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How to fix Error 134 on OKI C312dn Printer

I write note that had found junk OKI C312dn and success to repair it.

I found OKI C312dn neighborhood junk shop. Notes "An error occured, Cannot print"

There is color laser printer in my house...

"Error 134 Service call" are displaying.

 

How to repair

On the internet, I can found "solder F501".But I can't found F501 on the board.
So I used a tester to find the blown fuse and that it was F6. Then I soldered it.

It useful for C301dn/C312dn/C511dn/C531dn, maybe.

Thank you for the battle.