Login Join Maker Pro
Or sign in with

# Anyone know what this is? Bullet shaped resistor?

#### Crash85

Feb 18, 2014
5
Attached is a picture of some sort of resistor or something. I have never seen it before, and it looks like it may have gotten hot. It inserts into lugs in the circuit board and then the wires are bent out. It doesnt get soldered in for some reason.

#### (*steve*)

##### ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd
Moderator
Jan 21, 2010
25,505
I was considering deg C but thought that's pretty damn hot

Not for these devices. A quick search says they range from as low as 66 degrees C to as high as 240 degrees C.

72F is rather lower than you'd expect as these fail open, never to close again and 72F is room temperature. If you bought any of them you'd have to get them delivered by refrigerated transport!

The holding temperatures are lower, but that's a different issue.

'72' on the part number could refer to a temperature or it might not... Assuming it does, it's probably in C but may still describe the holding or the breaking temperature. I expect the breaking temperature is more likely (and will also fail safely if you get it wrong).

So it may be one of these

#### (*steve*)

##### ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd
Moderator
Jan 21, 2010
25,505
unfortunately there is continuity across the cut-off.

Then it hasn't failed... Guaranteed.

Watch out if you need to solder it back into place. You MUST take precautions that heat from the soldering iron doesn't cause it to fail.

#### Crash85

Feb 18, 2014
5
it wasn't soldered into place. It just inserted through two lugs in the board and then you bend the wires out to snug it down. I went ahead and ordered a new one for peace of mind.

Will a 2 wire fan that has failed be able to trigger a safe mode in a device? Or would it need to be a three wire fan?

I remember having a tv once that wouldn't turn on because it had a dead fan. It was a 5 dollar part, and as soon as I swapped it, it worked like a champ again, but I was thinking it was a three wire fan.

#### (*steve*)

##### ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd
Moderator
Jan 21, 2010
25,505
it wasn't soldered into place. It just inserted through two lugs in the board and then you bend the wires out to snug it down. I went ahead and ordered a new one for peace of mind.

It's a bit like replacing tyres on your car because someone told you they could go flat, but suit yourself.

Will a 2 wire fan that has failed be able to trigger a safe mode in a device?

Unlikely, but not impossible

Or would it need to be a three wire fan?

Anything is possible

I remember having a tv once that wouldn't turn on because it had a dead fan. It was a 5 dollar part, and as soon as I swapped it, it worked like a champ again, but I was thinking it was a three wire fan.

Same problem, you're thinking about what you've seen or heard of happening elsewhere and ignoring (or not looking for) evidence in the failed device.

#### Crash85

Feb 18, 2014
5
the only evidence to be found in the failed device at my skill level is a slightly burnt thermal fuse and a failed fan. I'll spend the 98 cents on a fuse when the only other option the manufacturer has given us is to buy a new \$8000 camera.

Im definitely open to any resources that can repair CCD cameras

Replies
2
Views
106
Replies
0
Views
253
Replies
3
Views
834
Replies
6
Views
1K
Replies
3
Views
799