Hi!

I have a S7-300 module after internal 3.3V power failure. One of two buck converters built on ltc1628cg had a lower gate burned out (4DF60L). After replacing seems the processor starts running but SF led is blinking at ~2Hz and any effort to communicate module with pc fails. I use 6es7 972-0cb20-0XA0 usb adapter. Voltages 1.0V, 1.8V are ok. But 5V converter (another side of ltc1628) does not start because a low logic level on enabling pin is held by possibly processor. Please, how to acknowledge this error?

Hello pupkinvasya,

have you this problem only with this pc adapter which article number you had regarded to?

I recommend to update the driver software for the PC Adapter USB in this case. See the link regarding to instruction.

https://support.industry.siemens.com/cs/ww/en/view/109476315

Compile also the complete device configuration and repeat the download.

With best regards
Cicero