178 Chapter 6
Replacement Procedure
A50 Analog Motherboard Replacement
A50 Analog Motherboard Replacement
Tools Required
• TORX screwdriver, T10, T15, and T20
• Flat edge screwdriver
• Open-end wrench, 9/16 inch (set to 3.39 N-m / 30.0 lb-in)
• Open-end torque wrench, 5/16 inch (set to 1.02 N-m / 9.0 lb-in) (for reconnecting SMA
connector)
Removal Procedure
Refer to Figure 6-22 for this procedure.
Step 1. Remove the outer cover as described in “Outer Cover Removal” on page 136.
Step 2. Remove the front panel as described in “Front Panel Removal” on page 138.
Step 3. Remove the freq/power detector module as described in “A1 Freq / Power Detector
Module Replacement” on page 168.
Step 4. Remove the ADC/DSP board as described in “A3 ADC/DSP Board Replacement” on
page 172.
Step 5. Remove the local synthesize module as described in “A4/A5 Local Synthesize Module
Replacement” on page 174.
Step 6. Remove the phase detector board as described in “A6 Phase Detector Board Replacement”
on page 176.
Step 7. Remove the power supply as described in “Power Supply Assembly Replacement” on
page 146
Step 8. Remove the three 9/16 inch nuts (item 1) fastening the rear panel.
Step 9. Remove the four TORX T10 screws (item 2) from the chassis and remove the plate (item
3).
Step 10. Remove the ten TORX T10 screws (item 4) fastening the analog motherboard.
Step 11. Slide out the analog motherboard (item 5).
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