Welch Allyn Micropaq 406 Service Manual
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Welch Allyn Micropaq 406 Service Manual

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Micropaq
Monitor
®
Service Manual
Model 406 and Model 408
Software version 1.7X

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Summary of Contents for Welch Allyn Micropaq 406

  • Page 1 Micropaq Monitor ® Service Manual Model 406 and Model 408 Software version 1.7X...
  • Page 2 Welch Allyn. Welch Allyn assumes no responsibility for injury or for any illegal or improper use of the product that may result from failure to use this product in accordance with the instructions, cautions, warnings, or indications for use published in this manual.

  • Page 3: Table Of Contents

    Contents 1 - Safety summary ......... 1 General safety considerations .
  • Page 4 Micropaq 406 ........

  • Page 5: Safety Summary

    • If the monitor detects a problem that prevents it from operating properly, it displays an error message and error number. Report such errors to Welch Allyn. • Do not service a monitor under warranty. Servicing a monitor under warranty voids the warranty.

  • Page 6: Symbols

    Safety summary Welch Allyn Micropaq Monitor Caution Do not autoclave the monitor. Autoclave accessories only if the manufacturer's instructions clearly approve it. Many accessories can be severely damaged by autoclaving. Symbols The following symbols appear on the monitor or accessories.
  • Page 7 Service Manual Safety summary Symbol Definition Symbol Definition The monitor is connected to Acuity The monitor is not connected to Acuity (Flashing) The monitor is searching for a FCC ID: This device complies with FCC and connection to Acuity PGUWA11AO7 Industry Canada requirements for international radiators (802.11 wireless) 4168a-WA11A07...

  • Page 8: Electrostatic Discharge (Esd)

    Safety summary Welch Allyn Micropaq Monitor Electrostatic discharge (ESD) ATTENTION CAUTION OBSERVE PRECAUTIONS FOR HANDLING ELECTROSTATIC SENSITIVE ELECTRONIC DEVICES DO NOT SHIP OR STORE NEAR STRONG SENSITIVE DEVICES ELECTROSTATIC, ELECTROMAGNETIC, MAGNETIC OR RADIOACTIVE FIELDS. WARNING Electrostatic discharge (ESD) can damage or destroy electronic components.

  • Page 9: Overview

    For service information about any other monitor, refer to the service manual for that monitor. Any service work not described in this manual must be performed by qualified service personnel at the factory or at an authorized Welch Allyn service center. (For contact information, see page ii.)

  • Page 10: Technical Support And Repair Services

    • Inspect the rear panel fuses for compliance to specified rating More frequent service may be needed in extreme environments (heat, cold, dust, etc.). Contact Welch Allyn at one of the numbers listed on page Returning products To return a product for service, contact Welch Allyn (see...

  • Page 11: Product Configurations

    • Write the Welch Allyn RMA number with the Welch Allyn address on the outside of the shipping carton. Product configurations All models have FlexNet/Acuity communication enabled. Configurations for the available...

  • Page 12: Connectors, Indicators And Controls

    Overview Welch Allyn Micropaq Monitor Connectors, indicators and controls Connector ECG Connector Visual Alarm Indicator Liquid Crystal Display Select Key and Silence Patient Alarm/ Equipment Alert Key Scroll Up Key and Reset Patient Alarm Tone Key Snapshot Scroll Down Key and Main Menu Key...

  • Page 13: Indicators

    Service Manual Overview Indicators Visual Alarm indicator Green Flashes slowly during normal operation. Flashes during patient alarm. Remains on continuously when alarms are silenced or suspended. Yellow Flashes during an equipment alert and while the monitor is not connected to the network.

  • Page 14: Battery

    Insert the battery to turn on power. Remove the battery to turn off power. (While the battery is removed, no monitoring occurs.) Recharge the battery while it is removed from the monitor. To order a new battery, contact Welch Allyn (see page ii).

  • Page 15: Functional Verification

    Functional verification This procedure helps to confirm the proper operation of the Micropaq monitor. No monitor disassembly is required. The following equipment is required: Model Required equipment 406 and 408 • Fluke Patient Simulator PS415, PS420, or MPS450 (or equivalent ECG patient simulator) •...

