I have a Neotek Series 1e 10-channel + stereo bus sidecar with 11-segment (and Peak LED) meters, and for the past 16 years of ownership something with the meter connections has never seemed quite correct. The peak LED's have never worked, other than being dimly on all of the time on all 12 meters. However, if I touch the bottom mount screw on the faceplate, it toggles turning them on and the meter off on that corresponding channel, and vice versa when I touch it again. There's a resistor that has a trace that connects to that mounting pad, but it is a dead end as that pad connects to nothing conductive currently (the faceplate is some sort of plastic). I thought about just pulling the Peak LED out, because I don't know why I need a -10dB peak LED anyway, but I want things to be correct. I have some down time right now and decided to finally pull them out and try to check making them right off the list. I gave up on trying to track down a schematic, so I've spent the past few days drawing the board and component placement to scale in AutoCAD, labeling everything with a reference number, mirroring it so I could draw the traces (1-sided board), then drawing the schematic from that, but I can't make sense of what the issue is or if the rest of the power and grounds are hooked up correctly. Could someone take a look at the attached schematic and help me make some sense of it? Pins 1-8 are connected to all 12 meters via bus wire, with 9 & 10 receiving unbalanced signal via each channel. I have two red text boxes in the schematic and colored some wires red, noting where something isn't or may not be correct. I apologize in advance if the schematic isn't drawn perfectly to U.S. military or secret government standards; I'm fairly new to that side of things and did my best. Feel free to let me know if I need to add any more information!
This would be a luxury modification, but I also don't like that they top out at +3dB (over 0VU), rendering them pretty useless for reliably monitoring sharper transient instruments going to tape, and tracking drums with them has been their primary use. My Otari Series 54 console's meters go up to +18, and I keep them in Peak mode for monitoring certain instruments like drums, percussion, and acoustic guitar going to tape, and use the tape machine's VU's for monitoring other things like bass, electric guitar, vocals, etc. Where would be the best place to add a trimmer to be able to calibrate the Neotek's meters to top out at something like +10dBu? And this is super luxury dream, but is there a spot I could add a trimmer to adjust brightness?
Thank you!
This would be a luxury modification, but I also don't like that they top out at +3dB (over 0VU), rendering them pretty useless for reliably monitoring sharper transient instruments going to tape, and tracking drums with them has been their primary use. My Otari Series 54 console's meters go up to +18, and I keep them in Peak mode for monitoring certain instruments like drums, percussion, and acoustic guitar going to tape, and use the tape machine's VU's for monitoring other things like bass, electric guitar, vocals, etc. Where would be the best place to add a trimmer to be able to calibrate the Neotek's meters to top out at something like +10dBu? And this is super luxury dream, but is there a spot I could add a trimmer to adjust brightness?
Thank you!
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