digico SD7 Technical Notes - Page 7

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digico SD7 Technical Notes
TN198 Page 7 of 11
Next then feed the Optocore end down and out the rear to the removed Engine Card.
Note that the Red trace (pin1) goes to the right looking from the connector end of the optical card.
Slide the Engine tray partially back into the Engine Drawer. Continue to slide the Engine PCB in until
the Power connector can be re fitted.
Before fitting the Optical connectors, replace the RJ45 cable and socket asembly. This is to allow for
the future system enhancements.
Remove the RJ45 Socket and cable from the rear of the Engine (secured by 2 screws) and replace
using the new assembly supplied with the kit. The new version is the same save that it has a longer
cable.
Next install the Optical Connectors
Remove the blanking plates that cover the HMA optical connector mounting holes taking note of the
connector
order.
If you are only installing Loop 1, only remove the blanking plate for the 2 Optocore Connectors. If
you are installing the optional 2 loop system, remove blanking plates for all 4 connectors.
To fit each HMA Connector to the rear of the Engine. Remove the large Nut / Dust Cap Retainer
from the HMA Connector and insert from the rear. Then place the Nut on the outside and tighten to
secure. Repeat for the other connector(s) you are installing.
Note these nuts are made of soft aluminium and are easily damaged during fitting. Tighten with
fingers to start, then finally tighten with either a slim fit 34mm socket or use a large adjustable
spanner (wrench) with soft protection, such as card, on the jaws.
TN198.doc\