  • Page 16: Power-Up Test

    • A power-up screen with the model number appears for a few seconds, followed by an initial monitoring screen with no error messages. If the monitor does not power up properly, contact Welch Allyn Technical Support (page for assistance. System test...
  • Page 17 Service Manual Functional verification 4. Press to highlight DISPLAY TEST, and then press to display the Display Test screen. Display Test screen 5. Press once to highlight CYCLE, and then press Press to cycle through all display tests while observing the screen. Watch for any defects such as pixel deficiencies, stuck pixels, or nonuniform illumination.

  • Page 18: Ecg And Alarm Indicators Test

    Functional verification Welch Allyn Micropaq Monitor ECG and alarm indicators test Turn on power to the ECG simulator and set the values as: • ECG waveform: Normal sinus rhythm • ECG rate: 80 beats per minute (bpm) • ECG size: 1mV amplitude 2.

  • Page 19: Spo 2 Test (Model 408 Only)

    Service Manual Functional verification 9. Press to acknowledge the alert and suspend the alarm. 10. Verify the audio alert stops and the equipment alert is no longer displayed. 11. Reconnect the ECG cable from the monitor. 12. Increase the heart rate to 140 bpm on the patient simulator. 13.
  • Page 20 Functional verification Welch Allyn Micropaq Monitor 9. Verify the LED flashes red, an audio alert sounds, the SpO and PR-BPM numeric flashes, and “Patient Alarm” is displayed. 10. Press and verify the audio alarm suspends for 90 seconds, “Patient Alarm” is displayed and the LED remains red but is no longer flashing.

  • Page 21: Network Test

    Service Manual Functional verification Network test Observe the screen and confirm that the network connection symbol appears (indicating that the monitor is communicating with the network). Connection symbol: Network connection is established. Example of Initial Monitor Screen No Connection symbol: The monitor is searching for a network connection.

  • Page 22: Eight-Bay Battery Charger Functional Verification

    Functional verification Welch Allyn Micropaq Monitor 5. Verify that the LED above the screen in the upper right corner of the monitor is blinking green. This indicates communication between the monitor and the Acuity system. Refer to the communication status symbols below, as they appear in the lower left corner of the monitor display.

  • Page 23: System Information Menu

    Service Manual Functional verification 5. Insert two fuses of the appropriate rating into the fuse holder: Fuses: T1.25 A/250 V, Time-Delay, 5x20 mm (503-0111-XX) WARNING Fire Hazard. To protect against fire hazard, always replace fuses with the specified type, size, current rating, and voltage rating. 6.

  • Page 24: Spo2 Information

    DIR: Total number of directed packets received ERRORS: Total number of RX packet errors (xxx%): The calculated percentage of errors during the last update period PSICP TX / RX Total number of PSICP packets sent and received in this PSICP session. Welch Allyn internal use only.
  • Page 25 Service Manual Functional verification PWR MODE/PSP PWR MODE (5 GHz radio card): Settings are NONE, ERROR, INITIALIZING, CHANGING, FLASHING, HIBERNATE, STANDBY, IDLE, NORMAL, FAST, RESET. PWR MODE (2.4 GHz radio card): Power state ON, OFF PSP: Power Save Poll Mode, 1-10 or CAM LOST COMMS / LOST COMMS: The number of times communication has been LOW RSSI EVENTS...

  • Page 26: Network Status

    Functional verification Welch Allyn Micropaq Monitor Network status The Network Status screen displays the current status of the monitor and its communication channel. Network Status screen RSSI Current RSSI (Received Signal Strength Indicator) value. Displayed as a negative number. Indicates the strength (in dBm) of the radio signal as seen by the associated access point.

  • Page 27: Reset Radio Menu

    Service Manual Functional verification GATEWAY Radio card/monitor’s gateway setting (DHCP or static assigned) STATUS Normal startup messages include: • RADIO INITIALIZING • SEARCHING FOR AN ACCESS POINT • AUTHENTICATING • RADIO ASSOCIATED • REQUESTING IP ADDRESS • IP ADDRESS ASSIGNED •...

  • Page 28: Resetting The Radio To Factory Defaults

    Functional verification Welch Allyn Micropaq Monitor Resetting the radio to factory defaults The menu may be entered from either the Network Status screen or the Network Monitor screen. Press the scroll down key to access the Main menu, and then repeatedly press until SYSTEM INFORMATION MENU is highlighted.

