Welch Allyn ELI 150 User manual

ELI 150 Service Manual

Manufactured by Welch Allyn, Inc. Skaneateles Falls, NY U.S.A

CAUTION: Federal law restricts this device to sale by or on the order of a physician

this document

may be transmitted, reproduced, used, or disclosed outside of the receiving organization without the

express written

consent of Welch Allyn, Inc. Welch Allyn is a registered trademark of Welch Allyn, Inc. AM12,

ELI,

VERITAS, and WAM are trademarks of Welch Allyn, Inc. DICOM is the registered trademark of the

National Electrical Manufacturers Association for its standards publications relating to digital communications of

medical information. Software V2.4.1 2019-01

For patent information, please visit www.welchallyn.com/patents

For information about any Welch Allyn product, visit: https://www.welchallyn.com/en/about-us/locations.html

Customer Service and Technical Support: https://www.welchallyn.com/en/other/contact-us.html 1.888.667.8272,

mor_tech.suppor[email protected]

9516-175-50-ENG Rev B

Revision date: 2019-09

N/A ELECTROCARDIOGRAPH

EU IMPORTER

Welch Allyn, Inc.

4341 State Street Road

Skaneateles Falls, NY 13153 USA

www.welchallyn.com

Welch Allyn Limited

Navan Business Park, Dublin Road,

Navan, Co. Meath C15 AW22

Ireland

iv

Notices

Manufacturer’s Responsibility

Mortara Instrument, Inc., is responsible for the effects on safety and performance only if:

•

Assembly operations, extensions, readjustments, modifications or repairs are carried out only by persons authorized by Mortara Instrument,

Inc.

•

The device (ELI 150) is used in accordance with the instructions for use.

Responsibility of the Customer

The user of this product is responsible for ensuring the implementation of a satisfactory maintenance schedule. Failure to do so may cause

undue failure and possible health hazards.

Equipment Identification

Mortara Instrument, Inc. equipment is identified by a serial and reference number on the back of the device. Care should be taken so that

these numbers are not defaced.

Copyright and Trademark Notices

This document contains information that is protected by copyright. All rights are reserved. No part of this document may be photocopied,

reproduced or translated to another language without prior written consent of Mortara Instrument, Inc.

Other Important Information

The information in this document is subject to change without notice.

Mortara Instrument, Inc. makes no warranty of any kind with regard to this material including, but not limited to, implied warranties of

merchantability and fitness for a particular purpose. Mortara Instrument, Inc. assumes no responsibility for any errors or omissions that may

appear in this document. Mortara Instrument Inc. makes no commitment to update or to keep current the information contained in this

document.

iii

Warranty Information

Your Mortara Warranty

MORTARA INSTRUMENT, INC. (hereinafter referred to as “Mortara”) hereby warrants that Mortara products (hereinafter

referred to as “Products”) shall be free from defects in material and workmanship under normal use, service and maintenance

for the warranty period of such Product from Mortara or an authorized distributor or representative of Mortara. Normal use,

service and maintenance means operation and maintenance in accordance with appropriate instructions and/or information

guides. This Warranty does not apply to damage to the Products caused by any or all of the following circumstances or

conditions:

a) Freight damage;

b) Parts and/or accessories of the Products not obtained from or approved by Mortara;

c) Misapplication, misuse, abuse and failure to follow the Product instruction sheets and/or information guides;

d) Accident, a disaster affecting the Products;

e) Alterations or modifications to the Products not authorized by Mortara;

f) Other events outside of Mortara’s reasonable control or not arising under normal operating conditions.

THE REMEDY UNDER THIS WARRANTY IS LIMITED TO THE REPAIR OR REPLACEMENT WITHOUT CHARGE

FOR LABOR OR MATERIALS, OR ANY PRODUCTS FOUND UPON EXAMINATION BY MORTARA TO HAVE

BEEN DEFECTIVE. This remedy shall be conditioned upon receipt of notice by Mortara of any alleged defects promptly after

discovery thereof within the warranty period. Mortara’s obligations under the foregoing warranty will further be conditioned

upon the assumption by the purchaser of the Products (i) of all carrier charges with respect to any Products returned to

Mortara’s principal place or any other place as specifically designated by Mortara or an authorized distributor or representative

of Mortara, and (ii) all risk of loss in transit. It is expressly agreed that the liability of Mortara is limited and that Mortara does

not function as an insurer. A purchaser of a Product, by its acceptance and purchase thereof, acknowledges and agrees that

Mortara is not liable for loss, harm or damage due directly or indirectly to an occurrence or consequence therefrom relating to

the Products. If Mortara should be found liable to anyone under any theory (except the expressed warranty set forth herein) for

loss, harm or damage, the liability of Mortara shall be limited to the lesser of the actual loss, harm or damage, or the original

purchase price of the Product when sold.

