Service Manual
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Propaq LT Vital Signs Monitor ®
Service Manual Software version 1.3X
ii
Welch Allyn Propaq LT Vital Signs Monitor
Copyright 2007 Welch Allyn. All rights are reserved. No one is permitted to reproduce or duplicate, in any form, this manual or any part thereof without 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. ®
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Welch Allyn , Propaq , Acuity , FlexNet , Smartcuf , and Flexible Monitoring are registered trademarks of Welch Allyn. ParamSet™ is a trademark of Welch Allyn. Masimo®, SET®, LNOP®, and LNCS® are registered trademarks, and FastSATtm and APODtm 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 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
Australia 6129 638 3000 800 074 793
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
Reorder Part Number 810-1825-XX (CD) Reorder Part Number 810-2341-XX (Hardcopy) Manual Part Number 810-1827-01 Rev A, 03/2007 Welch Allyn 8500 SW Creekside Place Beaverton, Oregon 97008-7107 www.monitoring.welchallyn.com Printed in USA
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... 15 Service chart... 16 Service menus for repair and network troubleshooting... 18
4 - Disassembly and reassembly... 21 Procedures overview... 21 Procedures... 25
5 - Functional verification... 53 Functional verification overview... 53 Equipment required... 53 Procedures... 54 Checklist and test results report form... 64
6 - Replacement parts... 67 A - 35-ml test volume... 69 Index... 71
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. 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)
CAUTION
SENSITIVE ELECTRONIC DEVICES DO NOT SHIP OR STORE NEAR STRONG ELECTROSTATIC, ELECTROMAGNETIC, MAGNETIC OR RADIOACTIVE FIELDS.
ATTENTION OBSERVE PRECAUTIONS FOR HANDLING
ELECTROSTATIC SENSITIVE DEVICES
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. •
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.
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.
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2 Overview Purpose and scope This is a reference for periodic preventive maintenance and corrective service procedures for the Propaq LT monitor, Models 802LT0N, 802LTRN, 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 67. 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 For information on any of these services, call one of the numbers listed on page ii.
4
Overview
Welch Allyn Propaq LT Vital Signs Monitor
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 Communication Enabled
Top-Level Assembly
Serial # Prefix
802LT0N
ECG, NIBP, Nellcor SpO2
No
007-0160-XX
KA
802LTRN
ECG, NIBP, Nellcor SpO2
Yes
007-0161-XX
KA
802LT0S
ECG, NIBP, Masimo SpO2
No
007-0268-XX
KA
802LTRS
ECG, NIBP, Masimo SpO2
Yes
007-0269-XX
KA
Service Manual
Overview
5
Recommended service intervals Interval or condition
Action recommended
Procedure
Every 6 - 24 months (per hospital protocols)
Verify functionality
“Functional verification” on page 53
Every 36 months
Replace the air filter
“Replacing the air filter” on page 26
Every 36 months
Replace the battery
“Removing the lithium ion battery assembly” on page 25
The battery does not hold a charge
Check battery capacity Replace the battery
“Functional verification” on page 53 “Removing the lithium ion battery assembly” on page 25
The monitor has been dropped or otherwise damaged
Verify functionality
“Functional verification” on page 53
The monitor is not functioning properly
Verify functionality
“Functional verification” on page 53
The monitor does not pass the functional verification
Troubleshoot and repair, and then verify functionality
“Troubleshooting and repair” on page 9 “Disassembly and reassembly” on page 21 “Functional verification” on page 53
Return the monitor to an authorized “Returning products” on page 4 Welch Allyn service center
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. 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
Related documents Title
Reorder Number
Propaq LT Vital Signs Monitor Directions for Use
810-1828-XX
Welch Allyn Products and Accessories
810-0409-XX
Controls Monitor Power - Turn the monitor power on or off.
Down - Move the cursor down to the next display item.
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. Snapshot - Record a 21-second period of numeric and waveform data. Start/Stop NIBP - Start or stop an NIBP measurement.
