Servicing consumer electronics products and systems-cherrylyn

WEB SCRIPT Electrical and Electronics
Sector: Electronics Products Assembly and Servicing NC II
Qualification: Service Consumer Electronics Products and Systems
Unit of Competency: Servicing Consumer Electronics Products and Systems
Module Title: LO5: Re-assemble and test repaired consumer electronic product
Learning Outcomes: Cherrylyn Manalo
Developer/s:

TITLE Re-assembling and testing repaired consumer electronic product
OBJECTIVES
Topic 10 In this lesson the learners will be to re-assemble and test repaired consumer
INTRODUCTION electronic product and proper handling of waste materials

Reassemble and test of repaired consumer electronic products

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In almost every home there are horde of appliances that practically remain in use throughout the day
to provide us the comfort the easiness of life that we deserve. We are really grateful to these
appliances which are necessarily of every home. And if you are grateful to such appliances then you
must take care for them too. The breakdown of electrical domestic devices is inevitable as machines
after a long run tend to break down. At times they break down early due to misuse or overuse. The
electrical appliances like mixer/grinder, geyser.

The electronic equipment repair service industry is one of those few industries that can benefit from
the weak economic condition of the particular region or even benefit from the weak financial position

of an individual. Companies in this industry are involved in maintenance or repairing of electronic
devices like mobile phones, computers, photocopying machines, refrigerators, video recording
equipment, specific instruments, medical devices, radar equipment, and television sets stereos. The
companies in this market target people owning high –end electronic systems and cannot afford to
replace them but find it cost effective to get them repaired.

The market segmentation of electronic equipment repair service industry depends on the electronic
products to which the services are offered. A few of them include consumer electronics repairs,
computer and office equipment repairs; communication equipment repairs and other electronic
equipment (including medical) repair. Some of the major services offered by players in this market are
repairing and maintenance of stereo equipment, photographic equipment, optical instruments,
television sets and dental equipment. However, a major roadblock in the progress of this service is
that due to constant innovation and technological advances, consumers are usually tempted to
replace the gadgets with new ones. However, high end electronic items like LCDs, LED will continue
to generate demand for service industry as repairing cost is compared to replacing the equipment
with new ones.

There is a huge competition among the start-ups in this line of business. The success ratio largely
depends on the quality of work and technically skilled professionals with sound knowledge of
products. The marketing strategies that are implemented by these start-ups are newspaper ads, radio
ads, billboards, referrals, website banners, yellow pages, discounts and direct mailers.

Lesson 1 Re- Assemble and test repaired consumer electronic product

RE- ASSEMBLE CONSUMER ELECTRONIC PRODUCT

To begin reassembly, reverse the order in which you took the machine apart. When the unit has
multiple boards, you'll need to get the inner ones reinstalled first. If a board that'll wind up under
another board has connectors, put the cables in before covering up that board. In older gear, take a
look at the ground lands on circuit boards, where the screw or the metal bracket makes contact. They
exist to connect those points to ground via the chassis, and a poor connection due to oxidation or
corrosion can seriously affect the product's performance. Clean them up with some contact spray or,
in extreme cases, fine sandpaper. Make sure the screws are tight, so contact will be reliable, but don't
overtighten to the point that you might crack the board. Heating and cooling in larger items, and
physical stress in portable devices from being bounced around, can cause cracks later on if the
screws are extremely tight.

Insert ribbon cables into their sockets carefully. It isn't hard to put them in wrong, which can lead to
anything from no operation to circuit damage. Most ribbons have bare conductor fingers only on one
side. If you get one of those in upside-down, the product won't work, but it's unlikely to cause damage
unless the socket has U-shaped contacts that touch both sides of the ribbon. There are some like
that.
Those nasty hidden snaps are much easier to close than they were to open! Line them up carefully
and apply pressure until they pop into place. The edges of the case should fit smoothly. If there's a
bulge, either the snap isn't all the way in or a wire is caught underneath.
Sometimes a case has to be snapped together at one end before the other, even if it didn't come
apart that way. Look at the style of snap, and how it fits together should be apparent. If you get it
wrong, you might break a snap, but it's not a big deal. Heck, they can break even when everything is
done right. Often you can live without one or two. If a snap's loss makes the case wobbly, it might be
worth some careful repair with your plastic-melting iron. Be sure to pop the case apart first; trying to
melt plastic near the outside will almost certainly result in very visible damage. Even from a half-inch

