Macbook Pro 15" 820-2850-A no PPBUS_G3H

[Pinoyku66]

Hello have same issues with 820-2850 MacBook.

not getting PPBUS_G3H after U7000 getting 18 volts in pin5 from Q7030 but not in pins 1,2 &3 pin-4 gate was also zero volts checking U7000 pin 24 CHRG UGATE has zero, verify pin-19 VDD has 5.1 volts, pin-3 CHRG ACIN has 7.61 volts, pin-2 CHRG DCIN 16.89 volts, has a green lights in mag safe which I have a 3.4 volts in pin 14 SMC BC ACOK.

what condition that U 7000 suppose to have in order to put high voltage in Q7030 Gate? what else do you think I can check further.
Thank you guys in advance for your big help

[MobileXT]

Re: Macbook Pro 15" 820-2850-A no PPBUS_G3H

Did you replaced U7000 already?

[Pinoyku66]

Re: Macbook Pro 15" 820-2850-A no PPBUS_G3H

Thank you for replying

Yes I did

[Pinoyku66]

Re: Macbook Pro 15" 820-2850-A no PPBUS_G3H

Did more testing found that Q7080 in reverse current protection side not getting the PPDCIN_G3H in pins 1 &2 ( no gate voltage in pin-3) but have 18 volts in pins 4&5 because pin 6 (gate has 17.2 volts)

[MobileXT]

Re: Macbook Pro 15" 820-2850-A no PPBUS_G3H

Did more testing found that Q7080 in reverse current protection side not getting the PPDCIN_G3H in pins 1 &2 ( no gate voltage in pin-3) but have 18 volts in pins 4&5 because pin 6 (gate has 17.2 volts)

Q7080 is control by U7000. Please check voltage divider R7081, R7080 the gate should be lower than the input voltage in order to open the MOSFET.

[Pinoyku66]

Re: Macbook Pro 15" 820-2850-A no PPBUS_G3H

My U7000 VDD pin19 not getting the PP5V_CHGR_VDD which supposedly 5.1 volts but nothing where this PP5V_CHGR_VDD coming from?


Thank you guys

[dellxps15]

Re: Macbook Pro 15" 820-2850-A no PPBUS_G3H

pin-3 CHRG ACIN has 7.61 volts

pin 3 should get something like 4 volt check resistence R7010 r7011

check R7021 r7022 value

[piernov]

Re: Macbook Pro 15" 820-2850-A no PPBUS_G3H

pin-19 VDD has 5.1 volts,

My U7000 VDD pin19 not getting the PP5V_CHGR_VDD which supposedly 5.1 volts but nothing where this PP5V_CHGR_VDD coming from?

Please clarify.

[Pinoyku66]

Re: Macbook Pro 15" 820-2850-A no PPBUS_G3H

Did check these resistor they came out good ( resistance value) but where is the PP5V1_CHGR_VDD to power U7000 coming from. I am not getting voltage values on the pins because U7000 is not power on pin-19 VDD 5.1 volts is missing

[piernov]

Re: Macbook Pro 15" 820-2850-A no PPBUS_G3H

PP5V1_CHGR_VDD is created by the ISL6259 itself when it receives power on CHGR_DCIN.

[Pinoyku66]

Re: Macbook Pro 15" 820-2850-A no PPBUS_G3H

Thank you so much let me check those voltage divider again, R7010 30.1K and R7011 9.31K also R7021 and R7022 both 10ohms

[dellxps15]

Re: Macbook Pro 15" 820-2850-A no PPBUS_G3H

normal u700 voltage:

U7000 / ISL6259HRTZ
Pin01 = 0v (probe 200) CHGR_AGATE
Pin02 = 18.54v (measured on C7005) PPCHGR_DCIN
Pin03 = 4.46v (probe 176) CHGR_ACIN
Pin05 = 1.13v (probe 175) CHGR_ICOMP
Pin06 = 3.49v (measured on R7012) CHGR_CELL
Pin07 = 0.80v (probe 153) CHGR_VCOMP
Pin08 = 2.05v (measured on R7016) CHGR_VNEG
Pin09 = 0.04v (probe 154) CHGR_AMON
Pin10 = 3.48v (probe 962) SMBUS_SMC_5_G3_SDA
Pin11 = 3.49v (probe 1044) SMBUS_SMC_5_G3_SCL
Pin12 = 3.49v (probe 155) PP3V42_G3H
Pin13 = 3.18v (measured on R7000) CHGR_RST_L
Pin14 = 2.38v (probe 1018) SMC_BC_ACOK
Pin15 = 0.07v (probe 157) CHGR_BMON
Pin16 = 11.45v (probe 156) CHGR_BGATE
Pin17 = 12.27v (C7050) CHGR_CSO_N
Pin18 = 12.28v (C7050) CHGR_CSO_P
Pin19 = 5.08v (measured on R7001) PP5V1_CHGR_VDD
Pin20 = 5.07V (probe 202) PP5V1_CHGR_VDDP
Pin21 = 0.18v (probe 1036) CHGR_LGATE
Pin22 = GND
Pin23 = 11.84v (probe 1045) CHGR_PHASE
Pin24 = 11.92 (probe 1034) CHGR_UGATE
Pin25 = 16.01v (probe 214) CHGR_BOOT
Pin26 = 16.30v (probe 1050) CHGR_SGATE
Pin27 = 18.43 (C2070 ) CHGR_CSI_N
Pin28 CHGR_CSI_P = 18.43 (probe 201) CHGR_CSI_P


