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SX-1010 won't Power On...

D.E.K said:
I think I will be more comfortable with something like this:

http://www.thesource.ca/estore/Prod...line&category=Soldering+Tools&product=6412102

The desoldering iron with bulb looks pretty bulky.
Click to expand...

yes, but you only have to get one tip in there and the iron is hard on the second (plastic) pump tip, and a metal pump tip is more of a pattern lifting hazard.

Your dominant hand will be firmly holding the iron and the other will be releasing the bulb, an inherently stable situation.

There IS the matter of recoil when you hit the trigger. as an old soldapult guy, that was the usual mode of damage when I had damage.


nitey nite....
 
I just use a simple desoldering bulb. Cheapest but I can do fast with it compared to trigger type. Despite of being happy with the bulb, I don't suggest it to anyone. It does have it downside. As Mark stated that the trigger is more stable to use compared to the bulb. And it clogs alot. I still love using the bulb.

The desoldering iron that you listed first. I used one like that before except it came from Radio Shack 25 years ago. It is easy one hand operation. Easier when you can hold the circuit board while using the iron on the pad to desolder. Hmmmmm :scratch2: I didn't think of that before I just said it. :D I gotta look into it.
 
markthefixer said:
www.mouser.com

534-4662 to-3 mica insulator $0.16 each (get 8)

532-249 1 oz thermal compound $4.71
or
532-250 2 oz thermal compound $6.45

863-MJ21193G pnp to-3 250v 16A 250W 4mhz 8-75hfe $3.83 for 2sAxxxx or 2sBxxxx transistors
863-MJ21194G npn to-3 250v 16A 250W 4mhz 8-75hfe $3.83 for 2sCxxxx or 2sDxxxx transistors
(the 1010 lists several different parts numbers for them)
Click to expand...

512-KSA910YSHTA $0.07 ea

The only question is with the thermal compound, if it is 1 ounce of weight, or 1 fluid ounce, a huge difference. If it is 1 ounce weight,it should be enough for 8 transistors, if it is one fluid ounce it will be maybe three times the volume - and the catalog isn't helpful in figuring out the difference....
 
I will contact them and ask what it really is. Meanwhile I got the desoldering pump. I decided to go with that rather than the bulb. Tomorrow or tonight, I will take something apart and try to take out a few components from the circuit board and see how it goes. I won't use the crt monitor though because of shock hazard. I'll probably destroy an old, non-working piece of junk 8 track player or something. I will submit the pictures all the same.
 
markthefixer said:
512-KSA910YSHTA $0.07 ea

The only question is with the thermal compound, if it is 1 ounce of weight, or 1 fluid ounce, a huge difference. If it is 1 ounce weight,it should be enough for 8 transistors, if it is one fluid ounce it will be maybe three times the volume - and the catalog isn't helpful in figuring out the difference....
Click to expand...

So far it is $80 plus shipping. I am hoping to get away with that much. IF you call that "getting away"
 
Here's my Practice Board. Where to begin I wonder. I guess start with the bigger components which have bigger joints.
 
I tried to take out a few transistors. Some good some bad. But everytime there seems to be a ring of solder left around. Or a little bit of solder residue left on the pins. I can't leave the hot iron on the surface for too long, it damages the circuit board. As soon as I remove the iron and use the pump, it is too late and the solder cools off. Any suggestions?
 
I would squeeze and hold the bulb, then touch the tip to the joint, and once the solder melts, release the bulb.

Two handed job, whether it's a separate tool, or part of the iron... that's part of the reason I got the station, it has a foot pedal.
 
I don't have a bulb. I have the pump. I guess I will practice or try the bulb. I don't think that one shot short suction is enough. At least I am thinking the bulb will have a prolonged suction as opposed to the pump?
 
What Mark described applies to both bulb and the pump. I personally like using the bulb. The pump is easier to hold stable while sucking and self cleaning. The bulb is more trickier and clogs alot requiring manual cleaning. From my experience, it seems the bulb is just faster when sucking many joints in short time.
 
Mark, is there a way to put on the new output transistors and power up the unit without damaging or blowing up anything else?
 
D.E.K said:
Mark, is there a way to put on the new output transistors and power up the unit without damaging or blowing up anything else?
Click to expand...

I'm working on it, on a way to power it up without outputs in place, to take voltage readings to see if it is safe to install the outputs. Something called a DC feedback path is needed, which is missing with no outputs in place.....

The alternative would be to test a bunch of transistors OUT of circuit, which would involve desoldering and resoldering...
 
I am extremely uncomfortable with the alternative...desoldering and soldering. I am 90% sure I am not going to be able to tackle it. I'd rather resort the first option. DC feedback path.
 
I've been trying to figure out how to do that without soldering. That amp does not yield easily.
 
Also, when I tried to desolder the components on the circuit board I am practicing on, the tips were all bent shut onto the circuit board. So even though I got rid of the solder, I had difficulty taking out the components because of that. In some cases, the green surface of the board just peeled off.
 
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