Electrolux E30SO75ESS - 30" Wall Oven Operating manual

Publication #5995505426 P/N 316439260 May 2009
Technical Service Manual
High Speed Convection
Microwave Oven
Model
E30SO75ESS

Basic Information
1-1
Safe Servicing Practices
Avoid personal injury and/or property damage by observing important Safe Servicing Practices.
Following are some limited examples of safe practices:
1. DO NOT attempt a product repair if you have any doubts as to your ability to complete the repair in a safe and
satisfactory manner.
2. Always Use The Correct Replacement Parts as indicated in the parts documentation. Substitutions may defeat
compliance with Safety Standards Set For Home Appliances. Do not exceed maximum recommended wattage on
light bulb replacements. Doing so could blow fuses and/or damage transformers.
3. Before servicing or moving an appliance:
• Remove power cord from the electrical outlet, trip circuit breaker to the OFF position, or remove fuse.
4. Never interfere with the proper operation of any safety device.
5. Use ONLY REPLACEMENT PARTS CATALOGED FOR THIS APPLIANCE. Substitutions may defeat compliance
with Safety Standards Set For Home Appliances.
6. GROUNDING: The standard color coding for safety ground wires is GREEN, or GREEN with YELLOW STRIPES.
Ground leads are not to be used as current carrying conductors. It is EXTREMELY important that the service
technician reestablish all safety grounds prior to completion of service. Failure to do so will create a hazard.
7. Prior to returning the product to service, ensure that:
• All electrical connections are correct and secure.
• All electrical leads are properly dressed and secured away from sharp edges, high-temperature components,
and moving parts.
• All non-insulated electrical terminals, connectors, heaters, etc. are adequately spaced away from all metal
parts and panels.
• All safety grounds (both internal and external) are correctly and securely connected.
• All panels are properly and securely reassembled.
© 2008 Electrolux Home Products, Inc.

1-2
Basic Information
This Manual has been prepared to provide Electrolux Service Personnel with Operation and
Service Information for an Electrolux ICON High Speed Convection Microwave Oven Model
EW30SO75ESS.
Table of Contents
Section 1 Basic Information
Safe Servicing Practices.......................................... 1-1
Table of Contents .................................................... 1-2
Warnings and Safety Information ............................ 1-3
Precautions To Be Observed Before And During
Servicing To Avoid Possible Exposure To
Excessive Microwave Energy.................................. 1-4
Before Servicing ...................................................... 1-4
Danger High Voltage ............................................... 1-4
Before Servicing ...................................................... 1-5
When Testing Is Completed .................................... 1-5
Microwave Measurement Procedure USA .............. 1-6
Microwave Measurement Procedure Canada ......... 1-7
Product Specification............................................... 1-8
Grounding Instructions ............................................ 1-9
Oven Diagram ......................................................... 1-10
Section 2 Operation
Section 2 Operation
Operating Sequence Description............................. 2-1
Off Condition ........................................................ 2-1
Cooking Condition................................................ 2-1
Variable Cooking ..................................................... 2-2
Preheat Convection Cooking Condition ............... 2-2
Convection Cooking Condition............................. 2-2
Speed Bake Cooking............................................ 2-3
Speed Grill Cooking ............................................. 2-3
Speed Roast Cooking .......................................... 2-3
Speed Cooking Of Automatic Cooking................. 2-3
Microwave Options Of Automatic Cooking........... 2-3
Oven Condition Schematics .................................... 2-4
Fire Sensing Feature (Microwave Mode.................. 2-6
Component Descriptions ......................................... 2-7
Door Open Mechanism............................................ 2-7
Door Sensing And Secondary Interlock Switches ... 2-7
Monitor Switch......................................................... 2-7
Thermistor ............................................................... 2-8
Magnetron Temperature Fuse................................. 2-8
Top Heater Thermal Cut-Out................................... 2-8
Side Heater Thermal Cut-Out.................................. 2-8
Top Heating Element............................................... 2-8
Side Heating Element............................................... 2-8
Turntable Motor ........................................................ 2-8
Fan Motor (Magnetron Side) .................................... 2-8
Fan Motor (Power Transformer Side)....................... 2-9
Convection Cooking System .................................... 2-9
Damper Open-Close Mechanism ............................. 2-10
Section 3 Troubleshooting and Testing
Warnings and Cautions ........................................... 3-1
Troubleshooting Guide Chart .................................. 3-2
Test Procedures ...................................................... 3-3
Section 4 Component Teardown
Warnings and Cautions ........................................... 4-1
Outer Case Removal............................................... 4-2
Terminal Insulator Removal..................................... 4-2
Power Supply Cord Removal .................................. 4-2
Back Plate Removal ................................................ 4-3
Power Transformer Removal................................... 4-3
Magnetron Removal ................................................ 4-4
High Voltage Capacitor And High
Voltage Rectifier Assembly Removal ...................... 4-4
Fan Motor Removal................................................. 4-5
Power Transformer Side ...................................... 4-5
Power Transformer Side ...................................... 4-5
Solid-State Relay (Magnetron Side) Removal......... 4-5
Damper Motor And Damper Switch Removal.......... 4-6
Heater Duct Left Assembly, Heater Duct Upper
Assembly And Convection Duct Assembly ............. 4-6
Side Heating Element Removal............................... 4-7
Turntable Motor Removal........................................ 4-7
Door Sensing Switch, Secondary Interlock Switch
and Monitor Switch Replacement/ Adjustment........ 4-8
Door Replacement And Adjustment ........................ 4-9
Section 5 Wire Diagrams
Wiring Schematic Oven Off Condition..................... 5-1
Backlit LED Diagram ............................................... 5-2
Function LED Diagram ............................................ 5-3
Pictorial Diagram ..................................................... 5-4
Power Unit Circuit.................................................... 5-5
CPU Unit Circuit ...................................................... 5-6
Key Function............................................................ 5-7
Section 6 Parts List
Parts Listing............................................................. 6-1
Control and Door Parts Exploded View................... 6-3
Cabinet And Frame Parts Exploded View ............... 6-4
Packing and Accessories Exploded View................ 6-5

