Repairing Alesis MidiVERB III

[Brian Hook]

I have a 3 year old MidiVERB III that was working beautifully and then one
day it didn't power up, i.e. plugging in the 9V adapter didn't cause any
lights or anything to come on. I've checked the transformer, and it seems
to work just fine, and then I opened it up looking for a fuse, and couldn't
find any.

It's not cost effectie to take it into a shop for repairs (that would cost
almost a hundred bucks, and I'd rather just get a Quadraverb for 400 in
that case), so I'm trying to fix it myself....

Any suggestions?

Thanks,

Brian
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[Robert Fries]

In article <BWH.94Ma...@native.cis.ufl.edu> b...@native.cis.ufl.edu (Brian Hook) writes:
>
>I have a 3 year old MidiVERB III that was working beautifully and then one
>day it didn't power up, i.e. plugging in the 9V adapter didn't cause any
>lights or anything to come on. I've checked the transformer, and it seems
>to work just fine, and then I opened it up looking for a fuse, and couldn't
>find any.
>
>It's not cost effectie to take it into a shop for repairs (that would cost
>almost a hundred bucks, and I'd rather just get a Quadraverb for 400 in
>that case), so I'm trying to fix it myself....

How did you check the transformer, that's still my first bet.

I just called Alesis (1-800-5-ALESIS), they said the maximum repair
bill for a Midiverb III is $55 - and it could be less.

So, assuming your transformer is OK, repairs would be less than
$65 including shipping to Alesis (they pay return shipping.)

I'll give you $50 for the unit, sight unseen.
Robert

[Mark Gardner Gibson]

I recently repaired one of these for a friend of mine.

The problem was in the choke (used to remove ripple and/or RFI) right
next to the power-in jack. The solder joint holding one of the wires
to the board was faulty. A quick touch with the soldering iron fixed
it perfectly.

I've found this problem on many devices with circuit boards -- heavy
components rattle around until they break free from the solder. To
find exactly where the fault is, plug in the device and follow the
path the power should take with a voltmeter. When the power
disappears, you've found the problem.

Good luck.

Mark
(gib...@wpi.wpi.edu)

[Hallvard Tangerås]

In article <BWH.94Ma...@native.cis.ufl.edu>, b...@native.cis.ufl.edu (Brian Hook) writes:
>
> I have a 3 year old MidiVERB III that was working beautifully and then one
> day it didn't power up, i.e. plugging in the 9V adapter didn't cause any

> lights or anything to come on.........................................
> Any suggestions?

Well, is the power supply getting VERY hot? Are there strange sounds coming from it?
Have you actually tried using the unit? I mean, it could be the LCD or LCD backlight
dying! And the rest could be working.
I really need some more info in order to give you more suggestions.

Hallvard, Oslo, Norway

[Neal Howard]

In article <2rdsg6$2...@gyda.ifi.uio.no>,

Hallvard Tangerås <hall...@ifi.uio.no> wrote:
>
>In article <BWH.94Ma...@native.cis.ufl.edu>, b...@native.cis.ufl.edu (Brian Hook) writes:
>>
>> I have a 3 year old MidiVERB III that was working beautifully and then one
>> day it didn't power up, i.e. plugging in the 9V adapter didn't cause any
>> lights or anything to come on.........................................
>> Any suggestions?

Also check for small (0.1mfd) capacitors that have shorted out (you'll see
the burned discoloration.... they used to be either blue or yellow) at
various places on the circuitboard. I have repaired about a half dozen
older MidiVerb's that have had this particular failure. Sometimes the
copper trace on the circuit board burns in two. In all cases, a new cap
plus bridging the burned-thru trace brought the units back to life for me.
I suspect they got a batch of bad caps that didn't live up to their working
voltage rating.
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= Neal Howard ne...@metronet.com '91 XLH-1200 DoD #686 AMA HOG =
= "Fuzzy Wuzzy was a bear, Fuzzy Wuzzy had no hair. If Fuzzy Wuzzy =
= had no hair, then Fuzzy Wuzzy wasn't Fuzzy, wuz he ?!!!" =
=====================================================================

[michael...@gmail.com]

Hi this might be a shot in the dark but do you know where i can get the blue small (0.1mfd) capacitors you mentioned above. i have a unit with one of these burned out.
cheers
michael

[j.bor...@gmail.com]

same thing happened with my midiverb 2,any one know how to fix it?