I’m looking for MBP A1278 schematics

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I’m looking for MBP A1278 schematics

08-26-2022, 11:05 AM

Hi everyone, I'm looking for MBP A1278 schematics.
I have 2008 A1278 Macbook Pro with 2.4GHz C2D and Nvidia 9400M.
Motherboard EMC: 2254
I'm looking for schematics, because the Macbook doesn't work so I want to find and test the onewire circuit.
I couldn't find schematics for motherboard with same emc on this forum, if there is a thread with schematics for this motherboard that I overlooked, please reply with link.
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Looking for 13" Macbook Pro A1278 mid 2012 820-2565-A Schematics and Board View

by Rezendes

Hello, I am looking for any and all files related to the mainboard for 820-2565-A (13" Macbook Pro A1278 mid 2012) schematics/board view.

I looked through forum search results and google and was unable to find a board view file, I found a pdf of all the schematics but I don't know where the parts physically are on the board as this is my first macbook board level repair attempt.

The macbook charger has a green light, the battery has been replaced and OS reports Normal status but Not charging. After cleaning a corroded capacitor it crumbled off the board. There...
- Channel: Schematic Requests ONLY!
05-10-2024, 02:18 PM
Macbook A1278 (820-2936) No power. missing SMC_BC_ACOK

by Adogabriel100

Hey! This is a A1278 macbook 2011.

Problem: Not turning on / No green light

Im using by3200s charger.

Voltajes:

PPBUS_G3H = 12.26v

SMC_RESET_L = 3.3v
PP3V42_G3H = 3.42v

U7000 =

Pin 1 CHGR_AGATE = 0v
Pin 2 CHRG_DCIN = 19v
Pin 3 CHRG_ACIN = 4.6v
Pin 10 SMBUS_SMC_BSA_SDA = 3.3V
Pin 11 SMBUS_SMC_BSA_SCL = 3.3V
Pin 12 PP3V42_G3H = 3.42v
Pin 13 CHRG_RST_L = 3.3V
Pin 14 SMC_BC_ACOK = 0.8V
Pin 19 PP5V1_CHRG_VDD = 5.05V
Pin 20 PP5V1_CHRG_VDDP = 5.03V...
- Channel: Troubleshooting Laptops, Tablets, and Mobile Devices
04-01-2024, 01:02 PM
MacBook A1278 (3115) No PPBUS_G3H Issue

by pcbmaniac
Subject: Help Needed: MacBook A1278 (3115) No PPBUS_G3H Issue

Hello everyone,

I'm working on a MacBook A1278 with the 3115 logic board and facing an issue with no PPBUS_G3H voltage. Here's what I've checked so far:
1. U7000 Measurements:
  - Pin 3 has 0V, even though R7012 shows 16.5V from PPDCIN_S5_CHGR.
2. Resistors:
  - I measured R7010 and R7011 with one leg disconnected, and both tested OK.
Based on these findings, I believe U7000 needs to be replaced. However, I have a related question:
- If I also decide to replace the SMC, do I need to order it pre-programmed,
...
- Channel: Troubleshooting Laptops, Tablets, and Mobile Devices
12-02-2024, 04:12 PM
Apple MacBook A1278 051-7918 820-2327 Schematic

by Document Archive

Apple MacBook A1278 051-7918 820-2327 Schematic
M97A MLB Rev C...
- Channel: Schematics and Boardviews
11-01-2024, 06:53 AM
Apple MacBook Pro 13 A1278 i5 2.5GHz 820-3115-B Boardview

by Document Archive

Apple MacBook Pro 13 A1278 i5 2.5GHz 820-3115-B Boardview...
- Channel: Schematics and Boardviews
10-26-2024, 03:30 AM
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I’m looking for MBP A1278 schematics

I’m looking for MBP A1278 schematics

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