Basic Information
1-3
THIS SERVICE MANUAL IS INTENDED FOR USE BY PERSONS HAVING ELECTRICAL AND MECHANICAL
TRAINING AND A LEVEL OF KNOWLEDGE OF THESE SUBJECTS GENERALLY CONSIDERED
ACCEPTABLE IN THE APPLIANCE REPAIR TRADE. ELECTROLUX HOME PRODUCTS CANNOT BE
RESPONSIBLE, NOR ASSUME ANY LIABILITY, FOR INJURY OR DAMAGE OF ANY KIND ARISING FROM
THE USE OF THIS MANUAL.
NEVER OPERATE THE OVEN UNTIL THE FOLLOWING POINTS ARE ENSURED.
(A) THE DOOR IS TIGHTLY CLOSED.
(B) THE DOOR BRACKETS AND HINGES ARE NOT DEFECTIVE.
(C) THE DOOR PACKING IS NOT DAMAGED.
(D) THE DOOR IS NOT DEFORMED OR WARPED.
(E) THERE IS NO OTHER VISIBLE DAMAGE WITH THE OVEN.
SERVICING AND REPAIR WORK MUST BE CARRIED OUT ONLY BY TRAINED SERVICE PERSONNEL.
CERTAIN INITIAL PARTS ARE INTENTIONALLY NOT GROUNDED AND PRESENT A RISK OF ELECTRICAL
SHOCK ONLY DURING SERVICING. SERVICE PERSONNEL - DO NOT CONTACT THE FOLLOWING PARTS
WHILE THE APPLIANCE IS ENERGIZED:
INVERTER UNIT, THAT INCLUDES HIGH VOLTAGE CAPACITOR, HIGH VOLTAGE POWER TRANSFORMER,
HIGH VOLTAGE RECTIFIER, HEAT SINK, ETC., AND MAGNETRON, HIGH VOLTAGE HARNESS ETC.;
IF PROVIDED, FAN ASSEMBLY, COOLING FAN MOTOR.
ALL THE PARTS MARKED “*” ON PARTS LIST ARE USED AT VOLTAGES MORE THAN 250V.
REMOVAL OF THE OUTER WRAPPER GIVES ACCESS TO VOLTAGE ABOVE 250V.
ALL THE PARTS MARKED “Ä” ON PARTS LIST MAY CAUSE UNDUE MICROWAVE EXPOSURE, BY
THEMSELVES, OR WHEN THEY ARE DAMAGED, LOOSENED OR REMOVED.

1-4
Basic Information
Precautions To Be Observed Before And During Servicing To Avoid
Possible Exposure To Excessive Microwave Energy
(a) Do not operate or allow the oven to be operated with the door open.
(b) Make the following safety checks on all ovens to be serviced before activating the magnetron or other microwave
source, and make repairs as necessary: (1) interlock operation, (2) proper door closing, (3) seal and sealing
surfaces (arcing, wear, and other damage), (4) damage to or loosening of hinges and latches, (5) evidence of
dropping or abuse.
(c) Before turning on microwave power for any service test or inspection within the microwave generating
compartments, check the magnetron, wave guide or transmission line, and cavity for proper alignment, integrity,
and connections.
(d) Any defective or misadjusted components in the interlock, monitor, door seal, and microwave generation and
transmission systems shall be repaired, replaced, or adjusted by procedures described in this manual before the
oven is released to the owner.
(e) A microwave leakage check to verify compliance with the Federal Performance Standard should be performed on
each oven prior to release to the owner.
Before Servicing
Before servicing an operative unit, perform a microwave emission check as per the Microwave Measurement
Procedure outlined in this service manual.
If microwave emissions level is in excess of the specified limit, contact ELECTROLUX HOME PRODUCTS, INC.
immediately.
If the unit operates with the door open, service person should:
1) Tell the user not to operate the oven.
2) Contact Electrolux HOME PRODUCTS, INC. and Food and Drug Administration’s Center for Devices and
Radiological Health immediately.
Service personnel should inform ELECTROLUX HOME PRODUCTS, INC. of any certified unit found with emissions
in excess of 4mW/cm2. The owner of the unit should be instructed not to use the unit until the oven has been brought
into compliance.
DANGER HIGH VOLTAGE
Do not energize a microwave oven with the outer case cabinet removed, because a microwave oven generates high
voltage in the circuit.
If you intend to operate the oven employing the high frequency switching power converter circuit, you should take
special precautions to avoid an electrical shock hazard.
The high voltage transformer, high voltage capacitor and high voltage diode have energized high voltage potential
of approximately 8KV.
The aluminium heat sink is connected to the switching power transistor collector pole, and has an energized high
voltage potential of approximately 650V peak.
DO NOT ACCESS THE HIGH VOLTAGE TRANSFORMER, HIGH VOLTAGE CAPACITOR, HIGH VOLTAGE
DIODE AND HEAT SINK WHEN THE POWER SUPPLY IS CONNECTED TO AN ELECTRICAL OUTLET.

