Technical data

5-60 FRU Removal and Replacement
5.5.25 ISA Center Wall Removal and Replacement (Model 400s)
To remove the ISA center wall, refer to Figure 5-43 and follow these steps:
1. Remove the top and side covers, RFI cover, all ISA and DIO cards, ISA back
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plane and cardcage, and the converter board.
2. Remove the LED cable clamp from the chassis.
3. Remove the screw at the back right-hand corner of the center wall.
4. Remove the four screws on the right, front edge of the center wall.
5. Remove the three screws on the left, bottom edge of the center wall.
6. Remove the three screws on the left, top edge of the center wall.
7. Remove the center wall towards the right side, routing the power distribution
and ribbon cables clear of the center wall
To replace the ISA center wall, follow these steps:
1. Ensure the main power distribution and main fan cables are wedged under the
chassis’ cable tab above the front main fan.
2. Place the center wall on the chassis ensuring the ISA power distribution cable is
routed through its center wall slot.
NOTICE: Ensure the motherboard tabs fit into their slots on
the center wall.
3. A tab at the chassis’ upper rear corner should fit into a hole on the center wall to
hold the center wall in place while you install the screw. Start one screw in a left,
top, center hole in the chassis to the center wall. Do not tighten the screw.
4. Start another screw in the oval hole in the back of the chassis just below the right
edge of the center wall. Do not tighten the screw.
5. Verify that the power switch and LED board cables are clear of their notch in the
ISA center wall.
6. Install the remaining screws for the center wall.
7. Verify that all cables are not pinched and that the center wall fits correctly.
8. Tighten all of the screws.
9. Replace the LED cable clamp and the other assemblies.