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What type of diode bridge arrangement is more common in alternators used in heavy truck applications?

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What is the main function of a reverse polarity diode, what would happen if it was blown


Hi,
a diode in reverse polarity could be used e.g. for protecting some circuit against improper polarity of supply. It could be connected in serial - but it is in forward polarity - (disadvantage: voltage drop) or in parallel - reverse polarity - with a fuse in serial to supply. This way is often used with Zener diode - protection against overvoltage in addition. Try to google e.g. "how to protect against improper polarity". For this type of protection could be used special types od diodes - transils - they could be one- or bidirectional. In case of a diode failure, the supplied circuit may not work - it depends on the way of diode connection and type of its failure - short circuit or disconnection. But there is many diode application: try https://en.wikipedia.org/wiki/Diode https://en.wikipedia.org/wiki/Diode#Applications
Jiri

Apr 24, 2017 | Radio Communications

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Going through starters and alternators?


If you keep replacing starters and alternators, they aren't the problem. Starters: check your battery's ground cable.
Alternators: Make sure you're also replacing the rectifier circuit. Alternators make alternating current and it must be converted to direct current. This happens in the rectifier, and arrangement of three diodes. Diodes are like a one way street for electricity. But sometimes, they fail and leak backwards.
Then they quietly drain your battery overnight. It drives a lot of people nuts figuring that one out.

on Aug 13, 2012 | 2000 Ford Ranger SuperCab

1 Answer

Battery drain


bad cell inside battery,so it won;t hold the charge,if battery checked OK,it might be a bad bridge (three diode inside alternator,change AC to DC) in your alternator

Apr 22, 2014 | Chevrolet Avalanche Cars & Trucks

1 Answer

Charging problem


There is a thing called a bridge rectifier. It clips 1/2 of the AC power coming from the alternator. It makes the battery think it is getting DC - it is actually rectified AC. If there is a bad diode in the bridge, your battery will not charge. Test with a flash light battery and lamp. Good will pass power in one direction but not the other. If you can get the light to work in both directions, there is a bad diode.

May 08, 2013 | 1988 Suzuki GSX 1100 F (Katana)

1 Answer

My fuse blew in my Samsung 53" Plasma TV. I changed it, but it's blown again? What should I do next?


The fuse blown because theres a short circuit connection in the PCB power supply of your television.Please check the power supply inside,remove the back cover to see the power supply section.unplug first to avoid electric shock.Will you check the bridge type diode first.If the bridge type diode or diodes is shorted the fuse is always blown.Using digital tester check diodes,regulator transistor,and other transistor around the power supply.

Jul 16, 2011 | Televison & Video

1 Answer

My battery light came on while I was driving..I just bought a new battery in December and nothing cuts off...the light is just on?


The alternator is most likely the problem here.The alternator has a diode out in the diode bridge,and is causing the light to come on,this is a warning that the alternator is failing,and needs to be replaced,this could cause the battery to discharge over night,and it will not charge correctly.

Aug 16, 2010 | 1998 Mazda 626

1 Answer

2001 Dodge Grand Caravan battery light is on. Battery and alternator have been checked and are ok. What could be wrong?


The alternator has a bad diode in the diode bridge in the alternator,this turns the light on,even though the alternator checks good,and is charging correctly,there is a bad diode,this diode ,along with others,changes ac voltage to dc voltage,if not replaced,it will start causing components to go out.

Feb 08, 2010 | 2001 Dodge Grand Caravan

1 Answer

Sony kp-46wt520 blinks 9 times


you can use basic power supply diodes ecg 125s or diodes rated at 60 herts at 2.5 amp. these type of diodes are common to alot of power supply diode bridges and if you have any junk electrical boards then you could borrow them used, don't worry they will last longer than the original new ones which were not very efficient from the start.

Sep 07, 2009 | Sony KP-46WT520 46" Rear Projection...

3 Answers

Engine system service required


You need to attach an automotive scanner to the car to decode what service is needed. You can of course do this at the dealer for big bucks, but a local parts store such as Pep Boys or Advance Auto will often do it for free.

Jun 17, 2009 | Volvo V50 Cars & Trucks

1 Answer

I recently received a really nice R600 Kenwood.


Hi Doug,

To my knowledge, the Kenwood R600 straight from the box runs only on AC power hence no DC jacks.

However, there is a DCK-1 accessory which is a DC cord kit for this receiver.

Alternately, the secondary output of the transformer is 14VAC which is feed to the bridge diode of the power supply on the PLL unit/board. With that in mind, it would then be OK to hardwire 13.8VDC right after the bridge diode and parallel to the big filter capacitor. It may be a good idea to put an inline reverse protection diode and a fuse. Of course any DC type of jack/plug combination/arrangement may also be used.

Additionally, you might be interested in a service manual for the Kenwood R600 which is available here.

Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.

Good luck and kind regards.

Thank you for using FixYa.

May 04, 2008 | Kenwood...

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