Damaged buttons on Evolver Desktop after attempt at repair

Damaged buttons on Evolver Desktop after attempt at repair
« on: August 10, 2024, 04:34:38 PM »
Hi everyone,

I've had an Evolver for about 9 years and I love it dearly.
I bought it used from the UK (I'm from Lisbon - Portugal) and it came with slightly unresposive buttons but still usable.
A few months ago it started to become impossible to use to I decided to replace all the switches.
I thought it would be simple so I didn't bother to research anything online.
If I had, I'd have read the excellent advice given elsewhere on this forum about pressing the buttons harder a few times until they work correctly again, and wouldn't have attempted to replace them.
I dessoldered the old switches and soldered new ones.
Some work, some don't.
Sequencer - 2 - 3 - Shift - Start/Stop and Reset work.
Main - 1 - 4 - 5 - 6 - 7 - 8 don't.
On top of that, after a few seconds of operation, something is triggered and the LCD displays the number 4 and then starts a countdown to 1. Then it loops to 4-3-2-1 again. Pressing the buttons that are still working doesn't do anything.
I'm not sure if it's an error/diagnostics message or some other mode I haven't used before.
I'm afraid I might have damaged something irreparably like the board.
I'd please like some advice or info.
Thanks in advance

Frederico


Re: Damaged buttons on Evolver Desktop after attempt at repair
« Reply #1 on: August 12, 2024, 09:52:37 AM »
I wonder if the soundtower PEK editor could be used to control your unit in a pinch? (that is if its truly just a switch defect).  Though, it sounds like enough bad stuff is happening on it now that its probably the board.
Sequential/DSI Equipment: Poly Evolver Keyboard, Evolver desktop,   Pro-2, Pro-3, OB6, P-12,
 

https://Soundcloud.com/wavescape-1

Re: Damaged buttons on Evolver Desktop after attempt at repair
« Reply #2 on: August 13, 2024, 05:02:50 AM »
I wonder if the soundtower PEK editor could be used to control your unit in a pinch? (that is if its truly just a switch defect).  Though, it sounds like enough bad stuff is happening on it now that its probably the board.

Hi @Soundcloud

Thanks for your input. It's actually a very good idea.
I thought that I could program it via SySex.

The only problem is that the synth is kind of unusable right now.
I can get it to respond to MIDI and make sound, but after a few seconds it crashes / resets to that 4-3-2-1 counter.
I tested with a sequence and it responds to notes and CC, but then there's an audible crack and the 'clip' LED lights up after the first 4-3-2-1 sequence. Then it keeps looping forever.

If it wasn't for that, using an editor instead of buttons would be fine and not mess with my workflow too much.

Thanks again

Re: Damaged buttons on Evolver Desktop after attempt at repair
« Reply #3 on: August 13, 2024, 09:04:32 AM »
Sorry to hear that happened.  I have one of the PEK's with the faulty encoders, so I replace two of the bad acting ones myself with a soldering iron.  It wasn't a pretty job by me, but the replacement pots worked fine when I got done.   Talk to service department and see if this is worth fixing.  Unlike the racks and keyboard ones, there still a lot of table models out there.   
Sequential/DSI Equipment: Poly Evolver Keyboard, Evolver desktop,   Pro-2, Pro-3, OB6, P-12,
 

https://Soundcloud.com/wavescape-1

gus

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Re: Damaged buttons on Evolver Desktop after attempt at repair
« Reply #4 on: August 19, 2024, 02:56:43 PM »
Hi everyone,

I've had an Evolver for about 9 years and I love it dearly.
I bought it used from the UK (I'm from Lisbon - Portugal) and it came with slightly unresposive buttons but still usable.
A few months ago it started to become impossible to use to I decided to replace all the switches.
I thought it would be simple so I didn't bother to research anything online.
If I had, I'd have read the excellent advice given elsewhere on this forum about pressing the buttons harder a few times until they work correctly again, and wouldn't have attempted to replace them.
I dessoldered the old switches and soldered new ones.
Some work, some don't.
Sequencer - 2 - 3 - Shift - Start/Stop and Reset work.
Main - 1 - 4 - 5 - 6 - 7 - 8 don't.
On top of that, after a few seconds of operation, something is triggered and the LCD displays the number 4 and then starts a countdown to 1. Then it loops to 4-3-2-1 again. Pressing the buttons that are still working doesn't do anything.
I'm not sure if it's an error/diagnostics message or some other mode I haven't used before.
I'm afraid I might have damaged something irreparably like the board.
I'd please like some advice or info.
Thanks in advance

Frederico

Sorry to hear about this! I would strongly recommend bringing the synth in to a qualified local technician (a synth tech, ideally). They can remove all of the replaced switches and clean the areas then assess any damage. The part for the replacement switch is TL1105SP-F160Q. The countdown sounds like calibration, which is run by holding Row 1 button, then pressing Row 5 button.
Sequential | Oberheim

Re: Damaged buttons on Evolver Desktop after attempt at repair
« Reply #5 on: June 06, 2025, 05:41:48 AM »
Just chiming in to say that I have also experienced the “countdown of doom” as I call it.   Have had my desktop evolver purchased as open box from RobotSpeak in San Francisco for about 10 years.   It only started doing it within the past couple years.  At first it was an isolated incident, then it began happening more frequently.

I will be using it and it will lock up. It stops responding to knob movements and will stop the sequencer but sustain whatever sound is playing.   Then like you mentioned the screen will start counting down from a random number.   4 is a number that shows up often but it’s also sometimes a random number like in the 40s or less.  Sometimes it’s a slow countdown, and other times it counts down faster.   Once it finishes the countdown or gets down to 0, one of three things will happen.

1) It just goes back to normal and continues playing whatever sequence was playing before it froze, if the sequencer was running that is.

2) It outputs no sound at all.

3) It outputs a very high level of noise.  Like if you had noise generator turned up to 100 along with master volume, patch volume,  vca all turned up to 100 as well.   But possibly even louder than that it seems.

For me unplugging it and plugging it back in seems to fix it.  But it will happen again most likely, because it’s completely random for me now. I could go days or weeks without seeing it.  Or I’ve had it happen multiple days in a row or even multiple times in one session


I have gotten it on video but just a few times and never the whole before and after process.  This was just me pulling my
Phone out real quick then recording it happening to document and see what the outcome would be.

https://youtu.be/8KaBfITCoAg?si=TAdol7wYSMkjOVgg


https://youtu.be/8KaBfITCoAg?si=TAdol7wYSMkjOVgg

Re: Damaged buttons on Evolver Desktop after attempt at repair
« Reply #6 on: June 06, 2025, 02:27:12 PM »
It’s at the end of the video i linked above in previous post^^. Forgot to mention that, and sorry  I haven’t figured out how to properly embed links.  I tried normally just copying and pasting, but also using the little url tool thing  above the text box