POWER Repair Guide

Lecture



Power Classification Type
 ACDC: Rectification.
 DCDC: DC Converter.
 DCAC: Inverter.
 ACAC: AC Converter.

DCDC: DC Converter.
@ DC Converter  Linear & Switch
@ IC in Power circuit, generally call “RegulatorPOWER Repair Guide

POWER Repair Guide

POWER Repair Guide

POWER Repair Guide

Voltage Mode Control
– Single Control Loop
– No Current Sense
Resistor
– Better Noise
Immunity
– Less Sensitive to
Layout

Current Mode Control
– Immediate Response
to Changes in Input
Voltage
– Inherent Current
Limiting

POWER Repair Guide

laptop power supply troubleshooting flowchart

POWER Repair Guide

POWER Repair Guide

created: 2019-11-24
updated: 2026-03-10
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Lectures and tutorial on "Diagnostics, maintenance and repair of electronic and radio equipment"

Terms: Diagnostics, maintenance and repair of electronic and radio equipment

Technical diagnostics of radio electronic equipment
Repair of electronic equipment
Development of structural and functional schemes REU
Development of a diagnostic and troubleshooting algorithm.
Fault finding algorithm
Checking radio elements Diodes transistors capacitors thermistors and optocouplers
TECHNICAL MAINTENANCE OF COMPUTER SYSTEMS KEY NOTIONS AND DEFINITIONS
1.1. TYPICAL SYSTEM OF TECHNICAL PREVENTIVE MAINTENANCE AND REPAIR.
1.2. PERIODICITY AND ORGANIZATION OF WORKS. MATERIAL AND TECHNICAL SUPPORT.
2.1. SERVICE EQUIPMENT
2.2. TYPES OF CONFLICTS WHEN INSTALLING EQUIPMENT, METHODS OF THEIR ELIMINATION
2.3. TYPES OF FAILURES, FEATURES OF THEIR APPEARANCE AND DETECTION
2.4. MODERNIZATION AND CONFIGURING CTS
3.1. TROUBLESHOOTING SYSTEM SYSTEM 3.1.1. FEATURES OF THE TYPICAL SCHEME OF BP PC. MAIN CRITERIA FOR POWER SUPPLY DIAGNOSTICS.
3.1.2. TROUBLES OF THE POWER SUPPLY UNITS, THEIR SIGNS, CAUSES AND ELIMINATION METHODS
3.1.3. TROUBLESHOOTING ALGORITHMS FOR PC POWER SUPPLY
3.1.4. MAIN MALFUNCTIONS OF THE SYSTEMBOARD, THEIR SIGNS, CAUSES AND ELIMINATION METHODS
3.1.5 CPU CPU PROBLEMS, THEIR SIGNS AND ELIMINATION METHODS
3.1.6. FEATURES OF THE DESIGN OF MODERN NZHMD, TYPES OF DEFECTS OF THE MAGNETIC DISK OF NZHMD
3.1.7. MALFUNCTIONS OF THE HARDWARE PART OF HDD THEIR CHARACTER OF MANIFESTATION, TECHNIQUE OF THEIR ELIMINATION
3.1.8. file system type comparison. FAULTS OF THE FILE SYSTEM OF NZHMD AND METHODS OF THEIR ELIMINATION.
3.1.9. TYPICAL OS FAULTS, THEIR SEARCH AND ELIMINATION ALGORITHM
3.1.10 PROBLEMS OF HDD THEREOF THEIR CHARACTER OF MANIFESTATION, TECHNIQUE OF THEIR ELIMINATION
3.1.11 PROBLEMS OF NODE THEIR CHARACTER OF MANIFESTATION, TECHNIQUE OF THEIR ELIMINATION
3.2.1 BASIC PRINCIPLES OF BUILDING MODERN MONITORS
3.2.2 PRECAUTIONS FOR CARRYING OUT REPAIR WORKS
3.2.3 CAUSES OF TROUBLESHOOTING IN THE VM
3.2.4 GENERAL PRINCIPLES OF VM REPAIR
3.2.5 FEATURES OF VM POWER SUPPLY DEVICE, REPAIR METHOD
3.2.6 FEATURES OF THE DEVICE CONTROL UNIT OF THE VM. REPAIR METHOD OF UU
3.2.7 FEATURES OF THE DEVICE OF THE NODE OF TREATMENT OF THE VIDEO SIGNAL VM. REPAIR PROCEDURE OF VIDEO SIGNAL VIDEO TREATMENT
3.2.8 CRT CONNECTION CIRCUIT AND ITS REPAIR METHOD
3.2.9. FEATURES OF THE DEVICE OF THE KNOT OF THE LINE SCAN OF THE VM. METHOD OF REPAIR NODE SCREEN BLOCK VM
