B1 is measured mains voltage power 66V (normal should be 132V), when disconnecting the line pipe access 100W/220V bulb dummy load voltage is only measured B1 2V, illustrate the power load ability, related components are measured with a multimeter is good, a few each substitution power transistor, the feedback capacitor is invalid, after disconnecting the regulator found that amplification V612 (2SC3807) base capacitance C615 (0.015UF) boot, that the output voltage is not, use the table measuring capacitance

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