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 you can to take apart the drills, put the battery directly to the motor. If it is turning the , probably the switch is faulty. If it is a controlable speed drill, check the FET transistor. I recently replaced the FET in a Ryobi drill. Cost $5 and workin glik ebrand new.
On Ryobi & Ridgid tools the first part of the serial number is the date stamp. It may start with one or two letters (older models have no letters) then a series of numbers, the first four numbers are the date stamp. The first two numbers are the year and the second two numbers are the week it was made. A tool with the serial number CS0812 01234 would have rolled off the assembly line the 12th week (third week of March) of 2008. This does not account for the shipping, storage, stocking time to get it on the shelf for you to buy.
With an ohmmeter between the prongs of the power plug and the switch turned on, rotate the motor and watch for a drastic change in the resistance. Theresistance should be fairky low.
IF during the rotation the resistance goes way up, there is a failure of an armature winding.
I notice it says variable speed, so the above may not work. The next plan is to bypass the speed control to see if the problem might be with the control... I suspect that is where the problem is. Bypass the control putting full voltage on the motor an see if it runs. If it does, then speed control has a problem.
The problem I have seen is the trigger. I know it's a pain, but that was the the problem with mine......The trigger has an integrated regulator and Rheostat that controls speed and voltage and when she goes,...........That's it! Sorry.....
hi , the bad news is you have almost certainley damged the motor and may have damaged the switch ( it is also the speed controller ) , the good news is because its a Makita then you will have little trouble in getting spares for it , if you repost the actual model and what country your in and ask for a spares diagram/parts list i will help further
Measure the dc output (with multimeter) on female plug. Should read ±16 – 20V DC. If no voltage here open charger and measure 220v AC on input wire before transformer. No voltage faulty input cable or 3pin plug. If ok check for dc voltage after transformer. If transformer faulty (not worth repairing) replace with same dc volts and amp (important)output. Check now output cable.
If voltage is on cable but base does not light up, probable faulty capacitor. If light is on but does not charge, probable rectifier that gives too little amps.
Any good tv repair technician can help you. My tv tech already fix about 9 of my torch and drill chargers. Parts usually about R5 – R10.
ps. email me the specs of your charger the input, output, the current (MA) and the voltage 14.v or 21v to email@example.com
It could be the contacts on the switch are burning out. The 92 also had an electronic speed regulator that could be going out.
After you run the drill and it stops. Unplug the drill, take the handle off and apart. Feel the screws on the switch were the wires are connected. If one of them is hot to the touch that usually means the contacts are burning up.
The part number for the switch is 152274-19 . Dewalt doesn't sell the individual parts for the trigger assembly. It really depends on the manufacturer of the trigger at the time of production. You should be able to locate a company name on the side of the trigger switch assembly. It may be Marquardt. I am unaware of any way to order individual parts for these type switches. If you find a source please post.
There seems be problems with the electrical systems of the Dremel 1800 scroll stations (had same problem) Speedcontroller burns out and DC motor gets hit by Main AC voltage. Earth leakige due to low resistance between DC motor Rotor and earth (flowing current to earth) Measure rotor copper connections to earth to check for low resistance, should be very high. Biggest problem is that the main metal body under full main voltage comes and this is a dangerous situation!!!!!!!
All to fix is to repalce (both) fauly parts, Motor Controller and DC motor