Re: Toshib 47Hl167 Regza Backlight issue

For those who may have been following this thread, I ended up just replacing the inverter master and slave. The least expensive way to go, I now have a working 47" set with no ccfl issues.
I suspect the controller IC (OZ0028SN) to be damaged and can't find the thing in the USA.

Re: Toshib 47Hl167 Regza Backlight issue

I was thinking ccfl issue but the high voltage never gets a chance to sample them.
This just gets more interesting the more I dig into it. I carefully measured all the pins of AS339 (both of them), AS324 and OZ9928SN. The following is a report of all the voltages. Starting with the top 339 (near the top of the board U31) pin 3 = 3.1v, pin 4 = .07v, pin 8 = .15v, pin 9 = .18v, pin 10 = .02v, pin 12 5.6v, pin 13 = .02v and pin 14 = .87v. the second 339 (from the top of the board U2) pin 3 = .9v, pin 5 = 4.9v, pin 11 = .18v. The 324 (just...

Re: Toshib 47Hl167 Regza Backlight issue

That's much better, thank you. I'll look at pins 2-5 as well.

Re: Toshib 47Hl167 Regza Backlight issue

Great, the only data sheet to be found and I can't read the diagram, it is too blury or unfocused. Is pin 6 enable and pin 9 voltage ref ? Not sure which pin needs grounding or a small voltage trigger?

Production date 11 2007. The set was given to me after it went black but still had sound. She replaced the power supply, I could have told her that was not the problem, well I have a good spare PS. The set powers up after about 8 amber led blinks (sine board boot) and steady green after that. A flashlight to the screen shows the menu or whatever you select. The backlight system does not even attemp to power up, as per service manual all the voltage readings are correct except for inverter master status, it should be 3.3v it reads .41v. There are no blow fuzes on the inverter boards, the primary...

Re: New Members - please post your introductions here

Folks, my name is Anton, jack of all trades master of nothing, from air traffic controll to zener diode replacement. I have a small business where my main income is from classic and vintage auto repair and restoration.

Always learning.