  • Page 29: Change The Network Name

    Service Manual Functional verification Change the network name Use this procedure to change the network name assigned to the monitor. This procedure applies only if the current net name is one of the names available Note in the Network Name menu. For other network names, see “Changing a custom network name”...

  • Page 30: Changing A Custom Network Name

    If the current monitor network name is a custom name, the monitor displays the following screen: You cannot change the network name using the Network Name menu. Press to return to the Service menu. Contact Welch Allyn (page ii) for assistance.

  • Page 31: Troubleshooting

    Caution Replace parts, components, or accessories only with parts supplied or approved by Welch Allyn. The use of any other parts can lead to inferior monitor performance and will void the product warranty.
  • Page 32 Broken SpO flex cable solder Check for fractured solder joints on the SpO connection. connector (often caused by dropping the monitor). Send the monitor to Welch Allyn factory service for repair. Broken SpO flex cable. Replace the rear case assembly. See "Removing the...

  • Page 33: Radio Troubleshooting Chart

    Verify an Acuity station is available on the network TIMEOUT station RADIO CARD There is a problem with the radio card Return the monitor to Welch Allyn factory service HARDWARE FAULT (2.4 GHz radio only) for repair RADIO CARD WRONG...

  • Page 34: Alert Messages And Display Information

    • Remove and then reinsert the battery to power up again and see if the key is still stuck. If it is, return the monitor to Welch Allyn for service. System Error The equipment problem is so serious the monitor cannot be used.

  • Page 35: Repair Procedures

    Repair procedures Introduction This section provides instructions for disassembly and reassembly of the monitor. Caution Perform all repair procedures at a static-protected station. Caution When the monitor case is opened, all parts must be regarded as extremely fragile. All procedure steps must be executed with care and precision. Required tools and equipment •...

  • Page 36: Zero Insertion Force (Zif) Connectors

    Repair procedures Welch Allyn Micropaq Monitor Zero Insertion Force (ZIF) connectors The monitor uses flex cables and zero insertion force (ZIF) flex cable connectors. The flex cables are all marked with a designator number which corresponds to a PCB board designator.
  • Page 37 Service Manual Repair procedures 3. Push the latching piece toward the connector body until it locks into place. Connector locations Connector Description Connects with Referred to on... (Main Board) J1 (ZIF connector) ECG (flex cable) External ECG connector (flex cable) page 37 J3 (ZIF connector) Keyboard (flex cable)

  • Page 38: Procedures

    Repair procedures Welch Allyn Micropaq Monitor Procedures Disassembly - Model 408 ......... .34 Reassembly - Model 408 .

  • Page 39: Removing The Spo 2 Board

    Service Manual Repair procedures 4. Remove the four screw covers in the battery compartment. 5. Remove all eight case screws. Case screws 6. Place the Micropaq display-side down and carefully lift the back case away from the front case, starting at the bottom. Caution Open the case 120 degrees and support the rear case as shown below to prevent stress on the SpO flex cable.

  • Page 40: Disconnecting The Spo Board (Masimo Models)

    Repair procedures Welch Allyn Micropaq Monitor 2. Remove the screws and nylon shoulder washers at the locations shown below. Note Do not damage the SpO foil shield when removing the nylon shoulder washers. The Masimo version has two screws with nylon shoulder washers. The Nellcor Note version has only one screw with a nylon shoulder washer, as shown below.

  • Page 41: Disconnecting The Spo Board (Nellcor Models)

    Service Manual Repair procedures 2. Lift the SpO board, and disconnect the flex cables from connectors J1 and J3. 3. Continue with “Removing the rear case” on page 38. Disconnecting the SpO board (Nellcor models) Unplug the flex cables from connectors J1 and J2.

  • Page 42: Removing The Rear Case

    Repair procedures Welch Allyn Micropaq Monitor 2. Slide the SpO board out from under the two bracket hooks (shown at left in the illustration below). Bracket hook Bracket hook 3. Remove the SpO board. Removing the rear case Remove the ECG flex cables from connector J1 on the main board.

  • Page 43: Removing The Front Case And/Or Replacing The Display (5 Ghz)

    Service Manual Repair procedures Removing the front case and/or replacing the display (5 GHz) Unplug the display cable from connector J4 and keyboard cable from connector J3. (SpO shield not shown here for clarity.) 2. Lift the main board subassembly (main board, subframe and radio card) out of the front case, leaving enough room to access the antenna cables.

