Pianotech

For those of you who regularly service disklaviers:

I recently have had what "appears" to be a problem with the key sensor cable connector causing the system to turn off. This is a brand new unit in a GB-1K. 

I had to remove the action to deal with tight key bushings. Upon reassembly the disklavier would not power up. Fiddling with the KS connector "appeared" to fix it, however upon installing the fallboard all went south. Further manipulation of the cable seemed to fix it (and yes, the cable was stored up in its little hangers as I found it).  Owner has now informed me that the problem is back. 

Has anyone encountered a similar situation? Or have suggestions or questions?

Peter Grey Piano Doctor 

Yamaha tech support: 714-522-9980

For those of you who regularly service disklaviers:

I recently have had what "appears" to be a problem with the key sensor cable connector causing the system to turn off. This is a brand new unit in a GB-1K. 

I had to remove the action to deal with tight key bushings. Upon reassembly the disklavier would not power up. Fiddling with the KS connector "appeared" to fix it, however upon installing the fallboard all went south. Further manipulation of the cable seemed to fix it (and yes, the cable was stored up in its little hangers as I found it).  Owner has now informed me that the problem is back. 

Has anyone encountered a similar situation? Or have suggestions or questions?

Peter Grey Piano Doctor 

For those of you who regularly service disklaviers:

I recently have had what "appears" to be a problem with the key sensor cable connector causing the system to turn off. This is a brand new unit in a GB-1K. 

I had to remove the action to deal with tight key bushings. Upon reassembly the disklavier would not power up. Fiddling with the KS connector "appeared" to fix it, however upon installing the fallboard all went south. Further manipulation of the cable seemed to fix it (and yes, the cable was stored up in its little hangers as I found it).  Owner has now informed me that the problem is back. 

Has anyone encountered a similar situation? Or have suggestions or questions?

Peter Grey Piano Doctor 

Once upon a time I was an electronic technician. These symptoms are associated with a broken cable or cable connector. Examine the cable wire at the junction of the connectors at either end. Even the slightest sign of external damage can mean that the internal wires have broken and connect intermittently.

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Carroll Arbogast
Piano Technician
CMA Piano Care, LLC
Needham, MA
(617) 283-0443

Original Message:
Sent: 11-24-2023 09:31
From: Peter Grey
Subject: Disklavier power issues

For those of you who regularly service disklaviers:

I recently have had what "appears" to be a problem with the key sensor cable connector causing the system to turn off. This is a brand new unit in a GB-1K. 

I had to remove the action to deal with tight key bushings. Upon reassembly the disklavier would not power up. Fiddling with the KS connector "appeared" to fix it, however upon installing the fallboard all went south. Further manipulation of the cable seemed to fix it (and yes, the cable was stored up in its little hangers as I found it).  Owner has now informed me that the problem is back. 

Has anyone encountered a similar situation? Or have suggestions or questions?

Peter Grey Piano Doctor 

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Peter Grey
Stratham NH
(603) 686-2395
pianodoctor57@gmail.com
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For those of you who regularly service disklaviers:

I recently have had what "appears" to be a problem with the key sensor cable connector causing the system to turn off. This is a brand new unit in a GB-1K. 

I had to remove the action to deal with tight key bushings. Upon reassembly the disklavier would not power up. Fiddling with the KS connector "appeared" to fix it, however upon installing the fallboard all went south. Further manipulation of the cable seemed to fix it (and yes, the cable was stored up in its little hangers as I found it).  Owner has now informed me that the problem is back. 

Has anyone encountered a similar situation? Or have suggestions or questions?

Peter Grey Piano Doctor 

Number 1 rule for a player is to power it up to make sure it is playing before doing anything. There could be an issue with the cable that goes down the lyre to the pedals causing a short. I have had to replace that cable on two disklaviers. 

For those of you who regularly service disklaviers:

I recently have had what "appears" to be a problem with the key sensor cable connector causing the system to turn off. This is a brand new unit in a GB-1K. 

I had to remove the action to deal with tight key bushings. Upon reassembly the disklavier would not power up. Fiddling with the KS connector "appeared" to fix it, however upon installing the fallboard all went south. Further manipulation of the cable seemed to fix it (and yes, the cable was stored up in its little hangers as I found it).  Owner has now informed me that the problem is back. 

Has anyone encountered a similar situation? Or have suggestions or questions?

Peter Grey Piano Doctor