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Due to this investigative instinct, I decided to choose the electronics repair industry .. Some simple fault of electronic equipment can be repaired by using only. Electronics Repair Manual - Ebook download as PDF File .pdf), Text File .txt) or Your manual includes a detailed safety article which outlines the steps you. This article explains the difference between a cheap analogue meter, http:// onatnakchiter.cf sends a pulse to the coil and counts the.

Bench Power Supply Repaired.

Consumer Electronics Troubleshooting and Repair Handbook

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Electronic Repair Articles

Click for full information. If any breakdown easily can repair because spares are readily available in the market except micro-controller. Here's the DSO Oscilloscope specifications: Thank you and happy reading stay tuned for my up-coming interesting articles. Basavaraj BM. Posted by Unknown at Email This BlogThis! Older Posts Home. Subscribe to: Posts Atom.

Voltage "B" should be about 0. Voltage "C" should be about half-rail voltage. This allows the transistor to amplify both the positive and negative parts of the waveform.

Voltage "D" should be about v. Voltage "E" should be the battery voltage of 12v. Measuring the current of a circuit will tell you a lot of things.

Executive Summary

If you know the normal current, a high or low current can let you know if the circuit is overloaded or not fully operational.

Current is always measured when the circuit is working i.

The easiest way to measure current is to remove the fuse and take a reading across the fuse-holder. Or remove one lead of the battery or turn the project off, and measure across the switch.

If this is not possible, you will need to remove one end of a component and measure with the two probes in the "opening. You have to get an "opening" so that a current reading can be taken.

This voltage may be too high for the circuit being supplied and the result will be damage.

Measuring current through a resistor Measuring the current of a globe Do NOT measure the CURRENT of a battery by placing the meter directly across the terminals A battery will deliver a very HIGH current and damage the meter Do not measure the "current a battery will deliver" by placing the probes across the terminals.

It will deliver a very high current and damage the meter instantly. There are special battery testing instruments for this purpose. When measuring across an "opening" or "cut," place the red probe on the wire that supplies the voltage and current and the black probe on the other wire.

Electronics Repair Manual

If you are using a Digital Meter, a negative sign "-" will appear on the screen to indicate the probes are around the wrong way. No damage will be caused. It just indicates the probes are connected incorrectly. If any voltage is present, the value of resistance will be incorrect.

In most cases you cannot measure a component while it is in-circuit. This is because the meter is actually measuring a voltage across a component and calling it a "resistance. If any other voltage is present, the meter will produce a false reading. If you are measuring the resistance of a component while still "in circuit," with the power off the reading will be lower than the true reading. Measuring resistance Measuring resistance of a heater via the leads Measuring the resistance of a piece of resistance-wire Measuring the resistance of a resistor Do not measure the "Resistance of a Battery" 1.

Do not measure the "resistance of a battery. It is measured by creating a current-flow and measuring the voltage across the battery. Do not try to measure the resistance of any voltage or any "supply.This is made more complicated by users often reducing the coding ofa chip to a few digits e. Don't Page 6. And a zener diode can be used as an ordinary diode in a circuit with a voltage that is below the zener value. They are available up to about 1,u, at about 50v but their cost is much higher than an electrolytic.

Do this ONLY if it can be done safely and without risk of shock to yourself. If the transistor is connected to a heatsink with a mica sheet mica washer , it can be damaged or cracked and create a short-circuit. Thanks for sharing such a nice blog. Kneel beside the victim and find thepoint where the ribs join atthe bottom ofthe breastbone.

NATHANAEL from Long Beach
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