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  1. O

    A1990 doesn't turning on

    Hey , I checked the board today . here is what i have till now : First : all the USB C port are stuck on 5v and drawing 250mA. 1. All The LDO rails of each CD3215C are on, of course the LDO 1.1V is on for each ACE when its connected to power adapter. 2. PPBUS_G3H :12.3 v 3. U2890 flash...
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    A1990 doesn't turning on

    Hey , Before replacing U3100 i looked once again on the trace to U2890 . Than i saw that U2890 is a little bit off its pads. Reflow it and U3100 and U3200 are now on 20v . Than unfortunately, the board fell on ground and bend a little bit . now all the USB C ports presents 5v and drawing 250mA...
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    A1990 doesn't turning on

    Hey , When You say : " If one CD3215 doesn't communicate with SMC, will not get 20V on any port " , you mean that in the ACE controller pair , even if one of them is faulty , none of them will generate 1.1v LDO and this is why the 20v will not be generate? ( for example if U3200 is faulty and...
  4. O

    820-00840 19.5v on one usb and 5.17v on the other

    Hey , This is what i have right now, my Mac 820-01401A on UB300 and UB400 20.2v with 110mA . on U3200 and U3100 5v with 380mA-390mA. i guess that the 1.1v_LDO rail of the 19.5v is present and in the other ( 5.17v) is not. Did you check for short on the 1.1V_LDO rail ? Does the other LDO...
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    A1990 doesn't turning on

    Hey , Thank you very much. I got the new CD3215 from your store :) , bought 2 chips from you and two other from beetstech. But the soldered on is from your store. yes , they have the same termination code C00. I checked U2890 : Pin1 TBT_X_SPI_CS_L : 3.3v Pin2 TBT_X_SPI_MISO : 3.33v Pin3...
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    A1990 doesn't turning on

    Hello , I have A1990 2018 macbook pro . The MB number is: 820-01041A. A little bit of water touched the USB C port of U3200 and U3100 ( i think that only in one of them ). No trace of liquid damage . Here is the situation: At the beginning all the 4 USB C ports were stuck on 5V and draw...
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