Are you fancing issues with your Roland D70 because the Low side keys are no longer working? HALG has a solution for you! This board is designed to be replacement of your flex membrane that connects your keypad to the bottom of your keyframe. The board will sit on top of Roland D70 keypad flex PCB and it will make a connection to your bottom board with the flex cable. The kit is composed by a SMCD16 PCB + Flat Cable + Wire glue. A manual with 7 pages instructions is provided and a youtube video to help you install it.  
This board is intended to fix the bad connection between your Roland keypad membrane to the bottom original connector board.
Important disclosure. With this solution of the new PCB and kit, HALG reserves the right to not assume liability or responsibility for your keypad issues, meaning if your keypad has no carbon contact to close connection of the keys by the rubber contact, this board will NOT fix your problem. This kit will solve the problem of keypad membrane contact for LOW side of keypad interconnecting with bottom PCB only. It replaces the older membrane showing on picture.