Right - Move the cursor right to the next display item; increase the parameter value. Up - Move the cursor up to the next display item.
Cradle Monitor Release - Press and hold while removing the monitor from the cradle.
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 HALL, ROBERT E.
3456187 Adult,
II
. The setup menu appears.
3:00:06P
Rm 239
Setup Menu
1mV/cm
80 HR/min
.
140/78 12 NIBP mmHg (102) Resp/min
97 % SpO2
Setup: Alarms ECG NIBP Timings Configuration Service Suspend Audible Alarms:
Off
On
Alarm Tone
Low
Med
Exit
Trends
Snapshots
(90 sec) High Setup
3. Scroll right ( ) to highlight Service, and press NIBP and Show Info highlighted.
. The service menu appears, with
Service Manual
Overview
STEWART, ANN
7762940 Adult
II
3:00:06P
Rm ICU 263
1mV/cm
Service
%
HR/min NIBP mmHg Resp/min SpO2 Setup Alarms ECG NIBP Timings Configuration Service Select (
) to enter service menus
(qualified service personnel only).
Exit
Trends
Snapshots
Setup
7762940
3:00:06P
STEWART, ANN Adult
Rm ICU 263
Service NIBP ECG SpO2 USB Radio Software Display Battery Voltages Buttons NIBP Show Info NIBP Test Characterize Pump
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
SpO2
(none)
Show Info
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)
7
9
3 Troubleshooting and repair Troubleshooting chart...9 Battery use and care...15 Service chart...16 Service menus for repair and network troubleshooting...18
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 16 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 monitor to an authorized Welch Allyn Service Center for service. (See "Returning products" on page 4.)
“Recoverable Fault. Restart monitor.“
An invalid condition has been Restart the monitor. If the fault does not detected that might be resolved reappear, continue to use the monitor. by restarting the monitor.
“System Fault. Service monitor.“
An unrecoverable system error has occurred.
Send the monitor to an authorized Welch Allyn Service Center for service. (See "Returning products" on page 4.)
“System Fault. Service radio.“
Radio fault detected.
Send the monitor to an authorized Welch Allyn Service Center for service. (See "Returning products" on page 4.)
“Battery Fault. Install new battery.“
The battery is not performing to specification.
Install a new battery. "Removing the lithium ion battery assembly" on page 25.
Software error. Unexpected reset detected.
Charging has timed out (Charger Remove the monitor from the cradle and state 5). 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 25. “Equipment Alert. Charger Fault. Service Charger.“
Cradle power board failure.
Insert another monitor and battery pack in the cradle and verify that the symptoms persist. If yes, then replace the cradle power board. "Disassembling the cradle" on page 44.
10
Troubleshooting and repair
Symptom
Welch Allyn Propaq LT Vital Signs Monitor
Possible cause
Possible corrective action
Monitor fails to power up beyond the Button board not connected. initial screen.
Connect the button board to the main board. "Separating the top and bottom chassis halves" on page 27.
Monitor is in the cradle and does not The battery is discharged and power up, and the cradle power the cradle is not powering the indicator is off. monitor.
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.
Defective power adapter.
Replace the power adapter.
The charger input fuse is blown. Replace the fuse. "Replacing the fuse" on page 44. Monitor is latched in the cradle but does not power up. Power indicator on the cradle is on.
Open the monitor power switch. Replace the bottom chassis (which includes the power switch). "Removing the main board from the bottom chassis assembly" on page 32. Problem with the cradle power board.
Replace the cradle power board. "Disassembling the cradle" on page 44.
Problem with the monitor.
Send the monitor to an authorized Welch Allyn Service Center for service. (See "Returning products" on page 4.)
Monitor battery fails to charge. DC power is applied but the power indicator on the cradle remains off.
Blown power input fuse on the charger I/O panel.
Replace the fuse. "Replacing the fuse" on page 44.
