Onkyo Dynamic Four 800 - Schematic for modification

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Dear all,

I am thinking about modifying my old 70s stereo amplifier, but I am lacking the schematic. Does anyone have schematics for the ONKYO Dynamic Four 800?

It is a cute 70s amplifier, but the gain of its line-in is not sufficient for iPods and similar devices.....

Thanks for you support :)

Kind regards,
Max
 
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