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Wire List #48 – 19 Easy Steps to Replacing Your SR Keypad

Social Media WireLists48 350pxWhile most repairs should be done by us at the factory, there are some that you can do yourself. If the buttons on your SR receiver seem “soft” (they no longer “click” when pressed) or are slow to respond, or the keypad looks the worse for wear, you can easily replace it. 



Before you begin, assemble the following tools:

  • SR Keypad. For SR, SRa and SRb, the Lectrosonics Part Number is 48093. For the SRc, it is 48626.
  • Static grounding strap*
  • Small flathead and Phillips head screwdrivers
  • Small needle nose pliers or electronics tweezers
  • GooGone or similar adhesive remover
  • Lint-free wipe or paper towel
  • Soldering iron and solder wick
  • (Optional) Black Sharpie


* Static electricity can damage circuit boards, so the strap is essential. Wearing a grounding strap dissipates the charge to a ground instead of to the item that you’re working on. Digi-Key, for example, offers Static Control Field Kits that contain a safety mat along with the strap.


Tip: We provide Part Numbers for screws and various components named in this list. It’s always a good idea to have extras on hand in the event that one is lost or damaged. Call our Service Department and request a Small Parts Order.


Important: Always maintain proper personal safety and ESD (electrostatic discharge) prevention procedures when doing work of this type.

  1. Remove the two #2x1/8” Phillips flathead screws (Lectrosonics Part Number 28869) that hold the bottom adapter plate.
    Step1
  2. Remove the two #2x1/8” Philips flathead screws (Lectrosonics Part Number 28869), one on each side just below the top panel.
  3. Remove the bottom adapter, then the cover
    Step3a Step3b

  4. 
Remove the two #2x1/8” Phillips pan head screws (Lectrosonics Part Number 28541) holding the RF board.
    Step4
  5. 
Unsolder each antenna wire from the forked terminals on the RF board. Be careful not to disturb the tiny components on the PCB.
    Step5
  6. Carefully separate the RF board from the audio board, being careful not to damage the two 12- pin board interface connectors. Remove excess solder from forked terminal with solder wick.
    Step6
  7. Push forward on retaining ears of the ZIF (Zero Insertion Force) connector for the keypad cable.
    Step7a

    Step7b
  8. Remove keypad ribbon cable from ZIF connector.
    Step8a

    Step8b

  9. Push forward on retaining ears of the ZIF (Zero Insertion Force) connector for the display cable.
    Step9
  10. Remove display ribbon cable from ZIF connector.

    Step10
  11. Remove the two #2x1/8” Phillips pan head screws (Lectrosonics Part Number 28541) holding the audio board assembly to the front panel assembly.
    Step11a

    Step11b
  12. Remove the screws holding the Case Mounting Plate to the Control Panel.

    Step12
  13. Disassemble the Front Panel Assembly.

    Step13
  14. 




Remove the old keypad
    Step14
  15. Using a small amount Goo Gone or similar product, clean adhesive from the Control Panel Keypad mating surface with your lint-free cloth. Apply the Goo Gone to the cloth and not to your unit.
    Step15a

    Step15b
  16. Remove adhesive backing on new keypad.

    Step16
  17. 

Insert keypad ribbon cable through slot in Control Panel.


    Step17
  18. Fasten the keypad to the control panel.
    

NOTE: All keypads have a fixed-diameter opening for the antenna, as can be seen below. If your SR receiver has the “fixed “style of antennas, a small amount of aluminum will be seen around the antenna base. If you find this visual appearance unsightly, we suggest using a black Sharpie to darken the bright aluminum in the open area before you adhere the keypad.
    Step18
  19. Reverse Steps 1-13 to reassemble your unit.





Have you ever replaced your own keypads? Do you have an alternative way of doing this or suggestions for others? Share them on our Facebook page. Stuck while trying this yourself? This email address is being protected from spambots. You need JavaScript enabled to view it. or This email address is being protected from spambots. You need JavaScript enabled to view it..