Welch Allyn Proqaq LT Vital Service manual

Propaq® LT Vital Signs Monitor

Service Manual

Software version 1.5X

ii Welch Allyn Propaq LT Vital Signs Monitor

Welch Allyn assumes no responsibility for any injury to anyone, 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 statement of intended use published in this manual.

Welch Allyn, Propaq, Acuity, FlexNet, Smartcuf, and Flexible Monitoring are registered trademarks of Welch Allyn. ParamSet is a trademark of Welch Allyn.

Masimo, SET, and LNCS are registered trademarks, and FastSAT and APOD are trademarks, of Masimo Corporation. Possession or purchase of a Masimo SpO

-equipped monitor does not convey any express or implied license to use the

device with unauthorized sensors or cables which would, alone or in combination with this device, fall within the scope of one or more of the patents relating to this device.

Nellcor and Oximax are registered trademarks of Nellcor Puritan Bennett.

Software in this product is Copyright Welch Allyn or its vendors. All rights are reserved. The software is protected by United States of America copyright laws and international treaty provisions applicable worldwide. Under such laws, the licensee is entitled to use the copy of the software incorporated with this instrument as intended in the operation of the product in which it is embedded. The software may not be copied, decompiled, reverse-engineered, disassembled or otherwise reduced to human-perceivable form. This is not a sale of the software or any copy of the software; all right, title and ownership of the software remain with Welch Allyn or its vendors.

For information about any Welch Allyn product, call the nearest Welch Allyn representative:

USA 1800 535 6663

1315 685 4560

Canada 1800 561 8797 China 86 216 327 9631

European Call Center 353 46 906 7790 France 3315 569 5849

Germany 49 747 792 7186 Japan 8133 219 0071

Latin America 1305 669 9003 Netherlands 3115 750 5000

Singapore 656 419 8100 South Africa 2711 777 7555

United Kingdom 44 133 236 3812

Australia 6129 638 3000

800 074 793

This device complies with Part 15 of the FCC rules and with the rules of the Canadian ICES-003. Operation is subject to the following two conditions: (1) This device may not cause harmful interference and (2) this device must accept any interference received, including interference that may cause undesired operation.

Caution! Changes or modifications not expressly approved by Welch Allyn could void the purchaser’s authority to operate the equipment.

REF 810-2712-XX (CD) REF 810-2710-XX (Printed, English only)

Manual 810-2713-00 A, 12/2007

Welch Allyn, Inc. 8500 SW Creekside Place Beaverton, OR 97008-7107 USA

Welch Allyn Ltd Navan Business Park Dublin Road, Navan County Meath, Republic of Ireland

www.welchallyn.com

Printed in USA

Contents

1 - Safety summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

2 - Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

iii

Warnings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

General safety considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Electrostatic discharge (ESD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Purpose and scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Technical support services . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Returning products . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Product configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Recommended service intervals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Service options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Related documents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Service menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

3 - Troubleshooting and repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Troubleshooting chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Battery use and care. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Service chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Service menus for repair and network troubleshooting . . . . . . . . . . . . . . . . . . . 19

4 - Disassembly and reassembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Procedures overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

5 - Functional verification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

Functional verification overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

Equipment required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

Checklist and test results report form . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

6 - Replacement parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69

A - 35-ml test volume . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71

Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73

iv Contents Welch Allyn Propaq LT Vital Signs Monitor

Warnings

Safety summary

All users of the monitor must read this safety summary and all warning and caution statements in the manual.

WARNING Place the monitor and accessories in locations where they cannot harm the patient should they fall from a shelf or mount.

WARNING Do not connect more than one patient to a monitor.

WARNING Do not connect more than one monitor to a patient.

WARNING Do not use the monitor in an MRI suite or hyperbaric chamber.

WARNING To avoid explosion, do not operate the monitor in the presence of

flammable anesthetics.

WARNING Do not use cables with abraded or broken insulation.

WARNING Do not use a monitor that has been damaged. If a monitor has been

damaged, remove it from service until it has been verified for proper operation by qualified service personnel.

Caution Do not use cables that do not operate properly.

Caution Do not autoclave the monitor.

Caution Autoclave accessories only if the manufacturer’s instructions direct you

to do so. Many accessories can be severely damaged by autoclaving.

Caution Use only accessories recommended or supplied by Welch Allyn. (See Welch Allyn Products and Accessories, 810-0409-XX.) Always use accessories according to the manufacturer’s instructions.

General safety considerations

• Frequently check all cables, both electrically and visually.

• If the monitor detects an unrecoverable problem, it displays a brief ‘Fault’ message. (See “Alert Messages and Status Messages”, Propaq LT Vital Signs Monitor Directions for Use (810-1828-XX.) Report all such errors to Welch Allyn.

