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Desktop Motherboard Repairing Concept

$200

  • Understand Block Diagram Of Motherboard
  • Understand Power Section Of Motherboard
  • Testing of motherboard signals cold and warm testing
  • Cleaning motherboard solution steps
  • Removing and replacing basic components and sockets
  • Different section of motherboard
  • Practice
  • Analysis pan
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Product Description

Module 2.1 Desktop motherboard repairing

NOTE :-before going to this class student should clear concept of basic smd electronics and computer hardware basic knowledge

Understand Block Diagram Of Motherboard

chp 1) Block diagrams of computer motherboards

Understanding desktop motherboard block diagram, Basic function of computer motherboard, Bus connectivity (Address, Data, Control Bus), different types of motherboard,  cpu, north bridge, south bridge, io controller, audio, lan, pci slot, isa slot, agp graphics card slots, usb, ps/2 , serial, parallel , vga connector, etc

chp 2) basic working detail computer motherboards, power on signals

What is basic requirement to run motherboards, how much power required to each chips, clock, what is process of starting of motherboard, how different power generate, how clock generate and supply to each chips,

chp 3) power source atx smps and vrm section

How many types of smps & connector  in computer, – 20pin or 24pin power connector , diffrerence colour wire and signals detail , how smps start , which power always start from smps, pson green wire 3v, sus power , what is function of pgood signal of smps , how pson become low by motherboard, thru sorting on off process, special connector for vrm section,

Block diagram explaining how smps start ,  detail after starting pgood what is next process, Different power and used primary,. Secondary power supply, cpu power supply stable voltage for ram,  different power  +-5v, 12v 3.3v, +5vsb,+2.5 dual,+2.5,pson,pwrok, +3vsb,

Understand Power Section Of Motherboard

  • power on sequence of computer motherboard (K8V-MX)
  • Understanding power on stage signals of computer motherboard(K8+K8M800+VT8237 (K8V-MX)
    +3VSB,RSMTST#, PWRBTIN#, SIO,PWRBTIN#, SUSC#, SUSB#PASON_S/O#,PSON#, +12, +5V +3V,+12V TO VRM, ATX_PWRG, +2.5V, +2.5VEN, VCORE_EN,VCORE, VCORE_PG,+1.2EN, SB_PWROK,NB_PWROK, CPU_PWOROK, SB_PCIRST, CPU_RST,
  • Understand VRM Power Section Vcccore
TESTING DIFFERENT SIGNALS OF MOTHERBOARD WITH MULTIMETER AND CRO
COMMON FOULT LIST AND REPAIRING SOLUTION OF MOTHERBOARD
chp 4) MOSFETS & COILE USED, SWITHCHING AND REGULATOR POWER SUPPLY VRM (How to check mosfet?)

How source and drain are managed by gate signals? What is the function of mosfet in power supply? How to find about mosfet whether it is short open or ok? Mosfet used in VRM,  switching power supply, linear output etc example, testing VRM power supply, online & offline testing of VRM section

chp 5) CPU & VRM Section Detail With Different Phase

Types of cpu, main signals of cpu, power supply to cpu   VRM, different phase of vrm section , study different board vrm and testing offline and online different board, testing thru cro gate pin of mosfet,

chp 6) Clock generator , RTC & main

When RTC clock is running, how its get power, basic signals detail with diagram, Understand clock generator chip funciotn 14.318mzh crystal, different clock signal generate from clock chip , main signals of clock chip, where to check clock frequency PCICLK,  SYSCLK

chp 7)

(a) north bridge

What is main function of north bridge, which power and clock signals required to north bridge, common problem of north bridge

( b) south bridge

Main function of south bridge, connection of different chip with south bridge, main power to south bridge, clock frequency , main problem with south bridge , usb, audio, lan, i/o, rtc, bios, connected with south bridge

