Zte mf286d jtag pins

Greetings! Somebody can help with explanation where exactly are the JTAG pins ?

https://openwrt.org/toh/zte/mf286d says there aren't any, are you saying the info's incorrect?

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Oh yeah, I didn't notice that... So if have broken u-boot and no any reaction on serial, it lost ? Is it possible to do something without any very specific tools ?