Basic Information
1-5
Before Servicing
1. Disconnect the power supply cord, and then remove
outer case.
2. Open the door and block it open.
3. Discharge high voltage capacitor.
Whenever troubleshooting is performed, the power
supply must be disconnected. It may, in some cases, be
necessary to connect the power supply after the outer
case has been removed, in this event:
1. Disconnect the oven power supply cord and then
remove the outer case.
2. Open the door and block it open.
3. Discharge high voltage capacitor.
4. Disconnect leads to the primary of the inverter unit.
5. Ensure that these leads remain isolated from other
components and oven chassis by using insulation
tape.
6. After that procedure, reconnect the power supply
cord.
When Testing Is Completed
1. Disconnect the power supply cord, and then remove
outer case.
2. Open the door and block it open.
3. Discharge high voltage capacitor.
4. Reconnect leads to the primary of the inverter unit.
5. Reinstall the outer case (cabinet).
6. Reconnect the power supply cord after the outer
case is installed.
7. Run the oven and check all functions.
After repairing
1. Reconnect all leads removed from components
during testing.
2. Reinstall the outer case (cabinet).
3. Reconnect the power supply cord after the outer
case is installed.
4. Run the oven and check all functions.
Microwave ovens should not be run empty. To test
for the presence of microwave energy within a cavity,
place a cup of cold water on the oven turntable, close
the door and set the power to HIGH and then set the
microwave timer for two (2) minutes. When the two
minutes has elapsed (timer at zero) carefully check
that the water is now hot. If the water remains cold
carry out Before Servicing procedure and re-examine
the connections to the component being tested.
MICROWAVE OVENS CONTAIN CIRCUITRY CAPABLE OF PRODUCING
VERY HIGH VOLTAGE AND CURRENT. CONTACT WITH THE
FOLLOWING PARTS MAY RESULT IN A SEVERE, POSSIBLY FATAL,
ELECTRICAL SHOCK.
INVERTER UNIT, THAT INCLUDES HIGH VOLTAGE CAPACITOR,
HIGH VOLTAGE POWER TRANSFORMER, HIGH VOLTAGE RECTIFIER,
HEAT SINK ETC., AND MAGNETRON, HIGH VOLTAGE HARNESS ETC..
READ THE SERVICE MANUAL CAREFULLY AND FOLLOW ALL
INSTRUCTIONS.
Don't Touch !
Danger High Voltage
To discharge the high voltage capacitor, wait for 60
seconds and then short-circuit the connection of the
high-voltage capacitor (that is the connecting lead of the
high-voltage rectifier) against the chassis with the use
of an insulated screwdriver.
To discharge the high voltage capacitor, wait for 60
seconds and then short-circuit the connection of the
high-voltage capacitor (that is the connecting lead of the
high-voltage rectifier) against the chassis with the use
of an insulated screwdriver.

