Chip Systems

What is motherboard? And Laptop motherboard blockdiagram explain:

• a) Laptop Motherboard Block Diagram -Explain
• b) What is difference between dual core board and core i5, i7 board?
• c) Motherboard chip level service tools list

Basic electronics introduction:

• what is difference between electrical and electronics
• What is current and volt?
• What is difference between AC and DC? AC current/volt-DC current /volt
• Difference between normal electronics and SMT electronics
• What is multimeter? How use multimeter?

RESISTOR:

• What is resistor and its working function?
• Types of resistor
• Resistor colour coding
• Difference between normal resistor and SMT resistor
• How find smd resistor value? And its checking method

CAPACITOR:

• What is capacitor and its working function?
• Types of capacitor
• Difference between normal capacitor and SMT capacitor
• How find capacitor value? And its checking method

Student soldering practical-resistor and capacitor
INDUCTOR AND TRANSFORMER:

• What is inductor and its working function?
• Types of inductor
• Inductor checking method
• What is transformer and its working function?
• Types of transformer
• transformer checking method

DIODE:

• What is diode and its working function?
• Types of diode
• Difference between normal diode and SMT diode
• Diode checking method

TRANSISTOR:

• What is transistor and its working function?
• Types of transistor-mosfet,Fet,PNP and NPN
• Difference between normal transistor and SMT transistor
• Transistor checking method

Students soldering practice:

• Mosfet and diode

Integrated circuits [IC]:

• What is ic ? and its working function?
• Types of ic
• Various packages of ic
• Smd double side ic removing and fixing by using SMD REWORK STATION
• Smd four side ic removing and fixing by using SMD REWORK STATION

How to Solve Laptop Power Adapter Problem? – Practical:

• Laptop Battery Charging Slowly
• Laptop are not power on
• No output voltage for adapter [0 volt]
• Less output voltage for adapter [16v/17v]
• Adapter over heating
• Earth shocking problem

Power Section-How Laptop Power Section Works?:

• How super IO ic works? And its function-Block diagram
• How motherboard power on?
• How work battery section and step- down Voltage regulator section?

Adapter V In Section [AC-Mode] -Practical:

• Problem: Not power on Laptop both battery power and adapter power mode [Laptop Dead]
  • Symptoms: power LED are not glowing /FAN are not rotate,
  • When plug in adapter to laptop then OFF adapter power LED>>>>
  • After unplug adapter from laptop then adapter indicator LED is ON.
  • When plug in adapter >>>then the adapter indicator LED is blinking.
• Battery Terminal pin outs
• Battery charger IC pin outs and its function
• Adapter Voltage [VIN] IN circuit tracing/fault finding method and its troubleshooting tips
• Battery Charge Line tracing/fault finding method, and its trouble shooting tips

Battery Charging Section [Charge Mode]-Practical:

• Problem 1: Laptop working by Adapter power mode only, but are not charging battery /and are not working battery power mode
  • Symptoms: power LED are not glowing /FAN are not rotate,
  • When plug in adapter to laptop then OFF adapter power LED>>>>
  • After unplug adapter from laptop then adapter indicator LED is ON.
  • When plug in adapter >>>then the adapter indicator LED is blinking.
• Problem 2: laptop battery charging very slowly and charge percentage are not increase
• Problem 3: After remove battery from laptop >then laptop working properly through adapter power>then connect battery to laptop >are not power on laptop both power mode
• Problem 4: laptop battery power quickly discharged >quickly goes low battery level
• Problem 5: when power on laptop >power LED is glowing and fan are rotating >now battery LED is blinking continuously [on then off] then suddenly off laptop power

DC mode:

• Battery Power Terminal [Discharge Line] tracing /fault finding method and its trouble shooting tips
• PMOS and NMOS charging circuit comparison

STUDENT PRACTICE

• Adapter vin circuit and battery charging circuit
• [AC mode,DC mode and Charge mode]

Step-Down Regulator Section:
MAIN STEP-DOWN VOLTAGE REGULATOR CIRCUIT [3.3V & 5V] Circuit Fault Finding/Tracing and its Troubleshooting Tips

• a) What is step down regulator section problem? [laptop power fail or dead board]
• b)step-down ic pin outs and its function
• c) What is always power?

