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REPAIR PHOTOCOPY MECHINE

How to Become a Copier Technician in 5 Steps Explore the career requirements for copier technicians. Get the facts about salary, trainin...

Jumat, 25 Desember 2015

REPAIR PHOTOCOPY MECHINE

How to Become a Copier Technician in 5 Steps

Explore the career requirements for copier technicians. Get the facts about salary, training requirements and career outlook to determine if this is the right career for you. Schools offering Computer Support Technician degrees can also be found in these popular choices.
Most copier technicians enter the field with some formal training in electronics. Read more about this technical field in the table, and get information about the employment outlook for this career.
Training RequiredPostsecondary education is preferred
Education Field of StudyMachine repair, electronics
Key SkillsTroubleshooting, physical stamina, interpersonal, analytical
CertificationCertification is voluntary
Job Growth (2012-2022)4% (for all computer, ATM and office machine repairers)*
Median Salary (2013)$36,390 (for all computer, ATM and office machine repairers)*
Source: *U.S. Bureau of Labor Statistics

What Is a Copier Technician?

Copier technicians are responsible for the installation, maintenance and repair of office equipment, including copy machines, fax machines and printers. They routinely travel to stores and offices for service calls, where they conduct tests to determine if equipment is functional and in good working order. If equipment isn't functional, they may consult with employees to obtain detailed information about a malfunction, disassemble equipment, identify the source of problems, repair or replace damaged components, reassemble equipment, reinstall software and test their repairs. Finally, they maintain records of each visit and the maintenance work performed.

Step 1: Develop Your Electrical and Mechanical Aptitude

Shop classes in middle school and high school provide a formalized setting in which to disassemble and reassemble motors and engines, and create basic electronic circuits from discrete components. High school physics courses teach you fundamental mechanical principles. Self-directed exploration can help you become familiar with hand tools and devices.

Step 2: Earn an Associate's Degree in Electronics

Most employers prefer to hire technicians who have an associate's degree in electronics, although you may be able to find entry-level positions with a certificate. Electronics programs are widely available from private schools and community colleges. Programs provide a background in electronics theory and lab courses that allow you to put theory into practice and experiment. Topics covered might include basic circuits, circuit design, digital logic and programmable controllers.

Step 3: Obtain Certification

While it isn't mandatory, certification can improve your chances of gaining employment. The International Society of Certified Electronics Technicians (ISCET) offers several credentials that establish your knowledge of electronics and electronic devices. CompTIA offers the CompTIA PDI+, which establishes your competence to service document imaging and printing devices.
ISCET certifications relevant to copier technicians include the associate level electronics CET, the Electronics Systems Associate (ESA) and the Customer Service Representative (CSR). The electronics CET exam covers basic electronics, transistors, DC and AC circuits, troubleshooting and mathematics. The ESA exam is a 4-part test covering AC circuits, DC circuits, semiconductors and digital logic. The CSR exam tests your knowledge of interpersonal communication, feedback and response, conflict resolution, ethical behavior and the legal obligations of service reps.
The CompTIA PDI+ certification exam tests your knowledge of print engines, scanning processes, color theory, networking, tools and basic electromechanical components. Professional behavior, customer service and safety are also covered as soft skills. CompTIA recommends that you have a background working with printers and copiers, but otherwise has no prerequisites for the exam.

Step 4: Obtain Employment

According to the U.S. Bureau of Labor Statistics, approximately 110,850 people worked as computer, automated teller, and office machine repairers in 2013. Employment in this category was projected to rise 4% from 2012 to 2022. Specific figures for copier technicians weren't available.
Your potential employers include commercial equipment wholesalers, office supply retailers, electronic equipment repair services, and electronics and appliance stores. The increased reliability of remote diagnostic software will diminish the need for technicians, thus limiting your opportunities when existing workers retire or change jobs.

Step 5: Advance Your Career

Your advancement options include broadening the range of devices you service, transitioning into customer service and sales, or establishing your own repair business. Further education at the bachelor's degree level may help with the first option. Transfer programs are available that allow you to apply your associate's degree credits towards a 4-year degree in electronics engineering or related subjects. If you establish your own business, additional courses in management, administration and marketing may improve your chances of succeeding.


Printer and Photocopier Troubleshooting and Repair Collection

Version 2.79 (13-Feb-13

Copyright © 1996-2013
Samuel M. Goldwasser
--- All Rights Reserved ---

For contact info, please see the Sci.Electronics.Repair FAQ Email Links Page. 


Reproduction of this document in whole or in part is permitted if both of the following conditions are satisfied:
  1. This notice is included in its entirety at the beginning. 
  2. There is no charge except to cover the costs of copying.

Table of Contents

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Kamis, 24 Desember 2015

TECNICIAN AIR CONDITIONING

Central air conditioners have two separate components: the condenser and the evaporator. The condenser unit is usually located outside the house on a concrete slab. The evaporator coil is mounted in the plenum or main duct junction above the furnace.
Most central air conditioners are connected to a home's forced-air distribution system. Thus, the same motor, blower, and ductwork used for heating are used to distribute cool air from the air conditioning system. When a central air conditioner is operating, hot air inside the house flows to the furnace through the return-air duct. The hot air is moved by the blower across the cooled evaporator coil in the plenum and is then delivered through ducts to cool the house. When the air conditioner works but the house doesn't cool, the problem is probably in the distribution system.

Both the evaporator and the condenser are sealed. Therefore, a professional service person should be called for almost any maintenance other than routine cleaning. Central air conditioners should be professionally inspected and adjusted before the beginning of every cooling season. However, don't let your maintenance end with this annual checkup. While there aren't many repairs you can make yourself, there are specific maintenance procedures you can follow to keep your system operating at peak efficiency. 