 

chp 8) i/o controller

Main signal of i/o controller , com port, mouse, keybord, ps2, connection, power supply , clock etc

chp 9) lan and audio chip

Main signal of lan and audio chip

chp 10) BIOS Update , debug card detail, Debug card error

Types of bios chip , main leg of bios chip , power to bios chip

chp 11) ram and power supply

Types of ram socket, power supply pins of ram, common problem of ram slot,

chp 12) reset signals detail

Meaning of reset signals   2 types of reset warm , cold reset ,

chp 13) Connection serial, parallel , ps2, usb,

Understand connection deltail of different components, comport, ps2 connection, usb connection, printer lpt port connection,  moniter connection

chp 14) pci isa detail pin out

Pci/isa agp slot pinout , testing pin detail  of isa slot,

chp 15) (a) slot tester and use detail

CPU slot tester, RAM slot tester, PCI slot tester , HDD etc

Testing of motherboard signals cold and warm testing

 

chp 15) (b) testing with multimeter different signals of motherboard

How to check different voltage on motherboard, primary main sus ram, how to find shorting components, common problems and solution fan rotate but no display , fan not rotate, no debug card error shows, no smps start, cpu not heat, clock is not generate, no display , cpu over heat etc

Cleaning motherboard solution steps

chp 16)Main problems created by dust articles accumulating on motherboard

(a) Washing, Cleaning, drying the motherboard

How to wash motherboard to clean, procedure after washing, how to Dry the motherboard.

(b) Dry solder problem solution steps

Other main problem occurs due to dry solder problems, some contact of chips or component may dry, what is process? How to solve dry solder problem, demo of baking oven to dry motherboard,   heating using a hair drier,

Removing and replacing basic components and sockets

 

chp 17) (a) Removing and inserting different chips practice (video & step)

Replacing different ICs, using soldering irons and smd blower etc..

(b) & replacing sockets , CPU , RAM, PS2, COM ETC

Demo for removing Removing and replacing cpu socket, ps2 connector, HDD connecter, IDE connecters, ,ps/2, printer port, monieter etc.
BGA Rework Removing And Reballing Of BGA Chip Of Motherboard

chp 18) (a) ICs rebelling, BGA ball arrangement, practice., Using BGA machine

Training Using BGA Soldering Station,

Removing BGA Chips and Rebelling It Using Reball Stencil
Two methods

1st by applying balls with help of BGA station

2nd applying liquid paste PPD and heat with BGA blower

(b) Introduction to different BGA machines

Infrared and normal blower, introduction to 3 different Machine ,we used low end to high end, different method of reboll  A chip,

why is reballing required

1st method ( inserting BGA balls using stencils)

2nd method (using a direct paste application)

Practice with BGA rebolling

Removing and inserting BGA chip practice

BGA reballing process ( videos and notes)

chp 19) Bios update concept common fault and solution detail

Bios working Detail

chp 20) Demo For Other Products Available

Introduction to module lapto course syllabus ,   technical support,   Laptop schematic diagram collection, laptop repairing advance tips collection, different models different problems collection, different board having difference power chips with name , lots of service centre collection, computer bios collection detail , etc

Different section of motherboard

 

INTRODUCTION TO DESKTOP MOTHERBOARD

  1. Motherboard Block Diagram, Function and Main Ics detail work Theory and Practicle idea
  2. Main Signals of Motherboard And How motherboards Work Different ic list
    Motherboard Brands (INTEL, ASUS, GIGBYTE, MERCURY, MSI, ETC)
    CPU Type (LGA775,DUALS730,QUODSLOT2, SLOT1, SLOT7ETC)
    North Bridge (NFORCE, AMD, SIS, VT, I845, I875)
    South Bridge (SIS, VT, INTEL, NVDIA)
    I/O Controller IC (ITE, WINBOND, FDC, SMSC, SMART ETC)
    VRM- Voltage Regulator Module IC (RTL, ADP, WINBOND, ETC)
    VRM- Voltage Regulator Module Mosfet(-CHN017NF, HAP117,B5TO3GH, F3711S,NIKOS ETC)
    Clock Generator IC(WINBOND, ICS, ETC)
    Serial Port IC(GD75232, ST75185, ETC)
    LAN IC (3COM,REALTECH, MARVEL, ETC)
    Audio IC (CRYSTAL, ALC, CREAFVE, ETC)
    BIOS (SST, WINBOND, INTEL, ETC)
    Mosfet (92039, 70120H, IS313W, 537, FR3704, ETC)
    Socket (SMPS, IDI, CPU FAN, CMOS, CFLL, ECT)
    Connectors (VGA, PS2, VSB, KEYBORD, SOUND, LPT, SERIAL, LAN, ECT)
    SMD Component (RESISTOR CAPACITOR, TRANSISTOR, DIOD, FUSE, COIL, ETC)
    Crystal (14.318 CLOCK , ETC)
  3. TRACING DIFFERENT CONNECTOR AND SOCKET WITH RELATED COMPONENT AND CHIP
  4. POWER SUPPLY BASIC CONCEPT
  5. INTRODUCTION TO LAPTOP MOTHERBOARD
  6. DEFINE DIFFERENT LAPTOP PROBLEMS
  7. Main Signals of Motherboard And How motherboards Work with Different ic list .
chp 21) List Of Tools Required To Repairing Computer Motherboards Chip Level