Monitor battery run time duration is less than specified.
The battery is deficient.
Replace the battery. "Removing the lithium ion battery assembly" on page 25.
Radio cannot link up to the Acuity Central Station.
See "Radio" on page 12.
Yellow indicator on the cradle.
Monitor current draw is too Service the monitor or the cradle. high. Cradle circuit breaker is tripped. Charger state 1. Monitor has no battery pack. Charger state 4.
Install the monitor battery pack. "Removing the lithium ion battery assembly" on page 25.
Battery pack temperature is out of range. Charger state 3.
Return the battery pack to within the specified temperature range (0°C - 40°C).
Battery pack voltage is too low or the battery fuse is blown. Charger state 4.
Replace the battery pack. "Removing the lithium ion battery assembly" on page 25.
Battery pack fails to charge in the specified time. Charger state 5.
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 25.
Battery cell(s) over voltage; probably a charge imbalance. Charger state 7.
Replace the battery pack. "Removing the lithium ion battery assembly" on page 25.
Charger board failure.
Examine the cradle internal cabling, the cradle power board, and the interconnect board. "Removing the power/USB flex connector from the bottom chassis" on page 43.
Missing or erroneous LCD characters Faulty LCD.
Replace the LCD. "Disassembling the top chassis" on page 30.
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 30.
Voltages displayed on the service menu are out of range.
Main board fault.
Send the monitor to an authorized Welch Allyn Service Center for service. (See page ii.)
Repeated occurrence of “SpO2 Fault. The internal SpO2 connector is No sensor detected.“ loose.
Secure the internal SpO2 connector. "Removing the main board from the bottom chassis assembly" on page 32.
Faulty SpO2 connector panel.
Replace the connector panel. "Removing the patient connector panel from the bottom chassis" on page 42.
Worn O-ring in the NIBP hose connector.
Try a different NIBP hose or replace the O-ring.
Deficient NIBP check valve, bleed valve, or overpressure valve.
Replace the valve. "Removing the NIBP assembly from the main board" on page 38.
NIBP tubing not properly connected.
Connect the internal tubing. "Removing the NIBP assembly from the main board" on page 38.
The NIBP air leak exceeds the specification.
“Equipment Alert. NIBP Fault. Air leak. Check hose.“
If hoses and external fittings are Connect the internal tubing. "Removing the NIBP assembly from the main board" on not leaking, internal tubing page 38. might be disconnected.
Repeated occurrence of “NIBP Fault. Internal tubing is disconnected. Air leak. Check hose.“ Internal tubing is damaged.
Connect the internal tubing. "Removing the NIBP assembly from the main board" on page 38. Replace the damaged section of internal tubing. "Removing the NIBP assembly from the main board" on page 38.
“Equipment Alert. NIBP Fault. Kinked or neonate hose.“
If the correct hose is connected Verfify that the internal in-line NIBP pneumatic and not kinked, then the internal components are properly installed, with no pinching or kinking of tubing. "Removing the tubing might be blocked. NIBP assembly from the main board" on page 38.
“Equipment Alert. NIBP Fault. Overpressure condition.“
A transient pressure pulse was introduced into the cuff via sudden and excessive patient motion.
Restart the monitor.
“Equipment Alert. NIBP Fault. Calibrating. Please wait.“
An NIBP measurement was attempted within 45 seconds of monitor power-up.
Wait 45 seconds after turning on the monitor before starting an NIBP measurement.
An NIBP measurement was attempted while the NIBP system was performing a baseline calibration.
Wait 15 seconds and retry the NIBP measurement.
Excessive cuff artifact.
Reduce patient motion.
Excessive artifact. “Equipment Alert. NIBP Fault. NIBP subsystem failure. Service required. NIBP disabled.“ The NIBP system self-test has failed 3 times without passing.
Minimize patient motion.
“Calibrating. Minimize motion.“
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 This radio troubleshooting guide applies to issues specific to the Propaq Model 802 LTRN and 802 LTRS monitors and 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.
