Re: Voltaje range 5 to 20on Mabook air A2337 820-02016-A
Good Afternoon PPBUS_AON It is not stable, it varies from 6 to 12 to 19 and falls again and thus does the same cycle all the time.
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Re: Voltaje range 5 to 20on Mabook air A2337 820-02016-A
Hello Good morning and thanks for replay, i star back again to work in this board because i have so mucho to do, i finally i find a short but is a 25 volt line and go direct to the M1 processor, the line is PP1V06_S2SW_DRAM, you can tell me it is possible to inject voltage to see what component is to ground
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Voltaje range 5 to 20on Mabook air A2337 820-02016-A
Good days guys, I have a Macbook air M1 (820-02016-A) the fact is that when I connect it to the fuene the voltage ranges from 5 to 20 Volt and restarts again to 0 goes to 5 and 20 and so on, I have reviewed the values and the only one that gives me a little out of the ordinary is the PP1v25_S2 which should be 0.490 and is in 0.290 all others seem to be correct I have changed the usb C chip and I have programmed it and nothing remains the same, I need help
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Re: Macbook A2337 5V
Hello i hope you have a great day i have a 820_02016 (a2337) When I connect the usb charger the voltage oscillates between 3 volts then it goes to 5 volts it reaches 20 volts and then the cycle starts again I have checked PPBUS_AON and it has 12.30 volts but it is intermittent while PP3V8_AON_VDDMAIN has 3.8 volts I already used the U301 programmer for this model since I have seen that it could be the problem but nothing, could you help me thanks
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Re: macbook pro 820-00840 have image no backlight
So i have a time to take meditions and in this two test point i have
BSCL - 5v
BSDA - 5vLast edited by Sacred0489; 03-31-2023, 09:44 AM.
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Re: macbook pro 820-00840 have image no backlight
Excuse me, I have tested the voltages in the test points that are below the connector. I think that this is what you were referring to and I only get 5 volts. i attach a pictures with the connector and 11 volt...Last edited by Sacred0489; 03-31-2023, 07:47 AM.
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Re: macbook pro 820-00840 have image no backlight
BKLT_SCL 5.1 volt
BKLT_SDA 5.1 volt
so now i going to test with the cable to ground to see what i get
The voltage in gate LCDBKLT_EN_L is 12.60 but when i power on the mac droop to 11.46volt but PPVOUT_S0_LCDBKLT is still 0 volt...Last edited by Sacred0489; 03-30-2023, 10:06 AM.
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Re: macbook pro 820-00840 have image no backlight
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Hello, good afternoon, I have the same fault in 820-00850-A, I get 12 volts on both sides of the fuse, R8401 is fine, it has 80.6K and R8402 has 63.4K but my voltage is still 12 volts, I also don't have EDP_BKLT_EN, The resistance is correct any help i replace U8400 and Q8400 could you help me I'm starting in the world of macbooks...
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