NEC Surround AV-Receiver 850

Bernd K. (bk-tech) OP 2024-12-03 21:32 #7786160

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Hello I need a uC for the Funktion for my Surround Amp. See the Pictures!

Attached files:

RIMG0014.JPG (240 KB)
RIMG0014.JPG (240 KB)
RIMG0014.JPG (240 KB)
SM3.jpg (230 KB)

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Horst H. (linuxer) 2024-12-03 21:44 #7786167

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Hello, look at the goggle or ebay with "UPD75104CW"

best regards

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Jens G. (jensig) 2024-12-03 21:56 #7786176

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This is a mask programmable µC µPD75104CW, with ROM/program number 041. So you need to look for exactly this, if it should be able to work in your amp.

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Horst H. (linuxer) 2024-12-03 22:29 #7786190

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The same chip is installed in an NEC AV-350, which you can get relatively cheaply second-hand on the Internet. For example in Germany

https://www.kleinanzeigen.de/s-audio-hifi/nordrhein-westfalen/av-350/k0c172l928

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