Replacing The Ioc - Symmetricom TimeProvider 1000 User Manual

Chapter 6 Maintaining and Troubleshooting the TimeProvider
Diagnosing the IOC
2. Issue the following TL1 command to take the Standby IOC out of service:
ED-EQPT::IOCm:::IOCSTATE=OOSRV;
where m is 1 or 2, and corresponds to the location of the Standby IOC (1 is the
left slot and 2 is the right slot).
Caution: Output signals are turned off when you place the
second IOC out of service.
3. Attach a wrist grounding strap and connect it to the TimeProvider chassis.
4. Loosen the captive retaining screws and pull out on them to unseat the IOC from
the shelf.
Warning: To avoid possible electrostatic damage to the IOC,
place it in a static-free bag or on a static-free surface.
5. Place the IOC in a static-free bag or on a static-free surface.
6. Repeat Steps 2, 3, and 4 for the Active IOC.
7. Install new IOCs using the appropriate procedure in
150.

Replacing the IOC

This section contains procedures for replacing IOC in three circumstances;
Replacing the only IOC in a shelf
Replacing one of two IOCs in a shelf
Replacing both IOCs in a shelf
Replacing the Only IOC
To replace the only IOC in a shelf, use the following procedure. Output signals will
resume once the IOC has achieved lock on an input signal. This procedure
assumes that you have stored the contents of the IOC memory in the IMC using the
CPY-MEM command.
1. Attach a wrist grounding strap and connect it to the TimeProvider chassis.
2. Install the IOC into the shelf and tighten the captive retaining screws.
3. Copy the contents of the IOC memory stored in the IMC by issuing the following
command.
150 TimeProvider User's Guide
Replacing the IOC, on page
097-58001-02 Revision C – August 2005