Question about Dremel Stylus Rotary Tool

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Burned circuit board on Dremel stylus

I need part information for the large semiconductor (I think diode) or voltage regulator on the circuit board. It is burned beyond recognition! I can't read several of the numbers.

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  • mkvyper Apr 05, 2009

    Same problem. Dremel Stylus starts turning, and stalls sometimes even before touching a working surface.
    Component indicated as Q1 looks really overheated, but only "F4", a diode symbol and "UM" below it are recognizable on it. If anyone has an opened stylus (it's as easy as removing three screws and one label...) I'd be grateful

  • Peter Hamza
    Peter Hamza Apr 18, 2017

    same problem after 5 years, Q1 - looks like Schottky diodes

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3 Suggested Answers

rowdy45176
  • 2176 Answers

SOURCE: Dremel Stylus model 1100

I would contact Dremel.com and talk to their tech department about a warranty repair for this tool.

Posted on May 08, 2010

  • 28 Answers

SOURCE: Replace the docking station-charger of dremel stylus

ebay.com or www.craigslist.com
Try to find a used one maybe?

Posted on Sep 01, 2010

jo83286
  • 4 Answers

SOURCE: Dremel Stylus model 1100

Change the capacitor 220uF and it will most certainly work again. I got the idea from FixYa and it solved my problem!
Easy to change just 2 soldering points and a component costing around 0,2 Euros. If you do not know how to operate a soldering tool ask someone for a quick assistance. The switch takes around 2 min (1,5 min to open the charger and 0,5 min to change the component!).

/Johan

Posted on Apr 02, 2013

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2 Answers

How test circuit diode schottky


Take your digital volt meter. Place meter on the diod setting. Place your probes on each leg. You should read .7 to .2 in the forward position and infinity or high megs in the reverse position. You'll need the data sheet to find out spec.

May 30, 2014 | Electronics - Others

1 Answer

Fault finding


If your tv does not turn on at all Look for the voltage rectifier, voltage regulator. Diodes and resisters in the power circuit. Burnt solder traces, the flyback transformer, the horizontal and vertical output transistors. and especially bulging or dry electrolytic capacitors (which is what caused all of the others to fail) The symptoms that the electrolytic capacitors need replacing are lines on the screen, and later black bars on the top and bottom of the screen. To test any semiconductor use a solder ****** and a solder gun to remove the solder gently until you can remove each part test using a multimeter on diode setting. test the legs in any order for open circuit or short circuit if you have a high reading one way and a small reading the other way then the component is good. Any component that gets hot enough to need an aluminum heat-sink is suspect.

Oct 20, 2013 | Panasonic Televison & Video

1 Answer

Sharp micro doesn't heat


see this causes and fix it. God bless you
Diode The high voltage diode converts the A/C power output of the transformer to D/C, doubling the voltage to nearly 5,000 volts. This high voltage powers the magnetron which emits the energy that cooks the food. If the diode burns out, a lower A/C voltage reaches the magnetron, which is not sufficient to power the magnetron. When the diode fails it is often visibly burned out. If it appears to be good, it can be tested with a volt-Ohm meter capable of testing diodes. High voltage diodes frequently fail and are one of the most common points of failure in a microwave oven.

Door Switch If the microwave does not heat, one of the door switches might be defective. Microwave ovens normally have three door switches, if any of them fail the microwave does not turn on and does not heat. Check the switches for continuity with an Ohm meter.

Magnetron If the microwave oven doesn't heat the magnetron tube might have burned out. The magnetron uses high voltage, high current DC power to generate the microwave frequency that cooks the food. If the microwave oven is turned on when it is empty this can cause the magnetron to burn out. Once it is burned out it has to be replaced, it's not repairable.
High Voltage Capacitor If the microwave doesn't heat the high voltage capacitor might be defective. The high voltage capacitor works with the high voltage diode to convert the output of the transformer to DC voltage and to double the output voltage. If the capacitor is burned out the entire high voltage circuit stops working properly. The high voltage capacitor can be checked with a special VOM meter which has a capacitance testing capability. Be aware that the high voltage capacitor can retain a charge of more than 3,000 volts and can injure or kill a person if not handled properly. Only trained technicians should perform this type of testing.

