If you like and can help you please thanks + repįeel free to ask questions.
they apear to be very solid and reliable. PS - I ve repaired dozens of this units without replace one relay. Remind you this is a dangerous step as pins could solder each other! Use a magnify tool to check and re-check!Ħ - Search for other cold joint over the main board These are simple 2A SMD diodes like 1N400x series but rated at 2 ampsĢ - Check for solders on the 40 pin black connector (reverse side)ģ - Check marked power supply capacitor as well its diode and 5V regulator IC (TLE4269)Ĥ - Very important resolder each Array IC ULN2003 ( can be other reference)ĥ - Very Very important Resolder MCU / CPU with hot air or a very small iron tip with flux. Its based on my repair experience with this unitsġ - Check for all marqued diodes (cold joints, burned diodes, etc)
I made a simple tutorial with component identification for UCH N1 / N2 / N3
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