Search This Blog

Showing posts with label Texas Instruments. Show all posts
Showing posts with label Texas Instruments. Show all posts

Tuesday 21 December 2021

#82 RME ADI-8 DS teardown and repair

 A seller on eBay had had a couple of these units listed as faulty for a few weeks, and once i had a bit of spare cash, i decided to take the dive and snap these up. The impetus was two-fold - on one hand, as it turns out, there seems to be a bit of a "disease" going around with power supplies in RME rack units; and on the other hand not long ago, i had noticed an ad from a person in this area actually looking to buy exactly one of these units.

Some extra motivation was prompted by looking up some prices for this thing. Borderline-eyewatering, i'd say. It seems to have retailed somewhere in the 1500e area at launch (1280GBP in 2003), and still selling for anything between 500-800e used (on Reverb.com or Milk Audio Store). Gulp.....

The shipping time was spent more or less being anxious whether i had bought a couple of lemons (for all i knew, the power supplies were missing altogether), or whether i would manage to catch a break and manage to fix these up easily and make some extra cash for the holidays.



Thursday 11 November 2021

#81 MOTU Traveler teardown & upgrade

As a follow-up to the recently posted MOTU Ultralite teardown, i had to grab this as soon as it popped up in my search results, because it had a price i couldn't ignore or refuse, and it had the ideal feature set for recording my band's jams and rehearsals. While the former had most of the features i needed in the 828mk2 i had been using, but in a smaller form factor, this Traveler packs more of the features i need (two extra mic preamps, while retaining the -10dBV/+4dBu line inputs with optional 6dB boost), in an intermediate form factor, as well as having a full 53dB of gain available on the mic preamps, but without weirdo custom potentiometers to wear out. Just about best of all worlds, really, especially for the paltry 85e this cost me. And as the cherry on top, it even has a separate battery input - hello, fully mobile recording sessions...

 

Monday 8 November 2021

#80 MOTU Ultralite teardown

In an interesting turn of events, i actually did NOT get this one as faulty. It was more to relieve one of my 828mk2's from rehearsal-place-recording duty, and on the other hand, i managed to get it for quite cheap. In the context of, faulty ones had similar asking prices, so there's that.


Tuesday 7 September 2021

#77 MOTU Ultralite mk3 Hybrid part one: teardown

Yet another score from the "morgue" - this time around, a feature-packed little bundle of audio joy, namely a MOTU Ultralite mk3 Hybrid. This was up for sale as "no longer powering up", and for a two-figure price, i couldn't pass it up.



Sunday 22 August 2021

#76 Fractal Audio Axe-FX II teardown and repair

A couple weeks back, an acquaintance contacted me about his Axe-FX II suddenly not powering up anymore. I saw this as an opportunity to at the very least take a peek under the hood of one of these things (still selling for four-figure amounts), so why not?

I had neglected to snap photos of the outside of the thing (because other priorities), so you'll have to settle for some "stock" shots. Not that there's anything overly interesting to see anyway.


Sunday 25 July 2021

#74 Focusrite Saffire 6 USB 2.0 modding (for stand-alone operation)

First of all, the main issue with using this stand-alone (without a computer) is that the Xmos controller only enables the analog power supplies (the two MIC2505's and the LM3488) once it's done whatever handshaking it needs to, with the computer. But since i'd only need / want it to act as a rudimentary preamp / mixer / headphone amplifier, i kinda-sorta need the analog supplies working.


#73 Focusrite Saffire 6 USB 2.0 teardown

Initially, i was thinking of getting and modding a Scarlett 2i4 to use as an updated and more flexible in-ear headphone amp, to replace my aging modded M-Audio Fast Track (incidentally, the subject of the very first article on this blog). I even ended up with two 1st gen ones as well as two 2nd gen ones. But recently, i came across yet another deal i couldn't pass up - a Saffire 6 USB for a nearly ridiculous 36e, shipped(!). Virtually the same structure as the 2i4's, but i can definitely get more money (back) from reselling those, and keeping the Saffire. That, and i had come across instructions for a mod to the Saffire 6, to enable stand-alone operation.


Saturday 24 July 2021

#72 MOTU 828 mk3 teardown

Yet another eBay score - caught this one with a blown power supply. Blown, as in, skidmark inside the casing, circuit board scorched, tracks vaporized. But maybe i'll make that into another article on its own, someday. In the mean time, let's take a peek under the hood of one of these arguable "classics".



Tuesday 20 July 2021

#70 MOTU Audio Express teardown

This summer's "already" been quite fruitful, gear-scoring-wise anyway. This find cost me a colossal 86eu, with allegedly none of the outputs working. This, in the context of it retailing for a somewhat eye-watering 500eu(!!!) or thereabouts, brand new. On the bright(?) side, it came with the original packaging, manuals still in their plastic bags, as well as a USB and a Firewire cable to boot, both also still factory-packed. So why not?


