MACBOOK AIR 1466 DEAD

[Yosua]

HELLO FELLOW COLLECTORS, How are you doing, I hope GOD always gives us good health, I'm here asking for help to work on this MacBook Air, to be honest, this is the first time I'm dealing with a MacBook machine, and I immediately decided that the ISL 6259 IC and after I replaced it it still didn't work and I found that the CHGR_CSO_N & CHGR_CSO_P pins had a short circuit.

can anyone help me guys?

[mon2]

The pins will appear to be shorted because of the very low current sense resistor between the 2 pins. Review the schematic to confirm.

Review this flow chart:

https://logi.wiki/index.php/G3_to_S3..._and_Broadwell

[Yosua]

Thank you for the time you gave to help me, after I checked the flowchart you gave, in the measurements from above, PP5V1_CHGR_VDD was not present, sir.

[mon2]

** revised post **

Measure the resistance to ground of U7100 - PP5V1_CHGR_VDD. Usually this means that U7100 is defective and needs to be replaced but share the measurements first.

[Yosua]

hi, thanks for your response and direction for me,

here are the measurements with diode mode:

pin:
1. CHGR_AGATE 537 ohm
2. CHGR_DCIN 524 ohm
3. CHGR_ACIN 457 ohm
4. CHGR_VFRQ 392 ohm
5. CHGR_ICOMP 592 ohm
6. CHGR_CELL 99 ohm
7. CHGR_VCOMP 565 ohm
8. CHGR_VNEG 460 ohm
9. CHGR_AMON 574 ohm
10. SMBUS_SMC_5_G3_SDA 452 ohm
11. SMBUS_SMC_5_G3_SCL 456 ohm
12. PP3V42_G3H 246 ohm
13. CHGR_RST_L 505 ohm
14.SMC_BC_ACOK 404 ohms
15. CHGR_BMON 577 ohms
16. CHGR_BGATE 554 ohms
17. CHGR_CSO_N 371 ohms
18. CHGR_CSO_P 592 ohms
19. PP5V1_CHGR_VDD 395ohm
20. PP5V1_CHGR_VDDP 401 ohms
21. CHGR_LGATE 372 ohms
22. gnd
23. CHGR_PHASE 371 ohms
24. CHGR_UGATE 644 ohms
25. CHGR_BOOT 501 ohms
26. CHGR_SGATE 545 ohms
27. CHGR_CSI_N 617 ohms
28. CHGR_CSI_P 533 ohms

And after I replaced U7100, now PP5V1_CHGR_VDD has shown 5v, but the gate on the Q7130 mosfet has not opened.

does this mean the new U7100 is also damaged?

[mon2]

Where these measurements in DIODE mode or RESISTANCE mode?

In DIODE mode, these will be voltage measurements so each line will be in units of volts. For example, line 28 = 0.533 volts. Please confirm.

What is the exact voltage to ground of PPBUS_G3H @ F7140?

[Yosua]

Sorry sir, I was wrong, my measurement above was diode mode with the red probe position on ground, and for the PPBUS_G3H @ F7140 line it was 378 in diode mode

I don't think there is a short here, correct me if I'm wrong?

[mon2]

17. CHGR_CSO_N 371 ohms
18. CHGR_CSO_P 592 ohms

Was expecting both pins to have similar measurements. Configure the meter to resistance mode. If manual meter, select the lowest resistance scale. Place one meter probe directly on pin 17 and the other probe directly on pin 18. No power to the board.

What is the exact measurement in ohms? This is the full current sense path resistance for the battery charge circuit. Does the resistance match the schematics?