Power Led Is Flashing; Ethernet Led Did Not Flash 10 Times - Motorola PTP 300 Series User Manual

9.1.2 Power LED is Flashing

If the green Power LED flashes, perform the following tests on the RJ45 cable that connects
the PIDU Plus to the LPU or ODU:
1. Check that pins 4&5 and 7&8 are not crossed with pins 1&2 and 3&6.
2. Check that the resistance between pins 1&8 is greater than 100K ohms.
3. If either test fails, replace or repair the RJ45 cable.

9.1.3 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, perform the following tests on the RJ45
cable that connects the PIDU Plus to the LPU or ODU:
1. 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.
2. 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 106 The Lid nut only needs to be slacken, do not remove. Test point P1 on the
LPU PCB corresponds to pin 1 on the RJ45 etc. An indication of power on the
Ethernet cable is also provided inside the LPU: the LED PWR1 should illuminate but
LED PWR2 should not.
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9 Troubleshooting (Fault Finding)
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