Go Back   MacRumors Forums > Apple Hardware > Notebooks > MacBook Pro

Reply
 
Thread Tools Search this Thread Display Modes
Old Dec 8, 2012, 03:53 PM   #1151
rickAC
macrumors member
 
Join Date: May 2012
Quote:
Originally Posted by bosna1973 View Post
cmdrdata, thank you for your input.
Can you identify this component in red
If your model is A1278 K24 than the component in red is C3500 (pin 1: PP3V3_S3_CARDREADER_DVDD, pin 2: ground.
rickAC is offline   0 Reply With Quote
Old Dec 9, 2012, 08:55 AM   #1152
iN00b
macrumors newbie
 
Join Date: Dec 2012
Quote:
Originally Posted by Dadioh View Post
Pin 14 should be a solid 3.4V. If it is fluctuating or not reading 3.4V then the charger circuit is not happy. Most likely cause is the charger IC but you might want to check some of the circuits around the charger with schematic in hand and see if you can determine an issue. Sorry, can't provide a step by step for that because every issue could be different and this level of troubleshooting really requires someone with electronics knowledge.

----------

Welcome back Commander Data

Great to have you back on the thread.
I should pay more attention to what Im doing I have 3 chargers and 1 of them is for a macbook and the other ones are for MBP. When I tested the voltage with an MBP charger it was ok. I actually tested pins 2,3 and 14 and compared all of them to the voltages at a similar working board and they were all same so the charger circuit should be ok.
After looking the board more thoroughly I noticed that 2 pins of one component have corroded and there is no connection. The pins are the ones marked with green arrows at the attached image. I found the image from previous posts. Im guessing this might be my problem.
Does anyone know that what the component is exactly and is there a place where I could order these from?
Attached Images
 
iN00b is offline   0 Reply With Quote
Old Dec 9, 2012, 09:21 AM   #1153
Dadioh
Thread Starter
macrumors 65816
 
Dadioh's Avatar
 
Join Date: Feb 2010
Location: Canada Eh?
Quote:
Originally Posted by iN00b View Post
I should pay more attention to what Im doing I have 3 chargers and 1 of them is for a macbook and the other ones are for MBP. When I tested the voltage with an MBP charger it was ok. I actually tested pins 2,3 and 14 and compared all of them to the voltages at a similar working board and they were all same so the charger circuit should be ok.
After looking the board more thoroughly I noticed that 2 pins of one component have corroded and there is no connection. The pins are the ones marked with green arrows at the attached image. I found the image from previous posts. Im guessing this might be my problem.
Does anyone know that what the component is exactly and is there a place where I could order these from?
That is one of the inrush FETs. If yours is a 2009 MBP13 then the part is shown below. To be certain, check for the other FET on the back of the logic board near that one. If you can read the part number on that it will confirm.

http://avnetexpress.avnet.com/store/...storeId=500201
Attached Thumbnails
Click image for larger version

Name:	inrush FETS.jpeg
Views:	121
Size:	260.5 KB
ID:	382469  
__________________
Almost an embarrassing amount of Apple Gear
Dadioh is offline   0 Reply With Quote
Old Dec 9, 2012, 09:26 AM   #1154
Dadioh
Thread Starter
macrumors 65816
 
Dadioh's Avatar
 
Join Date: Feb 2010
Location: Canada Eh?
Quote:
Originally Posted by kennethf View Post
Hello
Great forum
Iam working on a water damaged macbook pro 13 2010 A1278 EMC:2351.
The mac charges the battery and G3hot is good. But it wont start Great if someone could help me out where to look.

Ps I think there something wrong with my 5V supply, where can I find this on the PCB ?