1-6
Basic Information
Microwave Measurement Procedure (USA)
A. Requirements:
1) Microwave leakage limit (Power density limit): The power density of microwave radiation emitted by a
microwave oven should not exceed 1 mW/cm2at any point 5 cm or more from the external surface of the
oven, measured prior to acquisition by a purchaser, and thereafter (through the useful life of the oven),
5 mW/cm2at any point 5 cm or more from the external surface of the oven.
2) Safety interlock switches: Primary interlock switch shall prevent microwave radiation emission in excess of the
requirement as above mentioned, secondary interlock switch shall prevent microwave radiation emission in
excess of 5 mW/cm2at any point 5 cm or more from the external surface of the oven.
B. Preparation for testing:
Before beginning the actual measurement of leakage, proceed as follows:
1) Make sure that the actual instrument is operating normally as specified in its instruction booklet.
Important:
Survey instruments that comply with the requirement for instrumentation as prescribed by the performance
standard for microwave ovens, 21 CFR 1030.10(c)(3)(i), must be used for testing.
2) Place the oven tray in the oven cavity.
3) Place the load of 275±15 ml (9.8 oz) of tap water initially at 20°±5C (68°F) in the center of the oven cavity.
The water container shall be a low form of 600 ml (20 oz) beaker with an inside diameter of approx. 8.5 cm
(3-1/2 in.) and made of an electrically nonconductive material such as glass or plastic. The placing of this
standard load in the oven is important not only to protect the oven, but also to insure that any leakage is
measured accurately.
4) Set the cooking control on Full Power Cooking Mode.
5) Close the door and select a cook cycle of several minutes. If the water begins to boil before the survey is
completed, replace it with 275 ml of cool water.
C. Leakage test:
Closed-door leakage test (microwave measurement)
1) Grasp the probe of the survey instrument and hold it perpendicular to the gap between the door and
the body of the oven.
2) Move the probe slowly, not faster than 1 in./sec. (2.5 cm/sec.) along the gap, watching for the maximum
indication on the meter.
3) Check for leakage at the door screen, sheet metal seams and other accessible positions where the continuity
of the metal has been breached (eg., around the switches, indicator, and vents). While testing for leakage
around the door pull the door away from the front of the oven as far as is permitted by the closed latch
assembly.
4) Measure carefully at the point of highest leakage and make sure that the highest leakage is no greater than
4 mW/cm2, and that the primary interlock switch and secondary interlock switch do turn the oven OFF before
any door movement.
NOTE: After servicing, record data on service invoice and microwave leakage report.

Basic Information
1-7
Microwave Measurement Procedure (Canada)
After adjustment of the door switches are completed individually or collectively, switch test and microwave leakage
test must be performed with survey instrument and test result must be confirmed to meet the requirement of the
performance standard for microwave ovens as under mentioned.
A. Requirements:
Every microwave oven shall function in such a manner that when the oven is fully assembled and operating with
its service controls and user controls adjusted to yield the maximum output, the leakage radiation, at all points at
least 5 cm. from the external surface of the oven, does not exceed:
1) 1.0 mW/cm2with the test load of 275 ± 15 ml of water at an initial temperature 20 ±5°C.
2) 5.0 mW/cm2when the outer enclosure is removed with a test load of 275 ± 15 ml of water at an initial
temperature 20±5°C.
3) 5.0 mW/cm2without a test load.
B. Preparation for testing:
Before beginning the actual measurement of leakage, proceed as follows:
1) Make sure that the actual instrument is operating normally as specified in its instruction booklet.
Survey instruments that comply with the requirement for instrumentation as prescribed by CSA and NHW
performance standard for microwave ovens must be used for testing recommended instruments are, NARDA
8100 and NARDA 8200.
2) Place the oven tray in the oven cavity.
3) Place the load of 275±15 ml (9.8 oz) of tap water initially at 20°±5C (68°F) in the center of oven cavity. The
water container shall be a low form of a 600 ml (20 oz) beaker with an inside diameter of approx. 8.5 cm
(3-1/2 in.) and made of an electrically nonconductive material such as glass or plastic. The placing of this
standard load in the oven is important not only to protect the oven, but also to insure that any leakage
is measured accurately.
4) Set the cooking control on Full Power Cooking Mode.
5) Close the door and select a cook cycle of several minutes. If the water begins to boil before the survey is
completed, replace it with 275 ml of cool water.
C. Leakage test with enclosure installed:
1) Grasp probe of survey instrument and hold it perpendicular to gap between door and the body of the oven.
2) Move the probe slowly, not faster than 2.5 cm/sec. along the gap, watching for maximum indication on meter.
3) Check for leakage at the door screen, sheet metal seams and other accessible positions where the continuity
of the metal has been breached (eg., around the switches, indicator, and vents). While testing for leakage
around door, pull door away from the front of the oven as far as is permitted by the closed latch assembly.
4) Measure carefully at the point of highest leakage and make sure that the highest leakage is no greater
than 4 mW/cm2, and that the primary interlock switch and secondary interlock switch do turn the oven
OFF before any door movement.
D. Leakage test without enclosure:
1) Remove the enclosure (cabinet).
2) Grasp the probe of the survey instrument and hold it perpendicular to all mechanical and electric parts of the
oven that is accessible to the user of the oven including, but not limited to, the waveguide, cavity seams,
magnetron gap between the door and the body of the oven.
3) Move probe slowly, not faster than 2.5 cm/sec. along the gap, watching for the maximum indication on meter.
4) Measure carefully at the point of highest leakage and make sure that the highest leakage is under 5 mW/cm2.
CAUTION: Special attention should be given to avoid electrical shock because HIGH VOLTAGE is generated
during this test.
E. No Load test
1) Operate the oven without a load and measure the leakage by the same method as the above test procedure
“ Leakage test with enclosure installed”
2) Make sure that the highest leakage does not exceed 5 mW/cm2.
NOTE: After servicing, record data on service invoice and microwave leakage report.

