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Viewing topic "yamaha motif XS contact or processor problem"

     
Posted on: May 23, 2016 @ 02:28 AM
nitugeorgian@gmail.com
Total Posts:  3
Joined  05-23-2016
status: Newcomer

A few weeks ago, at a gig, after 10-15 minutes of playing, when changing betwin sounds, the keybord stopped working (I was playing notes, but no sound came out-the connection between the mixer and the keyboard was fine). I did a couple of slides, up and down the keys, it worked, I could hear every note, but when I immediatly played a chord, no sound. I swiched it off and on, no sound.
I went to the local yamaha service, after 15 min of normal playing, it did almost the same thing: this time all the C notes and F sharp notes accross the keybord were not working(the other keys worked propperly this time), although it was more like a fading of the sound...when pressed reptedly, the same key sounded softer, or louder, or not at all; some notes had sustain on for 3-4 seconds(with no sustain aid form the pedal, or sound settings).
I was told it was a matter of contact strip replacement(all 76 of them), and that yamaha does not have on stock the specific contacts, and that they stopped making them for the XS series.
A second opinion(not yamaha staff) was that it’s a proccesor issue, and that the main processor would have to be replaced. Again, I was told that it was a job that only yamaha services can do.
Are any of these observations valid? is it the contacts? is it the processor? is it something else?
Thank you in advance

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Posted on: May 23, 2016 @ 04:11 AM
meatballfulton
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Total Posts:  3019
Joined  01-25-2005
status: Guru

If you have problems with the same keys in every octave, it points to the processor that scans the keys.

Either way, just take it to an authorized Yamaha service center.

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Posted on: May 23, 2016 @ 04:40 AM
5pinDIN
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Joined  09-16-2010
status: Legend

Welcome to the forum.

The FSX keybeds used in the XS are also used in the XF, and therefore the contact strips should be available. However, based on the intermittent nature of the problem, and that different keys are affected at various times, it’s unlikely that the key contacts are the major issue, if at all.

Problems such as you’ve described often are due to bad connections. That can be caused by corrosion at the cables that connect the key contact boards to each other and the key matrix processor, or corrosion of foil traces or vias on the contact boards themselves. Those issues tend to occur more frequently in areas of high humidity and/or “salt air”, such as close proximity to a sea or salt mine.

The C and F# keys all share the MK15 and MK25 lines to the key matrix processor. While that could indicate a processor problem, bad connections due to corrosion is more common. If you’re lucky, cleaning of the keybed cable interconnections will resolve the problems.

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Posted on: May 23, 2016 @ 09:04 AM
nitugeorgian@gmail.com
Total Posts:  3
Joined  05-23-2016
status: Newcomer

Thank you for your fast reply

Today I linked the XS to a small controller via midi. Where the motif had the same bug with the keys(this time it was a E flat), the midi controller had none. Would this rule out the processor issues?

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Posted on: May 23, 2016 @ 09:09 AM
nitugeorgian@gmail.com
Total Posts:  3
Joined  05-23-2016
status: Newcomer

Is it possible I can get a service manual for the Xs series? I tried asking at our local yamaha service, but they could not help

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Posted on: May 23, 2016 @ 05:17 PM
5pinDIN
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nitugeorgian@gmail.com - 23 May 2016 09:04 AM

Thank you for your fast reply

Today I linked the XS to a small controller via midi. Where the motif had the same bug with the keys(this time it was a E flat), the midi controller had none. Would this rule out the processor issues?

That would not rule out the key processor. MIDI note-on/note-off/velocity messages from an external controller entirely bypass the built-in key processing of the XS.

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Posted on: May 23, 2016 @ 05:19 PM
5pinDIN
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Total Posts:  10483
Joined  09-16-2010
status: Legend
nitugeorgian@gmail.com - 23 May 2016 09:09 AM

Is it possible I can get a service manual for the Xs series? I tried asking at our local yamaha service, but they could not help

Click here.

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Posted on: September 16, 2018 @ 04:11 AM
georgeitan
Total Posts:  1
Joined  09-16-2018
status: Newcomer

I experienced the same problem, but I decided to reset to manufacturing settings couple of times (ofcourse i lost all my edits :( ). But it solved the problem in my case.

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Posted on: October 22, 2018 @ 05:26 PM
jaedevin
Total Posts:  1
Joined  07-21-2015
status: Newcomer
nitugeorgian@gmail.com - 23 May 2016 02:28 AM

A few weeks ago, at a gig, after 10-15 minutes of playing, when changing between sounds, the keybord stopped working (I was playing notes, but no sound came out-the connection between the mixer and the keyboard was fine). I did a couple of slides, up and down the keys, it worked, I could hear every note, but when I immediatly played a chord, no sound.  I switched it off and on, no sound.
I went to the local yamaha service, after 15 min of normal playing, it did almost the same thing: this time all the C notes and F sharp notes across the keybord were not working(the other keys worked propperly this time), although it was more like a fading of the sound...when pressed reptedly, the same key sounded softer, or louder, or not at all; some notes had sustain on for 3-4 seconds(with no sustain aid form the pedal, or sound settings).
I was told it was a matter of contact strip replacement(all 76 of them), and that yamaha does not have on stock the specific contacts, and that they stopped making them for the XS series.
A second opinion(not yamaha staff) was that it’s a proccesor issue, and that the main processor would have to be replaced. Again, I was told that it was a job that only yamaha services can do.
Are any of these observations valid? is it the contacts? is it the processor? is it something else?
Thank you in advance

______________________________________________________________________________________________________________

Having the same problem on my motif xs6!  First the C’s and F sharps and then other keys went in and out intermittently. Cleaned it very well and it was a lil better but FAAAR from performance ready. Any news or luck on your baby? Good or Bad?  This is going to be an ordeal for me if its the mainboard. Hoping its just a lesser component such as the emks-fd or one of the MK boards.

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