Fixing the damage is only active speaker hum.

Fixing the damage is only active speaker hum.

Assalamu'alaikum warohmatullohi wabarokatuh.

 Welcome for your first time visiting this blog, and welcome to those of you who are already back often or even make this blog as main source of information in terms of electricity or any electronics. At this time the chances Maswar service will share experiences on active service as speakers in turn only hum high notes without any sound from the sound source or VCD or otherwise.

So that Maswar service is meant by high pitch hum reads "nguuk" instead of "ngguungng." first step before opening the back cover of my first open the front cover or cover the loud speaker.Try leaves turn and it looks like the speaker is interested to inside .That condition unusual because there is a DC voltage to the output speaker. Just open the back cover and pull out the box of the power amplifier in the box. It was not easy just to pull it because it was cooler or the heat zink in box screw on, and to take it off is also quite difficult because it keyed . With the position using the screwdriver short stemmed finally managed to removed the engine.  

Based on observations in mind that the final amplifier active speaker using TIP31 and TIP32 transistor pair, which according to preliminary information is used to learn electronics power 60 watts even though the sticker says 2400 watt. Shown  mica or plastic insulator of the transistor TIP 32 bit shrunken former signifies exposed to excess heat. And after scrutiny was already sticky with transistors and the heat zink. Because do not want to just guess the origin Maswar service measurements. And right when the detachable speaker output wires on right ON measurable DC voltage on the cable. Then the transistors are measured and found to TIP 32 transistor and a transistor in the front short and 1 ohm resistor burned .

The next step is to replace all three components of a second trial and was done degan touch input and reads "duut" signifies power works. Then put the cooler and tried again by giving the source of the sound and it has been okay. final step is to restore power amplifier to first position, clean up box cover and front cover. Degan try tasters songs from Didi Kempot especially fitting song Mak Plong while drink coffee and eating bananas fried liver Maswar mak plong.Lebih Service also feels better when the owner has been issued a blue-blue sheets of her purse, added plong.

Similarly to Msawar service for on this occasion may be useful. Ameen.

 Wassalam

Know potentiometer.

Know potentiometer.

Assalamu'alaikum warohmatullohi wabarokatuh.

Greeting visitors elektronics.Dear visitors of Maswar services blog ,lets conference and re-learn this together. In this occasion we will discuss about the potentiometer.

Potentiometers are three-terminal resistor with a sliding connection that forms an adjustable voltage divider. If only two terminals are used (one fixed terminal and the terminal sliding), potentiometer acts as a variable resistor whose value is barriers can be changed. Potentiometers are commonly used to control electronic circuits such as controllers voice (tone control) on the amplifier.

Potentiometer sections consist of:

-Resistive Element -Body -Sweeper (wiper)

-axis

-first fixed connection.

-sweeper connection.

-Ring.

-Bolts .

-second fixed-connection.

Potentiometers are rarely used for controlling high power (more than 1 Watt) directly. Potentiometer is used to adjust the level of the analog signal (eg voice control on audio devices), and as control inputs for electronic circuits. For example, a light dimmer uses a potentiometer for switching control TRIAC, so indirectly control the brightness of the lights. potentiometer is used as a volume control sometimes comes with an integrated switch, thus opening the switch when the potentiometer wiper is at the lowest position.

Potentiometer Construction.

A potentiometer is usually made ​​of a semi-circular resistive element with a sliding connection (sweeper). Resistive element, with terminals at one or both ends, is flat or angled, and is usually made ​​of graphite, although other materials that might also be used instead. Sweeper is connected to the other terminal. In panel potentiometer, wiper terminal is usually located in the middle of the second terminal resistive element. For a single round potentiometer, sweeper usually moves less than one full turn along the contact. Potentiometer "double-loop" also exists, may be a torsion the resistive element and sweeper may move 10, 20, or more rounds to complete the cycle.

However, potentiometers double round selection is usually made ​​of the same elements with conventional resistive resistors single round, while sweeper driven via a worm gear. Besides graphite, materials used to make the resistive element is a resistance wire, plastic particles and carbon ceramic-metal mixture called cermet. In the linear slide potentiometer, a sliding control is used instead of rotary controls. Resistive element is a square path, not the path of the semi-circumference as the rotary potentiometer.

Potentiometer type of device is often used in adjusting the graph, such as equalizer graph. Because the openings are large enough to sweeper and knobs, potentiometer has a lower reliability when used in a bad neighborhood. potentiometer available with linear or logarithmic relationship between the sweeper position and the resulting resistance (potentiometer laws or "tapers"). maker potentiometer conductive pathways using conductive polymer resistor pastes containing resins and polymers, solvents, lubricants and carbon. Paths are made ​​by printing on the substrate surface Papua phenolic and baking it in the oven. Throughout the roasting process removes the solvent and allow the pasta to become a solid polymer. This process produces a durable track with stable resistance during operation.

