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MAC™ 1200/MAC™ 1200 ST
Resting ECG Analysis System
(2018357-003 & 2013503-003 PWAs)
Service Manual
2012250-095 |
Revision A |
g
NOTE: The information in this manual only applies to MAC™ 1200 resting ECG analysis system with the 2018357-003 or 2013503-003 board and software v6.2. It does not apply to earlier software versions. Due to continuing product innovation, specifications in this manual are subject to change without notice.
CAUTION
Software compatibility issue. Attempting to download:
v6.2 software or later into -002 boards (PN 2018357-001, 2018357-002, 2013503-001 or 38803267) or
v6.11 software or earlier into -003 boards (PN 2018357-003 or 2013503-003)
will render the MAC 1200 unit inoperable.
MAC→ and MUSE→ owned by GE Medical Systems Information Technologies, a General Electric company, going to market as GE Healthcare. All other marks are owned by their respective owners.
© 2007 General Electric Company. All rights reserved.
T-2 |
MAC™ 1200 resting ECG analysis system |
Revision A |
|
2012250-095 |
22 May 2007 |
CE Marking Information
CE Marking Information
Compliance
The MAC™ 1200 resting ECG analysis system bears CE mark CE-0459 indicating its conformity with the provisions of the Council Directive 93/ 42/EEC concerning medical devices and fulfills the essential requirements of Annex I of this directive. The product is in radiointerference protection class A in accordance with EN 55011.
The country of manufacture can be found on the equipment labeling.
The product complies with the requirements of standard EN 60601-1-2 “Electromagnetic Compatibility - Medical Electrical Equipment”.
The safety and effectiveness of this device has been verified against previously distributed devices. Although all standards applicable to presently marketed devices may not be appropriate for prior devices (i.e. electromagnetic compatibility standards), this device will not impair the safe and effective use of those previously distributed devices. See user’s information.
Exceptions
The MAC™ 1200 resting ECG analysis system EMC: Immunity
Performance
Users should be aware of known RF sources, such as radio or TV stations and hand-held or mobile two-way radios, and consider them when installing a medical device or system.
Be aware that adding accessories or components, or modifying the medical device or system may degrade the EMI performance. Consult with qualified personnel regarding changes to the system configuration.
Revision A |
MAC™ 1200 resting ECG analysis system |
CE-1 |
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2012250-095 |
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CE Marking Information
For your notes
CE-2 |
MAC™ 1200 resting ECG analysis system |
Revision A |
|
2012250-095 |
|
1
2
Contents
The Basics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
About This Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Manual Purpose . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Intended Audience . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Illustrations and Names . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
Basic Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
1-5 |
Variants of the MAC™ 1200 resting ECG analysis system . . . . . . . . . . . . . . . . . . 1-6 Hardware Functional Blocks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
Block Circuit Diagram of Entire Instrument . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7 Mechanical Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8
Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Basic Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
Switching Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4
PCB NC Battery Charge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5
Charging Circuit for the NC Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5 Battery-Dependent Device Behavior . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6
PCB Control CS_CI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7
Generation of Internal Power Supplies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7
Switch On/Off Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8
ECG Recording and Front-End Processing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9
Controller Core . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10
Real Time Clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11
Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12
LCD Graphics Display Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12
Revision A |
MAC™ 1200 resting ECG analysis system |
i |
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2012250-095 |
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Modem Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
2-17 |
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Internal Interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
2-18 |
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Mechanical Interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
2-18 |
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Electronic Interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
2-18 |
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Interfaces to Peripherals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
2-23 |
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Electronic Interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
2-24 |
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Limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
2-26 |
3 |
System Test Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
3-1 |
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General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
3-3 |
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Test Start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
3-4 |
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Display Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
3-5 |
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Contrast Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
. 3-5 |
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Keyboard Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
3-6 |
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Motor Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
3-7 |
|
Test Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
3-8 |
|
Self-Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
3-9 |
|
Error Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
. 3-9 |
|
Recording Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
3-10 |
|
V24 Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
3-11 |
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Sending and Receiving (1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
3-11 |
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Send Test String to Device (2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
3-11 |
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Send and Receive with Device (3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
3-12 |
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Time and Date . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
3-13 |
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Electrode Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
3-14 |
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Time Constant/Baseline Roll Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
3-15 |
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Setting the Device Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
3-16 |
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Interpretation (International Device Models Only) . . . . . . . . . . . . . . . . . . . . . . . . |
3-18 |
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Pace Enhance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
