I'm super new to soldering. I just want to get the basics down at first. I picked up a temp-controlled hot air gun and iron station, some wick, lead, flux, desoldering pump, tweezers, etc... I got a few junk modems laying around so i decided to test out and try to desolder the chips.
Looks like a bunch of 8-pin EEPROM chips on them. I added some flux to the legs, set the temp to 350 celcius on the hot air gun, circled around the chip for about 5-10 seconds and the chip easily slid off. But on a different modem, I could not get the EEPROM chip off for the life of me. Had the hot air going for 3-5 minutes, even raised the temp to 400 and it just wouldn't budge.
Is there some sort of special solder on this modem that makes it nearly impossible to get the chip off? Is there a better technique?
Looks like a bunch of 8-pin EEPROM chips on them. I added some flux to the legs, set the temp to 350 celcius on the hot air gun, circled around the chip for about 5-10 seconds and the chip easily slid off. But on a different modem, I could not get the EEPROM chip off for the life of me. Had the hot air going for 3-5 minutes, even raised the temp to 400 and it just wouldn't budge.
Is there some sort of special solder on this modem that makes it nearly impossible to get the chip off? Is there a better technique?