Did you make mistakes when repairing electronic?
I've got an email from one of my ERG members about "Did you make mistakes when repairing electronic?" and "During your mistakes your skills improved overtimes?".
My answer to him was:
Uncountable-Yes I made tons of mistake and I've improved my skills overtime.
Here are just some of the mistakes that I have made that I could think of at this moment
1) Did not discharge the big fat primary side capacitor and causing 2 holes on my hand
2) Did not check the electrolytic capacitor polarity after replacement. The cap blown immediately I turned on the equipment
3) Forgot to fix back the Monitor Anode cap causing it to spark at the ground and burnt out the Horizontal Output Transistor (HOT)
4) Did not check for dry joints in other circuit area till the set have to be sent back second time for repair
5) Did not use isolation transformer and the electrocution almost got me killed (dealing direct with live source back in the 90's)
6) Transistors and diodes placed the other way round shorting the components again
7) Did not test the equipment after repair throughoutly (burn in test) and this cause the customer have to send it back for second repair
8 Did not keep extra spare parts that is commonly use. It will be a waste of time running to town just to get one piece of part
9) Did not carefully check for solder bridge between components lead and this had caused the equipment not to work after repair
10) Bought cheap transistors (below market price) and it turned out to be incompatible even with the same part number.
I have made those mistakes and I have learned from it. I hope you also could learn from it without having to go through the above experiences. If you have mistakes that you have made we would like to hear about your story- please make a comment below thanks.