COMPETENCY BASED LEARNING MATERIAL
Sector:
CONSUMER ELECTRONICS
Qualification:
ELECTRONICS PRODUCTS ASSEMBLY AND SERVICING NC II
Unit of Competency:
SERVICE ELECTRONIC PRODUCTS AND SYSTEMS
Module Title:
SERVICING ELECTRONIC PRODUCTS AND SYSTEMS
TECHNICAL EDUCATION SKILLS AND DEVELOPMENT AUTHORITY
QUEZON NATIONAL AGRICULTURAL SCHOOL
Malicboy,Pagbilao, Quezon
Table of Content
How to Use this Module .................................................................................... i
Introduction ..................................................................................................... ii
Technical Terms ...............................................................................................iii
Learning Outcome 1:
Identify the Functions of the Parts of a Microwave Oven ................................... 1

Information Sheet 1.1 ............................................................................. 3

Student-Check 1.1.................................................................................. 6

Student-Check Key 1.1 ........................................................................... 8
Learning Outcome 2:
Diagnose a microwave oven and troubleshoot defects found ............................. 9

Information Sheet 2.1 ........................................................................... 11

Operation Sheet 2.1............................................................................ 13

Job Sheet ............................................................................................. 15
Learning Outcome 2:
Maintain and repair a microwave oven ........................................................... 16

Information Sheet 3.1 ........................................................................... 18

Operation Sheet 3.1 .............................................................................. 20

Operation Sheet 3.2 .............................................................................. 23

