14-30 Chapter 14
Assembly Replacement and Post-Repair Procedures
A17 Motherboard Assembly
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 14-28).
5. Remove the graphics processor (refer to “A19 Graphics Processor” on page 14-34).
6. Remove the test set deck (item 3) by removing the three screws (item 4) from the bottom
and four screws (item 5) from the side frames. For clarity, the figure on the next page
does not show the assemblies attached to the test set deck.
7. Remove the CPU board (refer to “A9 CPU Board” on page 14-24).
8. Refer to Figure 14-14. Remove the memory deck (item 1) by removing three screws
(item 2) from the bottom and four screws (item 6) from the side frames.
9. Remove the source assembly (refer to “A3 Source Assembly” on page 14-18).
10.Remove the samplers and pulse generator (refer to “A4, A5, A6 Samplers and A7 Pulse
Generator” on page 14-20).
11.Remove the card cage boards (refer to “A8, A10, A11, A12, A13, A14 Card Cage Boards”
on page 14-22). Continue with step 12 to remove the motherboard only, or to 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.
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