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Click here for the Master Parts Listing
http://www.jblproservice.com/pdf/LSR%20Series/LSR28P%20AMP%20BOM.pdf
Click here to view the JBL Professional Electronic
Failure QA Codes
http://www.jblproservice.com/protected/Domestic%20pdf/Electronic%20QA%20Codes.pdf
Click here for Schematics
http://www.jblproservice.com/pdf/LSR%20Series/LSR28P%20Schematics.pdf