Epas Revised CBLM

Republic of the Philippines
TECHNICAL EDUCATION AND SKILLS DEVELOPMENT AUTHORITY
Sector: ELECTRONICS
Qualification: ELECTRONIC PRODUCTS ASSEMBLY&
SERVICING NC-II
Unit of Assemble Electronic Products
Competency:
Module Title: Assembling Electronic Products
Code No. Unit of Competency Developed by: Date Date Page

Assemble Electronic Developed Revised No.
Products ZUKARNIN A. BASILAN
10/13/2014
HOW TO USE THIS LEARNER’S GUIDE
Welcome to the learner’s guide for the module: Assemble electronic
products. This learner’s guide contains training materials and activities for you to
complete. The unit of competency “ASSEMBLE ELECTRONIC PRODUCTS”
contains the knowledge, skills and attitudes required for an Electronic Products
Assembly & Servicing NC II. It is one of the Basic Modules at National Certificate
Level (NC II).
You are required to go through a series of learning activities in order to

complete each learning outcomes of the module. In each learning outcomes there
are Information Sheets, Resources Sheet and Reference Materials for further
reading to help you better understand the required activities. Follow these activities
on your own and answer the self-check at the end of each learning outcomes.
Recognition of Prior Learning (RPL)
You may have some or most of the knowledge and skills covered on the learner’s
guide because you have:
 Been working for some time.
 Already completed training on this area.
If you can demonstrate to your Instructor that you are competent in a particular skill,
you don’t have to do the same training again. If you feel you have some skills, talk to
your instructor about having them formally recognized. If you gave qualification or
certificates of your competency from previous training, show it to your Instructor. If
the skill you acquired is still relevant to the Module, they may become part of the
evidence you can present to RPL.
At the end of this learner’s guide is a learner diary, use this diary to record important
dates jobs undertaken and other workplace events that will assist you in providing
further details to your Instructors or Assessors. A Record of Achievement is also
provided for your Instructor to complete once you have completed the Module.
This Module was prepared to help you achieve the required competency in Using
hand tools. This will be the source of information for you to acquire knowledge and
skills in this particular trade, with minimum supervision or help from your Instructor.
With the aid of this material you will acquire the competency independently and at
your own pace.
 Talk to your Instructor and agree on how you will both organize the Training of
this unit. Read through the learning guide carefully. It is divided into sections,
which cover all the skills, and knowledge you need to successfully complete in
this module.
 Work through all the information to complete the activities in each section.
Read Information Sheets and complete the Self-check. Suggested references
are included to supplement the materials provided in this module.

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 Most probably your Instructor will be your supervision manager. He/she is
there to support you and show you the correct way to do the things. Ask for
help.
 Your Instructor will tell you about the important things you need to consider
when you are completing the activities and it is important that you listen and
take notes.
 You will be given plenty of opportunity to ask questions and practice on the
job. Make sure you practice your new skills during regular work shifts. This
way you will improve both your speed, memory and also your confidence.
 Talk to more experience workmates and ask for their guidance.
 Use the Self-check questions at the end of each section to test your own
progress.
 When you are ready, ask your Instructor to watch you perform the activities
outline in the learning guide.
 As you work through the activities, ask for written feedback on your progress.
Your Instructor keeps feedback/ pre-assessment reports for this reason.
When you have successfully completed each element, ask your Instructor to
mark on the reports that you are ready for the assessment.
 When you have completed this module (several modules) and feel confident
that you have had sufficient practice. Your Instructor will arrange an
appointment with registered Assessor to assess you. The results of your
assessment will be recorded in your Competency Achievement Record.

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Qualification: Electronic Products Assembly & Servicing NC II
Unit of Competency: ASSEMBLE ELECTRONIC PRODUCTS
Introduction:
This module contains information and suggested learning activities on

Using Hand Tools. It includes instructions and procedure on how to use
hand tools.
This module consists of three (5) learning outcomes. Each learning

outcome contains learning activities supported by instruction sheets. Before
you perform the instructions, read the information sheets and answer the
self-check and activities provided to ascertain to yourself and your
instructor that you have acquired the knowledge necessary to perform the
skill portion of the particular learning outcome.
Upon completing this module, report to your instructor for

assessment to check your achievement of knowledge and skills requirements
of this module. If you pass the assessment, you will be given a certificate of
completion.
Learning Outcomes:
1. Prepare to assemble electronic products.

2. Prepare/ Make PCB modules
3. Mount and solder electronic components
4. Perform electronic products assembly
5. Test and inspect assembled electronic products
Assessment Criteria:
1. Assembly workplace is prepared in accordance with OH&S policies and
Procedures.
2. Established risk control measures for work preparation are followed.
3. Work instructions are obtained and clarified based on job order or client
Requirements.
4. Responsible person is consulted for effective and proper work
Coordination.
5. Required materials, tools and equipment are prepared and checked in
accordance with established procedures.
6. Parts and components needed to complete the work are identified,
prepared and obtained according to requirements
1. 7.PCB layout is verified for conformity with the schematic diagram in
2. accordance with the layout rules
3. 8.PCB layout is transferred to copper-cladded board following acceptable
4. methods and standards
5. 9.Visual inspection is performed based on standards procedures.
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10.Thru-hole is drilled based on standards procedures
11.PCB is cleaned based on standards procedures
12.Functionality of PCB is tested and visual inspection is performed based on
standards procedures
13.Knowledge of lead and lead-free soldering characteristics and requirements are

applied to mounting and soldering process in accordance with OH&S standards
14.Components are mounted and soldered in accordance with soldering
principles.
15.Soldering/Desoldering techniques and procedures are applied in accordance
with established standards and requirements.
16.Soldered products are checked and complied with international standards and
task specifications.
17.Work instructions is followed based on job order or client requirements
18.Assembly procedures are performed in accordance with OH&S policies and
work instructions
19.Modules and accessories are connected/integrated into the final product based
on the client specifications
20,Excess components and materials are disposed of based on WEEE directives
and 3Rs waste management program.
21.Finished products are subjected to final visual/sensory inspection and testing in
accordance with quality standards, procedures and requirements
22.Mechanical and electrical/electronic testing is performed in accordance with
quality standards, procedures and requirements
23.Work completion is documented and responsible person is informed in
accordance with established procedures
24.Housekeeping procedures are observed in accordance with 5S discipline and
established procedures

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TECHNICAL TERMS
 Active State - It is a condition of a semiconductor device that is

working.
 Alternating Current - It is an electric current that is continually

varying in value and reversing its direction of flow at regular interval.
 Anode - It is a positive electrode of semiconductor device.
 Biasing Current - It is a current supply needed by the semiconductor

in order to work properly.
 Capacitance - It is a property that exits whenever two conductors are

separated by insulating material, permitting the storage of electricity.
 Capacitor - A component designed intentionally to have a definite

amount of capacitance.
 Cathode - It is a negative electrode of semi-conductor devices.
 Circuit - An arrangement of one or more complete paths of electron

flow.
 Conductor - A wire, cable, or other body or medium that is suitable

for carrying electric current.
 Couple - To connect two circuits so signals are transferred from one

to the other.
 Current - It is the rate of transfer of electricity from one point to

another.
 Cut-off State - It is a condition of a semiconductor device that is not

working.
 DC Milli-Ammeter - It is an instrument that measures the amount of

direct current flow in a component or circuit.
 Desoldering - It is a process of unsoldering unwanted parts or

components in the circuit with the support of soldering tool.
 Dielectric Material - A material that serves as insulator because it

has poor electric conductivity.
 Direct Current - It is an electric current that flows in one direction.

