with P/J pickup - can`t figure out the poti controls (or date it). Can anyone help?

Post by Popo » Fri Sep 13, 2019 2:00 am

Thanks a lot for your help. Would really appreciate you looking up the serial number for me too!

I am working intensely for the next few days so really can`t do much bass tinkering but will look into it and post updates as soon as I have some free time. Really hope its not a faulty pot or even worse (my google research on the topic of tone pots acting like volumes mentioned possibility of broken pickup wiring :o , which would be a nightmare, really hope its not that) and is just the slightly crappy soldering job i did on the cable that was off or acme off when i opened the guitar up.

Popo
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Joined: Wed Sep 11, 2019 10:12 pm

Re: Tokai Jazz Sound with P/J pickup - can`t figure out the poti controls (or date it). Can anyone help?

Post by Popo » Fri Sep 13, 2019 2:08 am

Try p pot full on j pot full off and vary the tone
Try reverse of the above
Try both p and j at 50% and vary tone
See what happens
oh yeah, tried this for a couple of minutes and the tone pot basically does the same thing in all three variations. Pickups seem loud and clear until I turn the tone pot, why just progressively mutes everything in all three volume settings.. Is this giving you any indication of what it might be?

mdvineng
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Re: Tokai Jazz Sound with P/J pickup - can`t figure out the poti controls (or date it). Can anyone help?

Post by mdvineng » Fri Sep 13, 2019 2:41 am

Use potentiometer cleaner on all 3 pots first
Change the cap 2nd
Change the pot 3rd
Schematic https://guitarelectronics.com/jazz-bass ... g-diagram/
Tokai VSB80 OF, Michael Kelly Patriot custom, Epiphone Elite SG & EB3. 8)

Popo
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Re: Tokai Jazz Sound with P/J pickup - can`t figure out the poti controls (or date it). Can anyone help?

Post by Popo » Fri Sep 13, 2019 6:57 am

Have managed to get into the Tokai Registry now but still struggling to identify this bass. Looks like a TJB 55G, but its hard to tell. I keep seeing very similar ones on google but they all have gold hardware. Also those metal knobs on my pots rather than the plastic one. Can anyone tell me when the headstock shape changed away from the Fender original one? Is that a definite indicator of the rough age? Did they still make those proper Fender copy headstocks in the mid 80s or only in the beginning?

mdvineng
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Posts: 182
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Location: manchester

Re: Tokai Jazz Sound with P/J pickup - can`t figure out the poti controls (or date it). Can anyone help?

Post by mdvineng » Fri Sep 13, 2019 8:45 am

The headstock change was primarily for the USA market, evetyone else got the Fender shape. Yours looks like an 84.
Tokai VSB80 OF, Michael Kelly Patriot custom, Epiphone Elite SG & EB3. 8)

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