• Do not service a monitor under warranty. Servicing a monitor under warranty voids the warranty. All service on monitors under warranty must be performed by Welch Allyn or at a Welch Allyn authorized service center.

2 Safety summary Welch Allyn Propaq LT Vital Signs Monitor

Electrostatic discharge (ESD)

ATTENTION

CAUTION

SENSITIVE ELECTRONIC DEVICES

DO NOT SHIP OR STORE NEAR STRONG ELECTROSTATIC, ELECTROMAGNETIC,

MAGNETIC OR RADIOACTIVE FIELDS.

Caution Electrostatic discharge (ESD) can damage or destroy electronic components. Handle static-sensitive components only at static-safe workstation.

Caution Assume that all electrical and electronic components of the monitor are static-sensitive.

Electrostatic discharge is a sudden current flowing from a charged object to another object or to ground. Electrostatic charges can accumulate on common items such as foam drinking cups, cellophane tape, synthetic clothing, untreated foam packaging material, and untreated plastic bags and work folders, to name only a few.

Electronic components and assemblies, if not properly protected against ESD, can be permanently damaged or destroyed when near or in contact with electrostatically charged objects. When you handle components or assemblies that are not in protective bags and you are not sure whether they are static-sensitive, assume that they are static-sensitive and handle them accordingly.

OBSERVE PRECAUTIONS

FOR HANDLING

ELECTROSTATIC

SENSITIVE DEVICES

Symbols

• 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 of at least 1 megohm in series) or other grounding device.

• Use only grounded tools when inserting, adjusting, or removing static-sensitive components and assemblies.

• Remove or insert static-sensitive components and assemblies only with monitor power turned off.

• Insert and seal static-sensitive components and assemblies into their original static-shielding bags before removing them from static-protected areas.

• Always test your ground strap, bench mat, conductive work surface, and ground cord before removing components and assemblies from their protective bags and before beginning any disassembly or assembly procedures.

WARNING Indicates conditions that could lead to illness, injury, or death.

Caution In this manual, indicates conditions that could damage equipment or other property.

Overview

Purpose and scope

This is a reference for periodic preventive maintenance and corrective service procedures for the Propaq LT monitors, models 802LTAN, 802LT0N, 802LTRN, 802LTAS, 802LT0S, and 802LTRS.

Corrective service is supported to the level of field-replaceable units. Field-replaceable units include certain circuit-board assemblies, subassemblies, case parts, and other parts. All field-replaceable parts are listed in “Replacement parts” on page 69.

WARNING When performing a service procedure, follow the instructions exactly as presented in this manual. Failure to do so could damage the monitor, invalidate the product warranty, and lead to serious personal injury.

Caution No component-level repair of circuit boards and subassemblies is supported. Use only the repair procedures described in this manual.

Note

Repair and replacement of the main board is not supported. Any service work on the main board must be performed by certified and qualified service personnel at an authorized Welch Allyn service center. (For contact information, see page ii.)

Repair and replacement of the radio and the antenna is not supported. Any service work on the radio and the antenna must be performed by certified and qualified service personnel at an authorized Welch Allyn service center. (For contact information, see page ii.)

This guide provides troubleshooting information, assembly procedures, and instructions for functional testing and performance verification. It is intended for use only by technically qualified service personnel.

This guide applies only to the Propaq LT monitor. For service information about any other model of the Propaq monitor, refer to the service manual for that product.

Technical support services

Welch Allyn offers the following technical support services:

Telephone support (1-800-289-2501 and 1-503-530-7500) Loaner equipment Service agreements Service training Replacement service parts Factory service

4 Overview Welch Allyn Propaq LT Vital Signs Monitor

For information on any of these services, call one of the numbers listed on page ii.

Returning products

To return a product for service, contact Welch Allyn Technical Support and request a Return Material Authorization (RMA) number.

Note

Welch Allyn does not accept returned products without an RMA.

When requesting an RMA, please have the following information available:

• Product name, model number, and serial number.

• Your customer number.

• A contact name and phone number.

• A complete return shipping address.

• Any special shipping instructions.

• A purchase-order number or credit-card number if the product is not covered by warranty.

• A full description of the problem or service request.

Note

To ensure safe receipt of your monitor by the service center and to expedite processing and return of the monitor to you, thoroughly clean all residues from the monitor before you ship it to Welch Allyn.

United States federal regulations prohibit the processing of any device contaminated with blood-borne pathogens. Welch Allyn thoroughly cleans all returned monitors on receipt, but any monitor that cannot be adequately cleaned cannot be repaired.

Before shipping the monitor, please observe these packing guidelines:

• Remove from the package all hoses, connectors, cables, sensors, power cords, and other ancillary products and equipment, except those items that might be associated with the problem.

• Put the monitor, enclosed in a plastic bag with a packing list, into the original shipping carton with the original packing materials or into another appropriate shipping carton.

• Write the Welch Allyn RMA number with the Welch Allyn address on the outside of the shipping carton.

