Zero Resistance resistor ?

[selldoor]

Hi Just starting my next project and have spotted a resistor which
has been dislodged at one end ( I didnt do it! - as we all say)

I dont think it is likely to be relevant to the overall problem but I would like
to get it sorted first, just in case.

Please see the Pic -quality not brilliant- poor light quality at this time of year and flash obliterates it completely.

It appears to have a Square Zero on it which I believe means it is a Zero Resistance Resistor.
Can anyone confirm that? and if so can I just replace it with a wire link?
A wire would be a lot easier to solder and I am less likely to cause more damage.

[Mad_Professor]

Re: Zero Resistance resistor ?

Hi Just starting my next project and have spotted a resistor which
has been dislodged at one end ( I didnt do it! - as we all say)

I dont think it is likely to be relevant to the overall problem but I would like
to get it sorted first, just in case.

Please see the Pic -quality not brilliant- poor light quality at this time of year and flash obliterates it completely.

It appears to have a Square Zero on it which I believe means it is a Zero Resistance Resistor.
Can anyone confirm that? and if so can I just replace it with a wire link?
A wire would be a lot easier to solder and I am less likely to cause more damage.

Never seen a square zero before.

usually zero means zero ohm jumper.

If I was you I would just heat the other pad and realign it and then let it cool and add solder to the unsolder end.
It just seems easier to me.

[joshnz]

Re: Zero Resistance resistor ?

It looks like there has been a high current thought that looks burned?
yes the is a zero Ω

[999999999]

Re: Zero Resistance resistor ?

No do not replace with a wire link. It could be acting as a mere jumper but 0 ohm resistors are often used as a form of cheap fuse. Given its dislodged state it is likely the fault caused an overcurrent condition which burnt the area and melted the solder joints (hard to tell exactly from the picture, with no info for all we know another person could have taken a soldering iron to it already) and if possible you should find the fault before applying power to the circuit as it "might" prevent further damage to do so.

I now wonder why you didn't mention what this board is and what the problem is.

[selldoor]

Re: Zero Resistance resistor ?

I now wonder why you didn't mention what this board is and what the problem is.

Hi- No fooling you is there-however I am an international espionage agent and if I were to tell you what the board is I would have to kill you!!!

Well no not quite- basically its a preliminery enquiry re a poor quality LCD tv (ASTV-3619WS) main board.
It works fine as a tv with a set top box, dvd player and as a PC monitor and has only one fault. The screen refresh rate is abysmal. (Not poor- abysmal!!!) on all imputs.
I am putting together a post to go in the Tv Troubleshooting forum but having been a follower for some time did not want to go off at half cock and also have a number of other time and space consuming projects on the go. I have worked on a few monitors and small lcds with some success but this one frightened me a bit. The power board is fine usual sort of thing but the main board has over 40 electrolytic caps some are Capcon as against Capxon some have logo R.M and some have u u neither of which I have found much about and others which only have a tiny logo that I have not yet deciphered.All in all a crap bunch of caps. Yet none of them are bulged or leaking.
In the hope that I could get it working without an initial recap I have been following two current threads on a similar problem and will try some of the ideas therein before posting. I am also having difficulty with photos.
Came to me as faulty - no history. First problem was the switch board had its socket half ripped off so it would not switch on- may have been me- who knows but its a flimsy affair which I have now replaced and managed to reconnect to the trace. I set off to try an overall photo and spotted the askew resistor. Probably would not have but there are two close together and one looked like a square and the other like a diamond which stuck out like a sore thumb- had they not been marked I dont think Id have spotted it.
I looked up zero resistor on web and Wiki said they were sometimes used instead of a wire link so they could be placed mechanically along with SM Caps and other components.

So there you have it - no real subterfuge just needed to know what I asked.
I have since looked up Zero Resistors as a fuse and you are correct - thanks.
I will get 100 soon (less than US$1) and try and replace it. - The area is not burned but it will be when ive finished with it! its just the picture- Bearing in mind how poorly made these sets are, its probably never been soldered correctly. Next step is to try reseating the tcon cable. I'll try all the simple stuff then post.

[999999999]

Re: Zero Resistance resistor ?

Though I can't tell for certain from the picture, it does not look like the resistor is jumpering over anything on the PCB, that there would be no reason to have a break in the trace there to add a wire or resistor instead of a continuous trace unless it were acting as a fuse. Once you get that resistor off you can better see if there is a trace or pad there requiring a jump from two pads across it.