GORDAK 952 Rework soldering station problems

[VoicesFYC]

Re: GORDAK 952 Rework soldering station problems

Ok Ladies And Gents.. i own an original Gordak 952 i bought new off Ebay.

had it about a month and overheated the handle with not enough air and it melted and shorted the triac and a few caps and such on the board... so i had to take the unit apart to repair the board and replace the handle. i seen this post and grabbed the board i haven't installed as of yet (life things happening)

So THIS is "THE " Original Board" from a Gordak 952. the schematic on the new is as close as your gonna get... it helped me fix the board i have included 2 photos of my board for reference for anyone needing to identify components

Good Luck With Your repairs.

Daniel.
VoicesFYC.

[stj]

Re: GORDAK 952 Rework soldering station problems

not without pictures

[saminda]

Re: GORDAK 952 Rework soldering station problems

I bought a new model of this soldering / rework station. It has a different PCB layout. My heat gun is not heating up anymore and after having a look, microcontroller pin 5 is shorting to ground.

Is there a way to know which microcontroller is used in the system and if possible back up the firmware?

[hardwareman25]

Re: GORDAK 952 Rework soldering station problems

hey send me image from inside view of the circuit .. I mean components view.

[stj]

Re: GORDAK 952 Rework soldering station problems

you could probably use a single 10k 5w or 7w resistor if you can safely mount it.

[SuperAman]

Re: GORDAK 952 Rework soldering station problems

they got hot because they are under-rated and too close to the board.
if it was mine i would buy larger resistors and put them on ceramic spacers so air can pass around them.

Ok thanks. I can't find 18k ohms here so can I use 25K ohms 2watt or 3watt resistors? Also can I use the rectangular 3watt resistors?

[stj]

Re: GORDAK 952 Rework soldering station problems

they got hot because they are under-rated and too close to the board.
if it was mine i would buy larger resistors and put them on ceramic spacers so air can pass around them.

[SuperAman]

Re: GORDAK 952 Rework soldering station problems

i wonder why they died?
maybe c11 is bad and they got unsmoothed power!

I will check it. Also the burned area of the board around the 2 18k resistors, could it have gotten burned because we elongated the hose? The standard hose is very short around 70cm and my friend had made it longer by using another hose from a failed Gordak? Or is it because R35 or R36 one of them is 52K and other is 56.6K they are both supposed to be 51K +-5% ? Also the 18K resistors I could not find locally, even used ones from other technicians' junk pile. How many watts are they? When I measure them they are working and measure 18.46K and 18.5K even though their cover has burned off .

[stj]

Re: GORDAK 952 Rework soldering station problems

i wonder why they died?
maybe c11 is bad and they got unsmoothed power!

[SuperAman]

Re: GORDAK 952 Rework soldering station problems

I replaced both T5 & T6 both are 12v voltage regulator transistors and it is working as before.

[SuperAman]

Re: GORDAK 952 Rework soldering station problems

I was able to borrow the exact model soldering station that works and I tested it. With my friends board inserted into my Gordak, it started up fine and when I put my board in his the same problem shows up. So the problem is with my board, I will have to take readings of both to determine what the fault is with my board.

[SuperAman]

Re: GORDAK 952 Rework soldering station problems

because of the heat, it may just need some resoldering

I will check for cold solder joints. I will try to replace the hose and nozzle assembly with a new one to determine if this is problem with the board or hose. I will also change the pump from another device incase the heating element has gone bad but I doubt that. I really want to fix this because this model is the original 2 board Gordak and is more than 10 years old hasn't been used at all maybe a couple times a week. The new ones are so much lighter and have only 1 board inside, and they are crap, they fail within 6 months to a year of normal usage like 5-10 mins a day.

[stj]

Re: GORDAK 952 Rework soldering station problems

because of the heat, it may just need some resoldering

[SuperAman]

Re: GORDAK 952 Rework soldering station problems

I've removed and measured the two burned resistors R39 & R40 and they are measuring 18.54 - 18.58K ohms. Says on schematic they should be 18K so I assume they are fine. I suspect it might be one of the 5 big transistors T4 specifically.

[SuperAman]

Re: GORDAK 952 Rework soldering station problems

o.k. they are across the green wires - so where do they go??
btw, desolder the resistors and meter them - they may still be good.
and resolder the 3pin thing on the right that shows signs of getting hot.

Sorry for late reply, with COVID and all there hasn't been much work and I didn't need the rework for a while. It has now stopped working. I noticed before it stopped working that the lights would come on for a split second and turn off when I plug it in, even though the switches are off. Then after a couple of days of that for some reason the light would be on all the time even though the unit was powered off, but plugged in. Now when I turn it on, the temperature shoots up to like 300°C and instantly shoots back down to 000°C and remains there. No heat comes out, only cold air. I believe these devices have a resistor in the nozzle head, the hose might have gone bad?

[stj]

Re: GORDAK 952 Rework soldering station problems

o.k. they are across the green wires - so where do they go??
btw, desolder the resistors and meter them - they may still be good.
and resolder the 3pin thing on the right that shows signs of getting hot.

[SuperAman]

Re: GORDAK 952 Rework soldering station problems

you should get a picture of the underside so we can see the tracks to be sure what they actually connect with.
and follow those green wires to see what they do.

[stj]

Re: GORDAK 952 Rework soldering station problems

you should get a picture of the underside so we can see the tracks to be sure what they actually connect with.
and follow those green wires to see what they do.

[SuperAman]

Re: GORDAK 952 Rework soldering station problems

OP must have had the pump on full blast, for a long time then? It must be, I have seen 15k-18k 3W there. A 18k dissipates 3.2W at 240VAC.

So I should replace with 2 18K resistors of similar type?

[stj]

Re: GORDAK 952 Rework soldering station problems

but in parallel to the pump?
what function unless it's to provide a non-inductive load for the triac?