Chapter 4 195
Assembly Replacement
Mid Web/Fans
Mid Web
To completely remove the mid web from the instrument, perform the
following steps:
Removal
1. Remove the instrument top brace. Refer to the “Top Brace” removal
procedure.
2. Drop the front frame. Refer to the “Drop the Front Frame”
procedure.
3. Remove the A6 power supply. Refer to the “A6 Power Supply”
removal procedure.
4. Remove the A17, A18, and A19 assemblies. Refer to the “A17 RF,
A18 Reference, and A19 Synthesizer Assemblies” removal
procedure.
5. Remove the A10 and the A12 assemblies. Refer to the “A10 Digital
IF and A12 Analog IF Assemblies” removal procedure.
6. Remove the A7 assembly (if installed). Refer to the “A7 Baseband I/Q
Assembly (Option B7C)” removal procedure.
7. Disengage the semi-rigid cable from the mid web by removing the
RF input bracket from the deck and carefully rotating the
cable/bracket assembly up. Refer to the “RF Input Connector”
removal procedure. Using the T-10 driver remove the 2 screws that
secure the bracket to the deck.
8. Undress the coaxial cables from the cable guide in the mid-web.
9. Refer to Figure 4-18. Using the T-10 driver, remove the 9 screws (1)
that secure the mid-web/fan assembly (2) to the deck. Note this
includes 3 screws on the bottom of the instrument. Refer to Figure
4-20 on page 200 and remove the 3 screws (1).
10.Unplug the 3 fan connectors from the motherboard.
11.Lift the mid-web/fan assembly from the deck.
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