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 Opto-Isolator
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*
https://www.youtube.com/watch?v=ae-1qPx9Tww

*Capacitors*
https://www.youtube.com/watch?v=R9slJUqT6Ls

*Inductors*
https://www.youtube.com/watch?v=iOFmrR1E2s8

*Diodes*
https://www.youtube.com/watch?v=YW3jpiQ4xpA

*Zener Diodes*
https://www.youtube.com/watch?v=trjbHhLERic

*Transistors*
https://www.youtube.com/watch?v=GDDwTbM9DLw

*ATX PSU*
https://www.youtube.com/watch?v=GjZtZNssroE

*Amplifiers*
https://www.youtube.com/watch?v=0oWBcTTeMNQ

*MOSFETs*
https://www.youtube.com/watch?v=LNu00nMBaaQ

*Thermal Cameras*
https://www.youtube.com/watch?v=v6Ll2v1brT0

*Power Adapters*
Part 1: https://www.youtube.com/watch?v=IoSaaK71tGY
Part 2: https://www.youtube.com/watch?v=MlDqQpM-VFE

These are affiliate links, you pay the normal price and I make a small commission.

TEST METERS
Aneng AN8009
https://s.click.aliexpress.com/e/_DdWIynN
https://amzn.to/469ZgOS
VC480C+
https://s.click.aliexpress.com/e/_DEYs6ix
https://amzn.to/3Q3LEz7
https://amzn.to/46tmNdo
MESR-100 ESR METER
https://amzn.to/3tiy8hK
https://amzn.to/3RwvejK
https://s.click.aliexpress.com/e/_DmirIEj
XC6013L CAPACITOR METER
https://s.click.aliexpress.com/e/_DmXD5zN
https://amzn.to/3t71Nul
https://amzn.to/3LDdcbO
LCR-T4 LOW COST COMPONENT ANALYZER
https://s.click.aliexpress.com/e/_Dmqdzp5
https://amzn.to/46uzV1R
https://amzn.to/3RHsmAN
FNB58 USB ANALYZER
https://s.click.aliexpress.com/e/_Dmd8TR1
https://amzn.to/3tb1QW8
https://amzn.to/46oMn30
PCI POST ANALYZER
https://s.click.aliexpress.com/e/_DBssfzN
https://amzn.to/46m9Gep
TL460S Plus PCI_E ANALYZER
https://s.click.aliexpress.com/e/_DnBVP1z
https://amzn.to/3ZERvOs
TOOLTOP ET829 SCOPE METER
https://s.click.aliexpress.com/e/_DBwnCGP
MULTIMETER PROBE KIT KET05
https://s.click.aliexpress.com/e/_DE7nAyB
OSCILLOSCOPES
FNIRSI 1014D
https://s.click.aliexpress.com/e/_DEzZMVh
https://amzn.to/3RxMFk1
FNIRSI DPOX180H
https://s.click.aliexpress.com/e/_DBX7auf
https://amzn.to/468oooT
BENCH PSU
NPS3010W
https://s.click.aliexpress.com/e/_DDPJtbD
https://amzn.to/3rxsuIf
SOLDERING
T12 Station with M8 9501 Handle
https://s.click.aliexpress.com/e/_DFVdrD9
https://amzn.to/3FdG8Ul
M8 9501 HANDLE
https://s.click.aliexpress.com/e/_De0ImfH
T12-BC3 Tip
https://s.click.aliexpress.com/e/_DeNDaAF
https://amzn.to/3EUFpqQ
https://amzn.to/3PB8axw
SUGON T26D
https://s.click.aliexpress.com/e/_DFxpWw3
QUICK 861DW
https://s.click.aliexpress.com/e/_DDo9wKj
https://amzn.to/3PBOKZH
https://amzn.to/3RCSqNh
PROS'KIT SS-331H
https://s.click.aliexpress.com/e/_DDo9wKj
THERMAL CAMERA
Infiray P2 Pro
https://s.click.aliexpress.com/e/_Dmuj4a7
https://amzn.to/457PgEb
MICROSCOPES
Amscope Optical Microscope (copy)
https://s.click.aliexpress.com/e/_DlhF4BV
https://amzn.to/4675Qp0
https://amzn.to/459uvrY
ANDONSTAR AD407
https://s.click.aliexpress.com/e/_Dl4xXrD
https://amzn.to/3PSQKxJ
https://amzn.to/48sxej4

EEPROM Programming
TL866 II+
https://s.click.aliexpress.com/e/_DlsAR1H
https://amzn.to/3RTCRB9
https://amzn.to/3LDu3Lu
CH341A
https://s.click.aliexpress.com/e/_Dk0W2Qb
https://amzn.to/48IZiir
1.8V ADAPTER
https://s.click.aliexpress.com/e/_DciFyrp
CONSUMABLES
NC-559-ASM FLUX
https://s.click.aliexpress.com/e/_DdadZaX
DESOLDER BRAID (I use size 8045)
https://s.click.aliexpress.com/e/_Dl5XUjN
https://s.click.aliexpress.com/e/_DFJyLiX
MECHANIC HX-T100 Solder 63:37 (I use 0.6mm)
https://s.click.aliexpress.com/e/_DeZCC1h
ESD-11 TWEEZERS
https://s.click.aliexpress.com/e/_DCZgSI3
https://amzn.to/3PVfO7e

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Richard