Wednesday, 23 March 2016

Diagnosis and Troubleshooting on Motherboard

Diagnosis and Troubleshooting on Motherboard
Diagnosis and Troubleshooting on the motherboard, this theory there exist on the network computer engineering module To find or determine the type of damage that exist on the PC is required inspection of the condition of the hardware on the computer. These checks include: POST (Power-On Self-Test), a common diagnosis (routine), and seek diagnosis and solve the damage. From the results of this examination will be known location of the damage and the type of damaged components for later improvement against parts experiencing the damage.

a). The problems that may occur
The computer system consists of a motherboard, daughter boards, power supply, floppy drives, monitors, keyboards, and some equipment that is connected through connectors and cables. Problems in the equipment will affect the operation of other equipment and sometimes interfere with the operating system. Following checks will help solve the problem.

    
Check the main power supply cable connections and the DC voltage cables.
    
Check the keyboard cable connection.
    
Check the monitor cable connection and the monitor power cable.
    
Check the CMOS configuration settings
    
Check cable connections drive power and data cables.
    
Check all daughter board or card installed in the slot I / O
    
Check the connection reset switch
    
Check the position of the keyboard lock
    
Check all IC attached
    
Check the boot disk in drive A
    
Check the speaker connection
After all the checks carried out, turn on the power switch and find a POST error message. Issue of POST messages can be localized and repaired. When the POST can not run, then the problem occurs on the motherboard and circuit inside. By checking the signal at the I / O slot on the motherboard damage problems can be identified because all signal connected to the CPU I / O slot.
b). Procedure Diagnosis and Troubleshooting
1). Checks 1. Power Supply

Check the power supply voltage level at I / O slot

Diagnosis

    
Is the main card is plugged in?
    
Is the power supply fan spinning?
    
Is the connection P8 and P9 connected properly?

If there is no voltage level at the connection pins P8 and P9 power supply, then there's a problem in the power supply circuit. Fix the power supply by replacing with a new power supply.
2) Check 2. Signal clock

Measure signal CLK, OSC, PCLK, RESET DRV, I / O CH RDY, I / O CH CHK pin slot I / O using the logic probe or osiloskope.


 
Diagnosis

    
If no signal CLK, OSC, PCLK, check the crystal and clock generator circuit.
    
If RESET DRV is always high, check the power good signal, a series of power on reset and manual reset switch condition.
    
If no signal I / O CH RDY and I / O CH CHK off and check all daughter boards. If the problem persists, the problem is on the motherboard and the circuit. How to repair is replace the motherboard with a new motherboard.

3) Checks 3. The CPU and DMA

Check the signal ALE, MEMR, MEMW, IOR, IOW, AEN using logic probe or osiloskope.
Diagnosis

    
If the signal ALE, MEMR, MEMW, IOR, IOW no pulse, check the motherboard CPU section
    
If the signal AEN no pulse, turn on DMA.

How to repair is replace the motherboard with a new motherboard.
4) Checks 4. Checks Keyboard

    
Check the signal KBCLK, KBDATA on keyboard
    
Reset the system and press the key on the keyboard checks the signal on the data line keyboard
Diagnosis

If KBCLK and KBDATA there is no damage from the keyboard to the motherboard lines. How to repair is replace the motherboard with a new motherboard.
If KBCLK and KBDATA no damage from the keyboard on the keyboard.
Summary

    
Damage to the PC consists of internal damage (motherboard and components that are inside / system board) and external (power supply, keyboard, mouse, disk drives, hard drives, and peripherals support).
    
General damages that occur due to the lack of good connections / relationships between peripherals with the motherboard.
    
The initial steps must be taken to improve the PC is to check the connection / connection of peripherals to a motherboard and a voltage source.
    
PC motherboard repairs carried out by repairing or replacing parts / components are damaged.
5) Replacement components must be in accordance with the specifications.

