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Sony kv-xf25m30 trinitron clicks wont turn on

Sony kv-xf25m30 trinitron,
no picture or sound, constant clicking of relay and indicator light flashing once every second.

assuming power board is gone.
anything in particular on board??
should mention i'm an electronics engineer but have no diagnostic equip to test the circuit apart from multimeter, but can get caps/relays individually and replace.

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Yup sounds like a classic SMPS fault OK, probably the "Chopper" transistor? but could also be the controller, the best way is to get a new PSU, but check to see if PSU is OK without a "Load" if it is then it is NOT your PSU,and the fault is elsewhere and is shutting it down. Usually it is something drawing a lot of current.. often in the Horizontal section, but not always.. GL

Posted on Feb 01, 2010

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