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TR76 dropouts?

 
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Kukulkan



Joined: 13 Mar 2009
Posts: 21
Location: Germany

PostPosted: Fri Jun 24, 2022 9:06 am    Post subject: TR76 dropouts? Reply with quote

Hi, I use my TR76 for many years and I'm still happy with it. Now I'm in a new live band and in the last band practice I noticed some dropouts during holding a note or chords. It feels like someone does a MIDI reset, stopping all sound immediately for a few microseconds.

I did not manage to find out for sure if the release phase of a sound (or effects like reverb and delay) also stop or if simply the playing of the notes is stopping (like releasing the keys on the keyboard). But I have the strong feeling that it completely mutes, cutting the release phase of the sounds, too. Like an immediate reset of the sound engine.

The dropouts happen every now and then, it may happen only once in an hour or even after a few minutes. It is completely random.

As I use it only in COMBO mode, I don't know it this also happens in PROG mode. If I try to reproduce, it only happens very rarely. But annoying in live for sure.

My setup is simple, I only use another keyboard connected to TR76 MIDI-IN as second keyboard (sending on channel 2).

Any idea what the reason might be? Any chance to repair such? As it is hard to reproduce and test, it is important if this is a known issue somehow?
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stuartpryer
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Joined: 10 Jan 2002
Posts: 354
Location: Cornwall - U.K.

PostPosted: Fri Jun 24, 2022 10:20 am    Post subject: Reply with quote

Hi,

Intermittent faults are really tricky to track down. Possibly caused by a faulty connection. Does it happen with headphones. Have you tried using different cables?

Cheers stuart
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Stuart Pryer
Triton Controller, Midi toolbox and Fractal Sequencer Software
web site https://stuartpryer.co.uk
e-mail stuartpryer@gmail.com
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Kukulkan



Joined: 13 Mar 2009
Posts: 21
Location: Germany

PostPosted: Fri Jun 24, 2022 10:57 am    Post subject: Reply with quote

Thanks for your fast reply, Stuart.

No, I did not yet play with headphones, as I use the TR76 in live situations only (band). But I tried other cables to the PA and it did not help.

If I play the keyboard again directly after I notice a dropout, it plays again immediately. IMHO, it is not related to cables.
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stuartpryer
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Joined: 10 Jan 2002
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Location: Cornwall - U.K.

PostPosted: Fri Jun 24, 2022 11:30 am    Post subject: Reply with quote

Hi again.

You could try resetting the instrument to factory settings. Reload just the factory pcgs and play it for a few hours and see if problem reappears.

My guess if that fails is either its a dirty / corroded connection internally. Or a failing capacitor? With the former you could open it up and reseat the various cable connectors after applying contact cleaner.

With failing components its more difficult. You would need to get a specialist to check it out but if its intermittent its not going to be easy for them to trace.

Cheers

Stuart
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Stuart Pryer
Triton Controller, Midi toolbox and Fractal Sequencer Software
web site https://stuartpryer.co.uk
e-mail stuartpryer@gmail.com
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Kukulkan



Joined: 13 Mar 2009
Posts: 21
Location: Germany

PostPosted: Fri Jun 24, 2022 12:22 pm    Post subject: Reply with quote

Thanks again, Stuart.

I think I will make a system backup to the SD card and then open the keyboard. Will re-plug all plugs and cables where possible and also looking for corrosion and domed capacitors. Keep fingers crossed I find something. If I find something, there is a chance to fix it. Wink

If that does not help, I will do the factory reset and restore the presets I need. I will report here next week.
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Kukulkan



Joined: 13 Mar 2009
Posts: 21
Location: Germany

PostPosted: Tue May 23, 2023 6:25 am    Post subject: Reply with quote

Unplugging all internal cables and reconnecting them with contact cleaner did not help. The problem remains. There is still a dropout about every one to two hours.

I now replaced this keyboard with another one. So sad Sad
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