MacBook Pro A1989 Charger not turning on USB-C meter repair: Difference between revisions
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(Created page with "{{stub}} {{Repair Guide |Device= |Affects parts= |Needs equipment= |Type= |Difficulty= }} ==Problem description== When charging the A1989 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.thumb|Example image (Figure 1) -- No image yet. Help expand this page by uploading it! ==Symptoms== *MacBook not turning on. *All voltages missing. *Not charging...") |
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{{Repair Guide | {{Repair Guide | ||
|Device= | |Device=MacBook Pro A1989 | ||
|Affects parts= | |Affects parts=Motherboard | ||
|Needs equipment= | |Needs equipment=multimeter, soldering iron, soldering station, thermal camera | ||
|Type= | |Type=Soldering, Micro-Soldering | ||
|Difficulty= | |Difficulty=3. Hard | ||
}} | }} | ||
{{stub}} | |||
==Problem description== | ==Problem description== | ||
When charging the A1989 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!]] | When charging the A1989 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!]] | ||
Revision as of 14:44, 14 October 2023
| MacBook Pro A1989 Charger not turning on USB-C meter repair | |
|---|---|
| Device | MacBook Pro A1989 |
| Affects part(s) | Motherboard |
| Needs equipment | multimeter, soldering iron, soldering station, thermal camera |
| Difficulty | ◉◉◉◌ Hard |
| Type | Soldering, Micro-Soldering"Micro-Soldering" is not in the list (Soldering, Teardown, Part replacement, Cleaning, Software, BGA, General) of allowed values for the "Repair Guide type" property. |
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Problem description
When charging the A1989 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.
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
- 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.
Shorted USB-C port
Replace the offending port.