ITC 220 Base Station, Locomotive & Wayside Radio Transceiver Field Service Guide PN 0046300120 Rev. A
| Page 61
6.2
POWER PROBLEMS
Problem indicators:
There is no power to the transceiver — as indicated by the PWR (Power) LED does not illuminate or blink.
The transceiver does not transmit.
The POST results show that internal voltages are low.
To troubleshoot transceiver power issues:
1.
Make sure the power cable connectors are securely connected to the power supply and to the transceiver.
2.
Make sure the power cable polarity is correct: the wire for positive connection is connected to the unit’s positive
(+) terminal and the wire for negative connection is plugged into the negative (–) terminal. See the power cable
diagram that is applicable to the radio transceiver in
D.1 Transceiver Power Cables
.
3.
Check that the power supply is turned on. If it is off, then turn it on. Verify that the breaker does not trip on power
up.
4.
Adjust the power supply to within the rated operating voltage.
5.
Verify that the current limit on the power supply meets the maximum current draw. Refer to the applicable Input
Power Parameters table in the
Required Equipment
section.
6.
Replace the power cable.
7.
Replace the transceiver. When replacing a transceiver, if the SD card contains a valid CIM script, remove the SD
memory card from the nonworking transceiver and insert and seat it in the replacement transceiver. The
replacement transceiver will use the CIM script on the SD memory card and its configuration will be the same as
the original transceiver.
6.3
SD MEMORY CARD PROBLEMS
SD memory card problems are one type of problem that can cause the Fault LED to illuminate.
You can determine the specific problem that causes the Fault LED to illuminate by viewing the results of the POST,
which occurs each time the transceiver boots up.
The POST results will show if there is an SD memory card failure. See
Review the Power On Self-Test (POST) Results
.
The following shows what you will see in the SD memory card portion of the POST results if the SD memory card is
missing:
HOST: SDCARD Present:
FAIL
HOST: SDCARD Fail Pin:
PASS
HOST: SDCARD Write Protect:
OFF
HOST: SDCARD Access:
FAIL
To troubleshoot SD memory card issues:
1.
Check to make sure the SD memory card is present. See
Confirm SD Memory Card (CIM) is Installed and Seated
. If
it is missing or defective, replace it with a new one that has a valid CIM script file.