The linear potentiometer.

The linear potentiometer has a resistive element with constant cross-section, resulting in devices with a resistance between the wiper terminal one proportional to the distance between the two .. Linear potentiometer is used if desired proportional relation between the rotation axis of the division ratio of the potentiometer, for example, controllers are used to adjust the central point of the oscilloscope screen.

The logarithmic potentiometer.

The logarithmic potentiometer has a resistive element which gets narrowed or made ​​of a material that has a resistivity varies. This gives the device resistance is a logarithmic function of the angle of the potentiometer shaft. majority of log potentiometer (especially cheap) is actually not really logarithmic, but use two linear resistive path to mimic the logarithmic law. Log potentiometer can also be made ​​using a linear potentiometer and an external resistor. Potentiometer truly logarithmic relatively very expensive. Potentiometer logarithmic often used in audio devices, especially as the volume control.

Potentiometer high power wire windings. Potentiometer of any type can be used also as a rheostat.

Rheostat most common way to vary the resistance in a circuit is to use a variable resistor or rheostat. A rheostat is a two-terminal variable resistor and are often designed to handle high currents and voltages. Rheostat is usually made ​​of a resistive wire wrapped to form a toroid coil with the wiper moving at the top of the toroid, touching the coil windings of one coil to the next. Potentiometer three terminals can be used as a two-terminal variable resistor by not using a third terminal. Often unused third terminal connected to the wiper terminal to reduce the resistance fluctuations caused by dirt. Similarly Post by Maswar service on the potentiometer may be understood and can assist in the practice nantinya.Jika want to visit this blog again but do not know the address, it should be noted that This blog address is http://maswarservis1.blogspot.com.

Wassalam.

DVDs and VCDs new generation totally dead.

DVDs and VCDs generation new totally death.

Assalamu, alaikum warohmatullohi wabarokatuh.

Secure see more blog visitors that gentleman. Maswar Service will share their experiences about improving DVD or VCD also the latest, that is a slim box with dead crash total.Para visitor, if you ever have or get a job to improve DVD as I pass on? What do you do the negotiations that? First got the bug like I do the observation and measurement of components, and the measurement and can also be seen directly that there is a fuse for broken glass and visible burned.

I try to replace the fuse and turn off. I took the initiative to expand small cable wire but still dropping and there is even a broken IC. From the incident I finally went to the store to buy electronic components IC. Apparently it ramble on some electronics parts store in town Nganjuk all no one had IC. That there is a network in the form of a VCD regulator for a kit that is so. I had already bought it and took it home.

Having observed evidently park-socket socket is not the same, but Alhamdulillah pins on each of his writings are based on functions. Despite the need to cut and connect a few cables to fit their needs VCD can finally go on with life or normal. According to the owner, VCD dead or damaged after repeatedly PLN power goes out. And such damage is often repeated come to my workshop from different people, and the average is the same as the first, its destruction. If there is damage such direct blunt bold pairs price on the owners of the goods, with no previous record of other complaints. conclusion good DVD or VCD that does not use a transformer or transformers of the cause of death total was presented on the solution that regulator spare is, perhaps often called gacun by friends.

Such postings from Maswar service for this time hopefully can be a reference for all visitors and bring benefits.

Amiin.

Wassalam.

Tips on adjusting the value written by the color code.

Tips on adjusting the value written by the color code.

Third bracelet as a determinant.

Assalamu'alaikum warohmatullohi wabarokatuh.

Do not ever get bored if you want to be. See you again dear blog visitors. Maswar Service believes that the purpose of this study is not just electronics but certainly want to put into practice knowledge in electronics practice, especially in terms of assembling a circuit we will be faced with a list of components and size.

Previously we have studied how to calculate the value of a resistor based on the color of the bracelet. But in the list of components on the PCB or 4700 will not be written but 4K7 ohms, 10000 ohms unwritten but 10K. On the basis of the consideration that these tips delivered.

This only applies to the R-4 bracelets (not metal film).

1 . A third bracelet with silver / silver is valued under one ohm. Example: 0.22 R 0.33 R 0.47 R

2 . R with three color gold bracelet value from 1 R to below 10 R. Example: 1 R 2.2 R 2.7 R 5.6 R 3.9 R 4.7 R Sometimes writing the letter R is placed between two numbers, for example, 2R2, 4R7, 8R9, and so on.

3 . A third bracelet with black start value of 10 R to below 100 R. Example: 10 R, 15 R, 47 R, 56 R, 68 R.

4 . A third bracelet in brown with values ​​from 100 R to below 1 K. Example: 100 R, 220 R, 330 R, 890 R.

5 ​​. A third bracelet red with values ​​from 1 to K and K are the letters of his middle. Example 1 K, 1K5, 2K7, 4K7, etc..

