How to troubleshoot PWR LED being off on TTC Control Unit?
If the PWR LED is off on your TTC Control Unit, there are several things you can check: * Verify the power supply NP107, ensuring it provides –48 V DC and +5 V DC. * Confirm that the program memory is correctly installed, especially after firmware upgrades. * Ensure the PBS is correctly installed, particularly after removal. * Consider replacing the PBS if the problem persists.
What to do if ERR LED is Red on TTC PCM30U?
If the ERR LED on your TTC Control Unit is red, consider the following troubleshooting steps: 1. Check the 2 Mbps stream; the CJAB should be green. 2. Verify the PBS identification; Doris will display an urgent alarm if there's an identification mismatch. 3. Confirm the PBS number of used timeslots (common setting is 2) and the timeslot arrangement (commonly interlaced). 4. Ensure the originating timeslot matches the opposite unit, especially when a cross-connect is not used. 5. Check the opposite PBS and make sure the cross-connect is working correctly. 6. As a last resort, consider replacing the PBS.
What to do if IN 1-10 LED is Yellow and flashing quickly on TTC Control Unit?
If the IN 1÷10 LED is flashing quickly in Yellow on your TTC Control Unit, you should check the cross-connect and try running a test.
What to do if TEST LED is Orange and flashing on TTC PCM30U Control Unit?
If the TEST LED is flashing Orange on your TTC Control Unit, press the TEST button to acknowledge the test failure. Then, look for flashing IN and OUT LEDs to identify where the test failed. Check the routing commands and membership in groups (A, B) at both this and the opposite PBS.
How to fix ERR LED flashing red on TTC PCM30U Control Unit?
If the ERR LED is flashing red on your TTC Control Unit, reconfigure the unit. Fill all configuration cards in Doris and use the “set all” function.
Why is the LED indication opposite of what I expect on TTC PCM30U Control Unit?
The PBS may remember a pre-error state or return to idle when the ERR LED is Red. Check the AND and OR functions at the inputs of your TTC Control Unit.
General| Brand | TTC |
|---|---|
| Model | PCM30U |
| Category | Control Unit |
| Language | English |
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