Re: Need schematic for Visio LC420
Wow, you are really very helpful and I thank you for hanging in there with me.
Really, I do and I know that I am going to learn more about this issue than I already have with your help but I do have more work to do based on your suggestions.
To answer your question about the tester I have a cheap HV generator sold on Amazon and other places for checking CCFL's. No model number on the case attached is a picture.
This lights up the low wattage <14 watts you suggest using as test fixtures for checking inverter output and it performs nicely for that purpose. That is what I am using to test my CCFL bulb as a tester confirming that it will detect HV.
Given the two HV outputs on the PS which is connected to the TV lamps, when testing these output points would the test CCFL not need to reference the common point or ground point of the Primary side in order to make an accurate check? I did not do this when testing the CCFL test buld and it the strengt of the HV was sufficient to light the bulb at least medium brightness or possibly full brightness given its low wattage.
The results of the CCFL test bulb on each phase of the HV lamp drive is NO LIGHT and as far as I could see, no noticeable flash for protection circuit to check the load. I then attempted to check the lamps in the set however only injecting the HV from the tester into each leading to the lamps. Saw noe of the lamps light. But is that test truly valid since the lams need both phases of the signal to even flash, and I can only supply one phase at a time?
Wow, you are really very helpful and I thank you for hanging in there with me.
Really, I do and I know that I am going to learn more about this issue than I already have with your help but I do have more work to do based on your suggestions.
To answer your question about the tester I have a cheap HV generator sold on Amazon and other places for checking CCFL's. No model number on the case attached is a picture.
This lights up the low wattage <14 watts you suggest using as test fixtures for checking inverter output and it performs nicely for that purpose. That is what I am using to test my CCFL bulb as a tester confirming that it will detect HV.
Given the two HV outputs on the PS which is connected to the TV lamps, when testing these output points would the test CCFL not need to reference the common point or ground point of the Primary side in order to make an accurate check? I did not do this when testing the CCFL test buld and it the strengt of the HV was sufficient to light the bulb at least medium brightness or possibly full brightness given its low wattage.
The results of the CCFL test bulb on each phase of the HV lamp drive is NO LIGHT and as far as I could see, no noticeable flash for protection circuit to check the load. I then attempted to check the lamps in the set however only injecting the HV from the tester into each leading to the lamps. Saw noe of the lamps light. But is that test truly valid since the lams need both phases of the signal to even flash, and I can only supply one phase at a time?
Comment