820-00850 5v

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


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

Do you get all expected LDOs on CD3215 chips?
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


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Staff member
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.