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Transistors measures Hi, I've tried to measure them (two small rectangular ones) and they have exact values - 1.214 in one side and .235 in another.... each of them... The numbers on them are D444 and BE5D29... Thanks

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The two are in good conditions

Posted on Aug 13, 2008

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Sharp 21 inch primo, good the fly back,horizontal,vertical,but automatic shutoff i check the voltage measurement. high supply


Try to check high valued resistors small silicon transistor or leaking zener diode in the main board near the hooked up wire connecting to the crt board,maybe the problems are there....Dods

Sep 18, 2013 | Televison & Video

1 Answer

Formula to convert m/gal to l/100km


One mile is about 1.6 kilometers. A gallon is about 3.8 liters.

To convert from one to the other, divide 235 by the value.

Oct 15, 2012 | Cars & Trucks

1 Answer

My bass amplifier requires a ceramic fuse T10H250V. Where can I find one exactly like it?


hi,

Fuse breaks when it has succeeded in limiting further damage.


Check for other possible shorted electrical and electronic

components.


• Could be drive transistor , output transistor or both on the main amp.

But check for power supply and in the preamps also.


• Measure supply voltages,

• Check DC offset voltage

• Check idling current (main amp)

Isolate , and trace afterwards.

Aug 22, 2012 | Behringer Audio Players & Recorders

1 Answer

Hello, I've got a Denon AVR-2106 dropping into standby every time I turn it on. I know this is fairly regular problem, and I've seen plenty of posts here suggesting things to look at to diagnose...


check the power supply for the micro controller \ logic.

5 or 3.3 Volt IC's

And check with AC measurement too ( try to measure AC ripple )
Could very well be dry electrolytic capacitors with excessive ESR.

Ed

Mar 14, 2017 | Denon AVR-2106 Receiver

1 Answer

Iv put two of the same record on each deck and set them to 0% and I have to adjust them to keep them in sync


The problem is the "tolerance" of the electronic components that go into all electronic devices - your turntables included. Take a simple resistor. Buy 2 (or even 2 dozen) of the same value and measure them with the same meter. I bet you'll see to different values displayed. Next, use a different meter to measure the same resistors - I bet they display yet different values. You can do the same thing with 2 transistors, capacitors - you name it. It's not limited to just electronics, either.

Manufacturing processes have not managed to hit the 100% predictability mark yet. As a result, no two parts produced are exactly the same. No two loads of raw materials are the same - so it is going to be practically impossible for the finished output to be the same. Sure, they've come close - but I doubt we'll ever see the kind of similarity between supposed "identical" devices that you're looking to find.

You may find that "sweet spot" of pitch on 2, 3 or even 50 turntables where they play exactly in sync, but the indicator dials will not be in the same exact spot.

I hope this helps.

Dec 28, 2010 | Vestax Pdx2000 Direct Drive Turntable...

1 Answer

I am looking for a porta potti for a small space under a rocknroll bed in a VW camper - I have been told I need a 235 but I can't see one?


I have just come across the same problem. Looking at Porta Potti measurements, the 335 is the closest to the 235. Height of the 335 is half a cm more at 30.5cm. Depth is a couple of cm more at 38.1cm compared to 36cm for the 235, but width of the 335 is less at 34.3cm compared to 35cm for the 235 model. I was told the 345 replaced the 235...but the height is more and won't fit under my bench seat. 345 measurements are H. 34.5cm D.41.9cm W.38.1cm.

Sep 26, 2010 | Thetford Porta Potti

1 Answer

How do I adjust the output bias current on a


Hi davoid
Connect your voltmeter`s probes on the "emitter" of the two output transistor, or in other words the measurement is made between the emitters of the output transistors.
Turn on the amp but do not let the output get hot.
If only one side was repaired then you could use the good side and measure its biais as reference. Or
Adjust the biais at between .007 to .014 volt, so it is fair to say that at .010 volt you would be in the range.
repeat the same for the other side if needed.
Hope this help and good luck

Mar 16, 2010 | Audio Players & Recorders

1 Answer

Power suppy akai lct2715 componant breakdown


Hi Phil,
The value R11 is 8.2K ohms. It's surface mount but I'm not sure about the package size. You can measure one that looks like the same size as the missing resistor. Measure the width and length in inches with a digital caliper if available.
Use this sample to decode the package size:
0805 (2012 metric) : 0.08" × 0.05" (2.0 mm × 1.25 mm) Typical power rating for resistors 1/10 or 1/8 watt.

Dec 29, 2009 | Akai LCT2716 27 in. LCD Television

1 Answer

Schematic drawing of Adcom GFA-5300/how to check driver circuits


The driver circuits should be just before the outputs in the circuitry. The easiest way to check this circuit is to remove the outputs and turn on the unit. Measure each of the transistor pads relativce to ground for DC voltage. You should see the following: B+,0.6V (or 1.1V), and 0V on one transistor and negative values on its compliment. If you have questions, measure the pads and post the measurements here. In some cases the output transistor needs to be in place to get the values above, so if yours don't measure that way, just post what you get and we'll continue from there.

Dan

Dec 08, 2009 | Adcom GFA-5300 2-Channel Amplifier

1 Answer

My TP100 snare pad is very glitchy. Often when I hit it, it makes no sound at all, or it misses hits. I suspect something is wrong with the small sensitivity dial (not the big red dial), because the...


The dial could have a desoldered pin or oxydized slider contacts. Try to resolder the pins, but if that doesn't solve it then you would need to disassemble and clean the internal slide contacts on the dial which can be a bit difficult, so the alternative is to replace the dial if you can find a spare one.

To bypass the dial (with fixed resistances) you need to know the resistance at each side of the dial when it is in the position that suits your needs (connect the snare to a working input, set the sensitivity as needed, mark the position of the dial).

The resistance can be measured with an ohm meter.
To be sure that the measuring will be accurate, it is ok to remove the dial from the circuit board (adjacent components may affect the measured value).
You should do the measuring on a dial that is good.

After you've removed the dial, set it to the position that you marked previously.

Measure the resistance between left and middle pin of the dial - this will be the value of the fixed resistor which you need to connect to the left and middle hole on the circuit board.
Now measure the resistance between middle and right pin on the dial - this will be the value of the fixed resistor which will be connected to the middle and right hole on the circuit board.

Now you need to get resistors which have the values that you've measured and solder them in place of a bad dial.

It is likely that the measured value will differ from the standard fixed resistor values. To achieve the exact measured value, you can connect two or more fixed resistors in series, just make sure that the added value of the fixed resistors for each side is the same as the measured value on each side of the dial.

Now you need to solder the fixed resistors to the circuit board and the modification is complete.

If you actually decide to do this modification and you're unsure about anything, just post me some feedback, i'll be glad to help.

Anyway, hopefully it is just a desoldered pin that you need to reflux.

Regards,

Triarcuate

Oct 10, 2009 | Yamaha Dtxpress Iv Special Electronic Drum...

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