Thanks
The 5V and 3.3V device is identified in the attachment. See schematic for which pins to measure but you can measure them on capacitors coming off the power outputs rather than trying to get the probe on the device pins (risky for shorting).
Attached Thumbnails
Click image for larger version

Name:	5V_3.3V.jpeg
Views:	202
Size:	265.4 KB
ID:	382470  
__________________
Almost an embarrassing amount of Apple Gear
Dadioh is offline   0 Reply With Quote
Old Dec 9, 2012, 09:29 AM   #1155
Musicsoul78
macrumors regular
 
Join Date: Aug 2012
Location: UK ESSEX
Quote:
Originally Posted by Dadioh View Post
Although electrically the DC-in board is equivalent between the A1278 Pro and the earlier A1278 unibody non-PRO the 2 screw holes to mount to the chassis are slightly different spacing so you can't interchange them.
This is very true!!!
You can not swap them straight over but you can use it for testing purposes.
Musicsoul78 is offline   0 Reply With Quote
Old Dec 9, 2012, 10:47 AM   #1156
Dadioh
Thread Starter
macrumors 65816
 
Dadioh's Avatar
 
Join Date: Feb 2010
Location: Canada Eh?
Quote:
Originally Posted by Musicsoul78 View Post
This is very true!!!
You can not swap them straight over but you can use it for testing purposes.
Yes. For testing purposes that would work. I actually had a DC-in from an older Macbook White polycarbonate that I used for testing unibody logic boards. The pinout was the same.

A word of caution when using a DC-in board outside of the case. Wrap it with kapton tape so that it doesn't accidently move around and short something on your logic board. I learned the hard way when the cord yanked it into contact with the logic board I was working on and applied 16V where it should not have been applied. Poof. One dead logic board
__________________
Almost an embarrassing amount of Apple Gear
Dadioh is offline   0 Reply With Quote
Old Dec 9, 2012, 11:42 AM   #1157
iN00b
macrumors newbie
 
Join Date: Dec 2012
Quote:
Originally Posted by Dadioh View Post
That is one of the inrush FETs. If yours is a 2009 MBP13 then the part is shown below. To be certain, check for the other FET on the back of the logic board near that one. If you can read the part number on that it will confirm.

http://avnetexpress.avnet.com/store/...storeId=500201
Ok, thanks! And yes - the markings on top of the FETs say: 1127 so its the one. Now to get those, hope this works - fingers crossed
iN00b is offline   0 Reply With Quote
Old Dec 14, 2012, 10:01 AM   #1158
mm9
macrumors newbie
 
Join Date: Nov 2007
Question Macbook Pro Unibody 15 i7 2011 Help Wanted

Its a great topic. I have read most of it.


Could you please give me a hint on finding this silver square component marked RED from my mobo please?

logic board is apple 820-2915-b
Macbook Unibody 15 inches
i7 - probably 2011


chip is marked with

i "diode triangle symbol" R
9395
2984
1051


Thanks in advance

Mike




Last edited by mm9; Dec 14, 2012 at 11:14 AM. Reason: addon
mm9 is offline   0 Reply With Quote
Old Dec 14, 2012, 11:25 AM   #1159
mm9
macrumors newbie
 
Join Date: Nov 2007
Macbook Air Late 2010 - adding back-light to keyboard A1369

I have read many advanced instructions and info here.

Is there a chance that one of you have tried connecting back-light to the motherboard on a Late 2010 Macbook Air without this feature.

I have already added backlight but cant find a place to put a socket powering it. Micro controller should be able to support it but where to look for a spot?

Anyone willing to give it a go?

Best

Michael
mm9 is offline   0 Reply With Quote
Old Dec 14, 2012, 06:18 PM   #1160
cmdrdata
macrumors 6502
 
Join Date: Jun 2011
Location: Dallas, Texas, USA
Quote:
Originally Posted by mm9 View Post
Its a great topic. I have read most of it.


