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FORUMS Canon Cameras, Lenses & Accessories Canon EOS Digital Cameras
Thread started 06 Feb 2018 (Tuesday) 04:51
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Canon EOS 7D Power board CG2-2538

 
johny55
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Netherlands
Feb 06, 2018 04:51 |  #1

I wunder if anybody on this forum can help me to identify 2 components on this board.

I did my first hot air soldering, and 2 smd's went airborne..........:-) , and i have no idea where they landed.

On the photo i drew a red circel around them, and numbered them 1 and 2

It would be a great help for me is somebody can tell me what sort of smd's it are and what the value is.

Marti

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rajismine
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Joined Jun 2011
Post has been last edited 17 days ago by rajismine. 2 edits done in total.
Feb 06, 2018 05:00 |  #2

Guess the correct part number is PART CG2-2625-000 and a new one is about $66
https://www.aliexpress​.com ...d-For-Ca/32226751575.html (external link)

Its almost impossible to find the part detail since Canon never publishes it. Its much easier to find the smd fuse (P, K) and that does not seem to be the case here. You are better off getting a new part IMHO
regards
Rajeev




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johny55
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Feb 06, 2018 05:03 as a reply to rajismine's post |  #3

Thanks for your fast reply, but i would first like to repair the pcb and if that fails buy a new one. I am not repairing for commercial use, but just a hobby, so (working) hours don't matter.




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rajismine
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Joined Jun 2011
Post has been last edited 17 days ago by rajismine. 3 edits done in total.
Feb 06, 2018 05:21 as a reply to johny55's post |  #4

In that case it would be better to try a dead DCDC board for spares from any similar models or a 7D itself, and then take the smd out. This one seems like a capacitor and any small value should be good for testing
https://commons.wikime​dia.org/wiki/File:SMD_​capacitor.jpg (external link)

As far as i know, the OEM for most of these is Littlefuse (http://www.littelfuse.​com/ (external link))




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Ramon-uk
Senior Member
Joined Mar 2006
Post has been edited 17 days ago by Ramon-uk.
Feb 06, 2018 05:21 |  #5

The white ones are capacitors and the black ones with writing on are resistors, it is difficult to tell from your picture but these 2 look like capacitors. You could measure the value of similar sized ones on the board or do it by trial and error, I would suggest a starting value of about 100nf. It is quite possible that the board will work without them if they are just capacitors put there to reduce electronic noise.

Resoldering small components with a hot air blower is not a good idea, but I guess you have found that out.




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johny55
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Feb 06, 2018 05:25 as a reply to rajismine's post |  #6

Yes, you are right. If someone can tell me what it is, i can solder new ones on it, because i do have a box with different smd's.
The value of the smd might be printed on the sma, something like 102 meaning 1.000
But a broken print would also be ok.




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johny55
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Post has been edited 16 days ago by johny55.
Feb 06, 2018 05:31 as a reply to Ramon-uk's post |  #7

Heheheh...it was my first try hot air soldering....i replaced the IC, and instad of heathing it up, and pick it, i moved it over the board and then smd came from their soldering point, and then got 'airborn'.
i can laugh about my own stupidty, because i should have known. But....the one who never tries will never make mistakes.

BTW... we chatted before about my Canon 100-400......this was the camera i bought.
It has the same dirt in it as the lens, but not as much. I have no idea what they did. Maybe stored both in a damp closet.




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rajismine
Member
Joined Jun 2011
Post has been edited 17 days ago by rajismine.
Feb 06, 2018 05:33 as a reply to johny55's post |  #8

I dont think canon writes part numbers on these things..not even in their technical service manuals

UPDATE: Got to this from some wild internet search..I am not sure but can help may be:
https://www.mouser.com ...=rKqJIm0tnYF8kx9BJ1​gVOg== (external link)

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Canon EOS 7D Power board CG2-2538
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