Hi Gerald, I’m Louie. Sorry you had to wait awhile but I’ll do my best to help.Initially, I checked with my regular source and their site posted availability of a service manual for this model including the schematics for a fee.
Would a LINK to this page serve your need please?
Sorry but that information can only be provided by the seller.
I am only able to reply to the "...How can I find service manual with schematic?..." by providing a LINK to the seller's page.