Caution: Before doing any work on an air conditioning system, make sure the power to the system, both to the condenser and to the evaporator assembly, is turned off.

Before you start working, let's try to narrow the scope of the job. Look for the problem you're having, and its solution, on the chart on the next page.

Troubleshooting Central Air Conditioners

Central air conditions will need some professional maintenance, but there are many minor problems that you can easily fix yourself. If your central a/c unit isn't working properly, look for the problem you're experiencing on this chart and see if it's a do-it-yourself job.
CENTRAL AIR CONDITIONER TROUBLESHOOTING CHART
Problem 
Possible cause 
Solution 
Condenser
doesn't run

  
1. No power.


 
1. Check for blown fuses or tripped
    circuit breakers at main entrance
    panel or at separate entrance
    panel; restore circuit. 

2. Thermostat set
    too high.
2. Lower thermostat setting 5°.

3. Motor faulty. 
3. Call a professional. 

4. Compressor
    faulty. 
4. Call a professional.
 
Uneven cooling

 
1. Distribution
    system out of
    balance. 
1. Balance system.

 
Inadequate
cooling 
1. Thermostat set
    too high. 
1. Lower thermostat setting 5°.

2. Evaporator dirty. 
2. Clean evaporator 

3. Unit too small.
 
3. Replace with larger unit;
    call a professional. 
Unit doesn't
1. Thermostat set
1. Lower thermostat setting 5°.
cool 
    too high.


2. Condenser dirty. 
2. Clean condenser coil and fins; 


    if necessary, straighten fins. 

3. Condenser unit 
3. Remove debris blocking condenser; 

    blocked. 
    cut down weeds, grass, and vines. 

4. Evaporator dirty. 
4. Clean evaporator.

5. Compressor faulty. 
5. Call a professional. 

6. Not enough
    refrigerant in system.
6. Call a professional.
 
Condenser unit
turns on and
off repeatedly 
1. Condenser dirty.
2. Condenser unit
    blocked.  
1. Clean condenser coil and fins.
2. Remove debris blocking condenser;
    cut down weeds, grass, and vines.  

3. Evaporator dirty.
3. Clean evaporator.



A dirty evaporator is a common problem. On the next page you'll learn how to access the evaporator and clean it properly.

Cleaning the Evaporator

The evaporator for the central air system is located directly above the furnace in the plenum. The evaporator may not be accessible, but if it is, you should clean it once a year. If the plenum has foil-wrapped insulation at its front, you can clean the evaporator; if the plenum is a sealed sheet metal box, do not attempt to open it. Here's how to clean an accessible evaporator:

Step 1: Remove foil-wrapped insulation at front of plenum; it's probably taped in place. Remove tape carefully, because you'll have to replace it later. Behind insulation is access plate, which is held in place by several screws. Remove screws and lift off plate.
What You'll Need
You'll want to have these tools on hand to clean the evaporator: 
·                                 Screwdriver
·                                 Stiff brush
·                                 Large hand mirror
·                                 Household bleach
·                                 Wire
Step 2: Clean entire underside of evaporator unit with stiff brush. A large hand mirror can help you see what you're doing. If you can't reach all the way back to clean entire area, slide evaporator out a little. Evaporator can be slid out even if it has rigid pipes connected to it, but be careful not to bend pipes.

Step 3: Clean tray below evaporator unit. This tray carries condensation away from evaporator. Pour 1 tablespoon of household bleach into weep hole in tray to prevent fungus growth. In extremely humid weather, check condensate drain and pan every other day. If there's much moisture in pan, weep hole from pan to drain line may be clogged. Open weep hole with piece of wire.

Step 4: Put unit back into place, reinstall plate, and tape insulation back over it.

Step 5: Turn back on air conditioner, and check for air leaks. Seal any leaks with duct tape.

Cleaning the Condenser

In most air-conditioning systems, the condenser unit is located outside the house and is prone to accumulate dirt and debris from trees, lawn mowing, and airborne dust. The condenser has a fan that moves air across the condenser coil. You must clean the coil on the intake side, so, before you turn off the power to the air conditioner, check to see which direction the air moves across the coils. Here's how to clean the condenser:
What You'll Need
You'll want to have these tools on hand to clean the condenser:
·                                 Grass shears or pruners
·                                 Spray bottle of coil cleaner
·                                 Soft brush
·                                 Fin comb
·                                 Carpenter's level
·                                 Pry bar or piece of 2-by-4
·                                 Gravel or rocks
Step 1: Cut down any grass, weeds, or vines that have grown around condenser unit; they could be obstructing airflow.
Step 2: Clean condenser with commercial coil cleaner, available at refrigerator supply stores. Instructions for use are included. Flush coil clean (do not use hose); let dry.

Step 3: Clean fins with soft brush to remove accumulated dirt. You may have to remove protective grille to reach them. Do not clean fins with garden hose, as water could turn dirt into mud and compact it between fins. Clean fins very carefully: They're made of light-gauge aluminum and are easily damaged. If fins are bent, straighten them with fin comb, sold at most appliance parts stores. A fin comb is designed to slide into spaces between fins. Use it carefully to avoid damaging fins.

Step 4: Check concrete pad on which condenser rests to make sure it's level. Set carpenters' level front to back and side to side on top of unit. If pad has settled, lift pad with pry bar or piece of 2 x 4, then force gravel or rocks under concrete to level it.
During the fall and winter, outside condenser units should be protected from the elements to prevent leaf blockage and ice damage. Cover the condenser unit with a commercial condenser cover made to fit the shape of the unit or use heavy plastic sheeting secured with sturdy cord.

If you've cleaned everything you can and you're still not getting cool air, the problem could be the refrigerant. Learn what to do in that case on the next page.
by .howstuffworks
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Selasa, 17 September 2013

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