High Voltage Transformer If the microwave does not heat, the high voltage transformer might be burned out. Microwave ovens produce a very high voltage in order to power the magnetron antenna, which emits the energy that cooks the food.

Thermal Fuse If the microwave doesn't heat the thermal fuse may have blown. It can be tested for continuity. Watch our fuse testing video for more information.

Thermoprotector If the microwave doesn't heat the thermoprotector may have tripped. This is a safety device to prevent the microwave from overheating. It can be tested for continuity to see if it's blown.

Main Control Board If the microwave doesn't heat the main control board may be defective. This is not common. When a microwave doesn't heat the problem is usually within the high voltage circuit; either the high voltage capacitor, diode, transformer or magnetron.
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Oct 02, 2012 | Sharp Microwave Ovens

1 Answer

Maytag microwave problem everything seemingly works but does not heat. Help


see this causes and fix it. God bless you
Diode The high voltage diode converts the A/C power output of the transformer to D/C, doubling the voltage to nearly 5,000 volts. This high voltage powers the magnetron which emits the energy that cooks the food. If the diode burns out, a lower A/C voltage reaches the magnetron, which is not sufficient to power the magnetron. When the diode fails it is often visibly burned out. If it appears to be good, it can be tested with a volt-Ohm meter capable of testing diodes. High voltage diodes frequently fail and are one of the most common points of failure in a microwave oven.

Door Switch If the microwave does not heat, one of the door switches might be defective. Microwave ovens normally have three door switches, if any of them fail the microwave does not turn on and does not heat. Check the switches for continuity with an Ohm meter.

Magnetron If the microwave oven doesn't heat the magnetron tube might have burned out. The magnetron uses high voltage, high current DC power to generate the microwave frequency that cooks the food. If the microwave oven is turned on when it is empty this can cause the magnetron to burn out. Once it is burned out it has to be replaced, it's not repairable.

High Voltage Capacitor If the microwave doesn't heat the high voltage capacitor might be defective. The high voltage capacitor works with the high voltage diode to convert the output of the transformer to DC voltage and to double the output voltage. If the capacitor is burned out the entire high voltage circuit stops working properly. The high voltage capacitor can be checked with a special VOM meter which has a capacitance testing capability. Be aware that the high voltage capacitor can retain a charge of more than 3,000 volts and can injure or kill a person if not handled properly. Only trained technicians should perform this type of testing.

High Voltage Transformer If the microwave does not heat, the high voltage transformer might be burned out. Microwave ovens produce a very high voltage in order to power the magnetron antenna, which emits the energy that cooks the food.

Thermal Fuse If the microwave doesn't heat the thermal fuse may have blown. It can be tested for continuity. Watch our fuse testing video for more information.
Thermoprotector If the microwave doesn't heat the thermoprotector may have tripped. This is a safety device to prevent the microwave from overheating. It can be tested for continuity to see if it's blown.

Main Control Board If the microwave doesn't heat the main control board may be defective. This is not common. When a microwave doesn't heat the problem is usually within the high voltage circuit; either the high voltage capacitor, diode, transformer or magnetron.


10_1_2012_10_10_06_pm.gif10_1_2012_10_10_34_pm.jpg

Oct 01, 2012 | Maytag MMV4205 Microwave Oven

1 Answer

Mixer not working and board getting hot


There is likely a voltage regulator or a diode burned out in the vicinity of the power supply. If you have the schematic, start at the power supply and work through the circuit to the I.C. Also look up the pinout on the internet for that I.C. With the power on test the voltages at each pin on the I.C. You should not have supply voltage readings on any of the signal pins. This is an indication that the I.C. is also burned out. Use a volt ohm meter with a D.C. voltage setting. Also hopefully your meter should have a diode test function. If not you can still test them with the resistance test function.Here is a link to an explanation:http://www.elexp.com/t_test.htm I hope this helps.

