obelix24
Senior Member
Last Activity: 04-22-2024, 01:29 AM
Joined: 06-18-2023
Location: Kosice
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mon2[USER="295753"]mon2[/USER] do you think it's ok ? -
battery health is : 87%
Cycle count : 440
Condition : Normal
in app stats (from GitHub) it's showing health 81%
I don't have any other battery to test I expect this one is good.
I've checked with thermal camera when MacBook was turned off and there was only one spot near U7700 that was warmer ... It looks like it was one of the diodes
I've checked diode mode on near caps C746, 745, 744 and the result was 0,03V (battery connected)
But when I turned on MacBook and checked voltage there it was normal 1,06V ([B]PP1V06_S2SW_DRA...Leave a comment:
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ok today i received backlight and now when backlight is connected is working
But i noticed one thing when i turned macbook battery was 0% and i know that i've charged it few days ago to 100% ... so it's discharging ... is there any way how i can found what is discharging it ? there must be something draining battery but how to find what ?...Leave a comment:
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Macbook Air a1932 (820-01521) 20V 0.1-0.2A
I got one Macbook Air a1932, when i connect charger it takes 20V and 0.1 - 0.2A.
Trackpad is clicking (this means T2 is ok ???)
I can put macbook to DFU and revive, restore via Apple Configurator.
Problem is that there is nothing displayed, no chime, no caps lock light and it looks like is not turning on (as even with battery connected it's still only between 0.1 - 0.2A)
I've tried connecting to external monitor and also no output ...
I'm not able to find anything what can cause this ... I've tried to replace U8110 but still the same behavior... -
check if the connector on motherboard where you connect audio board is ok. I have this issue on other macbook connector where audio board flex was connecting wasn't making good contact on one side (with naked eye it wasn't visible but under microscope it was clear that the issue is there) and therefore i was able to see speakers, increase / decrease audio, audio via headphone jack was working but internal speakers where not outputting any sound.Leave a comment:
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ok so audio issue was fixed connector ([B]J6799[/B]) on motherboard was broken on one side and wasn't doing good connection. I've replaced it (hot air from bottom on donor board to remove it) and on actual board i've scraped it with soldering iron, cleaned pads and then with hot air it was much faster to solder it back to place ok so audio issue was fixed connector ([B]J6799[/B]) on motherboard was broken on one side and wasn't doing good connection. I've replaced it (hot air from bottom on donor board to remove it) and on actual board i've scraped it with soldering iron, cleaned pads
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OK i've found that in right speaker connector there was small piece o wire and this was shorting few pins together, after removal left speaker was working but the right there was no sound. I've replaced right speaker and when i started macbook i got sound from both spekers ...
I was hapy that everything is working, but then i turned off macbook and when i turned it on again there was no sound
I tried to reinstall MacOS if it's not just some weird configuration but the sound is still not working....
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OK finaly i got it
problem was that [B]PP5V1_S4SW_CC1[/B] was shorted to ground I was checking via diode mode on [B]J4700[/B] [B]PIN52 [/B]and the reading was 0,003V
It looks like the trace was going only to [B]U7860[/B] but even with this IC removed short was still there. I've soldered little wire to pin 3 (U7860) and injected 0,9V it was taking only 0,3A and nothing showing on this side of the board, i've flipped the board and [B]U4700[/B] was getting hot after removing this short was gone I've soldered new [B]U4700 [/B]and checked diode reading [B]PP5V1_S4SW_CC1[/B]...
Last edited by obelix24; 03-11-2024, 05:56 AM.Leave a comment:
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ok after some time i've returned to this board.
I noticed that there was cracked IC [B]U8310 [/B](there was missing corner where [B]PANEL_P3V3_EN[/B] is but macbook was working even with this - strange) i've replaced it.
I've connected official 61W USB-C charger with ampmeter and i was surprised that macbook was taking 19V and charging battery fine. When i turned cable 180 degrees there was nothing ampmeter was not turned on at all. I've tried also 15V (nintendo switch charger as i don;t have official 29/30W from apple) but this should be fine ... also only one side...Leave a comment:
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I found one thing i've disconnected Trackpad flex cable from motherboard but everything else stay connected (except keyboard backlight) macbook started and there was logon screen but keyboard was not working at all (even it was connected). When i connect trackpad flex keyboard was working again.
