User's Guide Part 2

User Guide: PTP 600 Series Test link end hardware
phn-0896_009v003
Feb 2010
UNDER DEVELOPMENT
7-7
Power LED is flashing
If the green Power LED is flashing, proceed as follows:
Procedure 7-8 Power LED is flashing
1
Remove and examine the cable that connects the PIDU Plus to the LPU or ODU.
2
Check that pins 4&5 and 7&8 are not crossed with pins 1&2 and 3&6.
3
Check that the resistance between pins 1&8 is greater than 100K ohms.
4
If either check fails, replace or repair the cable that connects the PIDU Plus to
the LPU or ODU.
Ethernet LED did not flash 10 times
When the PIDU Plus is connected to the power supply and the green Power LED
illuminates, there should be a 45 second delay, following which the yellow Ethernet
LED should flash 10 times.
If the Ethernet LED did not flash 10 times, proceed as follows:
Procedure 7-9 Ethernet LED did not flash 10 times
1
Remove and examine the cable that connects the PIDU Plus to the LPU or ODU.
2
Check that the wiring to pins 4&5 and 7&8 is correct. For example, the wiring
to pins 4 and 7 may be crossed.
3
If an LPU is installed, it can be used to check that power is available on the
cable to the ODU. The connections can be accessed by rotating the LPU lid as
shown in
Figure 7-3. The Lid nut only needs to be slacken, do not remove. Test
that point P1 on the LPU PCB corresponds to pin 1 on the RJ45. Repeat for
points P2 to P8. An indication of power on the Ethernet cable is also provided
inside the LPU: the LED PWR1 should illuminate but LED PWR2 should not.
4
If either test fails, replace or repair the cable that connects the PIDU Plus to the
LPU or ODU.