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 Discrete Components - It is a separated component.
 Junction – It is a hybrid of an electronic circuit enclose in single

package that having an output that varies directly proportional to the
input.
 Ohmmeter - It is an instrument that measures the amount of

resistance in certain component or circuits.
 PCB - It is a Printed Circuit Board or (PCB) which is actually printed

wiring boards that have components inserted into the hole and
soldered to form its circuit connection.
 P-type - Positive type
 Quiescent Point - It is the least amount of operating current of semi-

conductor in order to work properly.
 Resistance - It is the opposition that a component or material offers

to the flow current.
 Resistor - A component designed intentionally to have a definite

amount of resistance.
 Soldering - It is a process of joining two metals caused by heat
 Soldering Technique - It is a right process in which the solder (lead)

is being applied in a connection or in the printed circuit board.
 Splicing - It is defined as a joint that connect two lengths of

conductor.
 Voltage - It is the electrical pressure that existed between two points

and capable of producing a flow of current when a close circuit is
connected between the points.
 Voltmeter - It is an instrument that measures the amount of

electromotive force in a component or circuit.

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Learning Outcome # 1 Prepare to assemble electronic products
1. Assembly workplace is prepared in accordance with OH&S policies and

Procedures.
2. Established risk control measures for work preparation are followed.
3. Work instructions are obtained and clarified based on job order or client
requirements
4. Responsible person is consulted for effective and proper work coordination
5. Required materials, tools and equipment are prepared and checked in
accordance with established procedures
6. Parts and components needed to complete the work are identified, prepared
and obtained according to requirements
References/Resources
1.) Marconi S. Pagarigan, Sharif A. Bandi; Practical Electronics

2.) Benjamin S. Velasco;Electronic Components Testing Simplified
3. Michael Q. Enriquez, Fred T. Gantalao, Rommel M. Lasala; Simple
Electronics
4.) www.wikipedia.com
5.) www.google.com
6.) www.youtube.com

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LEARNING EXPERIENCE/ACTIVITIES
Learning Outcome 1: Choose functional hand tools
Learning Activities Special Instruction
1. Read Information Sheet 1.1.1

Electronic symbols and actual
components and Information
1.1.2. Testing of Electronic
Components
2. Answer the worksheet 1.1.1 and  Try to answer the self-check
worksheet 1.1.2 to determine
without looking at the answer key.
how much you have learned.  For worksheet 1.1.2, Let the
3. Compare your answers with the
instructor check your work for
answer key on the last pages of evaluation.
this module.
4. If you have missed some of the
questions, go over the
information sheet again.
5. If you have any questions or if
you need clarification on the
information, ask assistance
from your teacher or from your
classmate who have finished
this learning outcome (LO).
6. If you have answered all the
questions and perform the
activity, you may proceed to the
next learning outcome (LO).

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INFORMATION SHEET 1.1.1
Electronic Symbols and Actual Components

A.) Resistors – used to resist or control the flow of current in a
circuit. Resistors are likewise used to provide voltage drop.
1. Fixed Resistor – with fixed values, rated from a fraction
of an ohm up tp million ohms. Most common power ratings are
from ¼, 1/2, 1,2,5,10,15 and 20 watts.
Symbol Actual Component
¼ to 2 watts 5 watts to 20 watts
1. Variable Resistor – the rated value can be varied from its minimum
value up to its maximum value. The most common application of
this device is its use as volume control for radio receivers.
B. Capacitors- formerly known as condenser)is a passive electronic

component consisting of a pair of conductors separated by a dielectric
(insulator). When there is a potential difference (voltage) across the
conductors a static electric field develops in the dielectric that stores energy
and produces a mechanical force between the conductors. An ideal
capacitor is characterized by a single constant value, capacitance, measured
in farads. This is the ratio of the electric charge on each conductor to the
potential difference between them.

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1.) Fixed Non-Polarized – Can be connected in a circuit without polarity
consideration. Their usual application is in
audio and RF circuits and as transient
suppressors.
Non-polarized
Capacitor
2.Air-Dielectric Variable or Tuning Capacitor – is made of a set of fixed

Metallic plates (stator) and set of movable plates (rotor) arranged in a such way
That they can mesh with each other without any physical contact. The
Capacitance can be varied by rotating the shaft holding the rotor plates.
3. Trimmer and Padder – are basically of the same class of variable capacitor
since both uses mica or ceramic dielectrics.
A. Trimmer – when connected in parallel with another capacitor, fixed or
variable, for providing extremely small increases in the total capacitance.
B. Padder – when connected in series with another capacitor, fixed or variable

for slightly reducing the total capacitance.
Symbol Actual component

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4. Polarized Capacitor – ere either aluminum electrolytic or tantalum type. They
are connected like a battery with references to polarity of terminals. An
electrolytic capacitor is a type of capacitor that uses an electrolyte, an ionic
conducting liquid, as one of its plates, to achieve a larger capacitance per unit
volume than other types. They are often referred to in electronics usage
simply as "electrolytics". They are used in relatively high-current and low-
frequency electrical circuits, particularly in power supply filters, where they
store charge needed to moderate output voltage and current fluctuations in
rectifier output. They are also widely used as coupling capacitors in circuits
where AC should be conducted but DC should not. There are two types of
electrolytics; aluminum and tantalum.
Electrolytic capacitors are capable of providing the highest capacitance values

of any type of capacitor. However they have drawbacks which limit their use.
The voltage applied to them must be polarized; one specified terminal must
always have positive potential with respect to the other. Therefore they cannot
be used with AC signals without a DC bias. They also have very low
breakdown voltage, higher leakage current and inductance, poorer tolerances
and temperature range, and shorter lifetimes compared to other types of
capacitors.
The tantalum capacitor is a highly reliable type of solid capacitor or

electrolytic capacitor. Surface mount tantalum capacitors are increasingly
being used in circuit designs because of their volumetric efficiency, basic
reliability and process compatibility.
Symbols Actual Components
C. Coils or Inductors- An inductor or a coils is a passive electrical component that

can store energy in a magnetic field created by the electric current passing
through it. An inductor's ability to store magnetic energy is measured by its
inductance, in units of henries. Typically an inductor is a conducting wire shaped
as a coil, the loops helping to create a strong magnetic field inside the coil due to
Ampere's Law. Due to the time-varying magnetic field inside the coil, a voltage is
induced, according to Faraday's law of electromagnetic induction, which by
Lenz's Law opposes the change in current that created it. Inductors are one of
the basic electronic components used in electronics where current and voltage
change with time, due to the ability of inductors to delay and reshape alternating
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currents. In everyday speak inductors are sometimes called chokes, but this
refers to only a particular type and purpose of inductor.
Symbols Actual components
D. Diode – a two terminal device that conducts current more easily in only one
direction. The most common function of a diode is to allow an electric current to
pass in one direction (called the diode's forward direction) while blocking current
in the opposite direction (the reverse direction). Thus, the diode can be thought of
as an electronic version of a check valve. This unidirectional behavior is called
rectification, and is used to convert alternating current to direct current, and to
extract modulation from radio signals in radio receivers
1.) Rectifier diodes – are usually of silicon material and intended for rectification
purposes. Rectification is the process of changing AC voltage to pulsating DC
voltage.
2.) Zener Diode - is a type of diode that permits current not only in the
forward direction like a normal diode, but also in the reverse direction if the
voltage is larger than the breakdown voltage known as "Zener knee voltage"
or "Zener voltage". The device was named after Clarence Zener, who
discovered this electrical property.
A conventional solid-state diode will not allow significant current if it is

reverse-biased below its reverse breakdown voltage. When the reverse bias
breakdown voltage is exceeded, a conventional diode is subject to high
current due to avalanche breakdown. Unless this current is limited by circuitry,
the diode will be permanently damaged. In case of large forward bias (current
in the direction of the arrow), the diode exhibits a voltage drop due to its
junction built-in voltage and internal resistance. The amount of the voltage
drop depends on the semiconductor material and the doping concentrations.
3.) Light Emitting Diode - a p-n device like a rectifier diode except that it is
usually intended to indicate current flow, as a power ON indicator or condition
of a ciruit.
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E.) Fuse – a protective device having a short length of wire that melts when the
current passing through it exceeds its rated value.
F. Integrated Circuit (IC)- electronic device with both the active (diodes and/or
transistor) and passive (resistor and capacitors) components contained in a single
package to perform a complete electronic function
G. Loudspeaker – converts electrical energy to sound energy. It is usually specified

according to power capacity, size and impedance.