Product configurations

Model numbers for the configurations are as follows:

Model Monitoring Parameters FlexNet/Acuity

802LT0N ECG, NIBP, Nellcor SpO

802LTRN ECG, NIBP, Nellcor SpO

802LTAN ECG, NIBP, Nellcor SpO

Communication Enabled

No 007-0160-XX KA

Yes 802.11 FHSS 007-0161-XX KA

Yes 802.11a 007-0384-XX KA

Top-Level Assembly

Serial #

Prefix

Service Manual Overview 5

802LT0S ECG, NIBP, Masimo SpO

802LTRS ECG, NIBP, Masimo SpO

802LTAS ECG, NIBP, Masimo SpO

Yes 802.11 FHSS 007-0269-XX KA

Recommended service intervals

Interval or condition Action recommended Procedure

Every 6 - 24 months (per hospital protocols)

Every 36 months Replace the air filter “Replacing the air filter” on page 28

Every 36 months Replace the battery “Removing the lithium ion battery

The battery does not hold a charge Check battery capacity

The monitor has been dropped or otherwise damaged

The monitor is not functioning properly

Verify functionality “Functional verification” on page 53

Replace the battery

Verify functionality “Functional verification” on page 53

No 007-0268-XX KA

Yes 802.11a 007-0383-XX KA

assembly” on page 27

“Functional verification” on page 53 “Removing the lithium ion battery assembly” on page 27

The monitor does not pass the functional verification

Service options

Warranty service

All repairs on products under warranty must be performed or approved by Welch Allyn. Refer all warranty service to Welch Allyn Factory Service or another authorized Welch Allyn Service Center. Obtain an RMA number for all returns to Welch Allyn Factory Service. (See “Returning products” on page 4.)

Caution Unauthorized repairs will void the product warranty.

Non-warranty service

Welch Allyn Beaverton Factory Service and authorized Service Centers support nonwarranty repairs. Contact any Welch Allyn regional service center for pricing and service options.

Troubleshoot and repair, and then verify functionality

Return the monitor to an authorized Welch Allyn service center

“Troubleshooting and repair” on page 9 “Disassembly and reassembly” on page 23 “Functional verification” on page 53

“Returning products” on page 4

Welch Allyn offers modular repair parts for sale to support non-warranty service. This service must be performed only by qualified end-user biomedical/clinical engineers using this service manual.

6 Overview Welch Allyn Propaq LT Vital Signs Monitor

II 1mV/cm

Exit

Trends

Snapshots

Setup

Low

Med

HR/min

140/78

NIBP mmHg (102)

Resp/min

SpO2

OffOnOn

Alarm Tone

Suspend Audible Alarms:

Setup:

(90 sec)

HALL, ROBERT E.

3456187

3:00:06P

Adult,

Rm 239

Alarms

ECG

NIBP

Timings

High

Service

Configuration

Controls

Monitor

Power - Turn the monitor power on or off. Down - Move the cursor down to the next display

item.

Service menu

To access the monitor service menu:

From any main display screen (such as Large Numerics, Dual Waveform, ...):

1. Highlight , HR/PR, SpO2, NIBP, Resp, or , and then press .

2. Highlight Setup (at the bottom of the screen) and press . The setup menu appears.

HALL, ROBERT E.

II 1mV/cm

Action - Act based on what is highlighted. Silence/Reset - Silence the current alarm tone for

90 seconds or reset a silenced alarm tone.

Left - Move the

cursor left to the next display

item; decrease the parameter value.

Display - Cycle to the next configured display format, or cancel the current control, setup, or

pop-up menu. Right - Move the cursor right to the next display item; increase the parameter value.

Up - Move the cursor up to the next display item.

Snapshot - Record a 21

-second period of numeric

and waveform data.

Start/Stop NIBP - Start or stop an NIBP

measurement.

Cradle

Monitor Release - Press and hold while removing the monitor from the cradle.

Adult,

3456187

Rm 239

3:00:06P

Setup Menu

HR/min

Setup:

Suspend Audible Alarms: Alarm T one

Exit

3. Scroll right ( ) to highlight Service, and press . The service menu appears, with NIBP and Show Info highlighted.

NIBP mmHg (102)

Alarms

Service

Trends

140/78

ECG

NIBP

Resp/min

Timings

Off

Low

Med

Snapshots

SpO2

Configuration

(90 sec)

High

Setup

Service Manual Overview 7

II 1mV/cm

Exit

Trends

Snapshots

Setup

HR/min

NIBP mmHg

Resp/min

SpO2

Timings

Service

Alarms

ECG

NIBP

Setup

STEWART, ANN

7762940

3:00:06P

Adult

Rm ICU 263

(qualified service personnel only).

