Sun Microsystems Enterprise 3500 System Reference Manual page 207

E.4.6.1 Removing the LED Board
1. Remove the panels covering the LED board.
Complete the steps in Section E.4 "Removing the Front and Side Panels."
2. Disconnect the key switch lock and PWB centerplane cables from the LED board
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FIGURE E-9
a. Pull forward on the two locking tabs securing the cables to the LED board.
b. Disconnect the cables.
3. Remove the four screws securing the LED board to the chassis.
There is one screw in each corner of the LED board.
4. Remove the LED board.
E.4.6.2 Replacing the LED Board
1. Orient the LED board so that the three LEDs are visible through the chassis
window cutout.
2. Insert a screw into the front right corner of the LED board.
Use this screw as a guide and place the LED board against the chassis.
3. Slightly tighten the first screw and attach this corner of the LED board to the
chassis.
4. Replace the three other screws that attach the LED board to the chassis.
5. Tighten all four screws.
6. Connect the key switch lock and PWB centerplane cables to the LED board
(
FIGURE E-9
Note – The key switch lock and PWB centerplane cables are keyed so that the cables
fit into the connectors in only one direction and cannot be reversed.
a. Connect the cables.
The key switch lock cable is in front of the key switch PWB centerplane cable.
b. Push back on the locking tabs and secure the cables to the LED board.
The two locking tabs fit over the connector, securing the cable assembly to the
LED board.
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Appendix E Non-Chassis Field Replaceable Units (FRUs) E-17