This is a great way to rip some of the tracks strait off the board. Specially the fine ones around the smaller capacitors. At least hold the base with a screwdriver as some else suggested.
Yes, I have taken measures sometime ago to prevent this. DE-soldering is very hard so this mechanical removal works the best. Some of the traces can be compromised because of leaking capacitors and is unaviodable. Thanks!
I have modified the way this is done. I now hold the brown plastic base with a small flat blade screwdriver. This helps to prevent the copper traces from being pulled off the board.
Very helpful note ..are you saying that some replcment items / parts for the sw-77 cannot be found these days ?There's no way to find it at specialized online shops ?
Possible both the capacitors and the ICs may be at fault. Shorted capacitors can pass DC voltage to critical components, some of those are no longer to be had.
Not all capacitors go bad or are bad, early builds of the SW series damaged the electrolytic capacitors, mainly from the soldering. This could cause the caps to leak and be out of range in value. Many of the caps are DC blockers and failing their job can lead to damage of other components. Many times the caps would show leakage as turning the solder joints as grey and 'fuzzy' looking also the leakage will go under the solder mask and turn the copper traces black. Some components for the SW77 are not to be found.
Altex Ian With electrolytic caps for the most part with consumer grade electronics of any kind whether in a car, portable radio, ect. The maximum life span is about 25 years or so. So it is almost a certainty if you are having odd operating issues on any electronic device like these those electrolytics are the likely source of the problem I have found this to be the case from decades of experience with such items. The electrolytics are the weak link in electronics even to this very day.
This is a great way to rip some of the tracks strait off the board. Specially the fine ones around the smaller capacitors. At least hold the base with a screwdriver as some else suggested.
Yes, I have taken measures sometime ago to prevent this. DE-soldering is very hard so this mechanical removal works the best. Some of the traces can be compromised because of leaking capacitors and is unaviodable. Thanks!
I have modified the way this is done. I now hold the brown plastic base with a small flat blade screwdriver. This helps to prevent the copper traces from being pulled off the board.
I've watched two other videos where the SMD caps are twisted off rather than rocked. That seems like a better method.
Very helpful note ..are you saying that some replcment items / parts for the sw-77 cannot be found these days ?There's no way to find it at specialized online shops ?
Good Night, I wonder if it is possible to resurrect my iCF SW77 because does not work no AM or FM band. Would be the capacitors or some CI.
Possible both the capacitors and the ICs may be at fault. Shorted capacitors can pass DC voltage to critical components, some of those are no longer to be had.
how you know the capacitor is faulty?
Not all capacitors go bad or are bad, early builds of the SW series damaged the electrolytic capacitors, mainly from the soldering. This could cause the caps to leak and be out of range in value. Many of the caps are DC blockers and failing their job can lead to damage of other components. Many times the caps would show leakage as turning the solder joints as grey and 'fuzzy' looking also the leakage will go under the solder mask and turn the copper traces black. Some components for the SW77 are not to be found.
Altex Ian
With electrolytic caps for the most part with consumer grade electronics of any kind whether in a car, portable radio, ect. The maximum life span is about 25 years or so. So it is almost a certainty if you are having odd operating issues on any electronic device like these those electrolytics are the likely source of the problem I have found this to be the case from decades of experience with such items. The electrolytics are the weak link in electronics even to this very day.
oh ok.
great instruction video , very usefull !
Just I have to do the same :)
73'
Andrew
sp9waz