GE MAC 1200 User guide

MAC 1200
Servicing Instructions
Version 1.2
227 492 21 ENG Revision F
GE Medical Systems
Information Technologies

Caution:
During repairs/service interventions, observe the protective measures against damage due to
ESD.
GE Medical Systems Information Technologies considers itself responsible for the effects on
safety, reliability, and performance of the equipment, only if:
- assembly operations, extensions, readjustments, modifications, or repairs are carried out
by
GE Medical Systems Information Technologies or by persons authorized by GE Medical
Systems Information Technologies,
- the electrical installation of the relevant room complies with the applicable national and
local requirements, and
- the instrument is used in accordance with the instructions for use.
This manual contains service information; operating instructions are provided in the operator’s
manual of the instrument.
This manual is in conformity with the instrument at printing date.
All rights are reserved for instruments, circuits, techniques, and names appearing in the manual.
Trademarked names appear throughout this document. Rather than list the names and entities that own the
trademarks or insert a trademark symbol with each mention of the trademarked name, the publisher states
that it is using the names only for editorial purposes and to the benefit of the trademark owner with no
intention of improperly using the trademark.
900 SC, ACCUSKETCH, AccuVision, APEX , AQUA-KNOT, ARCHIVIST, Autoseq, BABY MAC, C Qwik
Connect, CardioServ, CardioSmart, CardioSys, CardioWindow, CASE, CD TELEMETRY, CENTRA, CHART
GUARD, CINE 35, COROLAN, CORO, COROMETRICS, Corometrics Sensor Tip, CRG PLUS, DASH,
Digistore, Digital DATAQ, E for M, EAGLE, Event-Link, FMS 101B, FMS 111, HELLIGE, IQA, IMAGE STORE,
INTELLIMOTION; LASER SXP; MAC; MAC-LAB; MACTRODE; MARQUETTE; MARQUETTE MAC;
MARQUETTE MEDICAL SYSTEMS, MARQUETTE UNITY NETWORK, MARS, MAX, MEDITEL, MEI, MEI in
the circie logo, MEMOPORT, MEMOPORT C, MINISTORE, MINNOWS, Monarch 8000, MULTI-LINK,
MULTISCRIPTOR, MUSE, MUSE CV, Neo-Trak, NEUROSCRIPT, OnlineABG, OXYMONITOR, Pres-R-Cuff,
PRESSURE-SCRIBE, QMI, QS, Quantitative Medicine, Quantitative Sentinel, RAC, RAMS, RSVP, SAM,
SEER, SILVERTRACE, SOLAR, SOLARVIEW, Spectra 400, Spectra-Overview, Spectra-Tel, ST GUARD,
TRAM, TRAM-NET, TRAM-RAC, TRAMSCOPE, TRIM KNOB, Trimline, UNITY logo, UNITY NETWORK, Vari-
X, Vari-X Cardiomatic, VariCath, VARIDEX, VAS, and Vision Care Filter are trademarks of GE Marquette
Medical Systems, Inc., registered in the United States Patent and Trademark Office.
12SL, 15SL, Access, AccuSpeak, ADVANTAGE, BAM, BODYTRODE, Cardiomatic, CardioSpeak, CD
TELEMETRY®-LAN, CENTRALSCOPE, Corolation, EK-Pro, EDIC, Event-Link Cumulus, Event-Link Cirrus,
Event-Link Nimbus, HI-RES, ICMMS, IMAGE VAULT, IMPACT.wf, INTER-LEAD, LIFEWATCH, Managed Use,
MARQUETTE PRISM, MARQUETTE® RESPONDER, MENTOR, MicroSmart, MMS, MRT, MUSE CardioWindow,
NST PRO, NAUTILUS, OCTANET, 02 SENSOR, OMRS, PHi-Res, Premium, Prism, QUIK CONNECT V. QUICK
CONNECT, QT Guard, SMARTLOOK, SMART-PAC, Spiral Lok, Sweetheart, UNITY, Universal, Waterfall, and
Walkmom are trademarks of GE Medical Systems Information Technologies, \nc.
Copyright 2002 GE Medical Systems Information Technologies GmbH

