: A frequent point of failure; it is often replaced with a 12kΩ (0.125W) resistor during repairs. Diodes : Frequently used parts include the or .
: A red LED (HL1) protected by a diode (VD1) indicates the generator is operational. Operational Highlights Efficiency : The : A frequent point of failure; it is
: It is dangerous to put hands in the water while an ultrasonic device is active, as it may damage small blood vessels (capillaries). : A frequent point of failure