Procedimiento de diseño de aplicadores microondas. Aplicadores

If one of the footswitch sockets (5) or (6) or the loudspeaker (10) is defective, the entire mod-ule complete with connecting cable must be replaced.

1. Open unit as described in section 6.1.

2. Remove front part as described in section 6.2 and controller board (71) as described in section 6.10. If required for better access to the defective module on the rear wall, remove power manager board (72) as well (see section 6.11).

3. Disconnect the cable of loudspeaker (10) from connector X8 located on the right at the front of the main board.

4. Using a size-7 socket wrench, remove the eight self-locking nuts that hold the main board to the housing bottom. Lift the board a little on the right side so the bunch of cables lo-cated underneath can be pulled out more easily.

5. Cut the cable fasteners holding the cables together, then disconnect the connecting cable of the defective module and dismount the latter from the rear wall. In the case of the small footswitch socket of HW00 and HW01, you need a special tool to do this. However, the threaded ring that holds the socket in place (sometimes two rings were used, one on top of the other) can also be removed with a normal screwdriver – just insert the blade into one of the slots and – instead of rotating the screwdriver – apply counterclockwise tangential pressure to the ring. Spare parts feature a hex nut which is easier to mount. As from hard-ware status 02, the loudspeaker comes mounted on M3 threaded bolts with insulating nip-ples.

6. Install the new module on the rear wall. In the case of the small footswitch socket, place the part into the mounting hole, pull the cable through the hex nut and screw nut in place on the socket. Be sure to meet the plastic fine pitch thread correctly (no jamming!) and do not tighten too much. Take the connecting cable to the right and combine it with the two other cables. Install the loudspeaker in the same way as you removed it.

7. Lift the main board a little on its right, place the cables underneath it and lay them out be-hind the stay-bolts in such a way that they can be easily routed upwards, without getting

squeezed, through the cutout provided in the right edge of the board. If available, use a cable fastener to bind the cables together. Reinstall the main board with the eight self-locking nuts.

8. If applicable, reinstall the power manager board (72) as described in section 6.11.

9. Reinstall front part as described in section 6.2 and controller board (71) as described in section 6.10.

10. Reconnect the power cord and check that unit is operational, then disconnect mains cable again.

11. Close the unit as described in section 6.1, then perform functional check and safety checks.

6.16 Replacing the Power Supply Socket, the Serial Interface Unit or the Argon Beamer Connector

The power supply socket (3), the serial interface unit (8) and – in units with HW status 01 or higher – the connecting socket for the maxium^® Beamer (7) are all located on the rear panel of the unit and can be replaced without any need to remove the main board.

1. Open unit as described in section 6.1.

2. If better access to the defective part is needed, remove power manager board (72) as well (see section 6.11).

3. If you need to replace the power supply socket (3), disconnect the main-board connecting cable (15) and the protective conductor (PE). Remove the two fixing nuts, then remove the socket inwards. When installing the new socket, do not forget to transfer the fuse holder (4) from the old part to the new one.

4. If you need to replace the serial interface unit (8), remove the four nuts and withdraw the unit inwards. When installing the new unit, ensure that the male DSUB9 socket is located on the left (towards the power supply socket) and the female DSUB9 socket is located on the right (footswitch socket side).

5. If you need to replace the Argon Beamer connecting socket (7), begin by disconnecting the cables from connectors X2 and X21 on the main board. With HW01 units, this socket is still mounted by way of a threaded ring (sometimes even two rings are used, one on top of the other). A special tool is usually needed to remove the threaded ring(s). However, you can also use a normal screwdriver. Just insert the blade into one of the slots and – instead of rotating the screwdriver – apply counterclockwise tangential pressure to the ring. Spare parts are provided with a hex nut which is easier to mount. Insert the new component into the opening from the outside, then guide the two connectors and the PE terminal through the nut and screw nut in place on the socket, taking care to introduce the plastic fine thread correctly (no jamming). Do not overtighten! Fix PE conductor cable in place on the rear wall, then reconnect the two cable plugs to X2 and X21 on the main board.

7 Technical Description of the ME402 with MB402 Option

7.1 General Information

The Martin ME402 maxium^® is a universally applicable high-frequency (HF) surgical unit satis-fying all requirements of clinical users as well as specialized private practitioners. As an acces-sory, the Argon Beamer MB402 is available, which has been specially optimized for use with the ME402 maxium^® and is completely controlled via the latter. Both units and the gas cylinder can be conveniently installed on the maxium^® Cart, a special equipment trolley.

Compared with its predecessors, the ME402 has been upgraded with a range of new features, especially the following:

• Wide-range power supply unit for supply voltages of 100 VAC to 240 VAC, 50 Hz to 60 Hz.

• Operation through an 8.4-inch TFT color screen with background illumination (provided by 2 fluorescent tubes).

• Selection of numerical values via rotary switch with axial switching function and channel selector buttons.

• Novel operating concept taking ergonomic aspects into account.

• Two equivalent monopolar HF outputs that can be activated either by finger switches (pushbuttons) on the electrode handle or by a freely assignable footswitches.

• Neutral electrode monitoring with on-screen indicators.

• Two bipolar HF outputs – one activated with a freely assignable footswitch or by imped-ance-dependent automatic control; the second activated with a freely assignable foots-witch, or by impedance-dependent automatic control, or with the instrument’s finger switches. This second output features an instrument recognition function as well. From HW02, it also allows connecting two different instruments – for bipolar cutting and bipolar coagulation – which can be activated separately.

• Exchangeable socket modules for connection of KLS Martin accessories and US-specific ac-cessories. Besides, an extra version is available for connecting Erbe acac-cessories.

• Up to 100 settings can be stored as user-specific application programs.

• The Argon Beamer MB402 (available as an accessory) is completely powered, controlled and activated through the ME402.

• Serial CAN interface for making the ME402 part of an integrated OR system, as well as for communication with other medical equipment.

• RS232 serial interface for convenient software updating directly from your PC, for transfer-ring settings and for other servicing purposes.