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Yamaha AN1X - one key has always max velocity

Yamaha AN1X - one key has always max velocity

2009-08-01 by alan_probandt

There's a Yamaha AN1X keyboard on eBay which the seller claims has one key that always plays at max velocity regardless of how hard or soft it is pressed.  Does anyone have any thoughts about what could be causing this and what could fix it?
  As I understand, velocity on a keyboard is measured by having two switches.  One activates at the beginning of the keypress and the other activates at the completion of the keypress.  The velocity value is based on the time between the two switch activations.  If the bottom switch were broken to be never activated, it would appear that the player is taking infinite time to depress the note, and, I would guess, the velocity would be zero for this key.  It would never sound.
  If the bottom switch were always activated, pressing the key would appear to have zero time between the top switch activating and the bottom switch activating, giving instant keypress and max velocity.

  The Yamaha AN1X is a MIDI based late 1990s Analog Synth Modeller.  The opening bid is $200.  Does this seem like a reasonable buy according to the collective wisdom here?

Thank you.

RE: [vintagesynthrepair] Yamaha AN1X - one key has always max velocity

2009-08-01 by timothy kosiorek

In my experience in repairing this type of problem it is usually the switch contacts,they use rubber strips with about 1/2 to 1 octave of little carbon dots in two rows used for switches on them,one row is shorter than the other so there is a delay between them when making contact and usually the rubber breaks and one of the two switches does not make the correct contact,you have to replace the whole contact strip to repair it,the strips are really cheap to buy if they still have them in stock,less that $10.00,if you decide to get the unit and do the repair I'll tell you how to install the strip,theres a slight trick to it.buts its pretty easy to do.
Tim K.


direct link to my Bonanzle store.(lower prices)
direct link to my Ebay store.
http://www.sonicelectronicmusic.com




> To: vintagesynthrepair@yahoogroups.com
> From: alan_probandt@...
> Date: Sat, 1 Aug 2009 00:42:42 +0000
> Subject: [vintagesynthrepair] Yamaha AN1X - one key has always max velocity
>
> There's a Yamaha AN1X keyboard on eBay which the seller claims has one key that always plays at max velocity regardless of how hard or soft it is pressed. Does anyone have any thoughts about what could be causing this and what could fix it?
>; As I understand, velocity on a keyboard is measured by having two switches. One activates at the beginning of the keypress and the other activates at the completion of the keypress. The velocity value is based on the time between the two switch activations. If the bottom switch were broken to be never activated, it would appear that the player is taking infinite time to depress the note, and, I would guess, the velocity would be zero for this key. It would never sound.
> If the bottom switch were always activated, pressing the key would appear to have zero time between the top switch activating and the bottom switch activating, giving instant keypress and max velocity.
>
> The Yamaha AN1X is a MIDI based late 1990s Analog Synth Modeller. The opening bid is $200. Does this seem like a reasonable buy according to the collective wisdom here?
>
> Thank you.
>
>
>
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Re: [vintagesynthrepair] Yamaha AN1X - one key has always max velocity

2009-08-01 by Daniel Forro

In my opinion this can be caused by some dirtiness, dust or so, on  
PCB under the rubber switch. These switches are in stripes which can  
be easily removed to clean the PCB with isopropylalcohol. If the  
switch is broken, then key wouldn't play.

In these rubber switches usually there are two contacts, one is  
shorter, so it will make contact later.

So definitely I would buy it, repair is easy if you have some  
experience with it. That virtual analog synth has a lot of nice  
features, I liked it a lot when I had it.

Better keyboards with metal contact usually measure time between  
disconnecting one contact (starting position) and connecting the  
other one. It's more simple method mechanically - only one switch.

