3.1.4 Displays & Drivers
The seven segment displays, LED 11 and LED 12, and the individual LEDs,
LED1 through LED8, are driven by display drivers chips IC5 and IC6. These 35
segment drivers and controlled by serial information sent from the
microprocessor to their CK and DATA pins. The display intensity is determined
by R11 and R17. capacitors C25 and C28 provide filtering and voltage
stabilisation.
3.2 ULTRASONIC TREATMENT APPLICATOR/S
(see Schematic page 12)
The ultrasonic treatment applicator consists of a plastic and aluminium assembly
with the ultrasonic transducer bonded in position. The contact loss
indicator LED is driven by the LED signal from the contact sense circuit on the
main PCB. The LED has a capacitor connected in parallel with it to prevent the
transducer drive RF from turning it on.
The piezoelectric resonator which generates the ultrasound energy is
permanently bonded to the cap of the applicator. It can be replaced by simply
unscrewing the cup and resonator and attaching a new cup and resonator.
The connector of the treatment applicator contains a small printed circuit board
which houses IC1 and filter capacitor C1. IC1 is an EEPROM which is
programmed during the calibration sequence, see page 8, and stores the critical
information relating to optimum tune frequency and supply voltage levels for
each output setting necessary to maintain calibration.
This symbol indicates that the applied parts (treatment
applicators) of this equipment are rated as Type “BF”. This
means that the patient applied parts are suitable for
placement on the external surface of the patient without
creating a safety hazard.
Metron Accusonic Plus
__________________________________________________________________
Version 1.6 March 2002 Page 7 of 12
To Next Page
Loading...