mjrstar Posted February 24, 2022 Share Posted February 24, 2022 Wife's treadmill has become no-go, now if the was a cheap $1000 or whatever machine I'd send it to scrap and replace. But it's a gym spec heavy duty thing that's going to cost 5 grand or more for something similar.. The circuit board is showing no signs of life when powered up,(no clicks or less lightning up) I found the 250v infeed varistor looked sick so I took the board in and had an electronic guy replace that but he wasn't interested in further fault finding, still no dice. There are a bunch of relays and another transformer and an inductor coil, all of which seem to have no visible signs of damage.. I suspect it's something as simple a relay but equally a voltage spike may have fried other components.. I guess the main issue is it weighs a couple of hundred kgs so can't easily take it to the shop.. I guess what I'm asking Is there a systematic way I can check off each of the components which is likely to be the problem from most to least likely? A replacement board may or may not be available for about a grand, with the added complexity that I can only find a 110v unit, EX usa and it might be one of the other things that is stopping it from firing into life, not the board itself. Quote Link to comment Share on other sites More sharing options...
datlow Posted February 24, 2022 Share Posted February 24, 2022 Found a wiring diagram for it? 1 Quote Link to comment Share on other sites More sharing options...
mjrstar Posted February 24, 2022 Author Share Posted February 24, 2022 Just now, datlow said: Found a wiring diagram for it? Only an overall / general layout wiring diagram so far unfortunately.. Quote Link to comment Share on other sites More sharing options...
datlow Posted February 24, 2022 Share Posted February 24, 2022 post it up Quote Link to comment Share on other sites More sharing options...
mjrstar Posted February 24, 2022 Author Share Posted February 24, 2022 Ha, I have found a pdf for testing /fault finding, my previous search was junk! https://www.sportsmith.net/images/product_support\sportsart\Repair Manuals\6300_6310 Treadmill Repair Guide.pdf When it says black to black or whatever is that between the two black pins? Quote Link to comment Share on other sites More sharing options...
mjrstar Posted February 24, 2022 Author Share Posted February 24, 2022 Just now, mjrstar said: Ha, I have found a pdf for testing /fault finding, my previous search was junk! When it says black to black or whatever is that between the two black pins? Because I'm getting pretty much zero black to black but ~230 between black /yellow or black/ orange? Quote Link to comment Share on other sites More sharing options...
Corbie Posted February 24, 2022 Share Posted February 24, 2022 make sure you are following a 240v guide, not a 110v guide? unless there is a stepdown to 110v? Quote Link to comment Share on other sites More sharing options...
mjrstar Posted February 24, 2022 Author Share Posted February 24, 2022 Good point, Everything is labeled as 240 inside the unit.. So yeah I don't think there is a step-down to 110 anywhere. Quote Link to comment Share on other sites More sharing options...
Corbie Posted February 24, 2022 Share Posted February 24, 2022 @h4nd 1 Quote Link to comment Share on other sites More sharing options...
mjrstar Posted February 24, 2022 Author Share Posted February 24, 2022 It's looking like this step down transfer might be the issue. If I should be getting low voltage ac across each off the paired colours and it's got nothing, but it has good 230v in.. Transformer has open circuit when resistance test across the 230 in. (not sure this is correct?) It has zero ohms/ continuity on the output pairs. Quote Link to comment Share on other sites More sharing options...
h4nd Posted February 24, 2022 Share Posted February 24, 2022 Be careful, safer to work with item fed from an isolating transformer. Quote Link to comment Share on other sites More sharing options...
h4nd Posted February 24, 2022 Share Posted February 24, 2022 Could be thermal fuse in the input to the transformer, would have that symptom. look like it's been hot? Quote Link to comment Share on other sites More sharing options...
mjrstar Posted February 24, 2022 Author Share Posted February 24, 2022 11 minutes ago, h4nd said: Could be thermal fuse in the input to the transformer, would have that symptom. look like it's been hot? Is the thermal fuse inside the transformer itself? One side of the plastic on the transformer is darker looking. Quote Link to comment Share on other sites More sharing options...
h4nd Posted February 24, 2022 Share Posted February 24, 2022 42 minutes ago, mjrstar said: Is the thermal fuse inside the transformer itself? One side of the plastic on the transformer is darker looking. Often can be. Transformer might be standard or special. If standard, part number / spec may tell you. Disconnect from circuit, and measure the input resistance. if open, more clue. Quote Link to comment Share on other sites More sharing options...
mjrstar Posted February 24, 2022 Author Share Posted February 24, 2022 6 minutes ago, h4nd said: Often can be. Transformer might be standard or special. If standard, part number / spec may tell you. Disconnect from circuit, and measure the input resistance. if open, more clue. Yip, input is open circuit when disconnected. It appears to be special with 2 different output voltages maybe? Quote Link to comment Share on other sites More sharing options...
mjrstar Posted February 24, 2022 Author Share Posted February 24, 2022 Open circuit between the two in and also that 3rd Lonely one too. Do I dig deeper looking for a fuse? Or try and hunt down a new transformer.. Quote Link to comment Share on other sites More sharing options...
h4nd Posted February 25, 2022 Share Posted February 25, 2022 Dig deeper, that join'll probably be between 2 halves of the primary, around the secondaries. Probably still want a new transformer Quote Link to comment Share on other sites More sharing options...
mjrstar Posted February 25, 2022 Author Share Posted February 25, 2022 Bingo, Thanks guys for your help, I probably would have given up without finding that extra manual, and knowing to test the transformer. I have learnt a bit this morning.. Hopefully I can find a suitable replacement! 6 1 Quote Link to comment Share on other sites More sharing options...
mjrstar Posted February 25, 2022 Author Share Posted February 25, 2022 Just to confirm I did the twist n tape method in true os stereo install style and the machine fires up (not literally) just fine so it looks like I might be in the good books. 5 1 Quote Link to comment Share on other sites More sharing options...
h4nd Posted March 15, 2022 Share Posted March 15, 2022 You, ah, put a fuse/thermal fuse in there somewhere, right? Quote Link to comment Share on other sites More sharing options...
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