104 Reciter Board Replacement TB8100 Service Manual© Tait Electronics Limited September 20065.1 Replacing the System Interface BoardImportant You must reprogram and recalibrate the reciter after replac-ing the system interface board. Refer to “Reprogrammingand Recalibration” on page 105.Refer to “Reciter Disassembly and Reassembly” on page 99 for details onremoving and refitting the covers and front and rear panels. The circlednumbers in the following instructions refer to Figure 5.1 on page 106.Compatibility When fitting a replacement system interface board, you must make sure thenew board is compatible with the firmware version loaded into the reciter,as described in the following table.Removal 1. Remove the digital side cover and rear panel.2. Disconnect the flexible connector to the digital board b from thesocket on the system interface board.3. Remove the M3 Torx screws securing the board to the heatsink.4. Carefully lift the board upwards off the locating pins c and removeit from the heatsink.Refitting 1. To refit the board, follow the removal instructions in reverse order.Important Make sure the insulator sheet is correctly positioned and flaton the heatsink. Although this sheet is an electrical insula-tor, it is also thermally conductive and must allow the boardto sit as flat as possible to provide effective heatsinking.Operating the reciter without the insulator sheet inplace will result in permanent damage to the digitalor system interface boards.Important Make sure the flexible connector is correctly positioned andlatched in its socket, as shown in Figure 5.2 on page 107.System Interface BoardCompatible ReciterFirmware Versionsstandard, isolated, isolated E&M, and TaitNet:version 1 and later 02.02 or laterTaitNet RS-232 02.02 or laterTaitNet Ethernet 03.00 or later
