ECG (or Electrocardiographs) machines are used to monitor the electrical activity of the heart and display it on a small screen or record it on a piece of paper. The recordings are used to diagnose the condition of the heart muscle and its nerve system.

1. Health technology is defined by the
World Health Organization as the "application of organized
knowledge and skills in the form of devices, medicines,
vaccines, procedures, and systems developed to solve
a health problem and improve quality of lives“

2. ECG MACHINE-Introduction and Maintenance
Health Technology Management Series

15. PRECORDIAL LEADS

20. User Maintenance Check List
DAILY
Cleaning  Clean off dust with dry cloth and replace dust
cover
Visual checks  Check that battery charge indicator, power
indicator and patient cable connector indicators
are working
Function checks  Check the calibration of machine before use
using 1mV pulse
 Check the baseline of the ECG recording is steady
 Check the printing is clear

21. User Maintenance Check List
WEEKLY
Cleaning  Clean the printing head
Visual checks  Check all cables are not bent, knotted or
damaged
 Replace any damaged electrical plugs,
sockets or cables
 Check all knobs, switches and indicators
are tightly fitted
Function
checks
 Check the calibration of recordings with
ECG simulator
 Check battery power can operate the
equipment

22. Troubleshooting
Symptoms Possible Cause Solution
The ECG machine fails
to start up. AC LED or
battery LED
does not light
AC power not connected
or
battery too low
-Check that AC power is
properly connected or
battery capacity is
sufficient
Cables defective or poorly
connected
-Check that the cable
between power switch
and Keyboard is correctly
connected.
-Check that cables and
connectors are not
damaged.
AC adapter defective Replace AC adapter
Main board defective Replace main board or
Ref to Biomedical eng
Keyboard defective Replace keyboard or Ref
to Biomedical eng

23. Troubleshooting
Symptoms Possible Cause Solution
Integrated display is blank
but the ECG machine still
works correctly.
Cables defective or poorly
connected.
-Check that cable between
the display and the main
board is correctly connected.
-Check that the cables and
connectors are not damaged.
LCD display defective Replace the LCD display or
refer to biomedical Engineer
Touch screen does not
response (if touch screen
machine)
Cables defective or poorly
connected.
-Check that the cable
between the display and
main board is correctly
connected.
-Check that the cables and
connectors
are properly connected
Touch screen defective -Replace touch screen or ref
to biomedical engineer
Touch position invalid Touch screen not
calibrated
Calibrate the touch screen
from internal setting of ECG
machine

24. Troubleshooting
Symptoms Possible Cause Solution
No printout Cable defective or
poorly
connected
-Check that cable
between recorder
and mother board is
properly connected.
-Check that
connecting cables
and connectors are
not damaged.
Recorder failure Replace the recorder
or ref to biomedical
engineer
Main board failure Replace the main
board or ref to
biomedical Engineer

25. Troubleshooting
Symptoms Possible Cause Solution
Poor print quality or
paper not
Feeding properly
Paper roll not properly
installed
Stop the recorder and re-
install the paper roll.
Print head dirty -Check that objects in
thermal print head and shaft.
-Clean the thermal print
head with an appropriate
clean solution.
Print head failure Replace the print head.
Recording paper not
detected
1. Thermal paper not
properly installed.
2. Cable from sensor to
main board poorly
connected.
3. Sensor board failure.
4. Main board failure.
1. Re-install paper
2. Re-connect the cable
between sensor and main
board.
3. Replace the sensor board.
4. Replace the main board.

26. THANK YOU