1-8
Basic Information
Product Specification
Item Description
Power Requirements (USA) 240 Volts
7.9 Amperes (Microwave) / 14.2 Amperes (Convection)/ 12.8 Amperes
(Speed Cooking) 60 Hertz / Single phase, 3 wire grounded.
Power Output 1000 watts (IEC 705 Test Procedure)
Operating frequency of 2450MHz
Top Heater Power Output 1500 Watts
Side Heater Power Output 1200 Watts
Case Dimensions Width 30” Height 22-7/8” Depth 25-11/16”
Cooking Cavity Dimensions Width 16-1/8”
(1.5 Cubic Feet ) Height 8-3/8”
Depth 13-5/8”
Oven Cavity Light Yes
Control Complement Touch Control System
Timer (0 - 99 min. 99 seconds)
Microwave Power for Variable Cooking
Repetition Rate;
P-HI Full power throughout the cooking time
P-90 approx. 90% of Full Power
P-80 approx. 80% of Full Power
P-70 approx. 70% of Full Power
P-60 approx. 60% of Full Power
P-50 approx. 50% of Full Power
P-40 approx. 40% of Full Power
P-30 approx. 30% of Full Power
P-20 approx. 20% of Full Power
P-10 approx. 10% of Full Power
P-0 No power throughout the cooking time
Convection Temperature for Variable Cooking
CONVECTION .......100 - 450°F Temp. control
HELP pad, Add a Minute pad, SPEED GRILL pad, SPEED ROAST pad
SPEED BAKE pad, PREHEAT pad, CONVECTION pad, REHEAT pad,
POPCORN pad, COOK pad, DEFROST pad, BASIC COOK pad,
RECIPES pad, UP / DOWN pads, ENTER pad, Number and temperature
selection pads, TIMER / CLOCK pad, STOP/CLEAR pad, POWER LEVEL
pad, START pad
Safety Standard UL Listed FCC Authorized
DHHS Rules, CFR, Title 21, Chapter 1, Subchapter J
Canadian Standards Association
Health CANADA, Industry Canada

Basic Information
1-9
Grounding Instructions
This oven is equipped with a three prong grounding plug.
It must be plugged into a wall receptacle that is properly
installed and grounded in accordance with the National
Electrical Code, local codes and ordinances. In the event
of an electrical short circuit, grounding reduces the risk of
electric shock by providing an escape wire for the electric
current.
Electrical Requirements
The electrical requirements are a 240 volt 60 Hz, AC
only, 15 amp. protected electrical supply. It is recom-
mended that a separate circuit serving only this appliance
be provided. The 240 volt circuit is absolutely necessary
for optimum cooking performance. The oven is equipped
with a 3-prong grounding plug. It must be plugged into
a wall receptacle that is properly installed and grounded.
When installing this appliance, observe all applicable
codes and ordinances.
If it is necessary to use an extension cord, use only a
3-wire extension cord that has a 3-blade grounding plug
and a 3-slot receptacle that will accept the plug on the
high speed oven. The marked rating of the extension
cord should be AC 240 volt, 15 amp. or more. Be careful
not to drape the cord over the countertop or table where it
can be pulled on by children or tripped over accidentally.
Receptacle Box Cover
3 Pronged Plug
(6-15P)
3 Pronged Receptacle
(6-15R)
IMPROPER USE OF THE GROUNDING PLUG CAN
RESULT IN A RISK OF ELECTRIC SHOCK.

1-10
Basic Information
1. Door handle. To open the door, pull the handle down
and forward. Never hold the door handle when
moving the oven.
2. Oven door with see-through window
3. Safety door latches. The oven will not operate
unless the door is securely closed.
4. Door hinges
5. Door seals and sealing surfaces
6. Turntable motor shaft
7. Removable turntable support. Carefully place the
turntable support in the center of the oven floor. After
cooking, always clean the turntable support,
especially around the rollers. These must be free
from food splashes and grease. Built-up splashes or
grease may overheat and cause arcing, begin to
smoke or catch fire.
8. Removable turntable. Place the turntable on the
turntable support securely. The turntable will rotate
clockwise or counterclockwise. Only remove for
cleaning.
9. Ventilation openings
10. Oven light. It will light when oven is operating or
door is open.
11. Waveguide cover: DO NOT REMOVE.
12. Auto-Touch control panel
13. Time display: 99 minutes, 99 seconds
14. Convection air openings
15. Removable low rack
16. Removable high rack
17. Splash guard
18. Ventilation cover: DO NOT REMOVE.
Oven Diagram
3
5
4
1
3
6
2
12
13
11
10
14
19
15
17
16
8
7
18
9
Touch Control Panel