6 . A third bracelet orange with values ​​ranging up to 10K under 100K. Example: 10K, 15K, 33K, 68K, etc..

7 . A third bracelet in yellow with values ​​ranging up to 100K under 1M (Mega ohm). Examples: 100K, 150K, 330K, etc..

8 . A third bracelet in green with a value of 1 Mega ohm more. Example: 1M, 1M2, 2M2, 4M7 etc..

Hopefully this post will make it easier if you shop componen.Remember , bought at electronics stores. Not a shoe store or a cosmetics store. Moreover, in the shop building. Such tips this time may be easier in practice. Ameen. Wassalam.

Service VCD player with damage always show no disc writing.

Service VCD player with damage always show no disc writing.

Assalamu'alaikum warohmatullohi wabarokatuh.

Service VCD player with no disc damage always displays.

Dear visitor, if you ever run into VCD (Video Compact Disc) you often display text on screen display systems no disc? If you like tinkering with electronics goods could not hurt you to read the actual post Maswar service is also very good at this yet. But no need to wait to share the perfect, do not ya ... ya do not. Yes wrote daah. Okay we just started the discussion. Before we accuse the VCD us first consider the first disc (VCD tapes) you, lest already full of scratches. If out of all the tapes have been tried, including newly purchased, but still no disc then only beginning its operations. initial step first open-lid box. Can not be underestimated damage box. Once all the screws and seals removed, do not immediately pulled back or up. But renggangkan left and right side rear lid box with both hands and lift the rear so that the lid makes a quarter circle between the lid and the box makes an angle of 90 ¤ new lid lifted straight up. Many facts hooks on the front panel of the box lid broken as opening forcibly pulled back, if the result can not be closed tightly. -CAUTION HIGH VOLTAGE. Once open the lid we continue the next step, but BEWARE, there is a section of high-voltage air and unprotected. This is the new generation of VCD without using a transformer besar.Yaitu the thin box. So do it carefully and try us not in direct contact with the floor. Ready to begin operation. -On right VCD player, without VCD. What is the point? Maswar service but do not tell was made ​​to argue with those who are around us, this limited knowledge and join us daily for the term mistakenly wrote, to be safe. VCD discs or discs are commonly called VCD tapes. While VCD player which is commonly called vi si on even there is a mention in the course.

Back to the problem, in a state without the tape, press the open / close. By the time the doors close and the mechanical stop, consider the following possibilities.

a.We can hear the rotating mechanical motors.

b.Not reads "Klek" and not part of optic flashing.

c.optic blinking and moving a cassette player for a while.

d.optic flashing and show up and down.

From some of the above possibilities, Maswar Service will review one by one.

* A. mechanical rotating the motor sounds. a.1.Hal this might not meeting mechanical door try to give a little encouragement. Then try with the tape and repeat these steps. Is it normal? If yes what steps to take are: -clean with a small brush or brush both sides of the mechanical parts of the exit / entrance. motorcycle mechanic changed the rubber door. -if there is a spring / per please be shortened so that its pull is stronger. thing that it may be cause.

* B. Not saying "Klek" and not blinking optic.

b.1.masukkan mechanical finger down, when close and stop, press slightly upward so the sound of "Klek". Observe whether the optic flashing? If yes, did the way the attach tape. If normal, then replace only the rubber v belt on the motor of the door.

# C.optic blinking and moving a cassette player for a while.

c.1. direct attach tape and try to wiggle optic cables such as pipes, may be normal for a while and stop again, maybe not. Replace the cable first opticnya. c.2. If the optic cabling has been replaced but still, try to tap-tap first socket, maybe a little loose. c.3. If there is no development, there should be pengetriman on existing trimpot on optics by turning it with a small screwdriver. Find the best position to diepat normal results. This may be necessary to remove the mechanics. C.4. If the above steps did not work, then the final solution is to replace the optic. C.4. If the above steps did not work, then the final solution is to replace the optic.

# D. Optic blinking and moving up and down.

D.1. With symptoms like these can try the steps at point c, but chances are most often it should change the optics.

That experience can convey Maswar service at this time, may bring benefits. Although not necessarily provide the best solution there is no harm if you interact on my facebook. See you in the next post.

Respectfully.

Introduce the AVO meter or multi tester.

Introduce the AVO meter or multi tester.

Assalamu'alaikum warohmatullohi wabarokatuh.

Dear visitor welcome to post Maswar service again with the umpteenth time, and this time we will introduce, of course, for the uninitiated, is about AVO meter or multi-meter or a multitester.

Understanding of AVO meter.