Job Sheet ............................................................................................. 26
Assessment Plan ............................................................................................ 27
Performance Test ........................................................................................... 37
HOW TO USE THIS MODULE
Welcome to the Module “Servicing Electronic Products And Systems”. This
module contains training materials and activities for you to complete.
The unit of competency “Service Electronic Products and Systems” contains
the knowledge, skills and attitudes required for Electronic Products Assembly
and Servicing required to obtain the National Certificate (NC) level II.
You are required to go through a series of learning activities in order to
complete each of the learning outcomes of the module. In each learning outcome
there are Information Sheets, Job Sheets, and Operation Sheets. Do these
activities on your own and answer the Self-Check at the end of each learning
activity.
If you have questions, don’t hesitate to ask your teacher for assistance.
Recognition of Prior Learning (RPL)
You have already some basic knowledge and skills covered in this module
because you have been working for some time; and already completed training
in this area.
If you can demonstrate competence to your teacher in a particular skill, talk
to your teacher so you don’t have to undergo the same training again. If you
have a qualification or Certificate of Competency from previous trainings show it
to him/her. If the skills you acquired are consistent with and relevant to this
module, they become part of the evidence. You can present these for RPL. If you
are not sure about your competence skills, discuss this with your teacher.
After completing this module, ask your teacher to assess your competence.
Result of your assessment will be recorded in your competency profile. All the
learning activities are designed for you to complete at your own pace.
In this module, you will find the activities for you to complete and relevant
information sheets for each learning outcome. Each learning outcome may have
more than one learning activity.
This module is prepared to help you achieve the required competency, in
receiving and relaying information. This will be the source of information that
will enable you to acquire the knowledge and skills in “Maintain and Repair
Electronically-Controlled Domestic Appliances” independently at your own pace
with minimum supervision from your teacher.
Program/Course:
CONSUMER ELECTRONIC SERVICING NC II
Unit of Competency:
MAINTAIN AND REPAIR ELECTRONICALLYCONTROLLED DOMESTIC APPLIANCES
Module Title:
MAINTAINING AND REPAIRING A MICROWAVE
OVEN
INTRODUCTION:
This module contains information and suggested learning activities on
Maintaining and Repairing a Microwave Oven. It covers the knowledge, skills
and attitudes required to maintain and repair this home appliance.
Completion of this module will help you better understand the succeeding
module on maintaining and repairing electronically-controlled domestic
appliances.
This module consists of three (3) learning outcomes. Each learning outcome
contains learning activities supported by instructional sheets. Before you
perform the instructions, read the information sheets and answer the self-check
and activities provided to ascertain to yourself and your teacher that you have
acquired the knowledge necessary to perform the skill portion of the particular
learning outcome.
Upon completing this module, report to your teacher 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.
SUMMARY OF LEARNING OUTCOMES:
Upon completion of the module the students should be able to:
LO1 Identify the functions of the parts of a microwave oven.
LO2 Diagnose a microwave oven and troubleshoot defects found
LO3
Maintain and repair a microwave oven.
ASSESSMENT CRITERIA:
Refer to assessment criteria of learning outcomes 1-3 of this module.
PREREQUISITES:
 Using Hand Tools
 Preparing and Interpreting Technical Drawing Used in Electronics
 Connecting and Terminating Electronics Circuit
 Applying Quality Standards
TECHNICAL TERMS
Cathode
AC Voltage
Alternating
Current
Anode
Bridge
Rectifier
Calibration
Capacitor
AC/DC
Color Code
DC Power
Supply
Diode
Electrolytic
Cap.
Full Wave
Rectifier
Fuse
Half Wave
Rectifier
Leakage
Light Emitting
Diode
Output
Power Supply
Primary
Printed Circuit
Board
Rectification
Rectifier
Regulated
- The negative terminal electrode of a device. The “N” terminal
in a junction diode.
- A voltage in which the polarity alternates.
- An electric current that rises to a maximum in one
direction, falls back to zero and then rises to a maximum in
the opposite direction and then repeats.
- The positive electrode or terminal of a device. The “P”
material of a diode.
- A circuit using four diodes to provide full wave rectification.
Converts AC voltage to a pulsating DC voltage.
- To adjust the correct value of a reading by comparison to a
standard.
- An electronic component having capacitive reactance.
- Equipment that will operate on either an AC or DC power
source.
- Set of colors used to indicate value of a component.
- Any source of DC power for electrical equipment.
- A two terminal device that conducts in only one direction.
- It is used to filter the current flowing in the circuit.
- The rectifier that makes use of the full ac wave in both
positive and negative half cycles.
- A protective device in the current path that melts or breaks
when current exceeds a predetermined maximum value.
- A diode rectifier that converts AC to pulsating DC by
eliminating either the negative or positive alternation of
each input AC cycle.
- Small undesirable flow of current through an insulator or
dielectric.
- A semiconductor diode that converts electric energy into
electromagnetic radiation at a visible and near infrared
frequencies when its pn junction is forward bias.
- Terminal at which a component, circuit or piece of
equipment delivers current, voltage or power.
- Electrical equipment used to deliver either AC or DC
voltage.
- First winding of a transformer. Winding that is connected to
the source as opposed to secondary which is a winding
connected to a load.
- Insulating board containing conductive tracks for circuit
connections.
- Process that converts alternating current to direct current.
- Diode circuit that converts AC to pulsating DC.
- Power supply that maintains a constant output voltage
Power Supply
Resistor
Rotary Switch
Schematic
Diagram
Secondary
Short Circuit
Solder
Soldering
Soldering Iron
Substrate
Switch
Test
Transformer
Troubleshootin
g
Volt-OhmMeter
under changing load condition.
- Component made of material that opposes the flow of
current and therefore has some value of resistance.
- Electromechanical device that has a rotating shaft
connected to one terminal capable of making, breaking a
connection to one or more other terminals.
- Illustration of an electrical or electronic circuit with the
components represented by their symbol.
- Output winding of a transformer. Winding that is connected
to a load.
- Also called a short. Low resistance connection between two
points in a circuit typically causing excessive current.
- Metallic alloy used to join two metal surfaces.
- Process of joining two metallic surfaces to make an
electrical contact by melting solder (tin and lead) across
them.
- Tool with an internal heating element used to heat surfaces
being soldered to the point where the solder becomes
molten.
- Mechanical insulating support upon which a device is
fabricated.
- Electrical device having two states, ON (closed) or OFF
(open).
- Sequence of operations intended to verify the correct
operation or malfunctioning of a piece of equipment or
system.
- Inductor with two or more windings.
- Systematic approach to locate the cause of a fault in an
electronic circuit or system.
- Known as a multitester. A test equipment used to check AC,
DC voltages, current in a circuit and resistance of any
components out of the circuit.
Program/Course:
CONSUMER ELECTRONIC SERVICING NC II
Unit of Competency:
MAINTAIN AND REPAIR ELECTRONICALLY
CONTROLLED DOMESTIC APPLIANCES
Module Title:
MAINTAINING AND REPAIRING A MICROWAVE
OVEN
Learning Outcome 1: Identify the functions of the parts of a microwave
oven.
Assessment Criteria
1.
Operation of microwave oven.
2.
Parts of a microwave oven.
3.
Functions of its parts.
LEARNING EXPERIENCES/ACTIVITIES
Learning Activities
Special Instructions
1. Read the attached Information
Sheet 1.1 on microwave oven.
2. Answer Self Check 1.1
3. Compare your answer to the
model answer. Self Check 1.1
4. If you missed some of the
questions, go back again to
Information Sheet 1.1.
5. If you have answered the
questions, you are ready to
proceed to learning outcome 2.

