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Geez I would feel like such an idiot if it was only a fuse! At least I would have learned a bit.... :), the previous owner said he had replaced the fuses with no effect, but at this point in time I should know better then to take someone at their word Cory, I am not at home yet but I will get...

and reading back I suggest you take m1fanatcs advise as well when you are synching.... but this is all really hard to decipher without being able to see how your mixer routes and monitors audio.

No problem, glad you got it to work... Just fyi if you are doing a mix-down use the repro setting as it is a dedicated head for playback. Use the sync for when you are tracking and you want the tracks you have already recorded to be synced with what you are recording. in sync mode the...

I'm not too familiar with Ramsa boards but two things jump out at me... do you have the 38 set to sync or repro? If it is set to input, then that could cause a feedback loop. You don't have line in/tape returns on the individual channels of the board to use? If so that would be the ideal way to...

So... With a 1khz Test Tone, Meters @0, COM connected to pin 1 of P052, I get: Meter Sensitivity @ 20V DC U051 Pin 3 Fluctuating between 0.00 to -0.02, Pin 5 Fluctuating between 0.14 to 0.18 U052 Pin 3 Fluctuating between 0.00 to -0.02, Pin 5 Fluctuating between 0.14 to 0.18 This is a...

I'm using an A & D AD-5526, it's a cheapie and there seems to be little to no references available to it online... but looking it over I've realized there was some user error and that I was measuring DC current where I should have been measuring voltage, I will retest using the proper settings...

Ok, So I had a chance to sit down and check out U051 + U052 right now, here are the results: 60 Hz Tone U51 Pin1 0.2 U52 0.2 @ 200V AC 60 Hz Tone U51 Pin4 0 U52 0.2 @ 200V AC 60 Hz Tone U51 Pin3 -0.1 Pin5 0.1 U52 Pin3 -0.1 Pin 5 0.1...

glad to hear it was not something serious, I was assuming there was probably a user error in there, when I first got my m-520 it took me about half an hour to figure out how to get any sound out of it from anywhere:)

You are visually seeing signal on the vu meter of the board AND the 38? or just the board?

Sounds good, hope you enjoy... 175 for a pristine board sounds a-ok in my book.

Sweet! 3 series boards are seriously good pieces of equipment... were you able to talk him down any? It's funny I just saw two of those local to me, one for 230, and one 250:eek:! Seems outrageous to me.

Cory, The test I referred to was informed to me through a friend. I was able to find this info on the web, it seems you are right that this is a "course" test. The basic premise is to see if the caps are holding the power distributed through the meter. From...

Hey thanks for the reply Beats, heres the actual schematic (sorry about that I missed this one) Caps cant be tested in circuit? I wasn't aware of this... my method for testing was to discharge all the caps on the board set my standard multimeter to its highest ohm setting and then connect...

I don't know how close this is to you... but this may be ideal if you could talk him down a bit on the price. Although that may be a pretty legit price it's really hard to tell seeing as how the fluctuate so often and if you wait long enough you can always come up on a steal...

Allright as it turned out what I had assumed to be transformers were vertically mounted ICs... Here is the schematic, parts list, and part of the data sheet for the IC power amp. I'm not too sure how to go about testing the IC. Caps, diodes, resistors, etc I know. My assumption...

Is the headphone amp located on the same card as the headphone jack? I see no IC located on that card... there are 2 Transformers (unless these are vertically mounted ICs), 6 Electrolytic Caps, 2 Ceramic Caps, A 4 pin wire connector, and 2 points where 2 wires are soldered into the card. The...

Correct me if I'm wrong but wouldn't you also need a direct box? I assume if it has another input besides the phono it's going to be looking for line level impedence.... That said I know nothing about ham radios.

Thanks... I will check it out tomorrow

Hey I came into a M-224 mixer a few weeks ago (traded an mxl-990 for it:D), all of the board seems to work a-ok. With the exception of the headphone jack, which outputs nothing. I was wondering if anyone has any ideas on where to begin the troubleshoot? I've opened the bottom panel and...

You get that from that flake? I saw he posted up again and had figured out how to turn on, the on switch.... subsequently adding 120 to his asking price.