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H. Microphone – an electronic device intended to convert sound waves into
electrical signals.
I. Transformer - an electronic/electrical device consisting of two or more coils

coupled together by magnetic induction.
1.) Power Transformer - the usual application is to convert the 220V ac line
voltage into a lower secondary voltage. a device that transfers electrical energy from
one circuit to another through inductively coupled conductors—the transformer's
coils. A varying current in the first or primary winding creates a varying magnetic flux
in the transformer's core, and thus a varying magnetic field through the secondary
winding. This varying magnetic field induces a varying electromotive force (EMF) or
"voltage" in the secondary winding. This effect is called mutual induction.
J. Transistor – an active semiconductor device having three electrodes (terminals).

It could perform a variety of application such as switch, amplifier, oscillator, etc.
NPN PNP

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WORKSHEET 1.1.1: Electronic symbols and Actual components
Learning Outcome
1 Prepare to assemble electronic products
Learning Activity
1. Identify the Electronic symbols and Actual components
____________________________________________________________
Part 1
Direction: On the spaces before each number, identify the different symbols
of electronic components.
_____________1.
_____________2.
_____________3.
_____________4.
_____________5.
_____________6.
_____________7.
_____________8.
_____________9.
____________10.

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Part II
Direction: Match the different hand tools with their actual pictures. Write
the letter of your answer in the space provided
A B
_________ 1. Fixed resistor A. B.
__________2. Variable resistor
__________3. Electrolytic Capacitor C. D.
__________4. Rectifier Diode
__________5. Zener Diode E. F.
__________6. Fuse
__________7. Light Emitting Diode H. I.
___________8. Transformer
___________9. Integrated Circuit J. K.
__________10. Speaker
L. M.

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Assessment Criteria of Worksheet 1.1.1
Score Descriptive Grade
10 Competent
0-6 Not Yet Competent
Answer Key to Worksheet 1.1 part I
1. Transformer 6. Fuse
2. Microphone 7. Fixed Capacitor
3. Resistor 8. Integrated Circuit
4. Zener Diode
5. Fuse
___________9. Integrated Circuit J. K.
__________10. Speaker
L. M.

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Assessment Criteria of Worksheet 1.1.1
10 Competent
Answer Key to Worksheet 1.1 part I
6. Transformer 6. Fuse
7. Microphone 7. Fixed Capacitor
8. Resistor 8. Integrated Circuit
9. Zener Diode
10. Fuse
Answer Key to Worksheet 1.1 part II
1. M 6. E
2. J 7. D
3. I 8. H
4. F 9. C
5. K 10. A

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Resistor
Resistor used to resist or control the flow of current in a circuit. Resistors

are likewise used to provide voltage drop. Resistance values of resistor from
1/4W to 2W are color coded, meaning, their values can be determined by
interpreting the four color bands printed on their body using the chart
below.
Leftmost band Stands for 2nd Represents the Represents the

Color Stands for the Significant digit number of zeros Tolerance
first after the two
Significant digit digits or
multiplier
Black 0 0
Brown 1 1 0
Red 2 2 00
Orange 3 3 000
Yellow 4 4 0000
Green 5 5 00000
Blue 6 6 000000
Violet 7 7 0000000
Gray 8 8 00000000
White 9 9 000000000
Gold * Decimal point is
after the first + 5%
significant digit
* x 0.1
Silver * Decimal point is
before the first +10%
significant digit
* x 0.01
None
+20%
Note: The following colors are not used in the first band of resistors:

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1. Black 2. Gold 3. Silver
Examples
Yellow Orange Green Silver

Violet Gold Black Silver
4 7 000 + 50 X0.0 + 10%

5% 1
47 Kilohms + 5% 50 x 0.01 + 10%
47 K + 5% .5 +10%
Brown Red Brown Green

Black Gold Gray Gold
1 0 00 + 1 8 00000
5% +
1 Kilohms + 5% 5%
1,800,000 + 5%
1 K + 5% 1.8 megohms
1 .8 M + 5%
Color Coded Value Color Bands Maximum Value Minimum Value

R1= .5 +/-5% Green,Black, Silver,Gold .5+0.025=0.525 .5-0.025=0.475
R2=150+/-5% Brown,Green,Brown,Gold 150+7.5=157.5 150-7.5=142.5
R3= 10K+/-5% Brown,Black,Orange,Gold 10K+500=10.5K 10K-500=9.5K
R4=3.9M+/-10% Orange,White,Green,Silver 3.9M+390K=4.29M 3.9M-390K=3.51M
R5=560K+/-10% Green,Blue,Yellow,Silver 560K+56K=616K 560K-56K=504K

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Testing Resistor
Testing Resistors
1.) Read the indicated (color code) value on the resistor’s body.
2.) Set the VOM to the OHM-SCALE, the range within but not way below the indicated
value.
3.) Zero-adjust the ohmmeter by connecting the red and black test leads of the ohmmeter
before measuring the value of the resistor under test.
Good Indication
A resistor is in good condition if its resistance is close to the indicated value.
Defective Indication
1. No meter deflection (infinity) at all ohm scale settings.
-The resistor under test is open.
2. Zero reading (full meter deflection) at all ohm scale settings.
-The resistor under test is shorted.
3. The resistance reading does not reach the tolerance to the indicated value.
-The resistor is change value.
Capacitor
Capacitor is an electronic component that has the ability to store electrical charges or
voltages. Capacitors were called condenser earlier. Capacitor have low resistance to AC. It
means that AC can pass through a capacitor. A signal, for example, is a AC in its form and
it can pass a capacitor. Capacitors have high resistance to DC. In other words they block
DC.
Types of Capacitors according to its form and material

The names of capacitors are taken from the types of material which is used for
insulating the plates in a capacitor. Different types of capacitors are listed below.
1. Electrolytic
2. Mylar
3. Polyester
4. Air
5. Mica
6. Tantalum
7. Ceramic
8. Paper
Another classification of capacitors depends on whether they are non-polar or polarized.

Electrolytic and Tantalum capacitors are polarized. It means that one terminal of a
capacitor is positive and the other is negative. All other types of capacitors are non polar.
The capacitance of all capacitors with the exception of air capacitors is fixed. The
capacitance of air capacitors can be varied manually. A tuning capacitor of a radio receiver
is actually an air capacitor.

