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    Macbook Air 1466 Thermal Sensors

    I have two machines, both has sensors issues and reporting multiple senors failure in HWMonitor On first one fan is not full blast if I disconnect camera cable but reports many sensor failures. I'll try to obtain a fully functional A1466 with no sensor issues to test what is reported when...
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    Macbook Air 1466 Thermal Sensors

    Yes that is why it is so confusing. Two memory (bank and proximity), palmrest mainboard and airport. All 5 sensors to 128C even when trackpad is unplugged. I think this 'meomory proximity" is non existant.
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    Macbook Air 1466 Thermal Sensors

    Yes, I know that and already tried it. But I was expecting that my HW Monitor reports differently when trackpad is disconencted. Didn't expect airport proximity and mainboard proximity to stay 128C, I was expecting different reporting there no matter the fan full blast.
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    Macbook Air 1466 Thermal Sensors

    First of all, thank you all for your time. I have unplugged the touchpad flex cable 593-1604-B from the logic board, but same (in total 5) sensors still reported the same errors (128 deg C). I used external mouse and keyboard during this test and rhe same sensors are reported with high readings...
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    Macbook Air 1466 Thermal Sensors

    Yes, currently there are two laptops, both A1466 with the same/similar issue, one is 2014 and second one is 2015. On this from 2014, when disconnecting cable from J4002: Camera Connector, fan is not running full speed, so with help of 2informaticos it is concluded that it is most likely sensor...
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    Macbook Air 1466 Thermal Sensors

    I did try to use Prime 95, but after downloading and extracting archive, I have tried to start Prime95 and got the following message: "“Prime95” can’t be opened because Apple cannot check it for malicious software." Because of that I used CPU stress test and this is the diagram. Since CPU is i5...
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    Macbook Air 1466 Thermal Sensors

    I have installed Intel Power Gadget and make a test. I have opened youtubevideo, thunderbird, Libre Office Writer, Spreadsheet and Presentation and during that time diagrams is recorded and given in the attachment. Because frequency is not getting above 1 GHz, does this mean that this MBA is...
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    Macbook Air 1466 Thermal Sensors

    Ok, thank you. I can conclude that there is no throttling on this MBA, which is "under observation". These sensors are really confusing me. without special control app, fan would go full speed. But the laptop works normal, wherever I found information about failed sensors it was also followed by...
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    Macbook Air 1466 Thermal Sensors

    piernov, are these sensors labels same on 820-3437 and 820-00165 (A1466, years 2013-2017)? Q5810 is TS2P Camera Proximity Q5820 is THSP T29 Proximity Q5830 is Ta0P Inlet Q5840 is TW0P Wireless Proximity Q5850 is TM0P Memory Proximity Q5860 is TCHP Charger Proximity U5800 is TC0P CPU Proximity...
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    Macbook Air 1466 Thermal Sensors

    Thank you piernov. Just one more question. Usually when sensor fails, CPU starts throttling and computer is very slow. I have found some information about the "kernel_task" activity in Activity monitor. I can use the laptop and watch YouTube/Netflix streaming without any glitches. Maybe this is...
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    820-00239 no backlight after closing and opening lid

    Can you tell us which element on schematics (mark) did you change?
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    Macbook Air 1466 Thermal Sensors

    Hello, can someone please confirm that all A1466 MBA use the same trackpad flex cable? If I'm not mistaken this model is manufactured from 2013 to 2017.
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    Macbook Air 1466 Thermal Sensors

    Thank you 2informaticos, very helpful.
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    Macbook Air 1466 Thermal Sensors

    Yes, disconnecting cable that goes over I/O board caused fan to stop running at full speed. I wonder how this really works. Does BJT starts conduction when temperature is high or something else? On the schematics, I can see that base and collector of BJT are shorted, and for the NPN transistor...
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    820-00426 sensor issue?

    First you should download schematics. The thermal sesnors are shown on page 48 of the schematics (use Google to find it). There are two IC chips: U5850 and U5870. To these ICs many sensors are attached. U58050 is connected to "GPU PROXIMITY/GPU DIE/LEFT FIN STACK/RIGHT FIN STACK". This is most...
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    Macbook Air 1466 Thermal Sensors

    Thank you 2informaticos and piernov for the explanation. It is very strange to use use words proximity for thermal sensing since usually proximity sensors detects presence of an object in its vicinity. Anyway, @2informaticos, if you by "change LCD assembly" think this: that is ofcourse out of...
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    Macbook Air 1466 Thermal Sensors

    Hello guys, I'm inspecting the schematics of 820-3437 board and on page "Thermal Sensors"(page 44), there are a few acronyms such as: TBT,MLB, MLBBOT, TBD, CPU Proximity, Inlet ,DDR and BMON. What are these acronyms such as TBT TBD and MLB mean? How these sensors works? All I can see on the...
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    Need help understandig IC 74AUP1G09

    Thank you for the clarification!
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    Need help understandig IC 74AUP1G09

    Thank you piernov, but this is exactly what is hard for me to comprehend. If the output is floating, how come that pull up resistor ensures exactly 1.05V? All voltages around IC are 3.3 V and yet this 10 K resistor with 5% tolerance will pull up voltage to 1.05V so aacurately and precisely?
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    Need help understandig IC 74AUP1G09

    According to the truth table given in the datasheet, if both inputs are high (3.3V), the output is in the "Z state", whatever that means. When MOSFET works as a switch, and if Vcc is connected to the drain, and source is on ground, if the MOSFET is ON (conducting), Drain is connected to the...
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