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kevinaston1 · 6th Feb 2019, 7:55 pm

Hi Bill.

IC3 4 and 5 are on PCB PU40D2 which is slightly left of centre, next to the mains transformer.

If the popping noise is intermittent, GENTLE heat from a hair dryer should show it up quickly. Once the noise starts, a squirt of freezer will show up the culprit as the noise will instantly change or disappear.

Kevin

6th Feb 2019, 7:55 pm	#8
kevinaston1 Hexode Join Date: Aug 2014 Location: Featherstone, West Yorkshire, UK. Posts: 386	Re: Yamaha CLP411 Electronic Piano Hi Bill. IC3 4 and 5 are on PCB PU40D2 which is slightly left of centre, next to the mains transformer. If the popping noise is intermittent, GENTLE heat from a hair dryer should show it up quickly. Once the noise starts, a squirt of freezer will show up the culprit as the noise will instantly change or disappear. Kevin