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Standard Values of Capacitors
.001 uF .005 uF .002 uF .15 uF

.0012 uF .0056 uF .033 uF .18 uF
.0015 uF .0068 uF .047 uF .2 uF
.0018 uF .01 uF .0057uF .22uF
.002 uF .012uF .056uF .33uF
.0022uF .015uF .068uF .47uF
.0033uF .018uF .1uF .5uF
.0047uF .02uF .12uF .56uF
1uF 22uF 680uF

2.2uF 33uF 1,000uF
3.3uF 47uF 2,200uF
4uF 68uF 3,300uF
4.7uF 100uF 4,700uF
6.8uF 220uF 6,800uF
8uF 330uF 10,000uF
10uF 470uF
Notes:
1. Most ceramic and mylar capacitors are rated at 50V and 100V DC working voltage.
2. Lower value capacitors (.001uF to .068uF) are either ceramic or mylar, while .1uF to
.68 uF can be ceramic, mylar, or electrolytic.
3. Value of capacitors from 0.1 uF to 10,000 uF are usually electrolytic.
4. DC working voltage of electrolytic capacitors are usually
16V,25V,35V,50V,100V,350V and 450V.
5. Values from 1 uF to 10uF are typically used in series with a tweeter to eliminate low
frequency signal (bass)to pass through, allowing only the high frequency signals
(treble)to be reproduced by the tweeter
Mathematical Prefixes
Prefixes Symbol Name Multiplier
femto f quadrillionth 10-15
pico p trillionth 10-12
nano n billionth 10-9
micro µ millionth 10-6
milli m thousandth 10-3
centi c hundredth 10-2
deci d tenth 10-1
deka da ten 101
hecto h hundred 102
kilo k thousand 103
mega M million 106
giga G billion† 109
tera T trillion† 1012
peta P quadrillion 1015

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Substitution and replacement
Each type of capacitor has distinct advantages over the others in characteristics and
qualities. That is why certain types of capacitors are sued only where they are suited best.
From the point of view of servicing replacing a capacitor with another one of different type
may do more harm than good. For example, replacing tantalum capacitor with electrolytic
one will result in instability of the circuit. As a general rule the original type and value of
the replaced capacitor should be retained. If the original value is not available the closest
higher value is chosen. Opting for a lower value may cause trouble particularly in the DC
value is chosen.
Capacitors can also be installed in different circuit arrangements. To compute for the
total value of capacitors with equal voltages and capacitances in series connection the
voltages of capacitors are added while their capacitance is divided by the number of
capacitors in the series circuit. Thus the total value of the capacitors in figure A. will be
50mf/100V.
C1 C2
+ +
100mf/50 100mf/50
V FigureVA
Whereas in parallel arrangement the total value of the capacitor is computed by adding
capacitance of each capacitors while the voltage remains the same. The total value of the
circuit in figure B is 200mf/50V.
C1 + + C2
100mf/50 100mf/50
V V
Capacitor functions
In different circuit arrangements capacitors perform various functions. Depending on
these duties capacitors acquire different names:
1. Filter capacitor
2. Coupling capacitor
3. Bypass capacitor
4. Decoupling capacitor

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Checking capacitors with an ohmmeter
Capacitors are widely used in electronic circuits to block direct

current while allowing alternating current to pass, to filter out interference,
to smooth the output of power supplies, and for many other purposes. They
are used in resonant circuits in radio frequency equipment to select
particular frequencies from a signal with many frequencies.
Checking capacitors is a simple as diode. It is important though that

you understands first, what makes the ohmmeter needle move in the test.
Basically the capacitor can be described as an electronic component which
has the ability to block DC, allow AC to pass through it, store electrical
charge and discharge it. These characteristics of the capacitor are the key to
understanding its function in the circuit. It will discussed later in the text.
After learning fundamentals of the capacitor we can now start
checking it. There are two settings of the needle as shown in figure 28-a.
One is pointed to low resistance (solid line). This low reading is an
indication that current is passing through the ohmmeter. An electrical
charge is being stored in a little space between the plates of the capacitor.
As the space is being gradually filled up less current can get into the
capacitor. This process is illustrated by the needle gradually reversing to
high resistance. Once the space is filled up current stops flowing.
The storing and blocking of current characteristics of a capacitor are

used in the checking of a capacitor. It can be done in a single test but it is
better to do it twice in different polarities. The second test is a confirmation
of the first one.

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As you see in figure 28-b the polarity of the capacitor is opposite to the first
test.
There are three common defects of a capacitor: A-open, B-leaky, C-

short. These defects are illustrated in figure 29.
The infinite (high) resistance as shown in figure 29-a means that no

current is flowing though the meter. This indicates an internally open
capacitor. When a capacitor partly loses its ability to block DC it can be
imagined that the capacitor is having a resistor across it. The resistor serves
as a current path (see figure 30).
Small leakage current is common to an electric capacitor shown in

figure 29-b .Because of this characteristics the use of electrolytic capacitors
is limited to the circuit where slight leakage can be tolerated.
When the needle deflects to low resistance and remains steady shown
in figure 29-c , the capacitor is said to be shorted. The insulator is defective
and there is full contact between the plates.
Selecting the ohmmeter range

To be able to conduct the test of a capacitor properly it is necessary to
know how much current is available from a certain range of your ohmmeter.
Sanwa tester has the following currents: x1-150ma, x10-15ma, x1k -150µa.
The next thing to consider is the value of the capacitor you want to
check. Large value capacitor will need greater charge (more current) that is
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why you have to set the meter to lower range of about x10 or x1k. A smaller
value will need a setting to the highest range of x10K because small values
need very little charge.
Now let us see what happens if the proper range is not used in the
test. Suppose you want to test .01 microfarad capacitor and set the range to
x10. The meter will not deflect at all as shown in figure 31-a. This test
indicates an open capacitor which may be good, because the test range has
not been chosen correctly thus the test is not conclusive. In fact the range is
so high that the small capacitor is charged instantly before the needle could
respond.
For example, there is large capacitor of 1000 microfarad under test in the
range of R- X10K (figure 31-c). The needle of the meter deflects completely
but this does not necessarily mean that the capacitor is shorted because the
range used is too high. The current in x10K range is microampere (µa) and it
takes time to fill up the capacitor probably less than a minute. In this case
the capacitor may seem shorted in the test at first.
TABLE 3
Value of capacitors Suggested R-range
.01-.47 mf R-x10K
1-470 mf R X 1K
1000 mf R x10

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DIODES
Diodes – is a two terminal device that conducts current more easily in only
one direction.
Types of Diode
1. Rectifier Diode - are usually of silicon material and intended for
rectification purposes. Rectification is the process of changing AC
voltage to pulsating DC voltage.
Input Signal Output
Signal
+ -
2. Zener Diode - is a type of diode that permits current not only in the
forward direction like a normal diode, but also in the reverse direction
if the voltage is larger than the breakdown voltage known as "Zener
knee voltage" or "Zener voltage"
3. Light Emitting Diode - a p-n device like a rectifier diode except that
it is usually intended to indicate current flow, as a power ON
indicator or condition.
Checking Diodes
It is important to set the ohmmeter to the proper range while checking

diodes and filter capacitor for DC resistance. Selecting the range depends on
whether the component under test is in circuit or disconnected from it.

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While checking a diode with an ohmmeter we are not interested in an
ohmmic resistance of the diode. Before elaborating on DC resistance let us
first find out what makes the ohmmeter needle deflect and why there is no
deflection when polarity is reversed (figure 22).
The flow of current (conduction) in a rectifier diode is one direction
only. This means that applied current can pass through a diode only if the
polarity of the current corresponds to the polarity of the diode (see figure
23).
Let us get back to the ohmmeter. When set at ohmmeter (resistance)

function your multi-tester operates on a battery. In most Japanese tester,
Sanwa for example, the plus (+), positive (red) is connected to the negative of
the battery. The negative (black) minus (-) probe is connected to the positive
of the battery. This is true only during ohmmeter function. When the
multimeter is at DC function the polarity of the test probes does not change.
Figure 24 shows a simplified circuit of the ohmmeter. The meter is in
series with a battery. The circuit is closed by the test probes being shorted
together. Current flows through the meter as indicated by the deflection of
he meter needle. By now you can see why the test done on a diode is called
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DC resistance. Actually the ohmmeter is acting like an ammeter because it
is in series with the circuit in DC resistance tests. The polarity of the
ohmmeter has to be known because it plays an important role in identifying
unknown polarity of a diode and transistors of both PNP and NPN type.
When checking a diode with an ohmmeter there are two tests to be