Operation
2-1
The following is a description of component functions
during oven operation.
OFF CONDITION
Closing the door activates the door sensing switch and
secondary interlock switch. (In this condition, the monitor
switch contacts are opened.)
When oven is plugged in, 240 volts A.C. is supplied to the
control unit. (See Figure 2-1).
1. The display will show “WELCOME TOUCH CLEAR
AND TOUCH CLOCK”.
To set any program or set the clock, you must first
touch the STOP/CLEAR pad. The display will clear,
and “ : “ appears.
NOTE: When door is opened, the oven lamp comes on.
2. A signal is input to control unit, energizing the coil of
shut-off relay (RY-4). RY-4 contacts close, completing
a circuit to the damper motor. The damper motor now
operates moving the damper to the open position,
thereby closing the contacts of damper switch and
sending a signal to the control unit. The coil of relay
RY-4 is de-energized, opening its contacts, thereby
turning off the damper motor.
COOKING CONDITION
Program desired cooking time with Variable Cooking
Control by touching the NUMBER pads and the power
level pad. When the START button is touched, the
following operations occur:
1. The contacts of relays are closed and components
connected to the relays are turned on as follows.
(For details, refer to Figure 2-2)
RELAY CONNECTED COMPONENTS
RY-1 Oven Lamp / Turntable Motor
RY-2 Power Transformer
RY-3 Heating Element
RY-4 Damper Motor
RY-5 Convection Motor
RY-6 Fan Motor
2. 240 volts AC is supplied to the primary winding of
the power transformer and is converted to about
3.3 volts AC output on the filament winding, and
approximately 2300 volts AC on the high voltage
winding.
3. The filament winding voltage heats the magnetron
filament and the H.V. winding voltage is sent to a
voltage doubler circuit.
4. The microwave energy produced by the magnetron
is channeled through the waveguide into the cavity
feedbox, and then into the cavity where the food
is placed to be cooked.
5. Upon completion of the cooking time, the power
transformer, oven lamp, etc. are turned off, and the
generation of microwave energy is stopped. The
oven will revert to the OFF condition.
6. When the door is opened during a cook cycle,
monitor switch, door sensing switch, relay (RY1), the
primary interlock relay (RY2) and the secondary
interlock switch are activated with the following
results. The circuits to the turntable motor, the
cooling fan motor, and the high voltage components
are de-energized, the oven lamp remains on, and the
digital read-out displays the time still remaining in the
cook cycle when the door was opened.
7. The monitor switch is electrically monitoring the
operation of the primary interlock relay (RY2) and the
secondary interlock switch and is mechanically
associated with the door so that it will function in the
following sequence.
(1) When the door opens from a closed position, the
primary interlock relay (RY2) and the secondary
interlock switch open their contacts. And contacts
of the relay (RY1) remain closed. Then the
monitor switch contacts close.
(2) When the door is closed from the open position,
the monitor switch contacts first open, and then
the contacts of the secondary interlock switch
close. And contacts of the relay (RY1) open.
If the primary interlock relay (RY2) and the secondary
interlock switch fail with their contacts closed when the
door is opened, the closing of the monitor switch contacts
will form a short circuit through the monitor fuse, relay
(RY1), primary interlock relay (RY2) and the secondary
interlock switch, causing the monitor fuse to blow.
Operating Sequence Description

