SHP-DS510
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      SHP-DS510 - How to change the master PIN code

      1. Unlock and open the door
      2. Take the battery cover off
      3. Press the [REG] button once to start the registration mode
      4. Enter the current master pin code (factory master PIN code is 1234) + *
      5. Press 1 + *
      6. Enter the new master pin code (4-10 digits) + *