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097-58001-02 Revision G – April 2008 TimeProvider User’s Guide 163
Chapter 6 Maintaining and Troubleshooting the TimeProvider
Diagnosing the IMC
Interpreting Error Messages
Error messages appear on the console as they occur, and include the time and date
of occurrence. Refer to the event codes described in Table 6-5 and to the alarm
codes described in Table 6-7.
Replacing the IMC or IMC/TPIU
You can remove the IMC or the IMC/TPIU from the shelf and replace it without
affecting outputs.
1. Save the contents of the IMC memory in an IOC by issuing the following
command:
CPY-MEM:::::IMC,IOC,IMC;
This command may take more than two seconds to execute; if it does, then the
In-Process response is issued. See the TimeProvider TL1 Reference Guide for
more information on the CPY-MEM command.
2. Attach a wrist grounding strap and connect it to the TimeProvider chassis.
3. Remove the IMC by loosening the captive screws and pulling the IMC from the
shelf using the U-shaped handles.
Major Red
Off
Major system alarm
No alarm
Minor Yellow
Off
Minor system alarm
No alarm
Alarm Cutoff (ACO) Green
Off
On
Off
Antenna Power
(IMC/TPIU only)
Green
Red
Off
Internal TPIU is communicating with Antenna
Internal TPIU has lost communication with Antenna
GPS is disabled
Antenna Signal
(IMC/TPIU only)
Green
Red
Off
Antenna is communicating with the internal TPIU
Master shelf is powering up
Antenna has lost communication with the internal TPIU
Warning: To avoid possible electrostatic damage to the IMC,
place it in a static-free bag or on a static-free surface.
Table 6-3. LED Conditions for the IMC and IMC/TPIU (Continued)
LED Name Condition Description