iMac 27" schematics + Boardview - 820-3478-A

[luvbe3]

main code : 820-3478-A
thanks you!

[piernov]

Re: iMac 27" Boardview Need - 820-3478-A

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[luvbe3]

Re: iMac 27" Boardview Need - 820-3478-A

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thanks you!

[avneeshshrotria]

Re: iMac 27" Boardview Need - 820-3478-A

can you please share the pdf schematics of this also ?

[piernov]

Re: iMac 27" Boardview Need - 820-3478-A

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[avneeshshrotria]

Re: iMac 27" schematics + Boardview - 820-3478-A

oh my god ! Thanks soooooooooo much ... @piernov !!!

By any chance would you have 820-4652-a iMac 27" boardview and schematics also ?

thanks again

[DunDrent]

Re: iMac 27" schematics + Boardview - 820-3478-A

Many thanks.

I used this BRD & PDF to compare to my 820-00292-A(2015 Imac 5K). Anyone has any suggestions to where to find BRD & PDF for 820-00292?

The 820-00292-A I have has a problem powering up. There are 4 LED's on the board, and the first LED(trickle power, 3V) should always be on when power is on the board. I have 12V power on the board and measured LED-1 which receives only 0.16V. I traced it back to

So it seems that Rail PP3V3_S5 receives only 0.16V.
The question is what's causing this?
There is no physical damage to the board at all.

My guess is that even though 820-3478-A is a 2013 Imac 27", the physical board is similar. The board view of the 820-3478-A for this particular circuit would hopefully be same or similar to 820-00292(a 2015 Imac).

Any help appreciated.
I'm a newby and understand I cannot start a thread yet.

Thanks,
DunDrent

[piernov]

Re: iMac 27" schematics + Boardview - 820-3478-A

I haven't seen 820-00292 schematics or boardview. 820-00291 is available, GPU area is different but the rest should be similar.

If you need help with troubleshooting, post in the "Troubleshooting Laptops, Portable, and Mobile Devices" section (not the "Schematic Requests ONLY!" subsection).

[pascable]

Re: iMac 27" Boardview Need - 820-3478-A

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Big THANK YOU

[levitor]

Re: iMac 27" schematics + Boardview - 820-3478-A

Hi

Did you solve 820-00292 problem?

i have same board with missed components.


I am looking for an equal motherboard to check the missing component. the board may be fine or I don't need to have the component reference.
thank you

[piernov]

Re: iMac 27" schematics + Boardview - 820-3478-A

Read post #8.

[marcelocruz]

Re: iMac 27" schematics + Boardview - 820-3478-A

thank you

[seosan]

Re: iMac 27" schematics + Boardview - 820-3478-A

Thank you !

[neper]

Re: iMac 27" schematics + Boardview - 820-3478-A

thank you

[NaserRock]

Re: iMac 27" schematics + Boardview - 820-3478-A

Thank you ��

[stiventyanez]

Re: iMac 27" schematics + Boardview - 820-3478-A

thank you,friends!!!

[0petter]

Re: iMac 27" schematics + Boardview - 820-3478-A

Muchas Gracias

[Rayskate]

Re: iMac 27" Boardview Need - 820-3478-A

I can't get this to open with openboard viewer, Thanks in advance

[matrix039]

Re: iMac 27" schematics + Boardview - 820-3478-A

thank you

[deserthermit]

Re: iMac 27" schematics + Boardview - 820-3478-A

thank you a lot