Handy Trax Power Problem Battery Works P/S Won't

[stingray]

Hey guys! Been a minute since I posted here but thought this would be the best place.

 

I recently bought my 3rd HandyTrax, this one a USB version and it seems that the power supplies that I am using for my other 2 won't work for this new one. They are simple 12vDC wall adapters.

 

I was diagnosing the new turntable and noticed that direct power using this adapter to the motor turned the motor, then I connected directly onto where the batteries would connect and it worked.

 

I am getting 12v dc on the other side of the jack so I know it's not a bad jack.

 

 

1. Am I just using the wrong adapter? It does say 12v AC on ALL 3 of my handytrax' but my DC adapters work on the other 2. Can anyone confirm they official Handy Trax power supplies are AC?

 

2. I know it's a super simple circuit, all the traces look good, all solder joints look fine, no burnt components etc. Is there something obvious that I could try and replace like a resistor/cap/diode?

 

3. Even more confusing, some pictures of HandyTrax power supplies on google show that they are Ring Positive / Tip Negative. I will test this in a little bit by switching polarity. Edit: Tested polarity, nothing. Now almost certain it needs an AC p/s. I find it odd that the older models will work with a DC power supply but the new one doesn't.

 

 

I tested with my 07 AC power supply, still same results. So now my guess again is a bad component on that board. Power switch works etc. Any known problems with that transistor?

 

Thanks in advance for your help.

Edited January 26, 2019 by stingray

[Jam Burglar]

Sounds like you're on the path. Even if nobody here has an answer for you post up your solution when you find it. It might help somebody out in the future. If you have batteries in the unit, does the PS automatically stop taking current?