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Voltage / diode mode L7630 7mV, no pulse / 0.148 L7310/20 0V, no pulse / 0.068 L7430 163mV, no pulse / 0.134 L7520 1.370 ~ 1.261V, without pulse / 0.427 L7560 3.35V / 0.149 L7195 5,5V L3095 0V, no pulse / 0,526V L7130 12.45~12.61V SMC_PM_G2_EN 3,42V

7 - 0V, pulsing 3V. 3 - 0V, pulsing 2,3V

Good afternoon, this Mac came in for repair of the headset not working on one side, I fixed it by changing the U6201. In the final tests the mac stopped turning on, I checked that there was oxidation in the Q7630, I replaced it but with no result. Sometimes it wouldn't give led in the...

Good morning this mac suffered oxidation in the region U1950,Q8150 and U8160, I replaced it, but it won't turn on. Voltage: PPbus 8,59V PP3v42 3v42 all_SYS 0V, pulses to 3V PLT_RST 0V. PM_DSW_PWRGD 3,4 PCH_DSWVRMEN 3,24V SMC_ADAPTER_EN 3,4V PM_BATLOW_L 3,3V PCH_CLK32K_RTCX 0,428V V...

So how should I identify a short in the MOSFET without applying a voltage to the PPBUS?

Good morning, this mac is shorted on the PPBUS, we applied voltage to identify the component and identified that the U7410 was causing the short. I replaced it, PPBUS now with 13V, however, there is no activity on the USB and it won't turn on. Imagine that the CPU died, right?

PM_RSMRST_L 0V, no pulse when SMC_ONOFF is triggered. PM_PWRBTN_L starts high at 3.39V, when triggering the SMC_ONOFF drops 0.127V.

And there is no solution for this?

Yes, there are signs of oxidation U9080, L9081, C9086, and C9080.

mode diode: UB300 PP1V8_UPC_TA_LDOD 498 PP1V8_SLPS2R 406 PP1V1_UPC_TA_LDO_BMC 535 PP3V3_UPC_TA_LDO 514 PP1V8_UPC_TA_LDOA 540 UB400 PP1V8_UPC_TB_LDOD 500 PP1V1_UPC_TB_LDO_BMC 425 PP1V8_UPC_TB_LDOA 540

now there is no more PPbus 0.1v

I am having the same problem, has anyone got a solution?

The only coil that pulses are L7560, it gets loud when you trigger SMC_ONOFF_L.

what can i do?

This is exactly what happens. This test is only possible with the battery connected. There is a strange sound coming from the PCH.

Good morning, this mac was shorted on capacitor C9087, replaced it, solved the short, but the mac still won't turn on. I tried to restore in DFU mode, but it gives an error when restoring. Voltage: PP1V2_AWAKE 1.2V PP1V8_AWAKE 1,8V PPVDDCPU_AWAKE 0.754V PP0V8_SLPS2R 0.79V PP1V8_SLPS2R 1.8V...

17/18 3,5Ohm 2728 20Ohm does not accept SMC Bypass.

PP3V3_SUS gets 3,34V only when SMC_ONOFF_L is triggered. Sometimes it turns on when it is tested on battery.

Yes, this is exactly what happens.