220 Chapter4
Assembly Replacement
Procedure 7. A7 through A13 Assemblies
Procedure 7.A7 through A13 Assemblies
A separate replacement procedure is supplied for each assembly listed
below: *
• A7 LO Multiplier/Amplifier (LOMA)
• A8 Low Band Mixer
• A9 Input Attenuator
• A10/A12 RYTHM/SBTX
• A11 YTO
• A13 Second Converter
Before beginning a procedure, do the following:
1.Fold out the A14 and A15 assemblies as described in“Procedure 8.
A14 and A15 Assemblies.”
2. If the A9 input attenuator, A11 YTO, or A10/A12 RYTHM/SBTX
assembly is being removed, also fold down the A2, A3, A4, and A5
assemblies as described in “Procedure 5. A2, A3, A4, and A5
Assemblies.”
Use Figure 4-20 on page 221 to locate the assemblies and cables called
out in this procedure.
NOTE Use a torque wrench to tighten all SMA connectors to 113 Ncm
(10 in-lb). part number 8710-1655 can be used for this purpose. The
style of torque wrench may vary, but in all cases do not tighten the
connectors beyond the point at which the torque wrench "clicks" or
"breaks-away."
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