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Gene Good testing so far ;) w the Fuses out, still have voltage going to the board. just a quick look, Definably would use a Light bulb limiter. w be nice to uses different light bulbs and bring it up slowly to reform the capacitors. I would also look at the AC wires going to the Temp-sw they...

is this the one you were just working on?

I also looked at that one but they were out of stock and still are. I think it has its own built in sound card, I picked this one cause it looks like the company is here to stay and have support (time will tell) I don't have anything to compare it to. it has good reviews and people have compared...

I just hooked my Analog Discovery 2 w software to a old dell laptop and 3rd party software "Audio Analyzer Suite" it can do THD and all kinds of thing measurements and a lot of video on YouTube but I learning a lot, I think Lol

Oh I have wiggle the pot and it worked (bad pot)

Like I said in a previses post, Visual inspection and sometimes I use a Magnifying glass after cleaning w isopropyl alcohol w a tooth brush. I would clean the board and look for bad solder joint but really look for crack and broken traces and wires. ever time you work on the phase linear and...

Greg before power up , you might want to power up w a Dim Bulb Tester to make sure you don't damage anything.

When I was looking for some, I also looked at the HP 8903B Audio Analyzer and the ATS1 (but you need some optional boards install, if I recall) but their are all old,,,,, and you never know how beat up they are or if they will even work and for how long. What does anybody thing of the HP...

yes The power Transistors when bad will normally short out and blow fuses so your probaley good :) but it would not hurt to see what you have back their which will tell you if they mixed and match them .

Greg Should check the Bis, using the other resistor on the Lt side. I would clean the back of the board w a tooth brush (and do a Visual inspect as you go) and also clean the back and inspect everything after cleaning. after that I would change out both Bias Transistors looks like a Full comp...

Timmienator when you have time, you might want to takes some high quality pic's of the front of each control board so the forum can double check the components.

Very interesting, they know what their doing. I wonder how good new Albums are? Its been trending now w a lot of new bands cutting Albums from digital starting around the middle 2000's

George and Gene Here is a Very Long video of what you just said, Tony show how to use the Micro Insulators w heat sink grease (I still use Micro, hard to overtight them) but he also explains the different between the 2 , good and bad. it's a very good video and about haft way he talks about the...

What kind of flux are you using? and solder? Thanks to Sniffer , I'm using the Kester 951 Liquid Soldering Flux No-Clean, which makes the solder flow better and flow a lot smother and your still look like it is to thick, it should look like a triangle shape I hope this helps.

Good work, You got lucky it did not totally short out ;) I'm still one of the few that use the Micro Insulators and Heat sink grease (never use computer silver grease) I heard of the silicone Pads doing this, Even Gene had one short out when installing a new transistor & cut when installing)

Great Link, just have to sign up and than you can download, it has a daily limit (note the 400 II section link is in the middle of the page) https://www.hifiengine.com/manual_library/phase-linear/400.shtml

Are you using LQ flex? (like Sniffer does)

At this point. is a good time to ohm out the resistors note that their are some that will ohm out haft value because their in parallel (I actually ohm out groups of resistor before I soldered them w a cheat sheet I made) I would check before clipping the ends off but made sure their not...

I was thinking at 1lb it would be a good deal But Wow that's a Great Deal Thanks Joe Update I just order 2