performed in order to determine if a diode is good or bad. We say that a
diode is good when two conditions are met. In one test there should be low
resistance (current flow) and if you reverse the polarity in the other test
there should be high resistance (no current flow). If these two conditions are
not met we conclude that the diode bad. Figures 25-abc summarize the
diode tests:
Figure 25-a indicates that the diode under test is good. The positive
test prod of the meter is placed to the cathode and the negative to the anode.
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In this test the diode is forward biased or it ahs low resistance. By reversing
the polarity of the diode: The positive to the anode and the negative to the
cathode, the diode is reversed biased which means high resistance of the
diode.
Both test readings in figure 25-b show high resistance. This means an
internally open element of the diode which results in a defective component.
There are both test readings with low resistances in figure 25-c. This
is an indication of internally shorted diode. Thus we can conclude that this
component is defective.
The deflection of an ohmmeter pointer depends on what range has
been set for measurements. For example, if the ohmmeter is set to range
Rx1 the pointer does not necesarily deflect to the full scale. While if the
range is Rx1K or Rx10K the pointer will deflect to the full scale. The extent
of deflection of a pointer also depends on diodes as various diodes have
different internal DC resistances.
In practice while testing a diode it does now matter which polarity comes first,
forward or reversed. As long as the results of the tests are opposite that is all that matters. The
reason why two tests are needed is that you cannot tell an open or short diode in a single test.
TRANSISTOR
an active semiconductor device having three electrodes (terminals).It

could perform variety of application as switch, amplifier, oscillator, etc. The
Bipolar Junction Transistor (BJT) are designed primarily as amplifier. The
three electrodes are base, collector and emitter.
An electronic device which provides oscillation, amplification, switching
and rectification of electrical current. The principal semiconductor materials
sued are germanium and silicon. Basically, there are two kinds of transistor,
namely; PNP and NPN. “PNP” means positive,negative,positive. “NPN” means
negative, positive,negative.
Typical transistor packages
TO-3 TO-3P(218) TO-3PJ TO-3PL
TO-247 TO- TO- TO-220

220F 220S

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TO-126 TO-202 TO-92 SC-51 TO-52

Identifying PNP or NPN transistor using JAPAN standard tester
NPN transistor
0 0
8
8
E BC
E BC
- + - +
Range:Rx10
Range:Rx10
Reading: Approximately 100Ω Reading: Approximately
100Ω
0
8
0
8
E BC E BC
- + - +

Range:Rx10 Range:Rx10
Reading: Infinite Assemble Electronic Reading: Infinite Developed Revised No.
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0
8
0
8
E BC
E BC
- +
- +
Range:Rx10K Range:Rx10K
Reading: Approximately 100K Reading: Infinite
PNP transistor
0
8
0
8
E BC E BC
- + - +
Reading: Approximately 100Ω Reading: Approximately 100Ω
0
8
0
8
E BC E BC
- + - +
Code No. Infinite
Reading: Unit of Competency DevelopedReading:
by: Infinite Date Date Page
0 10/13/2014
8
0
8
E BC E BC
- + - +
Range:Rx10K
Range:Rx10K Reading: Infinite
Reading: Approximately
100K
Testing the condition of transistor
Shorted transistor
0
8
0
8
E BC E BC
- + - +
Reading: 0Ω Reading: 0Ω
8
0 0
8
E BC E BC
- + - +
Reading: zero ohms Reading: zero ohms
0
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8
0
8
E BC E BC
- + - +
Range:Rx10K Range:Rx10K
Reading: zero ohms Reading: zero ohms
Open Transistor
8
0 0
8
E BC E BC
- + - +
Reading: infinite Reading: infinite
0 0
8
8
E BC E BC
- + - +
Reading: Infinite Reading: Infinite
0 0
8
8
E BC E BC
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- + - +
8
Range:Rx10K 0
8
Range:Rx10K
Reading: infinite Reading: Infinite E BC
E BC
- + - +
Leak transistor
Reading: approximately Reading: approximately
100Ω 100Ω
0
8
0
8
E BC E BC
- + - +
Reading: approximately 100 Reading: approximately
Ω 100 Ω
0
8
0
8
E BC E BC
- + - +

Range:Rx10K Range:Rx10K 10/13/2014
Reading: approximately Reading: approximately
100 K 100 K
FUSE
a protective device having a short length of wire that melts when the current
passing through it exceeds its rated value.
Condition of fuse
Note: there is no polarity to consider in testing fuse
1. Good fuse (Range: Rx1)
0
8
- +
2. Open fuse (Range:Rx1)
0
8

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- +
Transformer
an electronic/electrical device consisting of two or more coils coupled

together by magnetic induction. Power Transformer - the usual application
is to convert the 220V ac line voltage into higher or lower secondary voltage.
a device that transfers electrical energy from one circuit to another through
inductively coupled conductors—the transformer's coils. A varying current
in the first or primary winding creates a varying magnetic flux in the
transformer's core, and thus a varying magnetic field through the secondary
winding. This varying magnetic field induces a varying electromotive force
(EMF) or "voltage" in the secondary winding. This effect is called mutual
induction.
Condition of power transformer
1. Good transformer- all the terminal coil of the transformer from
primary and secondary have the resistance reading of approximately
3-10 ohms.
2. Open transformer – if the primary or secondary winding has infinite
resistance reading in any of the terminal tested.
3. Shorted transformer – if the primary or secondary winding has zero
resistance reading in any of the terminal tested

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Learning Outcome # 2 Prepare/ Make PCB modules
1. PCB layout is verified for conformity with the schematic diagram in

accordance with the layout rules
2. PCB layout is transferred to copper-cladded board following acceptable
methods and standards.
3. Visual inspection is performed based on standards procedures.
4. Thru-hole is drilled based on standards procedures.
5. PCB is cleaned based on standards procedures.
6. Functionality of PCB is tested and visual inspection is performed based on standards
proceduresReferences/Resources

3.) www.google.com
LEARNING EXPERIENCE / ACTIVITIES
LO2: Prepare/ Make PCB modules

1. Read procedures on the

operation sheets 2.1 of
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Printed Circuit Board  Perform the activity with
Activity Sheets 2.1. the supervision of the
your trainer
2. Do the Operation Sheets 2.1
and 2.2
a. Printed Circuit Board

Lay-outing and
Etching
3. Refer to Assessment Criteria

2.1,
4. If you have missed some of

the questions, go over the
5. If you have any questions or

from your trainer or from
your classmate who have
finished this learning
outcome (LO).
6. If you have finished all the

laboratory activities, you
may proceed to the next
learning outcome (LO).

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Operational Sheet 2.1
Procedure in Making Printed Circuit Board
1. Cut the copper clad or phenolic board to the size of the foil pattern.
2. Clean the copper side of the board with a fine sandpaper.
3. Cover the copper side with musking tape
4. Draw the foil pattern on top of the musking tape.
5. Remove the portions of the tape not covered by the drawing or foil pattern by
a cutting knife
6. Submerge the whole board in the ferric chloride solution placed in a non-
metallic container (plastic, glass, or ceramic) with the copper side up to see if
the copper is completely removed from the uncovered areas of the foil
pattern.
7. To speed up the process keep the solution in motion for about 10 to 15
minutes
8. When the uncovered areas of the PCB are already removed, wash it thorough
with water.
9. Bore holes to the PCB using 1/32” or 3/64” drill bit.
10. Remove the tape from the PCB
11. Wipe the PCB with dry cloth or tissue paper.
12. Clean the copper side of the PCB with sandpaper.
13. Apply a thin layer of plastic varnish to the copper side of the PCB to avoid
corrosive.
14. The PCB is now ready for mounting and soldering components

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TRAINER-CHECK SHEET 2.1
Printed Circuit Board Lay-outing and Eching
Direction: The trainer will prepare an actual laboratory activity regarding

