MacBook Pro A1989 PP3V3 G3H short repair and MacBook Pro A1707 Charger not turning on USB-C meter repair: Difference between pages

MacBook Pro A1707 Charger not turning on USB-C meter repair
Device
Affects part(s)
Needs equipment
Difficulty
Type

Revision as of 15:52, 29 October 2023

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Problem description

When charging the A1707 MacBook with a USB-C charger and measuring the input current and voltage with a USB-C meter, the meter does not even turn on at all or 0 current.

Example image (Figure 1) -- No image yet. Help expand this page by uploading it!

Symptoms

MacBook not turning on.
All voltages missing.
Not charging.

Solution

Diagnostic Steps

Check PP20V_USBC and PPDCIN_G3H resistance

Measure the resistance between PP20V_USBC and GND with a multimeter on resistance mode
- if you read less than 50 ohms, you have a short, proceed to "Short on PP20V_USBC or PPDCIN_G3H" repair steps below
Measure the resistance between PPDCIN_G3H and GND with a multimeter on resistance mode
- if you read less than 50 ohms, you have a short, proceed to "Short on PP20V_USBC or PPDCIN_G3H" repair steps below

Faulty USB-C port

If both rails above are not shorted, it is highly likely that the USB-C port itself is shorted or damaged inside.

Repair Steps

Short on PP20V_USBC or PPDCIN_G3H

How to find short circuits

Inject 1V to the shorted rail using a Lab Bench Power Supply.
- With a thermal camera, identify the source of the short, most likely it is a capacitor
Replace the shorted component.
D3400 / D3300 are possible culprits

Shorted USB-C port

Replace the offending port.

Example video

@@ Line 1: / Line 1: @@
+{{stub}}
 {{Repair Guide
-|Device=MacBook Pro A1989
+|Device=
-|Affects parts=Motherboard
+|Affects parts=
-|Needs equipment=multimeter, soldering iron, soldering station, thermal camera
+|Needs equipment=
-|Type=Soldering
+|Type=
-|Difficulty=3. Hard
+|Difficulty=
 }}
-{{stub}}
 ==Problem description==
-Missing PP3V3_G3H on A1989 MacBook Pro
+When charging the A1707 MacBook with a USB-C charger and measuring the input current and voltage with a USB-C meter, the meter does not even turn on at all or 0 current.
 [[File:Placeholder image.jpg|thumb|Example image (Figure 1) -- No image yet. Help expand this page by uploading it!]]
 ==Symptoms==
 *MacBook not turning on.
-*Not charging
+*All voltages missing.
+*Not charging.
 ==Solution==
 ===Diagnostic Steps===
+====Check PP20V_USBC and PPDCIN_G3H resistance====
-==== Shorted CD3215 ====
+*Measure the resistance between PP20V_USBC and GND with a multimeter on resistance mode
-Inject 1V to the shorted rail and check with thermal camera which component is heating up, most likely it is one of the CD3215's
+**if you read less than 50 ohms, you have a short, proceed to "Short on PP20V_USBC or PPDCIN_G3H" repair steps below
+*Measure the resistance between PPDCIN_G3H and GND with a multimeter on resistance mode
-==== Corrosion on CB300 ====
+**if you read less than 50 ohms, you have a short, proceed to "Short on PP20V_USBC or PPDCIN_G3H" repair steps below
-If you don't have a short on a CD3215, you probably have corrosion on CB300. If you can't see it, that is because it is hiding under the metal around the NAND.
+====Faulty USB-C port====
+If both rails above are not shorted, it is highly likely that the USB-C port itself is shorted or damaged inside.
 ===Repair Steps===
+====Short on PP20V_USBC or PPDCIN_G3H====
+[[How to find short circuits]]
+*Inject 1V to the shorted rail using a Lab Bench Power Supply.
+**With a thermal camera, identify the source of the short, most likely it is a capacitor
+*Replace the shorted component.
+*D3400 / D3300 are possible culprits
+====Shorted USB-C port====
+Replace the offending port.
-==== Short on one of the CD3215s ====
+[https://www.youtube.com/watch?v=ssTL3pKda54 Example video]
-Replace the shorted CD3215
-==== Corroded CB300 ====
-clean the corrosion and replace the capacitor if still shorted.