Well just got my new 888D and decided to figure out the menus before reading the manual.
I went ahead and pressed everything and in doing so it looks like I've managed to trigger the calibration settings and now the iron set to 400c wont even melt some 60/40.
Hmm what to do...... went searching the HAKKO site for some sort of reset to defaults just to find there's no such thing
![Sad :(](https://www.eevblog.com/forum/Smileys/default/sad.gif)
It looks like I had two options
1. Send back to manufacturer for a service
2. Purchase a tip temperature tester like the HAKKO FG-100
Well as I'm pretty much broke now after buying the iron I settled for this quick hack.
1 - Turn on iron and give it 20 seconds or so to settle down the display reads 400°C
2 - Get a piece of solder and make sure it still wont melt I used SN99.3/CU0.7 1.5mm with a melting temperature of 227°C
3 - Enter calibration mode once more (hold UP for 2 seconds) and set the temperature to 230°C
4 - Now the iron thinks it's set for 230°C but we know it must be below that temperature as the solder has not melted yet.
5 - Set the tip temperature (Hold Enter for 2 seconds) and increase it by 10°C
6 - Check the solder for melting.
7 - Continue continue to increase in increments of 10°C until the solder melts.
8 - Go back into calibration and set the temperature to 230°C
This is in no way exact but it gets the iron back working. For more accuracy you could always increase in increments in 1°C units until the solder melts.
Note: Step 3 was added as I was unsure how far out I was i'm sure you could do without.
A bit disappointed HAKKO made the calibration menu so easy to access as it's quite like the normal temperature adjust. IMO it should be protected like setting presets which require a button press and the power switch.