Module Replacement; Module Identification - Comtech EF Data SDM-650B Installation And Operation Manual

SDM-650B Satellite Modem

6.4 Module Replacement

The modem cards are plug-in cards that can be replaced by removing the defective card,
and reinserting the replacement. Card ejectors are available for use in removing the cards.
Note: On the interface card, there are additional screws on the rear panel that need to be
removed before the interface card is removed. These screws must be reinstalled after the
replacement card is inserted.
The power supply in the modem is attached to the modem chassis. For repair of the
power supply module, it is recommended that all plug-in cards be removed, and the
chassis (with the power supply installed) be sent back to the factory for repair.
For instructions on changing data rate cards or software upgrades, refer to Appendix A.

6.5 Module Identification

The modem cards each have an assembly number marked on the board. The latest
revision and serial number are stamped on the board. EFData tracks hardware by
assembly, revision, and serial number.
Data rate dependent hardware is labeled with the associated symbol rate on a label on the
board.
When replacing a plug-in module, care must be taken to ensure that the proper daughter
card is used.
Refer to the individual sections on each module for location of the configuration
identification.
Refer to Table 6-3 for a list of part numbers and descriptions of various modules used in
the modem.
Rev. 6
Maintenance
6–21