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    smps troubleshooting steps service manual

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

    •   Alt20th August 2012, 18:35

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    Re: smps troubleshooting steps service manual

    http://repairfaq.ece.drexel.edu/sam/smpsfaq.htm
    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
    "facts or figures from which conclusions can be inferred; information"


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    •   Alt20th August 2012, 18:50

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    Re: smps troubleshooting steps service manual

    thanks for helping me ..



    •   Alt20th August 2012, 19:02

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    Re: smps troubleshooting steps service manual

    Thanks for the article is interesting.
    br,
    Freezzby



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    Re: smps troubleshooting steps service manual

    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 ??



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    Re: smps troubleshooting steps service manual

    To learn about SMPS repairs: www.powersupplyrepairguide.com



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    Re: smps troubleshooting steps service manual

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



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