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can my alesis quadraverb be saved?
Old 17th July 2015
  #31
Gear Maniac
 

yea i agree. I'll probably go that route. what's nice is that when i test with local guy I know (eventually) i can also find out if the power cord I have is good.. if it is i see some decent deals for units without power cord.. we'll see. i have other units to play with in the meantime. Still would be great to save this sucker..

I also know this guy here in town that buys broken stuff to fix.. i might see if I just donate it to him to see if he can fix it for the practice and if he can't.. oh well.. no worse off.
Old 23rd August 2019
  #32
Here for the gear
 

Quote:
Originally Posted by part12studios View Post
yea i agree. I'll probably go that route. what's nice is that when i test with local guy I know (eventually) i can also find out if the power cord I have is good.. if it is i see some decent deals for units without power cord.. we'll see. i have other units to play with in the meantime. Still would be great to save this sucker..

I also know this guy here in town that buys broken stuff to fix.. i might see if I just donate it to him to see if he can fix it for the practice and if he can't.. oh well.. no worse off.
Hi, I know all this happened 4 years ago but I hope that training my necromancy skills will help me bring my Quadraverb back to life... What was the final outcome - were you able to fix, or did you had to dump it?

I got an Quadraverb with new blue lcd (replaced by some previous owner). It boots up and can be controlled from front panel but even if no inputs are plugged in, there is weird digital distortion on the output. With some audio plugged in, the distortion is mixed with original signal. The DSP and some other chips (RAM, i think) are quite hot to touch, so I am afraid they are gone... The only visible damage on the board was broken cap right after power input...

So technically, it is not dead yet... It feels fine... But is far from being useable.
Old 24th August 2019
  #33
Gear Maniac
 

Well i never did find a fix for mine. if you know of any audio specialists they might know what's going on but i don't know if any easy / obvious fix for digital distortion and such. Good luck though.
Old 24th August 2019
  #34
Here for the gear
 

I believe that in my case at least the DSP ASIC had been fried, so there is not much that could be done... Who knows what other components were damaged as well... Not worth the hassle :-(
Old 24th August 2019
  #35
Quote:
Originally Posted by part12studios View Post
Well i never did find a fix for mine. if you know of any audio specialists they might know what's going on but i don't know if any easy / obvious fix for digital distortion and such. Good luck though.
I thought you were taking it to your friend who repaired stuff just for giggles and experience?

The thing with the capacitors is that, even if you screw it up (and that's fairly difficult to do), you won't damage the unit--it just won't work. Since it really doesn't work now, you have nothing to lose! The capacitors themselves will cost you less than $2, more than likely, and could contribute to the display and distortion problems you were having.

Quote:
Originally Posted by Gearlust View Post
I believe that in my case at least the DSP ASIC had been fried, so there is not much that could be done... Who knows what other components were damaged as well... Not worth the hassle :-(
Have you checked eBay (or a local thrift shop) for one that someone's trying to give away for parts? replacing a few parts with other parts you got for (hopefully) free might salvage this iconic piece of early-'90s music tech.

Of course, you both may have moved on from these boxes by now, and that's understandable. Like the OP, I have a soft spot for the sounds gear like this makes, so I generally try to encourage people to keep it working as long as possible.

Then again, as a late-'80s sage once offered:
"You got to know when to hold them,
Know when to fold them,
Know when to walk away,
And know when to run...."

I'm not sure what he was referring to back then (the original context is lost to time), but man...that's some good stuff right there.

Steve
Old 24th August 2019
  #36
Gear Maniac
 

nah just wasn't worth it. poked around a little. just not worth the time or effort..
that guy I knew never panned out.. like kenny rogers said, you gotta know when to walk away (recycle)..
Old 21st February 2020
  #37
Here for the gear
 

Hi,

I got a second had quadraverb and after replacing the screen with a new one it works and turns on, but there is not any character on the screen. Did you have the same problem or maybe there are other damaged components?

I would appreciate some help with this.

Thanks
Old 24th February 2020
  #38
Gear Maniac
 

I never change the display. Are you certain that it is exactly the same part that you’re replacing it with? I recently replaced an ART display from a mach ii SGE versus a non-Mach ii sge. The ribbon design was the same. The pins were the same. But apparently digitally they were not because the display was screwed up.
Old 4 weeks ago
  #39
Here for the gear
 

Hi,

Thank you very much for your reply.

I think the display should be the same as I bought it from here and it is the proper one for replacement:
https://www.circuitbenders.co.uk/for.../HRscreen.html

My quadraverb turns on, but there is not any character on it even being the display very bright. And I can not see any topic related to this on the manual.
Old 4 weeks ago
  #40
Gear Maniac
 

what was the old display doing? was it still displaying characters?
Old 4 weeks ago
  #41
Here for the gear
 

No character, only a very very weak light. That is why I thought it was a display problem.
Old 4 weeks ago
  #42
Gear Maniac
 

ah ok hmmm yea maybe you could replace the eprom.. you can get them pretty cheap.. $20 or so is about the going price.. maybe the eprom (operating system) chip has gone bad.

does the unit actually produce sound/effects? is the display just not showing information, but it actually still works?
Old 4 weeks ago
  #43
Here for the gear
 

Hey, thanks for the heads up. Yes, the display works perfect but not showing information. I will try to see if it produces sound these day

I was wondering how can I know that I need to change the eprom. I already checked the battery with an ammeter and it is completely fine so I avoid to buy a new one.

Again thank you very much for your kind help
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