Quote:
Originally Posted by Electronic M
Depends on the DMM, the TV and how clever you are. Some DMMs are only good to 600V and some G2s can get close to 1000V...Which would exceed what a 600V meter can handle......
.....I encountered that issue once on a friend's TV with their DMM. I needed to measure the 900V boost and the meter on hand was only good to 600V. I had a high IQ moment and realized that if I measured the voltage between the STABLE 400V B+ rail and chassis, and then measured the voltage between the 900V boost and the 400V B+ (a 500V difference) then add the 2 measurements I would effectively get the value of the voltage between the 900V boost rail and chassis ground without exceeding the voltage range/rating of the DMM! It worked like a charm and happened to be a key measurement to the diagnosis and eventual repair of that set.  |
Good to know! I took my chances and it appears to be outputting a whopping 20v.