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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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AC to 9V DC adapter
I'm ahving problems installing an infra red TV relay. The
manufacturer thinks its the power supply. Does any one know how to test a Class 2 transformer? It is the usual wall plug transformer with a mini plug that plugs into the device. I'd appreciate some advice. John |
#2
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AC to 9V DC adapter
The first thing is to look at the back of it and see it the output is AC or
DC. Then measure the output voltage with the appropriate scale. If the desired output is DC, there is always the chance that you're not getting a clean output - check it with a scope to see. WT "John Russ" wrote in message ... I'm ahving problems installing an infra red TV relay. The manufacturer thinks its the power supply. Does any one know how to test a Class 2 transformer? It is the usual wall plug transformer with a mini plug that plugs into the device. I'd appreciate some advice. John |
#3
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AC to 9V DC adapter
John Russ:
Use a simple and inexpensive test meter to test it .... or find another device that takes the same plug and power voltage and polarity of the infra red TV relay. ..... or since the manufacturer thinks the problem is the power supply have them send you a replacement. A local Television/VCR repair shop should be able to assist you quickly and inexpensively regarding the testing of the power supply. -- Best Regards, Daniel Sofie Electronics Supply & Repair - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - "John Russ" wrote in message ... I'm ahving problems installing an infra red TV relay. The manufacturer thinks its the power supply. Does any one know how to test a Class 2 transformer? It is the usual wall plug transformer with a mini plug that plugs into the device. I'd appreciate some advice. John |
#4
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AC to 9V DC adapter
Wayne Tiffany:
Certainly correct suggestions that you gave, but I would think that if the OP had a scope and knew how to use it that he would not be asking how to check the wall wart power supply to see if it works. -- Best Regards, Daniel Sofie Electronics Supply & Repair - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - "Wayne Tiffany" wrote in message ... The first thing is to look at the back of it and see it the output is AC or DC. Then measure the output voltage with the appropriate scale. If the desired output is DC, there is always the chance that you're not getting a clean output - check it with a scope to see. WT "John Russ" wrote in message ... I'm ahving problems installing an infra red TV relay. The manufacturer thinks its the power supply. Does any one know how to test a Class 2 transformer? It is the usual wall plug transformer with a mini plug that plugs into the device. I'd appreciate some advice. John |
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