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Hi and welcome to JustAnswer,Thank you for the question and your patience. Should you still need assistance for information purposes only...Initially, would a link to an electronic copy of the repair / Service Manual serve your need please?
Per site policy, Service Manuals are additional/Premium service. To comply with this, there would be a token 10USD.
Still, the Service Manual provides instructions (among others) for the Service Program that is inherently / built-in into the DN-S1000. The built-in diagnostics includes:
It also has exploded parts diagram to serve as reference when dis-assembly and assembling back: