Pianotech

  • 1.  Disklavier power issues

    Registered Piano Technician
    Posted 11-24-2023 09:31

    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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  • 2.  RE: Disklavier power issues

    Registered Piano Technician
    Posted 11-24-2023 13:11

    Yamaha tech support: 714-522-9980



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    Geoff Sykes, RPT
    Los Angeles CA
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  • 3.  RE: Disklavier power issues

    Registered Piano Technician
    Posted 11-24-2023 18:44

    Geoff,

    I talked with them while I was at the piano. Unfortunately they were of little help. He wanted to send me the manual for me to read and figure it out myself. He claimed it was hard to visualize without being there.  He did explain the importance of having a complete connection through all cables though. This is what leads me to think there is a problem with the cable itself.  

    I have referred them to the dealer they purchased it from for warranty work.  I was "hoping" someone might have seen this and could advise. 

    Peter Grey Piano Doctor 



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    Peter Grey
    Stratham NH
    (603) 686-2395
    pianodoctor57@gmail.com
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    Original Message


  • 4.  RE: Disklavier power issues

    Posted 11-25-2023 22:48

    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
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  • 5.  RE: Disklavier power issues

    Registered Piano Technician
    Posted 11-26-2023 17:13

    Carroll,

    Yes, thank you. I wondered that myself. Can't tell from the outside, but I can easily imagine one of the 7 internal "connection thingies" could similarly be responsible.  

    Peter Grey Piano Doctor 



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    Peter Grey
    Stratham NH
    (603) 686-2395
    pianodoctor57@gmail.com
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    Original Message


  • 6.  RE: Disklavier power issues

    Member
    Posted 11-27-2023 10:57

    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. 



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    James Kelly
    Owner- Fur Elise Piano Service
    Pawleys Island SC
    (843) 325-4357
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  • 7.  RE: Disklavier power issues

    Registered Piano Technician
    Posted 11-27-2023 20:57

    James,

    How does one diagnose something like that? 

    Peter Grey Piano Doctor 



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    Peter Grey
    Stratham NH
    (603) 686-2395
    pianodoctor57@gmail.com
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    Original Message