M4Medical M-TRACE User manual

M - T R A C E E C G A P P L I A N C E
Service Manual and Repair Guide
E D I T I O N 1 . 0 2
M4Medical Sp. z o. o.
10/7 Ogrodowa Street
Lublin, PL 20-075
Phone/Fax [phone] • Cell [phone]
E-mail: [email protected]
Revisions:
Pre-release edition

M-TRACE – SERVICE MANUAL (1.0
2
General information
Precautions, Technical Specification, Tools and Parts
To keep the maintenance and repair process correct and faultless it is essential to meet the
information enclosed in this manual and follow them during everything you do with the ECG
appliance, before any action or activity is taken.
Precautions and Safety
Familiarizing with the safety basics is the most vital to avoid any disturbing and unexpected cases
during service maintenance process of the ECG appliance. It also has a purpose to keep the
technical personnel away from any danger and unnecessary complications.
To make it easy, read and follow the information below:
•First of all, one is to ensure that work stand is clean, well ventilated, and lamp-lit properly.
•All the operations should be performed by personnel, skilled at electronics and electricity
basics, equipped with necessary tools.
•Before performing any maintenance, servicing or repairing actions personnel should be
trained in by manufacturer according to the servicing duties regarding the M-TRACE
appliance.
•Hygiene precautions are vital. Handling the product, keep your hands and working surfaces
clean of any dirt, dust, debris and hand oil.
•Before removing the external cover, disassembling or making any mechanical maintenance
– disconnect the appliance from external power source by turning off the main switch on the
back of it located just by the power socket and unplugging main power cord from it. If any
specific operation requires the appliance to be connected to mains please DO FOLLOW
STRICTLY THE INSTRUCTIONS INCLUDED IN THE RELAYING PARAGRAPH
OF THIS MANUAL.
To get any necessary, and not included in this publication user's maintenance instructions, please
refer to most-up-to-date user's manual. To get the latest information contact the manufacturer as
well.

M-TRACE – SERVICE MANUAL (1.0
3
Tools
M-TRACE is characterized by simple, modular construction, however upon maintaining any
service process some certain tools might be found helpful.
Here’s the list with tools which might be required to perform any maintenance described in this
manual:
PH1 (Phillips type) magnetic-tip screwdriver Square-tip screwdriver
Pliers Tweezers
Pen-drive
Multimeter

M-TRACE – SERVICE MANUAL (1.0
4
Technical specification
Appliance description
M-TRACE electrocardiograph is a sophisticated and modern electronic device. It is dedicated to
record ECG impulses in full range of 12 standard channels. Printout is made on thermal paper. The
device is equipped with high resolution linear thermal printing unit and color LCD. The built-in
battery allows to use it quickly wherever it is necessary. Aesthetic plastic cover together with
membrane keyboard makes the device easy to keep clean.
Specification
Dimensions (W x H x D) 60 W x 52 H x 220 D mm
Weight <1,5 kg
Power supply AC 90-240 V @50-60 Hz
Built-in battery Li-ion 7,2 V 2,2 Ah
Can be replaced only by qualified servicing personnel
Power consumption <35 VA
ECG leads 12 Standard ECG leads:
•Einthoven’s limb leads I, II, III
•Goldberger’s limb leads aVR, aVL, aVF
•Wilson’s precordial leads V1, V2, V3, V4, V5, V6
Sensitivity 2,5/5/10/20 mm/mV 5%
Recording speed 5/10/25/50 mm/s 5%
Common Mode Rejection Ratio >100 dB
Frequency band 0,05-150 Hz
Input impedance >10 MΩ
Control range >300 mVpp
10 mVpp
Resolution 2,5 µV
Sampling frequency 1000 Hz
Digital filters 50Hz, 60Hz, 35Hz, 25Hz, anti-drift
LCD screen Color graphic display, 320x240
Safety Protection Type CF (EN60601-1) Class I
Protector Class II (EN60601-1)
Class / Group Class A / Group 1 (CISPR-11)
Operating environment Temperature: +10 to +40˚C (+50 to +104˚F)
Conditions Relative Humidity: 25 to 95% (non-condensing)

