The lighting light is not bright
Check the voltage at both ends of the BCR two -way gates tube T1 and T2.BCR is easy to damage components.If there is no fault check capacitor C2, C3, resistance, etc.
Maximum brightness cannot be dimmed
Check whether the two -way crystal tube is normal, whether the potentiometer is short -connected, and the two -way trigger the diode to break through
Lighting switch fault maintenance