Could you please give me a hint on finding this silver square component marked RED from my mobo please?

logic board is apple 820-2915-b
Macbook Unibody 15 inches
i7 - probably 2011


chip is marked with

i "diode triangle symbol" R
9395
2984
1051


Thanks in advance

Mike
It is an isolation switch (power FET) made by International Rectifier. The part number is IRF9395. See attached.
Attached Thumbnails
Click image for larger version

Name:	Screen Shot 2012-12-14 at 5.16.00 PM.png
Views:	64
Size:	210.6 KB
ID:	383629  
__________________
MBPU13-MOUNTAINLION/Mid2009/500GB/8GB/WIN7
MBA11-MOUNTAINLION/Mid2010/128GB/4GB
TOYOTA SUPRA TwinTurbo-1994
cmdrdata is offline   2 Reply With Quote
Old Dec 15, 2012, 05:12 AM   #1161
mm9
macrumors newbie
 
Join Date: Nov 2007
Thumbs up Thank You

Quote:
Originally Posted by cmdrdata View Post
It is an isolation switch (power FET) made by International Rectifier. The part number is IRF9395. See attached.

Thanks!!!! Great You have made my day. All the best!!!
mm9 is offline   0 Reply With Quote
Old Dec 21, 2012, 02:44 AM   #1162
docentore
macrumors newbie
 
Join Date: Jun 2012
K6 after water damage

Hi all, great thread, great help can be found here. I need some help from you guys. I hav 13 MBPRO 2010 2.4 after water damage.
Most damage was done around U7000.
All cleaned etc. now what happens:
1. when battery is in and I connect magsafe - starts on its own
2. No magsafe but battery in - I can start either through power button or using smc bypass.

In both cases macbook gives me 1 beep - no memory, with the ram or without. RAM is 100%. Nothing on the screen

G3 is 3.39 (might my meter is a bit off)

Got some measurment from the U7000:
1 - 0v
2 - 15.9
3 - 3.8v
4 - 0
6 - 3.35
7 - 0
8 - 2
9 - 0.87
10 - 3.3
11 - 3.3
12 3.4
14 - 2
16 - 5
18 - 12.5
20 - 5
21 - 0.5
23 - 2.3
24 - 16.3
25 17.4
28 - 16.4

1.5v and 0.75v for memory is present, 1v for cpu and 5v for usb is there


Also what I noticed that I dont have 18.5 around U5805? IC was replace along with diode and choker - still no joy.

Last edited by docentore; Dec 21, 2012 at 06:17 AM.
docentore is offline   0 Reply With Quote
Old Dec 24, 2012, 07:40 PM   #1163
rickAC
macrumors member
 
Join Date: May 2012
Quote:
Originally Posted by rickAC View Post
Hi,

I have a MBP A1278 13". Evererything is functioning apart from three keys: Left Shift, Left Option and Control. I tried a casing with good working keyboard but it didn't help. The fault is on logic board, possibly SMC reset function since those three keys are used for it.


Anyone have success in repairing this fault?
Can it really be that only I have had this fault on this forum?
Not even you Dadioh and cmdrdata
rickAC is offline   0 Reply With Quote
Old Dec 25, 2012, 11:21 PM   #1164
mac-n-sauce
macrumors regular
 
Join Date: Jun 2012
Location: Tampa, Fl
Quote:
Originally Posted by bosna1973 View Post
cmdrdata, thank you for your input.
Can you identify this component in red
It's a capacitor:
C3500
10uf
20%
6.3v
x5r
603

Part of the card reader circuit
__________________
Gilbert Tyrrell
Wisdom = [Knowledge(Spirit)(Applied)]
mac-n-sauce is offline   0 Reply With Quote
Old Dec 26, 2012, 10:49 AM   #1165
cmdrdata
macrumors 6502
 
Join Date: Jun 2011
Location: Dallas, Texas, USA
Quote:
Originally Posted by rickAC View Post
Can it really be that only I have had this fault on this forum?
Not even you Dadioh and cmdrdata
here are the two sections you may want to probe around and compare good keyboard/logic board vs bad ones and see if they are different. I've never seen that kind of problem so, yes, you're on new ground(s). good luck.
Attached Thumbnails
Click image for larger version