Mar 03, 2010 | Vestax Pmc 280 DJ Mixer

1 Answer

Internal fuse on cambridge a1 mk3 has blown and when replaced,blew instantly??


When the fuse blows suspect an overload in either the power supply or Main Amp section.
Check for burnt/damage parts first!
Power Supply faults that will blow the fuse are: Transformer, Rectifier, Voltage Regulator, Large Electrolytic Capictors, Diodes & any other semiconductor connected with it.
Main Power Amp faults are: any semiconductor device on the heatsink.

Jan 04, 2010 | Audio Players & Recorders

1 Answer

I turn the tv on and after a few seconds it shuts itself back off again. At that point I can't turn it back on until I unplug it and plug it back in. However, when I turn it back on it will again turn...


Possibly the main Power Regulator is damaged!!!

Open the case, then look for anything that burned out, replace it!!!

If still won't start, you need a multimeter, soldering iron, try locate output diode on power regulator board, then measure the voltages, it has 3-4 type of voltages;
first diode it should around 115V-130 V DC.
Second diode it should around 24 V DC.
Third diode it should around 11-16 V DC.
Fourth ( if exist), check diode and should around 5 V DC.

The problems usually start on second diode, if persist, follow the circuit board.

Oct 18, 2009 | Sharp 27K-S100 TV

1 Answer

Marantz PM66SE AMP: The fuse in the board is burned after a few seconds when the power is on. COuld you please help me to diagonose the issue? Thanks a lot!


You have an overload in the power supply or audio output stages. Look around sometimes a part may be burnt, have a hole in it etc... In the power supply it could be a diode, the large Elec Caps, Bridge Rectifier, Voltage Regulator. In the Audio Output, one or more large transistors, on the heatsink, or an IC if it uses one.

Oct 12, 2009 | Audio Players & Recorders

1 Answer

I have a jukebox that stopped playing radio, cd and cassette? any recommendation on where or how to fix it?


This is a power supply problem. First check for a blown fuse where the AC cord comes in to the circuit board. Try to put another fuse if its blown with same rating. If it blow again then there is a semicondutor that has failed. Semiconductors fail by conducting current on both direction therefore creating a short. Example of a semiconductors are: diodes, transistors, regulator packages, chips etc. Transsistor would have three pins. Diodes are usually cylindrical shape with a color band on one end, and has pin on both ends. Chips, and are also semiconductors, but rarely goes out. Thats because most chips run on very small current. The rule of thumb is the bigger a semiconductor device, the more current it operates on, and therefore more likely to naturally fail. So if you were to test one of these components. You would use a multimeter, turn the dial to select "diode" and do a go/no-go test. Meaning you would see if there is contituity on only one direction. Now in that mode, the meter actually display "voltage drop" semiconductors usually have 0.4 voltage drop across one direction, give or take a few fraction of a volt. The other direction there is almost no voltage drop. Thats because it is not suppose to conduct the other way. If you suspect a shorted out diode, or transistor in the power supply, take it out of the circuit, using a soldering iron, then measure it one more time to confirm. If it was bad, note the number on it,and hopefully it is still readable, and replace with the same kind, or one the has the same characteristic.

Jun 29, 2009 | RCA Spirit Of St. Louis Radio/Cassette/CD...

4 Answers

Ziener diode


Yes, Zener diodes can work both on forward and reverse biasing. The primary difference between a zener diode and the ordinary junction diode is it is designed specifically to operate with a reverse bias voltage that is high enough to cause the the device to breakdown and conduct a high reverse current. Hope this answers your question and provides you with some help. If you need further assistance please let me know.

If you do not mind, would you please rate my help. I would very much appreciate it. Thanks

Dec 08, 2008 | HP Pavilion dv6000z Notebook

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