Jaz the man
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- Bradford
No . Can’t see nothing moving in theIll check again now to see if it moves. Is this the small transformer? Where are the connections to it to check the resistance?
View attachment 396320
No . Can’t see nothing moving in theIll check again now to see if it moves. Is this the small transformer? Where are the connections to it to check the resistance?
View attachment 396320
Yes, that is the small transformer.Ill check again now to see if it moves. Is this the small transformer? Where are the connections to it to check the resistance?
You may find that Pin 5 is labelled as "B" on your board.With the mains plug on the bench….not connected to any supply…..Remove the wires that are attached to pins 1&5 on the circuit board….With your meter on the 20K Ohms range, measure the resistance between the two pins….
Report back your findings….
Will do soon mateWith the mains plug on the bench….not connected to any supply…..Remove the wires that are attached to pins 1&5 on the circuit board….With your meter on the 20K Ohms range, measure the resistance between the two pins….
Report back your findings….
From the pic could you please point out where these black wires is mateYes, that is the small transformer.
This earlier thread describes how the orange light in the On/Off switch is controlled by the thermal cutout:
If the cutout opens, the light is fed with mains via the primary of the small transformer. So that would be a simple way of confirming that the transformer primary is conducting - just disconnect either of the two black wires at the cutout ( mounted on the large aluminium fin of the rectifier ). Then plug the machine in and switch it on. If the orange light comes on, the transformer primary is OK. If the light remains off, the primary has burnt out.Clarke 90EN switch broken
Hi All, I am new to welding. I have been given a Clarke 90EN. My question is this the switch has 5 pins, (RED IN, / BLUE IN from the plug ) RED OUT, BLUE OUT to the circuit board. But a brown wire at the bottom of the switch goes to the circuit board (what is this wire please) the wire diagram...www.mig-welding.co.uk
I did that and the switch light comes on so that means the transformer primary is ok. So now what should I do mateThe rectifier is top centre in the photo, with two shiny aluminium cooling fins. The white plastic part screwed onto it is the thermal cutout, and joined to it are the two black wires. Pull either one of these off, move the end of the wire safely out of the way, then plug in & switch on the welder. These wires carry mains, so don't touch anything in that area when powered up.
If the orange light inside the switch comes on, the transformer primary ( 240v mains ) is OK. In that case, we would have to confirm that the transformer is producing the required low AC voltage ( 24v ) from the secondary coil. This low voltage runs the relay via the torch trigger switch.
If the light is out, the primary has burnt out ( a common fault ). A new transformer ( eBay, about 7 quid ) will have to be soldered onto the board.
So on my circuit I have numbers but they have a J in front. So J1, J2 etcI did that and the switch light comes on so that means the transformer primary is ok. So now what should I do mate
The numbers are very small and had to get the magnifier glass out to see themSo on my circuit I have numbers but they have a J in front. So J1, J2 etc
The J 1 has a blue wire to it on a spade connector and J2 is above it but the wires are not on a spade . There is a JB which is a black wire right below the main on / off switch
Will do that now mateHere is a photo of the type of board that you have:
To confirm with a meter that the primary resistance of the small transformer is OK, you need to remove the push-on tags on pins J1 ( blue wire ) and JB ( black wire ), then measure resistance from pins J1 to JB on the board, with power OFF !
Just done that with the 20k setting on volt meter. The meter showed 0.L on the display before connection and stayed the same when connecting the J1 and JB .What does that mean now?Here is a photo of the type of board that you have:
To confirm with a meter that the primary resistance of the small transformer is OK, you need to remove the push-on tags on pins J1 ( blue wire ) and JB ( black wire ), then measure resistance from pins J1 to JB on the board, with power OFF !
Here in Post #10 is a labelled drawing of the other side of the board, thanks to @mike 109444 :
Clarke 135 te - no wire feed
Afternoon all, I've been reading this forum for some time now picking up tips so firstly many thanks to all those that have heed without realisation over the years. I've however got to the point that where I can't find the answer and need to ask the question. My 135 was working fine until it...www.mig-welding.co.uk
Sorry , I meant J1 not J2 as indicated on the picThis is where I connected the meter wires to . J1 blue wire and JB black wire
View attachment 396348
Ok will do nowLooks like the primary is open circuit….
If you now replace the wires onto the terminals, with your meter switched to AC Volts ( on the highest range) measure the voltage at those two points, you should see 230-240V when you power up the welder from the mains….no need to press the trigger switch on the torch…