Сѓс…рµрјр° Сђрµс‚рѕрѕр° Сѓсѓсѓ 0707 May 2026

: It is dangerous to put hands in the water while an ultrasonic device is active, as it may damage small blood vessels (capillaries).

: The ultrasonic generator should never be switched on without the piezo-emitter submerged in water , as running it "dry" can destroy the circuit. : It is dangerous to put hands in

: The device typically utilizes a classical inductive three-point oscillator (inductive Hartley oscillator) to drive the piezoelectric element. : It is dangerous to put hands in

Repair enthusiasts and technical forums describe the internal circuitry of the Retona USU-0707 : It is dangerous to put hands in

: Often an unmarked NPN transistor. Common successful replacements include the , , or .

: A frequent point of failure; it is often replaced with a 12kΩ (0.125W) resistor during repairs. Diodes : Frequently used parts include the or .