Question about Toshiba MW27F51 27 in. TV/VCR/DVD Combo

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Vertical output transistor

When I checked the parts list for this tv, there was no transistor with that name. I have tried several sites to get the part number with no success.
Any ideas besides throwing the tv away?

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Ic401 was shorted it takes la78041. But it also had two shorted diodes #30b,which crosses to a nte5035.
my set had retrace at top after it was fixed ,which in my case needed 2 caps c421 4.7/50v and c427 100/35v . change both at same time. also in my search of the board c402 4.6 /160v had been puffed up either from the i.c. shorting or another potential problem so change while you are in there as well as resoldering the whole vertical/ horizontal circuit board. any questions call me randy at 563-579-9473 thanks

Posted on Jan 26, 2009

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Posted on Jan 02, 2017

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Check and replace damaged component/s at its horizontal scan output section circuit. Check the LOT (Line Output Transformer) too for damage. Replace the horizontal scan output transistor. Check the input voltage to LOT. If the voltage is absent check the feeder resistor; if any. If you wish to get some details; check the site linked here. Pull up older posts.
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Most likely the frame output stage has failed. Would need model details and circuit to tell you more, but given the age better to scrap it unless you know a reasonably priced repair person.It could be as simple as replacing a transistor or IC, but I cant see the repair being economic.

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Vertical lines in sylvania tv


The cause for vertical line fault, is generally with faulty/damaged components at its horizontal scan output section circuit. Check and replace damaged component/s at its horizontal scan output section circuit. Check the LOT (Line Output Transformer) too for damage. Replace the horizontal scan output transistor. Check the input voltage to LOT. If the voltage is absent check the feeder resistor; if any. If you wish to get some details; check the site linked here. Viewing it in "Mosaic" or "Magazine" will make surf easy. Surf the site with patience. Pull up older posts.
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I have a 32" Sharp LCD tv and last night we had a


You have a bad HOT, horizontal output transistor. It will have a number on it, and you can find it here.
http://shop.ebay.com/i.html?_nkw=horizontal+output+transistor+&_cqr=true&_nkwusc=horizontal+output+transitor&_rdc=1
Watch part replacement videos to get this working again. Also check for bad parts around this transistor if you have multimeter and component experience.

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My research has determined that the vertical filter capacitors or vertical output transistors are bad. I have the schematic and parts diagram for my tv but I do not see those specific parts listed. Any...


hi there ! schematic diagrams sometimes are not complete with such information.all you have to do is :
1. look for the defective parts .
2. determine the cause or is there any affected parts?
3. capacitors and vertical transistors does have value that is indicated on each parts which is very visible in our naked eye.
4. replace the defective parts and buy a new one .its available in all electronics store near in your area. thank you.

Feb 08, 2011 | JVC AV-32D302 TV

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Tv was dead no vvidei no sound after checking found that power supply capacitor and horizontal deflection output transistor was defective i lost that tr no part no please tell me what should i do?


Hello
There are few models of Sony telivisions which uses transistors in vertical output section. It will be a matched pair of PNP and NPN transistors. According to Sony schematic which I have with me used 2SB6494(PNP) AND 2SD669A(NPN) as vertical outputs and 2SC2383 as vertical drive, 2SC1364 as vertical oscillator. Just try to get the orginal numbers or find its equivalents from data book. Ok.

Oct 17, 2010 | Sony KV-35S42 35" TV

1 Answer

Vertical line


Hello,

Most probably the vertical deflection amplifier is failing. The most common part that fails is the vertical output transistor.
The set is too old to find documentation on part numbers and descriptions. Probably the part is no longer available and you will need the assistance of someone who can help you find an equivalent transistor that will do the job.
Of course, without testing we cannot be certain the failure is the output transistor. It could be from something else such as the voltage regulator that feeds the dc line to the vertical section. Could be the vertical synchronous level that goes too low to trigger the vertical sweep generator.

Other bad parts in vertical deflection circuit though there are not that many parts that would kill the deflection entirely.

Loss of power to vertical deflection circuits. Check for blown fusable resistors/fuses and bad connections.

Loss of vertical oscillator or vertical drive signals
Good luck.

Jun 01, 2010 | Sony BRAVIA KDL-52W4100 52 in. LCD HDTV

1 Answer

SEVERE VERTICAL DEFLECTION FOLDOVER Only a narrow horizontal stripe about 1'' high appears on the screen


Hello sneakjock,

This is a problem with the vertical output signal. Check the vertical coupling capacitor, the vertical output between the yoke transformer and the vertical output transistor amplifier or (IC output). My odds are on the coupling capacitor being bad.

You will need a schematic diagram and an oscilloscope to check this problem. If you have a background in electronics you will have no problem solving this problem, however if you do not have a background in electronics, I would suggest getting a qualified TV repair technician to do the work on your TV set.

I hope this helps,

Thank you,

Shuttle83

http://www.electron-age-technologies-llc.com




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replace cap. 2465, cap. 2561, cap. 2460, and d6460

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My LG tv has suddenly got a problem with the picture. Whilst watching the tv with no problems at all, the picture was suddenly reduced to a thin vertical line down the centre of the screen and an awful smell seemed to come from the tv There is a short ckt in your tv in horl. section. 1 isolate power from horizontal section. 2 check for normal output from power supply. 3 check parts in horl output section a hor.output transistor b diode & cap in h/output trnsformerckt. c check for print. d if all are ok check for eht transformer. e if every thing becomes then reconnect hor output section supply. f put on the set.

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