EXCLUDED FROM THE LIMITED WARRANTY SET FORTH ABOVE ARE CONSUMABLE ITEMS SUCH AS PAPER,

BATTERIES, ELECTRODES, PATIENT CABLES, LEAD WIRES AND MAGNETIC STORAGE MEDIUMS.

EXCEPT AS SET FORTH HEREIN WITH RESPECT TO REIMBURSEMENT OF LABOR CHARGES, A PURCHASER’S

SOLE EXCLUSIVE REMEDY AGAINST MORTARA FOR CLAIMS RELATING TO THE PRODUCTS FOR ANY AND

ALL LOSSES AND DAMAGES RESULTING FROM ANY CAUSE SHALL BE THE REPAIR OR REPLACEMENT OF

DEFECTIVE PRODUCTS TO THE EXTENT THAT THE DEFECT IS NOTICED AND MORTARA IS NOTIFIED WITHIN

THE WARRANTY PERIOD. IN NO EVENT, INCLUDING THE CLAIM FOR NEGLIGENCE, SHALL MORTARA BE

LIABLE FOR INCIDENTAL, SPECIAL OR CONSEQUENTIAL DAMAGES, OR FOR ANY OTHER LOSS, DAMAGE OR

EXPENSE OF ANY KIND, INCLUDING LOSS OF PROFITS, WHETHER UNDER TORT, NEGLIGENCE OR STRICT

LIABILITY THEORIES OF LAW, OR OTHERWISE. THIS WARRANTY IS EXPRESSLY IN LIEU OF ANY OTHER

WARRANTIES, EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO THE IMPLIED WARRANTY OF

MERCHANT ABILITY AND THE WARRANTY OF FITNESS FOR A PARTICULAR PURPOSE.

iv

User Safety Information

Warning:

Means there is the possibility of personal

injury to you or others.

Caution:

Means there is the possibility of damage to

the equipment.

Note: Provides information to further assist in the

use of the device.

Federal law restricts this device for sale to or on the order of a physician.

 Device (electrocardiograph, Class I) captures and presents data reflecting a patient’s physiological condition that when

reviewed by a trained physician or clinician can be useful in determining a diagnosis. However, the data should not be

used as a sole means for determining a patient’s diagnosis.

 To ensure that electrical safety is maintained during operation from AC (~) power, the device must be plugged into a

Hospital Grade outlet.

 To maintain designed operator and patient safety, peripheral equipment and accessories used that can come in direct patient

contact, must be in compliance with UL 2601-1, IEC 601-1 and IEC 601-2-25.

 Patient cables intended for use with the ELI 150 include series resistance (9 Kohm minimum) in each lead for defibrillation

protection. Patient cables should be checked for cracks or breakage prior to use.

 Conductive parts of the patient cable, electrodes and associated connections of Type CF applied parts, including the neutral

conductor of the patient cable and electrode should not come into contact with other conductive parts, including earth

ground.

 To maintain designed operator and patient safety, only use parts and accessories supplied with the device and available

through Mortara Instrument, Inc.

 ECG electrodes could cause skin irritation and should be examined for signs of irritation or inflammation.

 To prevent possible infection, single use components (e.g., electrodes) should be limited to one-time use only.

 To avoid the possibility of serious injury or death during patient defibrillation, do not come into contact with device or

patient cables. Additionally, proper placement of defibrillator paddles in relation to the electrodes is required to minimize

harm to the patient.

 A possible explosion hazard exists; do not use the device in the presence of flammable anesthetics.

 Before attempting to use the device for clinical applications the operator must read and understand the contents of the

manual and any documents accompanying the device.

 Where the integrity of external protective earth conductor arrangement is in doubt, the ELI 150 shall be operated from its

internal electrical power source.

Warning(s)

v

 All signal input and output (I/O) connectors are intended for connection of only devices complying with IEC 60601-1, or

other IEC standards (e.g. IEC 60950), as appropriate to the device. Connecting additional devices to the ELI 150 may

increase chassis and/or patient leakage currents. To maintain operator and patient safety, consideration should be given to

the requirements of IEC 60601-1-1, and leakage currents should be measured to confirm no electric shock hazard exists.

