Schiller AT-102 How to use

i
Article Number 2. 540 028
SCHILLER AG 2002
Contents
AT-102 ECG Recorder Service Handbook
AT-102
12-Channel ECG Recorder
Service Handbook
SCHILLER AG
Altgasse 68
6341 Baar, Switzerland
Phone: + 41 41 766 42 42
Fax: + 41 41 761 08 80
www.schiller.ch

ii
SCHILLER
AT-102 ECG Recorder Service Handbook
AT-102 Service handbook
Article Number 2. 540 028
Release a
November 2002
Associated Documents
Physicians Guide to the SCHILLER Interpretation and Measurement Program
AT-102 User Guide
The SCHILLER sales and service centre network is worldwide. For the address of your local
distributor, contact your nearest SCHILLER subsidiary. In case of difficulty a complete list of all
distributors and subsidiaries is provided on our internet site:
http://www.schiller.ch

iii
Article Number 2. 540 028
SCHILLER AG 2002
Contents
AT-102 ECG Recorder Service Handbook
Intended Use
The AT-102 is a 12-channel ECG device used for the recording, analysis and
evaluation of ECG Recordings. Recordings made with the AT-102 can be used as a
diagnostic aid for heart function and heart conditions. The AT-102 is designed for
indoor use and can be used for all patients of both sexes, all races, and all ages.
Physician`s Responsibility
The AT-102 ECG Unit is provided for the exclusive use of qualified physicians or
personnel under their direct supervision. The numerical and graphical results and
any interpretation derived from a recording must be examined with respect to the
patient`s overall clinical condition. Patient preparation and the general recorded data
quality, which could affect the report data accuracy, must also be taken into
account.
It is the responsibility of the physician to make the diagnosis or to obtain expert
opinion on the results, and to institute correct treatment if indicated.
FEDERAL LAW IN THE USA RESTRICTS THIS DEVICE TO SALE BY OR
ON THE ORDER OF A PHYSICIAN

iv
SCHILLER
AT-102 ECG Recorder Service Handbook
AT-102
Service Handbook
Contents
Intended Use...................................................................................iii
Physician`s Responsibility...............................................................iii
Terms of Warranty ......................................................................................... x
Disposal Instructions and Battery Care .....................................................xi
Safety Notices ................................................................................xii
Operational Precautions .............................................................................xii
Precautions for Operation with other Devices ......................................... xiii
Maintenance Precautions ..........................................................................xiv
Symbols and Conventions Used in this Service handbook ........... xv
What's in this book ........................................................................ xvi
Section 1 Operating Elements ............................ 1.1
Introduction .................................................................................. 1.2
Features .......................................................................................................1.2
Operating Philosophy Overview ...............................................................1.3
Initiating Functions or Tasks .....................................................................1.3
Main Components of the AT-102 ................................................................1.4
Back Panel ..................................................................................................1.5
Power Supply ..............................................................................................1.6
Switching On and Off .................................................................................1.6
Changing a Mains Fuse .............................................................................1.7
Potential Equalisation ................................................................................1.7
Keypad.........................................................................................................1.8
LCD Screen .............................................................................................. 1.10

v
Article Number 2. 540 028
SCHILLER AG 2002
Contents
AT-102 ECG Recorder Service Handbook
ECG Settings .............................................................................1.12
Auto Format 1 and 2 ................................................................................ 1.13
ECG Printout ............................................................................................ 1.13
Average Cycles ........................................................................................ 1.14
Rhythm Leads .......................................................................................... 1.14
Measurements, Markings and Interpretation ........................................ 1.14
Filters ........................................................................................................ 1.15
Baseline filter ............................................................................................ 1.15
Myogram filter .......................................................................................... 1.16
Mains filter ................................................................................................ 1.16
Baseline Stabiliser (SCHILLER SBS) ..................................................... 1.16
Smoothing Filter (SCHILLER SSF)......................................................... 1.16
Interpretation ............................................................................................ 1.17
Leads ........................................................................................................ 1.18
Defining Lead Sequence & Printout ...................................................... 1.18
Stress Settings ...........................................................................1.20
General Settings ...................................................................................... 1.21
Selecting the ERGO Device .................................................................... 1.21
Blood Pressure Entry .............................................................................. 1.21
Selecting the Default Test Protocol ........................................................ 1.22
Defining the Stage Printout Format ....................................................... 1.22
ST Amplitude Lead................................................................................... 1.22
Defining / Editing Exercise Protocols .................................................... 1.23
Factory programmed Treadmill Protocols............................................. 1.24
Bruce ........................................................................................................ 1.24
Factory programmed Bicycle Protocols ............................................... 1.24
System Settings .........................................................................1.25
Unit ............................................................................................................ 1.26
User Identification (User ID) .................................................................... 1.26
Date and Time .......................................................................................... 1.26
Language ................................................................................................. 1.27
Startup Screen ......................................................................................... 1.27
Paper Mode .............................................................................................. 1.27
Communication........................................................................................ 1.28
Test and Information................................................................................ 1.29
Obtaining a printout of all current settings ............................................ 1.30
Communications Test ............................................................................. 1.32
Upgrade/ Update Software ..................................................................... 1.32
Default Settings........................................................................................ 1.33
Unit Defaults Table................................................................................... 1.34

