Rm 908 Keypad Ways | Nokia 105

The keypad is arranged in a standard Row/Column matrix. The "ways" refer to the copper traces running from the keypad contact points to the or microcontroller .

Usually, the inner pad's trace to the next key is broken. 3. Step-by-Step Diagnostic & Repair Procedure Tools Required Multimeter (set to continuity/ohm mode). Soldering Iron (fine tip). Jumper Wire (thin insulated wire). Step 1: Clean the Keypad Area

A common failure pattern on the RM-908 motherboard involves the entire lower section going dead.

The Left Selection pad shares a pathway with the upper numeric layout. nokia 105 rm 908 keypad ways

Specific rows or columns (e.g., 1-4-7-*, 2-5-8-0) do not work.

: If the device fails to turn on despite a good battery, technicians often look for a jumper path for the on/off key Keypad Jumper Guide

Apply flux and solder a thin jumper wire from the component side (resistor/capacitor) to the key point that is not working. The keypad is arranged in a standard Row/Column matrix

Use a multimeter in continuity mode to check which line is broken.

When specific keys or entire rows stop responding, the issue is typically a broken circuit track on the logic board. Repairing this requires a clear understanding of the matrix and knowing how to map micro-jumper wires directly to operational test points or the primary MediaTek processor. Understanding the Nokia 105 Keypad Matrix Architecture

The traveler left with a working phone, understanding that even when a path seems lost, there is always a "way" to jump back into connection. Jumper Wire (thin insulated wire)

: If the keypad is acting erratically, try a hard reset by typing *#7370# on the home screen. Use the default security code 12345 when prompted.

Submerge a cotton swab in 99% Isopropyl Alcohol (IPA). Scrub the gold-plated matrix pads on the PCB and the underside of the metal domes vigorously to remove dust, rust, and carbon buildup.

Tin the tip of your soldering iron and apply a small bead of leaded solder to the exposed trace.