Laptop motherboard troubleshooting guide 1

Sửa chữa mainboard, chipset laptop bản tiếng Anh, in màu, có diễn giải chi tiết, cung cấp những kiến thức cơ bản về sửa chữa laptop. Giúp các bạn có cái nhìn tổng quan về những linh kiện của một chiết laptop. Đồng thời hướng dẫn sửa chữa những bệnh thường xảy ra trên laptop

1 - Table of Contents Security Notice 10 Disclaimer 11 Introduction…………………………………………………………… 12 Entrepreneurial Mindset 13 PART Introducing the Laptop Foundation Knowledge Explore a Laptop 15 How a Laptop Differs from a Desktop 16 Review Types of Laptops .17 Understanding Microprocessors 21 Explore Power Options 25 Structure of a Laptop 27 External Elements 28 Internal Elements 29 Types of RAM Memories in Laptop 31 Types of Laptop Displays 33 Service Manual 34 Datasheet of Components 37 Schematic Diagram 40 PART Tools and Equipment a Repair Shop Should Have Hot Air Work Station 42 Soldering Iron 42 Desoldering Pump .43 BGA Kit 43 Soldering Leads 43 Soldering Paste 44 Paste Flux 44 Solder Wick 44 Jumper Wire 45 DC Power Supply Unit 45 MultiMeter 45 Magnifying Glass 46 Casing Openers 46 ScrewDriver 46 Nose Cutter 47 Soft Brush 47 Wrist Strap 47 Antistatic Desk Mat .48 Tweezers .48 USB Digital Microscope 48 MicroScope 49 OscilloScope 49 RT809F Programmer 50 PART Basic Electronics What is Electricity? 52 Electricity .52 Structure of an atom 53 Current 53 Voltage 54 Resistance 55 Measuring current, voltage and resistance 56 The Water Analogy 56 Ohm’s Law and Electric Power .57 Ohm’s Law 57 Electric Power 58 Direct and Alternating Current .58 Part How to use a multimeter Selecting a Multimeter 62 Getting familiar with the multimeter 63 Ports 64 Measuring voltage .65 Checking the continuity .67 How does it work? .68 How to test AC voltage (Alternating Current) .69 Part Basic Electronics in Laptop Repairing Basic Electronics (SMD components) 72 Fuse .73 Resistor .75 Understanding the Resistor Code 75 Determining the value of resistance 77 Resistors in Series and in Parallel 78 Resistors in Series 78 Resistors in Parallel 79 SMD Resistor .80 EIA96 SMD resistor code system 81 SMD resistors with 3-digit code values less than 10Ω 83 SMD resistor with 4-digit code system Values less than 100Ω…… 84 SMD Network 85 Resistors in the Circuit 86 Resistor as Resistance 86 Resistor as a Reducer Voltage 87 Resistor Grounding 87 Resistor Measurement 88 Test SMD Resistors 89 Capacitor .90 Capacitor basics 90 Capacitors in the Circuit .93 How to measure capacitance .94 Capacitor measurement using voltage 95 Capacitor measurement without voltage .96 Diodes 98 Diode Zener 90 LED Diode 100 Testing Diode using (Diode Test Mode + Resistance Mode) 101 How to test LED (Light Emitting Diode) 102 How to test Zener Diode 102 Inductor-Coil 103 How to test Inductor 104 Transistor 105 NPN transistor 106 PNP transistor 106 MOSFET .107 Types of MOSFET used in laptops .107 PINOUT Identification of Mosfets used in recent Laptops 108 Transistor Mosfet Legs 109 N-Channel & P-Channel Mosfet Characteristic 110 How to check Mosfet 112 CMOS or RTC Battery 114 Crystal .116 Off-On Switches (Power-button) 117 Integrated Circuit (IC) 119 Where is pin on an IC? 120 SUPER I/O 122 PWM IC .124 Part Analyzing and understanding the motherboard Analyzing and understanding the Motherboard 127 Schematic Diagram 128 How to get the schematic diagram? 129 General Info .129 Find the Motherboard ODMs .129 Symbol and Screen Printing .134 Signal Name for Motherboard Manufacturers 136 Operating Sequence 143 Input Circuit (High Voltage) 146 Power Section 148 Primary Sources (3V and 5V) 152 Charge Source (battery) .157 VCORE (processor) .159 Source Chipset 160 Chipset Circuit Analysis (VOLTAGE 1.05V)) 162 Memory Source 163 LVDS Circuit (Video) 165 Voltage Divider 167 BIOS & RTC (CMOS) 170 How to re-program (Flash) BIOS? .172 How to remove password BIOS HP .175 How to flash BIOS type TSSOP-8 178 How to Find Short on the Motherboard .185 Part Laptop Repair Case Study Laptop won't turn on? .188 