Operation
2-2
Variable Cooking
When Variable Cooking Power is programmed, 240 volts
AC is supplied to the power transformer intermittently
through the contacts of relay (RY-2). RY-2 is operated by
the control unit within an varying time base. Microwave
power operation is as follows:
Vari-Mode ON TIME OFF TIME
Power 10 (High) (100% Power) 32 sec. 0 sec.
Power 9 (P-90) (Approx. 90%) 30 sec. 2 sec.
Power 8 (P-80) (Approx. 80%) 26 sec. 6 sec.
Power 7 (P-70) (Approx. 70%) 24 sec. 8 sec.
Power 6 (P-60) (Approx. 60%) 22 sec. 10 sec.
Power 5 (P-50) (Approx. 50%) 18 sec. 14 sec.
Power 4 (P-40) (Approx. 40%) 16 sec. 16 sec.
Power 3 (P-30) (Approx. 30%) 12 sec. 20 sec.
Power 2 (P-20) (Approx. 20%) 8 sec. 24 sec.
Power 1 (P-10) (Approx. 10%) 6 sec. 26 sec.
Power 0 (P-0) (0% power) 0 sec. 32 sec.
PREHEAT CONVECTION COOKING CONDITION
Program desired convection temperature by touching the
CONVECTION pad and TEMPERATURE pad. When the
START pad is touched, the following operations occur:
(See Figure 2-3)
1. The coil of shut-off relays (RY1, RY3 and RY5) are
energized, the oven lamp, cooling fan motor, turn-
table motor and convection motor are turned on.
2. The coil of relay (RY4) is energized by the control
unit. The damper is moved to the closed position,
opening the damper switch contacts. The closing of
the damper switch contacts sends a signal to the LSI
on the control unit de-energizing the relay (RY4) and
opening the circuit to the damper motor.
3. The solid-state relays are energized by the control
unit and the main supply voltage is applied to the top
and side heating elements.
4. When the oven temperature reaches the selected
preheat temperature, the following operations occur:
A. The solid-state relays are de-energized by the
control unit temperature circuit and thermistor,
opening the circuit to the heating elements.
The ON/OFF time ratio does not correspond with the
percentage of microwave power, because approx. 2
seconds are needed for heating of the magnetron
filament.
B. The oven will continue to function for 30 minutes,
turning heater elements on and off as needed to
maintain the selected preheat temperature. The
oven will shut-down completely after 30 minutes.
CONVECTION COOKING CONDITION
When the preheat temperature is reached, a beep signal
will sound indicating that the holding temperature has
been reached in the oven cavity. Open the door and
place the food to be cooked in the oven.
Touch CONVECTION pad first and then TEMPERATURE
pad. Program desired cooking time by touching the
NUMBER pads. When the START pad is touched, the
following operations occur: (See Figure 2-3)
1. The numbers on the digital read-out start to count
down to zero.
2. The oven lamp, turntable motor, cooling fan motor
and convection motor are energized.
3. The damper is moved to the closed position.
4. The solid-state relays are energized (if the cavity
temperature is lower than the selected temperature)
and the main supply voltage is applied to the heating
elements to return to selected cooking temperature.
5. Upon completion of cooking time, the audible signal
will sound, and oven lamp, turntable motor, cooling
fan motor and convection motor are de-energized.
At the end of the convection cycle, if the cavity air
temperature is above 230°F, the circuit to RY5 will be
maintained (by the thermistor circuit) to continue
operation of cooling fan motor until the temperature
drops below 195°F, at which time the relay will be
de-energized, turning off the fan motor. Relay RY3
will however, open as soon as the convection cycle
has ended, turning off the convection fan motor.
6. At the end of the convection cook cycle, if the cavity
air temperature is below 250°F, shut-off relay (RY4)
is energized turning on the damper motor. The
damper is returned to the open position, closing the
damper switch contacts which send a signal to the
control unit, de-energizing shut-off relay (RY4).
When “Preheat” and “Convection” is programmed
continuously, after preheat, the heating elements
operate as follows.
When one of 100°F to 375°F is selected, for the first
1 minute, the top and side heating elements are not
energized. When one of 400°F to 450°F is selected,
for the first 2 minutes, the top and side heating
elements are not energized.

Operation
2-3
SPEED BAKE COOKING
Touch the BAKE pad and then enter cooking time. When
the start pad is touched, the following operations occur:
(See Figure 2-3)
1. The contacts of the relays RY1, RY3 and RY5 are
closed, and oven lamp, turntable motor, convection
motor and fan motors are energized.
2. The damper is moved to the closed position.
3. The solid-state relays are energized and the main
supply voltage is applied to the top and side heating
elements.
SPEED GRILL COOKING
Touch the GRILL pad and then enter cooking time. When
the start pad is touched, following operations occur:
(See Figure 2-4)
1. The contacts of the relays RY1, RY3, RY5 and RY6
are closed, and the oven lamp, turntable motor,
convection motor and fan motors are energized.
2. The damper is moved to the closed position.
3. The solid-state relays are energized and the main
supply voltage is applied to the top and side heating
elements.
The rotate direction of the convection motor is the same
as one of the convection cooking.
After cooking, the operation of the fan motors, damper
motor is the same as one of the convection cooking.
The rotate direction of the convection motor is reverse
to one of the convection cooking by the relay RY6.
After cooking, the operation of the fan motors, damper
motor is the same as one of the convection cooking.
SPEED ROAST COOKING
Touch the ROAST pad and then enter cooking time.
When the start pad is touched, the following operations
occur: (See Figure 2-5)
1. The contacts of the relays RY1, RY3 and RY5 are
closed, and oven lamp, turntable motor, convection
motor and fan motors are energized.
2. The damper is moved to the closed position.
3. The solid-state relays and relay RY2 are energized
alternately, and the main supply voltage is applied
to the top and side heating elements and the power
transformer alternately.
SPEED COOKING OF AUTOMATIC COOKING
(BASIC COOK, RECIPES)
Speed cooking of Automatic cooking will automatically
compute the oven temperature, microwave power and
cooking time. And the oven will cook according to the
special cooking sequence.
MICROWAVE OPTIONS OF AUTOMATIC COOKING
(REHEAT, POPCORN, COOK, DEFROST)
Microwave options of Automatic cooking will automatically
compute the microwave power, cooking time or defrosting
time. The oven will cook according to the special cooking
sequence.
The rotate direction of the convection motor is the same
as one of the convection cooking for the first time. But
for the last 15 minutes, the direction is reverse by the
relay RY6.
After cooking, the operation of the fan motors, damper
motor is the same as one of the convection cooking.