Try to answer the Self-Check 1.1
without looking at the
Information Sheet.
INFORMATION SHEET 1.1
Operation of Microwave Oven
Microwave oven
Is a kitchen appliance that can come in many different sizes and styles
employing microwave radiation primarily to cook or heat food.This is
accomplished by using microwaves, almost always emitted from a
magnetron, to excite water (primarily) and other polarized molecules within
the food to be heated.
How the microwave operates?
Microwave ovens are generally used for time efficiency in both industrial
applications such as restaurants and at home, rather than for cooking quality,
although some modern recipes using microwave ovens rival recipes using
traditional ovens and stoves, they have a central heated anode, which is the
source of electrons, several identical tuned cavities, a very strong magnet and a
small antenna to extract the energy. They are usually made from metal, but
operate on the same principles that glass thermionic valves do.
Major Parts and its Functions
High voltage Capacitor
A major concern in the operation of high voltage
capacitors is the failure mode at end of life. While
progress has been made in this area at lower voltages,
little has changed for high current capacitors operating
above 30 kV in steady state and pulsed power
applications.
Magnetron
The magnetron is a device for producing microwave
radiation from electricity. A variation on this device, called
the cavity magnetron is usually used as the microwave
energy source in your microwave oven. It can also be used
as the microwave source in a pulsed radar.
High voltage transformer
is the "muscle" of the microwave oven. With an input of 120
VAC (or 240 VAC in many commercial models) applied to the
primary winding, the high-voltage transformer (also referred
to as power or plate transformer) steps up that primary
voltage to a very high voltage. This high voltage is then
boosted even higher by the voltage-doubling action of the
capacitor and diode
Varistor
is a type of resistor with a significantly non-ohmic currentvoltage characteristic. The name is a portmanteau of
variable resistor*, which is misleading since it is not
continuously user-variable like a potentiometer or rheostat,
and is not a resistor but in fact a capacitor. Varistors are
often used to protect circuits against excessive voltage by
acting.
Fuse
A wire, bar, or strip of fusible metal inserted for safety in an
electric circuit. When the current increases beyond a certain
safe strength, the metal melts, interrupting the circuit and
thereby preventing possibility of damage.
High voltage diode
A high voltage diode has a lamellar structured body of
semiconductor material. The lamellar structure is produced
by the thermal gradient zone melting process method of
migrating metal "wires" through the body to form a plurality
of spaced regions of conductivity opposite to that of the
body. The material of the spaced
Latch switch
A switch having a bimetal latch for locking a resilient contact
in a closed circuit position, and a heating coil for activation of
the latch to release the contact.
Oven lamp
A lamp which indicates that the unit has power.
SELF-CHECK 1.1
Complete the table below:
Note: Write your answer on another sheet of paper.
Part name
Description
has a lamellar
1.__________________
structured body of
semiconductor
material.
is the "muscle" of the
2.__________________
microwave oven.
is a device for
producing microwave
3.__________________
radiation from
electricity.
A major concern in the
4.__________________
operation of high
voltage capacitors is
the failure mode at end
of life.
Picture
A wire, bar, or strip of
5.__________________
fusible metal inserted
for safety in an electric
circuit.
Is a type of resistor with
6._________________
a significantly nonohmic current-voltage
characteristic.
A switch having a
7._________________
bimetal latch for
locking a resilient
contact in a closed
circuit position,
8-10. Given an actual microwave oven, identify its parts. Ask your teacher to
provide you with a microwave. (at least 3 major parts)
Note: Write your answer on a separate sheet of paper. Do not write anything on
the module
SELF CHECK KEY 1.1
1.) high voltage diode
2.) high voltage transformer
3.) magnetron
4.) high voltage capacitor
5.) fuse
6.) varistor
7.) latch switch
8-10) any of the following:
High voltage transformer
High voltage diode
High voltage capacitor
Magnetron
Fuse
Varistor
Latch switch
Oven lamp
Program/Course:
CONSUMER ELECTRONIC SERVICING NC II
Unit of Competency:
MAINTAIN AND REPAIR ELECTRONICALLY
CONTROLLED DOMESTIC APPLIANCES
Module Title:
MAINTAINING AND REPAIRING A MICROWAVE
OVEN
Learning Outcome 2: Diagnose a microwave oven and troubleshoot the
defect found.
Assessment Criteria
1.
2.
3.
4.
5.
Pre-testing procedure is performing in accordance with manufacturer’s
instruction.
System defects/fault symptoms are identified using appropriate tools
and equipment.
Identified defects and faults are explained to the responsible person.
Results of diagnosis and testing are documented.
Troubleshooting is performed in accordance with the service manual.
LEARNING EXPERIENCES/ACTIVITIES
Learning Activities