 The ELI 150 has not been designed for use with high-frequency (HF) surgical equipment and does not provide a protective

means against hazards to the patient.

 The quality of the signal produced by the electrocardiograph may be adversely affected by the use of other medical

equipment, including but not limited to defibrillators and ultrasound machines.

 The ELI 150 uses a lead-acid gel cell battery. Disposal of this battery must be in compliance with governmental

regulations.

 This unit can operate using AC power. Caution should be taken when working on this unit to limit the exposure to high

voltages. The unit should not be connected to AC power and the battery fuse should be removed when replacing any

assembly of this unit.

vi

 To prevent possible damage to the keypad, do not use sharp or hard objects to depress keys, only use fingertips.

 Do not attempt to clean the device or patient cables by submersing into a liquid, autoclaving, or steam cleaning. Wipe the

exterior surfaces with a warm water and mild detergent solution and then dry with a clean cloth.

 No user serviceable parts inside. Screw removal by qualified service personnel only.

 The rechargeable internal battery is a sealed lead acid type and it is totally maintenance free. If the battery appears to

become defective, refer to Mortara Instrument Service Department.

 Do not pull or stretch patient cables as this could result in mechanical and/or electrical failures. Patient cables should be

stored after forming them into a loose loop.

Notes

 Excessive patient movement could interfere with the operation of the device.

 Proper patient preparation is important to proper application of ECG electrodes and operation of the device.

 There is no known safety hazard if other equipment, such as pacemakers or other stimulators, are used simultaneously with

the ELI 150; however, disturbance to the signal may occur.

 If the ECG amplifier input is out of normal operating range, the display will indicate a lead fail for the lead(s) where this

condition is present and if the signal is being printed, the respective lead(s) will print out as a square wave.

Caution(s)

vii

 As defined by IEC 60601-1 and IEC 60601-2-25, the device is classified as follows:

 Class I equipment or internally powered

 Type CF applied parts

 Ordinary equipment

 Not suitable for use in the presence of flammable anesthetics

 Continuous operation

NOTE: From a safety perspective, per IEC 60601-1 and derivative standards / norms, this unit is declared to be

“Class I” and uses a three-prong inlet to ensure an earth connection is made along with mains. The ground terminal

on the mains inlet is the only protective earth point in the unit. Exposed metal accessible during normal operation is

double insulated from mains. Internal connections to earth ground are functional earth.

 The ELI 150 will automatically turn off (blank screen) if the batteries have been severely discharged.

 After operating the ELI 150 using battery power, always reconnect the power cord. This ensures that the batteries will be

automatically recharged for the next time you use the ELI 150. A light will illuminate, next to the on/off switch, indicating

that the unit is charging.

 The ELI 150 is a UL Classified Device:

