[quote author="minkok"] try to re solder with an iron ( not by hot air ) U11 and U15 and U5/ pin11[/quote]
[quote author="salavat"] 'iron heats up while 26 C is shown' - you probably reversed plus and minus wires for iron heater somewhere. 'jumpy readings' - read one my posts above - the reason could be in bad soldering, resolder again those mentioned in the post chips.[/quote]
I checked all the pins and measure traces between components and all seems OK. I checked heater connection and is connected properly.
I hooked up C245, but without middle connection (heater disconnected) and went to calibration menu. When it was cold ADC shows 0. Then I heat up iron with another iron up to 350°C and ADC value is rising steady and slowly up to 300 and over. I believe ADC part is working but when I connect heater and go to the main screen temperature stays at ~20 °C. I believe it has to do something with switching between heating and measuring temperature, but I can't figure it out where to check.
HI guys. I am trying to get my uni-solder working, but I have few problems and I don't know what is the problem. I checked all soldering and it seems fine.
When I power up unisolder it shows "21" for a 1/2 second and then goes to normal screen (showing no-instument, because I have nothing attached). I connected 10 ohm resistor for calibration, but readings are jumpy. It reads ADC: 540 (numbers are jumping around +- 5), but time to time it jumps to around 314 (few times a second, I recorded a video and checked).
I checked voltage on 10 ohm resistor and its stable around 3.5mV.
If I connect T245 without heater the temperature shows around 20°C, but when I plug also heater the iron heats up over 300°C but temperature on display shows around 26°C and heater is on (I had connected heater for max about 3-4 seconds, because I am afraid I will destroy it otherwise).