Is this normal behavior ?...Leave a comment:
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I tried DFU few times but the problem is still the same
i've tried to replace UR200 from donor board but after replacemet macbook behaves strange ... backlight was off, when i go near power button with my finger backlight starts but the screen was turning on and off i immediately returned old UR200 and it's working fine (but still the same issues no camera detected and touch bar working after 3 min or after closing and reopening lid)Leave a comment:
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I had simillar issue on a2338, macbook was taking only 5V 0,2A ... PPBUS_AON was only 0.07V (diode mode). When i was injecting voltage here (PPBUS_AON pad on F5200) 1V it doesn't show anything so i slightly increased voltage to approx 2,3V and on thermal camera i noticed that UR730 was getting warm after replacing macbook starts with 20V.
maybe this will help....Leave a comment:
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But this touch bar doesn't light up with desktop. I'm already in macos and the touch bar is still black (but it responses as whene i touch finger where icons should be i can operate volume, brightness, ...
Issue is that it lights up after some time (i've checked and it's approx 3 minutes) or when i close and reopen lid (then it's still on if macbook goes to sleep and wakes up it's still working. I've tried few times DFU (revive, restore, reinstall) nothing helped.
I don't know maybe it's connected to the camera that is not recognized (maybe it's waiting for some sensor...Last edited by obelix24; 03-04-2024, 07:53 AM.Leave a comment:
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I've returned to this macbook and 3 ports are working 20V ... One port was taking only 5V and 0,2A
I've tried to replace CD3215 for this port 3x and still the same issue ... but now it's not turning on ampmeter on this port at all, on other ports still 20V but macbook doesn't turn on (no chime, anything)
I found out that i can't measure resistance to ground on [B]PP20V_USBC_TA_VBUS[/B] (on other port's i'm getting correct value) here it's only trying my multimeter is no able to get value ...
I tried to remove everything from that line [B]PP20V_USBC_TA_VBUS[/B]...Last edited by obelix24; 03-04-2024, 01:40 AM.Leave a comment:
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in the meantime waiting for backlight keyboard i'm wondering how can i fix touchbar ... It's working fine but when i turn on macbook touch bar doesn't light up, but it respond on touch, also when i close the lid (LCD is turned off i was slowly closing lid and i can see that screen turns off when there is small gap only) and reopen touch bar is visible. Also if i turn on macbook and leave it as is after approx 3 min touch bar is visible ...
I don't understand what can cause this strange issue. probably some doggy capacitor, resistor but how to find it ?...Leave a comment:
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ok so finally I got it working I've turned on thermal camera and slightly increased voltage input on PPBUS_AON from 1V to approx 2,3V and UR730 was getting hot (same as on video I've posted on previous page). Replaced UR730 reconnected everything and now MacBook is turning on and taking 20V
I've connected everything except keyboard backlight as I'm little bit scared if this haven't cause short on UR730 ... I will probably order keyboard backlight directly for a2338.
one thing ... when I turned MacBook there was popup and os is damaged and needs to be reinstalle...Leave a comment:
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mon2[USER="295753"]mon2[/USER]any idea ?Leave a comment:
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I've removed F5200 and checked in diode mode both pins on
[B]PPVBAT_AON_CHRG_REG[/B] - [B]0,5V[/B]
[B]PPBUS_AON[/B] - [B]0,07V[/B]
I've tried to inject 1V to PPBUS_AON side but it's taking nothing 0AI've removed F5200 and checked in diode mode both pins on
[B]PPVBAT_AON_CHRG_REG[/B] - [B]0,5V[/B]
[B]PPBUS_AON[/B] - [B]0,07V[/B]
I've tried to inject 1V to PPBUS_AON side but it's taking nothing 0AI've removed F5200 and checked in diode mode both pins on
[B]PPVBAT_AON_CHRG_REG[/B] - [B]0,5V[/B]
[B]PPBUS_AON[/B] - [B]0,07V[/B]Leave a comment:
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Voltage to ground power adapter connected
[B]PP1V25_S2[/B] - 0V
[B]PP1V8_S2[/B] - 0V
[B]PP3V3_AON[/B] - 0V
Diode mode
[B]PP1V25_S2[/B] - 0,280V (tested on CF735, CF230)
[B]PP1V8_S2[/B] - 0,340V (tested on CF503, CF403)
[B]PP3V3_AON[/B] - 0,400V (tested on RD208, RD207)
but i'm still confused as on [B]PPBUS_AON[/B] on [B]F5200 [/B]i'm getting in diode mode only [B]0,07V[/B] (on other board that i have i'm getting there 0,506V) according to [url]https://openboarddata.org/?a=showboardsolutions&bpath=laptops/apple/820-02020[/url] 0,5V...Last edited by obelix24; 02-28-2024, 01:57 AM.Leave a comment:
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