RESISTOR TESTING

-

1- Visual inspection: Checks for missing or any burning on resistance.

 

2- Using Digital Multimeter: You can check the resistor resistance by selecting the ohm range in the digital multimeter, If the resistor is in circuit, you will generally have to remove the resistor so you are testing only the resistor value and not the other components in the circuit.


 
Connect test probes across the two points of the resistor as shown in the photo, polarity isn’t important, value of resistance shown is 9.86 kΩ.
Note: All resistors have a specific tolerance rating. The tolerance rating is marked by a color band on the end of the resistor’s body, normally the band is gold indicating 5 % tolerance. If the tolerance band is silver, then the rating is 10 %.

How to test SMD Resistors:

Because of the small size of SMD resistors, there is often not room for the traditional color band code to be printed on them. Therefore, new resistor SMD codes were developed. The most commonly seen codes are the three and four-digit system and an Electronic Industries Alliance (EIA) system called EIA-96.

 

Let’s take an example of a 3 and 4 Digit System: In this system the first two or three digits indicate the numerical resistance value of the resistor and the last digit gives a multiplier. The number of the last digit indicates the power of ten by which to multiply the given resistor value. Here are some examples of values under this system:


 

Select Ohms range and place your test probes across the two points of the SMD resistance as shown in the photo. this SMD resistance belongs to the system of coding 3-4 Digits System by use this system coding we’ll find value of resistance: 561 = 560 ohms or 0.560 k ohms.

 

This resistance is 0 ohm (zero-ohm resistance) it functions as a fuse.

 

The multimeter show OL that means bad resistance.

Once the SMD resistors are burnt, the only way to find out the value is through a schematic diagram or comparison from the same motherboard model.
Now we take a look at another popular coding method the EIA 96 System this system is based on a 96 series of preferred values.

 

 
The SMD resistor coding is the same as the SMD network resistor. An SMD network resistor consists of few resistors that have same ohms value in a single package.

 

The testing method is the same as a normal type of resistor, Calculate the SMD resistor code first, above example we have SMD network resistor marking on it number 510 its means 51k ohms.
Then place the test probes across the two ends of the SMD network resistor and read the result directly from the digital meter LCD display.



Comments

Post a Comment

Popular Post

My Printer Not Connecting

-
Image
 If you are having an issue with installing a printer or getting other issues dealing with a printer or printer setup on the computer, try this troubleshooter.  If a step doesn't apply, skip to next step  1. Turn computer off  2. Turn printer off 3. Disconnect power to printer for 2 minutes  4. Turn printer back on  5. Wait one minute  6. Make sure all connections are good  7. If your printer has both parallel and USB connectors, only have one of the two connected and not both. The USB is faster. (most new systems do not have parallel connections)  8. Turn computer back on  9. Make sure the printer has ink  10. Is the printer networked? If so is it connected to the network via computer or router. If it is connected via a computer and the computer is off, the other systems will not see it.  11. Make sure the dependencies to the print spool is started  12. Check the manufacturer of the printer to see if there is a newer driv...
Read more

INTRODUCTION TO CHIP-LEVEL TECHNOLOGY

-
Image
Chapter 1: Introduction to Chip-Level Technology     1.1 What is Chip-Level Technology?   Explanation of chip-level technology: Delving into the microscopic world of electronic components and circuits. How chip-level technicians work at the heart of devices to diagnose and repair intricate issues.  1.2 Importance of Chip-Level Expertise   Highlighting the significance of chip-level technicians in repairing complex electronic devices. Examples of devices where chip-level expertise is crucial: smartphones, laptops, gaming consoles, and more Chapter 2: Basics of Electronic Components   2.1 Understanding Electronic Components Introduction to fundamental components: resistors, capacitors, diodes, transistors, and integrated circuits (ICs). How components combine to create circuits, allowing devices to function. 2.2 Role of Components in a Circuit Explanation of how each component contributes to the overall operatio...
Read more

