marquette hellige MicroSmart Benutzerhandbuch
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
Marquette Hellige GmbH MicroSmart V 2.xx Page 2
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
Marquette Hellige GmbH MicroSmart V 2.xx Page 4
Servicing Instructions 227 470 35 B - 97.12
1 Documentation and nomenclature of Marquette Hellige instrument part Nos
1.1 Configuration of instrument part No
The instrument part No comprises 8 digits, the first 6 digits determining the instrument type, the last
2 digits the instrument version. The language is determined by configuration, thus having no
influence on the part No.
E.g. Instrument Type Version
MicroSmart without measurement, IR 101 134 01
MicroSmart with measurement, IR 101 134 02
1.2 Configuration of the PCB part Nos
388 xxx yy Spare part numbers for the operative PCBs.
The instrument documentation, e.g., reference diagrams, circuit diagrams and parts lists are listed
under this part No.
The 388 number is located on the barcode label.
Configuration of the barcode labels:
Marquette Hellige GmbH MicroSmart V 2.xx Page 5
Servicing Instructions 227 470 35 B - 97.12
303 xxx yy Spare part numbers for PCBs tested especially thoroughly
303 numbers are only given to PCBs where the level of testing applied to 388 PCBs is inadequate
for implementation when servicing in the field, or where only a complete set of PCBs can be
replaced in the field.
In addition to a barcode label (388 number) 303 part Nos also have an additional label with a 303
number and are to be found in the spare parts list under this number.
389 xxx yy Replacement numbers for defective PCBs
Where servicing is required 389 PCBs are available for the replacement of some PCBs. When using
a replacement PCB (389 part No) the defective PCB is to be returned to the Freiburg factory.
Replacement PCB part Nos are included in the spare parts list.
389 PCBs have an additional adhesive label.
1.3 Instrument status documentation (nominal status)
Due to the hardware and software combination unambiguous documentation of the instrument
assembly status is necessary, also in the event of repairs.
This documentation comprises the following documents and measures:
Master Record Index (MRI)
This document is a component of this instrument documentation.
This document states the combination of permissible hardware and software for a particular
instrument version. The permissible PCB Index is given in the “Index” column with each update
delivered. Further permissible PCB Indexes are given in the “compatible” column. The PCB Index
can be found in the PCB barcode label.
Product Status Index
This document is created during manufacture. The Product Status Index documents the
hardware/software product status.
Marquette Hellige GmbH MicroSmart V 2.xx Page 6
Servicing Instructions 227 470 35 B - 97.12
2 Description of the unit
These service instructions for the V2.x version of the unit describe both the MicroSmart as well as
the MicroSmart MC. Unless a note appears to the contrary, this description applies to both the
MicroSmart and the MicroSmart MC.
MicroSmart is a portable cardiograph with integrated printer drive. It is designed to record, register
and process ECG signals. It is designed both for mains and battery operation, operation without
battery is also possible. A power supply unit and battery are integrated in the unit.
MicroSmart MC also includes in the "Auto" mode the measurement of the ECGs and registration
of the measurement results.
MicroSmart und MicroSmart MC are based on the same hardware platform.
The following versions of MicroSmart are available:
101 134 01 MicroSmart (international) 100...240V~
101 134 02 MicroSmart MC (international), measurement + IR 100...240V~
101 134 03 MicroSmart (Asia) 100...240V~
101 134 04 MicroSmart M (USA), measurement 100...240V~
101 134 05 MicroSmart MC (Asia), measurement + IR 100...240V~
101 134 06 MicroSmart (USA) 100...240V~
101 134 07 MicroSmart (inter. 5-pin) 100...240V~
The hardware consists of the following function blocks:
- MicroSmart PCB
- power supply module
- battery
- keyboard
- printer drive
The following function blocks are implemented as PCBs.
- MicroSmart PCB
- power supply
The patient input, which is a component of the MicroSmart PCB, is mounted on the power supply
module and connected to the MicroSmart PCB via a flexible supply line.
The intended use, the functions available and operation of MicroSmart are described in the
instructions for use.
Marquette Hellige GmbH MicroSmart V 2.xx Page 7
Servicing Instructions 227 470 35 B - 97.12
2.1 Block diagram, total unit
AC/DC
Battery
System inlet
Patient input
Lpl. MicroSmart
LC-Display
IRDA-
interface
Pre-amplifier
optical
coupler
DC/DC
ASIC3
ASIC2
ASIC1
ASIC1
DC/DC 5V
DC/DC 24V
MC68332
EPROM
RAM
EEPROM
Uhr
Panel-
interface Display-
interface Recorder-
interface
Battery
charge
Operator panel Recording
section
Marquette Hellige GmbH MicroSmart V 2.xx Page 8
Servicing Instructions 227 470 35 B - 97.12
2.2 Mechanical structure
The major mechanical components of MicroSmart are the top and bottom shell. The bottom shell
is the basic element carrying the following sub-assemblies:
- Power supply module with system inlet, power supply unit and patient input.
- Battery
- Thermal array drive with paper magazine
- PCB MicroSmart with display
The top shell holds the keyboard which is linked to the PCB MicroSmart via a flexible cable.
The 15-pin inlet plug for connecting the patient lead is located at the power supply module. It is
linked to the PCB MicroSmart via a flexible cable.
3 Description of the function
The description of the individual function blocks follows the Block diagram of the total unit in
chapter 1.1 and the function blocks of the P plans.
3.1 Power supply module
The power supply module comprises the following functions:
- System inlet with fuses
- Extended range power supply
- Patient input
These components are mounted on a carrier plate bolted into the bottom shell of the enclosure.
3.1.1 System inlet
The system inlet is defined as a system inlet module. It includes a three-pin IEC plug and two size
5 X 20 fuses accessible from the outside. The module is a component with snap-type function.
The system inlet is designed as "Universal Input", with the effect that no adjustment to the system
voltage ranges 100V~ ... 120V~ or 220V~ ... 240V~ is required.
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