  • Page 44: Removing The Front Case And/Or Replacing The Display (2.4 Ghz)

    Repair procedures Welch Allyn Micropaq Monitor 5. Remove the antenna board and connecting cables from the front case. Caution Do not disconnect the antenna cables from the antenna board. The connectors are easily damaged and may not be reused unless a special extractor tool is used to disconnect the cables from the board.
  • Page 45 Service Manual Repair procedures If the rear case has already been removed, lift the mainboard, subframe and radio card as one assembly out of the front case and set it aside. 3. Remove the display from the front case by lifting the rubber cushions. Rubber cushions Rubber cushions 4.

  • Page 46: Reassembly - Model 408

    Repair procedures Welch Allyn Micropaq Monitor Reassembly - Model 408 Installing the display The first two steps apply only if you are installing a new display. If you are reusing Note a display, skip to step 3 on page Caution The display flex cable is fragile. Damage may result if the flex cable is bent too sharply or if its connection with the circuit board is stressed.
  • Page 47 Service Manual Repair procedures 4. Install the display in the front case by pressing the rubber cushions down to seat the display. Rubber cushions Rubber cushions 5. Carefully bend the display flex cable so that it curves back toward the circuit board, as shown in the diagram below.

  • Page 48: Installing The Main Board, Subframe And Radio Card (5 Ghz)

    Repair procedures Welch Allyn Micropaq Monitor Installing the main board, subframe and radio card (5 GHz) Place the main board subassembly (main board, subframe and radio card) with the radio-card side down to the left of the front case as shown.
  • Page 49 Service Manual Repair procedures 3. Screw the antenna on to the front case. Antenna screw 4. Route the cable underneath the display and keyboard cables as shown. Screw standoff Display cushion 5. While supporting the main board subassembly, carefully route the shorter gray antenna cable between the screw standoff and the display cushion.
  • Page 50 Repair procedures Welch Allyn Micropaq Monitor 6. Seat the main board into the front case with the subframe and the radio card facing up. Make sure the antenna wires are not pinched between the board and the screw insert. Connect the display cable to the J4 connector and lock the latching piece (refer to “Zero Insertion Force (ZIF) connectors”...
  • Page 51 Service Manual Repair procedures Caution When attaching the J3 connector, bend the flex cable toward the connector in a smooth radius curve (as shown below) to avoid cable damage. Smooth curve in flex cable Sharp bend in flex cable Correct Incorrect 10.
  • Page 52 Repair procedures Welch Allyn Micropaq Monitor 12. Insert the SpO flex cable into the J9 connector and lock the latching piece. flex cable 13. Install the SpO shield and align the screw tabs in the center of the shield into the case screw holes.

  • Page 53: Installing The Main Board, Subframe And Radio Card (2.4 Ghz)

    Service Manual Repair procedures 14. For Masimo models, continue with the next section. For Nellcor models, continue with “Installing the SpO board (Nellcor models)” on page 54. Installing the main board, subframe and radio card (2.4 GHz) Install the main board, subframe and radio card as one assembly onto the front case. (SpO shield not shown here for clarity.) 2.
  • Page 54 Repair procedures Welch Allyn Micropaq Monitor 3. Place the main board into the front case and align the screw holes on the frame with the standoffs in the case. Screw standoffs 4. Insert the keyboard cable into the J3 connector and lock the latching piece.
  • Page 55 Service Manual Repair procedures 5. Re-insert the rubber gasket (part of the fastener kit) into the groove in the front case. Begin inserting the gasket at the top of the rear case in the four-turn groove area. Position the rubber gasket flat in the groove of the front case. Four-turn groove area 6.
  • Page 56 Repair procedures Welch Allyn Micropaq Monitor 8. Install the SpO shield and align the screw tabs in the center of the shield into the case screw holes. Screw tabs 9. For Masimo models, continue with the next section. For Nellcor models, continue with “Installing the SpO...

  • Page 57: Installing The Spo 2 Board (Masimo Models)

    Service Manual Repair procedures Installing the SpO board (Masimo models) This section covers installation of the SpO board on Masimo models. For Nellcor models, go to “Installing the SpO board (Nellcor models)” on page 54. Caution When connecting the SpO2 cable from the rear case, open the case 120 degrees and support the rear case as shown below to prevent stress on the flex cable.

