820-02020-A CD3217

[Soji]

One of the charging port not working doesn't turn on ammeter at all.
I found UF400 is the corresponding CD3217 for the port..i replaced it and DF622 still no changes..
Now i just found DZF664 has a hole in it i changed it too still no changes..
I compared diode mode readings of PP1v5_upc1_ldo_core
PP3v3_upc1_ldo to good board values are ok

 

[2informaticos]

Compare diode mode readings between USB-C ports for more test points.
Start checking CC1/2 lines.

Be sure FF200 is good.

 

[Soji]

faulty board
Usbc0_cc1=0.588
Usbc0_cc2=0.586
Usbc0_sbu1=665
Good board
Usbc0_cc1=0.598
Usbc0_cc2=0.593
Usbc0_sbu1=0.666
FF201 and FF200 is good

 

[Soji]

I dont know what just happened
The board just powered on with battery only.
Draws 5v with charger only with both ports now.
Ppbus_Aon is 12.06V with charger only
12.60 with charger and battery

 

[2informaticos]

So the board works with battery alone, or battery plus charger?

One USB-C port still black screen on meter?
You should compare diode mode readings on the JF600 lines.

 

[Soji]

The board works with battery alone..
Both ports display on the ammeter now.

 

[Soji]

I have compared JF600 line with working board no difference

 

[Soji]

with the board alone on desk,both USBC ports draws 5V 0.20mA at the ammeter
PPBUS_AON is 12.03V

 

[2informaticos]

Check UPC_I2C_INT_L and UPC_SMC_I2C_INT_L voltage; compare with good board.

You can try DFU...

 

[Soji]

UPC_I2C_INT_L=0V
Diode mode=0.334
UPC_SMC_I2C_INT_L=0V
Diode mode=0.335

 

[2informaticos]

Did you try DFU?

 

[Soji]

the system not entering DFU..

 

[2informaticos]

Try wire method with SV004/5 pads.
Solder RV005, if is not present.

 

[Soji]

How will i do that please?..

 

[2informaticos]

https://logi.wiki/index.php/DFU_Mode_Restore_(Macs)#100.25_direct_DFU_mode_using_jumper