HARDWARE TECHNICIAN

-
Image
   As a Laptop technician, you must understand a basic rule of business, time is money.      Whether you are boss or work for someone else, the ability to identify and isolate a Laptop fault quickly and decisively is very important to the success of your business. It requires some common sense, and a little bit of focus. It also requires an understanding of the troubleshooting process, and reliable plan of action. Even though the number of Laptop configuration and setups are virtually unlimited, the methodology used to approach each repair is always about the same. This introduction is intended to isolate the concepts of basic troubleshooting and show you how to apply basic laptop repair steps that will help you narrow the problem down before you even take a screwdriver to the Laptop. By applying a constant technique. You can safe precious time from every laptop repair. The General Troubleshooting Steps Regardless of how your particular Laptop might be, a depend...
Read more

IP Address: internet protocol

-
Image
   What is an IP address?     An IP (Internet Protocol) address is a unique numerical label assigned to each device connected to a computer network that uses the Internet Protocol for communication.     It serves two main functions: identifying the host or network interface and providing the location of the device in the network. Types of IP addresses:     IPv4: This is the most common type of IP address used today. It consists of four sets of numbers separated by periods (e.g., 192.168.0.1). IPv4 allows for approximately 4.3 billion unique addresses.     IPv6: With the increasing number of connected devices, IPv6 was introduced to address the depletion of IPv4 addresses. It uses eight sets of numbers separated by colons (e.g., 2001:0db8:85a3:0000:0000:8a2e:0370:7334). IPv6 provides a significantly larger address space. How IP addresses work:     When a device wants to communicate with a...
Read more

How to Hack WiFi Password: Guide to Crack Wi-Fi Network

-
What is Cybercrime? Cybercrime is defined as an unlawful action against any person using a computer, its systems, and its online or offline applications. It occurs when information technology is used to commit or cover an offense. However, the act is only considered Cybercrime if it is intentional and not accidental. In this tutorial, you will learn: What is Cybercrime? Example of Cybercrime Cybercrime Attack Types Cyber Crime Tools Example of Cybercrime Here, are some most commonly occurring Cybercrimes: The fraud did by manipulating computer network Unauthorized access to or modification of data or application Intellectual property theft that includes software piracy Industrial spying and access to or theft of computer materials Writing or spreading computer viruses or malware Digitally distributing child pornography Cybercrime Attack Types Cybercrime can attack in various ways. Here, is some most common cybercrime attack mode: Hacking: It is an act...
Read more
-
Image
j BIOS (Basic Input/Output System) is an essential firmware embedded in a computer's motherboard that initializes hardware components and enables the operating system to boot. Sometimes, updating or reprogramming the BIOS becomes necessary to fix compatibility issues, add new features, or enhance system performance. This comprehensive guide will walk you through the process of BIOS reprogramming, covering the necessary steps and precautions to ensure a successful update. Understand the Purpose of BIOS Reprogramming : Before proceeding with BIOS reprogramming, it's crucial to understand why you need to update or reprogram it. Common reasons include resolving hardware compatibility issues, improving system stability, fixing security vulnerabilities, enabling new features, or supporting updated hardware. Make sure to identify the specific need for reprogramming to avoid unnecessary updates that could potentially cause problems. Research and Gather Necessary Materials : Begin by re...
Read more

An Introduction to IT Chiplevel Repair: Unveiling the Inner Workings of Modern Devices

-
Image
  In the fast-paced world of technology, where devices are becoming more intricate and compact, the need for skilled professionals capable of delving into the core components of electronics has grown exponentially. Chiplevel repair and chiplevel engineering have emerged as crucial disciplines, allowing technicians to diagnose and mend devices at a microscopic level. In this article, we'll explore the fundamentals of chiplevel repair, its significance in the realm of IT, and how it contributes to the functioning of devices we rely on daily. What is Chiplevel Repair?   Chiplevel repair , often referred to as board-level repair , is a specialized field within electronics repair that focuses on identifying and resolving issues at the individual component level of a device's circuit board. Unlike traditional repair methods that involve simply replacing faulty parts, chiplevel repair involves diagnosing and fixing problems within integrated circuits, microchips, and other intricat...
Read more