Lt7232 zener diode - Panasonic CT-36D31 36" TV

if you're meaning the voltage for the led, its 1.5 volts to 3 volts. runs of the 5 volts feed to a resistor. can run of the 12volt feed with a highly rated resistor.

I'm not sure what your question is. A zener diode is a voltage regulator of sorts. The zener voltage is the avalanche voltage...the voltage that the zener diode will maintain when it's connected in series with an impedance, usually a resistor, IF the voltage across the zener diode and the impedance, in series, is greater than the avalanche voltage (zener voltage), and the polarity of the voltage across the zener diode is thus: positive cathode, negative anode (i.e., reverse bias). The excess voltage (the margin) appears across the impedance. Zeners are often used as voltage reference diodes in regulated power supplies. Does this answer your question?

I'd be curious to hear where do the other guys found those 12V/500 mW.

I am holding in my hand a transient suppressor from an LCD TV power board with two lines on it - the first is saying LT7232 and the second is P6KE120A.

I can't find a reliable reference for LT7232 anywhere through Google, however P6KE is a well known series of transient suppressors and I am ready to bet this is the proper component here.

Hope this helps avoid confusion.

www.coppelltvrepair.com

The secondary output voltage comes out from is more than it should be there. That is why, the protection zener diode blows off, as soon as you switch ON the set. First find and repair the power supply regulator, for correct output voltage. Refer its repair book for details. After repair include the zener diode in place. OK.

You need a 5.1V Zener Diode. You can get a pack of two at Radio Shack for $1.50.

The zener diodes are 1N4774, I believe they are one watt. Try 3 watt metal oxide for the resistors. You might as well replace the 6800uF 63 volt main filter capacitors and the 220uF 50 volt capacitors while you're at it. Half the time the heat that cooked your other parts takes them out as well.

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.

Yes, Zener diodes can work both on forward and reverse biasing. The primary difference between a zener diode and the ordinary junction diode is it is designed specifically to operate with a reverse bias voltage that is high enough to cause the the device to breakdown and conduct a high reverse current. Hope this answers your question and provides you with some help. If you need further assistance please let me know.

If you do not mind, would you please rate my help. I would very much appreciate it. Thanks

DIODE ZENER 24V 1W 5% DO41 1N4749AOrder 'diode zener 24v 1w 5% do-41 - 1N4749A' online from Digi-Key. Manufactured by Fairchild Semiconductor. Digi-Key part number 1N4749A-ND.
parts.digikey.com/1/parts/420514-diode-zener-24v-1w-5-do-41-1n4749a.html - 22k -

I was not able to find any service or schematic for this model. The colors means that the value is 22.6 volts zener diode with the other blue band indicating where the cathode is.
Could you tell me where or what other components this zener diode is connected to?