Question about Sanyo DS27800 27" TV

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Narrow wavey picture across screen-has good sound and color

When first turned on, the TV has a narrow wavey picture across the screen. The TV has good sound and good color. After a while when the unit warms up the wavey picture will clear up and fill the screen as it should. The TV will be fine all day long until you turn it off and let it cool off.

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Re: Narrow wavey picture across screen-has good sound and color - Sanyo DS27800 27" TV Standard (CRT) Televisions

Check the main filter cap and B+ line.

Posted on Nov 04, 2007

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Horizontal problem

The narrow picture is often related with a dried reservoir capacitor, the big capacitor placed in power supply section. You can test connecting in parallel a good capacitor with the same capacitance and working voltage (generally 400VDC). You shoul take all precautions required on working with high voltage such as discharging capacitors before dessoldering anything from the board, not touching the "hot" parts, etc.

Jan 10, 2013 | Philips Magnavox 27MS343S 27" TV

1 Answer

The picture is smashed down to a narrow horizontal line

Check solder on the vertical output or change it. Dont know # but look for IC screew on heat sink with about 7 to 14 pins.

Apr 28, 2010 | Jensen TS2050J 20" TV

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26 inch TV turns off 3-15 times when 1st turning it on - it has a slightly narrowed and shortened picture that over 5 minutes becomes normal and the TV runs normally until turned off - is it a major...

sounds like power supply maybe going depending on how old unit is may not be worth fixing goto pawn shop or thrift store or yard sale i got 26 inch from yard sale for 5 bucks works awesome!!!! Use it it it pukes,but in mean time l would look for replacement!!!!!

Jul 05, 2009 | Standard (CRT) Televisions

1 Answer

Turned on, and picture went out(just a line)with sound. never had problem with picture,but remote stop working about a year ago, cable tech said its tv not the remote

If it's a horizontal line across the face of the picture tube, your TV has a problem with its vertical output. Most likely, it's bad solder connections to the vertical output IC. Because this part gets very hot during normal operation, the connections to the circuit board can crack and the part quits working. All you see then is that narrow line across the tube. A few minutes with a soldering iron to repair the connections is usually all that's needed to fix the TV. It's also possible the part has truly failed, but the bad connections a much more common. A service shop could do the repair if you don't know anyone with the soldering skills.

Mar 29, 2009 | Panasonic CT-25G6 25" TV

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No picture, only a horizontal line across the screen

Hi and welcome to FixYa,

Your described problem indicates failure at the vertical deflection circuitry. Almost always, this would be a defective vertical IC. In some instances, this could also be caused by the absence of Vcc (supply voltage) to the said IC. This is a relatively easy/quick repair. What would be more challenging is identifying the IC, removing it, and replacing. Replacement would be readily available from most electronics part stores including Radio Shack.

Good luck and thank you for using FixYa.

Feb 24, 2009 | Zenith Standard (CRT) Televisions

1 Answer

I have an RCA color television model # F25653BC. It sat in storage for two years. We got it out and it works except there are narrow bars across the screen all up and down the screen. What is the...

sounds like what we call "jail bars" if this the case replace the screen cap. It should be around the flyback and rated at 200 volts at least

Jan 10, 2009 | RCA F32650 32" TV

1 Answer

Intense white & coloured horizontal line on black background on startup

I wouldn't attempt as the capacitors on a tv store around 25000 volts this is more than enough to kill you and they keep there charge even when the tv is off. Either take it to a repair shop or put that money towards buying a new tv - Do not even attempt to open the tv. (It sounds like maybe a tube has gone or the electromagnet that makes the beam move vertically is gone.

Sep 03, 2008 | Standard (CRT) Televisions

1 Answer

Problem with my insignia tube tv!!!!

if that look like horizontal line shuld be vertical problem. check vertical ic around it of resistor& capacitor. good luck!

May 26, 2008 | Insignia NS- 27" TV27 TV

2 Answers

No picture, only sound

The set has a shorted vertical output IC, probably a TA8427k. The capacitors around the heat sink of this IC dry out and cause the IC to run hot. The correct repair is to replace the vertical output and the electrolytic capacitors near it. Also use 105 centig instead of the original 85 centigrade. The is some time a pico fuse or current limittng resistor which must also be replaced. This a common problem with Toshiba and is not a bad picture tube. The usual cost of this repair is around $120-150 depending on the integrity of the technician. Scrivitron

Jun 18, 2007 | Toshiba 27DF46 27" TV

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