marquette hellige MicroSmart User guide

Servicing Instructions
MicroSmart
Version 2.xx
227 470 35B - SA (e)

Caution:
During repairs/service interventions,
observe the protective measures against
damage due to ESD.
* Marquette Hellige GmbH considers itself
responsible for the effects on safety,
reliability, and performance of the equip-
ment,onlyif:
- assembly operations, extensions,
readjustments, modifications, or
repairs are carried out by
Marquette Hellige GmbH or by
personsauthorizedbyMarquette-
Hellige GmbH,
- the electrical installation of the rele-
vant room complies with the applica-
ble 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
instrumentatprinting date.
* All rights are reserved for instruments,
circuits, techniques, and names appearing
in the manual.
©Marquette Hellige GmbH
Printed in Germany

Marquette Hellige GmbH MicroSmart V 2.xx Page 1
Servicing Instructions 227 470 35 B - 97.12
Contents
1 Documentation and nomenclature of Marquette Hellige instrument part Nos ........... 4
1.1 Configuration of instrument part No ............................... 4
1.2 Configuration of the PCB part Nos ................................. 4
1.3 Instrument status documentation (nominal status) ....................... 5
2Descriptionoftheunit................................................ 6
2.1 Block diagram, total unit ....................................... 7
2.2 Mechanical structure .......................................... 8
3Descriptionofthefunction ............................................ 8
3.1 Power supply module .......................................... 8
3.1.1 System inlet .......................................... 8
3.1.2 Extended range power supply .............................. 9
3.2 Battery .................................................... 9
3.3 Printed circuit board (PCB) MicroSmart ............................ 10
3.3.1 Voltage supply and monitoring ............................ 11
3.3.2 Computer .......................................... 15
3.3.3 ECG recording and pre-processing ......................... 19
3.3.4 Drive electronics and display ............................. 24
3.4 Internal interfaces ........................................... 28
3.4.1 Interface, power supply ................................. 28
3.4.2 Interface, display ..................................... 29
3.4.3 Interface, thermal array ................................. 30
3.4.4 Interface, motor ...................................... 32
3.4.5 Interface, photoelectric barrier ............................ 32
3.4.6 Interface, keyboard .................................... 33
3.4.7 Interface, ECG input ................................... 34
3.5 External interfaces ........................................... 35
3.5.1 Line inlet ........................................... 35
3.5.2 Patient input ........................................ 35
3.5.3 IR interface ......................................... 36
3.6 Delimitations .............................................. 37
4Unittestfunctions ................................................. 38
4.1 General .................................................. 38
4.2 Key test and loudspeaker test .................................... 39
4.3 Display test ................................................ 39
4.4 Motor test ................................................. 39
4.5 Recording test .............................................. 40
4.6 IR test (MicroSmart MC only) ................................... 40
4.7 Recording the results ......................................... 40

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Servicing Instructions 227 470 35 B - 97.12
4.7.1 Error codes .......................................... 41
4.8 Additional functions for final test ................................. 42
4.9 Re-locking option ............................................ 43
5Selectingthetypeofappliance ........................................ 44
5.1 General .................................................. 44
5.2 Selecting the type of appliance .................................. 45
6Repairnotes ..................................................... 46
6.1 Safety notes ............................................... 46
6.2 Component replacement ....................................... 46
7 Troubleshooting ................................................... 49
8Maintenanceandcare ............................................... 51
8.1 Technical inspection ......................................... 51
8.1.1 Visual checks ........................................ 51
8.1.2 Function checks ...................................... 52
8.2 Safety Analysis Test .......................................... 55
8.2.1 General Information .................................... 55
8.2.2 Protective earth resistance test ............................. 55
8.2.3 Measuring of leakage current ............................. 56
8.2.4 Enclosure Leakage Current Test ............................ 56
8.2.5 Patient Leakage Current Test .............................. 57
8.3 Maintenance, cleaning, disinfection ................................ 58
9Technicaldescription ............................................... 59
10Sparepartslist ................................................... 65
11Appendix ...................................................... 68

Marquette Hellige GmbH MicroSmart V 2.xx Page 3
Servicing Instructions 227 470 35 B - 97.12
Revision History
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 revision of the document.
The revision history of this manual is summarized below.
Date Revision Remarks
September 1997 A Initial release of Dervicing Instructions
November 1997 B Update type of appliance, changed partnumber
of the PCBs