Laptop Basics

PARTS OF A LAPTOP!

2012-10-28T00:06:00.003-07:00

If you are keen to know what are the major components present in the laptop , then you've arrived at the right place. Just have a look at the list below:

MOTHERBOARD
CPU (CENTRAL PROCESSING UNIT)
RAM (RANDOM ACCESS MEMORY)
HARD DISK
DVD DRIVER (or) BLUE RAY DISK
BATTERY
DISPLAY
KEYBOARD
MOUSE.

READ OUR OTHER POSTS TO KNOW ABOUT THE OTHER SMALL COMPONENTS ....

LAB COMPONENTS NEEDED FOR LAPTOP

2012-10-28T00:01:00.001-07:00

If you want to set up your own workshop at your home for repairing laptops, these are the things you need:

SMD WORKSTATION or BLOWER
MICROSOLDERING
SOLDERON
LENS LAMP
TWEASER
FLUX
LEAD (1mm & 0.4mm)
CUTTING PLIER
NOSE CUTTER
SLEEVE CUTTER
DRY SOLDERING PUMP
WIG
SCREW DRIVER
MULTIMETER
AMMETER
ELIMINATOR
BRUSH
BLADE
IPA (ISO PROPYL ALCOHOL) SOLUTION
COTTON
RECTANGULAR CHISEL
JUMPER WIRE

COMMON FAULTS IN MONITORS !

2012-10-27T23:53:00.000-07:00

PROBLEM 1: TFT DEAD
If the TFT is dead then check whether the fuse is damaged.

1.1 If the fuse is not damaged then you have to check the following components in order :

Switching Transistor
Switching IC's
Filter capacitor
Primary section resistor open
Primary section diode short
Secondary diode short
Inverter power chip fault
Invertor on/off control transistor

1.2 If the fuse is damaged :

Then the circuit is open, so change it or repair

HOW TO IDENTIFY A FAULT IN A LAPTOP?

2012-10-27T23:41:00.001-07:00

Once you are sure that there is a fault in the hardware components of a laptop, you can check for two things at a glance:

1. Whether the capacitor is puffed

2. Resistor has been burnt

Just take a plain look at the circuit board and try to identify these faults. If present, just mention that this may be the problem and save your money. Many are trying to cheat for even small faults. You ll be charged for Rs. 1500. just for removing the dust, but the bill might say some components mixed with alphabets and numbers where each costs around 100s. In further posts you'll get information about general faults and solutions.

RESISTORS:

How to Use Laptop Computers : How to Buy a Laptop Computer

2011-07-28T10:05:00.000-07:00

How to Use Laptop Computers : Basic Features of Laptop Computers

2011-07-28T10:04:00.001-07:00

How to Use Laptop Computers : Disadvantages of Laptop Computers

2011-07-28T10:04:00.000-07:00

How to Use Laptop Computers : Laptops vs. Desktop Computers

2011-07-28T10:03:00.000-07:00

Laptop Fan

2011-07-10T08:26:00.000-07:00

Laptop Fan :
PC (personal computer) , a quite big structure has a fan for cooling purpose. But in case of Laptops how this is possible? The thickness of laptops are being reduced often. How is it possible to place a cooling system in a slim structure?
But the answer is so simple. The arrangement is as shown in image below :

   You may see a golden brown strip like one. This is nothing but the copper (Cu) strip. Can you mention any one property of copper?
   Yes, absolutely. It is a good conductor of heat and electricity. This Copper Strip is placed above the processor. When processor is turned on, it ultimately gets heated. This heat in turn will be transmitted all along the copper strip. Since heat travels from more heated end to less heated end , we can place our fan at this end. Now we 'll make some provision so that the heat may be liberated from the system to external environment.
   So there is no need that the fan should always be at the top of the processor. It can be parallel to the processor also. No matter where is the fan, is heat getting away? Cool !

for more details : chancer.bone@gmail.com

Laptop Battery

2011-07-10T06:58:00.000-07:00

  Battery types :
   Ni-Cd (Nickel Cadmium) batteries
   Nickel metal hydrate batteries
   Lithium (Li) ion batteries
   Lithium (Li) polymer batteries

Battery Properties:
   Voltage : 9.6 V
   Current : 3800 mA (milli Ampere)
   (These values are mostly used. May vary in some batteries).

Safety Circuit :
   One popular question arises in everyone's mind. "What happens if my laptop is being plugged in power socket even after it has been fully charged ?" .
   Practically speaking we cannot unplug the charger pin, as soon as battery gets fully charged. Here comes the safety circuit. Safety circuit is made up of PTC(Positive Temperature Coefficient). It is one kind of thermistor. Thermistor's resistance value depends upon temperature. PTC has a property, where resistance value is directly proportional to temperature (i.e as temperature increases resistance also increases and as temperature decreases resistance also decreases).
   The safety circuit has three different stages :
   - Starting stage
   - Charging stage
   - Cut-off stage
   The third stage (cut-off stage) helps the extra power to be grounded preventing the current from not entering the battery.
   So now no worries.
   "Just plug and play".
   Thanks to the safety circuit.

For more details : chancer.bone@gmail.com