kc868-A8S v2 not working with SIM7600E

[Dieter]

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.

[admin]

V mainly use for 4G module. we suggest you use KinCony SIM7600E directly. if you want to change hardware, you can check the diagram, do it by yourself.
here is diagram for KC868-A2: https://www.kincony.com/download/KC868-A2-schematic.pdf

[Dieter]

well, 7600E also is mentioned that it needs 5V... Also, if possible I would like to maintain to be able to use a dual sim board and programm a failover logic. So I would like to try to change the resistor and see if that helps. I just need to confirm which resistor it is.

[admin]

Do you have seen KC868-A2 schematic.