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Why the Voltage accros zener diode is20 that should be 24

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Check the series resistor for developed high resistance value. Check the input voltage too. Electro help

Posted on Apr 04, 2015

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Equilent for a zener diode (RD 30ESB2)


Zener diodes are invariably used as low power voltage regulators or as a voltage reference for voltage regulating circuitry.

Zener diodes are sold by wattage and reference voltage by numerous component suppliers and constructor stores and in theory the voltage is marked on them, though difficult to see and easily defaced.

Finding an equivalent for what appears to be a manufacturer's part number presents a rather difficult challenge. The official service sheet will probably provide the required voltage. Without that information you will either have to purchase the component from the manufacturer under the part number or experiment until the required value is discovered.

Mar 02, 2016 | Televison & Video

1 Answer

In panasonic modeltc-29sf3 pls give me the working voltage of zener diode with color code gray red red and red yellow in power supplyn section


just read the model and then google it, beside, if you short them, you need to replace them with same value, and this will be determined by the circuit, if you did not change the circuit - just buy two new diodes and install them, do not bother with voltages as they have some tolerance and type will determine it.

Jan 27, 2015 | Panasonic Televison & Video

1 Answer

What is the zener volt


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?

Apr 16, 2013 | Computers & Internet

1 Answer

What is the velud of these zener diodes Phillips 50" Model 50PF94310/37 Plasma


Try to download the service manual to this set by internet. It will have all details you want to know.

Aug 24, 2012 | Philips Magnavox 27MS343S 27" TV

1 Answer

My hitachi 29in ctv power supply 110vac had a problem on zener diode will blown if we switch on the tv. what spare parts to change so that the power supply zener diode will not blown again and the supply...


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.

May 08, 2012 | Hitachi Televison & Video

1 Answer

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.

May 07, 2009 | Emerson Televison & Video

4 Answers

Ziener diode


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

Dec 08, 2008 | HP Pavilion dv6000z Notebook

3 Answers

UNKNOWN VALUE OF VOLTAGE ZENER DIODES


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?

Jul 02, 2008 | Televison & Video

5 Answers

Tv does not power up


I have seen the schematic, d982 is a 13v 1/2w zener
-GR

Jun 28, 2006 | Mitsubishi CS-35503 TV

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