Dear List, I am going to replace a set of keys in a Yamaha C7 in a couple of weeks. This is Yamaha's preferred method of replacing the first generation of Ivorite keytops that have yellowed. My request is for any advice on what I will run into in this procedure as it is my first. My likely order of work will be: #1 Take a lot of measurements of original keys and action such key height, dip, height of key lifter felts, blow distance, checking distance etc. and record them #2 Remove stack and install new keys #1 & #88 and reinstall stack. Check for major changes in key height, damper lift etc.. #3 Remove stack again and keys. Clean and polish keypins #4 Install keys, easing etc. #5 Rough regulate hammer shanks off rest rail if this has changed #6 Fine regulate key level to specs taken #7 Rough regulate blow distance and backchecks #8 Rough regulate dip #9 Fine regulate damper lift with key and pedal #10 Go through and fine regulate action Question? I don't think this will effect most regulation other than dip, key height, backchecks and damper lift. Is this right? Question? How long has this taken other technicians who have replaced a Yamaha keyboard? I'm figuring 5 to 6 hours... ilvey, RPT Pacifica, CA
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