Wireless communication disabled Use the configuration utility to enable wireless in the monitor configuration. communication for the monitor.
No Acuity connection-network Monitor is out of radio range. communication icon with slash ( ) (RSSI > approx. 60.) is displayed on the monitor screen Netname (ESSID) set wrong. and the yellow indicator above the screen is lit.
Move the monitor within range of an Acuity access point. (RSSI < approx. 60.)
USB connected to the monitor through the cradle.
Disconnect the USB cable from the cradle.
Set the monitor network name to the Acuity network name. (Default: com.protocol.)
No Acuity connection-network Monitor is intentionally Use the monitor interface to connect to the communication icon with slash ( ) disconnected from the network by network. and “Disconnected” are displayed the user. on the monitor screen, and the green indicator above the screen is flashing. Radio Monitoring service screen persistently displays “Searching for access point.”
Monitor radio cannot find a signal Move the monitor within range of a network from the network. access point. Verify the Netname.
Radio Monitoring service screen DHCP server is down. persistently displays “Requesting an IP address.” DHCP server has no more addresses.
Contact Welch Allyn Acuity technical support. (See page ii.)
Radio Monitoring service screen persistently displays “Contacting Acuity.”
All Acuity systems with wireless are unavailable.
Wait.
The Acuity system is at capacity for licenses.
Turn off another wireless monitor.
Frequent communication faults with no apparent cause. On the Radio Monitoring service screen, TX Retries and RX CRC 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.
Contact Welch Allyn Acuity technical support. (See page ii.)
Service Manual
Troubleshooting and repair
13
Battery states and service State
Description
Type of State
Possible Corrective Action
0
Battery state unknown.
Normal transitory. Should not persist.
If the state persists, replace the battery pack. "Removing the lithium ion battery assembly" on page 25.
1
Battery voltage too high. Fault-possible cell imbalance Replace the battery pack ("Removing the (Indication can occur with the or charger fault lithium ion battery assembly" on page 25) monitor in or out of the cradle.) or the cradle power board ("Disassembling the cradle" on page 44).
2
Battery fully charged.
Normal operating state.
3
Battery partially charged.
Normal operating state.
4
30 minutes of charge remaining, undocked.
Normal operating state.
5
30 minutes of charge remaining, docked.
Normal transitory state.
6
5 minutes of charge remaining, undocked.
Normal operating state.
7
5 minutes of charge remaining, docked.
Normal transitory state.
8
Battery is exhausted, undocked.
Normal operating state.
9
Battery is exhausted, docked.
Normal operating state.
10
Battery voltage is too low for recharging, docked.
Faulty battery pack.
Replace the battery pack. "Removing the lithium ion battery assembly" on page 25.
14
Troubleshooting and repair
Welch Allyn Propaq LT Vital Signs Monitor
Charger states and service State Description
Charger Charger Type of State Status Power LED LED
Possible Corrective Action
0
Charger state unknown.
n/a
n/a
Normal initial transitory state of very short duration.
n/a
1
Monitor docked, No-power fault.
Off
Off
Normal operating state when the monitor is in the cradle and the cradle is not powered.
If the power adapter is not connected, connect it.
Fault state if the cradle fuse is open.
Replace the fuse. "Replacing the fuse" on page 44.
Yellow
On
Fault-power to the monitor Attempt to recharge by removing automatically disconnected by the the monitor from the cradle and cradle. Possible monitor fault. 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. Fault-no monitor in the cradle, power input and input fuse OK.
Power board fault. Replace the power board. "Disassembling the cradle" on page 44.
2
Monitor docked, charging.
Green
Green
Normal operating state.
n/a
3
Monitor docked, temperature fault.
Yellow
Green
Fault-battery pack temperature is out of range high or low.
Bring the battery pack temperature into specified range (0° C - 40° C).
4
Monitor docked, battery voltage too low for charging.