Select ( ) to enter service menus

Configuration

Exit

NIBP

STEWART, ANN

7762940

3:00:06P

Adult

Rm ICU 263

Service

ECG

SpO2

USB

Radio

Software

Display

Battery

Voltages

Buttons

NIBP

Show Info

NIBP Test

Characterize Pump

STEWART, ANN

II 1mV/cm

HR/min

Alarms

Setup

Service

Select ( ) to enter service menus

(qualified service personnel only).

Exit

Trends

STEWART, ANN

NIBP

Service

Display

NIBP

Show Info

NIBP mmHg

ECG

NIBP

ECG

SpO2

Battery

NIBP Test

7762940

Adult

Rm ICU 263

Resp/min

Timings

Snapshots

7762940

Adult

Rm ICU 263

USB

Voltages

Characterize Pump

3:00:06P

SpO2

Configuration

Setup

3:00:06P

Radio

Software

Buttons

Service

Exit

The service menu contains 10 sections:

Section Operations Status displays

NIBP Test NIBP, Characterize Pump Show Info

ECG Setup (Enable/Disable HR/PR Alarms) Parameters

SpO

USB (none) Show Info

Radio Monitoring (Monitor the radio), Set Netname Show Info, View and Set Netname

Software (none) View Error Log, View RAM Dump, View System Info

Display Run Pixel Test, Set Bias View Fonts

Battery (none) Show Info

Voltages (none) Show Info

Buttons Test Buttons (none)

(none) Show Info

8 Overview Welch Allyn Propaq LT Vital Signs Monitor

Troubleshooting and repair

Troubleshooting chart. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

Battery use and care . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16

Service chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Service menus for repair and network troubleshooting . . . . . . . . . . . . . . . . . . . 19

Troubleshooting chart

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.

General

Refer to “Service chart” on page 17 for information on the suggested corrective actions.

Symptom Possible cause Possible corrective action

The power-on self-test fails. (Indicator: 2 yellow LED flashes followed by an LED flash of any combination of green, yellow, and red).

Internal RAM failure. Cycle the power. If the error persists, send the

Software error.

Unexpected reset detected.

monitor to an authorized Welch Allyn Service Center for service. (See “Returning products” on page 4.)

“Recoverable Fault. Restart monitor.“

“System Fault. Service monitor.“

“System Fault. Service radio.“

“Battery Fault. Install new battery.“

“Equipment Alert. Charger Fault. Service Charger.“

An invalid condition has been detected that might be resolved by restarting the monitor.

An unrecoverable system error has occurred.

Radio fault detected. Send the monitor to an authorized Welch Allyn

The battery is not performing to specification.

Charging has timed out (Charger state 5).

Cradle power board failure. Insert another monitor and battery pack in the

Restart the monitor. If the fault does not reappear, continue to use the monitor.

Send the monitor to an authorized Welch Allyn Service Center for service. (See “Returning

products” on page 4.)

Service Center for service. (See “Returning

products” on page 4.)

Install a new battery. “Removing the lithium

ion battery assembly” on page 27.

Remove the monitor from the cradle and reinsert it, and then attempt again to charge the battery. If the timeout reoccurs, replace the battery. “Removing the lithium ion battery

assembly” on page 27.

cradle and verify that the symptoms persist. If yes, then replace the cradle power board.

“Disassembling the cradle” on page 45.

10 Troubleshooting and repair Welch Allyn Propaq LT Vital Signs Monitor

Symptom Possible cause Possible corrective action

Monitor fails to power up beyond the initial screen.

Button board not connected. Connect the button board to the main board.

“Separating the top and bottom chassis halves” on page 29.

Monitor is in the cradle and does not power up, and the cradle power indicator is off.

Monitor is latched in the cradle but does not power up. Power indicator on the cradle is on.

Monitor battery fails to charge. DC power is applied but the power indicator on the cradle remains off.

Monitor battery run time duration is less than specified.

Yellow indicator on the cradle. Monitor current draw is too high.

The battery is discharged and the cradle is not powering the monitor.

Defective power adapter. Replace the power adapter.

The charger input fuse is blown. Replace the fuse. “Replacing the fuse” on

Open the monitor power switch. Replace the bottom chassis (which includes

Problem with the cradle power board.

Problem with the monitor. Send the monitor to an authorized Welch Allyn

Blown power input fuse on the charger I/O panel.

The battery is deficient. Replace the battery. “Removing the lithium ion

Radio cannot link up to the Acuity Central Station.

Cradle circuit breaker is tripped. Charger state 1.

Monitor has no battery pack. Charger state 4.

Battery pack temperature is out of range. Charger state 3.

Battery pack voltage is too low or the battery fuse is blown. Charger state 4.

Verify that AC power is on, that the power adapter is plugged into AC power and into the cradle, and that the monitor is fully seated in the cradle.

page 45.

the power switch). “Removing the main board

from the bottom chassis assembly” on

page 34.

Replace the cradle power board.

“Disassembling the cradle” on page 45.

