Help Me Please. My Weller Soldering Station Has Gone Off.

[keith777]

Hi guys i was wondering if any of you Guru's may know what has happened to my Weller Soldering Station. it just stopped working on me. i had been using it. then i turned it off for about 10 minutes. then when i went to switch it on again. nothing. no power light, display, nothing. has anyone any idea what the fault may be with it. i have had a bit of a look in side the casing, but i can not see anything burned out or anything like that. that i can see.
please don't tell me the ovuas that it is broken. lol
any help would be so much appreciated guys.............

[green]

Try plugging in a different outlet. Open box and measure if power is inside. If power, look for bad part, maybe fuse. Don't see bad part, start measuring.

[keith777]

Hi green.

i didn't see any type of fuse any ware inside the case. i couldn't here the transformer humming ether. the first thing that i did do. was to change the fuse in the 3 pin plug with a working one. wasn't the fuse as i also tried it in another electrical appliance and it worked fine.
i don't have much experience of testing components. so this is going to be a bit of a challenge for me. i can test for faulty wires ok, but when it comes to the PCB boards. that's a different matter.

[Carl-NC]

If you can, measure the inputs & outputs of the transformer directly. Be careful on the 220v side. The secondary should be 24v. If the input is OK and no output, then the transformer is toast. If the output is OK, then see if the 5V regulator output is OK.

[Polymer]

There must be a fuse somewhere inside the soldering station. It is given on the back label (T500mA) , T is german for Tr?ge - slow @100-300ms.

[Qiaozhi]

Go here and download the manual (Technical Reference WSD81) -> https://uk.rs-online.com/web/p/solde...tions/4310266/
It's in multiple languages, but English starts at page 13.
The interesting parts for you however are on the very last pages (70 and 71). Page 70 is the circuit diagram, and page 71 shows the location of the elusive fuse, which is located at the bottom of the mains socket.

[Carl-NC]

and page 71 shows the location of the elusive fuse, which is located at the bottom of the mains socket.

Post #3, he already tried that one. There is no other fuse inside the unit.

I happen to own the same model but it's at work, and I'm working from home.

[Qiaozhi]

Post #3, he already tried that one. There is no other fuse inside the unit.

I happen to own the same model but it's at work, and I'm working from home.

Possibly, but I think keith777 is located in the UK, and we have mains plugs with built-in fuses. If I read post #3 correctly, it was the fuse in the plug that he tested, not the one located in the mains socket. If he's not in the UK, then I've got that wrong.

[Carl-NC]

Oh, I didn't realize that. Yes, the IEC connector also has a fuse.

Edit: As Polymer says, it's a 1/2A slow-blow type.

[Polymer]

Possibly, but I think keith777 is located in the UK, and we have mains plugs with built-in fuses. If I read post #3 correctly, it was the fuse in the plug that he tested, not the one located in the mains socket. If he's not in the UK, then I've got that wrong.

I also thought that he checked the fuse inside the plug that goes into the mains socket in the wall. The UK and many other former Commonwealth countries have this feature.

[keith777]

i have just located the fuse socket at the back of the unit. just under wear the cable plugs in and it is blown. the fuse is a 250V 500MA
i will have a look to see if i have one laying about later tomorrow and test it out again........

[rickb]

It almost certainly popped for a reason. Look for a short circuit before replacing the fuse (or buy a bag of 100). The transformer primary resistance should be in the range of roughly 20 to 100 ohms. The secondary will be much lower. Beware, sometimes there is a thermal fuse inside the transformer.

[keith777]

sorry for late reply.
i managed to find 11 of them small glass fuses. the smallest amp one that i could find was a 1amp. well i thought what the heck and tried the soldering iron out with it anyways. Woo Hoo it's a live. i have left the soldering iron switch on for awhile and it seems to be fine.

[Andi68]

[Qiaozhi]

sorry for late reply.
i managed to find 11 of them small glass fuses. the smallest amp one that i could find was a 1amp. well i thought what the heck and tried the soldering iron out with it anyways. Woo Hoo it's a live. i have left the soldering iron switch on for awhile and it seems to be fine.