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Well, I believe I figured it out. It doesn't appear to be caused by the 388 at all. I thought I eliminated all the variables when reproducing the problem, but I guess I forgot to disconnect a long set of XLR cables running out of my Model 16 into channel 7 and 8 of the 388. When those cables are...

Thanks @sweetbeats. So that I'm clear, you are suggesting that the faint signal I'm picking up on the scope is HF environmental noise interference, correct? If so, I guess that's both good news and bad news. If the power supply is not the culprit, do you have any thoughts on what else could be...

@sweetbeats thank you. I measured the AC voltage between P5-1 (GND) and P5-2 and it was around 0.02VAC. The same was true for P5-1 (GND) and P5-3 (0.02VAC). The DC voltages were -15V and +14.94V respectively. With respect to the scoped values, here's pin P5-3 below. The scope is set to AC...

@sweetbeats I was able to measure the voltages on P5 and here's what I found: P5-2: -15V P5-3: +15V P5-4: +17.8V The first two were nearly perfect. The last one might be too high? Also, I scoped all three and found some wobble, although I wasn't able to determine the amplitude of the signal...

Thank you, @sweetbeats. I appreciated the detailed response. I have some basic electronic skills and I do have a Hantek 2D72. I also have the operation maintenance manual with schematics and should have the parts lists for the components used in the power supply. I'll start with verifying the...

I did a little more testing. I ran the headphone out to a splitter cable, then into another mixer. I hear the same buzzing as I do in the main and monitor outs. So I tried the headphones again, and I if I turn the Main mix all the way up and then turn up the monitor volume, I hear the buzzing...

Actually, it was super easy to pull the card. I've attached a few pics of the card, and included a link to additional angles below: https://drive.google.com/drive/folders/13Mghllh9uR-PLbRHWhyKf8mGjNgRNxDg?usp=sharing Thank you.

Hi @sweetbeats. I found a video on your YouTube channel that shows that the PCB assembly for the power supply is a pull our card: I will pull it today or tomorrow and get some good pics of it. Curious, are you thinking there's an issue with the power supply? If so, wouldn't that effect the...

Hi folks! My Tascam 388 has buzzing out of the mains and monitor outs. There's no buzzing out of the headphone jacks. I tried different cables, and even outputted the monitor RCA outs to a clean mixer known to not have buzzing, and it still buzzes. With all the faders turned down (including...

Thanks Skywave. I agree on all points.

Thanks. I already have received a refund for this and am considering making the seller an offer as a parts/repair machine if it can be repaired. Seems you are suggesting the logic controller is damaged/defective. Sounds reasonable to me. Any recommendations on troubleshooting steps to help...

I recently picked-up a Tascam 246. It was sold as fully serviced (levels, pots cleaned, the whole 9 yards..). I put a tape in the unit and the first thing is does it eat my tape. I managed to get the tape out, but now the Tascam 246 is stuck in Play/Restore position: Note, the capstan starts...

Turns out Pause will cause the tape head to relax and return to base position long enough to get the tape out. Fortunately the tape was no badly damaged. A few minor pinches on blank space in the very beginning before the recordings start.

Thanks, I'll open her up soon and take a look. Once I figure out the issue, I'll come back and post here.

Thanks for the tips.

Hi, I recently bought a Tascam 246. When I tested it out, it is spinning the tape and the tape inside is bunching up (see pic). When I put the tape in and pressed rewind, once it got to the front of the tape, it started playing and that's when it did this. The tape appears to be salvageable and...

Thanks for the video. I've seen this one before and I tinkered with those sensors a bit when I encountered this problem, but it didn't solve it. I'll probably need to take the thing apart and make sure the belt is still there and manipulate those sensors with the cover off like in the video...

Hi, I was using my Tascam 688 this morning, but all the sudden, the Play and Record buttons no longer function (at the same time). The Play/Record LEDs don't even light up. The guy I bought it from said he recently replaced the belt, and I assume if the belt was the culprit, the Play/Record...