Asena keypad replacement procedure

 Stop removing the label keypad when the membrane tail is exposed

 Carefully cut through the membrane tail with a Stanley knife.  Keep tension on the label keypad.

 The label keypad is totally removed.  The cut end of the membrane tail is still exposed.

 Use Methylated Spirits.

 Dab it onto the adhesive with a tissue.  Ensure that the Methylated spirits cover all the adhesive so as to soften it

 As the adhesive softens start using your finger to remove the adhesive.  Ensure that the surface is totally clean and ready for the new label keypad.

 Remove all backing paper, especially under the membrane tail.

 Feed in the new membrane tail over the old one, (Using the old one as a guide.)  You may find that the old membrane tail moves into the case, this is ok.

 Continue feeding the new membrane tail all the way in and position the label keypad evenly.  Ensure that you haven’t creased the membrane tail.

 Remove the 6 case screws.  Carefully separate the front and rear case halves and disconnect the power supply to control board cable, the speaker cable and the RS.232 cable.  Remove the three control board screws  Remove the old membrane tail from connector PL.6.Lift the main control pcb up you should see the new membrane strip.

 Pulling the old membrane tail should remove it and it’s adhesive pad.  Fit new membrane with adhesive strip and reinsert back into PL6.

 Completely remove the old membrane tail with adhesive pad.

 Cut a length of double-sided tape, approx. 20mm x 12mm.  The double-sided tape MUST be secured to the edge of the black metal bezel so as to prevent the possibility of a short circuit between the bezel and the membrane panel flexible circuit.