Recent content by RonK

Update: I bought a VR from kloppk. Installation was easy. The multiple variants thing did crop up but after exchanging a few emails (he responds very quickly) the problem was solved and the generator is working. I removed the external large fuse because it is redundant with the fuses on his...

I definitely appreciate all of the help. There are at least 2 diodes and one of the TO-220 FETs damaged in this one. Strangely one leg of the FET was broken. I haven't disassembled it far enough figure out if it burned out of the body of the FET or if perhaps it was a failure due to long time...

I agree. No burnt traces so the board is good but absent a schematic it is just more efficient to replace it. Maybe I will repair it as a spare.

He sent me a PM with his email address. Thanks!

Thanks. Will do!

I was doing the VR tests in the PDF that LuckeyD posted above and things were not looking swell. I decided on a hunch to just pull out the VR so I dug into my junk, found some wire number labels and took it out. I removed the board and this is what I found: My 40ish years of experience in...

I need to go over and do more of the tests you suggested later

The fuse is good and the pot / VR measure 13.5K CW 3K CCW

I tend to separate fun engineering projects where I prove that I am smart from making things work so that someone else can maintain whatever I have done. I design broadcast equipment. Many of the products I design are purchased to replace bailing wire and duct tape "designs" done by someone...

I have noticed that there is an "aftermarket" VR which has its own voltage pot and does not use T1 available. Has anyone ever used one just in case either the VR or T1 is the problem?

Thanks for the schematics. Reading the one on the side door is tough when you have your head in the control panel up top! This one worked until a few weeks ago and then one day it showed low voltage when it was started.

Per the suggestion to check the transformer, I visually inspected T1. There is no sign of overheating such as discoloration or melted plastic tape over the windings. Without a schematic and winding resistances that seems to be the extent of what I can do. Making that assumption I did the tests...

Thanks. That is my concern - I would like to avoid potentially expensive mistakes. I wonder if the resistance of the voltage pot might be the clue. 3K CCW and 13.5K CW does substantially agree with one of the options in the manual.

Which of the two VR test options on the manual should I use? The P/N on the regulator is none one of the two in the manual. (P/N 01- 21501-1 & P/N 01- 21501-2)

Fuse is good.