Digitech TSR-24 misbehaving

Archived from groups: rec.audio.pro (More info?)

My TSR-24 effects box started to switch programs on it's own. Also the data
wheel only decreases the program number, regardless if it gets turned
clockwise or counterclockwise. I changed the internal battery, called the
system reset. If I stop using it for a while, it start bugging again. I
noticed that if I leave it on for a few hours it goes back to normal
operation.

Any hints?

Toby

Archived from groups: rec.audio.pro (More info?)

I was considering updating the firmware chipset but I'm not sure if the rest
of the hardware is ok. I'll probably replace it with an updated, used unit.

Toby

"David Morgan (MAMS)" <mams@NOSPAm-a-m-s.com> wrote in message
news:%BKZd.6890$Z07.493@trnddc02...
>
> "Toby" <tobyYourFootFromYourMouth@coqui.net> wrote in message
> news:89d99$42376fd6$4117c27b$14864@COQUI.NET...
>> My TSR-24 effects box started to switch programs on it's own. Also the
>> data
>> wheel only decreases the program number, regardless if it gets turned
>> clockwise or counterclockwise. I changed the internal battery, called
>> the
>> system reset. If I stop using it for a while, it start bugging again. I
>> noticed that if I leave it on for a few hours it goes back to normal
>> operation.
>>
>> Any hints?
>>
>> Toby
>
>
> Without really knowing, sounds like a logic chip or power supply...
> perhaps even just a cold solder joint.
>
> If it were me, I'd probably just start leaving it lit 24/7.... but if
> it's
> actually a power supply issue, I might not be doing it any favors.
>
>
> --
> David Morgan (MAMS)
> http://www.m-a-m-s DOT com
> Morgan Audio Media Service
> Dallas, Texas (214) 662-9901
> _______________________________________
> http://www.artisan-recordingstudio.com
>
>

Archived from groups: rec.audio.pro (More info?)

"Toby" <tobyYourFootFromYourMouth@coqui.net> wrote:
>
> My TSR-24 effects box started to switch programs on it's own. Also
> the data wheel only decreases the program number, regardless if it
> gets turned clockwise or counterclockwise. I changed the internal
> battery, called the system reset. If I stop using it for a while, it
> start bugging again. I noticed that if I leave it on for a few hours
> it goes back to normal operation.



I had a Digitech vocalist that did similar stuff (except for the part
about getting better if I left it on -- it didn't). The problem with
mine was a dried-out capacitor in the power supply. Check that.

--
"It CAN'T be too loud... some of the red lights aren't even on yet!"
- Lorin David Schultz
in the control room
making even bad news sound good

(Remove spamblock to reply)

Archived from groups: rec.audio.pro (More info?)

"Toby" <tobyYourFootFromYourMouth@coqui.net> wrote in message
news:89d99$42376fd6$4117c27b$14864@COQUI.NET...
> My TSR-24 effects box started to switch programs on it's own. Also the
> data wheel only decreases the program number, regardless if it gets turned
> clockwise or counterclockwise. I changed the internal battery, called the
> system reset. If I stop using it for a while, it start bugging again. I
> noticed that if I leave it on for a few hours it goes back to normal
> operation.
>

It may just be a faulty datawheel, or dry joints on the datawheel. Check
all the connections around it, or if you are up to it, change it. Often
these are off the shelf Alps parts at between 5 and 10 dollars or so.
Sometimes they are not and you have to get it from the manufacturer.



For the interested, the datawheel produces 2 squarewaves when turned, one of
which will lag the other depending on direction of travel One of these may
be missing, meaning it will only ever decrease the program number. The
other may be intermittent, fooling the microprocessor into thinking you have
turned the wheel.


Gareth.

Archived from groups: rec.audio.pro (More info?)

In article <6bOZd.691935$6l.455720@pd7tw2no> brownbag@NOSPAMmindless.com writes:

> A tech showed me a trick...they make a lot of money at this, and I'm letting
> the cat out of the bag...but...
> Open the unit, firmly press down on the dsp chip. Chances are, it has
> become unseated, due to heat contraction and expansion.

I was working on a show with John V several years ago. The star was
just getting set up and his digital processor wasn't working. John
told him to look the other way, lifted it up and slammed it down on
the stage, and it came back to life.

Same thing, just not as expensive.



