Question about Goldstar GLV-B1000 4 in. Television

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Shorted la7833 no picture no sound

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Replace it with a new IC. It won't cost more. http://www.rem-tv.odessa.ua/datasheets/v_def/LA7833.pdf
Try this link to know more about this IC. Electro help

Posted on Apr 22, 2014

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How to fix a television burn la7833 when i turn my tv


The LA7833 is a monolithic linear IC for vertical deflection
output for large color television sets,this ic will need to be replaced after finding the fault that caused it to burn in the first place.

Apr 22, 2014 | Audiovox VE727 7 in. Under Cabinet TV

1 Answer

TV Picture shrinks down more and more until it gets to a line.


You may have a cold solder joint around the Vertical circuit. Resolder the pins of the LA7833 IC and the components around the IC.
Check the C308 220uf/35V & C320 100uf/50V.
Nous Sabre.
www.aaatvservice.com

Jan 28, 2012 | Toshiba 32A33 32" TV

1 Answer

Turned tv on and I get no picture. The power lite blinks slowly instead of staying in constantly


swap out q301 Part# La7833s on board. Discharge crt first. youll need a cheap desolder vacum tool and 30 watt solder iron, Got mine from the shack. also small tube of heat transfer paste for q301. just did my dads set and it works fine now . cant guarantee that will fix yours. part was only 2 bucks plus shipping make sure part is genuine toshiba with the S

Jan 16, 2011 | Toshiba 32A32 32" TV

3 Answers

Whent he tv is on, we see a thin horizonal line. the sound is good...you can hear what's going on, just a black screen with thin horizontal line. TV is only 2 years old. Toshiba TheatreView SD


HELLO

I wish I had a £1 for every time I answered this! This is field collapse where the probable cause is the Field Output IC itself, or dry solder joints on the board where the IC is soldered in.

If you are not familiar with electronics then I urge you contact a service centre in your area.

ALL THE BEST (:-)

Nov 09, 2009 | Toshiba 32A33 32" TV

1 Answer

I am repairing my sister TV {Toshiba TN61X81}. The original was no picture and with sound. Upon troubleshooting the vertical deflection, ihad move the screen control for all 3 crts to see the horinzontal...


The easiest way I have found to set the screen controls is to tune into an old black and white show, turn the green up until you see retrace then slowly turn it down until it just dissapears then adjust the blue and red for a true black and white picture.

Sep 08, 2009 | Toshiba TN61X81 61" Rear Projection...

1 Answer

Toshiba 32a32 chassis tac 245 powers up for 1 secopnd then red power light flashes.


just fixed one with that problem it was the vertical output ic Q301
that was shorted. try wicking it out. it is a LA7833S.
Postings say to be sure to use the Toshiba part

Aug 17, 2008 | Toshiba 32A32 32" TV

1 Answer

Toshiba 32A32 won't turn on


just fixed one with that problem it was the vertical output ic Q301
that was shorted. try wicking it out. it is a LA7833S.
Postings say to be sure to use the Toshiba part

Feb 27, 2008 | Toshiba 32A32 32" TV

1 Answer

Sound but no picture


This is a common problem that shops see every day... Due to the age, size and ultimately the heat this unit generates in several of the component areas it has developed ring cracks in one or more areas. The likely suspects are the convergence amps - this unit uses two STK392-110 Sanyo built amps mounted on a large aluminum heat sink. Or it coud be the vertical Ic, which in your unit is a LA7833 mounted on a smaller heat sink.
You'll have to remove the boards enough to look underneath and see where these components mount to the foil side of the PC board. If you inspect closely enough (get your reading glasses) you should be able to spot one or more of the pins in either of these two areas that are ring cracked. Simply re-flow a little solder on those pins and put it back together...
If any of this sounds too complicated call around and ask what a shop charges to comeout and solve this kind of problem (ring-cracking) causing intermittent picture loss. It shouldn't be costly.
Good Luck
Bill

Nov 30, 2007 | Toshiba TP50H95 50" Rear Projection...

1 Answer

Where buy la7833s


The LA7833 is a vertical IC and available several places here in the states. If you can go online try acme enterprises in Florida for the best prices. http://www.acme-sales.net/index.shtml
At ACME they're 1.79 american and they do ship to Canada and Mexico...
Hope this helps!
Bill

Nov 13, 2007 | Toshiba TP55G60 55" Rear Projection...

1 Answer

No picture


In the late 70's I was OJT for America West TV, the ink still wet on my CET diploma. I can remember my instructor Bod Fagren saying, "if you're not certain you can do it don't attempt to guess, ask questions..." It sound like what youre describing is a loss of vertical deflection. This is usually caused by the vertical IC having shorted out. In the 61H60 that IC is Q301 an LA7833s Toshiba p/n#23319787 and costs about $20 bucks. But other components feeding that IC, resistors and caps should be tested to determine if the IC failed due to heat or was stressed because of higher than normal voltages. In all a shop usually carries that part on-hand or has access to it. And the repair can usually be completed in a couple of hours. In short, I'd have it done by a reputable shop. Taking the TV to them will help keep the costs down too. If you're not too sure where to find a good repair shop try calling NESDA (National Electronic Service Dealer's Assn.) and they can usually give you a couple of referrals to one of their member's shops in your area. Good Luck Bill

Jun 05, 2007 | Toshiba TP61H60 61" Rear Projection...

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