- Thread starter Damir Margetic
- Start date
Dutch Welder
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- 389
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- Oss, The Netherlands
Will have access to a genuine TR52 on Wednesday.
Oh, super!
I dubbelchecked the circuit and everything is connected like it should.
Whith the 10-pole connector unpluged I've measured the resistance between pole A (gnd) and pole F (mid-pin of potentiometer).
footpedal unpressed gives about 0 ohms
footpedal pressed around 1k7 ohms (because of the other resistors it is less than 2k5).
This in a linear way as the pedal is pressed.
It would be nice if you could measure that! @Dutch Welder
Hi Peter.
Between A and F on my RCT-F (TR-52 board):
Footpedal unpressed I have a high resistance, like 40-60 kOhms.
Then it drastically drops at the beginning, but alone it's not easy to measure.
Fully pressed, 1.7 to 1.9 kOhms.
Poti is 2.2 kOhms.
Here the inside (Hi-res photos on request):
Between A and F on my RCT-F (TR-52 board):
Footpedal unpressed I have a high resistance, like 40-60 kOhms.
Then it drastically drops at the beginning, but alone it's not easy to measure.
Fully pressed, 1.7 to 1.9 kOhms.
Poti is 2.2 kOhms.
Here the inside (Hi-res photos on request):
Thank you so much @Macfun !
I'm gonna check this circuit with what i've got.
although there is one thing that does cought my eye when checking the resistor values:
that is, the third resistor from the top, see images below:
when read from left to right it would give you a value of 2,12 mega ohms with an insane tolerance of 0,1%... this is not likely!
When read from left to right it gives 17,4 K ohms @ 1% tolerance, which is more likely to be truth.
However, in the previous circuitery this should be a 22,1 K ohm!
(the other values look the same: r2 = 56k
r1 & r4 = 1k9 or 1k8 wether the second ring is white or gray).
to be continued.
I'm gonna check this circuit with what i've got.
although there is one thing that does cought my eye when checking the resistor values:
that is, the third resistor from the top, see images below:
when read from left to right it would give you a value of 2,12 mega ohms with an insane tolerance of 0,1%... this is not likely!
When read from left to right it gives 17,4 K ohms @ 1% tolerance, which is more likely to be truth.
However, in the previous circuitery this should be a 22,1 K ohm!
(the other values look the same: r2 = 56k
r1 & r4 = 1k9 or 1k8 wether the second ring is white or gray).
to be continued.
Hello everyone.
I am Aitor from Barcelona and I recently got a Castotig 2002.
I have checked the 15 pages but I can't find what is wrong with my machine.
The machine turns on and the 7 LEDs on the top plate light up. The power resistors are in good condition.
The left side plate also has LEDs on when I put it in MMA.
When I put it in MMA there is no spark, in Tig mode there is a spark but no force to weld. Also to say that when I put it in MMA mode the transformer makes a frequency noise, I attach some images.
I hope you can help me.
Sorry for my bad English
I am Aitor from Barcelona and I recently got a Castotig 2002.
I have checked the 15 pages but I can't find what is wrong with my machine.
The machine turns on and the 7 LEDs on the top plate light up. The power resistors are in good condition.
The left side plate also has LEDs on when I put it in MMA.
When I put it in MMA there is no spark, in Tig mode there is a spark but no force to weld. Also to say that when I put it in MMA mode the transformer makes a frequency noise, I attach some images.
I hope you can help me.
Sorry for my bad English
Thanks Jan, Any photos to know which are the secondary diodes and where they are?
regards
Sorry, I already found them. Do you recommend changing all 4 or should I check them with the tester and change only the damaged ones?
Located there is one in short circuit
Jan-DIY
Member
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- Location
- Lower Saxony Germany