Name:	keybrd chip.png
Views:	61
Size:	90.6 KB
ID:	385882   Click image for larger version

Name:	keybrd connector.png
Views:	110
Size:	64.4 KB
ID:	385883  
__________________
MBPU13-MOUNTAINLION/Mid2009/500GB/8GB/WIN7
MBA11-MOUNTAINLION/Mid2010/128GB/4GB
TOYOTA SUPRA TwinTurbo-1994
cmdrdata is offline   0 Reply With Quote
Old Dec 26, 2012, 02:25 PM   #1166
mac-n-sauce
macrumors regular
 
Join Date: Jun 2012
Location: Tampa, Fl
Quote:
Originally Posted by cmdrdata View Post
here are the two sections you may want to probe around and compare good keyboard/logic board vs bad ones and see if they are different. I've never seen that kind of problem so, yes, you're on new ground(s). good luck.
I have a 2010 13" macbook pro with a white screen. Boots and works externally. Looks like the LVDS connector was replaced. Bad replacement? The screen does not look damaged in any way, cable appears to be good. Tried unplug and reseat-no effect.

Any thoughts
__________________
Gilbert Tyrrell
Wisdom = [Knowledge(Spirit)(Applied)]
mac-n-sauce is offline   0 Reply With Quote
Old Dec 26, 2012, 03:25 PM   #1167
bosna1973
macrumors newbie
 
Join Date: Nov 2012
Can you help me identify this component in red,on one side there is 16.5but on the other side,0
Attached Thumbnails
Click image for larger version

Name:	2djywrs.jpg
Views:	116
Size:	531.8 KB
ID:	385940  
bosna1973 is offline   0 Reply With Quote
Old Dec 26, 2012, 03:29 PM   #1168
mac-n-sauce
macrumors regular
 
Join Date: Jun 2012
Location: Tampa, Fl
Quote:
Originally Posted by bosna1973 View Post
Can you help me identify this component in red,on one side there is 16.5but on the other side,0
What are the specs on the computer? Never mind. 2011 17" macbook pro i7
Looks like a capacitor, but hard to tell from the photo. I do not have the schematic for the 2011 17" maybe someone else out here does. Probably part of the dc-in magsafe circuit. Thats why its reading 16.5v on one side. Its located next to the fuse(the white one) for that circuit.
__________________
Gilbert Tyrrell
Wisdom = [Knowledge(Spirit)(Applied)]

Last edited by mac-n-sauce; Dec 26, 2012 at 03:39 PM.
mac-n-sauce is offline   0 Reply With Quote
Old Dec 26, 2012, 03:54 PM   #1169
bosna1973
macrumors newbie
 
Join Date: Nov 2012
It is a1286 mc118ll/a
bosna1973 is offline   0 Reply With Quote
Old Dec 26, 2012, 04:04 PM   #1170
mac-n-sauce
macrumors regular
 
Join Date: Jun 2012
Location: Tampa, Fl
Quote:
Originally Posted by bosna1973 View Post
It is a1286 mc118ll/a
That photo has a logic board number for a 2011 17" i7

Either way, that will still be a capacitor. What is the problem with the computer?
__________________
Gilbert Tyrrell
Wisdom = [Knowledge(Spirit)(Applied)]
mac-n-sauce is offline   0 Reply With Quote
Old Dec 26, 2012, 04:07 PM   #1171
bosna1973
macrumors newbie
 
Join Date: Nov 2012
An if lcd-screen is not functional should there be startup sound ,when I press power button I can hear DVD and hard drive spinnig I can see white light but nothing on the screen and no startup sound I try to remuve ram same no startup sound
bosna1973 is offline   0 Reply With Quote
Old Dec 26, 2012, 04:37 PM   #1172
mac-n-sauce
macrumors regular
 
Join Date: Jun 2012
Location: Tampa, Fl
Quote:
Originally Posted by bosna1973 View Post
An if lcd-screen is not functional should there be startup sound ,when I press power button I can hear DVD and hard drive spinnig I can see white light but nothing on the screen and no startup sound I try to remuve ram same no startup sound
That can be bad video, blown backlight, bad cable for the screen. Can you see anything in the screen if you shine a flashlight?

