Beeptest Posted April 25, 2017 Share Posted April 25, 2017 Hi Guys, Anyone have a Stern single target opto board 520 5252 01 Any leads appreciated Sent from my iPad using Aussie Arcade Link to comment Share on other sites More sharing options...
robm Posted April 25, 2017 Share Posted April 25, 2017 If that is the same one for the swinging bell on acdc, quite often the small 3 legged transistor goes. Its a bit fiddly to replace but you can buy the part for about 50c rather than buy a whole board Sent from my SM-G930F using Tapatalk Link to comment Share on other sites More sharing options...
Beeptest Posted April 25, 2017 Author Share Posted April 25, 2017 Sent from my iPad using Aussie Arcade Link to comment Share on other sites More sharing options...
robm Posted April 25, 2017 Share Posted April 25, 2017 Yep, i have replaced 3 or 4 of the Q1 on these. its a BSS123 Mosfet... i was lying, they are 25c each!! http://au.rs-online.com/web/p/mosfet-transistors/6710321/?searchTerm=6710321&relevancy-data=636F3D3126696E3D4931384E525353746F636B4E756D6265724D504E266C753D656E266D6D3D6D61746368616C6C26706D3D5E5C647B367D247C5E5C647B377D247C5E5C647B31307D2426706F3D313426736E3D592673743D52535F53544F434B5F4E554D4245522677633D4E4F4E45267573743D3637313033323126 Just remove the old one, and you may need a pair of tweezers and fine soldering tip to put the new one in. It could be the opto itself, but in my experience Q1 seems more likely Link to comment Share on other sites More sharing options...
Beeptest Posted April 25, 2017 Author Share Posted April 25, 2017 Hi Robm Great tip Will try the Q1 Sent from my iPad using Aussie Arcade Link to comment Share on other sites More sharing options...
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