3-19 |
|
Serial Number . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
3-20 |
ii |
MAC™ 1200 resting ECG analysis system |
Revision A |
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2012250-095 |
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4
5
6
7
8
Ergometer / Treadmills (JAPAN Device Model Only) . . . . . . . . . . . . . . . . . . . . . . 3-21 ACI-TIPI (US Device Models Only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-22
Pharma . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-23
High Security . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-23
Repair Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Safety Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Replacing Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Opening the Device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
5-1 |
Basic Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3
Adjustment Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
Basic Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3
Service and Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . 7-1
Technical Inspections/Preventative Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . 7-3
Visual Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-4
Test Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-4
Safety Analysis Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-8
Maintenance, Cleaning, and Disinfection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-11
Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
8-1 |
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-3
Field Replaceable Units (FRUs) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-4
High Level Assemblies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-4
Revision A |
MAC™ 1200 resting ECG analysis system |
iii |
|
2012250-095 |
|
9
10
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
9-1 |
Basic Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-3
Recording . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-3
Printer Paper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-3
Paper Transport . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-4
Membrane Keypad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-4
Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-4
Indicators (LEDs) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-4
Automatic Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-4
Detection of Pacer Pulses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-5
Heart Rate Indication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-5
Signal Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-5
Data Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-6
Pin Assignment of Data Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-6
Remote Start (Hardware) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-6
Signal Transmission . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-7
ECG Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-8
Automatic ECG Gain Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-8
Baseline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-8
Anti-Drift System (ADS) (Cubic Spline) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-8
ECG Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-8
Blocking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-9
Electrode Monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-9
Text Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-9
Copy Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-9
Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-9
Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-9
Mains Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-10
Battery Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-10
Operational Readiness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-10
Operating Position . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-10
Environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-11
Recorder Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-11
Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-11
Drawings . . . . . . . . . . . . . . |
. . . . . . . . . . . . . . . . . . . . . . . |
10-1 |
Basic Information . . . . . . . . . . . . . . . . |
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
. 10-2 |
High Level Assembly, PN 101 168 01... |
38, Sheet 1 . . . . . . . . . . . . . . . . . . . . . . . |
10-3 |
High Level Assembly, PN 101 168 01... |
38, Sheet 2 . . . . . . . . . . . . . . . . . . . . . . . |
10-4 |
PCB Assembly Drawing, PN 2033914-027 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
10-5 |
|
Schematic, PN 2033914-033, Sheet 1 . |
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
10-6 |
iv |
MAC™ 1200 resting ECG analysis system |
Revision A |
|
2012250-095 |
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Schematic, PN 2033914-033, Sheet 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-7 Schematic, PN 2033914-033, Sheet 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-8 Schematic, PN 2033914-033, Sheet 4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-9 Schematic, PN 2033914-033, Sheet 5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-10 Schematic, PN 2033914-033, Sheet 6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-11 Schematic, PN 2033914-033, Sheet 7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-12 Schematic, PN 2033914-033, Sheet 8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-13 Schematic, PN 2033914-033, Sheet 9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-14 Schematic, PN 2033914-033, Sheet 10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-15 Schematic, PN 2033914-033, Sheet 11 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-16 Schematic, PN 2033914-033, Sheet 12 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-17 Schematic, PN 2033914-033, Sheet 13 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-18 Schematic, PN 2033914-033, Sheet 14 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-19 Schematic, PN 2033914-033, Sheet 15 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-20 Schematic, PN 2033914-033, Sheet 16 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-21 Schematic, PN 2033914-033, Sheet 17 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-22 Schematic, PN 2033914-033, Sheet 18 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-23 Schematic, PN 2033914-033, Sheet 19 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-24 Schematic, PN 2033914-033, Sheet 20 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-25 PCB Battery Charge CS_CSI, PN 388 032 90, Sheet 1 . . . . . . . . . . . . . . . . . . . . 10-26 PCB Battery Charge CS_CSI, PN 388 032 90, Sheet 2 . . . . . . . . . . . . . . . . . . . . 10-27
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MAC™ 1200 resting ECG analysis system |
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For your notes
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MAC™ 1200 resting ECG analysis system |
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1 The Basics
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For your notes
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MAC™ 1200 resting ECG analysis system |
Revision A |
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2012250-095 |
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The Basics: About This Manual
About This Manual
Manual Purpose
This manual supplies technical information for service representative and technical personnel so they can maintain the equipment to the assembly level. Use it as a guide for maintenance and electrical repairs that are considered field repairable. Where necessary the manual identifies additional sources of relevant information and or technical assistance.