Read information Sheet #3B-21 on microwave oven.

Read Operation sheet#8-B-2-1.

Perform the Job Sheet# 8-B-21.

Read Operation sheet#8-B-2-2

Answer assessment plan

If you have answered the
questions perfectly by YES, you
are ready to precede to learning
outcome #3.
Special Instructions

Try to answer the Self-Check
materials without looking at the
information sheet.
INFORMATION SHEET 2.1
Faults and Trouble of a Microwave oven
Trouble
No power
Cause
Inspection
Remedy

Overload
Using


High voltage
multitasked
component
transformer is
check continuity
testing
continuously
of the ff. parts
operated for
a.) fuse
defective parts,
more than 3 hrs.
b.) diode
Refer next
c.) high voltage
Learning
capacitor
outcome

Refer to
Replace
repairing
procedure
Doesn’t light

Oven lamp is
Check oven lamp

continuously
Replaced busted
oven lamp
operated for
more than 3hrs.
W/power no

display

Foreign
Visual check
materials short
Using multitester
programmer
to the circuit
check continuity
circuit assy.
Replaced digital
board
W/power
doesn’t heat


Defective
Using multitester
magnetron
check continuity
component
of magnetron
testing
Refer
procedure

Explain to
customer the
microwave
magnetron is
unfunctional
Tools Used in pre-testing a microwave oven

VOM (multitester)

Instructional/Operational Manual

Screw Driver

Pliers

Side cutting pliers

Long nose pliers
Pre-testing procedure of a microwave oven
If……….

Unit cannot be
Possible cause

turn on
is Ac power cord
How to fix

property plug in?
Visual check ac
power cord if
there is loose in
the power plug

Unit does not

operate when turn
on
Is the plug connected

Plug-in properly

Push front
properly?

Is the front cover
properly close
cover/ front lid
properly
OPERATION SHEET 2.1
Troubleshooting Procedure of a Microwave Oven
Procedure:
Unlike many other appliances, the microwave oven is high voltage, highcurrent equipment. Though it is free from danger in ordinary use, extreme care
should be taken during repair.
Caution
1.) Serviceman should remove their watches whenever working close to or
replacing the magnetron.
Checking the earthing
2.) Do not operate on a 2 wire extension cord. The microwave oven is design to
be used in a completely earthed condition. It is imperative, therefore, to make
sure it is properly earthed before beginning repair work.
If the door lock, the door switch, the door seal or the door develops a
malfunction, be sure not to operate the oven until complete repairs are
made
3.) If the oven is operated with any of these parts in imperfect condition,
hazardous microwave leakage might occur.
WARNING
Never operate the oven until the following are confirmed:
 The door is tightly closed.
 There is no broken hinge or door arm.
 The door seal is not damaged.
 The door is not bent or warped.
 There is no other visible damage.
Warning about the electric charge in the high voltage capacitor
For about 30 seconds after the oven is turn-off, an electric charge remains in
the high voltage capacitor. When replacing or checking parts, remove the power
plug from the outlet and the short terminal of the high voltage capacitor(
terminal of lead wire from diode ) to chassis ground with an insulated handle
screwdriver to discharge.
WARNING
4.) There is high-voltage present, with high current capabilities in the circuits of
the high voltage winding and filament winding of the high voltage transformer. It
is extremely dangerous to work on or near these circuits with oven energized.
DO NOT measure the voltage in the high voltage circuit including filament
voltage in the high voltage circuit including filament voltage of magnetron.
WARNING
5.) Never touch any circuit wiring with your hand nor with an insulated tool
during operation

