Disklavier

It's a wonderful Christmas Eve,

FedEx arrived with a new power supply circuit board from Yamaha. (not the 
entire black box)   I didn't have to go to the dealer to borrow parts.  It took 3 
meticulous hours to disassemble and reassemble the black box... digitally 
macro photographing same and marking cables and plugs as I went to make sure I 
had the ability to reverse the process without error.  (The power supply is 
tucked way up and in the black box and the MIDI circuit board has to be removed in 
order to even get to the power supply)

I just powered up the piano and it works!  It's playing Silent Night as I 
type.  My wife is speechless as she thought I was going to blow up the piano 
after she saw all of the wiring harnesses hanging just 45 minutes ago.

One minor problem; when I power up the piano I get the message:

Sensor
Led On Error

When I push Play, the piano plays normally and the error message goes away.  
What does this error message mean?

Thanks again to the group members who helped me through this process.  I 
appreciate all of your input.

Merry Christmas and Happy New Year

Jim

I do not know if my memory is accurate but when I got my dkv about 6 
years ago the same or similar error message appeared. It turned out the 
cabling to the sensor was a little loose where it is plugged in. The 
tech unplugged and plugged the cable and the message went away.



pilotjim99@... wrote:

> It's a wonderful Christmas Eve,
>  
> FedEx arrived with a new power supply circuit board from Yamaha. (not 
> the entire black box)   I didn't have to go to the dealer to borrow 
> parts.  It took 3 meticulous hours to disassemble and reassemble the 
> black box... digitally macro photographing same and marking cables and 
> plugs as I went to make sure I had the ability to reverse the process 
> without error.  (The power supply is tucked way up and in the black 
> box and the MIDI circuit board has to be removed in order to even get 
> to the power supply)
>  
> I just powered up the piano and it works!  It's playing Silent Night 
> as I type.  My wife is speechless as she thought I was going to blow 
> up the piano after she saw all of the wiring harnesses hanging just 45 
> minutes ago.
>  
> One minor problem; when I power up the piano I get the message:
>  
> Sensor
> Led On Error
>  
> When I push Play, the piano plays normally and the error message goes 
> away.  What does this error message mean?
>  
> Thanks again to the group members who helped me through this process.  
> I appreciate all of your input.
>  
> Merry Christmas and Happy New Year
>  
> Jim
>

Well Done

Midi Magic


--- In disklavier@yahoogroups.com, pilotjim99@a... wrote:
> It's a wonderful Christmas Eve,
> 
> FedEx arrived with a new power supply circuit board from Yamaha. 
(not the 
> entire black box)   I didn't have to go to the dealer to borrow 
parts.  It took 3 
> meticulous hours to disassemble and reassemble the black box... 
digitally 
> macro photographing same and marking cables and plugs as I went to 
make sure I 
> had the ability to reverse the process without error.  (The power 
supply is 
> tucked way up and in the black box and the MIDI circuit board has 
to be removed in 
> order to even get to the power supply)
> 
> I just powered up the piano and it works!  It's playing Silent 
Night as I 
> type.  My wife is speechless as she thought I was going to blow up 
the piano 
> after she saw all of the wiring harnesses hanging just 45 minutes 
ago.
> 
> One minor problem; when I power up the piano I get the message:
> 
> Sensor
> Led On Error
> 
> When I push Play, the piano plays normally and the error message 
goes away.  
> What does this error message mean?
> 
> Thanks again to the group members who helped me through this 
process.  I 

> appreciate all of your input.
> 
> Merry Christmas and Happy New Year
> 
> Jim

Merry Christmas to all,

Where is the sensor itself located?  What does the sensor do?  I have 
retraced my steps and double checked every connection... to no avail.  I also just 
discovered that I the sound generator is not working.  Piano plays perfect, but 
no MIDI tones... hmm.  The green LED on the small control box on the left 
front of the piano does not light.  I can't recall if it ever lit, but the on-off 
button on that box does not do anything now.   I cannot toggle from live to 
digital piano either.

I had carefully macro photographed all of the circuit boards and connection 
points as I had disassembled the "black box" I have now re- scoured over every 
connection.  All look tight.  I had carefully removed each connector without 
stressing any wire or it's respective pinch point within a connector.  I have 
to make the assumption that it must be something I have done or not done... 2 
variables in one equation is pretty rare.  Only other thought is that as the 
power supply quit, it took out another board or circuit.
Where does the green LED referenced above get it's voltage from?  That 
probably will be about 2.5v and I'd love to know if there's a test point for that.  
I have a wild guess that the missing voltage is also the reason the MIDI 
generator does not work.

Thanks again for everybody's help.     Jim