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Way Device Installation Local Network (LAN)

Device Installation Local Network (LAN)
Device Installation Local Network (LAN) is a theoretical modules and practical engineering or computer network that discusses the installation of up to test LAN network.

This module consists of three (3) learning activities, and learning activities 1 contains the introduction to the basic concepts, network topology, and protocol required by the network, revision 2 contains the installation hardware (hardware) on LAN, and learning activities 3 contains the installation and configuration of LAN components and the software and network troubleshooting.


With this module training participants are expected to explain the principles / basic concepts, installation / configuration of hardware and software, and troubleshoot the LAN network.

A. PREREQUISITES

Starting capabilities required for studying this module are:


    
Training participants have passed the module / training material Operate stand-alone PC-based operating system with a GUI.
    
Training participants have passed the module / training material Operate stand-alone PC-based operating system with TEXT.
    
Training participants have passed the module / training material Installing software.
    
Training participants sufficient knowledge of magnetic and electromagnetic induction.
    
Training participants master the knowledge of the operation of the operating system corresponding instruction manual.

B. MANUAL MODULE

1. Instructions for Participant Training

Training participants are expected to play an active role and interact with learning resources that support, because it must pay attention to the following matters:

a. Study measures to be taken

    
Prepare tools and materials!
    
Read carefully the description of material on each learning activity, so the basic concepts, as well as ways installation of LAN networks can be well understood. If there are not clear ask the instructor!
    
Make checks (troubleshooting) on ​​the results of the installation.

b. Supplies should be prepared

To support the safety and smooth running of tasks to be done, then prepare all the equipment necessary. Some of the equipment is to be prepared:

    
Workwear (wearpack).
    
PCs already installed with the operating system if the operating system based on TEXT or GUI-based operating system
    
User manual operating system.
    
Network devices, ranging from cables, connectors, NIC, HUB, etc.
    
Log sheet or report sheet set (by the company).
    
Equipment or instruments related to the implementation of this unit.

c. Training results

Training participants understand and be able to install a local network devices (hardware and software) correctly and well.

2. Role Instructor / Teacher

The instructors / teachers who will teach this module should prepare as well as possible strategies that cover all aspects of Learning, mastery of materials, selection of methods, tools and evaluation tools Learnings media.

The instructor / teacher should prepare a draft strategy Learnings capable of accomplishing the training participants were actively involved in the process of achievement / mastery of competencies that have been programmed. The drafting of a strategy Learnings refers Performance Criteria (KUK) on each subkompetensi is in GBPP.

C. FINAL DESTINATION

    
Training participants were able to explain the basic concept, topology, network protocol LAN and cabling.
    
Training participants can carry out the installation of a local network (LAN) in accordance with the procedure.
    
Training participants can conduct testing through the operating system or specific applications

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way Server Administration on network

Administer Server in Network
Administer the server on the network module on the theory and practical engineering or computer network that discusses the basics of administering Server to manage a network both as a local network or a broad-based network (WAN). In a computer that is used by many users and has not implemented the provision Disk Quota, often each user stores data without regard to the capacity of the computer hard drive. Of course in will cause problems that make an administrator dizziness.

Administer the server on the network. To overcome that each user can not store data beyond the permitted capacity, an administrator needs to apply the provision of disk quotas to each of the user. However, there may be some users who want to be given a larger disk quotas or even possible given unlimited disk quota. Therefore the application can be set up disk quotas quota each division according to the desired user.

Many options can be used in determining how to provide Yag quota limits may be allocated to a user or group, namely whether to specify the disk space or to specify many files they may create. You can optionally restrict the allocation of disk space (block quotas) or based on the number of files (inode quotas) or perhaps a combination of both. Each of these restrictions will then be divided into two categories, namely category of hard limits and soft limits.


Hard limits should not be bypassed. Once a user reaches the hard limit, he will not get additional new allocations on the file system. For example if the user has a hard limit of 500 blocks in a file system when he has mengggunakan block 490, then the user is only left with the allocation of 10 blocks. If he tries to allocate an additional 11 blocks, then this business will fail because it is already past the hard limit.

