Assembly Removal and Replacement, MS202xC 6-11 Replacing Main Keypad Components – 3-61362,
MS20xxC MM PN: 10580-00307 Rev. D 6-13
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, then lift up the bezel carefully, disengage the speaker from its
mounting pins (it stays attached to the underlying Main Keypad PCB), and set the bezel aside.
Removing Main Keypad Rubber Membrane:
7. Protecting the Speaker wires, start at the bottom of the Main Keypad Rubber Membrane and lift it up.
8. Hold the edge of the Speaker with one hand and gently remove the rubber Membrane from each side.
Replacement Options:
9. At this point, your options are to replace the Main Keypad Rubber Membrane, remove and replace the
Main Keypad PCB, or to do both. Each procedure is described in the following sections.
If you are not replacing the Main Keypad PCB, then skip to Step 19. If you are replacing the Main
Keypad PCB, then continue with the next steps.
Removing Main Keypad PCB:
10. At the bottom left corner of the Main Keypad PCB, remove the drop of silicon sealant holding the ZIF
SMT Flip Door connector shut. The narrow ribbon cable in the connector is the Main Menu Keypad Flex
PCB.
11. Lift the connector cover open, and gently lift out the Main Menu Keypad Flex PCB. The Flex PCB stays
in the case, but must be protected and kept out of the way for the following operations.
12. Note that a 16-pin header connector is between the Main Keypad PCB and the Main PCB inside the case.
13. Protecting the speaker and its connections on the PCB, gently pry up the PCB as its header pins
disconnect from the underlying Main PCB Assembly and set the Main Keypad PCB aside.
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 the PCB.
Caution Do not crimp, fold, or puncture the Main Menu Keypad Flex PCB.
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