Multifunctional microwave therapy instrument works and troubleshooting

Microwave multi-function treatment instrument use microwave radiation heating treatment, can achieve sterilization, and activating the role such as; the use of microwave in direct contact with focus enables the Organization to focus part of high temperature and solidification and cause vasoconstriction closed for therapeutic purposes.

Microwave multi-function treatment instrument equipped with different treatment for head, you can implement different treatment targets, which in anorectal branch, Gynecology, urology, ENT, dentistry, dermatology, Medical Department has a wide range of applications.

Microwave multi-function treatment instrument of many varieties are chooses wdz-c type.

Wdz-microwave multi-function treatment instrument of core circuit simple compact mainly consists of four parts.

1. microwave generator section.

Microwave generation by the magnetron, when its filament voltage (about 4.5V) and make it work under high pressure (about 1500V) have, that produces microwave magnetron. These two sets of voltage requirements for precision is not very high, by two transformer supplies.

2. power control section.

This part of the circuit is not complicated by an oscillation circuit with SCR (800V, 16A) to control the supply of high-voltage step-up transformer magnetron primary AC 220V's breakover angle to control the power output of a magnetron.

Third, time control section, this section contains two time control: preheating time control, time control.

1. Preheat time control circuit: warm-up time is about 3 ~ 5 minutes, control circuit consists of a "555" timebase circuit, through a triode 3DG130 control supply-voltage step-up transformer of magnetron primary side of 1st 6V relay to warm-up time without high pressure that is non-microwave output;

2. working time control from 0 ~ 99 minutes, reaching the alert after the scheduled time, manually RESET reset, this circuit integration time controller TIMER-JSS48A to complete

IV. other circuits, power adjust, power limit control, lifestyle, and power display parts.

1. power adjustment circuit includes a number of Rotary potentiometers and a Schmitt trigger 74LS74 composition changes through the potentiometer to control the Schmitt trigger oscillation output frequency to control to trigger the SCR BT33 final;

2, power limit control circuits, power limit signal taken from operational amplifier HA17324.

When continuous work manner, to the maximum output power: 150W, upper circuit through a triode 3DG130 triggered supply magnetron hypertension side step-up transformer primary second 6V relays to meet power Super no microwave output purposes. You must manually RESET Reset

3. working mode control by an micromove switch to select continuous or with foot pedal control work.

4. power display section of ± 5V power supply block by a pair of voltage: 7805, 7905 supply, circuit parts mainly by manifold LM34075.

5. microwave multi-function treatment instrument maintenance methods and considerations

(A), testing microwave output cord is short circuit or open circuit;

(Ii), testing microwave tube: find a wet soap, will output header inserted above, turn on automatic or manual to magnetron with filament voltage warming, crossed the control part to magnetron with normal-pressure, if, in the SOAP should be clearly heard the sound of burning;

(3), other control circuit is simple, you can reference the previous introduction to maintenance;

(4), notes: overhaul process, not the output is part of the near and alignment of the eyes or testes (no child left alone) is a good idea to make the output head on small tiehe, microwave output lines do not easily broken.

If the above method to do that you'll be able to fix it get, but considerations must not forget, do not outweigh the yo!