Student practice:

• Step down regulator circuit

CPU V core circuit fault finding -practical:

• CPU Voltage Regulator Section Circuit Fault Finding/Tracing and its Troubleshooting Tips [below 1.5V]
  • a) What is cpu regulator circuit problem? {Power on laptop >fan are rotating >then suddenly board is off and cpu over heating problem}
  • b)cpu circuit N-mosfet connectivity explanation
• b)cpu circuit Mosfet and capacitor checking method

Student practice

• CPU V core circuit fault finding

MEMORY [DDR1/DDR2/DDR3] VOLTAGE REGULATOR SECTION Circuit Fault Finding/Tracing and its Troubleshooting Tips [2.5V/1.8V/1.5V]:

• What is memory regulator circuit problem?
• a)power ok>fan are rotate but no display both LCD screen and external monitor
• b) Power on laptop >fan are rotating >then suddenly board is off

CHIPSET VOLTAGE REGULATOR SECTION Circuit :
Fault Finding/Tracing and its Troubleshooting Tips [1.5V/1.05V]

• a)What is chipset regulator circuit problem?
• b)Power on laptop> the chipset produce abnormal heat >then board is suddenly off [BGA chipset short]
• c)Poor display for both LCD screen and external monitor {BGA chipset weak}
• d)No display for both LCD screen and external monitor [BGA chipset fail]

STUDENT PRACTICAL:

• Ram and chipset voltage regulator circuit

Laptop motherboard voltage checking method for power fail laptop motherboard [motherboard Dead]

• a) How check adapter volt power line [19V]?
• b) How check battery terminal volt in laptop motherboard [12V]?
• c) How check always volt in power button and IO chip near?
• d) Where to check regulated output voltage[3V/5V/1.5V/1.05V and cpu voltage]?

LAPTOP -No Display Problem-PRACTICAL:

• Laptop Power ON ok /power LED is Glow and CPU cooler FAN is Rotating continuously…but No Display Problem for Both LCD screen and External VGA
  • How check Northbridge Video chipset voltage?
  • How check south bridge chipset voltage?
  • How check DDR1/DDR2 & DDR3 RAM voltage?
  • Latest i5/i7 cpu motherboard complete voltage checking method

Clock Frequency Checking-CRO Practical:

• No Display Problem for Both LCD screen and External VGA
  • What is clock and frequency? [HZ/KHZ/MHZ]
  • How check system clock crystal frequency by CRO [14.3 MHz]?
  • How check system clock generator clock output frequency?

BGA REWORK PRACTICAL:

• No Display Problem for Both LCD screen and External VGA
  • BGA CHIPSET Dry soldering method
  • BGA chip replacement by using BGA Rework Machine
  • BGA chip reballing method

LCD Screen Power Supply Section:

• No display problem only LCD screen but external VGA monitor ok
  • LCD Screen power supply circuit fault finding /circuit tracing and its trouble shooting tips
  • No LCD signal and no Backlight problem
  • LCD signal OK but No backlight problem [Black screen]
  • No LCD signal but backlight ok problem [white screen]
  • LCD screen vertical lines problem
  • What is difference between LED and CCFL Backlight?
  • Backlight CCFL inverter circuit function

STUDENT PRACTICAL
BIOS FLASHING METHOD -Practical:

• What is BIOS?
• Why reprogram BIOS? [Password problem/Bios Rom checksum error message/laptop not booting problem/no display problem/post Error message problem and Etc…]
• Bios chip pin outs and capacity identification
• Bios file backup method using Bios Programmer kit

Audio section problem -practical:

• No any sound signal for laptop
• Speaker /microphone and head phone are not working
• Head phone and mic are working but speaker no sound signal
• Speaker sound signal is very low
• Poor sound [distortion] signal for speaker
• Left side speaker ok but right side speaker no sound signal

USB power circuit problem and its troubleshooting:

• How solve USB Port not working problem -practical
• Laptop online reference website [laptop board circuit/BGA chip/power ic/io ic /mosfet and etc]
• Laptop motherboard parts and tools shop address list collection

Students practical