openinverter forum

Posted: **Wed Jul 10, 2024 9:04 pm**

Hi. Repairing Mini v1.1 board. DC buck converter to 5V was fried.
Tested with 5 V afrer it, board and leaf plugin board works, web etc. Drawing 380mA at 5V.
Ordered new RT8259GE DC DC converters. After soldering board works till i rise voltage at 12V input to ~7V. Then RT8259 is damaged. And after it is damaged if i give 5V after it, board works.
Something is not ok with this DCDC converter...
Maybe external rt8259 components are wrong?

Posted: **Wed Jul 10, 2024 9:27 pm**

Ok issue solved. Mini board had burned path at 12V input pins between gnd and +12v. Was not short but heating up, and somehow dcdc converter was impacted.
Cleaned the pcb itself out of burned textolite.
Now i have 160mA at 12V.

Posted: **Wed Jul 10, 2024 9:29 pm**

Now i see IC1 on Leaf doughter board is hot up to 80 degrees.

Posted: **Wed Jul 10, 2024 9:49 pm**

I cant find any documents, bom, pdfs for newest Leaf adapter board. All info is for older one and shop has new version...

Found bom. Shop link sends to wrong bom list of older daughter board.

Posted: **Thu Jul 11, 2024 7:03 am**

Oh, will correct the link later

openinverter forum

[SOLVED]Mini v1.1 and Leaf doughterboard issues

[SOLVED]Mini v1.1 and Leaf doughterboard issues

Re: Mini board DC to DC issue

Re: Mini board DC to DC issue

Re: Mini v1.1 and Leaf doughterboard issues

Re: Mini v1.1 and Leaf doughterboard issues