You should get start up chime if its booting. Does not sound like you are getting a boot.

The computer will try and go through the start up procedure by testing the HD and DVD. If you leave it on and it is booted you will be able to toggle the caps lock on and off. If not then you are not getting through the boot process
__________________
Gilbert Tyrrell
Wisdom = [Knowledge(Spirit)(Applied)]
mac-n-sauce is offline   0 Reply With Quote
Old Dec 27, 2012, 12:42 PM   #1173
bosna1973
macrumors newbie
 
Join Date: Nov 2012
There is nothing on screen when I use flashlight and backlight fuse is OK and you are right computer dosnot boot there is no light on keyboard.
bosna1973 is offline   0 Reply With Quote
Old Dec 27, 2012, 01:44 PM   #1174
Musicsoul78
macrumors regular
 
Join Date: Aug 2012
Location: UK ESSEX
Quote:
Originally Posted by rickAC View Post
Can it really be that only I have had this fault on this forum?
Not even you Dadioh and cmdrdata
try smc reset without the keybaord... keyboard removed

it involves you triping the gehot whilst adding or removing magasafe power (battery must be unplugged)

check the keybaord connector on logic board for debris or replace just to make sure!!!

also try external keybaord??

plus new internal keyboard

----------

MAC N SAUCE

Ok i had the same issue turned out to be cable !!

also had another one wich was the lvds connector on logic board, needed to be replaced.

please try a new screen before removing lvds connector.

----------

I have issue with MB A1278 Unibody logic board refurbished

when plugged dc in to dc-board i get flashing green light.

this giving intermittent shots of power and i do not know where to start.

please help

as i can not take any readings as they are constantly changing

ps

Tried 5 new dc in boards all same issue its defo logic board probably a fuse or capacitor???
__________________
Note to self Always Disconnect The Battery...
Musicsoul78 is offline   0 Reply With Quote
Old Dec 27, 2012, 02:46 PM   #1175
mac-n-sauce
macrumors regular
 
Join Date: Jun 2012
Location: Tampa, Fl
Quote:
Originally Posted by bosna1973 View Post
There is nothing on screen when I use flashlight and backlight fuse is OK and you are right computer dosnot boot there is no light on keyboard.
So now you have no boot issues. You have to start diagnosing why. You are getting power so the G3HOT sounds ok, Is there liquid damage on this board
__________________
Gilbert Tyrrell
Wisdom = [Knowledge(Spirit)(Applied)]
mac-n-sauce is offline   0 Reply With Quote

Reply
MacRumors Forums > Apple Hardware > Notebooks > MacBook Pro

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Similar Threads
thread Thread Starter Forum Replies Last Post
MaxOSX Tips Troubleshooting Guide Huntn Mac Basics and Help 1 Oct 11, 2013 10:52 AM
MacBook Air Hardware Troubleshooting Guide varungargi MacBook Air 0 Sep 17, 2013 02:39 AM
Mac OS X Tips Troubleshooting Guide Huntn OS X 2 Jun 18, 2013 03:18 PM
Early 2008 MBP with SMC issue? Need ideas/suggestions... seanmuth MacBook Pro 3 Oct 31, 2012 08:40 PM

Forum Jump

All times are GMT -5. The time now is 12:26 AM.

Mac Rumors | Mac | iPhone | iPhone Game Reviews | iPhone Apps

Mobile Version | Fixed | Fluid | Fluid HD
Copyright 2002-2013, MacRumors.com, LLC