See the operator manual for the instructions necessary to operate the equipment safely in accordance with its function and intended use.
This manual addresses both MAC 1200/1200ST units (international units) and MAC 1200 units (USA units). Information that is specific to either unit is identified.
Intended Audience
This manual is intended for the person who uses, maintains, or troubleshoots this equipment.
Definitions
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The following formats are used in this manual to highlight various web |
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viewer features and functions. |
Black text |
Indicates keys on the keyboard, text to be entered, or hardware items such as buttons or |
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switches on the equipment. |
Italicized text |
Indicates software terms that identify menu items, buttons, or options in various windows. |
Ctrl+Esc |
Indicates a keyboard operation. A (+) sign between the names of two keys indicates that |
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you must press and hold the first key while pressing the second key once. |
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For example, “Press Ctrl+Esc” means to press and hold down the Ctrl key while pressing |
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the Esc key. |
<Space> |
Indicates you must press the spacebar. When instructions are given for typing a precise text |
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string with one or more spaces, the point where the spacebar must be pressed is indicated |
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as: <Space>. The purpose of the < > brackets is to ensure you press the spacebar when |
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required. |
Enter |
Indicates you must press the “Enter” or “Return” key on the keyboard. Do not type “enter”. |
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The Basics: About This Manual
Illustrations and Names
All illustrations in this manual are provided as examples only. They may not necessarily reflect your monitoring setup or data displayed on your monitor.
In this manual, all names appearing in examples and illustrations are fictitious. The use of any real person’s name is purely coincidental.
Revision History
This manual has a revision letter, located at the bottom of each page. This revision letter changes whenever the manual is updated. Revision A is the initial release of the document.
Table 1. Revision History, PN 2012250-095
Revision |
Date |
Comments |
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A |
22 May 2007 |
Initial release of this manual. |
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The Basics: Basic Information
Basic Information
This service manual describes software version 6 of MAC™ 1200 resting
ECG analysis system.
The MAC™ 1200 resting ECG analysis system is a portable electrocardiograph with an integrated printing unit. It is used to acquire, record and process ECG signals.
The integrated LCD graphics display shows three ECG channels. It also displays status information, filter settings, speed/format, gain and the status of the electrodes.
With the setup feature, users can set up the device and the modes for his own needs.
The MAC™ 1200 resting ECG analysis system offers three modes of operation:
International |
USA |
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Automatic |
12-lead |
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Manual |
6-lead |
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Arrhythmia |
Arrhythmia |
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ECGs acquired in automatic (12-lead) mode can be transmitted to the
MUSE or CardioSys system directly or via modem.
A NC-battery with a charging circuit is integrated into the unit.
In addition, a pump for the KISS system can be integrated into the instrument as a separate option.
NC battery with charging circuit is integrated in general
Automatic mode with CSI protocol for transmission
Automatic mode with interpretation (Option Code)
Automatic mode with storage for up to 40 ECGs (Option Code)
The acquired ECGs can be transmitted to MUSE or CardioSys directly or via a Modem.
Additionally the MAC 1200 ST can run stress test operating mode (Option Code).
To control stress test devices the MAC 1200 ST has a modified keyboard with additional keys for stress test.
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The Basics: Basic Information
Variants of the MAC™ 1200 resting ECG analysis system
The complete list of the variants is included in Chapter 8, “Parts List”.
The following table gives an overview of the different device models of the MAC™ 1200 resting ECG analysis system.
