mcuid AAAA - phone don't power on or don't signal TX high after power on ( Possible UPP damage, phone tx not making contact)
mcuid CCCC - phone don't signal TX high after UEM reset request (bsi line not connected properly, check for 3.3k resistor on bsi line, or UEM dmaged)
mcuid DDDD - phone don't signal TX low after UEM reset request ( usualy UEM damaged, or old jaf pcb until customer id 85xxxxxx must put a 33 pico capacitor b/w mbus-gnd)
mcuid EEEE - UPP don't respond to flash request routine.
Mcuid FFFF - cable problem. you must put an 3.3k resistor serial with bsi line and an 68k between GND and bsi
Error loading boot - Possible problems (RAM, UPP)
Error loading loader - Possible problems(RAM,UPP, FLASH CHIP), when you flash ape phones check for dku-2 usb cable.
error loading aditional loader - BT chip problems (skip BT may solve flashing problem)
Error erase - flash chip problem
Error cmd20 - BT chip problem
Error cmd14 - flash chip problem or old jaf pcb until customer id 85xxxxxx must put a 33 pico capacitor b/w mbus-gnd
When phone don't get into local mode always check for 68k resistor bsi-gnd
Có gì sai xót anh em góp ý thêm. thanks
