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Old 03-04-16, 03:29 PM   #1
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Lights 1 ERROR: EMMC WAS NOT Detected! (CMD1)--Solution

Error --

"1. DO NOT USE THE PHONE"S BATTERY
2. Connect the Soldered TP Connections to ATF Box
3. Disconnect the USB Cable and Wait until the
the ATF Software will tell you to Connect the USB."

ERROR: EMMC WAS NOT Detected! (CMD1)
Check your Test Point Soldering!
CMD1 Reply: 0x00000000


ADAPTER USED --ATF 4in1 Adapter V2


Solution --

1. Check and confirm soldering is perfect. Reduce wire length as low as 5cm

If you are getting same error --

2. --

4 in 1 Adapter --


  • Check 1.8V, 2.8V And 3.3V are OK
  • 3.3V may be near 3V only--IF 3.3v is not OK continue --IF OK Please STOP HERE and excuse me

Why 3.3V is not OK??



  • There should be at-least 1.25V difference between Input and output of AMS117 series regulators
  • Its a 5V to 3.3V regulator

Input for AMS117 3.3V regulator?




  • Input of AMS117 - 4.2V
  • Output expected 3.3V But since min. V difference between I/P and O/P is 1.25V, SO , obtained O/P 4.2V-1.25= 2.95V

So the 3.3V is not getting.

What to do?


  • Remove AMS117 3.3V regulator
  • Provide 3.3V externally.
  • Set max current 200mA
  • Vcc - 2.8V , Vccq - 3.3V
Note-- If Box goes OFF when connecting adapter, remove R3 (zero ohm R) near sd-card connector



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Old 07-11-19, 12:22 AM   #2
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Default Big fan of this post, so thank you for your efforts!

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Old 07-11-19, 12:23 AM   #3
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Default Big fan of this blog, so thank you for your efforts!

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Old 08-11-19, 09:20 AM   #4
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Old 11-11-19, 05:06 AM   #5
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