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UNKNOWN VALUE OF VOLTAGE ZENER DIODES

THERE ARE TWO DEFECTIVE COLOR CODED BUT I DONT KNOW ITS VOLTAGE VALUE,THEY ARE=RED RED BLUE AND W/BLUE BAND ON ITS LEAD

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  • mcbdalisay Aug 23, 2008

    there are two defective zener diode in the power supply section of the panasonic tv model:TC-21F3P.one is a stripe yellow zener diode and second is stripe gray zener diode.i dont know the value and the voltage. any suggestion?pls

  • Jaime Hernandez May 11, 2010

    Could you provide the model number of your TV?

    I could try to find the service manual.

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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?

Posted on Jul 02, 2008

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6,2 V zener dioda red,red,blue

Posted on Sep 23, 2009

It is the national/panasonic color tv,model # TC-21F3P
please give me the exact value of this voltage zener diode. red red blue and a blue band labelled on one of it`s lead.thanks

Posted on Jul 02, 2008

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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.

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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.

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