pca10028 does not work

[Oguzhann]

Hello,

I have a problem with PCA10028 DK Board. When i connect the board over usb to pc, the board is defined by pc. But i can not flashing. When i measure the voltage circuit, There is an problem. Can you help me?

[Einar Thorsrud]

Hi,

When i measure the voltage circuit, There is an problem.

What is the problem when you measrue? Can you elaborate?

Do you know what has happened with the DK in the past? (Perhaps it has been modified etc).

PS: The nRF51 is quite old, so I would recomend you consider nRF52 or nRF53 for a new project.

[Oguzhann]

i have two boards, i should repair the boards.

when I compare it with the working circuit, I see some differences. it looks like 2.1 volts on the tp11 point, but 2.7 on my working circuit. also, the section where d1 is heating up. i measured d1 and changed it, the problem continues the same.

[ketiljo]

Here's the schematic for the board, v. 1.2.3: pca10028_schematic_and_pcb.pdf

[Oguzhann]

thank you.