Welch Allyn Micropaq 402 Service Manual
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Welch Allyn Micropaq 402 Service Manual

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Micropaq
Monitor
®
Service Manual
Model 402 and Model 404
Software version 1.5X

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Summary of Contents for Welch Allyn Micropaq 402

  • Page 1 Micropaq Monitor ® Service Manual Model 402 and Model 404 Software version 1.5X...
  • 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 402 ........

  • 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 Symbols The following symbols appear on the monitor, battery charger or accessories. Symbol Definition Symbol Definition Direct current (battery charger) Enclosure Protection Drip proof: Classification IPX1 IPX1 per EN60529: 1991 Alternating current (battery charger)

  • Page 7: Electrostatic Discharge (Esd)

    Service Manual Safety Summary Monitor Front Panel Keys Select Key and Silence Patient Alarm/Equipment Scroll Up Key and Reset Alarm Tone Key- Alert Key- Selects the choice highlighted on the Scrolls up menus on the display. During menu. During patient alarms, silences the tone at patient alarms, resets the tone at the monitor the monitor and Acuity (if connected) for 90 and Acuity (if connected).
  • Page 8 Safety Summary Welch Allyn Micropaq Monitor • Perform all service procedures in a static-protected environment. Always use techniques and equipment designed to protect personnel and equipment from electrostatic discharge. • Remove static-sensitive components and assemblies from their static-shielding bags only at static-safe workstations—a properly grounded table and grounded floor mat—and only when you are wearing a grounded wrist strap (with a resistor...

  • 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 Technical Support at one of the numbers listed on page Returning Products To return a product for service, contact Welch Allyn Technical Support...

  • Page 11: Product Configurations

    • Write the Welch Allyn RMA number with the Welch Allyn address on the outside of the shipping carton. Product Configurations Configurations for the available model numbers are as follows:...

  • 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 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

    Overview Welch Allyn Micropaq Monitor • During patient alarms, silences the tone at the monitor and Acuity (if connected) for 90 seconds. During equipment alerts, silences or acknowledges (dismisses) the alert at the monitor and at Acuity. Battery Insert the battery to turn on power. Remove the battery to turn off power. (While the battery is removed, no monitoring occurs.)

  • 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 402 and 404 • DNI Nevada Inc. Patient Simulator 217A or 214B (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 Test

    Functional Verification Welch Allyn Micropaq Monitor ECG Test Turn on power to the ECG simulator. 2. Connect the ECG cable to the monitor and to the ECG simulator. 3. Set the ECG simulator for a normal sinus rhythm. Confirm that the monitor displays a normal sinus rhythm ECG waveform with a heart rate that is the same (±...

  • Page 19: 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 20: 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 21 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 22: System Information Menu

    Functional Verification Welch Allyn Micropaq Monitor System Information Menu The System Information Menu provides additional information that may be required during service activity. To access the System Information Menu: From the monitoring screen, press to access the Main Menu. 2. Press...

  • Page 23: Network Monitor

    Service Manual Functional Verification Network Monitor Use the Network Monitor screen as a diagnostic aid for troubleshooting wireless connections between the monitor and a network access point. LOAD LEVELING If nonzero, indicates the number of times the monitor has roamed to another access point because the previous access point was too busy.

  • Page 24: 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 Examples FIRMWARE VER Firmware version of the radio card. S24 COUNTRY Controlled by the access point with which the monitor is associated.

  • Page 25: 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 26: 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 Technical Support (page ii) for assistance.

  • Page 27: 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 28 Replace the appropriate front case assembly. ECG external connector is damaged. Replace the appropriate front case assembly. Bad main board. Send the monitor to Welch Allyn factory service for repair. The monitor is not Outside of access point coverage area.

  • Page 29: Alert Messages And Display Information

    Service Manual Troubleshooting Alert Messages and Display Information Message and Display Possible Cause(s) and Suggested Response Information LOW BATTERY The monitor will shut down in less than 30 minutes due to a low battery. • Replace the battery as soon as possible. VERY LOW BATTERY The monitor will shut down in less than 5 minutes due to a low battery.
  • Page 30 Troubleshooting Welch Allyn Micropaq Monitor...

  • Page 31: 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 32: 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 33 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 34 J3 (ZIF connector) Keyboard (flex cable)

  • Page 34: Procedures

    Repair Procedures Welch Allyn Micropaq Monitor Procedures Disassembly - Model 404 ......... .30 Reassembly - Model 404 .

