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smps troubleshooting steps service manual

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peter_england

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can any one give me genral computer smps repair service manual ?
 

**broken link removed**
Notes on the Troubleshooting and Repair of
Small Switchmode Power Supplies
Table of Contents

Preface
Author and Copyright
DISCLAIMER

Introduction
The switchmode power supply (SMPS)
Switchmode power supply repair
Most Common Problems
Repair or replace
Related Information
Switchmode Power Supplies
Power Supply Fundamentals
Linear power supplies (LPSs)
What is a switchmode power supply?
Description of typical flyback type SMPS
Advantages of SMPSs compared to LPSs
Where are SMPSs used?

Switchmode Power Supply Troubleshooting
SAFETY
Tips on SMPS troubleshooting
Test equipment
Incredibly handy widgets
Safe discharging of capacitors in switchmode power supplies
Capacitor discharge tool
Capacitor discharge indicator circuit
Voltage checkers
The series light bulb trick
What about SMPSs in TVs and monitors?
Comments on SMPS capacitor discharging and testing with series loads
SMPS failure modes
Sounds that SMPSs make
General SMPS troubleshooting approach
Troubleshooting SMPSs using discrete controllers
Troubleshooting SMPSs using integrated controllers
Initial post-repair testing
Some general switchmode power supply repair comments
Periodic power cycling problems
Testing a SMPS without startup drive

Components Found in Switchmode Power Supplies
Common, unusual, and strange
Switchmode (chopper) transistors and other semiconductors
Capacitors (filter and bypass)
Resistors (normal and flameproof), NTC thermistors, MOVs
Transformers and inductors
Fans

Items of Interest
Panasonic VCR SMPS
Typical controller ICs found in small switchmode power supplies
Unitrode UC3840 programmable off-line PWM controller
Unitrode UC3842 off-line PWM controller
Description of UC3842 startup operation and cycling problems
Switching between 115 VAC and 230 VAC input
Changing the input voltage of a switchmode power supply
Slightly modifying the output voltage of a PC power supply
Use of surge suppressors and line filters
GFCI tripping with monitor (or other high tech equipment)
Why do power supplies seem to fail after a power outage?
Buzzing or other sounds from SMPSs
Cool electrolytics - temperature rating versus ESR
When better may be worse
Alan's SMPS troubleshooting technique
John's notes on SMPS repair
Russell's comments on SMPS repair
Bob's description of how a typical PC power supply works
Steve's comments on PC power supply operation and repair
PC power supply information (pinouts, testing and non-standard uses)
Safe PC power supply loading
Typical PC and ATX power supply schematic
Notes on ATX power supply testing
Detailed Procedure for ATX Power Supply Fault Diagnosis
War stories - the Boschert 2-stage SMPSU
Capacitors, startup, and low voltage testing
Why is the main fuse rating so big?

Service Information
Advanced troubleshooting
SMPS info and datasheets on-line
References on SMPS technology and troubleshooting
Parts information
Information sources on the Internet
Interchangeability of components
Replacement power transistors while testing
Testing of replacement chopper transistors
Repair parts sources
 
Thanks for the article is interesting.
 

Hi friends pls help me for smps problem -- every time when i start pc there is a spark at smps and sound of spark is made but smps is going to work whats the problem -- any suggestion ??
 

He is demanding money and i dont want to pay anything i want solutions free of cost..
 

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