converter dc dc 12/34 volt

[ut-norm]

Hello everyone I am trying to repair this 12/34 volt dc dc converter powered, by mistake, with an unsuitable generator set.I have restored the 5 volt voltage that powers the R5F21134FP controller that has been replaced and I would like to replace the resonator too 3 pin ceramic indicated with a black arrow in the photo which I fear was damaged by heat during the disassembly of the controller. Unfortunately I can not determine the value. On the tiny container is printed an A followed by an incomprehensible sign.
I attach the datasheet of the controller and the photos of the board.
The NFJ06G diode and the IRF3205 output mosfet are good
The components replaced immediately after the input of the 12 volts are a 10 ohm resistor and the IC 78L05a found burnt.
Can someone help me ?
Thank you all

[sam_sam_sam]

Re: converter dc dc 12/34 volt

“ I would like to replace the resonator too 3 pin ceramic indicated with a black arrow in the photo which I fear was damaged by heat during the disassembly of the controller ”

I can not find what value you can use for this device in the data sheet which find odd that it does not tell you

[stj]

Re: converter dc dc 12/34 volt

clock can be anything upto 20MHz,
the speed will be accounted for in the software.

so that brings me to the main question.
did you buy one pre-programmed from the board maker?
because they usually ship blank and need to be programmed.

[ut-norm]

Re: converter dc dc 12/34 volt

Unfortunately no, it is not programmed and it will be difficult to find it programmed.
Thanks for everything