3.2.10. PECULIARITIES OF THE DEVICE OF A PERSONNEL SCAN. REPAIR PROCEDURE OF PERSONNEL SCANNING OF VM
3.2.11. PRINCIPLE OF CONSTRUCTION AND BASIC TYPES OF LCD LCD MONITORS AND THEIR REPAIR METHODOLOGY
3.2.12 MONITOR ADJUSTMENT
3.3.1 STRUCTURAL SCHEME OF MATTIC PRINTER AND ITS FEATURES. TROUBLESHOOTING AND REPAIRING THE MATRIX PRINTER
3.3.2. Block diagram of an inkjet printer and its features. Troubleshooting and Repairing an Inkjet Printer
3.3.3. STRUCTURAL SCHEME OF LASER PRINTER AND ITS FEATURES. DIAGNOSTICS OF LASER PRINTER FAULTS
3.4. TROUBLESHOOTING FOR OTHER PERIPHERAL EQUIPMENT 3.4.1. DIAGNOSTICS AND SERVICE DEVICES INPUT - KEYBOARD AND MANIPULATOR TYPE MOUSE
3.4.2. DIAGNOSTICS AND SERVICE FLASH - DRIVE
3.5. NETWORK EQUIPMENT TROUBLESHOOTING
TYPICAL SYSTEM UTILIZATION OF FAULT ELEMENTS
Troubleshooting. Methods of troubleshooting As well as the reasons for the inoperability of electronic devices.
Technological scheme of repair of electronic equipment
General repair issues
3. Description of models of objects repair
Malfunctions of active and passive radio radio elements
6. Soldering of radio radio elements
Repair laptop filled with water, tea, coffee, carbonated drinks
Diagnostics repair and flowchart of problems with computer sound and speakers
The hard disk makes sounds: Check HDD for errors and bad sectors. Symptoms of problems with the hard disk
HDD status and SMART technology and failure prediction. G-sensor in HDD. Types of malfunctions HDD. Reliability of hard drives: MTBF, AFR, UER. Factors affecting reliability
MTBF, or mean time to failure. How to predict a hard drive crash? MTBF, MTBR, MTTR, MTTF, MTBDE and FIT
PREVENTION, CLEANING COOLING SYSTEM. TROUBLESHOOTING THE LAPTOP.
Computer beeps (BIOS audio decoding)
Refrigerator repair. Fault diagnosis
TV malfunctions - causes and methods of elimination, block diagram and principle of TV operation
Diagnostics and troubleshooting phones. Block diagram and principle of operation of a GSM telephone
Method FMEA, Analysis of the types and effects of potential defects
FTA. Failure tree as a structural analysis method
General issues of computer repair, general concept and types of maintenance
Classification of errors, failures, failures and malfunctions in electrical equipment
The structure of the system of automatic control and diagnostics of computers
Common computer errors
Hardware control of the computer. fundamentals of building hardware control
Error Detection Codes
Arithmetic logic operations
Cyclic codes
Faulty ports on the motherboard (COM LPT USB)
PCMCIA Repair Guide
VGA Repair Guide
LCD Repair Guide
BIOS Repair Guide
MEMORY Repair Guide
POST CODE Repair Guide
New Card Repair Guide
POWER Repair Guide
CHARGE Repair Guide - battery power circuits on a laptop
Diagnostics and repair of DVD, CD Blu-ray drive, block diagram
Checking the serviceability of the PWM converter
Reballing technology - replacing solder balls, under electronic BGA components
The influence of external factors on the reliability of electronic equipment and components - heat, cold, moisture, radiation, the degradation of semiconductors
Диагностика неисправностей видеокарты и ремонт
Design and repair of uninterruptible power supply company ARS
Find, diagnose and troubleshoot an ATA disk