Hi all, I am working on a MacBook logic board # 820-02020. It is stuck on 5v & the amps are fluctuating from .01amp to .14amp. There was a spill on ISL9240 so I replaced it with a Brand new one. On PPDCIN_AON_CHGR_R & PPDCIN_USBC_AON I should be getting 20V, where as the voltage is just 5.01V. On the 5V coil, the voltage is fluctuating. On PPBUS_AON F5200 the voltage is 12v (which seems to be ok) but it goes up & down from 11.2V~12.6V. On both the CD3217B12BCE output fuse (FF200 & FF201) 5V out here. What is causing all this 20V not to come through. Any help will be greatly appreciated. Thanks in advance.
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Re: MacBook 820-02020 stuck on 5v
Hi.
1) remove F5200, check the voltage to ground of F5200, pin #1. Is it now stable?
2) If the power adapter is @ 5v, then the CD3217 are not working correctly. Both need to be operational to dial up the 20v power delivery contract. Check the voltage of the LDO rails on each ACE controller (CD3217). -
Re: MacBook 820-02020 stuck on 5v
Thanks mon2., I am just leaving the workshop, have to go out., Will do this & inform you tomorrow. I think I checked the LDO 3.3V & 1.8V on these chip, they both are present but I will confirm tomorrow.Last edited by mferna14; 12-04-2022, 01:28 PM.Comment
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Re: MacBook 820-02020 stuck on 5v
ok mon2., I removed F5200 & all is stable now., 12.5V on pin 1 of the fuse is stable, LDO on the ACE Controllers are stable too or when the fuse was soldered, voltages on PP3V3_UPC0_LDO (3.3) & PP1V5_UPC0_LDO_CORE (1.5) were jumping too. What is the next step please?? ThanksComment
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Re: MacBook 820-02020 stuck on 5v
Hi. Spent better part of the day fixing the plumbing for the compressed air for the SMT line. Learned a lot and now we have dry air with no leaks.
Do you now have 20v being selected for the power adapter?
With no power, ppbus fuse (F5200) still removed, meter in resistance mode, what is the resistance to ground of the downstream (consumer) side of the ppbus fuse?Comment
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Hi mon2, did you solve it? I have the same problem and I don´t know what to do now.Comment
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iPromise - it will be better for you to start a fresh thread and post all of your details. Share the resistance to ground (not diode mode) at fuse F5200 (both sides) - no power during the resistance measurements.Comment
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hello everyone, let me ask, I have a macbook which is stuck at 5v and 0.03 A when tested with a usb tester. Previously I wanted to replace the screen on the device, but by accident I forgot to unplug the battery. This caused the MacBook to get stuck at 5v, previously I had replaced the CD3215 (U3100) IC because it was warm. After I replaced it the problem was still not resolved. Please guide. Thank you -
Hello,
I am currently working on a Macbook Pro A1990 (motherboard 820-01041) which is not charging.
The Macbook consumes 5V and 0.019A at USB-C. There seems to be a partial short-circuit on the PPBUS_G3H rail as I have 0V on this rail.
I've physically separated (by removing F7000 and F7001) PPBUS_G3H and the ISL9240 charging chip to see which side the short is coming from. Removing these fuses gives me 12.6V at the output of the ISL chip (PPVBAT_G3H_CHGR_REG).
However, I can't work out exactly why I don't have the PPBUS_G3H rail.
Here are the values... -
Hello, I have this Macbook A2141. It stuck at 5V / 0,075A. I measured all 4 ports, all the same. PPBUS_G3H is present but only 12,3V. Should be 12,6V ? according to this article : https://repair.wiki/w/MacBook_Pro_A2...w_at_5V_repair
PP3v3_G3H_RTC_X is present - 3,3V
PP3v3_G3H_SOCPMU is present - 3,3V
What else should I check?
Thank you for your help. -
Hi All.
I have an 820-02016 board (A2337 M1) that has come in for data recovery. Reported as liquid damage, but no visible evidence of any liquid damage.
Board was initially stuck at 5v, and current only spiking occasionally to around 400mA and cycling.
After initial troubleshooting, found that C7800 (which feeds the power rail PP5V_BSTLQ_VOUT_SPMU) was dead short to ground.
Replaced C7800 and short gone. Board still stuck at 5v. Current draw behaviour changed. It now spikes up for a second to around 100mA to 130mA, then drops down to... -
Hey guys, I need a little help here. I have a MacBook Pro A1708 820-00840 stuck @ 5V. Started off affecting just one port but now it's affecting both. Both CD3215 ics were replaced but the issue remains. One port does a loop and the other stays at a constant 5V. Both CD3215 have 3V incoming. I checked for PP3V3_G3H @ R3000, C3100 and C3108, R3001, C3200 and C3208. The weird thing is though that the ammeter shows the current draw (5V @ 0.5A) coming out from the port as opposed to it going in. Any ideas on helping me fix this?
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