M-TRACE – SERVICE MANUAL (1.0
5
M-TRACE unit top view

M-TRACE – SERVICE MANUAL (1.0
6
M-TRACE unit's structure
Both external (power grid) and internal (built-in battery) sources are used to power the appliance.
Battery charger is integrated with the mainboard. It is vital to notice the right internal battery type
during its replacing. Using any but the right one can cause bad damage done by explosion being
natural behaviour for Li-ion type cells that are wrongly matched or not properly installed. Li-ion
type batteries are highly fragile to overcharging so be sure the required parameters of the mounted
one are strictly met. The built-in power supply unit delivers DC 9 V to its output connector. It is
wired to mainboard where the proper elements produce all the other voltage levels required by the
M-TRACE to be fully operational.
There are four following major voltage converters responsible for the above:
Voltage level Powered sections
DC 3,3 V Most of the digital elements
DC 5 V
•
Printing thermal head
•USB controller
DV 1,5 V FPGA on-board programmable logic
DC 10,4 V LCD backlit
Directly from power supply unit output
or from internal battery
•
Thermal printer's motor drive
•Analog amplifier's board
ECG signals, collected from patient, after being amplified by amplifiers and AD converted on
analog board, are passed using SPI opto-isolated (which is eligible and essential to separate patient
from the device's circuits) transmission to mainboard.
Mainboard's duties are to keep all the internal modules communication running properly, analyse
and show all the computed data and interact with the user and patient.
None of the components requires any adjustments or tuning. All of them are ready instantly to serve
as properly assembled and powered.
Parts list
No. Part Symbol
1. Power supply unit MBU30-104
2. Analog amplifiers module X300-20-xx
3. Mainboard X300-10-xx
4. Thermal printer LTPV-445
5. Battery CGR18650CF-2S1P-PCB 7,2 V 2,2 Ah
6. LCD screen AM-320240N1TMQW-30H
7. Keyboard
8. Power socket
9. Casing

M-TRACE – SERVICE MANUAL (1.0
7
Power supply unit MBU30-104
P1 connector: AC 90-240 V input
Pin Symbol Description
1 L Power line L (live)
2 N Power line N (neutral)
P2 connector: DC 9 V output
Pin Symbol Description
1 +9 V +U power supply
2 +9 V +U power supply
3 +9 V +U power supply
4 GND
5 GND
6 GND

M-TRACE – SERVICE MANUAL (1.0
8
Analog amplifiers module - X300-20-xx
J1 DA15 type connector – patient's ECG signal cable
Pin Symbol Description
1 V2 Precordial V2 lead
2 V3 Precordial V3 lead
3 V4 Precordial V4 lead
4 V5 Precordial V5 lead
5 V6 Precordial V6 lead
6 GND Ground
7
8
9 R Right upper limb (arm) lead
10 L Left upper limb (arm) lead
11 F Left lower limb (leg) lead
12 V1 Precordial V1 lead
13
14 N Right lower limb (leg) lead
15

M-TRACE – SERVICE MANUAL (1.0
9
J2 Molex type connector – processor programming lines
J3 Molex type connector – wiring with X300-10-xx mainboard
Pin Symbol Description
1 SCLK Clock output
2 GND Ground
3 MOSI Data output
4 GND Ground
5 MISO Data input
6 ENABLE Data transmission enabling signal
7 POWEROFF Analog module on/off switching line
8 3V3 Opto-isolators power supply
9 GND Ground
10 +U power supply Voltage converter power supply

M-TRACE – SERVICE MANUAL (1.0
10
Mainboard – X300-10-xx
J1 connector Thermal printer's unit motor drive control line
J2 connector Thermal printer's unit heating head's control line
J3 connector Not connected – for future use
J4 connector USB host – External PCL5/6 printer output
J5 connector FPGA circuit programming lines
J6 connector USB slave – M-TRACE-PC data transmission
J7 connector Keyboard
J8 connector LCD data signal
J9 connector wiring with analog amplifiers module X300-20-xx (J3)
J10 connector USB host programming lines
J11 connector Internal battery socket
Pin Symbol Description
1 TERM Thermistor protector
2 GND Ground
3 +U battery Battery power supply +7,2 V
J12 connector Power supply unit socket
Pin Symbol Description
1 L Power line L (live)
2 N Power line N (neutral)
J13 connector ARM CPU programming lines
J14 connector LCD backlit power supply line