Disklavier

HI
The dck500R module of my  MPX1 has a strange behaviour :

Intermittently (sometimes, not always? im not able to pinpoint any direct causes) the unit will power off for what seems just a split second so the "powering on" process starts again with the welcoming srceen message etc.

I have opened carefully the unit to see if there was not a loose part but everything looks pristine and perfect, also I went to have a look inside the piano to see if I ould detect any loose part or connectors (specially in the power unit area) but again there everything looks perfect.

At first I thought that it was happening only when the unit would be reading a diskette, but i have notice that it aslo happens sometimes if the unit is receiving midi data (from the computer) and also when the unit is just "on" without performing any tasks.

The power on/off button seeme sometime to be extra sensitive, just barely passing a finger over ou around it is enough to restart the unit again. 

So woulld it be the unit itself, the power unit in the piano or something else ? Does it ring any bells ?

-Thanks

ps: Im thinking of getting a DKC850, is it likely to happen there also ?

From just reading your message (admittedly a small amount of information on
the issues you see), it sounds like the power button itself may be the
issue.

  _____  

From: disklavier@yahoogroups.com [mailto:disklavier@yahoogroups.com] On
Behalf Of tintinlad320
Sent: Saturday, August 25, 2012 12:11 AM
To: disklavier@yahoogroups.com
Subject: [disklavier] DKC500R powering off


  

HI
The dck500R module of my MPX1 has a strange behaviour :

Intermittently (sometimes, not always? im not able to pinpoint any direct
causes) the unit will power off for what seems just a split second so the
"powering on" process starts again with the welcoming srceen message etc.

I have opened carefully the unit to see if there was not a loose part but
everything looks pristine and perfect, also I went to have a look inside the
piano to see if I ould detect any loose part or connectors (specially in the
power unit area) but again there everything looks perfect.

At first I thought that it was happening only when the unit would be reading
a diskette, but i have notice that it aslo happens sometimes if the unit is
receiving midi data (from the computer) and also when the unit is just "on"
without performing any tasks.

The power on/off button seeme sometime to be extra sensitive, just barely
passing a finger over ou around it is enough to restart the unit again. 

So woulld it be the unit itself, the power unit in the piano or something
else ? Does it ring any bells ?

-Thanks

ps: Im thinking of getting a DKC850, is it likely to happen there also ?

Yes maybe; when I had opened the unit i carefully looked ant check around for loose onnetore . Is there a way to check directly that power button ? 
his kind of problem is not happening all the time which makes it difficult I guess to analyse...
I should try to find a disklavier tech but I have the impression they are not to many around where I live (Nice, France). Ans in the case of a button problem the fix would be probably to send the unit for repair... are they repairing such unit still... not in Paris I guess ! 



--- In disklavier@yahoogroups.com, "Phil Becker" <phil@...> wrote:

>
> From just reading your message (admittedly a small amount of information on
> the issues you see), it sounds like the power button itself may be the
> issue.
> 
>   _____  
> 
> From: disklavier@yahoogroups.com [mailto:disklavier@yahoogroups.com] On
> Behalf Of tintinlad320
> Sent: Saturday, August 25, 2012 12:11 AM
> To: disklavier@yahoogroups.com
> Subject: [disklavier] DKC500R powering off
> 
> 
>   
> 
> HI
> The dck500R module of my MPX1 has a strange behaviour :
> 
> Intermittently (sometimes, not always? im not able to pinpoint any direct
> causes) the unit will power off for what seems just a split second so the
> "powering on" process starts again with the welcoming srceen message etc.
> 
> I have opened carefully the unit to see if there was not a loose part but
> everything looks pristine and perfect, also I went to have a look inside the
> piano to see if I ould detect any loose part or connectors (specially in the
> power unit area) but again there everything looks perfect.
> 
> At first I thought that it was happening only when the unit would be reading
> a diskette, but i have notice that it aslo happens sometimes if the unit is
> receiving midi data (from the computer) and also when the unit is just "on"
> without performing any tasks.
> 
> The power on/off button seeme sometime to be extra sensitive, just barely
> passing a finger over ou around it is enough to restart the unit again. 
> 
> So woulld it be the unit itself, the power unit in the piano or something
> else ? Does it ring any bells ?
> 
> -Thanks
> 
> ps: Im thinking of getting a DKC850, is it likely to happen there also ?
>

I'm basing this possible diagnosis on the fact that you indicate that the
on/off switch seems at times to be "very sensitive" to a light touch
powering off the unit when it is on, but not always.  This can indicate a
switch that has dirt in the mechanical mechanism that locks it from off to
on, or on the actual electrical contacts making it erratic in operation.
 
