LER #262 All you need to know about Switch Mode Power Adapters (Wall Warts) To FIX Stuff!.. PART 1. In this video we learn about the Power Supply Circuit Schematics, HOW THEY WORK and WHAT GOES WRONG! We have four practical REPAIR examples. If you want to learn how to repair power adapters, this video, and part two, are exactly what you were looking for.

CHAPTERS
00:00:00 Introduction
00:02:15 Opening Up The Power Supplies
00:13:04 Danger!! Danger!! High Voltage
00:15:01 The Usual Suspects
00:15:32 Practical Repair #1
00:31:59 Basic SMPS Schematic (Pt 1)
00:38:44 Hot Ground
00:40:18 Basic SMPS Schematic (Pt 2)
00:45:20 How Inductors / Transformers Work
00:52:10 Basic SPMS Schematic (Pt 3)
00:53:03 How Analog PWM Works
00:59:35 Basic SMPS Schematic (Pt 4)
01:09:04 Common Faults
01:16:26 Feedback Without OptoIsolator
01:23:19 Practical Repair #2
01:54:52 Practical Repair #3
02:02:42 Testing the PSU Under Load
02:06:04 Practical Repair #4
02:14:25 Epilogue

The ALL YOU NEED TO KNOW Series
Resistors
   • All You Need To Know About RESISTORS ...  

Capacitors
   • All You Need To Know About CAPACITORS...  

Inductors
   • All You Need To Know About INDUCTORS ...  

Diodes
   • All You Need To Know About DIODES To ...  

Zener Diodes
   • All You Need To Know About Zener Diod...  

Transistors
   • All You Need To Know About TRANSISTOR...  

ATX PSU
   • All You Need To Know About ATX PSU To...  

Amplifiers
   • All You Need To Know About AMPLIFIERS...  

MOSFETs
   • All You Need To Know About MOSFETS To...  

Thermal Cameras
   • All You Need To Know About THERMAL IM...  

Power Adapters
Part 1:    • All You Need To Know About Power Adap...  
Part 2:    • All You Need To Know About Power Adap...  

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TEST METERS
Aneng AN8009
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XC6013L CAPACITOR METER
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LCRT4 LOW COST COMPONENT ANALYZER
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FNB58 USB ANALYZER
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PCI POST ANALYZER
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TL460S Plus PCI_E ANALYZER
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TOOLTOP ET829 SCOPE METER
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MULTIMETER PROBE KIT KET05
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OSCILLOSCOPES
FNIRSI 1014D
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FNIRSI DPOX180H
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BENCH PSU
NPS3010W
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SOLDERING
T12 Station with M8 9501 Handle
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M8 9501 HANDLE
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T12BC3 Tip
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SUGON T26D
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QUICK 861DW
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PROS'KIT SS331H
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THERMAL CAMERA
Infiray P2 Pro
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MICROSCOPES
Amscope Optical Microscope (copy)
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ANDONSTAR AD407
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EEPROM Programming
TL866 II+
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CH341A
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1.8V ADAPTER
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CONSUMABLES
NC559ASM FLUX
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DESOLDER BRAID (I use size 8045)
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MECHANIC HXT100 Solder 63:37 (I use 0.6mm)
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ESD11 TWEEZERS
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Richard