STEP 4 : How to find Vcc
<<< FOR QUALCOMM BASED PHONES, YOU DO NOT NEED VccQ and VCC >>>
<<< You just need to Connect USB Cable to Phone PCB >>>
<<< Proceed to STEP 5 on How to find DATA Test Point >>>
DO NOT USE TP CABLE FROM STEP 1 for finding VCC.
Finding VCC Requires another TP Cable which you can make using your current
External Power Adapter for eMMC.
You need to Prepare your External Power Adapter with a TEST POINT PIN on 3.30v Like This:
http://174.120.45.27/tmp/EMMC_VCC_FINDER_SCHEMATICS.jpg
1. Solder CLK Test Point Found from STEP 2 into the Phone PCB
2. Solder CMD Test Point Found from STEP 2 into the Phone PCB
3. Solder VccQ External Power 1.80v~2.80v from STEP 3 into the Phone PCB
4. Solder GROUND Connection from ATF RJ-45 to the Phone PCB.
5. Solder GROUND Connection from External Power Adapter to the Phone PCB.
http://174.120.45.27/tmp/EMMC_VCC_FI...ONNECTIONS.jpg
On ATF Software, Make the necessary Settings for eMMC Finder Loop:
http://174.120.45.27/tmp/TP_FINDER_VCC_SETTINGS.png
In this Example, I tried all the Locations that were marked with RED
DO NOT TRY TO TP a RESISTOR, it is NEVER CORRECT for VCC
Capacitors are BROWN in COLOR
Resistors are BLACK in COLOR
ONLY TRY TO TP Capacitors
http://174.120.45.27/tmp/eMMC_Finder_VCC.gif
When you have connected the testpoint cable to the correct Vcc Test Point, the ATF Software will announce to you
that the VCC Pinout has been located.
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