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What's the voltage of zener diode number 908 on the Hitachi C25-F 100 model on the power supply?

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If you wish to get some details; check the site linked here. Pull up older posts. http://electronicshelponline.blogspot.com/
http://schematicscom.blogspot.com/
http://electrotechnician.blogspot.com/
Circuit diagrams of SMPS section of many popular brand devices are given. Search the site by type in the "brand name" of your device, in the "Search box at the top right of the Homepage" to get gathered related posts

Posted on Dec 13, 2016

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Posted on Jan 02, 2017

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SOURCE: tv does not power up

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

Posted on Jun 03, 2010

gopakumarg43
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SOURCE: my hitachi 29in ctv power supply 110vac had a

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.

Posted on May 09, 2012

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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

Pls help me find exact value of the 2 zener diodes in power supply of tc21f3p


It is very difficult to give you the exact voltage of the zener diodes you're discussing here; as there is no other details about the position or part number of them at the circuit board. If you wish to get some details; visit the site linked here. Pull up older posts. Surf the site with patience. http://electronicshelponline.blogspot.com/
Schematic diagrams to SMPS power supplies to many popular brand TVs and other devices are given. Refer it please. Hope; it will help you to check it out.

Jul 06, 2015 | 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

LG 32lh200 power supply failure common problem


You might try to follow the diode back to the source and read voltage to know the value of the diode and also look on the diode for generic number--short of that Google the model number with "parts" as it might be cheaper to replace the board than try to fix it by guessing values.

Aug 27, 2012 | LG 32LH200C-A1 LCDTV 32LH200C 32inch Wide...

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

DIODE PART NUMBER 907 ON POWER SUPPLY CIRCUIT HAS HOW MANY VOLTAGES


That diode part number is not recognizable. IT IS possible that the full number is 1s1907.which is a 400PIV diode.

If the diode is about 3/8 inch long and 1/8 diameter replace with a 1N4007 which should have adequate voltage margin if it is a rectifier diode.

One has to be careful as the original could also be a Zener regulator. The board nomenclature for that would likely have "ZD" followed by a number. Verify the diode is used as a rectifier type by tracing the circuit enough.

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