Best regards

Daniel Forro
Show quoted textHide quoted text
On 1 Aug 2009, at 9:42 AM, alan_probandt wrote:

> There's a Yamaha AN1X keyboard on eBay which the seller claims has  
> one key that always plays at max velocity regardless of how hard or  
> soft it is pressed.  Does anyone have any thoughts about what could  
> be causing this and what could fix it?
>   As I understand, velocity on a keyboard is measured by having two  
> switches.  One activates at the beginning of the keypress and the  
> other activates at the completion of the keypress.  The velocity  
> value is based on the time between the two switch activations.  If  
> the bottom switch were broken to be never activated, it would  
> appear that the player is taking infinite time to depress the note,  
> and, I would guess, the velocity would be zero for this key.  It  
> would never sound.
>   If the bottom switch were always activated, pressing the key  
> would appear to have zero time between the top switch activating  
> and the bottom switch activating, giving instant keypress and max  
> velocity.
>
>   The Yamaha AN1X is a MIDI based late 1990s Analog Synth  
> Modeller.  The opening bid is $200.  Does this seem like a  
> reasonable buy according to the collective wisdom here?
>
> Thank you.

RE: [vintagesynthrepair] Yamaha AN1X - one key has always max velocity

2009-08-01 by Brian Fuller

I agree on this I've done the same repair a couple of times myself. The last
one I did had a piece of cat/dog on it and once removed and cleaned with
some 90% alcohol all was well. I had an An1x and still wish I had it. It was
sounded killer!!! The software librarian available for it and all the free
patches on the net were great as well. GOOD LUCK!!!

  

 

From: vintagesynthrepair@yahoogroups.com
[mailto:vintagesynthrepair@yahoogroups.com] On Behalf Of Daniel Forro
Sent: Friday, July 31, 2009 11:23 PM
To: vintagesynthrepair@yahoogroups.com
Subject: Re: [vintagesynthrepair] Yamaha AN1X - one key has always max
velocity

 

  

In my opinion this can be caused by some dirtiness, dust or so, on 
PCB under the rubber switch. These switches are in stripes which can 
be easily removed to clean the PCB with isopropylalcohol. If the 
switch is broken, then key wouldn't play.

In these rubber switches usually there are two contacts, one is 
shorter, so it will make contact later.

So definitely I would buy it, repair is easy if you have some 
experience with it. That virtual analog synth has a lot of nice 
features, I liked it a lot when I had it.

Better keyboards with metal contact usually measure time between 
disconnecting one contact (starting position) and connecting the 
other one. It's more simple method mechanically - only one switch.

Best regards

Daniel Forro
Show quoted textHide quoted text
On 1 Aug 2009, at 9:42 AM, alan_probandt wrote:

> There's a Yamaha AN1X keyboard on eBay which the seller claims has 
> one key that always plays at max velocity regardless of how hard or 
> soft it is pressed. Does anyone have any thoughts about what could 
> be causing this and what could fix it?
> As I understand, velocity on a keyboard is measured by having two 
> switches. One activates at the beginning of the keypress and the 
> other activates at the completion of the keypress. The velocity 
> value is based on the time between the two switch activations. If 
> the bottom switch were broken to be never activated, it would 
> appear that the player is taking infinite time to depress the note, 
> and, I would guess, the velocity would be zero for this key. It 
> would never sound.
> If the bottom switch were always activated, pressing the key 
> would appear to have zero time between the top switch activating 
> and the bottom switch activating, giving instant keypress and max 
> velocity.
>
> The Yamaha AN1X is a MIDI based late 1990s Analog Synth 
> Modeller. The opening bid is $200. Does this seem like a 
> reasonable buy according to the collective wisdom here?
>
> Thank you.

Re: [vintagesynthrepair] Yamaha AN1X - one key has always max velocity

2009-08-02 by David Scarponi

I had a Kurzweil SP-76 with the same problem. A friend fixed it by removing a piece of dirt that was inside the keyboard.
Show quoted textHide quoted text

--- On Fri, 7/31/09, Daniel Forro wrote:

From: Daniel Forro
Subject: Re: [vintagesynthrepair] Yamaha AN1X - one key has always max velocity
To: vintagesynthrepair@yahoogroups.com
Date: Friday, July 31, 2009, 8:22 PM

In my opinion this can be caused by some dirtiness, dust or so, on
PCB under the rubber switch. These switches are in stripes which can
be easily removed to clean the PCB with isopropylalcohol. If the
switch is broken, then key wouldn't play.

In these rubber switches usually there are two contacts, one is
shorter, so it will make contact later.

