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Kvj21pf1 set stand by condition

Sir, sony kvj21pf1 model television first horizontal transistor(d1878) short and replace it and then on few seconds screen full red colour then goto stand by mode and main filter voltage around 15 to 20 v. how to rectify sir, please help me

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6ya6ya
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Posted on Jan 02, 2017

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SOURCE: horizontal output transistor

You can Swap them if they are of the same rating, must check the wattage. cause the width problem & the power transistor become over heat. you can also use both of them in parallel, if they are ok. your tv live longer.....
HAVE A NICE DAY...

Posted on Feb 12, 2008

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premtech
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SOURCE: dead set, HOT transistor keeps shorting

It's the copper coiled magnet on the neck of the crt closest to the front of the tube.

Posted on Dec 21, 2008

  • 1 Answer

SOURCE: can I use the transistor d1878 horizontal instead transistor c5148, I have the specifications for c5148, but I can not find the specifications for d 1878,someone can help me?

I have Sony TV, transistor D1878 is damage, can i use the another type for replacemen?

Posted on Apr 01, 2010

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1 Answer

I want the exact horizontal output transistor of that model. Because some technicians have taken out that transistor.


If you wish to get some details; visit the site linked here. Pull up older posts.
http://electronicshelponline.blogspot.com/ Circuit diagrams of many popular brand TVs and other devices are given.

Nov 11, 2017 | LG Televison & Video

1 Answer

Helo sir, i have a L.G T.V. Model No kf-20p32..is blowing the horizontal output..i change the flyback tranformer ,bt is still blowing the horizontal output


Check all the capacitors connected to horizontal output transistor. Especially one connected with its collector to ground. a high voltage [1.5Kv]. capacitor. Replace them. Check for any short inside the winding of the yoke. It is difficult to detect the winding short inside the yoke. Connect an other yoke in place, after pulling out the CRT base card out of the TV. This you can make sure about the condition of the deflection yoke.

Oct 02, 2012 | Televison & Video

1 Answer

Respected sir after on tv goes on protaction


hi,
Check the horizontal out put transistor of your tv. i think it has get shorted. The horizontal out put transistor become shorted when the LOT ( line out put transformer) have some problem in its winding. check these two first. if found faulty replace the same. if you need nay more assistance feel free to contact through fixya.
ok

Mar 08, 2011 | Sony KP-FX532M91 TV

1 Answer

Dear sir i have samsung 21 inch flat television now horizontal drive transistor fails after few hours i replaced 3 times the same transistor(tt2222) but again geting fails so pls let me know what is...


Hello
You just replace the freewheeling capacitor, normally come up to a value of 5600pf 2000V or so, connected to the collector of the horizontal output transistor, fitted very close to the collector lead. Replace the yoke return capacitor, 0.33uf or so also. Usually samsung sets use no heatsink for the horizontal output transistor. You just put a small heatsink to it and check. If it doesn't overheat, you can remove it later.
You can suspect the deflection yoke also for shorted winding. To check this. pull out the CRT base board out of the neck of the picture tube, place it where it doesn't get short circuited, and unplug the deflection yoke connection from the main board, and switch on the set. See whether the transistor overheats now. If it doesn't overheat, suspect the deflection yoke for shorted turns of winding inside it. Till the transistor overheats, suspect the LOT.
NOTE: Never switch on the set while unpluging the deflection yoke connection plug from the circuit board, without dismandling the CRT base board. CRT may get damaged, with a black burned spot inside the center of the screen.
OK.

Dec 15, 2010 | Samsung CXJ1952 19 in. Combo

1 Answer

My Sony Trinitron stand by/timer light is on and will let me put tv on but only stays on for a few seconds . Model #KV27S66 Oct 99


Your TV has an overload due to some faulty components inside it. This type of fault is usually noted with overheating of horizontal output transistor connected to LOT of the TV. This may be due to LOT fault, or fault to the transistor itself. When it overheats, it put a short between supply rail, and the power supply regulator system inside your TV will detect that short and will shut down automaticaly. Please note; if the TV works after some time, say after 15 or 20 minutes; and again shuts down after working for a short period, and the cycle repeats, surely there is a winding short inside LOT, which cannot be detected by normal multimeter measurments. If it is so, replace LOT and the horizontal output transistor at the same time.

Oct 14, 2010 | Sony Televison & Video

2 Answers

Transistor d1878 get over heat


i have a sony kv-2197m3 i replaced tr D1878 tv turn on,but image it's bad in horizontal seize and tr D1878 was shorted again what's the matter? chek68@gmx.fr Post Solution

Oct 11, 2009 | RCA 27F530T 27" TV

1 Answer

Television


replace the horizontal transistor near the EHT.

Jul 19, 2008 | Mag Innovision InnoVision XJ 717 Monitor

4 Answers

No Power on Sony TV


Be sure to use an ORIGINAL Sony transistor and be sure to resolder the pins of the small horizontal driver transformer and all parts connected to and around it, and your set should be fine.

Aug 17, 2007 | Sony FD Trinitron WEGA KV-20FS120 20" TV

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