Nokia 105 Rm 908 Usb Pinout Access
The connection points are located on the main motherboard. You must identify the test points to solder or press probes against the board.
Standard Interface:
Pinout Diagram Details:
| Pin Name | Function | Description | | :--- | :--- | :--- | | V+ (VBUS) | USB Power | +5V Input (Red Wire) | | D- | Data Minus | Data Negative (White Wire) | | D+ | Data Plus | Data Positive (Green Wire) | | GND | Ground | Ground/Earthing (Black Wire) | | GND | Ground | Secondary Ground point | Nokia 105 Rm 908 Usb Pinout
(Note: On the RM-908 PCB, these are usually gold-colored contact pads labeled accordingly or arranged in a vertical row. Locate the GND point first to orient the others.)
On the RM-908 board, the test points are often arranged vertically near the bottom edge:
To understand the RM-908, we must start with the standard micro-USB specification. A typical micro-USB connector has 5 pins: The connection points are located on the main motherboard
| Pin | Name | Function | |-----|------|-----------| | 1 | VBUS | +5V (Charging power) | | 2 | D- | Data line negative (USB 2.0) | | 3 | D+ | Data line positive (USB 2.0) | | 4 | ID | Identification / On-The-Go (OTG) | | 5 | GND | Ground (0V) |
In most phones, pin 4 (ID) is used to detect if a USB OTG cable is attached. In the Nokia 105 RM-908, pin 4 serves a different purpose: charging detection and accessory identification.
The Nokia 105 (RM-908) uses a standard 5-pin Micro-USB connector. Below is the hardware-level mapping. Pinout Diagram Details: | Pin Name | Function
| Pin | Signal Name | Function | Connected to (on PCB) | Typical Voltage | |-----|-------------|----------|----------------------|------------------| | 1 | VBUS | +5V Charging Input | Charging IC / PMIC | 5.0V (max 6.0V) | | 2 | D- | USB Data Minus | RAP3 CPU (via series resistors) | 0–3.3V logic | | 3 | D+ | USB Data Plus | RAP3 CPU (via series resistors) | 0–3.3V logic | | 4 | ID | USB ID | Pulled to GND via 0Ω resistor (for OTG detect – not used) | GND | | 5 | GND | Ground | Main ground plane | 0V |
Shell: Shield Ground (connected to GND via ferrite bead).
The Nokia 105 (model designation RM-908) is legendary in the world of feature phones. Launched in 2013, it boasts exceptional battery life, a rugged build, and surprising durability. However, like any electronic device, its micro-USB port is vulnerable to physical stress, corrosion, or simply wearing out after years of use.
When the charging port breaks, your options are limited. You can replace the port, but replacement parts are scarce. The most reliable solution for technicians and repair enthusiasts is understanding the Nokia 105 RM-908 USB pinout to either:
This article will dissect the pinout, provide soldering schematics, and offer advanced repair techniques.