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モデル番号はA1706 / EMC 3071ー2017年6月発売。この13インチMacBook ProはKaby Lakeプロセッサが搭載されています。最大4.0 GHzのTurbo Boost付き3.5 GHz Core i7です。

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Fan stuck on max immediately after boot. (Thermal Paste Replaced)

Macs Fan Control temps are all normal ( 35-40˚C) but the right fan is stuck at 8800~ rpm when it should have been 6864 rpm at max. I did try reinserting and cleaning all the cables connected to the logic board as well as resetting the SMC but the problem persists.

Apple diagnostics show an error of PPF03, meaning a fan data control line might be the cause. Does anyone know where that data line is? Or if so, which of the cables connected to the logic board is responsible for the fans?

UPDATE: Searching the internet, it may be a sensor issue, but all sensors seem to be normal. (Here is a screenshot; In case something is missing)

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Update (10/25/2019)

Update: Soo I have obtained the schematics and the circuit which controls the fan speed has transistors Q6000 and Q6050. Upon rechecking my board, get this.

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Looking a bit closer, there should be two small black boxes, one on top and the other on the bottom.

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It seems that upon reassembly, these components were scraped from their pads. Problem is, I can't find them. Pretty hard to buy one either.

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Looks like you are missing:

- Q6050, Diodes Inc. DMN32D2LFB4R6051

https://octopart.com/search?q=DMN32D2LFB...

- R6051, 100k 5% 1/20W 0201 resistor

https://octopart.com/search?q=100k+1%2F2...

Not sure about the components to the right of this, which are related to backlight current sensing.

- R5730, 1% 1/3W

https://octopart.com/erj-3lwfr005v-panas...

-U5730, Opamp INA210, UQFN

https://octopart.com/search?q=INA210+UQF...

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The error is a logic board error. You’ll need to trace out the logic to find the defect.

Sadly, Apple has done a good job controlling their schematics and board view drawings. The only thing out their is an incomplete schematic & drawing which is missing the fan control logic.

You’ll need to bring in or ship your system to Apple for repair. Do you have AppleCare+ that will soften the bite otherwise its quite expensive.

Your other option is just replace the logic board your self Mid 2017 13” MacBook Pro retina Touch Bar Logic Boards

We don’t have a proper guide but the 2017年 MacBook Pro 13インチモデルTouch Barの分解 should give you enough information on how its mounted and follow this guide first steps to make sure your system is fully off before starting MacBook Pro 15" Touch Bar Late 2016 バッテリーの交換

Update (10/26/2019)

@mrman - Yes, your logic board is missing some components! Looks like they got snagged.

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These are the fans tach control logic.

If you can’t find them at one of the part houses or a junker board to steal them then you’ll need to replace the logic board.

MacBook Pro 13" Touch Bar 2017の画像

ガイド

2017年 MacBook Pro 13インチモデルTouch Barの分解

難易度:

普通

MacBook Pro 15" Touch Bar Late 2016 バッテリーの画像

ガイド

MacBook Pro 15" Touch Bar Late 2016 バッテリーの交換

難易度:

難しい

1 - 3 hours

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Thanks, Dan, for the answer. Sadly, there are no official Apple repair centers in my country, just authorized ones. And they even charge ~45$ just to get it diagnosed and charge me a kidney for a simple fix. I'd rather repair it myself.

In the meantime, I disconnected the said fan for the time being. Temps are still okay thankfully because of the other fan still working.

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Victor Emmanuel Baylosis さん、ありがとうございました!
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