Welch Allyn Propaq LT 802LTAN User manual

Propaq
®
LT
Vital Signs Monitor
Service Manual
Software version 1.5X or later

ii Welch Allyn Propaq LT Vital Signs Monitor
© 2011 Welch Allyn. All rights are reserved. To support the intended use of the product described in this publication, the purchaser of
the product is permitted to copy this publication, for internal distribution only, from the media provided by Welch Allyn. No other use,
reproduction, or distribution of this publication, or any part of it, is permitted without written permission from Welch Allyn
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 SpO2-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
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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
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For information about any Welch Allyn product, call the nearest Welch Allyn representative:
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
DIR 810-2713-01 A
www.welchallyn.com
Printed in USA
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Welch Allyn, Inc.
8500 SW Creekside Place
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Regulatory Affairs Representative
Welch Allyn Limited
Navan Business Park
Dublin Road, Navan
County Meath, Republic of Ireland

iii
Contents
1 - Safety summary .........................................1
Warnings........................................................1
General safety considerations .......................................1
Electrostatic discharge (ESD) ........................................2
Symbols ........................................................2
2 - Overview ...............................................3
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

1
1
Safety summary
All users of the monitor must read this safety summary and all warning and caution
statements in the manual.
Warnings
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.
WARNING Use only accessories approved by Welch Allyn. Visit
www.welchallyn.com. The use of any other accessories can result in inaccurate
patient data, can damage the equipment, and can void your product warranty.
WARNING Always use accessories according to the standards of your facility
and according to the manufacturer's directions.
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.

2Safety summary Welch Allyn Propaq LT Vital Signs Monitor
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 (810-2713-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.
Electrostatic discharge (ESD)
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.
• 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.
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.
ATTENTION
OBSERVE PRECAUTIONS
FOR HANDLING
ELECTROSTATIC
SENSITIVE DEVICES
CAUTION
SENSITIVE ELECTRONIC DEVICES
DO NOT SHIP OR STORE NEAR STRONG
ELECTROSTATIC, ELECTROMAGNETIC,
MAGNETIC OR RADIOACTIVE FIELDS.

Service Manual Safety summary 3
Symbols
WARNING Indicates conditions that could lead to illness, injury, or death.
Caution In this manual, indicates conditions that could damage equipment or other property.

4Safety summary Welch Allyn Propaq LT Vital Signs Monitor

2
5
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 71.
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
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.)

6Overview 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.
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.
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.
Note Welch Allyn does not accept returned products without an RMA.
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.