Printed Circuit Board lay-outing techniques.
Prepare/ Make PCB modules

Item PCB lay-outing 50 60 70 80 90 95 100 Score
no.
A Proper use of tool - 50%
B Quality of work - 40%
C Speed – 10%
Grade
--------
Assessment Criteria 2.3
70-100 Competent

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Learning Outcome # 3 Mount and solder electronic components
1. Knowledge of lead and lead-free soldering characteristics and requirements

are applied to mounting and soldering process in accordance with OH&S
standards
2. Components are mounted and soldered in accordance with soldering
principles.
3. Soldering/Desoldering techniques and procedures are applied in accordance
with established standards and requirements.
4. Soldered products are checked and complied with international standards and task
specifications

3.) www.google.com

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LO2: Solder and desolder components to the board

7. Read Information sheet 2.1
8. Read procedures of
Soldering and Desoldering
components to the board.
 Perform the activity with
the supervision of the
9. Do the Operation Sheets 2.1
your trainer
and 2.2
a. Soldering and
Desoldering
components to the
board.
10. Refer to Assessment Criteria

2.1,
11. If you have missed some of

the questions, go over the
12. If you have any questions or

from your trainer or from
your classmate who have

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finished this learning
outcome (LO).

laboratory activities, you
may proceed to the next
learning outcome (LO).
Information Sheet 2.1
SOLDERING
Solder is an alloy of tin and lead used for fusing metals at relatively low
temperatures of about 500 to 600 F. The joint where the two metals are to be fused
is heated, and then solder is applied so that it can melt and cover the connection.
The reason for soldering connections is that it makes a good bond between the
jointed metals, covering the joint completely to prevent oxidation. The coating of
solder provides protection for practically an indefinite period of time
The trick in soldering is to heat the joint, not the solder. When the joint is hot
enough to melt the solder, the solder flows smoothly to fill all the cracks, forming a
shiny cover without any air spaces. Do not move the joint until the solder has set,
which takes only a few seconds.
Either a soldering iron or soldering gun can be used, rated at 25 to 100W. The
gun convenient for intermittent operation, since it heats almost instantaneously when
you press the trigger. The small pencil iron of 25 to 30W is helpful for soldering small
connections where excessive heat can cause damage. This precaution is particularly
important when working with PC boards, where too much heat can soften the plastic
form and loosen the printed wiring.
The three grades of solder generally used for electronic work are 40-60, 50-
50, and 60-40solder. The first figure is the percentage of tin, while the other is the
percentage of lead. The 60-40 cost more, but it melts at the lowest temperature,
flows more freely, takes less time to harden, and generally makes it easier to do
good soldering job.
In addition to the solder, there must be flux to remove any oxide film on the
metals being joined. Otherwise they cannot fuse. The flux enables the molten solder
to wet the metals that the solder can stick. The two types are acid flux and rosin flux.

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Acid flux is more active in cleaning metals, but is corrosive. Rosin flux is always used
for the light soldering work in making wire connections.
Generally, the rosin is in the hollow core of solder intended for electronics
work, so that a separate flux is unnecessary. Such rosin-core solder is the type
generally used. It should be noted though, that the flux is not the substitute for
cleaning the metals to be fused. They must be shinny clean for the solder to stick.
Cross section of a solder wire showing the presence of rosin flux at the center
Dip Soldering
When dip soldering is used, the surface or surfaces of the wiring side of the printed
circuit board are first dipped into a liquid flux. The board is then dipped into molten solder to
a depth that is sufficient to allow solder to flow freely into all connections.
Wave Soldering
In wave soldering (sometimes referred to as fountain soldering), the molten solder is

pumped up to the level of the printed circuit board in the form of waves. This method of
soldering, as compared with dip soldering, permits more favorable angles of solder insertion,
provides better control for the duration of solder contact, and reduces the amount of heat
applied to other parts of the assembly.

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ACTIVITY SHEET 2.1
Solder and Desolder components to the board According to Task
Instruction :
1. Do the following operation sheet:
a. Printed Circuit Board Lay-outing – Operational 2.1
b. Solder and Desolder - Operational Sheet 2.2
2. You must get a score of 70 - 100 to get a grade (Very Good) and pass
Teacher-Check 2-1 based on Assessment criteria 2.1.

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Operational Sheet 2.2
Solder and Desolder According to Task
PROCEDURE IN MAKING GOOD SOLDER CONNECTIONS
1. Clean the tip of the soldering iron by means of soldering paste or wet damp
sponge. (Recommended: 25 to 30W pencil type).
2. The terminals or joints to be soldered must be cleaned and tinned.
3. Heat the soldering iron. Place the soldering iron tip against both the bads and
connections to be soldered. Heat both for 2 to 3 seconds.
4. Apply solder: the joint or connections must be properly intact. Let the heated joint
melt the solder.
5. As solder begins to melts, allow it to flow freely around the connection. The
remove the iron and let the connection cool
6. Check the connection. Poor connections look crystalline and grainy, or the
connections tend to blob. Reheat the connection if it does not look smooth and
bright.
7. Hold the lead with one hand while you cut-off the excess lead length close to the
connection. This will keep you from being hit in the eye by flying lead.

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Illustrations showing the different techniques of good soldering, repairing PCB,
and desoldering electronic components
1. Good soldering techniques.
Apply the solder to the preheated joint and not to the tip of the soldering
iron.
Apply just enough soldering lead to the connection to be soldered.

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2. Shorted printed circuit conductors caused by use of excess solder. We
can remove the excess solder by using the proper techniques of
desoldering.
3. Methods of repairing broken printed conductors on Printed Circuit Boar

(PCB).
4. Good techniques in desoldering components.

a) Avoid direct contact of the tip of desoldering iron with the tip of the
soldering iron.
b) Press the piston towards the body.

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c) Press the piston to suck the soldering lead.

Solder and Desolder According to Task

soldering techniques.
Solder and Desolder techniques

Item Soldering Tool 50 60 70 80 90 95 100 Score
no.
C Speed – 10%
Grade
--------
70-100 Competent

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Module Title: Assembling electronics products
Learning Outcome # 4 Perform electronic products assembly
1. Work instructions is followed based on job order or client requirements

2. Assembly procedures are performed in accordance with OH&S policies and
work instructions
3. Modules and accessories are connected/integrated into the final product
based on the client specifications
4. Excess components and materials are disposed of based on WEEE directives
and 3Rs waste management program

3.) www.google.com

10/13/2014
Information sheet 3.1
Power supplies
A power supply convert the ac input of the 60-Hz power line to dc output voltage.
This V+ supply is needed for the amplifiers in electronic equipment. Transistor require
Dc collector voltage and dc bias for the base.
The main component in the power supply is the rectifier, which generally a silicon
Diode .The diode conducts only when forward polarity of voltage is applied.
Basic function in a Power Supply. Basically, only a rectifier only a rectifier is needed to
change the ac input to dc output. Filter capacitors are also used, however, to remove the
pulsating variations from the dc output, A dc voltage has a polarity, but it can still have
changes in value.
In addition, a power transformer is often used to step up or step down the ac input
voltage to the rectifier. The 220V of the ac power line can be increased or decreased
according to the turn ratio of the transformer.
Those basic functions are illustrated by block diagram in Fig. 1-1. The supply is shown
with positive dc output for V+. For negative dc output, the rectifier can be reversed, but V+ is
more common. Positive is needed for collector voltage on NPN transistors.
Advantages of 120V 60Hz AC Power
With an arms value of 120V, the ac power is equivalent to 120V dc power in heating
effect. With a higher value than 120V there would be more danger of a fatal electric shock.
Lower voltages would be less efficient in supplying power.
A higher voltage has the advantage of less power loss, since the same power can be
produced with less current. The power increases as the square of the current. For industrial

