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I own a Leader LBO-315 40MHz, that is not working and need a schematic to repair it.
I have the manual book, but not the circuit diagram, :-( :-(.
The switching power supply (84-240 VAC) area, for crt tube, I have saw the card T-3974B-P1, that R1 was burnt, Q1 ia C3503, just want to...
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