schematic knowledge

Cute mushroom will illuminate several colors, warm, soft, romantic bright night lights shine in the dark. Five leaves and flowers can be inserted into the grass as long as you like. Light levels will automatically change the brightness according to light elegant warm glow for you to create the most quiet.

Mushroom-shaped styling will take you back to childhood to the recollection of it is joy and childlike. In addition to light according to its role in the day, it also has a decorative function. I believe everyone came to your house of friends, will not help but to touch the cute little house. Such a small lamp, energy saving, up at night when the pat on the light, without headlights.

Schematic Diagram is a layout of symbols and and connection of every electronic components circuit  where serve as a guide on how the circuit function or work.

Reading Schematic Diagrams is not a hard task to do, schematic diagrams is a big help to cellphone-repair

especially when working on or tracing  lines and finding where a particular components mounted on a PCB board.

Such schematic diagrams is very useful and very important guide in every cellphone technician. It is equivalent to a handbook.

Learn how to read it. At first you might think that it is hard to do so, You are not going to be an  experts and master in cellphone repair
as long as you don't know how to read it. Many among cellphone
repairman exist nowadays  that do not have any knowledge about reading
it. They always rely on finding free solutions over the internet and
forums. Those people who give free solutions are those people who knows
how to read a schematic diagram.
Now here's your chance to learn and do not rely unto others, and be an
expert and master troubleshooter when it comes to hardware problems.



Okay here's a step on how to read a schematic diagrams.



1. You need to download service Schematic Diagrams, as many or complete package in every cellphone products. each unit of a product have specific service diagrams.



2. You need to download Adobe Acrobat Reader so that you can open the schematic file which is in PDF format.



Now assuming that you already have those I've mention above; Let's try
to open up one file like for example we are going to open a schematic diagram of  Nokia N70.



here's what it looks  like when scrolling down all the pages.

Let's take a little brief on each page  for simple understanding..





A. page 1, In this page where you can find and Identify the whole assembly of the unit.

                 this is also where to findd  the table of contents of the entire circuit's layouts.











B. page 2, In this page is a block diagram of an RF and Baseband:
this is a basic explanation of  the entire connection of a circuit. It
was called  a block diagram for it is being drawed  into blocks.



What is a BASE BAND?

In telecommunications and signal processing, baseband is an adjective
that describes signals and systems whose range of frequencies is
measured from zero to a maximum bandwidth or highest signal frequency;
it is sometimes used as a noun for a band of frequencies starting at
zero. It can often be considered as synonym to lowpass, and antonym to passband, bandpass or radio frequency (RF) signal.





What is a RF?

Radio frequency (RF) is a frequency or rate of oscillation within the
range of about 3 Hz to 300 GHz. This range corresponds to frequency of
alternating current electrical signals used to produce and detect radio
waves. Since most of this range is beyond the vibration rate that most
mechanical systems can respond to, RF usually refers to oscillations in
electronics circuits.









C. page 3, here we can find the system connectors and parts of the unit that correspond to the user or outer parts such us headset, charger and USB connection interfaces.









D. page 4, The  power management circuit, audio codecs and drivers and the interfaces like the microphone, earpiece, mouthpiece, vibrator, sim-card, battery connections. This is the Power Supply Area of the entire circuits.









E. page5, Charging Control and Flash Interface Circuit.









F. page 6, This is the part of the circuit where the all application is being process, Flash IC and memories, this also where application and firmware are being stored.









G. page 7, his the Central processing of the unit (CPU) like the personal computer (PC) cellphone also have a CPU to process applications and software.









H. page 8, A Frequency Modulation (FM Radio) circuit.









I. page 9,This page is the part of an LCD Display and Keypad circuit.











J. page 10,  this is the RF components circuit, In this page the
RF or the process of a network during Transmitting and Receiving Radio
Frequency signals.









K. page 11, This the structure  of the whole PCB Board and all the components mounted in the entire circuit.

                    this is also where pattern of   test-points  for check-up during production and servicing.

at the right side is the pattern of waves of frequencies as a guide by using an oscilloscope, frequency  generator and spectrum analyzer.









L. page 12,  This is where  the table of each and every components is mounted on the PCB board written in codes, like Rxxx - resistorr, Cxxx - Capacitor and etc.

The right side is the scale pattern of every components for quick and easy finding it.









that was only the brief explanation of every pages of an Schematic Diagram. Further we will tackle on it even deeper.

Recently, Sony introduced a LED light can be installed in the camera hot shoe, model HVL-LE1. The head can be rotated and comes with light shields, which sell for about $ 250.Is it the 12 volt LED lights.

Sony HVL-LE1 LED light is composed of 60 LED lamps, color temperature has 5500K, the maximum brightness have 1800LUX, you can adjust the sub-file, the minimum output 10%, can be installed in the hot shoe to be used, a filter tank is also designed to be used 3200K filter, the product uses AA batteries or the same rechargeable lithium battery as the Sony A77.

The video below will tell more about this LED Light HVL-LE1.