GE Healthcare
Service Calls and Product Support
Instructions
PN 403409-009
How To Reach Us...
To open a service call or obtain product support call the numbers below:
800.558.7044 (US & Canada)
Outside the US, contact your local GE representative or distributor.
For other product information please contact one of the offices listed on the
back cover of the manual.
Ordering Accessories and Service Parts
Ordering Manuals
Other Questions or Problems
Order accessories (leadwires, electrodes, recording papers, etc.) or service
parts (manuals, circuit boards, cables, software, etc.) from:
Accessories and Supplies
GE Healthcare
8200 West Tower Avenue
Milwaukee, WI 53223
Telephone: [phone] (US only)
414.355.5000 (outside US)
Fax: [phone]
Service Parts
GE Healthcare
P.O. Box 9100, 100 Marquette Drive
Jupiter, FL 33468-9100
Telephone: [phone] (US only)
561.575.5029 (outside US)
Fax: [phone] (US only)
561.575.5050 (outside US)
Have the following information available before calling:
part number of the defective part, or
model and serial number of the equipment,
part number/name of the assembly where the item is used, and
item name.
When ordering additional operator manuals, be sure to include the software
version of the product.
For additional information contact one of the offices listed on the back cover
of the manual or visit our website at http://www.gehealthcare.com.
403409-009H
5 January 2006
How to Reach Us 1

GE Medical Systems information Technologies
8200 W. Tower Ave., Milwaukee, WI 53223 U.S.A.
© 2006 General Electric Company. All rights reserved.
GE Medical Systems Information Technologies, a General Electric Company, going to market as GE Healthcare.
How to Reach Us 403409-009H

GE Medical Systems MAC 1200 V 1.2 Page 3
Information Technologies 227 492 21 Rev F
1
Device description 7
1.1 Block circuit diagram of entire instrument
12 Mechanical components 9
2 Functional description 11
21 Switching power supply 11
22 PCB NC Battery Charge 11
2.2.1 Charging circuit for the NC battery 11
2.2.2 Device behavior depending on the state of battery charge 12
23 PCB Control CS CI 12
2.3.1 Generation of internal power supplies 12
2.3.2 Switch On/Off circuit 13
2.3.3 ECG recording and front-end processing, 14
2.3.4 Controller core. 14
2.3.5 Real time clock 15
2.3.6 Memory 16
2.3.7 LCD graphics display interface 16
2.3.8 Keypad interface 17
2.3.9 Printhead control 17
23.10 Motor control 18
2.3.11 RS-232 interface 19
2.3.12 Buzzer 19
2.4 PCB Modem Supply CS M 19
2.5 Internal interfaces 19
2.5.1 Mechanical interfaces 19
2.5.2 Electronic interfaces 20
2.5.2.1 Interface to the switching power supply 20
2.5.2.2 Interface to the PCB NC battery charge 20
2.5.2.3 Interface to the LCD Graphics Display 22
2.5.2.4 Interface to the keypad 22
2.5.2.5 Interface to the printhead 22
2.5.2.6 Interface to the motor 23
2.5.2.7 Interfaces for production tests 24
2.5.2.8 Interface to PCB Modem Supply CS M 25
2.6 Interfaces to peripherals 26
2.6.1 Electronic interfaces 27
2.6.1.1 RS-232 interface 27
2.6.1.2 Patient input 28
2.7 Software Updates 29
2.8 Limitations 29
3 System test functions 31
3.1 General information 31
3.2
Test
start
31
3.3 Display test 32
3.4 Keyboard test
33

GE Medical Systems MAC 1200 V 1.2 Page 4
Information Technologies 227 492 21 Rev F
3.5 Motor test 33
3.6 Test results 34
3.7 Self-test 34
3.8
Recording test 35
3.9 V24 tests 35
3.10 Time and date 37
3.11 Electrode test 37
3.12 Time constant 38
3.13 Setting the device model 38
3.14 Switching over the program for interpretation 40
3.15 Pace enhance 41
3.16 Serial number 41
3.17 ACI-TIPI 41
4 Repair instructions 43
4.1 Safety instructions 43
4.2 Replacing components 43
5 Troubleshooting tips 47
6 Adjustment instructions 51
7 Servicing and maintenance 53
7.1 Technical inspection 53
7.1.1 Visual check 53
7.12 Test functions 54
7.1.2.1 Recommended testing instruments and accessories 54
7.1.2.2 Test preparations 54
7.1.2.3 Operating and display unit performance tests 54
7.1.2.4 Test for recording speeds 25 and 50 mm/s 55
7.1.2.5 Device Test result check 55
7.1.2.6 RS-232 interface test 55
7.1.2.7 Analysis of the ECG signals and HR value 55
7.1.2.8 Pacemaker identification test 56
7.1.2.9 Identification of disconnected electrodes 57
7.1.2.10 Checking the charge status of the NC battery 57
7.1.3 Safety Analysis Tests 57
7.1.3.1 General information 57
7.1.3.2 Protective Earth Resistance Test 58
7.1.3.3 Measurement of Leakage Current 58
7.1.3.3.1 Enclosure Leakage Current Test 58
7.1.3.3.2 Patient Leakage Current Test. 59
7.2 Maintenance, cleaning, disinfection 60

