Module Replacement; Module Identification; Repacking For Shipment - Comtech EF Data SDM-309B Installation And Operation Manual

Maintenance

6.4 Module Replacement

The modem cards are plug-in cards that can be replaced by removing the defective card
and reinserting the replacement. There are card ejectors for use in removing the cards.
On the interface card there are additional screws on the rear panel that need to be
removed before the interface card is removed (refer to Figure 6-10). These screws must
be reinstalled after the replacement card is inserted to hold the card in place while the
data connector is being installed. The power supply in the modem is attached to the
modem chassis. For repair of the power supply module it is recommended that all the
plug-in cards be removed and send the chassis with the power supply back for repair.
For instructions on changing the data rate cards refer to Appendix A. For instructions on
software upgrades refer to Appendix D.

6.5 Module Identification

The modem cards each have an assembly number that is marked on the board. The latest
revision is stamped on the board as is the serial number. EFData tracks the hardware by
the 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 assure 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 SDM-
309B Modem.

6.6 Repacking For Shipment

The modem and modem cards are to be shipped in the factory packaging. The three main
cards can be shipped in the caddy pack boxes that they were received in. The M&C and
interface cards can also be shipped in the caddy pack boxes when they are being shipped
without the modem chassis.
When a modem is being transported it is required that the three main cards be removed
and sent with the modem packed in the caddy pack boxes. The M&C and interface cards
are to be installed in the modem chassis with the two screws installed on the rear panel to
hold the interface card in place.
Note: Failure to comply with the repacking procedure will void the warranty.
6-6–22
SDM-309B Satellite Modem
MN/U-SDM309B Rev. #