SB-28 disassembled, what is this white wire?

Hello POTN,

I tried to find a nikon forum to post this in, but apparently nikonians requires you to pay a ridiculous membership fee in order to post or you are pretty much limited to what you can do.

Anyways, I have 3 sb-28's I have slowly disassembled for cleaning. Out of the three lights, one of them has a white wire soldered from the shoe to the main PCB board inside the flash.

Here is a picture explaining what I mean.

No matter what you do, do NOT snip that wire. Just stop what you're doing and slowly back off from it and clear the room. Then run like you're life depended on it.



Sorry, I have no idea what that wire's for.

No danger. White is Metrosexual!

I'm guessing it's replacing a cracked channel of the circuit board.

PhotosGuy wrote in post #4867541
No danger. White is Metrosexual!

I'm guessing it's replacing a cracked channel of the circuit board.

I have no idea what "metrosexual" means.
Do we need to move this thread to the GN forum?

I would guess you are not the original owner of all three units, otherwise you might know that the one in question went in for a repair.

I would agree with PhotosGuy what it is a jumper put in as a repair because either one of the traces or connecting cables is broken.

Try seeing where the start and finsh is of this white wire is on the other two units. It almost looks like the 2 boards are connected by a plastic multi-conductor cable, and maybe the connection at either end isn't making good contact, so the white wire is bypassing that trace. Disconnect it, and see if it still works (then reconnect it).

PacAce wrote in post #4867418
No matter what you do, do NOT snip that wire. Just stop what you're doing and slowly back off from it and clear the room. Then run like you're life depended on it.



Sorry, I have no idea what that wire's for.

ok im outside! what do i do now :P

jmb4370 wrote in post #4867876
I would guess you are not the original owner of all three units, otherwise you might know that the one in question went in for a repair.

I would agree with PhotosGuy what it is a jumper put in as a repair because either one of the traces or connecting cables is broken.

Try seeing where the start and finsh is of this white wire is on the other two units. It almost looks like the 2 boards are connected by a plastic multi-conductor cable, and maybe the connection at either end isn't making good contact, so the white wire is bypassing that trace. Disconnect it, and see if it still works (then reconnect it).

jmb, thanks, that was what i was thinking also. i will trace it when i have more spare time. however, as long as the flash works, i am happy.
i was just curious as to why one unit had it and the others didnt.

i guess its most logical that it was implemented to bypass one of the circuits on the multi conductor cable.

PhotosGuy wrote in post #4867541
I'm guessing it's replacing a cracked channel of the circuit board.

I'll go for the "intermittant opencircuit in the ribboncable"
either way, that's a repair.

is there traces of semtex?