Lg K41s Isp Pinout Better 'link'

| Signal | Test Point ID | Color Code in Diagram | Voltage | Notes | | :--- | :--- | :--- | :--- | :--- | | | TP502 | Red | 3.3V | Do not power the phone. Supply 3.0V from your programmer here. | | CLK | TP507 | White | 1.8V | Very sensitive. Keep the wire under 5cm. | | CMD | TP509 | Green | 1.8V | Pull-up resistor to 1.8V is usually internal. | | DAT0 | TP511 | Blue | 1.8V | Primary data line. | | GND | Any large copper area | Black | 0V | Use the shield ground or the battery negative terminal. |

| Symptom | Likely Cause | Better Fix | |--------|--------------|-------------| | No eMMC ID | CLK line too long (>15cm) | Shorten to 8cm max, use shielded wire. | | CRC errors | Signal reflection | Add 22R on CLK, 10R on CMD. | | Phone powers on during ISP | Back-powering via DAT0 | Insert diode (1N4148) on DAT0 line from programmer. | | Intermittent detection | Weak ground | Add second ground wire to the USB port shield. | lg k41s isp pinout better