cvp85a
01-09-2006, 06:08 PM
Hi,
My CVP-85A Clavinova worked fine for about 10 years and then developed an intermittent fault. When the fault is present, the instrument is completely dead - no sound and not even any LEDs are alight. When the fault is not present everything works perfectly. During a period of several months, the intermittent fault appeared more and more frequently and now it is permanent.
I don't have a service manual for the instrument and so I've only been able to check that the internal fuses are OK and the +5v rail is normal.
There does not appear to be any official Yamaha service for these instruments where I live in Switzerland. I was given the name of an independent techie who said he will repair it for a fixed price of $500. He said that in his experience the fault is probably due to electrolytic capacitors which are leaking, the electrolyte causing corrosion of some of the printed circuit traces so that they eventually open circuit. But looking at the various PCBs in the Clavinova, I didn't spot any signs of such leakage or corrosion.
$500 is a very high price to pay to have some inexpensive capacitors replaced and some broken traces bridged, repairs that I could easily do myself. But in view of the absence of any visible corrosion, I have doubts that this is really the cause of the problem.
Does any other CVP-85A owner have experience of this to share?
Many thanks!
Bruce
My CVP-85A Clavinova worked fine for about 10 years and then developed an intermittent fault. When the fault is present, the instrument is completely dead - no sound and not even any LEDs are alight. When the fault is not present everything works perfectly. During a period of several months, the intermittent fault appeared more and more frequently and now it is permanent.
I don't have a service manual for the instrument and so I've only been able to check that the internal fuses are OK and the +5v rail is normal.
There does not appear to be any official Yamaha service for these instruments where I live in Switzerland. I was given the name of an independent techie who said he will repair it for a fixed price of $500. He said that in his experience the fault is probably due to electrolytic capacitors which are leaking, the electrolyte causing corrosion of some of the printed circuit traces so that they eventually open circuit. But looking at the various PCBs in the Clavinova, I didn't spot any signs of such leakage or corrosion.
$500 is a very high price to pay to have some inexpensive capacitors replaced and some broken traces bridged, repairs that I could easily do myself. But in view of the absence of any visible corrosion, I have doubts that this is really the cause of the problem.
Does any other CVP-85A owner have experience of this to share?
Many thanks!
Bruce