post your voltages on u7000.

you have still original u7000 or u already tried to replace it ?

[Pinoyku66]

Re: Macbook Pro 15" 820-2850-A no PPBUS_G3H

Thank you so much, here are y readings in U7000 ( just replaced it ), sorry not sure why when I posted the numbers move close to left side

U7000 / ISL6259HRTZ My reading
Pin01 = 0v (probe 200) CHGR_AGATE 0
Pin02 = 18.54v (measured on C7005) PPCHGR_DCIN 17.51
Pin03 = 4.46v (probe 176) CHGR_ACIN 4.24
Pin05 = 1.13v (probe 175) CHGR_ICOMP 0
Pin06 = 3.49v (measured on R7012) CHGR_CELL 1.706
Pin07 = 0.80v (probe 153) CHGR_VCOMP 0
Pin08 = 2.05v (measured on R7016) CHGR_VNEG 0
Pin09 = 0.04v (probe 154) CHGR_AMON 0.033
Pin10 = 3.48v (probe 962) SMBUS_SMC_5_G3_SDA 3.4
Pin11 = 3.49v (probe 1044) SMBUS_SMC_5_G3_SCL 3.4
Pin12 = 3.49v (probe 155) PP3V42_G3H 3.41
Pin13 = 3.18v (measured on R7000) CHGR_RST_L 3.41
Pin14 = 2.38v (probe 1018) SMC_BC_ACOK 3.27
Pin15 = 0.07v (probe 157) CHGR_BMON 0.045
Pin16 = 11.45v (probe 156) CHGR_BGATE 0.002
Pin17 = 12.27v (C7050) CHGR_CSO_N 0.024
Pin18 = 12.28v (C7050) CHGR_CSO_P* 0.023
Pin19 = 5.08v (measured on R7001) PP5V1_CHGR_VDD 5.071
Pin20 = 5.07V (probe 202) PP5V1_CHGR_VDDP 5.071
Pin21 = 0.18v (probe 1036) CHGR_LGATE 0
Pin22 = GND GND
Pin23 = 11.84v (probe 1045) CHGR_PHASE 0.055
Pin24 = 11.92 (probe 1034) CHGR_UGATE 0.052
Pin25 = 16.01v (probe 214) CHGR_BOOT 4.769
Pin26 = 16.30v (probe 1050) CHGR_SGATE* 17.27
Pin27 = 18.43 (C2070 ) CHGR_CSI_N 17.52
Pin28 CHGR_CSI_P = 18.43 (probe 201) CHGR_CSI_P 17.5

[dellxps15]

Re: Macbook Pro 15" 820-2850-A no PPBUS_G3H

how many omh on f7000 (without psu) ?
u7000 replaced was new ?
can u try with another dc-in and psu ?
can u pass again lateral solder of u7000 with thin tip and flux+leaded solder ?

[Pinoyku66]

Re: Macbook Pro 15" 820-2850-A no PPBUS_G3H

My board is 820-2850 so I don't have F7000 what I have is F7040 if that's what you mean, anyway it was 000.6 ohms, yes already replace U7000 and also did lot of flux to re-heat and performed lateral solder but don't have leaded solder so I used unleaded one. Use 85 watts Apple PS also bench PS set @ 18.5 volts with 4.6amps. And now is stop my bench PS about few seconds after apply voltage. Something shorting out but cannot find it I also use thermal gun but did not see something heating up. I am really confused now.

Thank you so much for your patience in giving me advice.

[dellxps15]

Re: Macbook Pro 15" 820-2850-A no PPBUS_G3H

yes i mean f7040. remove f7040, see if 12.5 volt comes in one side of f7040. check resistance in omh ( without power) on each poin of removed f7040. 1 side is PPBUS_G3H and other side is ppvbat_g3g_chrg_reg.

if low reading (Short) on one of this side do that:

if short is on PPBUS_G3H check u7201 if all looks ok. is so inject 1 volt and see if u7201 or something else get hot
if short is on ppvbat_g3g_chrg_reg check u7000 and inject 1 volt and see if something get hot near u7000

if nothing get hot, increase voltage step by step to max 2-3 volt.