I have a 732B that instantly blows fuses when power is attached . I drilled apart the transformer assembly to examine the inside, replaced the power-entry module, affixed metal behind the rivet holes, tapped them, and screwed it back together. I measured the output, which is 22VAC, which is correct.
If I have the transformer disconnected from the power supply board, it doesn't blow the line fuse. If it is connected, it blows the fuse. I looked in some older 732B manuals, which had troubleshooting steps and schematics, but I don't reaally understand how the crowbar works.
Fluke doesn't call it that, but thst's what it is. In an overvoltage condition, some component conducts, and shorts the transformer secondary, which blows the fuse. I could use some explanation of how to troubleshoot that part of the board. Newer manuals do not have most of the maintenance and repair info.
In the 732C manual it just says a few test points to check, and if one is off, replace the board. Fluke no longer stocks the part I need. I have to repair the board. It only stands to reasom that Fluke wants to sell its new product, the 732C, and obsoleti g the 732B is a good way to do that.
I don't fault Fluke for it's business model, even though it sucks. No one has offered Fluke any reason to change. It's the old, "We don't have to care. You don't have any other choice." And Fluke makes some nice stuff. I just wish someone would give them competition!