Question about Dewalt 7.2-18.0 Volt One Hour Charger

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I think diode D23 is defect, but I cannot see any number on it. Please advise

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Go to this LINK and find the part/diagram that can help you.

Please thumbs or post back,thanks

Posted on Nov 04, 2010

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Posted on Jan 02, 2017

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1 Answer

Need resistance for diode d23 for DeWalt dw9116 charger


Diodes do not have a resistance. They have a forward bias current and a reverse voltage limit. There should be a number on the device for a google x-reference.

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Diode D23 in De9116 charger


D23 is a transient voltage suppressor. Code: 1.5KE51A

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I had to replace that on one of mine. It is not a regular diode. P6KE51A Transient Voltage Suppression (TVS) Diode. That is the part # on the USA model. A European model may use different #. 8645a6dd-c755-4fe7-a00b-699ca51bc6af.jpg

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Polarity protection diode d23 d28 classic


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I installed a new s-meter in my cobra 29 bt and was putting everything back together and once I plugged the power to it, it sparked and now wont turn on. but my ohm meter says there is power all over the...


replace D23 with N1004. That is your polarity protection diode. Also you may want to replace D8.

Take note of what side the strip is on so when you put it back in, you put it in the right way.

Be careful not to plug the wires in the wrong way or you will blow those diodes again.

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Powering up problem.


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Help!


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JVC will repair your camera free of cost. Click JVC CCD Customer Notice for details
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Cobra 29ltd classic : no rx / tx


Hi,

D23 is the reverse protection diode and it shorting is the primary reason your fuse blew. As you posted, power was applied in reverse, hence other components would also fail. Pls check:
1. D22 - 9.1V Zener Diode
2. TR23 (2SC1096) 9 Volts regulator
3. D19 - 5.1 Zener Diode
4. IC4 (TA7222) - Audio Amp
5. TR14 (2SC2029B/10) - Finals
6. TR15 (2SC2028B/20) - Driver
7. Most capacitors over 220uF (like C123, C114 & C112)

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

Good luck and kind regards.

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2 Answers

Power was reversed now radio keeps bowing fuse and will not come on


Hello hubcap,

 

When the power was reversed this shorted out one of the components, possibly an Operational Amplifier. This tells me that there is no diode protection and possibly the circuitry is exposed directly to the input power supply. The fix would be to find the shorted component with the use of a schematic and a multimeter. Once you correct the shorted component then if possible you can add diode protection by putting a diode (forward biased direction) in the path of the positive line.

 

Again you will need a schematic, and a multimeter to work on this problem.

 

I hope this helps,

 

Thank you,

 

Shuttle83

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