Megadyne Mega Power
Megadyne · Model Mega Power
Simple on the outside. Advanced on the inside. [b]The future of electrosurgery (diathermy) is here today[/b] The intuitive design and user-friendly set-up of the Mega Power Electrosurgical Generator (diathermy) allows your surgical team to hit the ground running. The confusion and frustration associated with previous generators are a thing of the past. Surgical teams have been asking for a generator that is simple, intuitive to use, and easy to set-up. The Mega Power is the answer with simple but elegant features that include: [list] [*] Large, easy to read displays. Highly visible, even at a distance. [*] Recall feature readily recalls previous power settings and modes on set-up. [*] Quick scroll feature allows for fast and accurate power setting adjustments. [*] Power switch is easily accessible on front panel of generator. [*] Highly visible return electrode warning light. [*] 6 clearly labeled and easily selectable mode settings. [/list]
Key tips
- ·Never defeat or bypass a return-electrode monitoring (REM) alarm to finish a case - it's a direct burn risk.
- ·Verify OR table battery backup - a table that loses power mid-procedure is a real, documented incident type.
- ·Track surgical light lamp-hours rather than waiting for failure - a sudden failure mid-case is avoidable.
Typical Failure Modes
Compiled for this model from its own documentation and established engineering knowledge for this equipment class - not from a verified service record. Confirm against the manufacturer's service manual.
No or low RF output / high-impedance cut-out
HighSymptoms: No cut / coag effect, "high impedance" or output-error message, output shuts down.
Root cause: Poor electrode contact or a dry field, a damaged handpiece / cable, a return-electrode (REM/NESSY) fault, or an output-stage fault.
Return-electrode (patient-plate) contact-quality alarm
MediumSymptoms: REM / NESSY / plate alarm, monopolar output inhibited.
Root cause: Poorly applied or dried split dispersive pad, a pad-cable fault, or the contact-quality-monitor circuit.
Bipolar / vessel-sealing output fault
MediumSymptoms: Bipolar or sealing output weak, seal cycle will not complete, instrument not recognised.
Root cause: Bipolar cable / instrument fault or the sealing output stage.
Fails calibration / output drifts after a repair
MediumSymptoms: Output power or the REM circuit outside tolerance on the analyser.
Root cause: Output board or REM circuit needs recalibration - anti-static handling required.
Footswitch / handswitch fault
MediumSymptoms: Output will not activate from the pedal or the handpiece.
Root cause: Footswitch or handswitch / cable fault.
Touchscreen / display / boot fault
LowSymptoms: Unresponsive touchscreen, will not power on or boot, fan / thermal alarm.
Root cause: Display, power supply, control board, or a cooling-fan fault.
Serviceable Parts & Consumables
Serviceable items for this model, compiled from its documentation and engineering knowledge for this equipment class. Service class and relative cost are estimates, not manufacturer figures; no part numbers are given. Confirm intervals and pricing against the manufacturer.
Reusable instrument / handpiece cables
Class Periodic replacementRel. cost $$R&R Easy
Split dispersive (return) pads
Class ConsumableRel. cost $R&R Easy
Footswitch
Class Periodic replacementRel. cost $$R&R Fairly easy
Bipolar / sealing cable
Class Periodic replacementRel. cost $$R&R Easy
RF output board
Recalibration required after replacement; anti-static handling.
Class Major service partRel. cost $$$$R&R Difficult
Cooling fan
Class Major service partRel. cost $R&R Moderate
| Part | Service class | Relative cost | R&R difficulty |
|---|---|---|---|
| Reusable instrument / handpiece cables | Periodic replacement | $$ | Easy |
| Split dispersive (return) pads | Consumable | $ | Easy |
| Footswitch | Periodic replacement | $$ | Fairly easy |
| Bipolar / sealing cable | Periodic replacement | $$ | Easy |
| RF output board Recalibration required after replacement; anti-static handling. | Major service part | $$$$ | Difficult |
| Cooling fan | Major service part | $ | Moderate |
Relative cost: $ lowest · $$$$ highest service-part cost for this equipment class. Not a price.
PM Checklist
Preventive-maintenance tasks typical of this equipment class. Perform to the manufacturer's procedure and your facility's policy - this is general reference, not a schedule for this specific unit.
