Macbook A1297 Mid2010 820-2361a Magsafe schematic?

[shivahoj]

Hello, the Magsafe connector of the above Macbook was defective(burnt pins). It is located on a small DC-IN board labeled 820-2361a sitting in the top right corner of the macbook, connected to the main PCB with 5 separate cables.
While replacing the magsafe, I must have unsoldered and lost a small SMD Resistor that is silkscreen-labeled R1 on the solder side(opposite of the magsafe and ferrite filter). It carries the 1bit-bus to the Amber/green LED driver chip in the Magsafe plug, and without connection to the 1-bit chip in the plug, the macbook won't charge.
¿Can anyone please provide the schematic or measure this resistor on a disconnected DC-IN board? the value might be quite low, but I am hesitant to short-circuit it.
¡Thanks a lot!

[piernov]

Re: Macbook A1297 Mid2010 820-2361a Magsafe schematic?

22 ohms on 820-2565, should be the same on yours.
No schematics for these available as far as I know.

[karmele]

Re: Macbook A1297 Mid2010 820-2361a Magsafe schematic?

22 ohms on 820-2565, should be the same on yours.
No schematics for these available as far as I know.

Hi, by your reply I see that you have the 820-2565 board. Please I need some info about the value of two of the capacitors on it. As you can observe there are three capacitors, I need the value of the bigger one and the one on the middle.
Can you help?
Thanks.
K.

[karmele]

Re: Macbook A1297 Mid2010 820-2361a Magsafe schematic?

I thought Piernov had the data I need but since he does not answer I assume I was wrong.
Please, anyone has an answer for me? I need the info ASAP.
Thanks.

I POSTED A PICTURE:
https://www.badcaps.net/forum/album....265&pictureids[]=903

[piernov]

Re: Macbook A1297 Mid2010 820-2361a Magsafe schematic?

Caps cannot be measured in circuit and it's not possible to measure their voltage rating anyway.
You can look at a MacBook Air LIO board schematics to have an idea what it might be, for example 820-2869.
You have to attach the picture to your post.

[karmele]

Re: Macbook A1297 Mid2010 820-2361a Magsafe schematic?

Caps cannot be measured in circuit and it's not possible to measure their voltage rating anyway.
You can look at a MacBook Air LIO board schematics to have an idea what it might be, for example 820-2869.
You have to attach the picture to your post.

Thanks for your reply. I thought you had a 820-2565 board unmounted, tha is why I asked you about it. I apolagize.
I tried to locate the board you mentioned but so far no luck, I"ll keep looking.
Thanks anyway.
Best regards.
K