the 2 wires = for analog rework stations
the 4 wires = for digital rework stations or those hot air with digital temperature display
How to Know if the Heating Element of your SMD rework hot air station is busted?
1. pls refer to page 7 of the hakko 850B manual. easy lang ang pagreplace ng heating element.
a good heater must have resistance of 70 -100ohms for 220V. if wala na sa ganyang range , busted heater siya & need to replace
actual pics. click to enlarge. ang nakapicture dyan is a brand new heating element, na ipapalit sa busted heating element