GE Medical Systems
Information Technologies
8 Parts List
9 Specifications
MAC 1200 V 1.2
227 492 21 Rev F
Page 5
61
65
10 Device Documents
73

GE Medical Systems
Information Technologies
Revision History
MAC 1200 V 1.2
227 492 21 Rev F
Page 6
Each page of this manual has the document number followed by a revision letter, located
at the top of the page. This letter identifies the manual update level. The latest letter of the
alphabet corresponds to the most current version of the document.
The revision history of this manual is summarized below.
Date ECO No Revision
March 05,1999 -- Α
May 10, 1999 062 136 B
June 29, 1999 062727 C
February 4, 2000 062920 D
January 9, 2002 068851 F
Remarks
V 1.0, initial release
Software Package for
MAC 1100/1200 (Software change) page
55, new MRI
Pin 4— Coding pin, page 19,
Supplementation to chapter 3.4; page 29
Software Release V 5.02 page 55,new MRI,
PCB Control CS CI, Sheet 9 new Index
PCB Control CS C, new Index
PCB Battery Charge CS CI, new Index
Device Version V1.1 with Remote
Start Input, internal Modem Supply and
Software Release V5.1
Software Release V5.21 for MAC1200

GE Medical Systems MAC 1200 V 1.2 Page 7
Information Technologies 227 492 21 Rev F
1 Device description
This Service Manual describes device version V1.2 of MAC1200
The MAC 1200 is portable electrocardiograph with an integrated printing unit.
it is used to acquire, record and process ECG signals.
It is designed for line-power and battery operation. A power supply and battery with a
charging circuit are integrated into the instrument.
The integrated LCD graphics Display shows 3 ECG channels. It also displays status
information, filter settings, speed/format, gain and the status of the electrodes.
With the setup feature, the user is able to setup the device and the modes for his own
needs.
The patient cable for the acquisition of ECG signals is connected by means of a 15-pin
connector as used with MAC 500. Patient cables used with MAC 1000 cannot be
connected to the MAC 1200.
In Automatic Mode, the acquired ECGs can be transmitted to MUSE or a PC via an RS-232
interface. With the additional option Patient Memory, all acquired ECGs can be transmitied.
MAC1200 with version V1.1 has all features of the version V1.0 described above,
additionally version V1.1 has a Remote Start Input, an internal Modem Power Supply
and the new Software Release V5.1.
Device Part number Name Supply Voltage Remarks
Version
V1.2 101 168 23 MAC 1200 95 ... 240V ac US version
Hardware functional blocks:
The hardware comprises the following main functional blocks:
m Switching power supply
m NC Battery
m PCB NC Battery charge
m PCB Control CS CI
m PCB Modem Supply CS M
E Printing unit
m Keypad
= % VGA graphics display, monochrome

GE Medical Systems
Information Technologies
MAC 1200 V 1.2 Page 8
227 492 21 RevF
1.1. Block circuit diagram of entire instrument
MAC1200 (US), Version V1.1
| |
PCB Modem Supply
Modem Supply
Programm
Memory
Boot
Internal
ECG RAM
Loader
RAM
buffered
Configuration
ECG
Input
Line
Power E
Input
RS232 | | RS232
Memory Driver Interface
Keypad
Interface Keypad
Display LCD Graphics Display
ECG Interface 1/4 VGA Monochrome
AS Display
Acquisition Controller Supply
"| and Core
Conditioning
Motor
Control Motor
Real Time
Clock Thermal i
buffered Pinthead Thermal Printhead
Control
Printing Unit
Logic Supply
+5V_+3.3V ,
Device
Analog Supply On/OFF
Printhead Control
Supply
PCB Control CS CI
Line Power
Input ーー] NC Battery
with Fuse
Ñ MAC1200 (US)
Switching PCB
Power Supply NC Battery V 1.1
+26,5V Charge 14.01.2000
Line Power, NC Battery