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1. Move the payload structure out of the way, so you have access to the payload bay.
2. Locate the sonar controller.
The controller is at the front of the payload bay, screwed into the payload bay deck with
two screws, and is plugged into the Sonar 1 connector on the core. This connector is not
accessible from the payload bay, but does not need to be unplugged for this procedure.
3. Unscrew the controller from the payload bay deck by removing two screws.
Retain the screws for mounting the replacement controller.
4. Unplug the larger cable from the sonar controller.
Be careful not to let the cable end slip into the chassis.
5. Unplug the four sonar unit cables from the controller.
These are the smaller cables that go to the individual sonar units. Make sure these are
labeled and tied up, so they can't slip into the chassis.
6. Connect the four sonar unit cables to the new controller.
Ensure that the cable labels match the controller labels.
7. Plug the larger cable into the new controller.
8. Screw the new controller to the payload bay deck, using the two screws removed from
the old controller.
9. Reinstall the payload structure.
10. Dispose of the old controller according to local and national regulations concerning elec-
tronic components.
Light Discs
The two light discs and their controllers are single units, so replacing a controller also replaces
all of the lights on that side of the platform.
1. Remove the side skin from the side that needs the light disc replaced.
Refer to Removing and Installing Skins on page 123.
2. Unscrew the four screws holding the light disc PCA to the side skins.
Retain the screws and round cover for installing the new assembly.
3. Remove the light disc PCA.
4. Screw the new assembly and round cover to the side skin, using the screws from the
old assembly. The PCA is keyed so that it can only be installed in one orientation.
5. Reinstall the side skin, connecting the cable to the new light disc PCA.
6. Dispose of the old light disc PCA according to local and national regulations con-
cerning electronic components.
Operator Panel
The Operator panel will typically be located on a user-supplied payload structure, so the
removal and replacement of this will vary from one AIV to another. It plugs into the HMI
11970-000 Rev H1
LD Platform OEM User's Guide
Chapter 8: Maintenance
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