Service Center for service. (See “Returning

products” on page 4.)

Replace the fuse. “Replacing the fuse” on page 45.

battery assembly” on page 27.

See “Radio” on page 12.

Service the monitor or the cradle.

Install the monitor battery pack. “Removing the

lithium ion battery assembly” on page 27.

Return the battery pack to within the specified temperature range (0

Replace the battery pack. “Removing the

lithium ion battery assembly” on page 27.

°C - 40°C).

Battery pack fails to charge in the specified time. Charger state 5.

Battery cell(s) over voltage; probably a charge imbalance. Charger state 7.

Charger board failure. Examine the cradle internal cabling, the cradle

Missing or erroneous LCD characters Faulty LCD. Replace the LCD. “Disassembling the top

Remove the monitor from the cradle and reinsert it, and then attempt again to charge. If the timeout reoccurs, replace the battery pack.

“Removing the lithium ion battery assembly”

on page 27.

Replace the battery pack. “Removing the

lithium ion battery assembly” on page 27.

power board, and the interconnect board.

“Removing the power/USB flex connector from the bottom chassis” on page 44.

chassis” on page 32.

Service Manual Troubleshooting and repair 11

Symptom Possible cause Possible corrective action

Button or buttons inoperative. Faulty button or buttons. Replace the top chassis assembly.

“Disassembling the top chassis” on page 32.

Voltages displayed on the service menu are out of range.

Repeated occurrence of “SpO No sensor detected.“

Fault.

The NIBP air leak exceeds the specification.

“Equipment Alert. NIBP Fault. Air leak. Check hose.“

Repeated occurrence of “NIBP Fault. Air leak. Check hose.“

“Equipment Alert. NIBP Fault. Kinked or neonate hose.“

“Equipment Alert. NIBP Fault. Overpressure condition.“

Main board fault. Send the monitor to an authorized Welch Allyn

Service Center for service. (See page ii.)

The internal SpO2 connector is loose.

Secure the internal SpO2 connector. “Removing

the main board from the bottom chassis assembly” on page 34.

Faulty SpO

connector panel. Replace the connector panel. “Removing the

patient connector panel from the bottom chassis” on page 43.

Worn O-ring in the NIBP hose

Try a different NIBP hose or replace the O-ring.

connector.

Deficient NIBP check valve, bleed valve, or overpressure

Replace the valve. “Removing the NIBP

assembly from the main board” on page 39.

valve.

NIBP tubing not properly connected.

Connect the internal tubing. “Removing the

NIBP assembly from the main board” on

page 39.

If hoses and external fittings are not leaking, internal tubing might be disconnected.

Connect the internal tubing. “Removing the

NIBP assembly from the main board” on

page 39.

Internal tubing is disconnected. Connect the internal tubing. “Removing the

NIBP assembly from the main board” on

page 39.

Internal tubing is damaged. Replace the damaged section of internal

tubing. “Removing the NIBP assembly from the

main board” on page 39.

If the correct hose is connected and not kinked, then the internal tubing might be blocked.

Verfify that the internal in-line NIBP pneumatic components are properly installed, with no pinching or kinking of tubing. “Removing the

NIBP assembly from the main board” on

page 39.

A transient pressure pulse was

Restart the monitor. introduced into the cuff via sudden and excessive patient motion.

“Equipment Alert. NIBP Fault. Calibrating. Please wait.“

“Calibrating. Minimize motion.“

“Equipment Alert. NIBP Fault. Service required. NIBP disabled.“ The NIBP system self-test has failed 3 times without passing.

An NIBP measurement was attempted within 45 seconds of

Wait 45 seconds after turning on the monitor

before starting an NIBP measurement. monitor power-up.

An NIBP measurement was attempted while the NIBP

Wait 15 seconds and retry the NIBP

measurement. system was performing a baseline calibration.

Excessive cuff artifact. Reduce patient motion.

Excessive artifact. Minimize patient motion.

NIBP subsystem failure. Send the monitor to an authorized Welch Allyn

Service Center for service. (See “Returning

products” on page 4.)

12 Troubleshooting and repair Welch Allyn Propaq LT Vital Signs Monitor

Radio

Radio-equipped Propaq LT monitors support wireless connection to one of the two types of Acuity networks.

Model Wireless connection

802LTRN, 802LTRS 802.11 FHSS Acuity network

802LTAN, 802LTAS 802.11a Acuity network

802LT0N, 802LT0S none

In facilities with 802.11a networks, administrators can reconfigure the radio, the Acuity network, or both, to meet local security or policy requirements. When you send a model 802LTAN or 802LTAS monitor to Welch Allyn for service, the radio is reset to the factory configuration.

Caution If you send a model 802LTAN or model 802LTAS monitor to Welch Allyn for service and the monitor is then returned to you, you must reapply any custom radio settings to the monitor before you attempt to reconnect the monitor to your Acuity network.