Saturday 27 March 2021

#68 Alesis M1 Active Mk2 rehabilitation, part one

Over on the Badcaps.net forums, a thread was started all the way back in 2010, about power supply issues in these arguably "classic" low-cost active studio monitors. It even ended up being stickied just this winter, so it's been quite active and useful. It served as motivation for myself, to take up hunting for faulty ones - not sure if i had gone through three pairs, but at least two pairs i revived and sold off to a couple friends, some 7-8 years ago, and to this day i've yet to hear back about any further issues, so i take that as a good sign. In the mean time, i still contributed with thoughts and advice there, which helped lead to several successes.

Recently, a fellow forum member there got fed up with his failed attempts to revive his pair of monitors, and got himself a pair of new ones. In that context, we struck a deal for the Alesis'es, and a few weeks later, here they are.

Thursday 4 February 2021

#66 Audient iD22 teardown

Despite having hoped to nab an Audient interface for some time now, only quite recently did i manage to get my hands on one. Since i'm a cynical... [ahem] person, after having heard several notable(?) audio engineering channels over on Youtube ranting and raving about these, and the "Audient console preamps", and the "discrete JFET DI" and whatnot, my curiosity was indeed itching to see if and how the reality lives up to all the hype and marketing. 


Friday 18 September 2020

#63 M-Audio M-Track 2x2M C-series teardown & repair

Boy, that's a lot of M's up there... But yeah, here's another eBay score, bought as faulty. Basically, because it was too cheap to pass up, even if it's unrepairable - a paltry 30eu. The ad said it will no longer power up, save for the phantom-power indicator LED, and won't be detected by a computer. But before troubleshooting, it warrants a thorough inspection, inside and out, wouldn't you say?

Monday 25 May 2020

#61 MOTU 896 mk3 Hybrid teardown (post-recap)

Since relatively recently acquiring the MOTU 8M, once i got around to swapping it out for the 896 mk3 in my recording rack, i figured it might be worth doing a quick teardown of the latter, before i sell it off. I've done a really brief one over on the BadCaps.net forums when i first bought it, but it deserves some higher-res photos and a more detailed documentation of its guts. Do keep in mind that it got re-capped as soon as i got my hands on (or into?) it, so the electrolytics are not stock. But
without further ado...


Monday 30 March 2020

#60 MOTU 8M teardown

Well, this one's a "biggie" - i had been lusting after one of these for a few years now, but the price was (and technically still is) on the prohibitive side, retailing at ~$1300-1500, depending where you look. Fortunately though, i've been stalking eBay off and on for one of these, and a used one happened to pop up just the other week, on auction. To my amazement and delight, despite there being at least 6 other "watchers", i was fortunate enough to win it for the opening bid, ie. about half the price of a new one.


Sunday 29 March 2020

#59 MOTU 828 mk2 teardown

Even though this is the 4th or 5th of these units that has gone through my hands, looks like i never documented a teardown of one - shame on me! Time to rectify that issue then, wouldn't you say? I grabbed this one off eBay for about 60 bucks or so, delivered. On one hand, because it was pretty dirt cheap at this money, and on the other hand, because it will be involved in a project idea i had a good few years ago. And yes, "as usual" (by now), this one had a busted Firewire connection, but for my own (nefarious?) purposes, i don't need that anyway.


Tuesday 24 March 2020

#58 Behringer FirePower FCA1616 teardown

Long time no see, eh? Well, what can you do when the new job's kicking you in the rear end? Regardless, new patient on the table this time around - A not-that-often-encountered Behringer audio interface (now discontinued, "obviously"). I took the gamble on it primarily because it was cheap, secondly because i wanted to take a peek under the hood, and somewhat connected to that, curious about if and what "magic mojo" might the touted Midas preamps contain.


Monday 4 November 2019

#56 Apogee Ensemble Firewire teardown

[[[ Repair can be found here ]]]

This came up on eBay the other week as faulty - inputs 1/2 and outputs 1/2 seemingly dead. First instinct was, 'obviously', look up photos online in the hope of finding some internal shots. A few minutes later, bingo: four CS4272's in there. Now, what're the odds one of them is handling the bad pair of ins & outs? Quite a bit higher than the analog input of one, and the analog output of another to be bad, wouldn't you say? But let's not get ahead of ourselves (too much), and take things one step at a time...



Saturday 14 September 2019

#52 Solar A2.7 & Fishman Fluence Keith Merrow, part two

Aaaaand it's back! Not because of technical issues though. Due to chance, and the limited speed of international shipping, only the day after the owner got his guitar back, did the Fishman rechargeable battery-pack get delivered, just only too late to include it in the previous operation. But no matter, this should be far less involved than that.



Sunday 8 September 2019

#50 Philips HTS7201 Soundhub Home Theater (2.1) teardown & repair

This just came in, with the symptom description of "will no longer turn on". Fair enough, sounds like a power supply issue then. Apparently this retailed around $400-ish when new (according to a 2012 review i found online) - not exactly bottom-of-the-barrel, but it's still very much in the mainstream/consumer range, so i'm expecting crap caps to be the root cause. But time will tell.



Saturday 7 September 2019

#49 Joyo ZoMBie, part two - analysis and repair

It took the best part of an evening and a couple hours the next day, but i managed to lift the schematic for the whole preamp board. I also recreated the board, but that was mostly for sanity-checking. I used all the same component designators, but didn't bother measuring all the dozens of small ceramic caps, because there's only SO far i'm willing to go...