AT&T PC 6300 - Replacing HDU Controller

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MAINTENANCE
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Replacing HDU Controller
1. Turn the System Module and all external devices OFF.
2. Unplug the ac power cable from the rear panel.
3. Loosen the two screws that secure the upper cover.
4. Slide the upper cover forward approximately 0.5 inch and
lift it from the System Module.
5. Disconnect the ribbon cables from the HDU Controller.
Note: Notice how the ribbon cables are connected
to the controller with the blue stripe of the cable at
the bottom.
6. Remove the screw that secures the HDU Controller Board"
■■■ D. neiauve tne screw tnai secures tne
1 retaining bracket to the rear panel
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7. Carefully remove the HDU Controller. Board from the Bus
Converter.
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