GWJepsen Posted January 25, 2021 Share Posted January 25, 2021 I have a 1602 blue board and port 7 stays on. I replaced the mosfet ( twice) and neither time did it change the issue. What else might cause this? Link to comment Share on other sites More sharing options...
TheDucks Posted January 25, 2021 Share Posted January 25, 2021 The OPTO driving it? Have you done the Board RESET? Link to comment Share on other sites More sharing options...
GWJepsen Posted January 25, 2021 Author Share Posted January 25, 2021 OPTO? I have done numerous resets. The unit is on my workbench with a single bulb pulled in. No data feed at all. Link to comment Share on other sites More sharing options...
dibblejr Posted January 25, 2021 Share Posted January 25, 2021 Normally this will indicate a bad triac. Are you sure you changed it correctly. Soldering/ Rework/ Reflow. JR Link to comment Share on other sites More sharing options...
GWJepsen Posted January 25, 2021 Author Share Posted January 25, 2021 Yes, but i tried a second triac just in case. I ordered the triacs off the internet. BTA16 600Bw Link to comment Share on other sites More sharing options...
dibblejr Posted January 26, 2021 Share Posted January 26, 2021 1 hour ago, GWJepsen said: Yes, but i tried a second triac just in case. I ordered the triacs off the internet. BTA16 600Bw I think if you contact LOR they may send you a Triac. Just open a HD ticket explaining the details. A video is helpful as well. JR Link to comment Share on other sites More sharing options...
radioguy1007 Posted January 26, 2021 Share Posted January 26, 2021 I'll second what Ducks said - opto coupler. Those are the 6 pin IC's that drive the gate of the triacs. I've had some start to "leak", then that turns on the triacs. Your triacs may be good as you have already tried replacing twice - just always being turned on. Link to comment Share on other sites More sharing options...
GWJepsen Posted February 1, 2021 Author Share Posted February 1, 2021 thanks, i just ordered some and will try it. Link to comment Share on other sites More sharing options...
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