When parts must be replaced, remove the power plug from the outlet.

When the 10amp/2.5amp fuse is blown due to the operation of short
switch
WARNING
5.) When the 10 amp/2.5 amp fuse is blown due to operation of the interlock
monitor switch, door switch, short switch and power relay B (RY1)


When replacing the fuse, confirm that it has the appropriate rating
for these models.
When replacing faulty switches, be sure mounting tabs are not bent.
6.) Avoid inserting nails, wire, etc. through any holes in the unit during
operation, because such objects may work as an antenna and cause microwave
leakage
Confirm After repair
7.) Make sure that all electrical connections are tight before inserting the plug
into the wall outlet and check any energy leakage of a microwave. Use caution
not to become exposed to radiation from the microwave magnetron or other
parts conducting microwave energy.
JOB SHEET 2.1
Result of Diagnosis and Testing
Fill-out the following table:
Brand: ___________________
Model #:__________________
Serial#:___________________
Trouble
Possible
Possible affected
Possible
cause of
components/parts
remedy
trouble
1._______________
2._______________
3._______________
4._______________
5._______________
Program/Course:
CONSUMER ELECTRONIC SERVICING NC II
Unit of Competency:
MAINTAIN AND REPAIR ELECTRONICALLY
CONTROLLED DOMESTIC APPLIANCES
Module Title:
MAINTAINING AND REPAIRING A MICROWAVE
OVEN
LEARNING EXPERIENCES/ACTIVITIES
Learning Activities
Special Instructions
1. Read the Operation Sheet3.1
on food blender.
2. Read information Sheet 3.1
3. Read Operation Sheet 3.2
4. Perform the Job Sheet 3.1
5. Answer
assessment
plan,
missed some of the question,
go back again.
6. If you have answered the
assessment plan with perfectly
yes, you are ready to proceed
to the next module.

Try to answer all the Self
Check 3.1 without looking
at the Information sheet.
INFORMATION SHEET 1.1
SPECIFICATION OF REPLACEMENT PARTS
OPERATION SHEET 3.1
COMPONENT CHECKING AND REPLACEMENT
1.)PRIMARY LATCH SWITCH, (DOOR SWITCH AND POWER RELAY B
INTERLOCKS.
 Unplug lead connectors to primary latch switch and door switch
 Test the continuity of the circuit of door opened and closed position
Normal continuity readings should be as follows
Door open
Door closed
Primary latch switch
∞ Ω (open)
0 Ω (close)
Door switch
∞ Ω (open)
0 Ω (close)
Power relay b
∞ Ω (open)
∞ Ω (open)
2.) SHORT SWITCH AND MONITOR
 Test continuity of switches at door opened and closed positions
using
the lowest scale of the ohmmeter.
Normal continuity readings should be as follows
Door opened
Door closed
0Ω
0Ω
3.)HIGH VOLTAGE TRANSFORMER
Normal resistance readings should be as follows:
Secondary winding
Approx. 60 Ω-120 Ω
Filament winding
Approx. 0 Ω
Primary winding
Approx. 0 Ω - 2 Ω



4.) HIGH VOLTAGE CAPACITOR
Normal capacitor will show continuity for a short time, and then indicate
9MΩ once the capacitor is charged.
5.) MAGNETRON
A continuity check across magnetron filament terminals should indicate
one ohm or less.
A continuity check between each filament terminal and magnetron case
should read open.