Instead of soft limit can be bypassed but only for a predetermined time. This period is known as the grace period, which is the default price or seven days a week. If a user retains in excess quota limit soft limit longer than the grace periodyang has, then the soft limit will turn into a hard limit. Then, because of the nature of hard limit, he will not receive additional allocations again. When the user restore disk space usage below its quota limit, the grace period will be reset.

B. PREREQUISITES

Starting capabilities required for studying this module are:

    
Training participants have passed the module / training material administer network devices LAN (Local Area Network)
    
Training participants master the knowledge of the operation computer`
    
Training participants are able to operate a computer in accordance with the instructions manual book.

C. INSTRUCTIONS FOR USE MODULE

1. Instructions for Students

Students are expected to actively participate and interact with learning resources to support it, because it must be considered some of the following:

a. Steps - Step Learning

This module contains material concerning the competence Server Administration on network connected network area, therefore to note a few things so that participants are more competent and professional training, namely:

    
What must be done first in Server Administration on network-connected local network?
    
How to administer the server in the connected network area network (WAN)?
    
Is the problem diagnosis Server Administration on network and installation of server devices connected local network or area is in compliance with the rules and whether the system can work properly?

b. Supplies To Be Prepared

To support the tasks you want to do, then prepare all the equipment required in accordance with the type of task on each learning activity.


c. Training results

You will be able to perform the task / job problems Server Administration on network connected network.

2. Role of Teachers

Teachers who will teach this module should prepare as well as possible strategies that cover all aspects of learning, mastery of materials, selection of methods, tools and device evaluation learning media.

D. FINAL DESTINATION

After studying this module, the training participants are expected to competently and professionally perform the task / job of administering a server on the network according to the needs at hand.


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Appliance Repair Computer Peripherals

Appliance Repair Computer Peripherals

Appliance Repair Computer Peripherals, Peripherals computer is a support equipment from a PC. Sometimes peripherals are not working or damaged functions. For that we need to do repairs on the pheriferal. Before improvement, should be drawn up preparatory measures following improvements:


    
Preparing for assistive devices used to repair,
    
Diagnose the damage that occurred,
    
Find out how to make improvements such pheriferal,
    
Make improvements to peripherals
Meanwhile, to make improvements to peripherals, it takes some tools or tool-kit as follows:

    
Screwdriver
    
pliers
    
Brush
    
Dry cloth or tissue and cleaning fluid
    
Mini vacuum cleaner / vacuum cleaner
In this case also requires some theory supported pheriferal improvements that can be obtained on a networked computer engineering module
Equipment needed for the improvement of peripherals
a) Screwdriver
Screwdriver is the most important tool in the improvement of peripherals. Screwdriver is very useful to dismantle and install peripherals to be further improvements. Screwdriver there are many different forms. Starting from a screwdriver (+), screwdriver (-), and a screwdriver stars / flowers. To make improvements to peripherals need to be prepared screwdrivers of various sizes.
b) TangTo make improvements to peripherals, use pliers combination pliers and shark. Tang shark is widely used to hold the head of a small screw or jumper.
c) Brush
Brushes used to clean the peripheral components from dust and dirt that cause damage. Because of the dirt often caused peripherals may not work well anymore.
d) The vacuum cleaner mini
Mini vacuum cleaner with a brush similar functions, namely to remove dirt on peripherals. At the end of the mini vacuum cleaner is equipped with a variety of brush sizes meant to correspond to the narrowness wide angles on peripherals. This tool is ideal to use to clean the dirt found on a keyboard, monitor and fentilasi air at the fan.
e) a dry cloth or tissue and cleaning fluid
Dry cloth or paper towels used to clean the dirt that may be very difficult to clean with a brush or vacuum cleaner. Dirt or dust that is very thick can hinder performance peripherals. Tissue can also be used to facilitate the flow of ink in the printer cartridge injek, because it is easy to absorb liquid. While the cleaning fluid can be used to clean the screen, casing, body monitor, and the printer body.

