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Marantz 2270

I am a long time retired broadcast engineer. I have a son-in-law who has a Marantz 2270 amplifier system. there is a problem with the speaker push push switch. I would like to fix this for him but I lack a schematic and a source of parts. Anybody got any suggestions for me?

Marantz 2270

I have a 2270 also and am looking for the same thing. Looked all over the place and can't find it. Good luck. If you come across any extras please let me know and I'll do the same. Thanks

Marantz 2270 service manual

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Marantz 2270

The Marantz 2270 service manual has been in the library since 2006 :)