52 Installation Note N5222-90114
Installation Procedure for the Upgrade
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2.
Route the reconnected mixer brick (MXB) and IF multiplexer (IF MUX) gray
cables that were reconnected in
“Step 32. Install the New Mixer Brick
(MXB) Cables and Route Cables” on page 49
. Refer to
Figure 30
Routing the reconnected MXB and IF MUX Gray Cables on the IF MUX board
Step 34. Install the New A70 Low Frequency Extension (LFE) Board
1.
Reinstall the A70 LFE board (N5291-60001) by reversing the steps in
8. Remove the A75 Low Frequency Extension (LFE) Board” on page 21
Torque the 0515-0665 screws to 9 in-lbs.