--
I'm really Mike Rivers (mrivers@d-and-d.com)
However, until the spam goes away or Hell freezes over,
lots of IP addresses are blocked from this system. If
you e-mail me and it bounces, use your secret decoder ring
and reach me here: double-m-eleven-double-zero at yahoo

Archived from groups: rec.audio.pro (More info?)

In article <znr1110976889k@trad> mrivers@d-and-d.com (that's me!) writes:

> John
> told him to look the other way, lifted it up and slammed it down on
> the stage, and it came back to life.

Now that I think of it, I seem to recall that it was a Digitech
processor.

--
I'm really Mike Rivers (mrivers@d-and-d.com)
However, until the spam goes away or Hell freezes over,
lots of IP addresses are blocked from this system. If
you e-mail me and it bounces, use your secret decoder ring
and reach me here: double-m-eleven-double-zero at yahoo

Archived from groups: rec.audio.pro (More info?)

"Toby" <tobyYourFootFromYourMouth@coqui.net> wrote in message
news:9c7fc$4239191d$40ed81fe$3830@COQUI.NET...
>I initially blamed the data wheel itself, but, what can make it work well
>by just leaving it on for 4-6 hours? By the way, I just turned the unit on
>now and it works fine after being off for 24 hours. But, I know it will do
>the stupid one-way data wheel trick if I leave it off for more than a week.
>
> I'll open it again to check the wheel and stomp on the dsp chip. Thanks
> for the suggestions.
>

Stomp on all the big chips in chip carriers. The Data Pot will connect
directly to the processor chip not the DSP.

Archived from groups: rec.audio.pro (More info?)

This box is notorious for power supply connections going bad..
I have two of these boxes that I've salvaged with this problem.
One indication that the PS is related is if the display flickers
in brightness.. Another symptom is that the unit intermittently
resets.. I have to believe that there are more symptoms as well,
but in both the cases I've seen, the display was also flickering
in brightness...

BTW, as you know, These are nice sounding reverbs..

Google Groups for:
"Digitech TSR-24 glitch and FIX"

to get the original solver of this problem. (Thanks Craig Stuntz)

Archived from groups: rec.audio.pro (More info?)

"Toby" <tobyYourFootFromYourMouth@coqui.net> wrote in message news:72d14$423aed2e$4117c0b6$15082@COQUI.NET...
> Thanks for the info. I use the unit exclusively to process an amplified
> classical guitar. Boy, it surely sounds nice, but it's starting to show
> it's age.
>
> Toby

In what way? Face plate scratched? ;-)

It's still a pretty quiet processor with some nice presets and it's
packed with massively 'tweakable' parameters on all patches.
I've still got a couple of them... one I grabbed on e-Bay a couple
of years ago for $170, and they sold new for $1100+.

I gamble that after checking the solder joints on the jog-wheel,
reseating all chips, and doing any power-supply fixes that are
needed, you can get a lot more years out of the box.

DM

>
> "Steve Ryan" <sryan@tendb.com> wrote in message
> news1c3330s0t@drn.newsguy.com...
> > This box is notorious for power supply connections going bad..
> > I have two of these boxes that I've salvaged with this problem.
> > One indication that the PS is related is if the display flickers
> > in brightness.. Another symptom is that the unit intermittently
> > resets.. I have to believe that there are more symptoms as well,
> > but in both the cases I've seen, the display was also flickering
> > in brightness...
> >
> > BTW, as you know, These are nice sounding reverbs..
> >
> > Google Groups for:
> > "Digitech TSR-24 glitch and FIX"
> >
> > to get the original solver of this problem. (Thanks Craig Stuntz)
> >
>
>

Just completed my first TSR-24 refurb.

The 2 top allen-type screws on the TSR faceplate needed unscrewing for the cover to come off.

I pushed on all the bigger DSP chips to reseat them just in case they were loose ...

...cleaned and resoldered several rusty/dried solders on the power supply circuit board, ....

...cleaned whatever internal pots and I/O contacts I could get to with DeoxIT..

....treated as many rusty spots on the chassis and cover as I could ...

....and finally replaced/refastened the cover.

The unit is powered up and exhibiting none of the problems that drove me to perform all this surgery on it.

Thanks to everyone for the tips ... I will keep you all posted on how long this fix lasts.