So definitely I would buy it, repair is easy if you have some
experience with it. That virtual analog synth has a lot of nice
features, I liked it a lot when I had it.

Better keyboards with metal contact usually measure time between
disconnecting one contact (starting position) and connecting the
other one. It's more simple method mechanically - only one switch.

Best regards

Daniel Forro

On 1 Aug 2009, at 9:42 AM, alan_probandt wrote:

> There's a Yamaha AN1X keyboard on eBay which the seller claims has
> one key that always plays at max velocity regardless of how hard or
> soft it is pressed. Does anyone have any thoughts about what could
> be causing this and what could fix it?
> As I understand, velocity on a keyboard is measured by having two
> switches. One activates at the beginning of the keypress and the
> other activates at the completion of the keypress. The velocity
> value is based on the time between the two switch activations. If
> the bottom switch were broken to be never activated, it would
> appear that the player is taking infinite time to depress the note,
> and, I would guess, the velocity would be zero for this key. It
> would never sound.
> If the bottom switch were always activated, pressing the key
> would appear to have zero time between the top switch activating
> and the bottom switch activating, giving instant keypress and max
> velocity.
>
> The Yamaha AN1X is a MIDI based late 1990s Analog Synth
> Modeller. The opening bid is $200. Does this seem like a
> reasonable buy according to the collective wisdom here?
>
> Thank you.


Yamaha AN1X - one key has always max velocity

2009-08-02 by Mike de Vries

I had the same fault with a Emulator II.. took the keyboard apart, removed the rubber contacts (Washed them in warm soapy water and dried thoroughly) wiped the pcb down (No solvents, just a clean cloth).
Worked perfectly.
Regards
Mike

--- On Sun, 2/8/09, David Scarponi wrote:

From: David Scarponi
Subject: Re: [vintagesynthrepair] Yamaha AN1X - one key has always max velocity
To: vintagesynthrepair@yahoogroups.com
Received: Sunday, 2 August, 2009, 10:23 PM

I had a Kurzweil SP-76 with the same problem. A friend fixed it by removing a piece of dirt that was inside the keyboard.
Show quoted textHide quoted text

--- On Fri, 7/31/09, Daniel Forro wrote:

From: Daniel Forro
Subject: Re: [vintagesynthrepair ] Yamaha AN1X - one key has always max velocity
To: vintagesynthrepair@ yahoogroups. com
Date: Friday, July 31, 2009, 8:22 PM

In my opinion this can be caused by some dirtiness, dust or so, on
PCB under the rubber switch. These switches are in stripes which can
be easily removed to clean the PCB with isopropylalcohol. If the
switch is broken, then key wouldn't play.

In these rubber switches usually there are two contacts, one is
shorter, so it will make contact later.

So definitely I would buy it, repair is easy if you have some
experience with it. That virtual analog synth has a lot of nice
features, I liked it a lot when I had it.

Better keyboards with metal contact usually measure time between
disconnecting one contact (starting position) and connecting the
other one. It's more simple method mechanically - only one switch.

Best regards

Daniel Forro

On 1 Aug 2009, at 9:42 AM, alan_probandt wrote:

> There's a Yamaha AN1X keyboard on eBay which the seller claims has
> one key that always plays at max velocity regardless of how hard or
> soft it is pressed. Does anyone have any thoughts about what could
> be causing this and what could fix it?
> As I understand, velocity on a keyboard is measured by having two
> switches. One activates at the beginning of the keypress and the
> other activates at the completion of the keypress. The velocity
> value is based on the time between the two switch activations. If
> the bottom switch were broken to be never activated, it would
> appear that the player is taking infinite time to depress the note,
> and, I would guess, the velocity would be zero for this key. It
> would never sound.
> If the bottom switch were always activated, pressing the key
> would appear to have zero time between the top switch activating
> and the bottom switch activating, giving instant keypress and max
> velocity.
>
> The Yamaha AN1X is a MIDI based late 1990s Analog Synth
> Modeller. The opening bid is $200. Does this seem like a
> reasonable buy according to the collective wisdom here?
>
> Thank you.



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