Re: Toshiba Regza 46xv54ou Two Flashes no 24v
Here 's where I got the hint to short out the timer pin.
[url]http://lcd-television-repair.com/How_To_Bypass_LCD_TV_Inverter_Board_Shutdown_Backlight_System.html[/url]
Thank you very much everyone.Re: Toshiba Regza 46xv54ou Two Flash...much everyone.Re: Toshiba Regza 46xv54ou Two Flashes no 24v
scumdog1221
Member
Last Activity: 03-24-2016, 08:58 PM
Joined: 12-01-2015
Location: San Diego California
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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?...Leave a comment:
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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.Leave a comment:
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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.Leave a comment:
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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....Leave a comment:
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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) 13
IM (3.2V). Is 3.2V proper for the last three pins?...
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Re: Toshiba Regza 46xv54ou Two Flashes no 24v
Here you go [url]http://www.shopjimmy.com/samsung-lj97-01669a-backlight-inverter.htm[/url] 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 interestedRe: Toshiba Regza 46xv54ou Two Flash...n if anyone is...Leave a comment:
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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?Leave a comment:
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Re: Toshiba Regza 46xv54ou Two Flashes no 24v
There appears to be no legends as to what each pin should be that i can see printed on the board. And the underside is blank.Leave a comment:
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Re: Toshiba Regza 46xv54ou Two Flashes no 24v
ok there are 10 pins hooked up to the inverter right there. If we're using the pic for reference I started at the south end which is hidden under the main board in the pic and got 23.9 on the first 5 going north and 0 on the next 5.Leave a comment:
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Re: Toshiba Regza 46xv54ou Two Flashes no 24v
Well this might make you cringe but I took a jumper wire from one of the good inverter 24v pins on PE0564 made sure I had voltage and connected it to the 24V pin in question on the PE0563 and powered on with everything hooked up (no lcd panel) and there was no change. The two flashes as usual. So you think the 24V pin on PE0563 is not used in this version? There are alot of blank component spots on that board and a couple on the PE0564 as well. I don't think anyone tried to repair it previously...curiouser and curiouser as they say....Leave a comment:
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Re: Toshiba Regza 46xv54ou Two Flashes no 24v
Went ahead and hooked up the inverter (after cleaning the tabs) tcon and powered up with the panel off and it came on with a nice bright flash and then one more a couple seconds later just like I described in my first post. The inverter is getting 23.9V from the PE0564 power board (thanks again for the diagrams). On the PE0563 however (see red circle in picture) the 4th pin from the right labeled 24V is still reading 0.
On the PE0564 I checked fuses F801 F820 and F870 and they were good. I could not locate F807. On PE0563...Leave a comment:
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Re: Toshiba Regza 46xv54ou Two Flashes no 24v
Thank you for the diagrams. Fuses are good. When I check the inverter with the panel off do I need the tcon hooked up?Leave a comment:
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Re: Toshiba Regza 46xv54ou Two Flashes no 24v
Well I gotta admit for my first time taking apart a panel that was pretty cool. The video you referred me to was excellent. When I pulled the inverter I noticed some kind of oxidization on two or three of the tabs. What would that indicate? The back of the inverter was discolored on one end of it like it got pretty warm. Picture are below. I took some closeups of the CCFL tubes on the ends. You can see small dark circles. The tube holders looked like they were clean. Would i have test the tubes to know if they're burnt or not? I'm not...Leave a comment:
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Re: Toshiba Regza 46xv54ou Two Flashes no 24v
Wow. Thank you my friend I'm gonna dive into this and let you know what i find out.Leave a comment:
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Re: Toshiba Regza 46xv54ou Two Flashes no 24v
This is where I'm a real noob. What is the procedure to check the CCFL's? Can I do it by just pulling the inverter board and looking or do I have to go deeper? I apologize for my ignorance. I get the feeling you guys think this may be a compromised CCFL issue and not just a bad component on one of the boards? What would be the reason for the 0 volt reading on the 24V pin? I appreciate your patience folks.Leave a comment:
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Re: Toshiba Regza 46xv54ou Two Flashes no 24v
I've downloaded that manual before and when I open the html file it asks for something called 'zeus' and says it only works with IE6. This is the message:
"The ZEUS ENGINE cannot be located.
This Service Manual requires ZEUS ENGINE.
This might be caused whether the ZEUS ENGINE was not installed successfully or some setting in operating ZEUS Service manual with network environment was incorrect.
Please contact to the nearest TOSHIBA Service Center for further assistance"...Leave a comment:
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Toshiba Regza 46xv54ou Two Flashes no 24v
I was given this Toshiba 46xv54ou LCD which must have been near the beach here in San Diego because all the fake stainless rusted. When I plug in the tv the yellow standby light flashes 1-2-3 and does that three times then the green power light comes on. I hit the power and the relays click loudly and a nice full picture flashes on (i can see the menu for a sec) then goes out and then flashes one more time and goes blank. You can hear a faint buzz and see the backlights during the flash. No obvious fried or bulged parts. i replaced the charis board because the rust had done a number on it however... -
Re: New Members - please post your introductions here
Hello Everyone! My name is Paul 'Scumdog" Valentine and I'm a drummer and been into computers and CRT's since the late 80's. My first computer was a IBM PC XT with two 5 1/4 inch floppies and no hard drive. Those were the days. Hah! I found this forum and started working on flat screens that friends had sitting around and had some luck. This is an awesome forum and I usually learn something everytime I log in. The people that run this are amazing. Thanks!Leave a comment:
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