If you need to update the revision level of the MPC, you need to change this PROM. Use the
following procedure.
WARNING: Voltages up to 7000V are present in the DIGITEL MPC. Turn off power and
disconnect power cord before performing any service procedures.
1.
Make sure that you have an ESD grounding strap on your wrist.
2.
Turn off power to the MPC and remove its power cord.
3.
Remove the chassis top cover.
4.
Disconnect any cables connected to the CPU board and remove the CPU board from
its slot.
5.
Remove the old PROM.
NOTE: Each PROM contains a label indicating its revision level. Do not use this label to
position the new PROM (the label does not always face the same direction).
Figure IV-5. CPU Board — Location of PROM.
6.
Carefully insert the new PROM, making sure the small groove on the PROM
(denoting pin 1) is positioned correctly. See Figure IV-5.
7.
Reinstall the CPU board and reconnect the cables.
8.
Replace the MPC top cover and plug in the power cable.
Digitel MPC Manual
Page 59 of 72
