Charger problems 48v Drive

[Volt_Ampere]

The caps are replaceable if you are handy with a soldering iron. You need to make sure that you get caps that are equivalent to the ones in there. Digikey has them. I wish I had a schematic for this charger - I have repaired one by replacing the caps. Look for other evidence of damage when you have it apart. IT's worth taking a shot at fixing it. They are expensive to replace and I do not think anyone repairs them for a living.

[aaronmx327]

Thank you guys for all your help i took the charger apart and the caps arent physically blown or busted they are a little puffy feeling on the tops though, does that mean they are blown?

[Volt_Ampere]

Puffed up on the tops is not good. Hard to tell if they are blown without removing them and measuring the capacitance at voltage.

[jakeace]

Originally Posted by cgtech

Yeah, but also look carefully at the mosfets on the heatsink inside (they are in these Grey rubber boots), look at the bottom of the boots & board below for smoke trails.

Anyone have pics or a video on what commonly needs to be replaced?

[robertakamagoo]

I think the same thing happen to my charger. There's a Yamaha dealer near by many he can rebuild it. If not what's a good charger to buy

[Raystar57]

Originally Posted by Volt_Ampere

Puffed up on the tops is not good. Hard to tell if they are blown without removing them and measuring the capacitance at voltage.

These are no good!
https://www.youtube.com/watch?v=cTKEZX-anog

For the big boys! (dude has blown too many caps!)
https://www.youtube.com/watch?v=TBpsOsq5isE

I don't thinks this helps the OP situation but I had to post.

I have replaced many puffed ones on boards and it solves the problem.