Sadowsky Preamp no work

[Rokkolino]

Hello everyone and thank you for accepting me in this Forum. I'll briefly explain the problem I've been having since yesterday on my Fender Jazz with Sadowsky Onboard Bass Preamp electronics. Since yesterday the active/passive push pull potentiometer only works in passive mode but in active mode it no longer gives any signal. Before taking it to the technician I would like to ask you what the causes and solutions could be in your opinion.

 

[FunkHead]

Hello everyone and thank you for accepting me in this Forum. I'll briefly explain the problem I've been having since yesterday on my Fender Jazz with Sadowsky Onboard Bass Preamp electronics. Since yesterday the active/passive push pull potentiometer only works in passive mode but in active mode it no longer gives any signal. Before taking it to the technician I would like to ask you what the causes and solutions could be in your opinion.

Battery?

 

[Rokkolino]

It was the first test I did replacing a new battery. But nothing

 

[FunkHead]

It was the first test I did replacing a new battery. But nothing

Do you own a multimeter? You can check if the push/pull is functioning by testing continuity between the terminals in both positions.

 

[Rokkolino]

Unfortunately I don't and I will take it to a technician in the next few days. I wanted more than anything to understand what problems there might be and whether the cost of the repair won't be that much.

 

[FunkHead]

Unfortunately I don't and I will take it to a technician in the next few days. I wanted more than anything to understand what problems there might be and whether the cost of the repair won't be that much.

It could be a broken wire, bad potentiometer(rare), preamp died. Even the leads for the battery should be checked.

 

[Rokkolino]

Yes, definitely... let's hope for the best

 

[Lava]

Post this on the Club Sadowsky!!! thread. Roger Sadowsky will most likely be able to help

 

[Zooberwerx]

Hello everyone and thank you for accepting me in this Forum. I'll briefly explain the problem I've been having since yesterday on my Fender Jazz with Sadowsky Onboard Bass Preamp electronics. Since yesterday the active/passive push pull potentiometer only works in passive mode but in active mode it no longer gives any signal. Before taking it to the technician I would like to ask you what the causes and solutions could be in your opinion.

Is this a battery box / compartment with a clip or copper "tabs"? Let's rule-out continuity issues before we start pursuing the more expensive avenues.

Riis

 

[Rokkolino]

that's right, a flush mounted battery box was made with copper tabs

 

[Zooberwerx]

that's right, a flush mounted battery box was made with copper tabs

Sometimes, with time / use / wear, the tabs will flatten out and compromise full-contact with the 9v poles. If indeed the case, the tabs can be re-bent upward.


Riis

 

[murphy]

have a look to make sure no little wire has come loose

 

[Rokkolino]

I will check the battery wires and they are both connected and soldered. I tried lifting the tabs a little and nothing, the active mode doesn't work.

 

[BobKos]

The jack is what applies power from the battery to the preamp. If you look closely, one of the wires from the battery runs straight to the preamp. The other battery wire detours through the jack. If cord is plugged in, the circuit is completed. If the cord is removed, the circuit is opened and power to the preamp is turned off. This is a battery saving function utilized by almost all preamps. This should be thoroughly checked. In a pinch you can connect the switch circuit wires together and see if the preamp functions. That will tell you for sure that the problem is in the jack / switch.

 

[_One//Man//Mutiny_]

I would definitely check everything in evolving power first before going anything else
Even the knob on the pot. I’ve had it happen to me before where the knob was oversized for the shaft and I put it in my gig bag and it pressed the knob far even in that it wasn’t fully disengaging from the pulled out position. If it was working yesterday and it’s not today, could be something stupid like that.

 

[Topkat13]

Local repair options? Don’t be hesitant to call their shop in NJ…a human being will answer the phone.

 

[bass12]

I too would suggest posting your question in the Club Sadowsky thread. Here is a link: Club Sadowsky!!! | Page 3186 | TalkBass.com