vi
SCHILLER
AT-102 ECG Recorder Service Handbook
Section 2 Functional Overview ........................... 2.1
Introduction .................................................................................. 2.2
MK 18 - 1 Main Board ................................................................... 2.4
Power Supply ..............................................................................................2.4
Program and ECG Memory ........................................................................2.4
Thermal Print Head Controller ...................................................................2.4
Printer Timing ..............................................................................................2.5
Paper Mark ..................................................................................................2.5
Power On Reset ..........................................................................................2.5
Stepper Motor Controller ...........................................................................2.5
ECG Isolated Power Supplies ...................................................................2.5
ECG Signal ..................................................................................................2.6
Noise Damping ...........................................................................................2.6
RS-232 Interface ..........................................................................................2.6
External Modem ..........................................................................................2.6
Top Assembly .............................................................................. 2.7
LCD Screen .................................................................................................2.7
Alphanumerical Keyboard .........................................................................2.7
Section 3 Fault Finding ....................................... 3.1
Introduction .................................................................................. 3.2
General Check Procedures........................................................................3.2
Fault Finding Chart ....................................................................... 3.3
AT-102 Initial Fault Diagnosis Chart (Sheet 1) ..........................................3.3
AT-102 Initial Fault Diagnosis Chart (Sheet 2) ..........................................3.4
AT-102 Fault Diagnosis Chart (Sheet A - Power Problems) .....................3.5
AT-102 Fault Diagnosis Chart (Sheet B - Power Problems) ....................3.6
AT-102 Fault Diagnosis Chart (Sheet C - General Problems) ..................3.7
AT-102 Fault Diagnosis Chart (Sheet D - Printer Problems)....................3.8
AT-102 Fault Diagnosis Chart (Sheet F - Exercise Mode Problems) ......3.9
AT-102 Fault Diagnosis Chart (Sheet G - Spirometry Problems) ......... 3.10
AT-102 Fault Diagnosis Chart (Sheet H - Communication
(RS) Problems) .......................................................................................... 3.11

vii
Article Number 2. 540 028
SCHILLER AG 2002
Contents
AT-102 ECG Recorder Service Handbook
Functional Check ........................................................................ 3.12
Thermal Printer Check................................................................3.13
Print Head Alignment and Print Head Tension...................................... 3.14
Thermal Printer Fault Diagnosis............................................................. 3.14
RS-232 Interface (and Spiro Check) .......................................... 3.15
Section 4 Module Removal and Replacement .. 4.1
Introduction .................................................................................. 4.3
Safety Notices .............................................................................. 4.4
Physical Overview ........................................................................ 4.5
Exploded View Lower Casing ...................................................... 4.6
Exploded View Upper Casing ...................................................... 4.7
Prerequisites, Test Equipment, Tools, and Accessories .............. 4.8
General Prerequisites .................................................................................4.8
Part Numbers ..............................................................................................4.8
Opening and Closing the Case .................................................... 4.9
Top Assembly Removal ..............................................................................4.9
Top Assembly Replacement .................................................................... 4.11
Main Board MK 18 - 1.................................................................4.12
Parts .......................................................................................................... 4.12
Board Removal ........................................................................................ 4.12
Board Replacement ................................................................................. 4.14
Printer Tray and Thermal printer ................................................. 4.15
Thermal Printer Removal ........................................................................ 4.15
Thermal Printer Replacement. ................................................................ 4.15
Battery Pack ............................................................................... 4.16
Battery Pack Removal ............................................................................. 4.16
Checks and Tests After Battery Replacement ...................................... 4.16
Keyboard.................................................................................... 4.17
LCD screen board......................................................................4.18
LCD board Removal ................................................................................ 4.18

