Question about Sony KV-27S46 27" TV

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Shut down, replaced vert ic which was burnt . new ic gets hot

And shutsdown again. the +13 and -13 read 12.65 v The sound does come up

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Check IC1509, Q1

Posted on Nov 17, 2008

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Service menu mode


You should first check the output voltages comes out from its main power regulator section; and to rectify the cause of this shut down first. Then only, there is any need to enter its service mode. If you're sound in electronics, and wish to get more details, check this link. http://electronicshelponline.blogspot.com/ Selecting the view option, either to Mosaic / Time slide, can be selected by the drop-down list, at the top left of the display window, will make surf easy. You can also do a search, by type in the brand name/model number/IC used, in the search box at the top right of the display window. Service mode entry, adjust and exit procedure to many brand TVs are given in detail.

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RCA hdtv sound but no picture


sounds more like a vertical problem since the audio still works. If it were multiple green lines then I would say green tube but the tube will usually shut a set down and it will be dead no audio. Try replacing the audio output IC

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Mitsubishi TS-4545 Shutsdown at start up


Good day, rios_4435;
Double check all, I said ALL cables, check the soldering performance on the IC's. Look very closely for bridged solder joints.You did something again double all of your work, make sure you installed correct parts, maybe new parts defective.
Good Luck, big IRISH.

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Check convergance amp ic and loose connections to the yokes.

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1 Answer

Still no picture, but there is sound


If you are getting static on screen you dont necessarily rule out the FBT, but if there is a fusible resistor by the FBT that is blowing it may be supplying current to the vert IC, the IC may be shorted internally or externally, check your connections and try replacing IC. Also check the pump up cap and if it is powered off the FBT the rectifier diode.

Jul 09, 2007 | Toshiba CZ32V51 32" TV

1 Answer

Toshiba CF3566A Tac 9190


the cuestion is if every time it shut down you have the hot shorted,or not. have measure the flyback/yoke/Hot working current? it must be under 0.6Amp ,if is greater something is wrong and cause overheating.Normally I touch with my fingers to "measure" the temperature. and what about the Micro?.there´s one pin that control power on/off ,is it good-solid data or is crazy . micro gets hot, have a correct 5Volt on its VDD pin. lot of cuestion that I hope helps you!!!

Jul 08, 2007 | Sony HMD A220 17" CRT Monitor

1 Answer

Picture problems


you have a vert sweep colapse. Fisrt thing is to get a schematic diagram and find the vert. output Ic and the clamper diode. Measure the voltage on both sides. If its low then its apossibility that the Ic was drawing loads of current and blew out the b+ feed resistor. Look on the schematic and trace back the voltage line from the vert output ic back to the sweep power supply on the secondary of the flyback transformer. check the limiter resistor to the feed and if its open replace the cap right there the resistor as well as the vertical output Ic ALL AT ONCE!!! If you dont you will cause it to go out again in a short time. Good Luck.. If you post the vert part of the schematic I will be more then happy to assist you with this repair.

May 01, 2006 | Symphonic SC3813 13 in. TV/VCR Combo

1 Answer

Vertical hold


You dont have enough vertical sweep!! Best thing to check is the vert output device and I think its an IC . BUT before that check the b+ going to that device and see if its low. I will run through a silicon diode right next to the ic. Measure both sides of the diode and if theres a big voltage drop then the diodes bad. Now also these sets are common for the b+ filter cap off thge flyback transformer. Its the voltage line that feeds that diode and the vert output section. Now measure all caps out of cucuit as most will measure good if you dont. Also just for giggles right nrxt to the big IC that has the vert ,horizontal video and sound drive there is if im not mistaking the vert parts start with c4-- or the ic will be ic4-- Its a small cap that will sayc4-- attached to nothing but the ground and one pin of the ic. I've seen this cap cause all sorts of vert problems in the past as its the vert waveshaper capacitor for the vert osc/drive. Good Luck

Apr 17, 2006 | Sharp 25VT-J100 TV

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