Oppo R831K Can't init device, Reason: CMD Timeout Error
 

Hello Team. I have an Oppo R831K which has a BOOTLOOP problem (Wipe Data and Cache Fialed). I want to repair it via ISP but when i try to detect the EMMc it says "Can't init device, Reason: CMD Timeout Error".

Pic:
https://s1.postimg.org/k91ce6hrj/Untitled.png

Logs:

Z3X EasyJtag Software ver. 2.5.0.8

Loading eMMC Addon Firmware... IO: 2800 mV
Box S/N: 19014017947348C1, ,FW Ver.: 01.58
CMD Pullup Level:2041 mV
CMD Active Level:2609 mV
Box IO Level:2800 mV
CLK Rate:14000 khz
HiPower mode is off!
Can't init device, Reason: CMD Timeout Error
Done. :(

Z3X EasyJtag Software ver. 2.5.0.8

Loading eMMC Addon Firmware... IO: 2800 mV
Box S/N: 19014017947348C1, ,FW Ver.: 01.58
CMD Pullup Level:2052 mV
CMD Active Level:2609 mV
Box IO Level:2800 mV
CLK Rate:21000 khz
HiPower mode is off!
Can't init device, Reason: CMD Timeout Error
Done. :(

Any suggestion team???
Thanks in Advance :)

Check voltage???? try changing voltages

Hello. I already change the voltage and CLK rate many times still problem exist..Any suggestions???

any response from team????:(

Connection problem reconnect all resolder again. somtimes soldering irom damage parts.

Hello. Thanks for ur response. :)
I did what u say, recoonect all solder wires, i ******ed also the pinouts f correctly soldered. Still error apprear.

I tried to detect another phone like Oppo r1001 and its detected the emmc. I am confused why i can't detect the Emmc pinout for R831k perhaps i soldered i correctly.....

same case

Loading eMMC Addon Firmware... IO: 2800 mV
Box S/N: 19014017947348C1, ,FW Ver.: 01.58
CMD Pullup Level:2052 mV
CMD Active Level:2609 mV
Box IO Level:2800 mV
CLK Rate:21000 khz
HiPower mode is off!
Can't init device, Reason: CMD Timeout Error

1st set emmc voltage 1.8 volt io
2nd set clk rate 14mhz
3rd check 2.8 volt and 1.8 volt external power supply

And post reruslt

And most important post image emmc adapter

It's adaptor problem
Try to use 2.8v vcc and 1.8 vccq
Then play the emmc voltage in the software, try it first in 1.8 isp
You need to set also the clk rate,

I'm using dyi adaptor so i got 3 voltage option, which is 3.3v, 2.8v and 1.8v


If still the same disconnect vcc and vccq from the adaptor to mainboard and try to use usb

Mahirap talaga ang isp kisa sa direct to emmc!tsagaan lang


Br,

Same scenario on R831K..everything soldered well but still cant init problem

try ko nga suggestion ni kabayan Sniper_04..

Thanks

i have OPPO R831 same problem not conact volt up and down
this pinout not ok

Can't init device, Reason: CMD Timeout Error

many more member n product support answer this error.search before ask.
u can using 2 resistor 100ohm on vccq(1.8v) to cmd n dat0 on easy jtag adaptor...

if 100ohm no work, u can change 2x resistor 120/150/200ohm...try one by one..

br. tanZ

Do not solder vcc,vccq replace with plug to usb

Also throw clk resistor

here my adapter, u can try if u want

br.

Can;t see the image..Too small bro :(