  • Page 58: Installing The Spo 2 Board (Nellcor Models)

    Repair procedures Welch Allyn Micropaq Monitor Installing the SpO board (Nellcor models) This section covers installation of the SpO board on Nellcor models. For Masimo models, go to “Installing the SpO board (Masimo models)” on page 53. Caution When connecting the SpO2 cable from the rear case, open the case 120 degrees and support the rear case as shown below to prevent stress on the flex cable.

  • Page 59: Installing The Spo 2 Shield

    Service Manual Repair procedures 2. Carefully slide the SpO board under the two bracket hooks as shown. Bracket hook Bracket hook Installing the SpO shield Fold the SpO shield closed, with the short side overlapping the long side. 2. Insert the nylon shoulder washer(s) at the location(s) shown above and fully seat in the SpO shield.

  • Page 60: Closing The Case

    Repair procedures Welch Allyn Micropaq Monitor 4. Place metal washers and screws in the locations shown below and torque to 3 in. lbs. Screws with metal washers Closing the case Align the SpO clip on the rear case with the slot on the front case.
  • Page 61 Service Manual Repair procedures Remove the battery. 8. Screw the rear case to the front case with the remaining screws, making sure the rubber gasket stays in its groove. Torque the screws as shown in the illustration below. Use all new screws, label covers and rubber feet (supplied in the service fastener Note kit) when reassembling the case.

  • Page 62: Attaching Labels

    Repair procedures Welch Allyn Micropaq Monitor Attaching labels The screw covers and notched labels are part of the service fastener kit. The rear case, battery well, clear serial number cover (not shown below) and the blank serial number labels are included in the rear case service kit.

  • Page 63: Disassembly - Model 406

    Service Manual Repair procedures Disassembly - Model 406 This procedure covers the Model 406 monitor with ECG only. Opening the case Remove the battery pack. 2. Remove the two rubber feet using tweezers. Rubber feet 3. Remove the two rubber screw plugs from the external case using a spudger or paper clip.
  • Page 64 Repair procedures Welch Allyn Micropaq Monitor 6. Place the Micropaq display-side down and carefully lift the back case away from the front case, starting at the bottom. Caution Open the case 120 degrees and support the rear case as shown below to prevent stress on the ECG flex cable.

  • Page 65: Removing The Front Case And/Or Replacing The Display (5 Ghz)

    Service Manual Repair procedures Removing the front case and/or replacing the display (5 GHz) Unplug the display cable from connector J4 and keyboard cable from connector J3. 2. Lift the main board subassembly (main board, subframe and radio card) out of the front case, leaving enough room to access the antenna cables.
  • Page 66 Repair procedures Welch Allyn Micropaq Monitor 4. Remove the screw securing the antenna board to the front case. Antenna board screw 5. Remove the antenna board and the connecting cables from the front case. Caution Do not disconnect the antenna cables from the antenna board. The connectors are easily damaged and may not be reused unless a special extractor tool is used to disconnect the cables from the board.

  • Page 67: Removing The Front Case And/Or Replacing The Display (2.4 Ghz)

    Service Manual Repair procedures Removing the front case and/or replacing the display (2.4 GHz) Unplug the display cable from connector J4 and keyboard cable from connector J3. 2. Remove main board, subframe, and radio card (as one assembly) from the front case. Caution Do not separate the main board, the subframe, and the radio card.

  • Page 68: Reassembly - Model 406

    Repair procedures Welch Allyn Micropaq Monitor Reassembly - Model 406 Installing the display The first two steps apply only if you are installing a new display. If you are reusing Note a display, skip to step 3 on page Caution The display flex cable is fragile. Damage may result if the flex cable is bent too sharply or if its connection with the circuit board is stressed.
  • Page 69 Service Manual Repair procedures 4. Install the display in the front case by pressing the rubber cushions down to seat the display. Rubber cushions Rubber cushions 5. Carefully bend the display flex cable so that it curves back toward the circuit board, as shown in the diagram below.

