10-26-2026, 12:05 AM
Hi,
I have a similar problem with a KC868-A2 v2.6 & A7670E SIM board: I measure 3.97 V on pin V of the SIM header. My A7670E SIM boards need 5-10 V. In this thread it was suggested replacing the 2.26K feedback resistor with 3K to get 5 V. On the KC868-A2 v2.6, which resistor is it (designator and position), and is 3K correct for 5 V? Is the 4V rail used by anything else on the board? Thank you.
I have a similar problem with a KC868-A2 v2.6 & A7670E SIM board: I measure 3.97 V on pin V of the SIM header. My A7670E SIM boards need 5-10 V. In this thread it was suggested replacing the 2.26K feedback resistor with 3K to get 5 V. On the KC868-A2 v2.6, which resistor is it (designator and position), and is 3K correct for 5 V? Is the 4V rail used by anything else on the board? Thank you.