WITH RESPECT TO ELECTRIC SHOCK,

FIRE AND MECHANICAL HAZARDS ONLY IN ACCORDANCE WITH

UL2601-1, IEC60601-1, CAN/CSA CC22.2 No. 601.1, AND

IEC60601-2-25

viii

ix 
 
 
1 
Table of Contents 
General 
Service Manual Purpose ....................................................................................................... 1-1 
User Safety Information ......................................................................................................... 1-1 
Periodic Safety Inspections ...................................................................................... 1-1 
Proper Power Cord ................................................................................................... 1-1 
Proper Fuse .............................................................................................................. 1-1 
Do Not Operate in Explosive Atmospheres .............................................................. 1-1 
Use Only Safe Methods of Interconnection .............................................................. 1-1 
Do Not Mount Product above Patient ....................................................................... 1-1 
Recommended Accessories ..................................................................................... 1-1 
Sterilizing this Product .............................................................................................. 1-2 
Liquid Spills............................................................................................................... 1-2 
Product Information .................................................................................................. 1-2 
Manual Symbol Delineation ...................................................................................... 1-2 
Maintenance and Cleaning 
Introduction (Maintenance and Cleaning) ............................................................................. 2-1 
Recommended Cleaning Supplies ........................................................................................ 2-1 
Equipment Required .............................................................................................................. 2-1 
Cleaning and Inspection Techniques .................................................................................... 2-2 
Interior Cleaning .................................................................................................................... 2-2 
Printed Circuit Board Cleaning .............................................................................................. 2-2 
Metallic and Plastic Parts Cleaning ....................................................................................... 2-3 
Exterior Cleaning ................................................................................................................... 2-3 
Printhead Cleaning ................................................................................................................ 2-3 
Inspection of Writer Assembly Harness................................................................................. 2-3 
Exterior Inspection ................................................................................................................. 2-4 
Interior Visual Inspection ....................................................................................................... 2-4 
Preventive Maintenance Schedule ........................................................................................ 2-4 
System Settings 
Access Configuration Menu for the ELI 250 .......................................................................... 3-1 
Summary of Configuration Menus ......................................................................................... 3-3 
Configuration Page 1 ............................................................................................................. 3-7 
Software Version.......................................................................................................... 3-7 
Cart Number ................................................................................................................ 3-7 
Site Number ................................................................................................................. 3-7 
Telephone Number ...................................................................................................... 3-7 
Language ..................................................................................................................... 3-8 
Volume ......................................................................................................................... 3-8 
Battery Timeout ............................................................................................................ 3-8 
Configuration Page 2 ........................................................................................................... 3-9 
Flash Size .................................................................................................................... 3-9 
ID Format ..................................................................................................................... 3-9 
Auto-Fill ........................................................................................................................ 3.9 
AC Filter ....................................................................................................................... 3-9 
Paper Speed ................................................................................................................ 3-10 
Filter ............................................................................................................................. 3-10 
Height/Weight Units ..................................................................................................... 3-10 
Date Format ................................................................................................................. 3-10 
3 
2 

x

Interpretation Option .................................................................................................... 3.10

Reasons ....................................................................................................................... 3-10

Configuration Page 3 ........................................................................................................... 3-11

Append ......................................................................................................................... 3-11

Number of Copies ........................................................................................................ 3-11

ECG Retrieved ............................................................................................................. 3-11

Delete Rule .................................................................................................................. 3-11

Storage Sensitivity ....................................................................................................... 3-12

Auto Save ECG ............................................................................................................ 3-12

Auto Print ECG ............................................................................................................ 3-12

Baud Rate .................................................................................................................... 3-12

Caps Lock .................................................................................................................... 3-12

Configuration Page 4 ........................................................................................................... 3-12

Rhythm Formats .......................................................................................................... 3-12

Configuration Page 5 ........................................................................................................... 3-13

Plot Format .................................................................................................................. 3-13

Rhythm Leads .............................................................................................................. 3-13

Configuration Page 6 ........................................................................................................... 3-14

XMT Media ................................................................................................................... 3-14

DHCP ........................................................................................................................... 3-14

IP Address ................................................................................................................... 3-14

Def Gateway ................................................................................................................ 3-14

Sub Net Mask .............................................................................................................. 3-14

Host IP ......................................................................................................................... 3-14

Port Number ................................................................................................................. 3-15

Assembly/Disassembly of Unit

Fuse Removal ........................................................................................................................ 4-1

Cover Assembly Removal ..................................................................................................... 4-3

Battery Removal .................................................................................................................... 4-9

Keyboard/LCD Removal ........................................................................................................ 4-11

Writer Removal/Installation .................................................................................................... 4-15

Printhead Removal/Installation .............................................................................................. 4-19

Writer Motor Removal/Installation ......................................................................................... 4-23

Writer Door Removal/Installation ........................................................................................... 4-25

Printed Circuit Board Assembly Removal/Installation ........................................................... 4-29

Front End Board Removal/Installation ................................................................................... 4-33

4

xi

Technical Description

Introduction ............................................................................................................................ 5-1

ELI 250/210 Block Diagram ................................................................................................... 5-2

Main System Board ............................................................................................................... 5-3

Front End Board .................................................................................................................... 5-3

Patient Input. .......................................................................................................................... 5-4

ELI 250/210 Specifications .................................................................................................... 5-5

Parts List ................................................................................................................................ 5-6

Troubleshooting and Testing

Introduction ............................................................................................................................ 6-1

Troubleshooting ..................................................................................................................... 6-1

AC Power, Backlight on, Nothing on Display ............................................................... 6-1

With AC On, Nothing on Display .................................................................................. 6-1

Unit Works on AC but not on Battery ........................................................................... 6-1

Unit turns on, No waveform on screen but Function Keys Displayed .......................... 6-2

No Keyboard Functions and Display Frozen ............................................................... 6-2

RS232 Transmit / Receive Problems ........................................................................... 6-2

