Chosen Solution
Hello i am trying to repair an Imac with lightning damage. The model number is A1224 which is a 20" screen model. unidentified chips circled in red I would like to identify the chips circled in red.
I suspect these chips are leabelled by FL9400, R9400 and R9410 on the PCB and may be related to that Delta ethernet transformer LFE9287. I have already found out that the other blown chips ‘0524P’ are diode arrays manufactured by Bourns part number CDDFN10-0524P. The overall location of these chips is just above + to the right of the right RAM slot see picture in step 9: iMac Intel 20" EMC 2266 Logic Board Replacement So far i think they might be some sort of common mode choke but i would love a link/part number so i can source replacements. It was lightning damage and i have tested PSU unsoldered mosfets, caps etc ad tested with multimeter and t is working to spec now i try to fix the motherboard. thanks in advance.
SAMZOR, from the schematic R9400 and R9410 are “No Stuff”. This means that they are not going to be assembled during the assembly. The reference designator is a location provided as a optional or feature specific needs demands. All your components look identical. They all seem to have 4 solder points which would make them not resistors. The bottom component looks like it split in half and flipped over. Hard to see on a picture. You may have to verify that closer. The components are all common mode filter chokes, FL9400, FL9401 and FL9402. All listed chokes are 12ohm TCM1210-4SM. You are correct about D9410 being a diode array. The original is a Semtech SLP2510P8, similar to the one you listed from Bourn but slightly higher values. Hope my added image makes sense.