Soldering iron, screwdrivers sets, smd rework station, bga machine, micro iron, ram slot tester, cpu slot tester, debug card, bios programmer,

 

  • Different chip used in different models list
  •  

  • Motherboard Brands (Intel, Asus, Mercury, Gigabyte, Msi, Amd, Abit, Biostar, Tyan, Hp, Asrock, Compaq)
  •  

  • CPU Types (Socket 423,Socket 463, Socket 478, Socket 479, (Socket M), Socket 775/ (LGA775)/ (Socket T), Socket 603, Socket 604, Socket 771, Socket 418, Socket 611, Socket 462, (Socket A), Socket 754, Socket 939, Socket 940, Socket AM2,  Socket AM2+, Socket S1, Socket F, Slot 1, Slot 2, Slot A
  •  

  • North Bridge (NFORCE, AMD, SIS, VT, I845, I875)
  • South Bridge (SIS, VT, INTEL, NVDIA)
  • I/O Controller IC (ITE, WINBOND, FDC, SMSC, SMART ETC)
  • VRM- Voltage Regulator Module IC ( RTL, ADP, WINBOND, ETC)
    VRM- Voltage Regulator Module Mosfet(- CHN017NF, HAP117, B5TO3GH, F3711S,NIKOS etc)
  • Clock Generator IC(WINBOND, ICS, ETC)
    Serial Port IC(GD75232, ST75185, ETC)
  • LAN IC (3COM,REALTECH, MARVEL, ETC)
    Audio IC (CRYSTAL, ALC, CREATIVE, ETC)
  • BIOS (SST, WINBOND, INTEL, ETC)
  • Mosfet (92039, 70120H, IS313W, 537, FR3704, ETC)
    Socket (SMPS, IDI, CPU FAN, CMOS, CFLL, ECT)
    Connectors (VGA, PS2, VSB, KEYBORD, SOUND, LPT, SERIAL, LAN, ECT)
  • SMD Component (RESISTOR CAPACITOR, TRANSISTOR, DIODE, FUSE, COIL, ETC)
    Crystal (14.318 CLOCK , ETC)Atx power connection
  • On/off switch
  • Isa/ agp pci connector
  •  

    Practice

    1. Datasheet Search any components

    2. Read the motherboard schematics.

    3. Identify the main components and circuit

    4. The actual steps on the main measuring

    5. Use the main test card

    6. Using machines to load the BIOS ROM.

    7. Check, Replace MOSFET

    8. Alternative sources IC

    9. Rather SIO

    10. Rather Clock IC

    11. Use the tool to the chipset leg

    12. Replace chipset South, North with machines (Received technology transfer when a demand for this machine).

    13. Test socket CPU with specialized tool.

    14. Rather hard + chipset using a chip steamer (if required)

    15. Introducing specialized tool such as CPU load fake, test socket, test card, chipset foot grid, foot soles chipset, as chip fat, bi to chip, chip maker

    16. Connection between PC and Laptop mainboard.

    16, 17 Problem, testing  and repairing steps

     

    Analysis pan:

    1. No source size.

    2. Shutdown boot order.

    3. Fans spin, no boot.

    4. Loss of clock

    5. Loss of power CPU (Vcore)

    6. Losing power and RAM bus ram

    7. Loss of power chipset.

    8. Loss of the reset pulse.

    9. Signs of open sockets, chipset

    10. Do not get USB, HDD

    11. Do not get Sound, LAN

    12. Do not get keyboard, mouse

    13. Not out of the VGA.

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