Section 2: PCB Installation and Startup
2-54 Section 2: PCB Installation and Startup Aspila EX Hardware Man-
Basic Troubleshooting
To troubleshoot extensions:
1. Verify the Run/Block switch is set in the RUN position for the PCB.
2. Check and verify extension. The ESIU PCB has test points located on the top edge of the
PCB.
3. The voltages at the extension's modular jack should be:
4. Check and verify the phone is working correctly by connecting it to another extension.
5. Check and verify programming. Refer to the Software Manual if necessary.
6. Check and verify extension wiring.
7. Check and verify cable connection of the EXIFU if two cabinets are used.
8. Check and verify the correct LED indication on the PCB.
9. Check and verify extension PCB installation.
To troubleshoot lines:
1. Verify the Run/Block switch is set in the RUN position for the PCB.
2. Check and verify each line before the system with a test set.
3. Measure loop current on each line with a digital voltmeter.
4. Check and verify programming. Refer to the Software Manual if necessary.
5. Check and verify trunk wiring.
6. Check and verify cable connection of the EXIFU if two cabinets are used.
7. Check and verify the correct LED indication on the PCB.
8. Check and verify trunk PCB installation.
9. Check and verify the proper earth grounding is made for the system.
Test Point Voltages
TP3 - TP2 -54 to -47V DC
TP1 - TP2 +3.3 to +3.5V DC
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