viii
SCHILLER
AT-102 ECG Recorder Service Handbook
Section 5 Adjustments, System Upgrades and
Software Updates ................................................. 5.1
Introduction .................................................................................. 5.3
Safety Notices and Conditions ..................................................... 5.4
Conditions ...................................................................................................5.4
Test Equipment ............................................................................ 5.5
Proprietary Test Equipment/Tools ............................................................5.5
Main Board MK 14-10 Adjustment Locations ............................... 5.6
Component Location MK18-1 (Component Side)....................................5.6
Battery Charge Voltage ................................................................ 5.7
Precautions and Requirements.................................................................5.7
Tools and Equipment .................................................................................5.7
Procedure ....................................................................................................5.7
Paper Mark Detector Check ......................................................... 5.8
Tools, Equipment and Material ..................................................................5.8
Procedure ....................................................................................................5.8
ECG Amplifier +2V, -2V and PWM Ramp Time Adjustment ......5.10
Tools, Equipment and Material ............................................................... 5.10
Procedure ................................................................................................. 5.10
Service Screen...........................................................................5.12
Upgrading the Unit / Updating the Software................................5.14
Installing New Software Options (Upgrade) .......................................... 5.14
Updating the System Software ............................................................... 5.16
Section 6 Spare Parts .......................................... 6.1
Ordering Information .................................................................... 6.2
Spare Parts .................................................................................. 6.3

ix
Article Number 2. 540 028
SCHILLER AG 2002
Contents
AT-102 ECG Recorder Service Handbook
Section 7 Technical Data ..................................... 7.1
Technical Data .............................................................................. 7.3
System: ........................................................................................................7.3
Safety Standards: .......................................................................................7.4
Technical Data for ECG: .............................................................................7.4
Technical Data for Spirometry (Option): ...................................................7.5
Standard ......................................................................................................7.7
Configurations ............................................................................................7.7
Annex A Glossary................................................ A.1
Introduction ................................................................................. A.2
Acronyms .................................................................................... A.3
Annex B AT-102 Circuit Diagrams and
Engineering Drawings ........................................ B.1
Index

x
SCHILLER
AT-102 ECG Recorder Service Handbook
Terms of Warranty
The CardioLaptopAT-102 is warranted against defects in material and manufacture for the
duration of one year (as from date of purchase). Excluded from this guarantee is damage
caused by an accident or as a result of improper handling. The warranty entitles free
replacement of the defective part. Any liability for subsequent damage is excluded. The
warranty is void if unauthorized or unqualified persons attempt to make repairs.
In case of a defect, send the apparatus to your dealer or directly to the manufacturer. The
manufacturer can only be held responsible for the safety, reliability, and performance of the
apparatus if:
assembly operations, extensions, readjustments, modifications, or repairs are
carried out by persons authorized by him, and
the SCHILLER AT-102 and approved attached equipment is used in accordance with
the manufacturers instructions.
THERE ARE NO EXPRESS OR IMPLIED WARRANTIES WHICH EXTEND BEYOND THE
WARRANTIES HEREINABOVE SET FORTH. SCHILLER MAKES NO WARRANTY OF
MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE WITH RESPECT TO
THE PRODUCT OR PARTS THEREOF.
This equipment has been tested and found to comply with the limits for a class A digital
device, pursuant to both Part 15 of the FCC (Federal Communications Commission) Rules
and the radio interference regulations of the Canadian Department of Communications.
These limits are designed to provide reasonable protection against harmful interference
when the equipment is operated in a commercial environment. This equipment generates,
uses and can radiate radio frequency energy and, if not installed and used in accordance
with this instruction manual, may cause harmful interference to radio communications.
Operation of this equipment in a residential area is likely to cause harmful interference in
which case the user will be required to correct the interference at his own expense.

