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Post subject: quick Am Deluxe J question
Posted: Mon Jan 16, 2012 10:39 am
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does anyone know... when you switch to passive on the Am Deluxe is it just switching the tone circuit or is it actually taking the batteries out of circuit?

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Post subject: Re: quick Am Deluxe J question
Posted: Mon Jan 16, 2012 5:53 pm
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kgerry wrote:
does anyone know... when you switch to passive on the Am Deluxe is it just switching the tone circuit or is it actually taking the batteries out of circuit?



The resource for you to determine that is right here in this Forum "Support" tab at the top of the screen. Use the link below and find your particular bass in the menu. The service data and wiring diagrams are in PDF format.


CLICK >>> http://www.fender.com/support/articles/bass-guitar-service-diagrams



"P-L"


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Post subject: Re: quick Am Deluxe J question
Posted: Mon Jan 16, 2012 6:04 pm
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There is no wiring diagram for the post-2010 US Deluxes yet !


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Post subject: Re: quick Am Deluxe J question
Posted: Mon Jan 16, 2012 6:09 pm
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kgerry wrote:
does anyone know... when you switch to passive on the Am Deluxe is it just switching the tone circuit or is it actually taking the batteries out of circuit?


In active mode all active tone controls are working. In passive mode only the volume and passive tone controls function.

In a few words yes the active/passive toggle selector changes the tone circuit and disables the active tone controls, taking the batteries out of circuit.


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Post subject: Re: quick Am Deluxe J question
Posted: Tue Jan 17, 2012 8:01 am
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thanks bro.... one of the things i hated on my active deluxe P was the batteries draining off at the most inopertune times... making my rig sound all garbled like blown speakers...
i almost didnt buy another active for that reason, but do like being able to switch from Passive to Active on the fly... and knowing if it starts to sound "questionable" mid-set i can just switch to passive and keep going....actually for what we play i will be in passive mode about 75% of the time anyway....

and P-Luke... yes i know there are resources out there, but that sort of negates the use or function of a forum, doesnt it?

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Post subject: Re: quick Am Deluxe J question
Posted: Tue Jan 17, 2012 1:53 pm
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>kgerry, I looked at the 2005 MIA Jazz Deluxe diagram and compare it to my 2010 circuit.
The different between 05 and 10 mainly is the active/passive switch. this switch on 10 allow the active circuit out of the signal path. when 10 on passive mode, it has everything a passive jazz has (volume, Pickup Switch, tone), and it sings without battery(s).

About your P:
Normally, an active bass is "active" when plug-in. If your P active drain battery too fast, consider unplug your bass after each section, and new battery(s) each gig.

Still doesn't work? open it up and check if the battery ground is wired up with the signal ground, if that happens that means your baby is "on" all the time. Rewiring the battery ground should fix the problem.
If it runs 2x 9V battery at 18V(series), you can modify it to 2x 9V at 9V(parallel)to lengthen the time, less head room in exchange.
Or if you hate dying active so bad, modify it to passive? (don't try this if it has active pickups)
Modify it yourself if and only if you feel comfortable with electronics and soldering iron, if not, pay someone to do it for you and let'em take the blame. :D


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Post subject: Re: quick Am Deluxe J question
Posted: Wed Jan 18, 2012 1:05 pm
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yes i realize on the P it starts drawing battery juice as soon as the 1/4" is plugged in....

and yes, i should put in new batteries before every gig....

having said that, i am a huge Scrooge McDuck and try to get a couple gigs out of a battery, as it seems a waste to me to toss what might be a 80% good battery....

also, while active tone has it's place... many songs we do sound better with a mellow, fat passive sound.... which is what sold me on this J model... and the low impedence difference means i dont have to run to my head and switch the pad from active to passive either....

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Post subject: Re: quick Am Deluxe J question
Posted: Wed Jan 18, 2012 3:53 pm
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I got my 10MIA JDv for the same reasons :D.
Toss a 80% good battery is not a waste but a crime.

I forget the source, but some guy said he had a battery life problem on his bass, and he solved it by rewiring the output jack(I read his article while i was trying to solve the noise problem on my bass). If its not the output jack problem, then it might be the "marginal gig voltage" problem. There are a lot of topics of these kind we haven't explore yet, but hopefully someone would have data on them.

Anyway, good luck


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Post subject: Re: quick Am Deluxe J question
Posted: Thu Jan 19, 2012 4:18 am
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I kinda looked in to the 10 MIA JD active/switch again today,
I realize it acts like a bypass switch it.

It is a on/on DTDP switch,
1 side came from pickup switch to either preamp in or Volume upper in;
the other side goes to output jack from preamp out or Volume upper middle(tone cap goes here),

to picture this ;
|preamp In |panpot | VolIn |
|preamp Out|outputJack| passiveOut(tone cap)|

There is no way to know if the preamp is drawing juice or not when we are using passive mode. Unless someone is gonna test the circuit....(And i don't think i am gonna do it, at least for now :D )

But let say the preamp draws power even if you are on passive, change to a 3PDT switch should do the job. Basically it add a extra roll like
|preamp 9/18v +| battery + | (nothing)|(on/off config)
This cut the preamp's power when you are in passive mode.
Problem with 3PDT is they are a little bit bigger then DPDT and might not fit in.

As an addition, if rewire the tone cap to panpot out instead of passive out, we will have a tone pot working on active and passive mode. don't know how its gonna affect the tone though.


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Post subject: Re: quick Am Deluxe J question
Posted: Thu Jan 19, 2012 2:11 pm
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There is possibly a problem with the jack on any active that has a bat that only lasts a couple of gigs. Even the early ones would do at least 30 hours. Now more like 100 to 300. Battery life on a modern active bass should be way longer than a couple of gigs anyway for sure. If the third contact in the jack malfunctions on an active bass then the preamp just stays on ALL the time constantly draining the battery. Some people advocate a kill switch but I'm anti hole drilling. A new jack might be in order. To be sure you will need a multi-meter and check the voltage to the preamp both with the plug inserted and then with it removed. Pretty simple to check if you have a multi-meter or have a friend that has one. You can buy one at Radio Shack pretty cheap, they are not exactly top quality but get the job done.


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