GE MAC 1200 User manual

g
MAC™1200/MAC™1200 ST
Resting ECG Analysis System
(2018357-003 & 2013503-003 PWAs)
Service Manual
2012250-095 Revision D
GE Healthcare

T-2 MAC1200 resting ECG analysis system Revision D
2012250-095 15 August 2014
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.
MACand MUSEowned by GE Medical Systems Information Technologies, Inc., a General Electric company, going to
market as GE Healthcare. All other marks are owned by their respective owners.
© 2010, 2014 General Electric Company. All rights reserved.
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.

Revision D MAC1200 resting ECG analysis system Compliance-1
2012250-095
Compliance
Compliance
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.

Compliance-2 MAC1200 resting ECG analysis system Revision D
2012250-095
Compliance
For your notes

Revision D MAC1200 resting ECG analysis system i
2012250-095
Contents
1The Basics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
About This Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Manual Purpose . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Intended Audience . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Illustrations and Names . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Basic Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Variants of the MAC1200 resting ECG analysis system . . . . . . . . . . . . . . . . . . . 6
Hardware Functional Blocks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Block Circuit Diagram of Entire Instrument . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Mechanical Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Basic Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Switching Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
PCB NC Battery Charge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Charging Circuit for the NC Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Battery-Dependent Device Behavior . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
PCB Control CS_CI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Generation of Internal Power Supplies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Switch On/Off Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
ECG Recording and Front-End Processing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Controller Core . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Real Time Clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
LCD Graphics Display Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Modem Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Internal Interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Mechanical Interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Electronic Interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . 18
Interfaces to Peripherals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

ii MAC1200 resting ECG analysis system Revision D
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Electronic Interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . 24
Limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
3System Test Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Test Start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Display Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Contrast Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Keyboard Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Motor Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Test Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Self-Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Error Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Recording Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
V24 Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . 11
Sending and Receiving (1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Send Test String to Device (2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Send and Receive with Device (3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Time and Date . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Electrode Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Time Constant/Baseline Roll Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Setting the Device Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Interpretation (International Device Models Only) . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Pace Enhance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Serial Number . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Ergometer / Treadmills (JAPAN Device Model Only) . . . . . . . . . . . . . . . . . . . . . . . . 21
ACI-TIPI (US Device Models Only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Pharma . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
High Security . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Revision D MAC1200 resting ECG analysis system iii
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4Repair Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Safety Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Replacing Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Opening the Device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
5Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Basic Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
6Adjustment Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Basic Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
7Service and Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Technical Inspections/Preventative Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Visual Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . 4
Test Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Safety Analysis Tests . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . 8
Maintenance, Cleaning, and Disinfection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
8Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Field Replaceable Units (FRUs) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
High Level Assemblies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
9Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Basic Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Recording . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Printer Paper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Paper Transport . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Membrane Keypad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Display . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . 4

iv MAC1200 resting ECG analysis system Revision D
2012250-095
Indicators (LEDs) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Automatic Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Detection of Pacer Pulses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Heart Rate Indication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Signal Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Data Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Pin Assignment of Data Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Remote Start (Hardware) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Signal Transmission . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
ECG Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Automatic ECG Gain Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Baseline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Anti-Drift System (ADS) (Cubic Spline) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
ECG Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Blocking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Electrode Monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Text Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Copy Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Mains Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Battery Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Operational Readiness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Operating Position . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Recorder Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . 11
Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
10 Drawings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Basic Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
High Level Assembly, PN 101 168 01...38, Sheet 1 . . . . . . . . . . . . . . . . . . . . . . . . . . 3
11 Drawings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
High Level Assembly, PN 101 168 01...38, Sheet 2 . . . . . . . . . . . . . . . . . . . . . . . . . . 4
PCB Assembly Drawing, PN 2033914-027 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Schematic, PN 2033914-033, Sheet 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Schematic, PN 2033914-033, Sheet 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Schematic, PN 2033914-033, Sheet 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Schematic, PN 2033914-033, Sheet 4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

