Deluccia
Member
Last Activity: 03-18-2025, 12:09 PM
Joined: 08-10-2017
Location: exeter
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Thank you!!... -
Any luck finding this?Leave a comment:
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I cant seem to open this in FlexBV. Says it cannot be decoded?...Leave a comment:
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Re: question about TPS51980B at 820-01987
Any verdict on this?Leave a comment:
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Re: Trace identification on 820-001987-06 Logic Board (MBP 13" A2289 2020)
Pp5v_g3sLeave a comment:
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Re: A2289 Board 820-01987-A Dead?
I have a very similar issue myself.
Have a A2289 board that "boots" without battery at 20v 0.5A with trackpad, warm CPU and fan spin.
No display nor Touch Bar. Had liquid damage around U7420 and Q7065 mostly.
I wish there was a definitive check list of rails to test in order to determine what can irrefutably diagnose a major component failure.
I find I am good at locating offending components but I struggle to know if I'm always looking in the right places in terms of what is essential to be...Leave a comment:
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Re: Macbook pro M1 A2338 820-02020 schematics boardview
Thank you so much this is absolutely fantastic.
The people on this platform are a great asset to the progress of the industry....Leave a comment:
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Re: MacBook Pro 13-Inch 2020 — 820-01987 (A2289), 820-01949 (A2251)
I can't seem to be able to open these in Boardview? What do I need to run this in boardview or what software do I need to see a .bvr file?
Thanks...Leave a comment:
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Re: MacBook Pro 13-Inch 2020 — 820-01987 (A2289), 820-01949 (A2251)
Thanks! Thats fantastic!Leave a comment:
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Re: 820-01958 MBA 13" '20 A2179 Schematics/bv request
Thank you Harryrepair
Much appreciated!
I have U8600 getting super hot in one corner and trying to work out which line it is.. Hopefully there will be a .brd file available soonLeave a comment:
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Re: 820-01814-A schematic
Thanks SMDfleaLeave a comment:
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Re: Boardview and schematics for 820-00239-A Macbook pro touchbar?
Thank you so much!
This forum is fantasticLeave a comment:
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Re: A1708 (820-00840) power issue
Yeah I know I'll be back to it tomorrow.
These newer models Im not as familiar with to be honest.
I have written and printed a check list i go through for the Air and retina boards but I am unsure with the 2017 and newer boards in terms of order to check and from where they derive from.
I'll get there In time.
Thank you so much for your help.Leave a comment:
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Re: A1708 (820-00840) power issue
Not working, no fanspin.
All_SYS_PWRGD missing.
I'm going to pull my own lips offLeave a comment:
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Re: A1708 (820-00840) power issue
Q7960 removed tested and replaced.
Now have PPBUS_G3H at 12.95V!!
going to put it in and see whats workingLeave a comment:
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Re: A1708 (820-00840) power issue
Okay Q7960
Pin 3: 0.3V
Pin 4: 0.3V
Pin 5: 0V
R7969 fuse is goodLeave a comment:
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Re: A1708 (820-00840) power issue
Okay,
Interesting..
L8030: 238
L8060: 205
L7960: 0
L7900: 31
L7730: 220
L7690: 369
L7670: 444
L7430: 34
L7370: 40
L7220: 36
PPBUS_G3H still 0.3VLeave a comment:
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Re: A1708 (820-00840) power issue
Correct,
I'll boot up board-view and check now!Leave a comment:
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Re: A1708 (820-00840) power issue
Hi, Yes tested in OHMS not diode.
Just tested in diode and found 0.061 anyway.
Sorry didn't specify that previously.
Any ideas where to start?
Really pulling my hair out here, I have a donor board so happy to try everything.
Thanks again for helping meLeave a comment:
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Re: A1708 (820-00840) power issue
Hello,
Thanks for your reply.
Yes thats correct, positive to ground beeping at 061 on PPBUS_G3H
DCIN is 20.3V
PP3V3_G3H is 3.4V.
I am looking through schematic to see if there is any components that take in PPBUS_G3H and convert it to a computing power rail, sort of like the retinas did with S5_HS_COMPUTING.
EDIT: Found it, PPBUS_G3H converts to PPBUS_PMIC at R7835.
PPBUS_PMIC has the same 061 beeping to ground.
U7800 removed, still 0.1V on PPBUS_G3HLast edited by Deluccia; 05-30-2019, 04:57 AM.Leave a comment:
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