Maintaining and Troubleshooting
Overview
Introduction
This section explains how to maintain and replace Vanguard 300/305
components, including daughtercards.
Only trained, qualified technicians should perform the procedures outlined in this
chapter.
Motorola Vanguard 300/305 daughtercards and DIMs are sensitive to static
discharge, which can damage components. Use proper handling and grounding
precautions when handling a Motorola Vanguard 300/305 daughtercard or DIM.
Opening the Enclosure
Introduction
This section explains how to open the Vanguard 300/305 enclosure.
Before You Begin
Power down and disconnect the Vanguard 300/305 before you remove the top
cover, front panel, and handle any components.
Procedure to Remove the Top Cover and Front Panel
Follow these steps to open the enclosure.
Step
Action
1
Open the front panel door by separating the mounting tabs from the base
of the unit and using a downward motion to pull it toward you and off as
shown in Figure 4-1.
2
Release the plastic locking clips at the bottom of the Vanguard unit, as
shown in Figure 4-2.
3
Insert a 0.25-inch flathead screwdriver at a 45-degree angle between the
unit and along the topmost portion of each of the six snap hinges, (three
located on each side of the unit) and push downward, as shown in Figure
4-3.
4
The hinges snap out toward you. Lift off the top cover, as shown in
Figure 4-4.