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Schematic, PN 2033914-033, Sheet 5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Schematic, PN 2033914-033, Sheet 6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Schematic, PN 2033914-033, Sheet 7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Schematic, PN 2033914-033, Sheet 8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Schematic, PN 2033914-033, Sheet 9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Schematic, PN 2033914-033, Sheet 10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Schematic, PN 2033914-033, Sheet 11 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Schematic, PN 2033914-033, Sheet 12 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Schematic, PN 2033914-033, Sheet 13 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Schematic, PN 2033914-033, Sheet 14 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Schematic, PN 2033914-033, Sheet 15 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Schematic, PN 2033914-033, Sheet 16 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Schematic, PN 2033914-033, Sheet 17 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Schematic, PN 2033914-033, Sheet 18 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Schematic, PN 2033914-033, Sheet 19 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Schematic, PN 2033914-033, Sheet 20 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
PCB Battery Charge CS_CSI, PN 388 032 90, Sheet 1 . . . . . . . . . . . . . . . . . . . . . . . 26
PCB Battery Charge CS_CSI, PN 388 032 90, Sheet 2 . . . . . . . . . . . . . . . . . . . . . . . 27

vi MAC1200 resting ECG analysis system Revision D
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Revision D MAC1200 resting ECG analysis system 1-1
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1The Basics

1-2 MAC1200 resting ECG analysis system Revision D
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For your notes

Revision D MAC1200 resting ECG analysis system 1-3
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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
The following formats are used in this manual to highlight various web viewer
features and functions.
Black text Indicates keys on the keyboard, text to be entered, or hardware items such as buttons or
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
you must press and hold the first key while pressing the second key once.
For example, “Press Ctrl+Esc” means to press and hold down the Ctrl key while pressing
the Esc key.
<Space>Indicatesyoumustpressthespacebar. Wheninstructionsaregivenfortyping aprecisetext
string with one or more spaces, the point where the spacebar must be pressed is indicated
as: <Space>. The purpose of the < > brackets is to ensure you press the spacebar when
required.
Enter Indicates you must press the “Enter” or “Return” key on the keyboard. Do not type “enter”.

1-4 MAC1200 resting ECG analysis system Revision D
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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
A22 May 2007 Initial release of this manual.
B31 August 2009 Updated schematics in Chapter 10.
C14 November 2010 Revised to include services disclaimer addendum.
D15 August 2014 Updated for RoHS regulatory non-compliance.

Revision D MAC1200 resting ECG analysis system 1-5
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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:
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.
International USA
Automatic 12-lead
Manual 6-lead
Arrhythmia Arrhythmia

1-6 MAC1200 resting ECG analysis system Revision D
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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.
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
Device Device
Model Manufacturer ID Keypad Labeling Mains Voltage
MAC1200
MAC1200 ST INT GE Medical
Systems Icons International 230V
MAC1200
MAC1200 ST Europe 2 GE Medical
Systems Text International 230V
MAC1200
MAC1200 ST USA GE Medical
Systems Text USA 115V
MAC1200 RUSS GE Medical
Systems Kyrillian International 230V
MAC1200 ST Japan GE Medical
Systems Japanese International 230V
MAC1200 Pharma GE Medical
Systems Text USA 115V

Revision D MAC1200 resting ECG analysis system 1-7
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The Basics: Block Circuit Diagram of Entire Instrument
Block Circuit Diagram of Entire Instrument
MAC 1200 (US), Version 6.2
ECG
Input
RS232
Interface
Line
Power
Input
PCB Control SC_CI
Modem Supply
Boot Loader
Program
Memory
Configuration
Memory
Internal
RAM ECGRAM
Buffered RS232
Driver
Keypad
Interface
Display
Interface
Display
Supply
Motor
Control
Thermal
Pinhead
Control
Device
On/Off
Control
Logic Supply
+5 V +3.3 V
Analog
Supply
Printhead
Supply
Real Time
Clock
Buffered
Controller
Core
ECG
Acquisition
and
Conditioning
NC Battery
PCB NC
Battery
Charge
Switching
Power
Supply
+26.5 V
Line Power
Input with
Fuse
Printing Unit
Thermal Printhead
Motor
LCD Graphics Display
1/4 VGA Monochrome
Keypad
Pump Interface
(not in US
Device)
Option Pump
(Not in US Device)
Line Power, NC Battery

1-8 MAC1200 resting ECG analysis system Revision D
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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.

Revision D MAC1200 resting ECG analysis system 2-1
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2Functional Description

2-2 MAC1200 resting ECG analysis system Revision D
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For your notes