Need to identify PoE related parts on pcb

[workbench82]

Hello all!

I have a chinese bullet IP camera (model IPC-V8253F-EI) which has been struck by lightning through ethernet cable. It seems that the PoE part has got some damage because with regular 12v power supply it still works normally.

I think this part in the uploaded image is the PoE part but I have no luck identifying the components.

The parts I would like to know are: Z2 & Z3 (P821 4ACNS ?), Z4 (white, looks like a fuse), TVS1 (P352 5BGG ?).
Also if you have an idea about U1, U2 and U9 (the two similar components), I would be grateful!

Thank you in advance for all help! Best regards, Arto

 

[Robert_fay]

Found the U9 appears to be a EL3H7 Opto Isolator
https://www.digikey.com/product-det...tronics-co-ltd/EL3H7-A-G/1080-1504-ND/2692943
Not much luck on the others.

 

[Robert_fay]

For the TVS the marking is a King Bright. I had a similar one that was crossed to a littelfuse part. Using the same marking code of BGG this would cross to a littelfue bidirectional TVS SMCJ58CA you could check the size to see if that is the same as your part. King bright seems to follow the same markings as Littelfuse though.
https://www.digikey.com/product-detail/en/littelfuse-inc/SMCJ58CA/SMCJ58CALFCT-ND/762629

 

[workbench82]

Thank you for these previous tips! I have now replaced parts TVS1 and U9 but it is still not working with PoE. I managed to follow the ethernet line to PCB and now I think the main problem might lure on other card. Here is the picture of it:


I'm interested on upper right part of pcb. The longest connector on right side has ethernet pins (the first six from top) and the first component there is HST-0041SAR. Any clues could it be damaged by surge?

Br, Arto