Yellow
Green
Fault-battery pack can no longer Replace the battery pack. be charged. "Removing the lithium ion battery assembly" on page 25.
5
Monitor docked, timeout fault.
Yellow
Green
Fault-Battery pack failed to charge within the specified time.
Attempt again to charge by removing the monitor from the cradle and reinserting the monitor in the cradle. Replace the battery pack. "Removing the lithium ion battery assembly" on page 25.
6
Monitor docked, charging complete.
Off
Green
Normal operating state.
n/a
7
Monitor docked, overcharge fault.
Yellow
Green
Fault-battery pack cells are unbalanced or the cradle is faulty.
Replace the battery pack ("Removing the lithium ion battery assembly" on page 25). Replace the power board in the cradle ("Disassembling the cradle" on page 44).
8
Monitor not docked.
n/a
n/a
Normal operating state.
n/a
Service Manual
Troubleshooting and repair
15
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
16
Troubleshooting and repair
Welch Allyn Propaq LT Vital Signs Monitor
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. 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.
Monitor Service
Action
Replace the NIBP air filter.
"Replacing the air filter" on page 26.
Replace the battery pack.
"Removing the lithium ion battery assembly" on page 25.
Replace the connector panel
1. "Removing the patient connector panel from the bottom chassis" on page 42. 2. "Functional verification" on page 53.
Replace the LCD assembly
1. "Disassembling the top chassis" on page 30. 2. "Set LCD bias" on page 20 3. "Functional verification" on page 53.
Replace the top case assembly (with button board and window)
1. "Disassembling the top chassis" on page 30. 2. "Functional verification" on page 53.
Replace the bottom case assy (with power switch, power flex cable, and connector panel)
1. "Removing the main board from the bottom chassis assembly" on page 32. 2. "Functional verification" on page 53.
Replace the NIBP pump, bleed and dump valves, check valve, or internal tubing
1. "Removing the NIBP assembly from the main board" on page 38. 2. "Characterize NIBP" on page 18. 3. "Functional verification" on page 53.
Update the software
Send the monitor to a Welch Allyn service center. (See "Returning products" on page 4.)
Replace the main board
Send the monitor to a Welch Allyn service center. (See "Returning products" on page 4.)
Service Manual
Troubleshooting and repair
Cradle Service
Action
Replace the fuse
1.
Replace the interconnect board
1. "Disassembling the cradle" on page 44. 2. "Functional verification" on page 53.
Replace the power board
1. "Disassembling the cradle" on page 44 2. "Functional verification" on page 53.
Replace the I/O panel
1. "Disassembling the cradle" on page 44 2. "Functional verification" on page 53.
Replace the upper housing
1. "Disassembling the cradle" on page 44 2. "Functional verification" on page 53.
Replace the lower housing
1. "Disassembling the cradle" on page 44 2. "Functional verification" on page 53.
"Replacing the fuse" on page 44.
17
18
Troubleshooting and repair
Welch Allyn Propaq LT Vital Signs Monitor
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...18 Set LCD bias...20 Check radio status...20 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 69.
1.
Attach a neonatal hose (008-0265-XX) to the monitor NIBP hose connector. Verify that the hose length is 8 feet ± 4 inches (2.44 meters ± 10 cm).
2. On the monitor, navigate to the Characterize NIBP screen. HR/min
Setup
HALL, ROBERT E.
Audible Alarms Silenced
Service 3456187
Adult,
NIBP
Rm 239
Characterize NIBP.
12:41:32P
Service: NIBP ECG SpO2 USB Radio Software Display Battery Voltages Buttons NIBP: Show Info Pump Test Characterize NIBP Characterize NIBP after service to any internal NIBP components. See the Propaq LT Service Manual for the NIBP Characterization Procedure.
Exit
3. Simultaneously press and to access the NIBP characterization service screens. A warning message appears: “NIBP characterization affects neonatal cuff detection.”