6.) DIODE
Disconnect the two leads connected to the diode terminal and a normal
diode’s resistance will be infinite in one direction and several hundreds
kΩ in the other direction.
7.) PROTECTOR DIODE
A normal protector diode’s resistance will be infinite in both directions. If
it is faulty it shows continuity in one or both directions.
OPERATION SHEET 3.2
Maintain and repair a microwave oven
MAGNETRON
After replacement of the magnetron
Tighten mounting screws properly making
Making sure there is no gap between
the waveguide and the magnetron to prevent microwave leakage.
DIGITAL PROGRAMMER CIRCUIT (D.P.C) AND MEMBRANE KEYBOARD
 The membrane key board is attached to the escutcheon base with double
faced adhesive tape. Therefore applying hot air such as using a hair dryer
is recommended for smoother removal.
 When installing new membrane keyboard, make sure that the surface of
escutcheon base is cleaned sufficiently so that any problemscan be
avoided.
 Alignment position of membrane key board; membrane keyboard; right
and upper edges Escutcheon sheet: right and upper edges.
LOW VOLTAGE TRANSFORMER
 Be sure to ground any static electric
charge built up on your body before
handling the D.P.C.
 Do not use soldering iron or disoldering
tool of more the than 30watts on D.P.C
contacts.
TEMPERATURE SENSOR (thermal protector)
 Remove 1 screw holding the temperature
sensor and replace with new one.
 Solder the lead wires securely
to the sensor terminals.
FAN MOTOR
 Remove 5 screws holding fan motor shaft by pulling it straight out.
 Separate the fan motor from the orifice.
DOOR ASSEMBLY
 After replacement of defective component parts of the door, be sure that
the door assy. is properly mounted, microwave power may leak from the
clearance between the door and oven if the door assembly is not mounted
properly.
STIPPER MOTOR
 Removing and reinstalling the motor
cover
Use 4x6 screw
FLOR
SHELF
AND/OR
MOVING
ANTENNA
 When replacing the moving antenna .
make sure
the plastic stipper spacers are
correctly in place
they are necessary to stabilized the
antenna by
gliding around the oven bottom as
the antenna
turns.
JOB SHEET 3.1
Repairing a Microwave Oven
Fill up the following table:
Student Name: ______________________________
Blender model: _____________________________
Serial no: __________________________________
Direction: By using a defective microwave oven, fill-up the following table
Trouble
Cause of
trouble
Affected
components
Description
of
Components
Possible
Remedy
ASSESSMENT PLAN
Evidence Checklist
MAINTAINING AND REPAIRING A MICROWAVE OVEN
The evidence must show that the student …

Operation of microwave oven.

Parts of a microwave oven.

Functions of its parts.

Pre-testing procedure is performing in accordance
with manufacturer’s instruction.
System defects/fault symptoms are identified
using appropriate tools and equipment.
Identified defects and faults are explained to the
responsible person.
Results of diagnosis and testing are documented.









Troubleshooting is performed in accordance with
the service manual
Defective Parts/ components are replaced with
identical or recommended appropriate equivalents
ratings.
Repaired or replaced parts/ components are
soldered /mounted in specified location.
Control setting/adjustment are performed in
conformity with service manual specification.
Repaired activity is performed within the required
time frame.
Personal Protective Equipment is used in
accordance with occupational health and safety
practices.
Written
Ways in which evidence will be collected:
[tick the column]
Portfolio
Title of Module
Demonstration
MAINTAIN AND REPAIR ELECTRONICALLY CONTROLLED
DOMESTIC APPLIANCES
Third party Report
Unit of competency:
Oral Questioning
CONSUMER ELECTRONIC SERVICING NC II
Observation
Competency standard:
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
NOTE: Critical aspects of competency
Prepared by:
Date:
Checked by:
Date:
Observation Checklist
Candidate’s name:
Facilitator’s name:
Assessment Center
Competency standards
Unit of competency:
Instructions for the assessor:
1. Observe the candidate in Maintain and Repair Microwave oven. Describe the assessment activity and
the date on which it was undertaken.
2. Place a tick in the box to show that the candidate completed each aspect of the activity to the
standard expected in the enterprise.
3. Complete the feedback sections of the form.
Date of observation
Description of assessment activity
Location of assessment activity
The student….

