Assembly Removal and Replacement, MS202xC 6-13 Replacing Main Menu Keypad Components
MS20xxC MM PN: 10580-00307 Rev. D 6-17
6-13 Replacing Main Menu Keypad Components
3-61361, 3-71030-3, 3-61378-1
This procedure provides instructions for removing and replacing the Main Menu Keypad Plastic Bezel, the
Main Menu Keypad Rubber Membrane, and the underlying Main Menu Keypad Flex PCB. The procedure
steps are written with the assumption that the Main Keypad PCB will not be replaced. All keypad parts can be
replaced without opening the MS202xC case. If only the Main Menu Keypad Rubber Membrane is to be
replaced, then use the prior procedure in Section 6-12 “Replacing Main Menu Keypad Rubber Membrane –
3-61361” on page 6-15.
Part Numbers
• 3-61361 – Main Menu Keypad Rubber Membrane for MS2026C, MS2027C or MS2028C instruments
• 3-71030-3 – Main Menu Keypad Flex PCB for either MS2026C, MS2027C or MS2028C instruments
• 3-61378-1 – Main Menu Keypad Plastic Bezel for either MS2026C, MS2027C or MS2028C instruments
Procedure
1. Place the instrument face up on a protected work surface oriented with the top Connector Panel away
from you.
2. Remove the Battery Door and the Battery. Refer to Chapter 5, “Battery Information and Replacement”.
Removing Rotary Knob:
3. Remove the Rotary Knob by using a medium flat blade screwdriver and a small piece of gasket or rubber
as anti scratch material.
4. Slide the screwdriver under the Knob, and gently lever it the Knob up and off of its shaft.
Removing Main Keypad Bezel:
5. The Main Keypad Bezel and rubber Membrane must be removed to gain access to connector J2 on the
Main Keypad PCB.
The Main Keypad PCB does not need to be removed to service the Main Menu Keypad assembly.
6. Eight (8) locking tabs hold the Main Keypad Bezel to the case as shown in Figure 6-10.
Note
Use a small piece of rubber or similar material to prevent scratches to the front panel and the switch
bezel.
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