MOP for Replacing an XM Unit
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Transcript of MOP for Replacing an XM Unit
METHOD OF PROCEDURE
Replacing a faulty XM UNIT
Procedure
2.1 Prerequisites
The following conditions must apply before this procedure can be completed:
See the alarm printout distributed group switch fault The fault-suspected XM designation, defined as plane, individual
row, and individual column, must be known An engineer must be available on site.
2.1.1 Special Aids
Grounding wrist strap (LYB 250 01 or equivalent) Screwdriver (Torx, size T8)
2.2 Actions
2.2.1 Print Unit status
Use command GDSTP .
2.2.2 Block Selected XM Unit
Use command GDBLI.
2.2.3 Block RP
Block the Regional Processor (RP) that belongs to the selected XM unit.
Use command BLRPI .
Note: See printout DISTRIBUTED GROUP SWITCH UNIT TEST
RESULT received in Step 2.2.1
2.2.4 Print Device Position Data
Use command EXPOP .
2.2.5 Replace Board
Danger
Removing or inserting a board without wearing a grounding wrist strap can damage the equipment.
Caution
Removing a board that does not have the MIA LED lit may cause service interruption.
Disconnect all cables connected to the board selected according to the printout RESULT received in Step 2.2.1 Replace the board and reconnect all previously disconnected cables. Note:
This step must be performed on site.
2.2.6 Deblock RP
Deblock the RP that belongs to the replaced XM unit.
Use command BLRPE.
2.2.7 Test the Replaced XM Unit
Use command GDTEI .
If the XM unit is faulty still, consult the next level of maintenance support.
Deblock the replaced XM unit.
Use command GDBLE .
2.3 Job completed