Question about Weller D550 Soldering Gun

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Weller soldering gun schematics - Weller D550 Soldering Gun

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Posted on Jan 02, 2017

bulldogchief
  • 388 Answers

SOURCE: Weller 8200 100/140W replacement light bulb?

The bulb's part number is 7333. You can order a replacement bulb here for about $2.50 :http://www.e-sonic.com/aboutus/cat/S/soldering%206.pdf

Posted on Sep 14, 2009

Testimonial: "Thank you. Bulb voltage is actually whay I was looking for but I did not specifically ask for this.:-) Perhaps a 7333 bulb is a universal #."

  • 81 Answers

SOURCE: MY WELLER SOLDERING GUN IS GETTING HOT AND A

these are not worth repairing as the main part of a soldering iron is the transformer which is what causes the tip to get so hot, so if yours is giving off smoke and excessive heat probably the transformer is starting to cook itself which means it has to be replaced. I would guess that the transformer will cost you more then a replacement soldering gun on ebay would cost. Hope This Helps Don

Posted on Dec 08, 2009

  • 1244 Answers

SOURCE: weller soldering gun replacement light bulbs

that takes a common 6volt screw in type bulb you can buy at most radio shacks or parts stores

Posted on Jan 22, 2010

kb8dns
  • 494 Answers

SOURCE: TRYING TO GET SOMEONE TO REPAIR A WELLER SOLDERING GUN

Try tightening the screws that hold the copper element, light corrsion can develop and make a resistance.This can cause the gun to over heat.

Posted on Feb 14, 2010

  • 518 Answers

SOURCE: Need to download a manual for the Weller universal

just type in weller 8200 sol gun in search and it will go there

Posted on Jul 05, 2010

Testimonial: "After many futile tries on my web browser, your recommended web address contained the answer I was looking for. Thanks alot."

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1 Answer

I have an old Weller soldering iron model 8250a that I would like to repair. It has burnt up wiring, and I'd like to find a wiring circuit diagram, schematic or ANY kind of electrical drawing, comple



These were very simple and sturdy soldering guns [I still have 5 or 6 of them in various sizes] They basically have a transformer wired so that the heating part is basically a short circuit of the large low voltage secondary winding [very low voltage] and because the tip is higher resistance than the rest of the heat producing end, it gets hotter sooner. The secondary is just a single loop of the tube that holds the tip. Usually the only maintenance is to loosen and re-tighten the tip mounting nuts so that there is a good electrical connection [no connection = no heat; poor connection = poor heat]
There may be another small secondary winding that provides power to the light but I think the older ones just attached the lighting wires to the large secondary.
The primary [line voltage] winding of the transformer is switched such that the higher wattage powers the lesser resistance part of the winding and the lower wattage powers the higher resistance part of the same winding. In other words there is a single wire for the primary that has a tap near one end of the winding for dual heat.
If the two windings to the switch are mixed up the higher heat will just be at a different trigger position; if you don't like it, switch them around.

Also check the connection to the non-switched wire from the cord for a good connection. The switches are still available, at least for the newer models; do a google search for
Weller soldering gun switch
or
Weller 7324
25409080-sdtuz4uzlvmm4ye1kcvubb3h-1-0.jpg
Untitled Document [for a switch supplier]

Weller Switch Dual Heat Gun 1 Each 7324

Feb 10, 2015 | Weller Welding Tools

1 Answer

Is the weller 8200 comparable to the "Old Weller


Hello, your Weller 8200 soldering gun is rated at 140 or 160/100 watts. While the junior was about 70 watts. Go to this web site for parts: www.e-sonic.com/aboutus/cat/S/soldering%206.pdf GB...stewbison

Apr 23, 2011 | Weller Welding Tools

2 Answers

Need to know where I can get tips for a 8200 gun.


Sears Hardware carries Weller and and has tips for the 8200 Weller Soldering Gun, I just swa them yesterday at Sears Hardware.

May 21, 2010 | Weller 8200 Soldering Gun

1 Answer

My weller wsd130 solder won't work.


Try tightening the screws that hold the copper element, light corrsion can develop and make a resistance.

Feb 04, 2010 | Weller 8200 Soldering Gun

2 Answers

Weller soldering gun replacement light bulbs


that takes a common 6volt screw in type bulb you can buy at most radio shacks or parts stores

Jan 22, 2010 | Weller 8200 Soldering Gun

1 Answer

TRYING TO GET SOMEONE TO REPAIR A WELLER SOLDERING GUN


Try tightening the screws that hold the copper element, light corrsion can develop and make a resistance.This can cause the gun to over heat.

Dec 09, 2009 | Weller Welding Tools

1 Answer

During a very extended "on" cycle,there was a a loud snap with flash. Gun is inop now, and upon disassembly I found what appears to be a fusible link that had been burnt away. Any hints as to where to...


I wonder if you can still find a replacement heater coil for your old Weller D550 soldering Gun. The coil is just
in series connection. One end is connected to the line
of the power cord. The other end is to be connected to
the trigger switch in series with the other end of the
cord. Hope that help you. Send an email to let us know
and the your vote for the solution.

Sep 27, 2009 | Weller D550 Soldering Gun

1 Answer

Weller 8200 100/140W replacement light bulb?


The bulb's part number is 7333. You can order a replacement bulb here for about $2.50 :http://www.e-sonic.com/aboutus/cat/S/soldering%206.pdf

Sep 14, 2009 | Weller 8200 Soldering Gun

1 Answer

Weller model 550PK heavy-duty soldering gun is slow to heat up


It depends on what you say is slow, I have used weller soldering guns and desoldering guns for about 30 years. They come up to top heat in about 3min. If it is taking longer than that then there is a problem with the heating unit. You can call weller tech help number, should be on iron base and they can tell you how to test the heat unit.

Mar 24, 2009 | Weller D550PK Professional Soldering Gun...

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