xi
Article Number 2. 540 028
SCHILLER AG 2002
Contents
AT-102 ECG Recorder Service Handbook
Disposal Instructions and Battery Care
Do not dispose of battery, boards, or components by fire or incinerator - Danger of
Explosion
Do not open the battery casing - Danger of acid burn
Only dispose of the battery, boards, or components in official recycling centres or
municipally approved areas. Alternatively, used batteries and components can be
returned to SCHILLER AG for disposal.
Units no longer required can be returned to SCHILLER AG for disposal. Alternatively
dispose of the unit in municipally approved recycling centres.

xii
SCHILLER
AT-102 ECG Recorder Service Handbook
Safety Notices
Operational Precautions
Before using the unit, ensure that an introduction regarding the unit functions and the
safety precautions has been provided by a product representative.
The guidelines for patient electrode placement are provided as an overview only. They are
not a substitute for medical expertise.
IEC 601-1-1 states that the patient must remain at least 1.5 metres clear of the AT-102.
When this is not possible an isolation transformer must be installed.
It must be ensured that neither the patient nor the electrodes (including the neutral
electrode) come into contact with other persons or conducting objects (even if these are
earthed).
This unit is CF classified and defibrillation protected when the original
patient cable is used. However, as a safety precaution when possible,
remove electrodes before defibrillation.
Do not touch the unit casing during defibrillation.
If the patient cable should become defective after defibrillation, lead-off is displayed and
an acoustic alarm given.
Do not operate the unit if the earth connection is suspect or if the mains lead is dam-
aged or suspected of being damaged.
This product is not designed for sterile use.
This product is not designed for outdoor use.
Do not use this unit in areas where there is any danger of explosion or in the presence
of flammable gases such as anaesthetic agents.
Do not operate the unit if the earth connection is suspect or if the mains lead is dam-
aged or suspected of being damaged.
There is no danger when using the ECG unit for a patient with a pacemaker fitted.
The LCD screen assembly is heavy and can cause injury if closed unintentionally.
Ensure fingers are kept clear.
Surface temperature of applied parts must not exceed 41o.
If the display is damaged, a leakage of fluid may occur. do not inhale the vapour from
this fluid and avoid contact with mouth and skin. if contact is made, clean contaminated
area immediately with fresh water.


xiii
Article Number 2. 540 028
SCHILLER AG 2002
Contents
AT-102 ECG Recorder Service Handbook
Safety Notices
Precautions for Operation with other Devices
Use only accessories and other parts recommended or supplied by SCHILLER AG. Use
of other than recommended or supplied parts may result in injury, inaccurate information
and/or damage to the unit.
Externally connected units must use the same common earth.
Externally connected units must use an original SCHILLER interface cable.
If several units are coupled, there is a danger of summation of leakage currents. When
two or more units are coupled together, an isolation transformer must be used in the
mains supply.
The AT-102 complies with EMC regulations for medical products which affords protection
against emissions and electrical interference. However, special care must be exercised
when the unit is used with high frequency equipment.
There is no danger when using the ECG unit simultaneously with electrical stimulation
equipment. However, the stimulation units should only be used at a sufficient distance
from the electrodes. In case of doubt, the patient should be disconnected from the
recorder.
To avoid possible interference from the Ergometer when carrying out an exercise test, it
is recommended that both the AT-102 and the Ergometer are connected to the same
common ground.

xiv
SCHILLER
AT-102 ECG Recorder Service Handbook
Safety Notices
Maintenance Precautions
BEFORE CARRYING OUTANY MAINTENANCE PROCEDURES, SWITCH THE UNIT
OFF AND DISCONNECT FROM THE MAINS BY REMOVING THE MAINS PLUG.
The unit is protected by double pole / neutral fusing for continued protection against the
risk of fire. Replace only with the same fuse type and rating.
Do not use high temperature sterilisation processes (such as autoclaving). Do not use e-
beam or gamma radiation sterilisation.
Do not use solvent or abrasive cleaners on either the unit or cable assemblies.
Do not, under any circumstances, immerse the unit or cable assemblies in liquid.

