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SONY STRDB900 AV receiver schematics


I was searching for the schematics of the smps from STRDB900, a 1U av receiver slim line from Sony.
D912 is shorted en series R R923 is burned (no colorcode anymore). Is is in the primary smps system. The gear is oscillating on and off. (display on and off etc)
Thank you ,
sincere greetings,