User's Manual

Table Of Contents

EX7100 Technical Manual - Module Descriptions

7.11.3 Alignment

The Modem/Controller module requires no alignment and has no user adjustments.

7.11.4 Modem/Controller Module Replacement Procedure

1. Isolate the EX7100 Terminal from the incoming DC supply by removing the DC input

wires from the rear panel terminal block.

2. Remove the top cover as described in Section 6.1.

3. Note the connector positions and the way that the cables are run (it is important that

all cables are replaced as they were initially run before the module replacement

procedure).

4. Remove connections PL1, PL2, PL3, PL4, PL8, PL9 and PL502 from the

Modem/Controller module

5. Remove the six M3 screws and washers that retain the module. Keep the screws in a

safe place.

6. Carefully position the new Modem/Controller PCB into the casting taking care not to

flex the PCB as this can cause damage to the surface mounted components.

Replace the six M3 PCB mounting screws. Carefully tighten the screws.

7. Re-connect all cables as removed in 4. above. Ensure that all

cables are run as they

were prior to removal.

8. Inspect the EX7100 terminal to ensure that it is free of foreign material. Remove and

clean as required.

9. Connect the antenna to the terminal. Apply power to the EX7100 rear panel and

switch the terminal on. Check that at turn-on the two PCB mounted red LED's stay on

for approximately one second and then extinguish. D501 should be on continuously

and D104 should be off. As the link starts up, green LED's D100, D101 and D102

should come on sequentially (note that a full link must be established to meet this

requirement). If red LED D103 continue to flash, the Modem/Controller module is

probably faulty.

10. Replace the top cover, taking care to tighten every screw. No screws should be left

over at the end of the job.

11. Re-install the EX7100 back into its rack and re-connect all necessary power,

signalling and antenna cabling.