Dimmer desk lamp broken, how to repair it?
If there is no bad, check whether other components are not bad, the common fault is the capacitor C2, C3 breakdown, resistance burned, as long as the damaged components change, the fault can be ruled out.
The lamp plugged, dimming knob to the middle position, with a multimeter voltage AC voltage measurement of thyristor T1, T2 between the two, if the voltage is 220V, indicating no SCR conduction, power down detection of welding quality further;
If you can't fix the lamp, you should check that the bulb, plug and wire are all normal;
