Nokia 105 Rm 908 Keypad Ways «DELUXE»
You're looking for a helpful paper or guide on the Nokia 105 (RM-908) keypad ways. Here are a few resources that might assist you:
- Tin the exposed copper pads and the jumper wire tip.
- Apply a tiny amount of flux.
- Solder one end of the wire to the connector pin’s leg (or nearest healthy via).
- Route the wire carefully, avoiding CPU pins, RF shields, and mechanical parts (keypad dome sheet).
- Solder the other end to the CPU’s corresponding Keypad Row/Column pin or test point.
- Voltage on any row line (with no key pressed) = ~2.8V.
- If 0V, CPU not driving columns or VIO missing.
- Scope column lines for scanning pulses (100–200Hz).
- Phillips #00 Screwdriver
- Plastic spudger
- Multimeter (with continuity test)
- Fine soldering iron (25W-30W with a sharp tip)
- Enameled copper wire (0.1mm or 0.2mm)
- Isopropyl alcohol & brush