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Peter Kwele Posted on Jan 06, 2017

I have a Sansui SV2918 tv, my line output voltage is 46v and i have replaced the STRF6656 and the transistor next to it which was short-circuit in the PSU. Please help

5 Related Answers

Anonymous

  • 1 Answer
  • Posted on Jun 01, 2007

SOURCE: TV PROBLEM

After replacing the shorted Line driver Transistor, carefully removing and replacing the same CRT base circuit, resulted with the problem going away. I cannot say what really was the cause, but I suspect that there could have been some form of acing on the neck of the tube.

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Anonymous

  • 6 Answers
  • Posted on Apr 08, 2008

SOURCE: TV Will not fire up.

try this,hang the collector pin of the HOT then try to switch on check the voltage its 115v dc,and check also the oscillation drive at the base of HOT take your VOM at 10v ac,ther must be a flactuate at the pointer.if the two procedure are good.plyback is deffective.but if u dont have any measured voltage at the collector of HOT ur problem is in the power supply. mc44608 is use at all old model philips tv.email me for wat happend

Anonymous

  • 1 Answer
  • Posted on Nov 26, 2008

SOURCE: sansui tv sv2918

replace vert IC301, C432, ( D431 & R431 should also be blown)

Anonymous

  • 934 Answers
  • Posted on Dec 21, 2008

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.

bhatgiri73

Girish Bhat

  • 106 Answers
  • Posted on Mar 24, 2010

SOURCE: Tv not switching on Sansui SV2918

all the transistors ,& capacitors i.e 47mfd 63v or100mfd 63v must be changed before u on the tv. if 300v is not coming to middle pin of d2449 then 4.7ohm resistor(fusible) may be gone

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Check all the zener diodes on board for leakage. Replace them all and check. To get more details http://electronicshelponline.blogspot.com/ Search the site by type in the brand name of your device in the search box at the top right of the display window to get gathered all the related posts.
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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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Check the continuity of the CRT heater [pin 1~8]. If it is found open, no need to proceed. If it has continuity, check the AC voltage there when the LOT works. Should have about 6.2VAC. If not, check all the solder terminals and series resisotr. connected to this bus. 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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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. Surf the site with patience. Pull up older posts.
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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. Surf the site with patience. Pull up older posts.
http://electronicshelponline.blogspot.com/
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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. Surf the site with patience. Pull up older posts.
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Short circuit at the main board. 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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Can you please post the make and model. That would help u sto provide you with more details.

Thanks,
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