Installation Note N5222-90128 51
Installation Procedure for the Upgrade
Step 30. Connect New Cables to A20 IF Multiplexer (IF MUX) Board
Connect the IF Multiplexer /SPAM gray cables (N5242-60013 and
N5242-60015), to the A20 IF MUX board as indicated in
(items
➀
and
➁
).
Figure 31
Connect the IF MUX /SPAM gray Low Frequency Extension (LFE) gray cables
to A20 IF MUX (N5242-60013 and N5242-60015)
Step 31. Reinstall A70 Low Frequency Extension (LFE) Board Bracket
1.
Reinstall the A70 LFE board bracket by reversing the steps in
Remove the A75/A70 LFE Board Bracket” on page 24
. Torque the
0515-0372 screws to 9 in-lbs.