820-00850 5v

[thomamagic]

hello,
please need help for mainboard 820-00850
i have 5V and 0.120mA
We have replaced the CD3215 on this mainboard same problem
On big coil no have short
Thanks for help

 

[2informaticos]

Which CD3215 chips have been replaced?
ALl USB-C ports have the same behavior?

Do you get all expected LDOs on CD3215 chips?

 

[thomamagic]

i have replace all
yes with all usb-c have same
please, check picture for value usb-c
i have test this line :
pp1v8_upc_xb_ldoa : i have 1v8
pp1v8_upc_xb_ldod : i have 1v8
pp1v1_upc_xb_ldo_bm : i have 0V, no short on this line and 0.522 in diode mode

 

[2informaticos]

1V1_LDO_BMC should appear only on the powered port.

Check diode mode on the suspicious lines directly on J3300 and JB500.
Compare the readings between all channels.

 

[thomamagic]

do you have value in diode mode for this 2 fpc?
I don't have on flexbv, xinzhizao same
I have found this link but not correct motherboard

MacBook Diode Mode Measurements - LogiWiki

We have Apple MacBook and iPhone Diode readings and general fault finding information compiled by the leaders in this area

logi.wiki

 

[2informaticos]

OpenBoardData Project