Optional Modem Transmit / Receive Problems ........................................................... 6-3

Testing ................................................................................................................................... 6-4

Power Supply Test ....................................................................................................... 6-4

Keyboard test ............................................................................................................... 6-4

LCD Test ...................................................................................................................... 6-4

Speaker Test ................................................................................................................ 6-5

Date / Time Test .......................................................................................................... 6-6

Writer Test ................................................................................................................... 6-6

Writer Test Description ........................................................................................ 6-7

Adjusting the Writer Cue Sensor ................................................................................. 6-8

ECG Test ..................................................................................................................... 6-8

Noise Test .................................................................................................................... 6-9

Lead Fail Test .............................................................................................................. 6-10

Transmitting Records ................................................................................................... 6-11

Serial Port Test ................................................................................................... 6-12

Modem Test ....................................................................................................... 6-12

Modem Initialization.................................................................................. 6-12

Country Codes ......................................................................................... 6-14

Receive ECGs .................................................................................................... 6-14

WLAN Test ......................................................................................................... 6-15

Safety Test ......................................................................................................... 6-16

Connectivity Options

Introductions .......................................................................................................................... 7-1

RS232/Serial Connectivity Option ............................................................................... 7-1

Modem Connectivity Option ......................................................................................... 7-1

LAN Connectivity Option .............................................................................................. 7-2

GSM Modem Connectivity Option ............................................................................... 7-3

7

6

5

xii

Section 1

1-1

General

Service Manual Purpose

The purpose of this manual is to supply information to service personnel so they can maintain the ELI 150

Interpretive and Non-Interpretive Electrocardiograph at the assembly and subassembly level. Although the manual

includes parts lists, mechanical assembly parts, and printed circuit board information, it is intended to function

primarily as a guide to preventative and corrective maintenance and electrical repairs considered field repairable.

User Safety Information

Periodic Safety Inspections

Follow the recommended maintenance schedule. Inspect the power cord and transmission cables

periodically for fraying or other damage and replace as needed. Broken or frayed wires may cause

interference or loss of signal. Pay particular attention to points where wires enter connectors.

Proper Power Cord

Use only the power cord specified for the equipment. This product requires a three-wire, (18 gauge, SJT-

grade) power cord, which is supplied with a three-terminal, polarized plug (hospital grade) for connection

to the power source and protective ground. Use only a power outlet with a protective ground outlet. An

interruption of the grounding connection could cause an electrical shock hazard.

Proper Fuse

Use only the fuse specified for the equipment (identical in type, voltage and current rating). Substituting a

different fuse type could cause a fire hazard. Always make sure fuses have been installed before operating

the unit.

Do Not Operate in Explosive Atmospheres

Do not operate the ELI 150 in the presence of flammable gasses or anesthetics; this environment could

cause an explosion. Refer to Operator's Manual Safety Information: Warning(s) and Caution(s).

Use Only Safe Methods of Interconnection

To prevent electrical shock from the product when it is connected to other electrical equipment, proper

grounding is essential. Refer to Operator's Manual Safety Information: Warning(s) Peripheral equipment.

Do Not Mount Product above Patient

Do not mount or place the product where it could fall on a patient or where it could be accidentally knocked

off a shelf or other mounting arrangement.

Recommended Accessories

For the patient's safety and optimum equipment performance, use only the accessories specified by Mortara

Instrument, Inc.

1

ELI 150

1-2

Sterilizing this Product

Do not sterilize this product or any accessories unless specifically directed by the manufacturer. Sterilization and

sterilization environments can seriously damage many components and accessories.

Liquid Spills

Do not set beverages or other liquids on or near the ELI 150, and/or optional equipment.

Product Information

See Section 1 of Operator's Manual

Manual Symbol Delineation

Electrostatic sensitive devices

Caution or Special Instructions

Dispose of items in an environmentally

appropriate fashion.

Section 2

2-1

Maintaining and Cleaning

Introduction

This section provides servicing and maintenance instructions for the ELI 150 interpretive electrocardiograph.

Subsequent parts of this section are disassembly, inspection techniques, cleaning techniques, and installation.

Recommended Cleaning Supplies



Anti-static mat & wrist band, properly grounded



Clean, lint-free cloth



Hospital grade germicidal solution



DRY, low pressure, compressed air (30 psi)



Electronic safe non-residue solvent, such as Flux-off



Masking tape



Non-metallic, soft-bristle brush



Naphtha



Vacuum cleaner, Static Safe

Equipment Required



Screwdriver Philips #2.



