How do I repair the solder of this component?
Just use a normal soldering iron (preferably temperature controlled) and liquid solder flux. Apply flux liberally, then put a little solder on the iron tip and rake it down the pins on an angle to heat up several pins at once (or use a 3mm spade tip like I do). 

The flux should prevent solder from bridging the pins. If a solder bridge does occur then use desoldering braid to remove it.