Question about Dewalt DC920KA Heavy Duty Xrp 18V Cordless Drill/Driver

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Speed control transistor

I recently burned out the speed or voltage regulator transistor. the numbers stamped on the transistor are'nt the actual part numbers. does any body know the part numbers so I can just replace the damaged part not the whole switch. Thanks.

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If ur drill is DW988 use switch # 152274-19
if ur drill is DC925 use switch # 152274-25
see www.ereplacementparts.com for parts & diagram

Posted on Jul 26, 2008

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Posted on Jan 02, 2017

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Speed is inconsistant, spray it with deoxit. still will not hold speed. Whats the best way for the spray to get into the pots?


It might not be anything to do with the pots. Speed problems can be caused by the circuit controlling the voltage. If there is a voltage regulator transistor or IC they can go faulty. The motor itself can also get dirt on it's contacts, or become so worn that they make erratic contact.

Feb 04, 2016 | Audio Players & Recorders

1 Answer

Onida 21''ctv picture coming in stamp type {cutting from four sides}


Hello
Replace its Horizontal output Transistor. If the base-emitter junction has a leak inside it, this type of fault will occur. Before replacing it, check the main DC voltage to LOT [Line Output Transformer]. It should come around 102VDC. If there is not this much voltage, check the electrolytic filter capacitor connected across thie supply line to main negative for open or value developed. Replace the same is good. Till there is low voltage found, check the retifier diode that rectifies this 102 volt DC. If all the above are OK and still you get a stamp like raster, check the heat of the Horizontal Output Transistor described above. if it overheats, LOT is defective and should be replaced with same type and number. OK.

Jun 12, 2011 | JVC Televison & Video

1 Answer

This is a Wagan 2003-6 400Watt with USB DC to AC Inverter. Worked great for almost a year. Recently fan was varying in speed under load. Then finally blew my vehicle cigarette lighter receptacle fuse. ...


A few thoughts on this. With the transistors, if these are a darlington style of transistor, it might show a short on a good transistor. The USB "transistor" is a voltage regulator, 12v to 5volts dc. With the inverter input, some inverters use a diode in the input to protect against connecting the inverter by reversed leads. This diode might be shorted and be causing your problem. If it comes to changing the transistors, it might be cheaper in the long run to buy a new inverter. The transistors might be problematic and might not be the only thing problematic. Experience here talking!

Feb 05, 2011 | Wagan 20036 400 Watt Power Inverter Corp

1 Answer

1988 nissan sentra fuel and temp guage voltage regulator


emissionwiz is wrong.
there is a voltage LIMITER located behind you gauge cluster.
Small silver box usually 4 numbers stamped on back with three wires out of it, yellow, blue, black.

May 19, 2010 | 1988 Nissan Sentra 2 Door

1 Answer

Tr51 gets hot


This is part of a Darlington Amplifier section of voltage regulation to the Final transistor it may be getting hot for various reasons one you may be taxing its resources by long key downs or you may have too much voltage going into the radio it should only be supplied with 13.8 Volts Maximum more than that (Volting the Radio) Will over work thhis transistor and eventually burn it out.

May 10, 2010 | Galaxy Radios DX 77HML Base CB Radio

1 Answer

Pmp3000 problem power supply.ic circuit problem.number series ic circiut..


I have a PMP5000 that I had to resurect. I had to trace out the power supply to repair it.

I can give you hint: First, a small supply runs directely from the line and generates some of the small voltages. While this starts, the main power caps are charged through limiting resistors. The main switcher is brought online and if the power amps acheive balance, then a relay connects the speakers and shorts the limiting resistors.

This is what is in the 5000 and I suspect the 3000 is similar.

In my 5000, there was arcing at one side of the power amps. The board was burned and three power fets fried. Cancer of burned board had to be carved out and traces replaced by hardwiring.
In addition, the limiting resistors were blown open, both main switching transistors were blown and 4 small driver transistors (surface mounted) and several diodes AND a switching regulator chip (surface mounted).all fried/

Hint: When restarting the unit, put a 150 watt light in series with one of side of the power input to limit the current in case you did not get all the dead bodies out.

This is a class "D" amp which drives PCM waves into a filter which is then the audio output. It is much more efficient thaan a linear amp.

Dec 24, 2009 | Behringer Pmp3000 16 Channel Audio Mixer

1 Answer

My 2002 Troy Bilt 18 hp garden tractor has a voltage spike which burns out the light headlight bulbs. Actually, we received this tractor as a donation for sale at a charity auction. It needed a few repairs...


Locate and replace the voltage rectifier this is a voltage limiter than can go bad, trace the wire that comes out of the motor's shroud it should go to a small box that then has a wire that leads to the battery this small box will be the voltage regulator or rectifier they are similar devices, replacing this box should solve the problem however before replacing the light bulbs again after replacing the regulator or rectifier hook up a voltage regulator to the positive terminal of the battery while the tractor is running at a high rpm or engine speed, if the voltage reads higher than 14 volts the light bulbs will burn out again but this is a simplistic electrical system and the voltage rectifier or regulator restricts the voltage from exceeding 14 volts so replacing it should do the trick.

Oct 21, 2009 | Garden

1 Answer

Fuse blows, Disney DTD1363


It look like this is the PN p5nk50zfp.
This site has your part. Data sheet
This part, it might be your voltage regulator not the horizontal output transistor.
Good Luck.

Mar 12, 2008 | Disney DTD1363-CAR 13" TV/DVD

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