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Toshiba model CF30E50, have problem with picture shrinking on the horizontal. problem comes and goes but getting worse.

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5 Suggested Answers

  • 556 Answers

SOURCE: Toshiba 3387DB Television

it is due to 60Hz HUM IN POWER SUPPLY. please check for input supply. also check for mains filter capacitor in tv. also check for one diode open in rectifier ckt.

Posted on Oct 06, 2007

  • 1694 Answers

SOURCE: Toshiba CF30E50 TV shuts off

Best first step is: Good visual inspection = look for hot spots
on PCB, check caps in those areas + solder any/all bad connections,esp. low voltage regulator pins.Look the whole
board over with magnifier = solder,solder,solder...T.

Posted on Oct 25, 2007

  • 20 Answers

SOURCE: Toshiba CF30E50 TV shuts off

You power supply coil is bad (transformer) prolonged run time causes to heat material as a result of expansion loss of contact no conductivity red light no power

Posted on Oct 25, 2007

wyoed1
  • 211 Answers

SOURCE: Picture on RCA TV shrinks to a horizontal line

Hello,
Sounds to me you have a cold solder joint ( loose solder connection ) on the printer circuit board around or on the vertical chip or on one of the vertical capacitors. You may also have a bad vertical chip or a bad vertical capacitor, but I doubt it since it did come and go. I'de get a soldering iron and some solder and touch up the connections. I will remind you that you need to always excersise saftey by making sure, before removing the back, unplug the TV from the wall, and use care not to come in contact with the large red wire going to the back of the picture tube as the picture tube can be turned off and still store lots of voltage ( up to 35,000 volts). Always stay safe and when soldering, use care not to run solder across places that will make a short.
Good Luck and I hope this helps
Ed Meshechek ( Radio Man )
NC Electronics
Mills, Wyoming
307-266-4675

Posted on Dec 19, 2008

daniel719
  • 240 Answers

SOURCE: Shrinking Picture

problem is bad soldier on the vertical IC , this part needs to be resoldier to solve your problem, its a simple job for any tv repairman.

Posted on Jan 11, 2009

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