1- Laptop won't turn on (no signal at all) 188 2- Laptop turns on and does not give video 191 3- Laptop turns on and off quickly 193 Acer Extensa 5230 Power Failure .195 Acer eMachines E525 Laptop Power Failure .212 Acer Aspire D270 Laptop Power Failure .229 Part Useful Laptop Power Sequence by Shri Ram Infotech Laptop Schematic Diagram 255 Laptop Chip Voltages 256 Apple Laptop Power Sequence 257 Intel Core-i3 Laptop Power Sequence 258 SIO Signal Description 259 VIN Section…………………………… 260 Core i3 VRM Section……………… 261 10 Security Notice This is the kind of thing I hate having to write about, but the evidence is clear; piracy for digital products is over all the internet For that reason I’ve taken certain steps to protect my intellectual property contained in this eBook This eBook contains hidden random strings of text that only apply to your specific e-Book version that is unique to your email address You probably won’t see anything different, since those strings are hidden in this PDF I apologize for having to that - but it means if someone was to share this eBook I know exactly who shared it and I can take further legal consequences You cannot redistribute this eBook This eBook is for personal use and is only available for purchase at: https://www.laptoprepairsecrets.com Please send an email to the author (laptoprepairsecrets@gmail.com), if you found this eBook anywhere else What I really want to say is thank you for purchasing this eBook and I hope you have fun with it! 249 The following photo is from the schematic diagram to show the measurement points on the legs of the Mosfet H Pin N°4 on the diagram symbolizes to Gate of PQ13 and +3V_DH is the voltage value on the upper gate VIN: input voltage of 19V and the measuring point of this voltage is pin source of PQ13 MOSFET 1-2-3 Source pins of the PQ13 MOSFET and +3V_LX is the voltage value on source MOSFET 250 The next image of the measuring points on the battery connector Pin is the signal MBDATA and the presence of voltage on pin means the safety of the signal Pin is the signal MBCLK and the presence of voltage on pin means the safety of the signal Pin is the signal TEMP_MBAT_C and the presence of voltage on pin means the safety of the signal 251 The following photo is from the schematic diagram to illustrate the measurement points on the battery connector 252 The next photo for measuring voltage on the power button (PWR button) NBSWON# the value of this signal is 3.3v, we find this value on the power button once connect the power adapter to the laptop motherboard, when the power button is pressed, this signal is go to the I/O unit on pin 95 253 The motherboard works successfully after connecting the adapter power and pressing the power button 254 Part Useful Laptop Power Sequence by Shri Ram Infotech Laptop Schematic Diagram 255 Laptop Chip Voltages 256 Apple Laptop Power Sequence 257 Intel Core-i3 Laptop Power Sequence 258 SIO Signal Description 259 VIN Section 260 Core i3 VRM Section 261 262 I wish you all the best and look forward to hearing your success story To your success www.LaptopRepairSecrets.com 263 If you have any information regarding the illegal reselling or duplication of the E-book, please report it to laptoprepairsecrets@gmail.com for your reward Copyright www.LaptopRepairSecrets.com All Rights Reserved You CAN NOT give this E-book away for free You don’t have the rights to redistribute this E-book in internet or no matter where it is ... recent Laptops 10 8 Transistor Mosfet Legs 10 9 N-Channel & P-Channel Mosfet Characteristic 11 0 How to check Mosfet 11 2 CMOS or RTC Battery 11 4 Crystal .11 6 Off-On... Motherboard .18 5 Part Laptop Repair Case Study Laptop won't turn on? .18 8 1- Laptop won't turn on (no signal at all) 18 8 2- Laptop turns on and does not give video 19 1 3- Laptop turns... 10 Disclaimer 11 Introduction…………………………………………………………… 12 Entrepreneurial Mindset 13 PART Introducing the Laptop Foundation Knowledge Explore a Laptop 15 How a Laptop