User's Guide Part 2

User Guide: PTP 600 Series Test link end hardware
phn-0896_009v003
Feb 2010
UNDER DEVELOPMENT
7-5
Power LED is off
If the Power LED is not on solid or flashing, proceed as follows:
Procedure 7-3 Test the power supply
1
Remove the power lead from the PIDU Plus.
2
Test that the power supply (mains or 56 V battery) is working.
3
If the power supply is not working, investigate the cause.
If the power supply is working, proceed as follows:
Procedure 7-4 Remove ODU cable from PIDU Plus
1
Open the flap on the left hand side of the PIDU Plus.
2
Remove the ODU cable from the PIDU Plus.
3
Observe the effect on the Power LED; does it illuminate?
If the Power LED does not illuminate when the ODU cable is removed, proceed as
follows:
Procedure 7-5 Power LED does not illuminate when ODU cable is removed
1
Measure the voltage across the +55 V and 0 V pads inside the PIDU Plus flap.
If the voltage is incorrect, it indicates that the PIDU Plus is short-circuited.
Report a suspected PIDU Plus fault to Motorola.
2
Measure the impedance across the Power connector.
If the impedance is incorrect, it indicates that the PIDU Plus is short-circuited.
Report a suspected PIDU Plus fault to Motorola.
3
If both of the above tests produce correct readings, it is likely that the PIDU
Plus Power LED is faulty. Report a suspected PIDU Plus fault to Motorola.