Summary
1) Before improvement, should be drawn up preparatory measures following improvements:

    
Preparing for assistive devices used to repair,
    
Diagnose the damage that occurred,
    
Find out how to make improvements peripherals,
    
Make improvements to peripherals
2) To make improvements to peripherals, it takes some tools or tool-kit as follows:

    
Screwdriver
    
pliers
    
Brush
    
Dry cloth or tissue and cleaning fluidTool Repairs Computer Peripherals are already mentioned in the report can help you dalammerawat or perform repairs on your pheriferal.

History of Computer Operating Systems

History of Computer Operating Systems

History of Computer Operating Systems, eperti the case with all of us there is also a generation or time-mass development, as well as the computer operating system. The history of computer operating systems are also studied by the student smk tkj on the computer or computer network engineering module, for studying the history of the main material on this subject is very important

The history of the computer operating system has developed very rapidly, and is divided into four generations, namely:

    
First generation (1945-1955)
The first generation is the beginning of the development of electronic computing systems as a replacement for mechanical computing systems. In this generation there is no operating system, the computer system was instructed to do directly.


    
Second Generation (1955-1965)
The second generation introduced the Batch Processing System, the job is done in a series, and then executed sequentially. In this generation computer system is not equipped with the operating system, but some of the functions of operating systems already exist, for example, the operating system functions are FMS and IBSYS.

    
Third Generation (1965-1980)
In this generation the development of operating systems developed to serve many users at once, where the users interactive communication through the terminal on-line to a computer, the operating system into a multi-user (used many users at once) and multi-programming (serving many programs at once ).

    
Fourth Generation (Post 1980)
Today the operating system used for computer networks where users aware of the existence of computers that are connected to each other.

Well just as above that History is not that simple any computer operating system we use now. Hopefully this short article can help you in knowing the history of computer operating systems.


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How to Exercise Care Peripherals

Peripheral Perform CarePerform maintenance peripheral module on network theory and computer engineering or lab that discusses the steps necessary for the treatment of peripheral begin the necessary preparations to reporting treatment results peripherals.
This module consists of four (4) learning activities, which discusses setting up peripherals care, treatment peripherals, check the peripheral treatment results and perform corrective action and report the peripheral treatment. With this module are expected to master the training participants were able to perform maintenance peripherals.
B. PREREQUISITES
Starting capabilities required for studying this module are:

    
Training participants have passed the module / training material Make improvements peripherals (HDW.MNT.204. (2) .A)
    
Training participants know the configuration and specification of PC peripherals.
    
Training participants know how the components / modules that need treatment.
    
Training participants know the objectives, procedures and how to use the equipment for maintenance.
C. INSTRUCTIONS FOR USE MODULE
1. Instructions for Students
Students are expected to actively participate and interact with learning resources to support it, because it must be considered some of the following:
a. Steps - Step Learning
To become more competent and professional in peripheral maintenance work, then you have to look at some of the following:

    
What should be prepared to perform maintenance peripherals?
    
What to do in the treatment of peripheral?
    
How to check the treatment results of peripherals physically or use a utility software?
    
How to take corrective action and make a report peripherals care?
b. Supplies To Be Prepared
To support the safety and smoothness of tasks you want to do, then prepare all the equipment required in accordance with the type of task on each learning activity.

c. Training results
You will be able to perform tasks / maintenance work peripherals.

2. Role of Teachers
Teachers who will teach this module should prepare as well as possible strategies that cover all aspects of learning, mastery of materials, selection of methods, media learning tools, and device evaluation.

D. FINAL DESTINATION

    
Training participants are able to prepare equipment for the treatment of peripheral
    
Training participants are able to perform maintenance peripherals
    
Training participants are able to check the results of treatment of peripheral
    
Training participants are able to take corrective action and report the results of treatment of peripheral

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