ADCP-61-471 • Issue 4 • June 2000 • Section 2: Operation and Maintenance

DLP-503

Page 1 of 1

APU INSTALLATION AND TESTING

Summary: This procedure provides guidelines for installing and testing the APU.

Caution: Modules can be damaged by electrostatic discharge (ESD). Before handling any modules, ESD protection must always be used. An ESD grounding post is located on the chassis for connecting the ESD wrist band. Ensure that all modules removed from the equipment or not installed, are properly stored in anti- static packing material. When working with modules, always place the module on an electrically-grounded, approved, anti-static mat.

1.Remove the APU from protective packaging.

2.Push the APU into slot marked APU located in the upper right corner of the chassis.

3.Use screw to secure the APU to chassis.

4.If PWR indicator is not lighted at all, check for power at the A and B connections on the backplane.

Reference: DLP-508–48 VDC Power Supply Test

5.If there is power at both of the connections (A and B), remove and replace the APU with a new one.

6.Press the LMPTST switch to verify that all APU indicators light. If any indicator does not light, replace the APU.

Stop! You have completed this procedure.

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© 2000, ADC Telecommunications, Inc.