hello everybody...

i find it very hard to desolder a rom....

i would like to know what is your technique to desolder ?

best regards moshik g

 

I think you're getting soldering and welding confused.

 

Don't desolder if you have no idea what you're doing. Get some old dead boards with through-hole IC's to practice on first. That is IMPERATIVE.

Get a soldering iron with plenty of heat (at least 30W), some flux, and a desoldering tool. Use some flux about every minute or whenever it burns off. Heat a pin, press the button on the desoldering tool, and suck that solder off. When you do this enough, you end up with no more solder and can lift the chip.

Once again, this comes from someone who has soldered several thousand medium-sized PCB's, PRACTICE ON A JUNK BOARD FIRST. You don't want to ruin a perfectly good p28 or whatever ecu.

 

def practice, it also helps if you have a extra set of free hands. a fine tip for the soldering iron helps. heat it up plenty then suck it up with the desoldering tool.

with a little practice its not as hard as I thought, I actually learned how to solder on ecu's, I had a spare ecu laying around and started messing with it. Make sure your iron's pretty hot, then get to it, dont hold it in one spot for too long, just long enough to melt the solder.

 

i use a solder sucker to get the majority of it then i'll use soldering braid to get the rest of the little stuff.

I would most deff practice first though.

good luck.

 

Depends on the size of the ROM...I used to solder and desolder a lot as a tech.

Trick is to heat up the connection you want to desolder first and use the copper braid to absorb the melted solder. So basically you heat the connection first & when you see it's starting to melt, place the tip of the copper braid & put your soldering iron tip on top. If you place the copper before the connection gets warm you'll have the copper braid stick to the connection and you don't want that.

Like Parasonic said use some flux as well

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by nek0 &raquo;</TD></TR><TR><TD CLASS="quote">

Trick is to heat up the connection you want to desolder first and use the copper braid to absorb the melted solder.
</TD></TR></TABLE>



flux is the ointment ??

 

yep