  • Page 35: Removing The Spo Board

    Service Manual Repair Procedures 4. Separate the case. Note If you are replacing only the rear case, proceed to the gasket replacement step on “Closing the Case” on page 46. Removing the SpO Board Remove the screws and metal washers at the locations shown below. Screws with metal washers 2.

  • Page 36: Disconnecting The Spo 2 Board (Masimo Models)

    Repair Procedures Welch Allyn Micropaq Monitor Disconnecting the SpO Board (Masimo models) Slide the SpO board out from under the two bracket hooks. Bracket hook Bracket hook 2. Lift the SpO board, and disconnect the flex cables from connectors J1 and J3.

  • Page 37: Disconnecting The Spo 2 Board (Nellcor Models)

    Service Manual Repair Procedures Disconnecting the SpO Board (Nellcor models) Unplug the flex cables from connectors J1 and J2. 2. Slide the SpO board out from under the two bracket hooks (shown at left in the illustration below). Bracket hook Bracket hook 3.

  • Page 38: Removing The Main Board, Subframe And Radio Card (All Models)

    Repair Procedures Welch Allyn Micropaq Monitor Removing the Main Board, Subframe and Radio Card (all models) Unplug the SpO flex cable at connector J11. flex cable at J11 2. Unplug the ECG sensor cable at connector J1. ECG sensor cable at J1 3.

  • Page 39: Removing The Display From The Front Case

    Service Manual Repair Procedures 4. Unplug the display cable from connector J4 and keyboard cable from connector J3. (SpO shield not shown here for clarity.) 5. Remove main board, subframe, and radio card (as one assembly) from the front case. (SpO shield not shown here for clarity.) Caution Do not separate the main board, the subframe, and the radio card.
  • Page 40 Repair Procedures Welch Allyn Micropaq Monitor Step a Step b Step c 2. If you are installing a new display, remove and save the rubber cushions. 3. Set the display down on a clean surface with the circuit board side facing up.

  • Page 41: Reassembly - Model 404

    Service Manual Repair Procedures Reassembly - Model 404 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 42 Repair Procedures Welch Allyn Micropaq Monitor 3. Press the rubber cushions onto the display, with the raised cushion corners up as shown. 4. Install the display in the front case using the procedure below. Caution Failure to follow the sequence below may result in damage to the display—the soldered connections next to the display may scratch the delicate...

  • Page 43: Installing The Main Board, Subframe And Radio Card

    Service Manual Repair Procedures Exposed flex circuit trace Circuit board side Display Display side 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. Installing the Main Board, Subframe and Radio Card Install the main board, subframe and radio card as one assembly onto the front case.
  • Page 44 Repair Procedures Welch Allyn Micropaq Monitor Note Tilt the assembly slightly toward the connectors, as shown, to allow insertion of the display flex cable into the J4 connector. (SpO shield not shown here for clarity.) 3. Insert the display flex cable into the J4 connector and lock the collar.
  • Page 45 Service Manual Repair Procedures Smooth curve in flex cable Sharp bend in flex cable Correct Incorrect Insert the ECG sensor cable into the J1 connector and lock the latching piece. ECG sensor cable at J1...
  • Page 46 Repair Procedures Welch Allyn Micropaq Monitor 8. Insert the SpO flex cable pin into the J11 connector. Caution The pin on the SpO flex cable can bend and break easily. Caution Do not to bend or tilt any of the neon bulbs. They must remain vertical.

  • Page 47: 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 SpO2 Board (Nellcor models)” on page 44. Attach the SpO sensor cables to connectors J1 and J3. 2.

  • Page 48: Installing The Spo 2 Board (Nellcor Models)

    Repair Procedures Welch Allyn Micropaq Monitor Installing the SpO Board (Nellcor models) Carefully slide the SpO board under the two bracket hooks as shown. Bracket hook Bracket hook 2. Plug the SpO cables into connectors J1 and J2.

