6-11 Replacing Main Keypad Components – 3-61362, 3-71027-3 Assembly Removal and Replacement,
6-14 PN: 10580-00307 Rev. D MS20xxC MM
Replacing Main Keypad PCB:
14. The replacement PCB should come with an installed 16-pin header connector. The longer pins on the
header go into the Main Keypad PCB. The short pins will ultimately connect through the front cover
mounting slot into the Main PCB Assembly. Inspect the header pins to make sure that they are straight
and evenly spaced.
If the 16-pin header connector is not included with the replacement PCB, then remove the existing
16-pin header from the old PCB and install it into the replacement unit. As stated, the long pins go into
the Main Keypad PCB, and the short pins go through the case slot into the Main PCB (connector J5006).
15. Carefully position the replacement Main Keypad PCB on the case with the 16-pin header going into the
case slot.
16. When the position is verified, and you are sure that the header is correctly located, gently press the PCB
into place, making full contact with the Main PCB Assembly.
17. Open the connector Flip Latch in the lower left corner of the PCB at connector J2 and insert the Main
Menu Keypad Flex PCB into the connector. Push the connector Flip Latch down and add a drop of RTV
(Room Temperature Vulcanizing silicon sealant) to hold the door shut. Allow ample time for the sealant
to set.
Anritsu Part Number: 3-783-1102 RTV Silicon Sealant
18. Either replace or reinstall the Main Keypad Rubber Membrane by following Step 19 through Step 23.
Replacing Main Keypad Rubber Membrane:
19. Starting at the bottom, lay in the replacement rubber Membrane.
20. At the top, lift up the left edge of the Speaker and lay in the rubber Membrane.
21. Again at the top, lift up the right edge of the Speaker and lay in the rubber Membrane.
22. When complete, the Speaker should sit on top of the rubber Membrane (the corners of the rubber
Membrane are between the speaker and the Main Keypad PCB).
23. Make sure that the Main Menu Keypad ribbon cable is still securely connected at connector J2.
Installing Main Keypad Bezel:
24. Replace Main Keypad Bezel by first centering it on the rubber membrane and the Speaker. Note that
4 pins on the bezel engage with the 4 holes in the speaker frame.
25. Work your way around the bezel gradually positioning each Locking Tab partially into its slot. Take care
not to bend any Locking Tab.
26. When all are correctly inserted, go around again snapping each tab into place.
27. When complete, each button should protrude approximately 1.5 mm to 2 mm above the bezel.
Installing Battery:
Refer to Section 5-4 “Battery Pack Removal and Replacement” on page 5-3.
28. Install the Battery.
29. Install the Battery Door.
Restarting the Instrument:
30. Restart the instrument.
31. Perform a function check for each button on the Main Keypad and the Main Menu Keypad.
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