Yamaha cp25 key noise

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gearfixer: Junior Member; Posts: 154; Joined: Fri Feb 12, 2010 8:02 pm; Gear: ARP Pro DGX, Avatar, EX 800, RS101, VK-8M, Juno 60, 200a, Fast 5, and Rhodes MK1 stage 73.; Location: New Brunswick

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Post by gearfixer » Tue Feb 16, 2016 10:22 pm

Got a CP25 that the keys click when released. Your thoughts would be a great help thanks.

I've unsoldered power to the ch1 sound generator chip and the noise is gone. Looks like it may be the problem.

Swapped them and problem is the YM722 voice chip.