  • Page 70: Installing The Main Board, Subframe And Radio Card (5 Ghz)

    Repair procedures Welch Allyn Micropaq Monitor Installing the main board, subframe and radio card (5 GHz) Place the main board subassembly (main board, subframe and radio card) with the radio-card side down to the left of the front case as shown.
  • Page 71 Service Manual Repair procedures 3. Screw the antenna on to the front case. 4. Route the cable underneath the display and keyboard cables as shown. Screw standoff Display cushion 5. While supporting the main board subassembly, carefully route the shorter gray antenna cable between the screw standoff and the display cushion.
  • Page 72 Repair procedures Welch Allyn Micropaq Monitor 8. Make sure the main board screw holes align with the standoffs in the case, and the antenna cables are not pinched between the board and the screw insert. Screw standoffs 9. Insert the keyboard cable into the J3 connector and lock the latching piece.

  • Page 73: Installing The Main Board, Subframe And Radio Card (2.4 Ghz)

    Service Manual Repair procedures 10. Re-insert the rubber gasket (part of the fastener kit) into the groove in the front case. Begin inserting the gasket at the top of the rear case in the four-turn groove area. Position the rubber gasket flat in the groove area of the front case. Four-turn groove area 11.
  • Page 74 Repair procedures Welch Allyn Micropaq Monitor 2. Connect the display cable to the J4 connector and lock the latching piece (refer to “Zero Insertion Force (ZIF) connectors” on page 32 for complete ZIF connector installation instructions.) Note Tilt the assembly slightly toward the connectors, as shown, to allow insertion of the display flex cable into the J4 connector.
  • Page 75 Service Manual Repair procedures Smooth curve in flex cable Sharp bend in flex cable Correct Incorrect 5. Re-insert the rubber gasket (part of the fastener kit) into the groove in the front case. Begin inserting the gasket at the top of the rear case in the four-turn groove area. Position the rubber gasket flat in the groove area of the front case.

  • Page 76: Closing The Case

    Repair procedures Welch Allyn Micropaq Monitor Closing the case Align the SpO clip on the rear case with the slot on the front case. cover cover 2. Make sure the rubber gasket is lying flat in the groove of the front case.
  • Page 77 Service Manual Repair procedures Remove the battery. 8. Screw the rear case to the front case with the remaining screws, making sure the rubber gasket stays in its groove. Torque the screws as shown in the illustration below. Use all new screws, label covers and rubber feet (supplied in the service fastener Note kit) when reassembling the case.

  • Page 78: Attaching Labels

    Repair procedures Welch Allyn Micropaq Monitor Attaching labels The screw covers and notched labels are part of the service fastener kit. The rear case, battery well, clear serial number cover (not shown below) and the blank serial number labels are included in the rear case service kit.

  • Page 79: Technical Overview

    • Pulse oximetry (SpO ) monitoring (Model 408 only) • Two-way wireless communication within Welch Allyn’s FlexNet network • LCD for display of ECG waveforms, SpO and heart rate/pulse rate data, and messages from Acuity • Standalone operation with patient alarms when out of range of the network •...

  • Page 80: Micropaq 406

    Nellcor OxiMax technology Understanding Micropaq and the FlexNet Network The monitor is intended to operate with an Acuity Central Station as part of Welch Allyn’s FlexNet network. FlexNet allows multiple devices to communicate through hardwired Ethernet networks and Wireless Local Area Networks (WLANs). The Acuity Central Station provides the primary display and entry of patient data for a patient connected to the monitor.

  • Page 81: Field Replaceable Units

    Field Replaceable Units This list includes field-replaceable service parts only. Product accessories are listed separately in Welch Allyn Products and Accessories (810-0409-XX), which is available from Welch Allyn Customer Service. The following table lists service kits and the included parts for the Micropaq monitor.
  • Page 82 Field Replaceable Units Welch Allyn Micropaq Monitor Table 1. Service parts list Order Number Item Description Model 020-0698-XX Service Kit, Front Case Subassembly 408 PPO+ Contains: Upper housing with plastic window and keyboard Blank ID label (.75” x .25”) 020-0699-XX...

  • Page 83: A - Micropaq Exploded View

    Micropaq exploded view Front case ID label Rubber cushions Display Main board and subframe assembly Radio card card Gasket Rear case SpO2 connector clip/ cover and screws 2-56 x 7/8 Pan head screws 2-56 x 3/16 4-40 x 3/8 Pan head screws Pan head screws Rubber feet 4-40 x 3/8...
  • Page 84 Micropaq exploded view Welch Allyn...

This manual is also suitable for:

Micropaq 408

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