Operation of microwave oven.

Parts of a microwave oven.

Functions of its parts.

Pre-testing procedure is performing in accordance with manufacturer’s instruction.


System defects/fault symptoms are identified using appropriate tools and
equipment.
Identified defects and faults are explained to the responsible person.

Results of diagnosis and testing are documented.

Troubleshooting is performed in accordance with the service manual

Personal Protective Equipment is used in accordance with occupational health and
safety practices. .
Defective Parts/ components are replaced with identical or recommended
appropriate equivalents ratings.
Repaired or replaced parts/ components are soldered /mounted in specified
location.
Control setting/adjustment are performed in conformity with service manual
specification.
Repaired activity is performed within the required time frame.




Did the candidate’s overall performance meet the standard?
If yes, tick the
box
Yes
Feedback to student’s:
Trainer’s signature:
Date:
No
Observation and Questioning Checklist
Candidate’s name:
Facilitator’s name:
Assessment Center
Competency standards
Unit of competency:
Instructions for the assessor:
1. Observe the candidate in Maintain and Repair Microwave oven
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
Location of assessment activity
The student….

Operation of microwave oven.

Parts of a microwave oven.

Functions of its parts.


Pre-testing procedure is performing in accordance with
manufacturer’s instruction.
System defects/fault symptoms are identified using appropriate tools
and equipment.
Identified defects and faults are explained to the responsible person.

Results of diagnosis and testing are documented.

Troubleshooting is performed in accordance with the service manual

Personal Protective Equipment is used in accordance with
occupational health and safety practices. .
Defective Parts/ components are replaced with identical or
recommended appropriate equivalents ratings.
Repaired or replaced parts/ components are soldered /mounted in
specified location.
Control setting/adjustment are performed in conformity with service
manual specification.
Repaired activity is performed within the required time frame.

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
Did the student’s overall performance meet the standard?
If yes, tick
the box
Yes
No
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 the trainee/student must be able to:
Materials and equipment:
 to show if
evidence is
demonstrated
During the demonstration of skills, did the candidate:

Operation of microwave oven.

Parts of a microwave oven.

Functions of its parts.

Pre-testing procedure is performing in accordance with
manufacturer’s instruction.
System defects/fault symptoms are identified using
appropriate tools and equipment.
Identified defects and faults are explained to the responsible
person.
Results of diagnosis and testing are documented.









Troubleshooting is performed in accordance with the service
manual
Personal Protective Equipment is used in accordance with
occupational health and safety practices. .
Defective Parts/ components are replaced with identical or
recommended appropriate equivalents ratings.
Repaired or replaced parts/ components are soldered
/mounted in specified location.
Control setting/adjustment are performed in conformity with
service manual specification.
Repaired activity is performed within the required time
frame.
Yes
No
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The student’s demonstration was:
Satisfactory

Not Satisfactory

Written report
Candidate’s name:
Facilitator’s name:
Assessment Center
Competency standards
Unit of competency:
Task:
Your task is to:
 Maintaining and repairing microwave oven
Submission date:
Use the checklist below as a basis for judging whether the student’s report meets
the required competency standards.
The student’s report….

Operation of microwave oven.

Parts of a microwave oven.

Functions of its parts.

Pre-testing procedure is performing in accordance with
manufacturer’s instruction.
System defects/fault symptoms are identified using
appropriate tools and equipment.
Identified defects and faults are explained to the responsible
person.
Results of diagnosis and testing are documented.









If yes, tick the box
Troubleshooting is performed in accordance with the service
manual
Personal Protective Equipment is used in accordance with
occupational health and safety practices. .
Defective Parts/ components are replaced with identical or
recommended appropriate equivalents ratings.
Repaired or replaced parts/ components are soldered
/mounted in specified location.
Control setting/adjustment are performed in conformity with
service manual specification.
Repaired activity is performed within the required time frame.
Overall did the Student’s report meet the standard?
Yes
Comments:
Candidate’s signature:
Date:
Trainer’s signature:
Date:
No