Technical data

14-32 Chapter 14

Assembly Replacement and Post-Repair Procedures

A17 Motherboard Assembly

Tools Required

• T-10 TORX screwdriver

• T-15 TORX screwdriver

• T-20 TORX screwdriver

• small slot screwdriver

• 2.5-mm hex-key driver

• 5/16-inch open-end torque wrench (set to 10 in-lb)

• ESD (electrostatic discharge) grounding wrist strap

Removal

To remove the A17 motherboard assembly only, perform the following steps to remove all

assemblies and cables that connect to the motherboard.

1. Disconnect the power cord and remove the top, bottom, and side covers (refer to

“Covers” on page 14-6).

2. Remove the front panel assembly (refer to “Front Panel Assembly” on page 14-8).

3. Remove the rear panel assembly (refer to “Rear Panel Assembly” on page 14-14).

4. Remove the preregulator (refer to “A15 Preregulator” on page 14-30).

5. Remove the graphics processor (refer to “A19 Graphics Processor” on page 14-35).

6. Remove the CPU board (refer to “A9 CPU Board” on page 14-26).

7. Remove the memory deck (item 1) by removing three screws (item 2) from the bottom

and four screws (item 4) from the side frames.

8. Remove the source assembly (refer to “A3 Source Assembly” on page 14-20).

9. Remove the samplers and pulse generator (refer to “A4, A5, A6 Samplers and A7 Pulse

Generator” on page 14-22).

10.Remove the card cage boards (refer to “A8, A10, A11, A12, A13, A14 Card Cage Boards”

on page 14-24).

11.Remove the motherboard support bracket (item 3). Continue with step 12 to remove the

motherboard, or step 13 to remove the motherboard/card cage assembly.

12.To disconnect the motherboard (item 7), remove the 34 riv screws (item 8). Important:

Do not misplace any of these screws.