away, the iron puts out enough heat to soften and deform many plastics. A repaired snap is weak, so
you may get only one chance to close up the case properly.
Still, it's better than nothing. If you hear something floating around inside the unit after you finish
putting it together, the snap has broken off. Open the case and remove the plastic piece.
Screws should be reinstalled carefully to avoid damaging them or the plastic into which they are
screwed. Phillips screw heads are especially easy to strip, and trying to remove one is mighty
frustrating once you do. Insert all the screws in a layer, or on the outside of the case, but don't tighten
them down before the last one in that layer is in its hole. Sometimes you'll need to remove one
because it's the wrong length or you suddenly realize the black one went here and the silver one over
there. Or, an internal bracket doesn't quite line up and you need to open the case again before going
on. Once you have them all in, it's time for the final tightening.
Hold the screwdriver with your fingers, not in your palm. Turn the screws just until they stop, and snug
them in ever so slightly. That's it. Don't twist until you can't twist any farther.
If everything fits together well, you should be ready to fire up the unit and consider your repair
complete.

TEST REPAIRED CONSUMER ELECTRONIC PRODUCT

Functional testing should be completed both before and after a repair to identify problems with the
product. Tests are conducted to ensure that the repaired product physically works the way it was
intended and that all required software menu options are present and functioning. It also ensures that
the product conforms to the industry standards relevant to that environment.

Once the corrective action is taken, the troubleshooter should verify that the trouble has been
corrected. This usually involves rechecking the same indications that proved there was a problem.
This time though, the checks should prove that a problem does not exist. This step should be
thorough. If there are both an abbreviated procedure and an expanded procedure for checking the
equipment, use the expanded procedure. This helps ensure that the problem no longer exists and did
not mask another problem. During this verification, the following should be observed:

 Check all indications that relate to the repaired area.
 Perform a valve/switch line-up check to validate the integrity of the system.
 Using approved procedures, establish normal operating conditions and check equipment

performance.
 Check for abnormal operation of all inputs and outputs to the repaired equipment.
By thoroughly verifying the proper operation of the repaired equipment, the troubleshooter can be
relatively sure the problem has been resolved correctly.

Sources:
https://www.industrial-electronics.com/Diagnose-Repair-Elec_0.html
https://www.myodesie.com/wiki/index/returnEntry/id/2956#Step%204:%20Verify%20That%20the%20
Problem%20Has%20Been%20Corrected

QUIZ : TRUE OR FALSE

________1. When the unit has multiple boards, you'll need to get the inner ones reinstalled first.
TRUE

________2. Screws should be reinstalled carefully to avoid damaging them or the plastic into which
they are screwed. TRUE

________3. Testing should be only done before a repair to identify problems with the product.
FALSE

________4. Tests are conducted to ensure that the repaired product physically works the way it was
intended and that all required software menu options are present and functioning. TRUE

________5. Check for abnormal operation of all inputs and outputs to the repaired equipment. TRUE

Topic 2 Proper handling of waste materials
Lesson 1 Environmental Requirements

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Waste management is the process of treating wastes, and it offers a variety of solutions for recycling
items that don’t belong in the trash. This is a process that each and every household and business

owner in the world needs. Waste management disposes of the products and substances that you

have used in a safe and efficient manner.

1.1 Proper disposal of chemicals and components shall be based on existing
requirements of the law and chemical waste management

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1. Evaluate your waste – to be able to handle the waste properly, the company first needs to
determine whether the waste is hazardous or not, and whether handling of that particular waste is
regulated by legislation. This step is often called classification or categorization of the waste.

2. Store your waste – depending on the type of waste, there will be different requirements in terms of
storage facilities. Waste can be in solid or liquid form, so it is important to store it according to its
characteristics. Hazardous waste must be stored in a sturdy, leak-proof container that is kept closed
when not adding or removing waste. Different kinds of waste may require different types of storage
containers. The container must be labeled with the words “Hazardous Waste“, a clear description of
the contents, and the date when the waste is first placed in the container. Containers must be stored
on an impermeable surface with enough aisle space to allow for weekly container inspections.
Additional requirements for outdoor storage include:

 Controlling access to the containers
 Protecting the containers from the elements
 Storing containers of liquid waste on a curbed and impermeable surface to contain accidental

leaks

3. Label the waste – nonhazardous waste doesn’t have to be labeled in any special way. On the other
hand, hazardous waste labeling is often prescribed by law and in most countries, the company must
obtain a license for even generating some kinds of hazardous waste. The label for marking packed
hazardous waste usually contains the following information:

 Warning: HAZARDOUS WASTE
 Information about the waste owner who packed the waste: name, address, telephone, date of

packaging, name and surname of the person qualified to be responsible for that job
 Physical characteristics of the waste: powder, solid, viscous substances, pastes, sludge, liquid

substance, gaseous substances

4. Transport and dispose your waste properly – the company is responsible for its hazardous waste
forever. To help ensure that hazardous waste is transported and disposed of properly, and to reduce
your liability, choose a transporter that fulfills the following requirements:

 Has a hazardous waste identification number
 Is currently licensed or permitted as a hazardous waste transporter
 Has fulfilled specific training requirements
 Maintains adequate liability insurance
 Carries credentials in the vehicle
 Transports the waste to a permitted hazardous waste facility

1.2 Proper disposal of Non-biodegradable parts or materials

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Recycling
Separate glass, plastic and metal from other non-biodegradable waste for recycling. Many urban and
suburban areas have curbside recycling programs; if such a program is not available, take recyclable
materials to the nearest collection facility for processing. Recycling saves space in landfills and
reduces the amount of virgin materials that must be mined or manufactured to make new products,
saving energy and reducing global climate change in the process.

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Combustion
Some non-biodegradable waste like used rubber tires and plastic can be burned at combustion
facilities. Most of these facilities use the heat generated by incineration to make energy in the form of
steam or electricity, which reduces their demand for other nonrenewable resources, including coal
and petroleum.

Source: www.conserve-energy-future.com

https://www.conserve-energy-future.com/causes-effects-solutions-of-landfills.php

Landfills
Landfills provide long-term storage for non-biodegradable waste. Ideally, landfills are carefully
situated to prevent contamination from entering surrounding soil and water, and managed to reduce
odor and pests as much as possible.
1.3 WEEE requirements

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Waste Electrical and Electronic Equipment Regulation (WEEE) is a directive in the European Union
that designates safe and responsible collection, recycling and recovery procedures for all types of
electronic waste.
If improperly disposed, electronic waste like old computers, mobile phones and kitchen appliances
can pose environmental and health risks from exposure to lead, mercury and other heavy metals. The

WEEE regulation aims to reduce these risks by providing a safe way to get rid of these materials.
Eventually, WEEE will phase out dangerous materials in exchange for safer alternatives.
Under these regulations, manufacturers of specified disposal equipment are directly responsible for
the disposal of electronic waste. These companies must meet collection targets, collecting 65% of
the average weight of electronics placed on the market in the previous two years.

Sources: https://advisera.com/14001academy/blog/2016/11/07/7-steps-in-handling-waste-according-
to-iso-14001/
https://homeguides.sfgate.com/disposal-nonbiodegradable-waste-79582.html

QUIZ : IDENTIFICATION
Direction: Identify the following.
________1.What does WEEE stand for?

________2. Provide long-term storage for non-biodegradable waste

________3. Saves space in landfills and reduces the amount of virgin materials that must be mined
or manufactured to make new products, saving energy and reducing global climate change in the
process.

________4.The process of treating wastes, and it offers a variety of solutions for recycling items that
don’t belong in the trash.
________5. Is the most formal form of reviews, strategy adopted during the static testing phase

Video Handling of hazardous chemicals or substances or Chemical safety |
Watch Video Green World Group

Moodle Question: TRUE or FALSE

_____________1. For Proper Storage of Flammable Chemicals, ensure that storage areas meet
regulatory requirements.
_____________2. Never eat drink or smoke while using hazardous chemicals
_____________3. Smell or taste a chemical to identify it.
_____________4.For general safety know all emergency procedures and equipment
_____________5. Always use hazardous chemicals as intended

Moodle Answer:
1. TRUE
2. TRUE
3. FALSE
4. TRUE
5. TRUE

Video Waste Electrical and Electronic Equipment
Watch Video

Moodle Question: TRUE or FALSE

_____________1. Republic Act 9696 is Toxic Substances and Hazardous and Nuclear Wastes
Control Act

_____________2 Broken, spent, obsolete and unwanted electronic electrical products requiring
disposal become a waste or electronic waste

_____________3. If improperly managed such as through improper disposal, dismantling or
burning can result in the release of harmful chemicals in to the environment.

_____________4. Ideally a waste should be returned to its manufacturer for proper
management

_____________5. Studies reveal that PBDEs can also be found in breast milk of mothers
exposed to the chemical

Moodle Answer:

1. FALSE
2. TRUE
3. TRUE
4. TRUE
5. TRUE