Factory made hot-sale XJM7-J Measuring box (Infrastructure Energy Measurement Box) for Angola Importers
Exterior and dimensions
Quality comes first; service is foremost; business is cooperation" is our business philosophy which is constantly observed and pursued by our company for Factory made hot-sale XJM7-J Measuring box (Infrastructure Energy Measurement Box) for Angola Importers, We warmly welcome business partners from all walks of life, expect to establish friendly and cooperative business contact with you and achieve a win-win goal.
XJM7-J metering box (infrastructure power metering box) is suitable in power supply system with AC 50HZ, rated voltage 380 / 220V , as the power measurement in construction site.
Meet GB7251.1-1997 and GB7251.3-1997 standards.
This TV was brought in my shop with no back light or sound. It turned out to be a simple repair. Diode D607 had become leaky. A resistance test showed it had 4.7 ohms in both directions. Since most of the bad Diodes I’ve encountered had shorts with less than One ohm of resistance, I almost failed to detect there was a problem. I mistakenly assumed the 4.7 ohms resistance I measured was due to other components in parallel with my Diode. Fortunately I removed the diode to test it again and it turned out to be bad.
The location of this Diode is D607. The original part number was MUR460AG. I replaced it with an MUR460G which was purchased through digikey. It’s a 4 amp ultrafast switching diode with 600 PRV and 75 NS. I have been made aware that the MUR460 with different letters at the end indicate if it’s a fast switching diode or an ultrafast switching diode. I figure ultrafast is the best choice.
This TV was made by LG. Model number of this TV is 47LS4500
For those I don’t know I have a website at http://www.tvrepairinfo.com/ where there is a directory to all my free videos case histories.
This is a short video done just to explain how contactor and auxiliaries relate in motor or machinery control.