Device |
Device |
Manufacturer ID |
Keypad |
Labeling |
Mains Voltage |
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Model |
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MAC1200 |
INT |
GE Medical |
Icons |
International |
230V |
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MAC1200 ST |
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Systems |
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MAC1200 |
Europe 2 |
GE Medical |
Text |
International |
230V |
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MAC1200 ST |
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Systems |
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MAC1200 |
USA |
GE Medical |
Text |
USA |
115V |
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MAC1200 ST |
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Systems |
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MAC1200 |
RUSS |
GE Medical |
Kyrillian |
International |
230V |
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Systems |
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MAC1200 ST |
Japan |
GE Medical |
Japanese |
International |
230V |
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Systems |
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MAC1200 |
Pharma |
GE Medical |
Text |
USA |
115V |
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Systems |
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Hardware Functional Blocks
The main functional blocks for the MAC™ 1200 resting ECG analysis system are listed below.
Switching power supply
PCB Control CS_CI
Printing unit
Keypad
1/4 VGA graphics display, monochrome
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The Basics: Block Circuit Diagram of Entire Instrument
Block Circuit Diagram of Entire Instrument
MAC 1200 (US), Version 6.2
Program |
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Modem Supply |
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Memory |
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Internal |
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ECG RAM |
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Boot Loader |
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RAM |
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Buffered |
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RS232 |
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Driver |
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Configuration |
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Keypad |
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Display |
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ECG |
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Interface |
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ECG |
Acquisition |
Controller |
Display |
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and |
Supply |
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Input |
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Conditioning |
Core |
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Motor |
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Real Time |
Control |
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Clock |
Thermal |
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Buffered |
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Pinhead |
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Logic Supply |
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Control |
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+5 V +3.3 V |
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Analog |
Device |
Pump Interface |
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Supply |
On/Off |
(not in US |
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Printhead |
Control |
Device) |
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Supply |
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PCB Control SC_CI |
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Line |
Line Power |
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Power |
Input with |
NC Battery |
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Input |
Fuse |
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Switching |
PCB NC |
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Power |
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Battery |
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Supply |
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Charge |
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+26.5 V |
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Line Power, NC Battery |
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RS232
Interface
Keypad
LCD Graphics Display
1/4 VGA Monochrome
Motor
Thermal Printhead
Printing Unit
Option Pump
(Not in US Device)
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The Basics: Mechanical Components
Mechanical Components
The main mechanical components comprise the upper and lower shell of the MAC™ 1200 resting ECG analysis system. The lower shell serves as a basic unit to receive the following assemblies.
Line power input module with fuse
Switching power supply
NC Battery
PCB NC Battery Charge
PCB Control CS_CI
Graphics display
Thermal printing unit
Paper container
The upper shell accommodates the keypad, which is connected to the
PCB Control CS_CI via a 26-pin connector.
The MAC™ 1200 resting ECG analysis system can be opened by releasing 5 screws at the bottom of the lower shell, opening the paper flap and lifting up the upper shell a little bit to remove the keypad cable from the PCB Control CS_CI. The upper shell then can be removed completely.
To replace the NC Battery, the battery flap at the bottom of the lower shell must first be unlocked with a screw-driver before it can be removed.
The 15-pin input connector to connect the patient cable and the 9-pin connector for the RS-232 interface are located directly on the PCB Control CS_CI.
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2 Functional Description
Revision A |
MAC™ 1200 resting ECG analysis system |
2-1 |
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2012250-095 |
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For your notes
2-2 |
MAC™ 1200 resting ECG analysis system |
Revision A |
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2012250-095 |
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Functional Description: Basic Information
Basic Information
The block circuit diagram of the entire instrument in Chapter 1, “Block Circuit Diagram of Entire Instrument” and the functional blocks of circuit diagram sheets (P-plans) describe the individual functional blocks.
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Functional Description: Switching Power Supply
Switching Power Supply
The switching power supply generates the fundamental device voltage for the PCB Control CS_CI and for the PCB NC Battery Charge. It has the following input specifications.
Input voltage range: 85 ... 264 Vac
Line frequency range: 47 ... 65 Hz
The output voltage is +26.5 Vdc, the maximum load is 1.5 A.
