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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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#1
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How do I check a 12V AC Transformer?
I have an overhead, ceiling-mounted,.tracklighting system which
consists of six 35W Halogen lights on a 9-foot track with a canopy type, in-line transformer which is marked: I/P: AC120V-60Hz 1.5A, O/P: AC 12V 50-230W. Been working fine for 2 years but suddenly died. After making sure all connections were tight and of course checking the AC input side (which was OK) I removed the transformer which contains 2 wires (black/white) going in and 2 wires (Red, larger gauge) coming out. I just don't know how to check the output of the transformer to see if I'm getting 12VAC out? Do I just put my test probes across the two red wires? Or one at a time to a ground? Can anyone help me on this. Thank you very much. (As you can see, I know very little about electronics!) |
#2
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How do I check a 12V AC Transformer?
"Tony" wrote in message ups.com... I have an overhead, ceiling-mounted,.tracklighting system which consists of six 35W Halogen lights on a 9-foot track with a canopy type, in-line transformer which is marked: I/P: AC120V-60Hz 1.5A, O/P: AC 12V 50-230W. Been working fine for 2 years but suddenly died. After making sure all connections were tight and of course checking the AC input side (which was OK) I removed the transformer which contains 2 wires (black/white) going in and 2 wires (Red, larger gauge) coming out. I just don't know how to check the output of the transformer to see if I'm getting 12VAC out? Do I just put my test probes across the two red wires? Or one at a time to a ground? Can anyone help me on this. Thank you very much. (As you can see, I know very little about electronics!) Just put your meter across the two red output wires. Don't be surprised if this shows as more than 12V AC. That would be normal. I am guessing that if you disconnect the transformer completely and check the wires using your meter on resistance range, the output would seem fine but you would get no reading from the input. |
#3
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How do I check a 12V AC Transformer?
Tony wrote:
I have an overhead, ceiling-mounted,.tracklighting system which consists of six 35W Halogen lights on a 9-foot track with a canopy type, in-line transformer which is marked: I/P: AC120V-60Hz 1.5A, O/P: AC 12V 50-230W. Been working fine for 2 years but suddenly died. After making sure all connections were tight and of course checking the AC input side (which was OK) I removed the transformer which contains 2 wires (black/white) going in and 2 wires (Red, larger gauge) coming out. I just don't know how to check the output of the transformer to see if I'm getting 12VAC out? Do I just put my test probes across the two red wires? Or one at a time to a ground? Can anyone help me on this. Thank you very much. (As you can see, I know very little about electronics!) It's probably a switchmode power supply rather than a transformer, they do tend to fail suddenly when they go. If you have 120V in, the bulbs show continuity, and they don't light, the transformer is bad. |
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