The headphone jack is not PCB mounted, it is panel mounted and point to point wired to the PCB. I’m wondering if yours became detached from the panel and fell down inside the works. You cannot get to anything from the top, you have to access from underneath or kind of from the side. The master section is an assembly of vertical and horizontal PCBs. I have a complete master section around here somewhere…
Thank you Cory, for all your help. I realized I just jumped into this thread after reading only about the first 10 pages or so, then saw that it was inactive for a while, thought I’d ask for help in hopes someone was still around... And there you were! Now that I’m on page 22, and continuing to read, I’m amazed at all you did and documented! Plus to see how you’ve been so awesome to help so many others, it’s really, well.. awesome! Thank you!
I’m going to spend more time with the manual (yes, mine came with it!!), testing each channel with the jumpers I have (until I either create my own, solder some RCA shorties or find some), and reading the two books I just bought to better understand mixing/engineering from a tech point of view.
After reading about your journey, though, I am pretty sure I am going to need to upgrade my soldering iron (450watt radio shack is all I have, which works great on guitars, but is problematic for PCBs) and learn to re-cap, and take this thing apart to get it back up to working condition.
By then, I hope to have my studio delivered, and start work on the interior electrical, insulation and finishing walls and ceilings. It’s only a 12’x10’ portable building, but It will be nice to have my own space to finally get my vintage synths out of storage. Plus I have a new-to-me Tascam Studio 8 388 to play with on top of this M-520!! Oh, and if I really go completely insane… the guy that sold me the M-520 is offering to sell me his MS-16 1” recorder complete set up for $500… that’s another story to be told. Ha ha!
Again, you have been amazing on this forum, I know many many more than I thank you for your service, storytelling and advice… but THANK YOU again anyway! I’ll pay it forward.
P.S. Here is a mockup of my building to be delivered in September:
- Patrick