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applications were large amounts of power are used, the main is often 208V, three phase. The
three phase ac is more efficient for the operation of large motors.
The advantage of ac over dc power is greater efficiency in distribution from the
generating station. Ac voltages can easily be stepped up by means of transformer with very
little loss, but a transformer cannot operate on direct current.
The frequency of 60-Hz is convenient for commercial ac power. Much lower
frequencies would require transformers that could be too big.
Fig. 1.1 Basic function of a power supply from AC input to DC output
Also, too low a frequency for alternating current in a lamp could cause lamp to flicker.
Too high frequency results in excessive iron core losses from eddy currents and hysteretic in
the transformer. It should be noted that frequency of the ac power mains in most European
countries is 50-H
Types of Rectifier Circuits. Three popular types of rectifier circuit are shown in Fig.
1 – 2. They are:
1. Half – wave rectifier. Only one diode is needed to conduct on one alternation of every
cycle of the ac input.
2. Full – wave rectifier. The transformer has a center tap for the ac input. Two diodes are
used to conduct the opposite half – cycles. Each diode supplies one – half the dc load
current.
3. Full – wave bridge. This circuit uses four diodes in two pairs. The bridges circuit
makes it possible to eliminate the center tap.
Half-wave rectifier Full-wave rectifier Full-wave bridge
TYPES OF RECTIFIER FILTER

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Shunt – Capacitance Filter. A capacitor connected in parallel with the load, as in Fig. 1 – 3,
acts as a filter and is called a shunt – capacitance filter.
Fig. 1.3 Half-wave rectifier with shunt-capacitance filter
The capacitor charges during the time that the diode conducts and discharges through
the load when the diode is not conducting.
The effectiveness of the shunt – capacitance filter depends on the values of:
1. Filter capacitors C
2. Load RL
3. Frequency of the rectified output.
The larger the value of C, the lower the time constant, and the better is the filtering
action. The higher the load resistance RL (low current consumption), a considerable value
of filter capacitor is enough. A full – wave rectifier with a ripple frequency of only 120
Hz is easier to filter than that of the half – wave rectifier with a ripple frequency of only
60 Hz.
Pi Filter. The most effective filter is the pi filter of Fig. 1 – 4 Capacitor C1 provides
initial filtering. The ac ripple is then further filtered by inductor (choke) L and capacitor
C2. Inductor L provides a high impedance compared with the impedance of C2; hence,
most of the ripple voltage is dropped across, and the output is virtually free of ac.
Fig. 1-4 Full-wave rectifier and Pi filter
RC Filter. The RC filter illustrated in Fig. 1 – 5 is a modification of the pi filter.

Inductor L has been replaced by resistor R. The function of resistor R is to oppose the
flow of ac. The dc output voltage suffers because of an appreciable voltage drop across R.

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The RC filter cannot be used with heavy loading because RL must be much greater
than R. Otherwise, the dc output is reduced significantly.
Fig. 1.5 Full-wave rectifier and RC filter
L – Section Filter. The filter circuit known as the L – Section filter is illustrated in
Fig. 1 – 6. It overcome the problems of high – peak current in the diode associated with a
shunt – value of L is properly selected for an L – Section (choke – input).
Fig. 1-6. Full-wave rectifier and L-section (choke-input) filter
The L – Section is frequently used with high load – current circuits. It is, however, not
convenient to use with a half – wave rectifier
POWER SUPPLY OR ADAPTOR
A power supply, sometimes called an adaptor or adapter is a circuit compose of three major
components; the power transformer, rectifiers (diodes), and filter capacitors. This device is
use to change the AC input voltage of 220 – volt AC from MERALCO power line voltage to
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different output dc voltages (3V, 4.5V, 6V, 9V, and 12V). Because of the high cost of the
batteries, this device is use to substitute battery – operated radio receivers, toys, and other
apparatus operated from 3V to 12V dc supply voltage. Adaptors can also be used in charging
chargeable alkaline batteries and in testing electrical and electronic circuits requiring low
voltage dc supply.
Function of Adaptor Components
1. AC PLUG – Connects the adaptor to 220 – volt power line

2. TRANSFORMER – Steps down the AC voltage from 220V to 3VAC to 12VAC.
3. FUSE (optional for low current supply) – Protects the circuit from shorts and/or
overloads.
4. SELECTOR SWITCH- Selects different DC output voltage manually.
5. RECTIFIER DIODES – Change AC voltage to pulsating DC voltage.
6. FILTER CAPACITORS – Remover the rifle from the pulsating DC voltage to have
pure DC output voltage.
7. PILOT BULB – Indicates current flow in the circuit.
8. BLEEDER RESISTOR – Discharges the filter capacitors to have different output
voltages especially when shifting lower voltage output from higher voltage when the
adaptor output is not connected to any load. It also slightly regulating the DC output
voltage

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ACTIVITY SHEET 3.1
Assemble power supply board
Instruction :
1. Provided the schematic diagram and parts of regulated power supply,
assemble and disassemble the power supply circuit.
2. You must get a score of 70 - 100 to get a grade (Very Good) and pass
Teacher-Check 3-1 based on Assessment criteria 3.1.

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Schematic Diagram of 12V
T1and 5 V output regulated power supply circuit
12 V
LM7812
IC-1 12 V
LM7805 C2
+
IC-2 5V
C1 C3
0V
__
List of materials
1.) Power Transformer (T1) = 0V-12V output

2.) AC power chord line
3.) Rectifier Diode (D1-D4) = 1 Ampere
4.) Electrolytic Capacitor (C1) = 2,200uf/16V
5.) Ceramic Capacitor (C1 & C3) = 104 pf
6.) IC regulator (IC1 & IC2) = LM7812 and LM7805

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7.) Printed Circuit Board = 2”x3”
8.) Hock up wire # 22 = Black 1 meter, Red= 1 meter
9.) Ferric Chloride = 1 botttle

10/13/2014

Assemble and disassemble power supply board

Item Power Supply Circuit 50 60 70 80 90 95 100 Score
no.
C Speed – 10%
Grade
--------
70-100 Competent

10/13/2014
Qualification: Consumer Electronics Servicing NC II
Module Title: Assembling electronics products
Learning Outcome # 5 Test and inspect assembled electronic

products
1. Finished products are subjected to final inspection and testing in

accordance with quality standards, procedure and requirements.
2. Mechanical and electrical/electronic testing is performed in accordance with
quality standards, procedures and requirements
3. Work completion is documented and responsible person is informed in
accordance with established procedures.
4. Housekeeping procedures are observed in accordance with 5S discipline
and established procedures.

3.) www.google.com

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Learning Outcome 5: Test and inspect assembled electronic products

1. Test the DC voltage out of the
finished product of
assembled power supply by
using muti-tester.
 Perform the activity with the
2. Refer to schematic diagram observation of the teacher
when testing the voltage out

laboratory activities, you may
proceed to the next module.