Radio troubleshooting information applies only to radio-equipped monitors. It is not intended for comprehensive troubleshooting of the Acuity system. To troubleshoot the Acuity system, refer to the appropriate Acuity service contact for your system.

Symptom Possible Cause Possible Corrective Action

No Acuity connection—network communication icon ( ) is not displayed on the monitor screen.

No Acuity connection—network communication icon with slash ( ) is displayed on the monitor screen and the yellow indicator above the screen is lit.

No Acuity connection—network communication icon with slash ( ) and “Disconnected” are displayed on the monitor screen, and the green indicator above the screen is flashing.

Radio Monitoring service screen persistently displays “Searching for access point”; monitor displays ( ).

Radio Monitoring service screen persistently displays “Searching for access point” and “Radio sleeping”; monitor displays ( ). (802LTAN/802LTAS)

Display alternates between “search” and “radio sleeping”.

Wireless communication disabled in the monitor configuration.

Monitor is out of radio range.

802LTRN/S: RSSI > approx. 60. 802LTAN/S: RSSI > approx. 70.

Netname (ESSID) set wrong. Set the monitor network name to the Acuity

USB connected to the monitor through the cradle.

Monitor is intentionally disconnected from the network by the user.

Monitor radio cannot find a signal from the network.

The monitor Netname does not match the Acuity network name.

Use the configuration utility to enable wireless communication for the monitor.

Move the monitor within range of an Acuity access point.

network name. (Default: com.protocol.)

Disconnect the USB cable from the cradle.

Use the monitor interface to connect to the network.

Move the monitor within range of an access point on the current network.

Verify the Netname.

Move within range of an access point and wait for up to 3 minutes.

Set the monitor Netname to the Acuity network name (default: com.protocol).

Service Manual Troubleshooting and repair 13

Symptom Possible Cause Possible Corrective Action

Radio Monitoring service screen persistently displays “Searching for access point”; monitor displays ( ). (802LTAN/802LTAS)

Invalid authentication credentials; default network settings.

Invalid authentication credentials;

Reset the monitor radio to factory defaults:

1. Enter the service screen.

2. Press simultaneously .

3. Select Yes and press .

Refer to your Acuity network administrator.

custom network settings.

Radio Monitoring service screen persistently displays “Requesting an IP address” and ( ) is displayed on the monitor.

Radio Monitoring service screen persistently displays “Sending Acuity broadcast.”

DHCP server is down. Contact Welch Allyn Acuity technical support.

(See page ii.)

DHCP server has no more addresses.

All Acuity systems with wireless

Contact Welch Allyn Acuity technical support. (See page ii.)

Wait.

are unavailable.

The Acuity system is at capacity for

Turn off another wireless monitor.

licenses.

Frequent communication faults with no apparent cause. On the Radio Monitoring service screen, TX/RX errors (PERCENT) is > 5%.

Faulty antenna or poor antenna connection.

Send the monitor to an authorized Welch Allyn Service Center for service. (See “Returning

products” on page 4.)

Faulty radio connection. Send the monitor to an authorized Welch Allyn

Service Center for service. (See “Returning

products” on page 4.)

Poor radio coverage. Verify that the network has a sufficient density

of access points on the current network.

14 Troubleshooting and repair Welch Allyn Propaq LT Vital Signs Monitor

Battery states and service

State Description Type of State Possible Corrective Action

0 Battery state unknown. Normal transitory. Should not

persist.

1 Battery voltage too high.

(Indication can occur with the monitor in or out of the cradle.)

2 Battery fully charged. Normal operating state.

3 Battery partially charged. Normal operating state.

4 30 minutes of charge

remaining, undocked.

5 30 minutes of charge

remaining, docked.

6 5 minutes of charge remaining,

undocked.

7 5 minutes of charge remaining,

docked.

8 Battery is exhausted,

undocked.

9 Battery is exhausted, docked. Normal operating state.

10 Battery voltage is too low for

recharging, docked.

Fault—possible cell imbalance or charger fault

Normal operating state.

Normal transitory state.

Normal operating state.

Normal transitory state.

Normal operating state.

Faulty battery pack. Replace the battery pack. “Removing the

If the state persists, replace the battery pack. “Removing the lithium ion battery

assembly” on page 27.

Replace the battery pack (“Removing the

lithium ion battery assembly” on page 27)

or the cradle power board (“Disassembling

the cradle” on page 45).

lithium ion battery assembly” on page 27.

Service Manual Troubleshooting and repair 15

Charger states and service

State Description Charger

Status

LED

0 Charger state

unknown.

1 Monitor docked,

No-power fault.

2 Monitor docked,

charging.

3 Monitor docked,

temperature fault.

4 Monitor docked,

battery voltage too low for charging.

