7-11 Replacing Main Keypad Components – 3-61362, 3-71027-3 Assembly Removal and Replacement,
7-14 PN: 10580-00307 Rev. D MS20xxC MM
5. Using a small flat blade screwdriver and a piece of rubber as scratch protection, carefully pry the eight (8)
Main Keypad Bezel locking tabs free of the main body of the case. The following tips help with the
removal process:
• The flat blade screwdriver width must be less than 3.5 mm (0.13 inch) wide and as thin as
possible.
• If available, recommended is a screwdriver made of fiberglass or other material that will not
scratch the bezel.
• As each locking tab releases, the bezel comes up a bit.
• The basic technique is to position the protective piece of rubber (or similar material) next to the
slot for scratch protection, press the screwdriver straight in between the case and the bezel, and
then gently lever the screwdriver AWAY from the bezel.
Protecting Speaker and Remove Bezel:
6. When the eight locking tabs are released, lift the bezel carefully up, disengage the speaker from its
mounting pins (it stays attached to the underlying Main Keypad PCB) and set the bezel aside.
7. If you are replacing more than the Main Keypad Bezel, then continue at Step 8. If you are replacing only
the Main Keypad Bezel, then perform the following sub steps:
Replacing Main Keypad Bezel:
a. Replace Main Keypad Bezel by first centering it on the key membrane and the Speaker.
b. Carefully align the speaker mounting pins of the bezel with the holes in the speaker assembly.
c. Work your way around the bezel gradually positioning each Locking Tab into its slot. Take care
not to bend any Locking Tab.
d. When all are correctly inserted, go around again snapping each tab into place.
e. 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.
f. Install the Battery.
g. Install the Battery Door.
Restarting the Instrument:
h. Restart the instrument.
i. Perform a function check for each button on the Main Keypad and the Main Menu Keypad.
Replacement Options
8. At this point, your options are to remove and replace the Main Keypad Rubber Membrane, remove and
replace the Main Keypad PCB, or both of these parts. Each procedure is described in the following
sections.
Caution
The Speaker sits on top of the Main Keypad PCB and is held in place by four locating pins on the
inside of the keypad bezel around the speaker opening. When the keypad bezel is removed, the
speaker is held only by the fragile connecting wires. Use extreme care not to damage the speaker
wires when removing or replacing the keypad rubber Membrane or PCB.
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