  • Page 49: Installing The Spo 2 Shield (All Models)

    Service Manual Repair Procedures Installing the SpO Shield (all models) 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 50: Closing The Case

    Repair Procedures Welch Allyn Micropaq Monitor Closing the Case Insert the rubber gasket (part of the fastener kit) into the groove in the front case. Begin inserting the gasket in the end locking section, located on the lower edge of the case (as shown below).
  • Page 51 Service Manual Repair Procedures • the LEDs light red, yellow and green, • no error messages are received, • the keyboard works. 4. Remove the battery. 5. Adjust the ferrite bead to lay flat and square so that it does not interfere with the placement of the back case.

  • Page 52: Attaching Labels

    Repair Procedures Welch Allyn Micropaq Monitor Attaching Labels Most of the labels shown below are part of the service fastener kit. The clear serial number cover (not shown below) and the blank serial number label are included in the rear case service kit.

  • Page 53: Disassembly - Model 402

    Service Manual Repair Procedures Disassembly - Model 402 This procedure covers the Model 402 monitor with ECG only. Opening the Case Remove the battery pack. 2. Remove the rubber feet from the rear panel. 3. Remove the six case screws. Case screws 4.

  • Page 54: Removing The Main Board, Subframe And Radio Card

    Repair Procedures Welch Allyn Micropaq Monitor Removing the Main Board, Subframe and Radio Card Unplug the ECG sensor cable at connector J1. ECG sensor flex cable at J1 2. Remove the screws and rectangular washers from the subframe. Screws and rectangular washers...

  • Page 55: Removing The Display From The Front Case

    Service Manual Repair Procedures 4. 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. They are not serviceable. Separation will damage the single-use antenna connector, which can be replaced only at the factory.
  • Page 56 Repair Procedures Welch Allyn Micropaq Monitor Caution Do not bend or stress the display flex cable, especially at its connection to the circuit board. Caution Do not touch the display screen. Fingerprints are difficult to remove without damaging the display.

  • Page 57: Reassembly - Model 402

    Service Manual Repair Procedures Reassembly - Model 402 Installing the Display The first two steps of this section apply only if you are installing a new display. If Note you are reusing a display, skip to step 3 on page Caution The display flex cable is fragile.
  • Page 58 Repair Procedures Welch Allyn Micropaq Monitor 3. Press the rubber cushions onto the display, with the raised cushion corners up as shown. 4. Install the display in the front case using the procedure below. Caution Failure to follow the sequence below may result in damage to the display—the soldered connections next to the display may scratch the delicate...

  • Page 59: Installing The Main Board, Subframe And Radio Card

    Service Manual Repair Procedures Exposed flex circuit trace Circuit board side Display Display side 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. Installing the Main Board, Subframe and Radio Card Install the main board, subframe and radio card as one assembly onto the front case.
  • Page 60 Repair Procedures Welch Allyn Micropaq Monitor Note Tilt the assembly slightly toward the connectors, as shown, to allow insertion of the display flex cable into the J4 connector. 3. Insert the display flex cable into the J4 connector. 4. When placing the assembly into the case, verify that the flap on the antenna covers the ECG connector.

  • Page 61: Closing The Case

    Service Manual Repair Procedures Smooth curve in flex cable Sharp bend in flex cable Correct Incorrect Insert the ECG sensor cable into the J1 connector and lock the latching piece. Neon bulbs ECG sensor flex cable at J1 Caution Do not to bend or tilt any of the neon bulbs. They must remain vertical. 8.
  • Page 62 Repair Procedures Welch Allyn Micropaq Monitor Caution Do not stretch the gasket. Stretching the gasket will make reassembly more difficult, and may result in a poor seal between the front and rear case. Note Both ends of the gasket should extend as far as possible into the end locking section (refer to the drawing).
  • Page 63 Service Manual Repair Procedures 4. Remove the battery. 5. Verify that the neon bulbs are vertical, so that they are not crushed between the front and rear cases during reassembly. 6. Screw the rear case to the front case, making sure the rubber gasket stays in its groove.

  • Page 64: Attaching Labels

    Repair Procedures Welch Allyn Micropaq Monitor Attaching Labels Most of the labels shown below are part of the service fastener kit. The clear serial number cover (not shown below) and the blank serial number label are included in the rear case service kit.

  • Page 65: Technical Overview

    (Micropaq 404 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 •...

  • Page 66: Micropaq 402

    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 67: 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 parts available for the Micropaq monitor.
  • Page 68 Field Replaceable Units Welch Allyn Micropaq Monitor...

This manual is also suitable for:

Micropaq 404

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