From my experience with other electronics, sometimes you can "fix" such a
problem by rapidly cycling the switch several times to dislodge dirt in the
mechanism.  Unplug the power first (electronics don't appreciate rapid power
cycling), then press the on/off switch as rapidly as you can while fully
pressing and releasing it rapidly several times in a few seconds. Press very
firmly (but do not strike or hit), as the goal is to fully cycle the switch
to vibrate the insides of the switch so as to dislodge any dirt which is
fouling the inner contacts or mechanical locking mechanism but you want to
avoid doing damage by physically "hitting" it to hard.  Your goal is to
rapidly cycle the insides of the switch without damaging things. 
 
Amazingly, this is often the problem with switches that have been around for
a while, and frequently ends the issues with them.  If not, and the switch
is the real problem, it will likely have to be replaced with a new
switch/button. As to such repairs, I have no knowledge what is available or
how to proceed with a DKC500R.

  _____  

From: disklavier@yahoogroups.com [mailto:disklavier@yahoogroups.com] On
Behalf Of tintinlad320
Sent: Sunday, August 26, 2012 7:50 AM
To: disklavier@yahoogroups.com
Subject: [disklavier] Re: DKC500R powering off


  

Yes maybe; when I had opened the unit i carefully looked ant check around
for loose onnetore . Is there a way to check directly that power button ? 
his kind of problem is not happening all the time which makes it difficult I
guess to analyse...
I should try to find a disklavier tech but I have the impression they are
not to many around where I live (Nice, France). Ans in the case of a button
problem the fix would be probably to send the unit for repair... are they
repairing such unit still... not in Paris I guess ! 

--- In disklavier@yahoogroups.com <mailto:disklavier%40yahoogroups.com> ,
"Phil Becker" <phil@...> wrote:
>
> From just reading your message (admittedly a small amount of information
on
> the issues you see), it sounds like the power button itself may be the
> issue.
> 
> _____ 
> 
> From: disklavier@yahoogroups.com <mailto:disklavier%40yahoogroups.com>
[mailto:disklavier@yahoogroups.com <mailto:disklavier%40yahoogroups.com> ]
On
> Behalf Of tintinlad320
> Sent: Saturday, August 25, 2012 12:11 AM
> To: disklavier@yahoogroups.com <mailto:disklavier%40yahoogroups.com> 
> Subject: [disklavier] DKC500R powering off
> 
> 
> 
> 
> HI
> The dck500R module of my MPX1 has a strange behaviour :
> 
> Intermittently (sometimes, not always? im not able to pinpoint any direct
> causes) the unit will power off for what seems just a split second so the
> "powering on" process starts again with the welcoming srceen message etc.
> 
> I have opened carefully the unit to see if there was not a loose part but
> everything looks pristine and perfect, also I went to have a look inside
the
> piano to see if I ould detect any loose part or connectors (specially in
the
> power unit area) but again there everything looks perfect.
> 
> At first I thought that it was happening only when the unit would be
reading
> a diskette, but i have notice that it aslo happens sometimes if the unit
is
> receiving midi data (from the computer) and also when the unit is just
"on"

> without performing any tasks.
> 
> The power on/off button seeme sometime to be extra sensitive, just barely
> passing a finger over ou around it is enough to restart the unit again. 
> 
> So woulld it be the unit itself, the power unit in the piano or something
> else ? Does it ring any bells ?
> 
> -Thanks
> 
> ps: Im thinking of getting a DKC850, is it likely to happen there also ?
>

THANK YOU !!!

For those suggestions, It worked ! The unit is now operating flawlessly ! Such a trouble Is it likely  to come back ? Since Im thinking may of selling it if I go for the DKC850. 

And by the way any idea if this unit (DKC500R) would work for replacement of with other disklavier models if I sell it. Also any idea of a fair price for such item...?

THanks again!

If it works fine now, it will probably last a long time before any problem
recurs. It really depends on whether it was dirt in the mechanism or also
wear and there's no good way to tell other than time.  It will also probably
respond to this "fix" a few more times as well if the issue recurs.

  _____  

From: disklavier@yahoogroups.com [mailto:disklavier@yahoogroups.com] On
Behalf Of tintinlad320
Sent: Tuesday, August 28, 2012 11:45 PM
To: disklavier@yahoogroups.com
Subject: [disklavier] Re: DKC500R powering off


  

THANK YOU !!!

For those suggestions, It worked ! The unit is now operating flawlessly !
Such a trouble Is it likely to come back ? Since Im thinking may of selling
it if I go for the DKC850. 

And by the way any idea if this unit (DKC500R) would work for replacement of
with other disklavier models if I sell it. Also any idea of a fair price for
such item...?

THanks again!