Service Setup• Modem (internal)• USB portUse the procedures in the following sections to conduct the necessary tests.Testing the COM (RS232) PortsUse the RS232 Test to determine if the COM ports are working properly.1. Open the Diagnostic Tests window as described in “System Diagnostics” onpage 46.2. Use a paper clip to short pins 2 and 3 on COM A.3. Select RS232 Test.The following window opens:4. Perform the COM Port Loop Back Test on COM A.a. Select COM A and press Enter.The results of the COM Port Loop Back Test are displayed.b. Note the results of the COM Port Loop Back Test.5. Perform the COM Port Loop Back Test on COM B.a. Use the paper clip to short pins 2 and 3 on the COM B connector.b. Select COM B, press Enter.The results of the COM Loop Back Test for COM B are displayed.c. Note the results of the COM Loop Back Test for COM B.6. When the test is done, press Esc or Cancel to close the results window.If either test failed, replace the main PWA module as described in “PWA” on page 120.Testing the LAN OptionUse the LAN Test to test wired and wireless (WiFi) network connectivity.1. Connect the device to a local area network.In the case of a wired LAN, ensure that it is connected to an active connection. Ifyou connect to an inactive network tap, the test result may be a false negative.56 MAC™ 2000 ECG Analysis System 2053535-003C
