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Sansui SX900 no sound. all indicators normal, except no change in level display. suspect audio amp, cannot find data 2 Identify components. just don’t know where 2 start

Hi @brucemeister , Here is a link to the service manual for your receiver. To download the file: When the sentence directly below the Document preview box changes from This file is downloadable free of charge: …processing… to This file is downloadable free of charge: Get Manual, click on the Get Manual, as this is the download link. Be patient, it takes a little while to find the file. Like all good service manuals it has full schematics, board layouts, block diagrams and parts list. Hopefully this is of some help.