MacBook Air A2337 820-02016 no power 5v

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  • master3112
    Senior Member
    • Mar 2024
    • 85
    • Slovakia
    #41
    R1583 each side = 0V

    PPDCIN_AONSW to ground = 5V
    My USB-Port Tester is connected between Board and Power-Adpater shows just 5V Input

      Comment

      • mon2
        Badcaps Legend
        • Dec 2019
        • 14269
        • Canada
        #42
        Each CD3217 features LDO rails. The active PD controller (mated to the USB-C port under use) will have all LDO rails enabled. Confirm the voltage of each PD controllers. Each must be working else you will not have 20v.

        Similar to these articles:

        CD3215 Bootup Sequence - LogiWiki

        CD3217 and T2 Power on Sequence - LogiWiki​

          Comment

          • master3112
            Senior Member
            • Mar 2024
            • 85
            • Slovakia
            #43
            I only have 5V at the USB-C input.

            I measured the outputs of the UF400/UF500
            PP3V3_S2_UPC = present
            PP3V3_UPC0_LDO = present
            PP1V5_UPC0_LDO_CORE = present
            I believe that the UF400/UF500 are fine.

            5V on the LC320 = present
            3V3 on the LC710 = present
            On the F5200 I have 11,92V
            ​
            When I connect the battery, I have a current draw of 0.445A
            The display briefly shows the message that the battery is charging.
            However, I cannot switch the device on.
            Without battery I have a current consumption of 0.001A​

              Comment

              • mon2
                Badcaps Legend
                • Dec 2019
                • 14269
                • Canada
                #44
                Remove all power. Disconnect the battery. Meter in resistance mode.

                Measure the resistance to ground on each pin on the battery connector (without the battery) @ J5150.

                Either color meter probe to ground (since this is a resistance check); other meter probe to pin #1. Repeat for each pin on the connector.

                We are testing to see if perhaps one or more of the TVS ESD diodes that protect the SMBUS (SCL / SDA) lines is blown from a transient event.

                Post each measurement.

                Click image for larger version Name: battery_connector.png Views: 0 Size: 86.8 KB ID: 3706391
                Last edited by mon2; Yesterday, 05:12 PM.

                  Comment

                  • master3112
                    Senior Member
                    • Mar 2024
                    • 85
                    • Slovakia
                    #45
                    Pin1 1M8 ohm
                    Pin2 1M8 ohm
                    Pin3 15M ohm
                    Pin4 14M ohm
                    Pin5 open

                      Comment

                      • mon2
                        Badcaps Legend
                        • Dec 2019
                        • 14269
                        • Canada
                        #46
                        No shorts here.

                        Attach the power adapter and carefully(!) measure the voltage to ground of:

                        PP1V8_S2
                        CHGR_AUX_DET (R5216)
                        C5220 (each side)
                        PPCHGR_VDDA
                        PPCHGR_VDDP
                        I2C_SMC_PWR_1V8_SDA
                        I2C_SMC_PWR_1V8_SCL

                        The above are to confirm the input conditions to the ISL9240HI.

                          Comment

                          • master3112
                            Senior Member
                            • Mar 2024
                            • 85
                            • Slovakia
                            #47
                            PP1V8_S2 = 1V8
                            CHGR_AUX_DET (R5216) = 1V23
                            C5220 (each side) Pin1 = 5V Pin2 = 5V
                            PPCHGR_VDDA = 5V
                            PPCHGR_VDDP= 5V
                            I2C_SMC_PWR_1V8_SDA = 1V8
                            I2C_SMC_PWR_1V8_SCL = 1V8

                              Comment

                              • mon2
                                Badcaps Legend
                                • Dec 2019
                                • 14269
                                • Canada
                                #48
                                Looks good to me.

                                Try a DFU:

                                https://maclovin.org/blog-native/202...ac-in-dfu-mode

                                  Comment

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