Toshiba Regza 46xv54ou Two Flashes no 24v

[dick_barton]

Re: Toshiba Regza 46xv54ou Two Flashes no 24v

Follow the lead to the other end and see if there's a legend there

[scumdog1221]

Re: Toshiba Regza 46xv54ou Two Flashes no 24v

My apologies. I went to Shopjimmy and checked their inverter photo. Indeed they do have a legend for the pins and 1-5 are VIN and 6-10 are GND which is what I measured. I'm assuming VIN means the 24V or to be precise the 23.9V I measured?

[budm]

Re: Toshiba Regza 46xv54ou Two Flashes no 24v

My apologies. I went to Shopjimmy and checked their inverter photo. Indeed they do have a legend for the pins and 1-5 are VIN and 6-10 are GND which is what I measured. I'm assuming VIN means the 24V or to be precise the 23.9V I measured?

Please give the link to that SJ site, there should be 3 more pins for command signals.

[scumdog1221]

Re: Toshiba Regza 46xv54ou Two Flashes no 24v

Here you go http://www.shopjimmy.com/samsung-lj9...t-inverter.htm and I believe those pins are on the other connector...also here is a short not very high quality video I zipped up of the power on if anyone is interested

[budm]

Re: Toshiba Regza 46xv54ou Two Flashes no 24v

Inverter board CN001 pin 12 (ENA = BL-ON).
What DCV does it have at that pin when TV acts up?

[scumdog1221]

Re: Toshiba Regza 46xv54ou Two Flashes no 24v

I did a nice little balancing act with a drumstick and checked the other connector on the inverter. Results seem as labeled on the photo at ShopJimmy: 1-5:VIN (23.9V) 6-10:GND (0V) 11:ERROR_OUT (3.2V) 12:ENA (3.2V) 13IM (3.2V). Is 3.2V proper for the last three pins?

[scumdog1221]

Re: Toshiba Regza 46xv54ou Two Flashes no 24v

Hey I really appreciate the time you two have spent helping me out. Way way way cool. I wish I could by y'all a beer....

[scumdog1221]

Re: Toshiba Regza 46xv54ou Two Flashes no 24v

ok Bud I checked pin 12 as it powered on and it was 3.2V then I pushed power on and when the lights flashed it went to .10V back to 3.2V and to .10V on the second flash the 3.2V again.

[budm]

Re: Toshiba Regza 46xv54ou Two Flashes no 24v

I did a nice little balancing act with a drumstick and checked the other connector on the inverter. Results seem as labeled on the photo at ShopJimmy: 1-5:VIN (23.9V) 6-10:GND (0V) 11:ERROR_OUT (3.2V) 12:ENA (3.2V) 13IM (3.2V). Is 3.2V proper for the last three pins?

OK, you have all the correct command signals, the one I do not is the ERROR signal, if GOOD = 3.2V or Bad = 3.2V.
I will have to look at the service manual if it is active HIGH or active LOW system.
BTW, did you try powering up the TV without the LCD panel back in place to see if all lamps light up?

[scumdog1221]

Re: Toshiba Regza 46xv54ou Two Flashes no 24v

Yes and I got the flashes like in the vid I posted. The panel is still off.

[scumdog1221]

Re: Toshiba Regza 46xv54ou Two Flashes no 24v

I tried shorting to ground the Timer1 pin on the OZ9928SN inverter IC and the lamps stayed on as long as it was shorted. Does that indicate a problem with the inverter board?

[budm]

Re: Toshiba Regza 46xv54ou Two Flashes no 24v

I tried shorting to ground the Timer1 pin on the OZ9928SN inverter IC and the lamps stayed on as long as it was shorted. Does that indicate a problem with the inverter board?

Yes, the error detection circuit detects the fault in the first 3 seconds and shutdown the inverter circuit, so when you short out that timing cap it will no longer time out.
All the lamps look normal with no pink or red glow an the ends of the lamps?
Worn out lamp will have blackened ends.

[aaronwt6]

Re: Toshiba Regza 46xv54ou Two Flashes no 24v

Based on his pictures in post #8, they all look to be near their end of life to me.

[dick_barton]

Re: Toshiba Regza 46xv54ou Two Flashes no 24v

Where did you get the hint regarding shorting the pin in post #31. I came across a web page yesterday with something similar but cannot find it now.

Looking at Budm reply it looks like you have an inverter board fault.

[budm]

Re: Toshiba Regza 46xv54ou Two Flashes no 24v

FYI: OZ9928SN
https://www.badcaps.net/forum/showth...light=OZ9928SN

[dick_barton]

Re: Toshiba Regza 46xv54ou Two Flashes no 24v

Thanks for the information Budm

[scumdog1221]

Re: Toshiba Regza 46xv54ou Two Flashes no 24v

Here 's where I got the hint to short out the timer pin.
http://lcd-television-repair.com/How...ht_System.html
Thank you very much everyone.

[dick_barton]

Re: Toshiba Regza 46xv54ou Two Flashes no 24v

Here 's where I got the hint to short out the timer pin.
http://lcd-television-repair.com/How...ht_System.html

That's the page I saw but could not find again no matter how hard I tried.
Thanks