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Functional Description: PCB NC Battery Charge
PCB NC Battery Charge
The MAC™ 1200 resting ECG analysis system can operate on battery power. With a new, fully charged NC battery, up to 50 ECGs can be recorded in Automatic (12-lead) mode.
The PCB NC battery charge controls and monitors the charging process, depending on the status of the battery and the status of the device.
Charging Circuit for the NC Battery
An integrated charging device is used to charge the battery. During charging, it monitors the battery voltage function and switches over from rapid charging to trickle charging.
Applying the line power to the MAC™ 1200 resting ECG analysis system, or insertion of the battery activates the charging circuit. During a recording, the charging current is reduced. In standby mode, a depleted battery is fully charged within 4 hours.
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Functional Description: PCB NC Battery Charge
Battery-Dependent Device Behavior
Depending on the status of the battery and the status of the device, the following behavior occurs.
Table 1. Battery State
State 1 Battery depleted, line power supply is connected up
Battery charged in rapid mode; when fully charged, switchover to trickle charging.
State 2 Battery full, line power supply is connected up
Battery charged in rapid mode for some minutes till the charging circuit recognizes battery full, then switchover to trickle charging.
State 3 Battery depleted, no line power supply, device is switched on
Device inoperative.
State 4 Battery full, no line power supply, device is switched on
Device fully operative. When battery is almost depleted, the LEDBAT signal is activated to indicate that the device should be charged by connecting to the line power supply. If the operation is continued without line power, MAC 1200/ 1200 ST will shut down itself when a minimum level is reached to prevent the battery from a excessive discharge.
State 5 Battery depleted, line power supply is connected up, device is switched on
Battery is charged in rapid mode, device is fully operative, including recording. During recording, the charging current is reduced. If a lot of recordings take place in this phase, the battery is not fully charged within 4 hours.
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Functional Description: PCB Control CS_CI
PCB Control CS_CI
The PCB Control CS_CI is the main board of the MAC™ 1200 resting ECG analysis system. The main board accommodates the control functions of the device, except the line power supply and the NC batterycharging controller.
Generation of Internal Power Supplies
Logic Power Supply +5 V and +3.3 V
The processor core and the memory is a fully +3.3 V design. The interface functions to display, to RS-232, to the printing unit and to the ECG acquisition unit are supplied with +5 V.
Both the +3.3 V and the +5 V are generated separately by a clock-rated voltage controller. By using the “adjustable version” of the voltage controller, both supplies are based on the same voltage controller. The output voltage is determined by appropriate dimensioning of the voltage divider at the feedback input of the voltage controller.
Standby Supply +5 VSTB and +3.3 VSTB
The standby supply + 5VSTB supplies the ON/OFF Control, the
+ 3.3 VSTB buffers the patient ECG memory when the device is turned off. Both supplies are generated together from one low-power linear regulator with low quiescent supply current.
Analog Supply +12 V
+12 V is used for the heating control and temperature monitoring of the printing unit, which requires only a current of a few milliamperes. This supply is generated by a linear regulator with feedback input.
FPGA Power Supply +2.5V +1.25V
+2.5 V is the auxilliary source of power and +1.25 V is the main power supply for the FPGA internal logic. These voltages are generated by Dual Output Low Dropout Regulator.
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Functional Description: PCB Control CS_CI
Switch On/Off Circuit
The Switch On/Off circuit consists of the On/Off control and the Voltage control.
The On/Off control switches the device on or off by switching the device supplies +UVERS and +USUPPSW. The On/Off control is supplied from the +5 VSTB.
Device On Sequence
The transition from device Off state, or Standby state when line power is connected, to device On state can only be activated by pressing the On/ Off button.
Device Off Sequence
The transition from device On state to device Off state or Standby state when line power is connected can be achieved as follows.
Pressing the On/Off button.
When the control core activates the signal DEV_OFF.
When the voltage control applies the signal REG_OFF_, because the battery voltage gets too low during battery operation.
The Voltage Control controls the battery voltage during battery operation.
The signal BATT_LEV2 indicates that the battery charge has gone down, and the device should be connected to the line power soon.
The signal BAT_LEV1 indicates that the battery has been discharged almost completely, the device should be connected to the line power immediately, otherwise the device will shut down within few minutes.