AVO meters derived from word "AVO" and "meter". 'A' means amperes, to measure the electric current. 'V' means the voltage, to measure voltage or voltage. 'O' means ohms, to measure ohms or resistance. Lastly, ie meters or unit of measure. Often referred to as AVO Meter Multimeter or multitester. In general, the notion of AVO meter is a tool to measure current, voltage, both alternating voltage (AC) and direct voltage (DC) and electrical resistance. AVO meter is very important function in any electronics work because it can help get the job done easily and fast, but before using it, the user must know in advance the types of AVO meters and how to use them to avoid mistakes in its use and will cause damage to the AVO meter. Based on the working principle, there are two types of AVO meters, analog meters are AVO (using needle play / moving coil) and AVO digital meters (using a digital display). Both types are of course different from each other, but there are some similarities in terms of operations. Suppose a source of energy required DC battery and probe / cable red and black investigator.

At AVO digital meters, measurement results can be read directly in the form of numbers (digits), while analog displays using AVO meter needle movement to show scale. So as to obtain measurement results, should be read by range or division. AVO analog meters are more commonly used because it is cheaper than the AVO type of digital meters. AVO Meter Analog Meter AVO using the needle as a pointer analog scale. To obtain the measurement results, it should be read by range or division. The accuracy of the measurement results of the AVO analog meter is limited by the width of the scale pointer, vibration of the pointer, the accuracy of printing axle, zero calibration, number of ranges of scale. In measurements using AVO Meter Analog, measurement errors can occur due to errors in observation.

Remarks:

1. Meter Corrector, useful for AVO meter needle set towards zero, while AVO meter will be used by turning the screw to the right or to the left by using a small flat-blade screwdriver.

2. Range Selector Switch is a switch that can be played in accordance with the measure limits the ability of the function used to select the measurement position and size limits.

3. Rotary switch (range selector switch) is the key when we use AVO meters. AVO meter usually consists of four measurement positions, namely:

- Position (Ohm) means AVO Meter serves as an ohmmeter, which consists of three measuring limit: x1; x10, and K ohm.

- Position ACV (Volts AC) means AVO Meter serves as a voltmeter AC is composed of five measuring limit: 10V; 50V; 250V; 500V, and 1000V.

- Position DCV (DC Volts) means AVO meter serves as a DC voltmeter consisting of five measuring limit: 10V; 50V; 250V; 500V, and 1000V .

- Position DC mA (milliampere DC) serves as a means of AVO meters miliamperemeter DC consisting of three measuring limit, namely: 0.25, 25, and 500. , but all four measurement above the limit for a single type of AVO meter with another limit is not necessarily the exact same size. The formula to read it is (BU: BS) X AP limit divided measuring scale limit multiplied numbers appointment.

Similarly Maswar post service this time may sapat understood and if want bertanaya can discuse on face book.

Wassaslam.

How to installing tone control on the amplifier unit.

How to installing tone control on the amplifier unit.

Assalamu'alaikum warohmatullohi wabarokatuh.

Let us talk about the installation or extension AMPLI tone control on our own or amplifier assemblies. Tone control or regulator tone is one of the principal of a power amplifier unit. If no tone control that can not be said of the amplifier, so it can be said as a condition of tone control AMPLI syahnya. Maybe so or What about yaa? This time Maswar Service not specifically discuss a particular tone control, but in general the tone control and how extension. No tone control using the active component in the form of IC is also the use of transistors and they can all be used. There is a need tension - and + wherever there was a need symmetric voltage (-, + and 0) and we adjust the voltage source according to the load demand.

During amplifier with a small force with power working voltage of 12 volts, the voltage of the tone control can diambilkan the same power suply, but if considerable force and power working voltage greater than the voltage amplifier tone control work then need its own power suply or regulators to tone controlnya. As an example of the power amplifier voltage 35 volt wear while working voltage of 12 volts then the tone control can be added to IC 7812 obtained a stable voltage of 12 volts to mensuply tone control.

Connecting the output tone control.

The out put terminal of the tone control is connected to the input of the power amplifier. If possible paste the tone control PCB with PCB power, or make it extension cable as short as possible. It is intended to reduce the effects of the amplifier so buzzing after. If the tone control and power are equally mono or stereo, it was clear to stay connect. But if not the same, for example controlnya mono tone while powernya stereo, then the mono output can install a resistor 2K2 dicabangkan two went into the power input. The value of R is not absolute and can be tailored to their needs.

Connecting input.

Point tone control input connected to the RCA socket if there is no additional network. But if any such additional or other galaxies, then the tone control input connected to the output of the previous network. Installation on the box. If the hole where the distance fits potensio potensio meter layout in PCB can then directly inserted without using cables, but if it is not appropriate and should be put on the cable using the cable skerm and do not run too long. Position the PCB around two centimeters above the box bottom and if possible put a bit away from the transformer. Once installed, the potentiometer is connected to the body between a cable box and digroundkan the body. It is not intended to create buzz too, which is very classical in AMPLI assemblies. Such postings could Maswar service for on this occasion, may be beneficial.

Amiin