- ·Pre-case functional check
- ·Electrosurgical return-electrode cable inspection
- ·Table hydraulic / mechanical inspection
- ·Annual electrical safety test and full PM
Error Codes
Extracted directly from this unit's own service manual.
201Internal communications between internal micro controllers has failed.
202Internal Watchdog microcontroller has detected an error and has shut the system down for safety reasons.
203The Master microcontroller has detected an excessive amount of power consumption compared with the RF output power being delivered.
204One or more relays have failed the relay diagnostic test.
205One or more of the foot switches or hand switches were in the active state during power up.
206An error was detected in the CQM Network during the Power On Self Test (POST).
207A button press was detected during POST, this condition is not permitted.
208An error was detected in the B+ Voltage sense network during Power On Self Test (POST).
209The internal power supply has reached an overload condition and has shutdown. The unit may be reset by turning off the power if the overload condition has cleared, such as an over temperature condition.
210The Master Microcontroller reads the calibration constants and the checksum from EEPROM. If the values do not match an error is displayed.
211The Watchdog has detected a CQM Error.
212The WD has detected an error in the CQM Network during the Power On Self Test (POST).
213The Watchdog Microcontroller has detected an excessive amount of power consumption compared with the RF output power being delivered.
214The Watchdog has detected the inappropriate activation of the Primary Relay.
215The Watchdog Microcontroller has detected inappropriate activation of the MP1 Relay.
216The Watchdog Microcontroller has detected inappropriate activation of the MP2 Relay.
217The Watchdog Microcontroller detected a failure of the Secondary Relay.
218The Watchdog Microcontroller has detected the incorrect output waveform.
219The Watchdog Microcontroller has detected the incorrect power setting on the HVPS.
220An error was detected in the I+ current sense network during Power On Self Test (POST).
221An error was detected in the voltage sense network (VSV) during Power On Self Test (POST).
222The analog signal levels are above the specified levels during an idle state condition.
223The Watchdog Microcontroller detected an error in the Primary Relay.
224The Watchdog Microcontroller detected an error in the MP1 Relay.
225The Watchdog Microcontroller detected an error in the MP2 Relay.
226The Watchdog Microcontroller detected an error in the Secondary Relay.
227The Master Microcontroller detected an error in the Primary Relay.
228The Master Microcontroller detected an error in the MP1 Relay.
229The Master Microcontroller detected an error in the MP2 Relay.
230The Master Microcontroller detected an error in the Secondary Relay.
Troubleshooting Approach
A starting sequence for this model, compiled from its documentation and engineering knowledge for this equipment class. Follow the manufacturer's service documentation for the actual procedure.
Symptom: No or low RF output / high-impedance cut-out
- Confirm good electrode-tissue contact and an adequately wetted field.
- Inspect the handpiece / instrument and its cable for damage; substitute a known-good one.
- Check the split dispersive (return) pad is well applied over well-perfused muscle with a sound cable.
- Verify output into a resistive test load with an electrosurgical analyser.
- Replace the RF output board and recalibrate on a non-conductive surface if output is confirmed absent (anti-static handling).
Symptom: Return-electrode (REM / NESSY / CQM) contact-quality alarm
- Re-apply a fresh split dispersive pad with full skin contact.
- Check the pad cable and its connector.
- Try a known-good pad.
- Run the contact-quality-monitor calibration with a good pad fitted.
- Refer the CQM circuit if it still alarms.
Symptom: Output will not activate from the footswitch or handswitch
- Test the other activation method to isolate the pedal from the handpiece.
- Inspect the footswitch and its cable / connector for damage or moisture.
- Check the handswitch leads on the handpiece.
- Substitute a known-good footswitch.
- Refer the activation input board if both methods fail.
Symptom: Fails calibration / output drifts after a repair
- Verify cut and coag output at several settings into a test load with an analyser.
- Verify the REM / CQM circuit against its spec.
- Recalibrate per the service manual on a non-conductive bench with anti-static precautions.
- Check the cooling fan and thermal path.
- Re-verify all outputs and the REM alarm before returning to service.
Typical Location
Where this class of equipment is typically deployed - general reference, not this unit's own placement record.
- Operating rooms
- Procedure rooms
- Interventional suites
Documents & Manuals
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