5 Monitor docked,

timeout fault.

n/a n/a Normal initial transitory state of

Off Off Normal operating state when the

Yellow On Fault—power to the monitor

Green Green Normal operating state. n/a

Yellow Green Fault—battery pack temperature is

Yellow Green Fault—battery pack can no longer

Yellow Green Fault—Battery pack failed to

Charger

Power

LED

Type of State Possible Corrective Action

very short duration.

monitor is in the cradle and the cradle is not powered.

Fault state if the cradle fuse is open.

automatically disconnected by the cradle. Possible monitor fault.

Fault—no monitor in the cradle, power input and input fuse OK.

out of range high or low.

be charged.

charge within the specified time.

n/a

If the power adapter is not connected, connect it.

Replace the fuse. “Replacing the

fuse” on page 45.

Attempt to recharge by removing the monitor from the cradle and reinserting the monitor in the cradle.

If the fault persists, attempt to recharge another monitor to determine whether the problem is with the cradle or with the monitor main board.

Power board fault. Replace the power board. “Disassembling the

cradle” on page 45.

Bring the battery pack temperature into specified range (0° C - 40° C).

Replace the battery pack.

“Removing the lithium ion battery assembly” on page 27.

Attempt again to charge by removing the monitor from the cradle and reinserting the monitor in the cradle.

6 Monitor docked,

charging complete.

7 Monitor docked,

overcharge fault.

8 Monitor not

docked.

Off Green Normal operating state. n/a

Yellow Green Fault—battery pack cells are

unbalanced or the cradle is faulty.

n/a n/a Normal operating state. n/a

Replace the battery pack.

“Removing the lithium ion battery assembly” on page 27.

Replace the battery pack (“Removing the lithium ion battery

assembly” on page 27).

Replace the power board in the cradle (“Disassembling the

cradle” on page 45).

16 Troubleshooting and repair Welch Allyn Propaq LT Vital Signs Monitor

Battery use and care

The battery meets specification when used in an environment between 0° C and 40° C.

• Operating the monitor in a cold environment (below 20° C) reduces battery run time. When the battery is returned to a warmer environment, battery run time returns to normal.

• Sustained charging at high temperatures (near 40° C) reduces battery life.

• The battery continues to discharge when removed from the monitor, but at a much slower rate than if it were in the monitor.

• The battery, when removed from the monitor, discharges more slowly at low temperatures and more quickly at high temperatures.

• Maintain battery capacity by storing the battery:

• in a discharged state

• removed from the monitor

• in a cool, dry place

Service Manual Troubleshooting and repair 17

Service chart

This chart shows which procedure to use for specific service operations on monitors not covered by warranty.

Caution Do not service a monitor under warranty. Any service not performed at a Welch Allyn service center voids the product warranty.

Monitor

Note

Do not attempt to replace any component, including the NIBP pressure transducers, soldered onto the main board. All service of the main board must be performed at the Welch Allyn factory service center.

Service Action

Replace the NIBP air filter. “Replacing the air filter” on page 28.

Replace the battery pack. “Removing the lithium ion battery assembly” on

page 27.

Replace the connector panel

Replace the LCD assembly

Replace the top case assembly (with button board and window)

Replace the bottom case assy (with power switch, power flex cable, and connector panel)

1. “Removing the patient connector panel from the

bottom chassis” on page 43.

2. “Functional verification” on page 53.

1. “Disassembling the top chassis” on page 32.

2. “Set LCD bias” on page 21

3. “Functional verification” on page 53.

1. “Disassembling the top chassis” on page 32.

2. “Functional verification” on page 53.

1. “Removing the main board from the bottom

chassis assembly” on page 34.

2. “Functional verification” on page 53.

Replace the NIBP pump, bleed and dump valves, check valve, or internal tubing

Update the software Send the monitor to a Welch Allyn service center.

Replace the main board Send the monitor to a Welch Allyn service center.

1. “Removing the NIBP assembly from the main

board” on page 39.

2. “Characterize NIBP” on page 19.

3. “Functional verification” on page 53.

(See “Returning products” on page 4.)

18 Troubleshooting and repair Welch Allyn Propaq LT Vital Signs Monitor

Cradle

Service Action

Replace the fuse

Replace the interconnect board

Replace the power board

Replace the I/O panel

Replace the upper housing

Replace the lower housing

1. “Replacing the fuse” on page 45.

1. “Disassembling the cradle” on page 45.

2. “Functional verification” on page 53.

1. “Disassembling the cradle” on page 45

2. “Functional verification” on page 53.

1. “Disassembling the cradle” on page 45

2. “Functional verification” on page 53.

1. “Disassembling the cradle” on page 45

2. “Functional verification” on page 53.

1. “Disassembling the cradle” on page 45

2. “Functional verification” on page 53.

Service Manual Troubleshooting and repair 19

internal NIBP components.

See the Propaq LT Service Manual

for the NIBP Characterization Procedure.

