GE MAC 5500, Service Manual

Page: 87 / 180

Revision E MAC

5500 resting ECG analysis system 4-15

2020299-020
Troubleshooting: Diagnostic Tests
External Modem Test
Connect a modem to COM 2 and select External Modem Test . The test returns the
modem ID number, firmware rev, and current parameter settings. If communication
with the modem is unsuccessful, the ID and firmware rev display
N/A .
Internal Modem Test
Select Internal Modem Test . The Internal Modem Interrogation screen displays. The
test returns the modem ID number, firmware rev, and current parameter settings. If
communication with the modem is unsuccessful, the ID and firmware rev display
N/
A . Press any key to exit this test.
Ethernet Module Test
Select Ethernet Module Test . The Ethernet Module Interrogation screen displays.
The test returns the device IP address and the subnet mask information. If the
Ethernet module test is unsuccessful, the ID and firmware rev display
N/A . Press any
key to exit this test.
Acquisition Module Test
Follow the instructions on screen.
NOTE
A shorting bar is required to perform this test.

Tests if the acquisition module is powered
 Tests if the acquisition module is communicating

Displays the acquisition module lead wire noise
 Indicates when one of the three acquisition module buttons is pressed

Displays software version of acquisition module
Analog I/O Tests
Analog Output Test
Follow the instructions on screen to monitor the analog outputs using an
oscilloscope. The outputs monitored are:

+12V
 DC Output 1

DC Output 2
 ECG Output

TTL Trigger Output
Four sets of outputs are possible. Select the output sets using the arrow pad.
For example, to test DCOut 1, connect oscilloscope to pin 2 and ground to pin 4 or 5
and select DCOut 2 0V and check oscilloscope for reading of 0 volts. repeat for
other selections. If any of these readings do not match, CPU may need to be
replaced.