Allen Wrench 0.05 inch or a 1.25 mm



Vibra-Tite or similar product to prevent screws from vibrating loose.



Digital Multi Meter (DMM)

Note: The equipment and solvent mentioned above are standard shop commodities that are available from

commercial sources. If in the performance of normal maintenance or repair, the PCB assembly, AC

connector assembly, or writer assemblies are removed or replaced, a leakage test should be performed.

See section on testing.

2

CAUTION:

Remove battery fuse before attempting any disassembly.

Removal of the battery fuse will not cause a loss of ECGs or of the configuration. This

information is stored in FLASH memory.

ELI 150

2-2

Cleaning and Inspecting Techniques

This section contains instructions for periodic cleaning and inspection of the instrument as preventative maintenance

measures. It also contains specific cleaning procedures to be conducted after disassembly. Parts having identical

cleaning procedures are grouped under common headings. No special tools are required.

Interior Cleaning

Printed Circuit Board Cleaning

The printed circuit board assemblies in the ELI 150 system contain static sensitive devices. Use special handling

procedures to prevent damage due to ESD.

Clean assembled parts with a vacuum cleaner or low pressure compressed air (30 psi). Take care when cleaning

printed circuit boards that wires or component leads are not bent back and forth in such a manner as to weaken them

and cause them to eventually break.

Dry with low pressure compressed air.

WARNING

Ventilate work area thoroughly when using solvents. Observe manufacturers warnings on

solvent containers with regard to personnel safety and emergency first aid. Be sure that first

aid equipment is available before using chemicals. Observe all shop safety and fire

precautions.

Section 2

2-3

Metallic and Plastic Parts Cleaning

Brush all surfaces and parts with a nonmetallic, soft bristle brush.

Wipe metal surfaces with soft, nonabrasive cloth dampened with isopropyl alcohol.

Dry surfaces with clean cloth.

Wipe surfaces of nameplates and labels with dry cloth.

Exterior Cleaning

Use a damp cloth to clean external covers and the line cord. Use a Hospital grade germicidal solution.

Printhead Cleaning

Open the writer cover as explained in the section on final assembly.

Apply isopropyl alcohol to a clean cloth, and wipe the writer printhead until all foreign matter is removed.

Dry the printhead thoroughly before use. Use a dry clean cloth for this.

After cleaning is completed, inspect the unit using the techniques described previously.

After the inspection is complete, install the cover as explained in the section on final assembly.

Inspection of Writer Assembly Harness

Visually inspect the wire harnesses for wear, maintenance damage, corrosion, deterioration, and damage resulting

from dropping.

If no defects are found, install the cover and restore the unit to service.

If a defect is found in the cables, replace the damaged cable with a new cable.

CAUTION

Do not wipe over surfaces of nameplates or labels with abrasive cleaners or materials,

as this will eventually wear away the nameplate information. Do not use solvents to

clean plastic parts.

ELI 150

2-4

Exterior Inspection

Visually inspect the entire instrument for wear, maintenance damage, corrosion, deterioration, and damage resulting

from dropping.

Interior Visual Inspection

Check all connectors for loose, bent or corroded contact points

Check wire, harnesses and cables for signs of wear or deterioration.

Inspect components and their leads for security of mounting, deterioration or leakage.

Check terminals and connections for proper installation, failed soldering, loss or wear.

Inspect PCB surfaces for charring, cracking or brittleness.

Note: Some degree of discoloration of the PCB surface may be expected due to continued exposure to the

operating temperatures of some of the components.

Check the identification nameplate and other decals for legibility.

Inspect chassis, covers, and brackets for warping, bending, surface damage or missing captive hardware.

Check all screws and nuts for tightness or signs of stripped or crossed threads.

Check for any other form of mechanical damage, which may indicate a failure.

If, during the process of normal maintenance or repair, the PCB assembly, AC connector assembly, or writer

assembly are removed and replaced, perform the leakage test as describe in the section on Testing and

Troubleshooting.

Preventative Maintenance Schedule:

Maintenance to be Performed

Period

Notes

Clean and inspect unit.

Printhead cleaning

Leakage tests.

6 mo.

80 hrs

-

Perform every 3 mo. if unit is in heavy use.

Monthly cleaning recommended

As required by facility or regulatory requirements.

Table 1

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Welch Allyn ELI 150 User manual

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