Show Info

NIBP:

Pump Test

HALL, ROBERT E.

3456187

12:41:32P

Adult,

Rm 239

Audible Alarms Silenced

Service:

NIBP

ECG

SpO2

USB

Radio

Software

Display

Battery

Voltages

Buttons

Characterize NIBP

Characterize NIBP after service to any

Exit

Service menus for repair and network troubleshooting

In addition to the service menus supporting functional verification, these menus support the following service procedures:

Characterize NIBP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19

Set LCD bias . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21

Check radio status. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21

Note

Before beginning any service procedure, read the entire procedure to verify that you have all tools and equipment needed and that you understand each step.

Characterize NIBP

NIBP characterization sets the volume constants for the NIBP system to assure proper cuff detection. You must characterize the NIBP system if any of the following occurs:

• Characterization test failure

• Pump failure

• Internal tubing replacement (any or all)

• Bleed valve, dump valve, or check valve replacement

• Main board replacement or repair

Caution Main board repair must be performed at the Welch Allyn Factory Service Center. Any change to the main board requires system testing, calibration, and verification, which can be done only at the Factory Service Center.

Caution Perform this characterization procedure only if you are prepared and equipped to perform the “Characterization test” on page 59. To complete this test, you must have the 35-ml test syringe described in “35-ml test volume” on page 71.

1. Attach a neonatal hose (008-0265-XX) to the monitor NIBP hose connector. Verify that

2. On the monitor, navigate to the Characterize NIBP screen.

the hose length is 8 feet ± 4 inches (2.44 meters ± 10 cm).

HR/min Setup Service NIBP Characterize NIBP.

HALL, ROBERT E.

Audible Alarms Silenced

Service: NIBP:

NIBP

ECG

Display

Show Info

Characterize NIBP after service to any

for the NIBP Characterization Procedure.

Battery

Pump Test

internal NIBP components.

See the Propaq LT Service Manual

3456187

Adult,

SpO2

USB

Voltages

Characterize NIBP

Exit

Rm 239

Radio Buttons

12:41:32P Software

20 Troubleshooting and repair Welch Allyn Propaq LT Vital Signs Monitor

without cuff to the Propaq LT.

2. Block the open end of the hose.

3. With the hose completely blocked,

Show Info

NIBP:

Pump Test

HALL, ROBERT E.

3456187

12:41:32P

Adult,

Rm 239

Audible Alarms Suspended

Service:

NIBP

ECG

SpO2

USB

Radio

Software

Display

Battery

Voltages

Buttons

Characterize NIBP

1. Connect a standard neonatal NIBP hose

Exit

Select ( ) to initialize NIBP characterization.

press the select button.

PROPER NEONATAL CUFF DETECTION.

Failure to perform the verification can result in

overinflation of neonatal cuffs.

Show Info

NIBP:

Pump Test

HALL, ROBERT E.

3456187

12:41:32P

Adult,

Rm 239

Audible Alarms Suspended

Service:

NIBP

ECG

SpO2

USB

Radio

Software

Display

Battery

Voltages

Buttons

Characterize NIBP

THE VERIFICATION TEST ASSURES

Exit

NIBP Characterized.

Perform verification procedure now.

3. Simultaneously press and to access the NIBP characterization service screens. A warning message appears: “NIBP characterization affects neonatal cuff detection.”

4. Press to continue. The first steps of the procedure appear:

HALL, ROBERT E.

Audible Alarms Suspended

Service: NIBP:

NIBP

ECG

Display

Show Info

1. Connect a standard neonatal NIBP hose

2. Block the open end of the hose.

3. With the hose completely blocked,

Select ( ) to initialize NIBP characterization.

Battery

Pump Test

without cuff to the Propaq LT.

press the select button.

Adult,

SpO2

Exit

3456187

USB

Voltages

Radio Buttons

12:41:32P Software

Rm 239

Characterize NIBP

5. Follow the steps as presented on the screen.

Note

The standard neonatal NIBP hose (008-0265-xx) can be effectively blocked with firm thumb pressure over the fitting opening.

Note

In this procedure, ‘the select button’ refers to .

6. Press to begin characterization.

When the characterization is complete, this screen appears:

HALL, ROBERT E.

Audible Alarms Suspended

Service: NIBP:

NIBP

ECG

Display

Show Info

THE VERIFICATION TEST ASSURES

PROPER NEONATAL CUFF DETECTION.

Failure to perform the verification can result in

Battery

Pump Test

NIBP Characterized.

Perform verification procedure now.

overinflation of neonatal cuffs.

Adult,

SpO2

Exit

3456187

USB

Voltages

Radio Buttons

12:41:32P Software

Rm 239

Characterize NIBP

7. Verify the characterization. (“Characterization test” on page 59.)

WARNING Always verify after characterization. Failure to verify a new characterization could result in overinflation of a neonatal cuff.

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