Leaving that cable diagram saved you a headache Kerry, good fix, thanks!

Nice repair and now you have a high quality power suppy, please clean up the front and make it look nice again....

Glad it was an easy fix Kerry. Two things, first although we all love our better halves I'd take off the wedding ring when poking around a circuit that can deliver high voltage/current and second for the long term health of that supply I'd change out the resistor that "smoked" since it probably was severely heat stressed. Now that the nit-picking is over, good job, always enjoy following along with your adventures! ;-)

Nice repair and now you have good power supply with current limitation.

Good video Kerry! I was a technician for 20 years and used to keep a log of any tough problems I found. You'd think once you go through fixing a tough dog, you would not forget the solution. So wrong! Just subscribed to your channel. BTW it seems like a great supply. I'm searching for a small linear supply that will output 0-20 volts at 450 ma. It has to be quiet a possible to be used for RF. Cheers, John

I have a pair of LP-532 FM's. So far one checks out. I will have to take a look at the other. These have analog meters, and 60v. The wiring may be messy, but this one lasted quite a long time. I may recap mine. I likely will shoot a video of it.

Nice repair video, another piece of kit saved from going to the dumpster.

Cool. Congrats. I picked one up not working also. Luckily mine was an easy fix. The display was dead on mine also. Turned out the power supply driving the display had bad filter caps. You might want to change out some of those silver caps with the red tips on them on yours. A couple looked like they were bulging.

Nice video. Glad it was an easy fix. I am a big fan of Lambda products. I have a few of their older supplies, and some new switch mode (non-lab) supplies. All are rock solid. Keep an eye on those old capacitors on the control board. I have had to replace them in my supplies. They go high ESR and the units cannot put out their rated current. Does yours have a nasty overshoot, or is it a meter issue when the display jumps up to over 60V when you first switch it on late in the video (a meter with min/max or a scope will tell you of course). Thanks again.

Hey man, I have one of these that is like new in the garage, have no idee what it was, googling it to find out what it was and found ur video... gosh what u didn't mention was how damn heavy they are!!!!!!!!!!!!!!!!!!!!!!!! Mine is a LQ-532... if you or anyone is interested in it I can toss it on my ebay sales account just let me know!

Just snagged a 531 with the same condition on the output.. peaked inside, oh dang... banks of transistors. Looks like I'm gonna have fun!

Good afternoon, master Please see the schematic diagram of this power supply! Thank you, sir !!!

Wow , those to 3 packs , I thought they only came only as 317regs or transistors

Dang, take the ring off your finger when working on stuff like this, if not for the safety practice but to ensure you never risk making a very short someplace that damages more parts and makes for more work .... (speaking from personal experience).... :-)

I have the similar 531 which is in like new condition, except the transformer buzzes -- can anyone help me fix it? Thanks

I have a lambda lt-802 and the screen just flashes. I can't adjust voltage or current. Any ideas ?

Please !!!

how much did you pay?

Hi. One of my Lambda's works decent, but could use some new capacitors. The other one is in pretty rough shape. I may not repair it...yet. kzfaq.info/get/bejne/e8h4qZNqz53LiJc.html