If battery discharge is continued without connecting to the line power, the signal REG_OFF_ is activated and the device is switched off.
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Functional Description: PCB Control CS_CI
ECG Recording and Front-End Processing
The patient input is classified as being cardiac floating and is defibrillation-proof.
The patient leads are connected with a 15-pin connector with a special form for the specified and released patient cables for the MAC™ 1200 resting ECG analysis system.
The main element of the ECG recording and front-end processing is a set of chips comprising 3 ASICs. Pace detection is realized by a separate circuit.
Every disconnected electrode is detected by a special AC measurement, which allows higher impedance between electrode and patient.
N common-mode compensation ensures suppression of interference, at the same time serving to improve the in-phase suppression of the input electrodes.
To protect patients, the ECG recording and front-end processing are assembled as floating components. Digital signals from and to the controller core are transmitted via opto-electronic couplers. The floating supply ±5 V is generated by an isolated flyback converter from the +5 V logic power supply.
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Functional Description: PCB Control CS_CI
Controller Core
The actual core comprises the Motorola Power PC MPC855T, which contains the following integrated components.
Chipselect logic
DRAM controller
SCC and SMC for RS-232
SPI interface
I/O ports
Real-time clock counter register
In addition, the MPC855T contains a JTAG port with test and programming capabilities.
The MPC855T has the following additional power supplies.
VDDSYN, filtered from the +3.3 V logic supply, for the clock generation.
KAPWR, generated from the +3.3 V logic supply or from a battery when device is off, used for buffering the RTC Counter Register.
The clock generation for the MPC855T is realized by a quartz oscillator with 32.768 KHz. The system clock CLOCKOUT is adjusted with the internal PLL register. The system frequency is 25 MHz.
The watchdog/reset generation is implemented separately in an integrated system monitoring chip. It has the following functions.
Power-up reset for the MPC855T when the device is switched on.
Voltage monitoring of the +3.3 V and +5 V with reset generation.
Watchdog
Switchover to battery supply for patient ECG memory when device is switched off.
Signal for access protection for patient ECG memory when device is switched off.
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Functional Description: PCB Control CS_CI
The Reset Configuration defines startup conditions like boot port size and clock generation source.
Four LEDs indicate the device status in addition to the following.
LED1: |
Active when a HRESET_ occurs. |
LED2: |
Indicator for the logic supply. |
LED3, LED4: |
Indicate internal software states. |
The control register comprises device control signals to switch off the device, control battery charging and display control signals.
The status register contains information on the device hardware configuration and the state of the battery charge.
Real Time Clock
With software version 6, two options for the real time clock are supported. The software checks for an external real time clock chip (X13 on PWA control). This chip is available with Index G of PWA Control CS_CI and Index F of PWA Control CS_C.
If the external RTC is found, it will be used for the clock function. If not, the internal clock of the MPC855T will be used. The external RTC is more accurate than the internal one. Both clocks are buffered by the voltage KAPWR.
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Functional Description: PCB Control CS_CI
Memory
The complete memory of the MAC™ 1200 resting ECG analysis system is located on the PCB Control CS_C(I). The software of the device can be loaded through the JTAG port during the production process, or for service purposes with the appropriate programming software through the RS-232 interface.
Program Memory
Type: |
Flash, +3.3 V supply |
Organization: |
2Mbit X 16, 4Mbyte |
Wait states: |
1 wait state |
DRAM
Type: |
SDRAM, +3.3 V supply |
Organization: |
4Mbit X 16, 8Mbyte |
Wait States: |
0 wait state |
Patient ECG Memory
Type: |
Buffered SRAM, +3.3 V supply |
Organization: |
512Kwords X 16 bits |
Wait States: |
1 wait state |
Configuration Memory
The configuration memory is part of the program memory Flash. With special hardware and software protection facilities, write access to the Flash is only possible in the defined configuration memory of the Flash. Thus an external configuration memory like an EEPROM is not required.
LCD Graphics Display Interface
The LCD controller is now implemented in FPGA.
Controller Interface
For the digital control signals, delivered from the MPC855T, only an output driver is required.
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2012250-095 |
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