Chosen Solution
I have a Kawai CS9 digital piano which would not power on yesterday. This was due to a blown internal fuse on the power board. I have replaced this fuse and the piano now plays fine, but unfortunately it will now not turn off! After pressing the power button to switch the piano off, all I can hear is a loud low buzzing noise and the power light remains on. I have to turn it off at the mains to turn it off. Any ideas?
Hi @jamesrdixon There’s always a reason why a fuse blows so whatever caused it to happen may have damaged something else as well or it got damaged in the process. Vague answer I know but without the schematic it would be hard to find out without testing each component individually, unless there’s obvious visible component damage on the board. I couldn’t find a free download online but here’s a link to the service manual that may help. Service manuals usually have schematic diagrams and a parts list. If you’re lucky it may also have troubleshooting flowcharts as well. Given the cost of the manual it may save a lot of time by getting it.
