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My Yamaha Remote control for RAV254 WE45870US stopped working and when I opened the case I noticed a component missing from the PCB. I require a schematic diagram to identify the missing component please. Regards Alf

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It isn't uncommon to see an empty spot on a PCB since they are often designed to accept additional integrated circuits to accommodate more complex functions and/or future updates. On PCBs for larger devices such as TVs, there are almost always other parts 'missing' for the same reason. The chance that a component has just gone missing is non-existent.
To check if any IR remote is at least putting out some kind of code train, you can use any digital camera or camcorder, hold the lens end of the remote towards the camera lens and 'take a picture' while holding down any button on the remote. If the remote is outputting IR signals, you will see this on the resultant digital 'photo' as white spot or spots.

Posted on Mar 24, 2011


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