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Assembly Replacement Procedures
Motherboard Assembly
Motherboard Assembly
Removal
1. Remove the instrument outer case. Refer to the Instrument Outer
Caseremoval procedure.
2. Remove the rear panel. Refer to the Rear Panelremoval procedure.
3. Remove the top brace and reference bracket. Refer to the Top Brace and
Reference Bracket removal procedure.
4. Remove the reference assembly. Refer to the Reference Assembly removal
procedure.
5. Remove the CPU assembly. Refer to the CPU Assembly removal
procedure.
6. Remove the power supply assembly. Refer to the Power Supply Assembly
removal procedure.
7. Remove the AIF/DIF assembly. Refer to the Analog I.F. (AIF)/Digital I.F.
(DIF) Assembly removal procedure.
8. Remove the Front End Control assembly. Refer to the Front End Control
Assembly removal procedure.
9. Remove the L.O. Synthesizer assembly. Refer to the L.O. Synthesizer
Assembly removal procedure.
10.Remove the Midplane assembly. Refer to the Midplane Assembly removal
procedure.
11.Remove the Front Frame Assembly. Refer to the Front Frame
Assemblyremoval procedure.
12.Remove the RF bracket. Refer to Figure 14-9 on page 449.
13.Remove the fan assembly. Refer to the Fan Assemblyremoval procedure.
14.Refer to Figure 14-69 and Figure 14-70. Remove the midplane bracket (1)
by removing the eight screws (2) (two on each side and four on the
bottom).
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