Nokia 105 Rm 908 Keypad Ways «Confirmed — Roundup»

Nokia 105 (RM-908) keypad ways

Here’s an informative guide regarding the — a term commonly used in mobile hardware repairing to refer to the track paths (circuit traces) and testing points for the keypad buttons on the phone’s PCB (printed circuit board).

Before jumping wires, dismantle the phone: nokia 105 rm 908 keypad ways

6. Diagnosing keypad faults

  1. Identify the dead key’s Row and Column from the matrix table.
  2. Using a fiberglass pencil, expose the copper contact points on the keypad PCB (the carbon pads themselves – but be careful, carbon doesn’t solder well).
  3. Instead, find the test points or via holes that connect to those Row/Column lines.
  4. Solder a jumper between the Row trace and the Column trace of the faulty button? No – this will cause that key to remain pressed. Instead, jumper the broken line to a working point on the same Row or Column from another button.
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