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The Philippine Electronics and Technology Forum > Academic Community and Professionals > Absolute Beginner Technical Discussion > parallel diodes with reversal position
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Author Topic: parallel diodes with reversal position  (Read 660 times)
orravan
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« on: March 10, 2010, 10:08:01 AM »
Gud day mga master...

ask ko lang kung anong component ito



Nag overload/nagsunog kase un luma kong stepdown transpormer habang nakasaksak un tv.
Pinaltan ko sya ngayon ng bago na mas mataas na wattage.
the problem is un component (above) is burnt out then un fuse busted din.

ang problem ko eh di ko na mabasa un label nung component at the same time hindi ko sya madistinguish
kung anong klase ng component ito.

any other suggestion na baka may ibang pang nadamay sa pag putok ng transpormer ko?

maraming salamat in advance.
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« on: March 10, 2010, 10:08:01 AM »
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TinTopHack
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« Reply #1 on: March 10, 2010, 11:04:46 AM »
Most probably - varistor yan It protects your input circuits against high voltage spikes.
since your step down transformer failed the varistor has to absorbed the overvoltage tha resulted. It shorted and caused your fuse to blow. You can get more info about varistors thru Google.
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The world, as everybody knows, is analog; unless, of course, it's digitized.
orravan
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« Reply #2 on: March 10, 2010, 11:13:47 AM »
Sir TinTopHack pwede bang alisin ko nalang sya sa circuits? o kung kailangan paltan eh may recommend kang value? my tv is 29 inch 110 volts input. thanks again
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« Reply #3 on: March 10, 2010, 11:16:18 AM »
I think that is a diac.
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DigitalMind
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« Reply #4 on: March 10, 2010, 11:18:22 AM »
based sa physical na itsura
Varistor

sa schematic
Diac...

kindly double check.
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« Reply #5 on: March 10, 2010, 11:19:44 AM »
Varistor also has the same symbol pero may dot sa dulo, so chances are, varistor nga yan.
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« Reply #6 on: March 10, 2010, 11:21:40 AM »
Quote from: defiance on March 10, 2010, 11:18:22 AM
based sa physical na itsura
Varistor

sa schematic
Diac...

kindly double check.

OT lang, asan na papi yung design.
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TinTopHack
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« Reply #7 on: March 10, 2010, 11:38:59 AM »
Quote from: TinTopHack on March 10, 2010, 11:04:46 AM
Most probably - varistor yan It protects your input circuits against high voltage spikes.
since your step down transformer failed the varistor has to absorbed the overvoltage tha resulted. It shorted and caused your fuse to blow. You can get more info about varistors thru Google.

Assuming sure ka na wala ng ibang piyesang nadamay and assuming na sure ka na na OK na ang replacement step down transformer mo then you can remove it, replace the fuse and turn on our TV.
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matalino ka man ngayon ay mapagiiwanan ka rin
« Reply #8 on: March 10, 2010, 01:39:30 PM »
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orravan
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« Reply #9 on: March 10, 2010, 03:12:23 PM »
maraming salamat sa mga details...
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« Reply #10 on: March 10, 2010, 10:18:26 PM »
Quote from: orravan014 on March 10, 2010, 10:08:01 AM
Gud day mga master...

ask ko lang kung anong component ito



Nag overload/nagsunog kase un luma kong stepdown transpormer habang nakasaksak un tv.
Pinaltan ko sya ngayon ng bago na mas mataas na wattage.
the problem is un component (above) is burnt out then un fuse busted din.

ang problem ko eh di ko na mabasa un label nung component at the same time hindi ko sya madistinguish
kung anong klase ng component ito.

any other suggestion na baka may ibang pang nadamay sa pag putok ng transpormer ko?

maraming salamat in advance.



Varistor nga yan sir, connected sa line 1 at line 2 (parallel sa AC source)..

http://docs-asia.origin.electrocomponents.com/webdocs/0785/0900766b80785545.pdf

Description = Varistor,metal oxide,radial,PCB mount,480Vrms,V480LA40A,
Maximum Voltage Rating = 480Vac / 640Vdc,
Maximum Clamping Voltage @ Current = 1240V / 50A,
Peak Current = 4500A,
Prize = 5pesos each.

(other specs. are available).
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