10/13/2014
10/13/2014
+ __ + __
T1
12 V
LM7812
IC-1 12 V
LM7805 C2
+
IC-2 5V
0V C1 C3
__

10/13/2014
ASSESSMENT PLAN
Evidence Checklist
Competency standard: Consumer Electronic Servicing NC II
Unit of competency: Assemble and Disassemble Consumer Electronic

Products and Systems.
Title of Module Assembling and Disassembling Consumer

Electronic Products and Systems.
Ways in which evidence will be collected:
Third party Report
Demonstration
[tick the column]
Questioning
Observation
Portfolio
Written
The evidence must show that the candidate …
 Electronic components are identified in
according to their symbol. * X X
 Electronic components are specified
according to their function and uses * X X
 Parts and Materials needed are prepared and
obtained according to requirements * X
 Printed Circuit Board lay-outing are
performed in accordance with job
requirements
X
 Solder and desolder components in
accordance with standard and procedure * X X X
 Safety procedures in soldering and
desoldering components are practiced. X
 Assembling and disassembling circuit board
are performed in accordance with OH&S
policies and procedures. *
X X
 Assembled circuit board products are
checked in accordance with quality
standards.
X X
 Finished products are test and inspect in
accordance with quality standards,
procedures and requirements. *
X X X
NOTE: *Critical aspects of competency

Code Assemble Developed by: Date Date Page
No. Electronic Developed Revised: No.
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Prepared Date:
by:
Checked Date:
by:
Observation Checklist
Candidate’s name:
Assessor’s name:
Assessment
Center:
Competency
standards:
Unit of
competency:
Instructions for the assessor:

1. Observe the candidate Using hand tools
2. Describe the assessment activity and the date on which it was undertaken.
3. Place a tick in the box to show that the candidate completed each aspect of the
activity to the standard expected in the enterprise.
4. Complete the feedback sections of the form.
Date of observation
Description of assessment
activity
Location of assessment
activity
The candidate…. If yes, tick the box

 Can identify electronic components according to their
symbols.
 Can specify electronic components according to their
Function and uses.
 Can prepare and obtain parts and materials needed
according to requirements.
 Can solder and desolder components in accordance
Products :
ZUKARNIN A.
BASILAN
with the standard and procedures.
 Can practice safety procedures in soldering and
desoldering components.
 Can checked assembled circuit board products in
accordance with quality standards.
 Can test and inspect finished products in accordance
with quality standards, procedures and requirements
Did the candidate’s overall performance meet the Yes No
standard?
Feedback to candidate:
Assessor signature: Date:
Observation and Questioning Checklist
Candidate’s name:
Assessor’s name:
Assessment Center
Competency
standards
Unit of
competency:
Instructions for the assessor:

1. Observe the candidate in assembling a power supply circuit board.
2. Describe the assessment activity and the date on which it was undertaken.
3. Place a tick in the box to show that the candidate completed each aspect of the
activity to the standard expected in the enterprise.
4. Ask the candidate a selection of the questions from the attached list to confirm
his/her underpinning knowledge
5. Place a tick in the box to show that the candidate answered the questions
correctly.
6. Complete the feedback sections of the form.
Date of observation
Description of assessment
activity

Products :
ZUKARNIN A.
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Location of assessment
activity
The candidate…. If yes, tick the box

 Can solder and desolder components in accordance
with the standard procedure..
 Can perform in assembling circuit board according to
OH&S policies and procedures.
 Can test and inspect circuit board finished products in
accordance with quality standards, procedures and
requirements.
Did the candidate’s overall performance meet the Yes No
standard?
Demonstration
Candidate’s name:
Assessor’s name:
Unit of competency:
Competency standards:
Date of assessment:
Time of assessment:
Instructions for demonstration
Given the necessary materials and tools the trainee/student must be able to:
Solder and desolder component, assemble and disassemble circuit board and
test and inspect finished product to given task or application.
Materials and equipment:
hand tools
 Utility knife
 Long nose pliers
 Side cutter
 Soldering iron and desoldering pump
 Mini-Drill
 Multi-tester

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Materials
 Printed Circuit Board
 IC regulated (LM7812,LM7805)
 Ball hammer
 Wrenches
 Wire stripper
P to show if evidence is
demonstrated
During the demonstration of skills, did the
Yes No N/A
candidate:
 Can choose tools in accordance with
manufacturer’s manual. o o o
 Can practice safety procedures in using
hand tools o o o
o o o
o o o
The candidate’s demonstration was:
Satisfactory q Not Satisfactory q

Products :
ZUKARNIN A.
BASILAN
PERFORMANCE TEST
Learner's Name Date
Competency: Test Attempt

1st 2nd 3rd
Directions: OVERALL EVALUATION

Level
Achieved
CALL TRAINER, ask PERFORMANCE LEVELS
trainer to assess your
performance in the 4 - Can perform this skill without
following critical task supervision and with initiative and
and performance criteria adaptability to problem situations.
below 3 - Can perform this skill satisfactorily
without assistance or supervision.
You will be rated based
on the overall evaluation 2 - Can perform this skill satisfactorily
on the right side. but requires some assistance and/or
supervision.
1 - Can perform parts of this skill
satisfactorily, but requires considerable
assistance and/or supervision.
The teacher will initial the level achieved.
PERFORMANCE STANDARDS
For acceptable achievement, all items should receive a Yes No N/A
"Yes" or "N/A" response.
Get from Performance criteria of the module (TR)

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ZUKARNIN A.
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Products :
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Republic of the Philippines

TECHNICAL EDUCATION AND SKILLS DEVELOPMENT AUTHORITY

Code No. Unit of Competency Developed by: Date Date Page

You are required to go through a series of learning activities in order to

Recognition of Prior Learning (RPL)

Code No. Unit of Competency Developed by: Date Date Page

Code No. Unit of Competency Developed by: Date Date Page

Module Title: Assembling Electronic Products

This module contains information and suggested learning activities on

This module consists of three (5) learning outcomes. Each learning

Upon completing this module, report to your instructor for

1. Prepare to assemble electronic products.

13.Knowledge of lead and lead-free soldering characteristics and requirements are

Code No. Unit of Competency Developed by: Date Date Page

 Active State - It is a condition of a semiconductor device that is

 Alternating Current - It is an electric current that is continually

 Anode - It is a positive electrode of semiconductor device.

 Biasing Current - It is a current supply needed by the semiconductor

 Capacitance - It is a property that exits whenever two conductors are

 Capacitor - A component designed intentionally to have a definite

 Cathode - It is a negative electrode of semi-conductor devices.

 Circuit - An arrangement of one or more complete paths of electron

 Conductor - A wire, cable, or other body or medium that is suitable

 Couple - To connect two circuits so signals are transferred from one

 Current - It is the rate of transfer of electricity from one point to

 Cut-off State - It is a condition of a semiconductor device that is not

 DC Milli-Ammeter - It is an instrument that measures the amount of

 Desoldering - It is a process of unsoldering unwanted parts or

 Dielectric Material - A material that serves as insulator because it

 Direct Current - It is an electric current that flows in one direction.

Code No. Unit of Competency Developed by: Date Date Page

 Junction – It is a hybrid of an electronic circuit enclose in single

 Ohmmeter - It is an instrument that measures the amount of

 PCB - It is a Printed Circuit Board or (PCB) which is actually printed

 P-type - Positive type

 Quiescent Point - It is the least amount of operating current of semi-

 Resistance - It is the opposition that a component or material offers

 Resistor - A component designed intentionally to have a definite

 Soldering - It is a process of joining two metals caused by heat

 Soldering Technique - It is a right process in which the solder (lead)

 Splicing - It is defined as a joint that connect two lengths of

 Voltage - It is the electrical pressure that existed between two points

 Voltmeter - It is an instrument that measures the amount of

Code No. Unit of Competency Developed by: Date Date Page

1. Assembly workplace is prepared in accordance with OH&S policies and

1.) Marconi S. Pagarigan, Sharif A. Bandi; Practical Electronics

Code No. Unit of Competency Developed by: Date Date Page

Learning Outcome 1: Choose functional hand tools

Learning Activities Special Instruction

1. Read Information Sheet 1.1.1

Code No. Unit of Competency Developed by: Date Date Page

Electronic Symbols and Actual Components

Symbol Actual Component

¼ to 2 watts 5 watts to 20 watts

Symbol Actual Component

B. Capacitors- formerly known as condenser)is a passive electronic

Code No. Unit of Competency Developed by: Date Date Page

Symbol Actual Component