Mindray EX 65 User manual

Disassembling Guide for

Ex-55/65

International Customer Service Department

Mindray CO. Ltd.

2008.09 (Ver 1.1)

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Content

Warning........................................................................................................................- 3 -

Note..............................................................................................................................- 3 -

1 Tools..........................................................................................................................- 4 -

2 Preparations for Disassembly.................................................................................- 4 -

3 Circuit System Disassembly...................................................................................- 6 -

3.1 Remove the Top Panel............................................................................................- 6 -

3.2 Remove the CPU board..........................................................................................- 7 -

3.3 Remove the Button Board ...................................................................................... - 8 -

3.4 Remove the Monitor Board....................................................................................- 8 -

3.5 Remove the Net Board...........................................................................................- 9 -

3.6 Remove the CIS interface board............................................................................- 9 -

3.7 Remove the Built-in Batteries..............................................................................- 10 -

3.8 Remove the Speaker............................................................................................. - 11 -

3.9 Remove the Three-way Valve .............................................................................. - 11 -

3.10 Remove the Power Board...................................................................................- 12 -

4 Pneumatic System Disassembly ..........................................................................- 14 -

4.1 Remove the Upper Rear Panel............................................................................. - 14 -

4.2 Remove the Front Panel.......................................................................................- 15 -

4.3 Remove the Display Assembly ............................................................................- 15 -

4.4 Remove the High Voltage Inverter.......................................................................- 17 -

4.5 Remove the System Switch..................................................................................- 17 -

4.6 Remove the Flow Meter control board. ............................................................... - 18 -

4.7 Remove the Alarm Light......................................................................................- 19 -

4.8 Remove the Encoder Board ................................................................................. - 20 -

4.9 Remove the O2 Flush Button...............................................................................- 20 -

4.10 Remove the Pipeline or Cylinder Pressure Gauges............................................- 21 -

4.11 Remove the Flow Meter.....................................................................................- 22 -

4.12 Remove the Needle Valves.................................................................................- 22 -

4.13 Remove the Module Socket Communication Board (NIOS).............................- 23 -

4.14 Remove the Pipeline Gas Supply Inlet Assembly..............................................- 23 -

4.15 Disassemble the Pipeline Gas Supply Inlet Assembly....................................... - 24 -

4.16 Remove the ACGO Switch ................................................................................- 25 -

4.17 Remove the Breathing Valve Assembly............................................................. - 25 -

4.18 Remove the O2-N2O block valve......................................................................- 26 -

5 Electrical and Pneumatic Diagrams .....................................................................- 27 -

5.1 Electrical Connections .........................................................................................- 27 -

5.2 Pneumatic Connections........................................................................................ - 28 -

5.3 Modular Connections...........................................................................................- 29 -

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Warning

To help prevent fires, only use lubricants approved for anesthesia or O2 equipment.
Do not use lubricants that contain oil or grease. They burn or explode in high O2
concentrations.
Obey infection control and safety procedures. Used equipment may contain blood and
body fluids.
Movable parts and removable components may present a pinch or a crush hazard. Use
care when moving or replacing system parts and components.
Use care when disassembling the parts with sharp edges to avoid cuts.
Pay attention to the screws during the disassembly to prevent screws from falling into the
inside of the equipment. Failure to do so may cause short circuit.
Make sure to bleed gas pressure before disassembling pneumatic fittings to avoid
personal injury caused by high pressure gas.

Note

When re-assembling, inspect all parts for deterioration. Replace them if necessary. Use
appropriate screws and parts.
After repairs are completed or parts replaced, you are required to perform the checkout
procedure. Please refer to Service Manual PART 4 “Checkout and Test”.

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1 Tools

During disassembling and replacing, the following tools may be required:
Inner hexagon wrench
Electric screwdriver
Diagonal pliers
Flathead screwdriver
Drawer spacing fixer
M4 sleeve screwdriver
Flow meter positioning fixture
Adjustable wrench
Tweezers

2 Preparations for Disassembly

Before disassembly,

1. Make sure:

The anesthesia machine is stopped.
Bleed the gas pressure from the anesthesia machine as described below.
Disconnect the AC power supply.
Disconnect all pipeline and cylinder gas supplies.
Prepare the tools required for disassembly.
Maneuver the anesthesia machine to an appropriate location and then step the four caster
brakes to fix the machine.

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2. Bleeding Gas Pressure

Make sure to bleed the gas pressure from the anesthesia machine before disassembling
pneumatic fittings to avoid personal injury or equipment damage. Bleed gas pressure as
follows:

1. Set the system switch to ON.

2. Close other cylinder valves and disconnect pipeline gas supplies. Do not disconnect the
O2 pipeline. If pipeline O2 is not available, connect O2 cylinder and open the O2 cylinder
valve.

3. Turn the flow controls for all gases (except O2) to the minimum flow.

4. Ensure that all cylinder and pipeline pressure gauges read zero.

5. Disconnect the O2 pipeline supply (or close the O2 cylinder valve). Press the O2 flush
button to bleed O2 from the system.

6. Set the system switch to OFF.

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3 Circuit System Disassembly

3.1 Remove the Top Panel

1 Pry up the eight screws covers and unscrew the eight screws exposed.

2 Lift the top panel followed by disconnecting the cable marked in the picture.

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3. Then you can see the circuit part.

3.2 Remove the CPU board

★Please first finish Part 3.1, then:
Disconnect all the cables and remove the four screws and then take out the CPU board.

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3.3 Remove the Button Board

★Please first finish Part 3.1, then:
Disconnect all the cables and remove the four screws and then take out the button board.

3.4 Remove the Monitor Board

★Please first finish Part 3.1, then:
Disconnect all the cables and tubes from the monitor board. Then unscrew the four
screws marked in the picture to remove the monitor board.

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3.5 Remove the Net Board

★Please first finish Part 3.1, then:
Disconnect the cable from the CPU board to the net board and remove the two screws
then take out the net board.

3.6 Remove the CIS interface board

★Please first finish Part 3.1, then:
Disconnect the cable from the CPU board to the net board and remove the three screws
then take out the CIS interface board.

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