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TV fixing Dear sir: Im Cesar D Pradi of Cagayan de Oro , Phils. My problem is the TV DAEWOO I am fixing..No Power at all. I replace the zener diode R2KY b"cause its short and its regulator IC but still not working..the power regulator IC is very heat..i replace the correct value of parts sir..What the next step i make..thanks sir.

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Audio this all the time and can not be top down. That failure can be?

Posted on Mar 18, 2008

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On some of these sets i have notice a resistor opens leading to horz. osc. circuit allowing set not to come on as long as the diode you replaced is not shorting out again . Follow the path this diode takes to that circuit . It's been awhile since i've worked on one of those but they were a common problem . Also include the model # if this does not take care of problem and i'll do alittle research on that chassis. Good luck

Posted on Feb 28, 2008

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Daewoo Tv / video combo (DVM-20f6n).Always here a buzzing sound when on channels (such as news)that have scrolling going on , on the bottom of screen.Can i easily fix,not worth spending on


Main power supply [SMPS] section circuit fault. Check and replace damaged components, such as capacitors, resistors etc; at this section circuit. Contact any service technician.
If you wish to get some details; check the site linked here. Pull up older posts.
http://electronicshelponline.blogspot.com/

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Hello
There must be a direct short in its power regulator section. Normally a shorted switching output transistor at power regulator section will cause this fault. You have to check all the components in the power supply switching retulator section, including rectifier diodes, zener diodes, electrolytic capacitors, small signal switching transistors etc. In fact, you have to check the components in the entire power regulator system. Never put any more fuse into it as an experiment; this will make more components to get damaged. Check the sets' circuit well. OK.

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I have a Daewoo DTQ-14P1FC TV. It has been a reliable set for a long time. It recently has developed a condition where a thick white line appears horizontally when turned on. Once warmed up it is OK. Is...


I would say no it is not worth fixing. Use it till it burns out then dont bother with it. Im trying to find the service manual or the schematic diagram but all links turn up negative. But the parts to fix it if you knew how to solder circuit boards would be about 20-30 dollars including shipping. But i couldn't say for sure what it was without looking at the diagram. Im sure this isnt what you want to hear but i would once it doesnt work at all just buy a new one or a used tv off your local craigslist. Thanks, Midwest-tek

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1 Answer

We have a DLP television and it will not turn on and there is a red light flashing in the bottom right corner


you should check on the power regulator, usually there are several components that cause damage with symptoms like that. I will try to describe some existing components associated with such defects:

1. Elco 100uf/160 or 220uf/160 Volt, may have been damaged / leaking or dried fluid
2. Horizontal output transistor, such as D1554 or similarities
3. Zener Diodes (5Volt) for the IC Program or 12-volt regulator on the main Power (Live Area)

Also check the voltage B +, must be available 115-volt DC, when the TV is turned on. And 5-volt voltage to the IC program should be available even when the TV in stand-by mode

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1 Answer

I have the Toshiba TV/DVD Combo less than 3 years old


check thje following
the power reaching your switch via a fuse and power out of the switch, when switched on.
if the power is leaving the switch okay then check the power supply components
semi conductors, for leaks and shoots, zener diodes, and capacitors for variations and change of values especially electrolitic capaciturs. if you get a high voltage of 85 and above going to the transistor near the transformer, then check your line trasistor.

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Burnt Zener diode... Voltage spec??


On the cathode of the zener diode look for a filter cap and check its value the voltage of the zener should be less than the working voltage of the zener. Basicly its likely being used as a shunt regulator as protection and regulation of the voltage. When the zener hits a certain threshold it will breakdown and start conducting to ground until the supply regulates and then it will recover. If the filter cap for that voltage rail was 25V I would guess that the zener would probably be regulating between 12 and 20 volts. I'd pick a 15V Zener its probably +- %10 on the original and any system should be able to take a %10 tolerance as a general design rule.

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I don't know where you live or what TV stations are available, but many stations have already changed to digital before the new deadline. If the TV is still in good operating condition, I would get a converter rather than purchase a new set. You can still get a coupon at: http://www.dtv.gov/getcoupon.html

Good luck and thanks for using Fixya.

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1 Answer

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Hi here are some codes I have 0278 0624 If they dont work try programing the VCR
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2 Answers

Tv's dead


Check for shorted Zener in stand-by circuit , D814 C33PH, 33v Zener

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RCA 20f510td


Sounds like a thermal breakdown of a componet. it could be in the main power supply regulaor supply or even a bad capacitor in the power or sweep supply. In some cases Zener diodes can break down and change values after warm up. In some cases also bad solder connections in the highvoltage section, or the power supply can cause this problem. It is a hard call without being able to look at the set. Just a few leads on where to go first. most likly a combo unit, such as this one , would cost you more then a new one these days. Good Luck PS Please dont forget to rate this thread.

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