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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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Trouble with treadmill and transformer
I have a treadmill out of warrent that stoped working. The display
would not light up. I traced it to the "power board". I had someone at work check it and said the transformer is "open" and therefore bad. He said maybe some diodes on the same board are bad. A new board form the factory is 60 bucks. I would really love to fix this as cheaply as posisble. (Baby due any day.) Is it possible to just replace the transformer on the board? On the transformer it reads: class2 model/pin 15-8385 imput 115 volts output 8vac 1.6 amps. Where could I find one? ALso, how would I check for a bad diode with my voltmeter? The treadmill is an immage model number 1mtl3952. I am kind of a newbie but was able to diagnose the problem down to this circuit board based on the wiring diagram inside the cover of the treadmill. Thanks again! |
#2
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wrote in message oups.com... | I have a treadmill out of warrent that stoped working. The display | would not light up. I traced it to the "power board". I had someone at | work check it and said the transformer is "open" and therefore bad. He | said maybe some diodes on the same board are bad. | | A new board form the factory is 60 bucks. I would really love to fix | this as cheaply as posisble. (Baby due any day.) Is it possible to just | replace the transformer on the board? On the transformer it reads: | | class2 model/pin 15-8385 imput 115 volts output 8vac 1.6 amps. | | Where could I find one? First I would check the transformer. You need an AC/DC Multimeter. You need to know what to do. | Also, how would I check for a bad diode with my voltmeter? Most multimeters have a diode check function. I would use that. Then, I would check for DC output. | The treadmill is an immage model number 1mtl3952. | | I am kind of a newbie but was able to diagnose the problem down to this | circuit board based on the wiring diagram inside the cover of the | treadmill. | | Thanks again! | |
#3
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if the transformer is open its likely that somewhere in the winding of it
the wire is just burned out. to check a diode u need a multimeter that will do resistance checks, check resistance over the diode, one way (the right way) should be close to 0 ohms, the opposite way, should be very high (kiloohms,megaohms) if they are close to the same or both really high, it is bad. i dont know how well he checked it, transformers usually last a good while, to check it, just make sure its putting out the correct current right at the transformer. typically i usually find if the trans is burned out you can see it and may be able to smell it also. if trans good, look to the voltage regulator ic or transistor (assumeing it has one) one leg should have an input voltage from the transformer, another leg will have a much lower voltage that controls the load. the last leg should have the output voltage (for a 3 leg transistor). measure all of these to the ground and determin where you are loosing current |
#4
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"I would really love to fix this as cheaply as posisble. (Baby due any day.)
" AND "On the transformer it reads: class2 model/pin 15-8385 imput 115 volts output 8vac 1.6 amps" Maybe it is a good idea to spend the $60. You don't want that baby to growup with only one parent now. I mean chances are you won't kill yourself but why play around with mains voltage and rick it if you haven't had training? And if you end up in hospital, $60 is cheap, if the new transformer shorts and burns down your house, $60 is cheap, if the new transformer kills something else in the treadmill, $60 is cheap. Remember it is just a treadmill, don't zap yourself just to save walking outside. wrote in message oups.com... I have a treadmill out of warrent that stoped working. The display would not light up. I traced it to the "power board". I had someone at work check it and said the transformer is "open" and therefore bad. He said maybe some diodes on the same board are bad. A new board form the factory is 60 bucks. I would really love to fix this as cheaply as posisble. (Baby due any day.) Is it possible to just replace the transformer on the board? On the transformer it reads: class2 model/pin 15-8385 imput 115 volts output 8vac 1.6 amps. Where could I find one? ALso, how would I check for a bad diode with my voltmeter? The treadmill is an immage model number 1mtl3952. I am kind of a newbie but was able to diagnose the problem down to this circuit board based on the wiring diagram inside the cover of the treadmill. Thanks again! |
#5
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"Dingo" wrote in message ... "I would really love to fix this as cheaply as posisble. (Baby due any day.) " AND "On the transformer it reads: class2 model/pin 15-8385 imput 115 volts output 8vac 1.6 amps" It should be easy to find a suitable transformer, just make sure it's also class 2, which means if something shorts it will fail gracefully rather than catch fire, most these days are. |
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"Dingo" bravely wrote to "All" (18 Dec 04 09:26:19)
--- on the heady topic of " Trouble with treadmill and transformer" Many modern transformers, intended for consumer devices, have built-in fire protection in a thermal fuse that opens up when the windings overheat. Sometimes this thermal fuse is accessible and can be easily replaced but unfortunately it is sometimes buried under the windings. A*s*i*m*o*v Di From: "Dingo" Di "I would really love to fix this as cheaply as posisble. (Baby due any Di day.) " Di AND Di "On the transformer it reads: class2 model/pin 15-8385 imput 115 volts Di output 8vac 1.6 amps" Di Maybe it is a good idea to spend the $60. You don't want that baby to Di growup with only one parent now. I mean chances are you won't kill Di yourself but why play around with mains voltage and rick it if you Di haven't had training? And if you end up in hospital, $60 is cheap, if Di the new transformer shorts and burns down your house, $60 is cheap, if Di the new transformer kills something else in the treadmill, $60 is Di cheap. Di Remember it is just a treadmill, don't zap yourself just to save Di walking outside. Di wrote in message Di oups.com... I have a treadmill out of warrent that stoped working. The display would not light up. I traced it to the "power board". I had someone at work check it and said the transformer is "open" and therefore bad. He said maybe some diodes on the same board are bad. A new board form the factory is 60 bucks. I would really love to fix this as cheaply as posisble. (Baby due any day.) Is it possible to just replace the transformer on the board? On the transformer it reads: class2 model/pin 15-8385 imput 115 volts output 8vac 1.6 amps. Where could I find one? ALso, how would I check for a bad diode with my voltmeter? The treadmill is an immage model number 1mtl3952. I am kind of a newbie but was able to diagnose the problem down to this circuit board based on the wiring diagram inside the cover of the treadmill. Thanks again! .... Transformer designers take turns doing it. |
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