xv
Article Number 2. 540 028
SCHILLER AG 2002
Contents
AT-102 ECG Recorder Service Handbook
Symbols and Conventions Used in this
Service handbook
The following words and symbols mark special messages throughout this guide.
General Warning. Text set off in this manner indicates that failure to follow directions could
result in bodily harm or loss of life or failure to follow directions could result in damage to
equipment or loss of information.
WARNING:
Specific Warning. Text set off in this manner indicates that failure to follow
directions could result in bodily harm or loss of life.
CAUTION:
Text set off in this manner indicates that failure to follow directions could result
in damage to equipment or loss of information.
NOTE:
Text set off in this manner presents clarifying information, specific instructions,
commentary, sidelights, or interesting points of information.

xvi
SCHILLER
AT-102 ECG Recorder Service Handbook
What's in this book
The service philosophy for the AT-102 is fault finding to module level. The purpose of this book is to
provide all the information necessary to enable the service engineer to efficiently locate and
replace a faulty module. This book assumes no detailed knowledge of the AT-102 but does require
that the service engineer is familiar with standard workshop practices, and to have attended an AT-
102 service course. The book is divided into the following chapters:
Chapter 1 - Operating Elements
The purpose of this chapter is to provide an easy reference for all the main operator functions and
to give a basic introduction to the AT-102 . This chapter gives details of the operator controls with
the operation and function of each key briefly explained. The information in this chapter provides a
background to the operating functions only. Complete operating information is provided in the
SCHILLER AT-102 User Guide.
Chapter 2 - Functional Overview
This chapter provides a functional overview of the AT-102 . The description is supported by
functional block diagrams.
Chapter 3 - Fault Diagnosis
This chapter provides a guide to locate a fault to module level. The diagnostics are presented in a
logical sequence of fault finding algorithms and procedures. Illustrations are provided to support
the text where needed.
Chapter 4 - Module Removal and Replacement
This chapter gives an overview of the physical construction of the AT-102 with the main physical
attributes of the unit briefly described. The physical description is supported by illustrations
showing the internal location of all modules. Removal and replacement instructions for all
removable modules are also provided in this chapter. Each procedure is autonomous with details
of tools, jumper settings, adjustments and settings or special requirements that are required
before and after replacement. Functional checks that must be carried out after replacing a module
are also provided.

xvii
Article Number 2. 540 028
SCHILLER AG 2002
Contents
AT-102 ECG Recorder Service Handbook
Chapter 5 - Adjustments
This chapter provides all adjustments and settings. Also detailed in this chapter are basic
functional test procedures that can be performed to check the functioning of the unit.
Chapter 6 - Spare Parts
This chapter provides the part numbers and reordering information for all replaceable modules.
Also included in this chapter are details of any special test equipment or special tools required for
adjustment or fault finding procedures.
Chapter 7 - Technical Data
The full technical specification of the AT-102 is given in this chapter.
Annex A - Glossary
This chapter explains all the acronyms and signal titles used in this book and in the AT-102 circuit
diagrams.
Annex B - Circuit Diagrams & Board layouts
The circuit diagrams and component layouts are provided for all boards. These details are provided
for information only.

xviii
SCHILLER
AT-102 ECG Recorder Service Handbook

1.1
Article Number 2. 540 028
SCHILLER AG 2002
AT-102 ECG Service Handbook Section 1
Operating Elements
Section 1
Operating Elements
This section contains an introduction to the AT-102 and an
overview of all external connections. It also gives an overview of
the operating philosophy of the AT-102 and an introduction to the
basic functions of the unit. An overview of the system settings are
given in this section - for full operating details and system setup
see the AT-102 User Guide.

1.2
AT-102 Service Handbook
Introduction
The SCHILLER AT-102 is a 12-channel ECG unit designed to record, display, and analyse
resting ECGs (exercise ECGs can also be recorded). The unit has been extensively
researched to give an ergonomic, clear interface that`s easy to use without compromising
functionality. The AT-102 has the following features:
Features
Alphanumeric keypad and dedicated soft key interface for easy, user friendly
operation.
Storage and transmission facilities for recordings.
Excercise ECG with interface for control of digital ergometers and treadmills. (Option)
Integral full size thermal quality printer with various user defined print format options.
External laser or deskjet printer (Option).
ECG Interpretation including measurements and average cycles with automatic and
manual printout of the recording. (Option)
Spirometry (Option)