Operation
2-4
SCHEMATIC
NOTE: CONDITION OF OVEN
1. DOOR CLOSED.
2. CLOCK APPEARS ON DISPLAY.
LV TTransformer
C
2
C1
C4
C3
T6
T7 T4
A3T2
AA11
D9
R
Y2
RY1
RY5
R
Y4
RY3
RY6
1.0µF
AC 2300V
N.O.
N.O.
JM
DM
F
M
FM
OL
TTM
COM .
B
3
B4
B1
B2
B5
B
6
D7
D5
D3
E3
E5
E1
D1
240V 60 Hz
ORG
BRN
RED
BLK
ORG
RED
R
ED
RED
N.O. COM.
T1
T3
NOTE: " " indicates components with potential above 250V.
1. Circuits/ Wire colors subject to change without notice.
Notes:
BLK
BLK
BLK
BLK
BLK
BLK
BLK
GRN
GND
WHT WHT
WHT
GRY
GRY
GRY
WHT
Fuse
20A
Red Red
Red
Red
BRN
BRN
BRN
Side Heater
Thermal
Cut-out
MG
Temp. Fuse
Top Heater
Thermal
Cut-out
Com. Primary
Interlock Relay
Solid-State Relay
Solid-State Relay
Fuse
F10A
Control Unit
Fuse 12.5A
GRN
GRN
GRN
BRN
GRN
WHT
BLK
BLK
RED
BLU
RED
RED
BLU
BLU
ORG
ORGORG
ORG
ORG
Secondary
Interlock Switch
BLK
BLK
BLK
RED
RED
RED
Fan Motor
Oven Lamp
Damper Motor
Jet Motor
GRY GRY
GRY
GRY
GRY
WHT
WHT
WHT WHT
WHT
WHT
BLU
Damper
Switch
Door
Sensing
Switch
Thermistor
RED
RED
BLK
ORG
Magnetron
Power
Transformer With 150˚C Thermostat
In Primary Winding
Capacitor
Rectifier
Side Heater Top Heater
Monitor Switch
Turn Table Motor
BLK
BLKGRY
GRY
WHT
GRY GRY
GRY
ORG
SCHEMATIC
NOTE: CONDITION OF OVEN
1. DOOR CLOSED.
2. CLOCK APPEARS ON DISPLAY.
LV TTransformer
C
2
C1
C4
C3
T6
T7 T4
A3T2
AA11
D9
R
Y2
RY1
RY5
R
Y4
RY3
RY6
1.0µF
AC 2300V
N.O.
N.O.
JM
DM
F
M
FM
OL
TTM
COM .
B
3
B4
B1
B2
B5
B
6
D7
D5
D3
E3
E5
E1
D1
240V 60 Hz
ORG
BRN
RED
BLK
ORG
RED
R
ED
RED
N.O. COM.
T1
T3
NOTE: " " indicates components with potential above 250V.
1. Circuits/ Wire colors subject to change without notice.
Notes:
BLK
BLK
BLK
BLK
BLK
BLK
BLK
GRN
GND
WHT WHT
WHT
GRY
GRY
GRY
WHT
Fuse
20A
Red Red
Red
Red
BRN
BRN
BRN
Side Heater
Thermal
Cut-out
MG
Temp. Fuse
Top Heater
Thermal
Cut-out
Com. Primary
Interlock Relay
Solid-State Relay
Solid-State Relay
Fuse
F10A
Control Unit
Fuse 12.5A
GRN
GRN
GRN
BRN
GRN
WHT
BLK
BLK
RED
BLU
RED
RED
BLU
BLU
ORG
ORGORG
ORG
ORG
Secondary
Interlock Switch
BLK
BLK
BLK
RED
RED
RED
Fan Motor
Oven Lamp
Damper Motor
Jet Motor
GRY GRY
GRY
GRY
GRY
WHT
WHT
WHT WHT
WHT
WHT
BLU
Damper
Switch
Door
Sensing
Switch
Thermistor
RED
RED
BLK
ORG
Magnetron
Power
Transformer With 150˚C Thermostat
In Primary Winding
Capacitor
Rectifier
Side Heater Top Heater
Monitor Switch
Turn Table Motor
BLK
BLKGRY
GRY
WHT
GRY GRY
GRY
ORG
Figure 2-1. Oven Off Condition
Figure 2-2. Oven Schematic-Microwave Cooking Condition

Operation
2-5
LV TTransformer
C
2
C1
C4
C3
T6
T7 T4
A3T2
AA11
D9
R
Y2
RY1
RY5
R
Y4
RY3
RY6
1.0µF
AC 2300V
N.O.
N.O.
JM
DM
F
M
FM
OL
TTM
COM .
B
3
B4
B
1
B2
B5
B
6
D7
D5
D3
E3
E5
E1
D1
240V 60 Hz
ORG
BRN
RED
BLK
ORG
RED
R
ED
RED
N.O. COM.
T1
T3
1. Circuits/ Wire colors subject to change without notice.
Notes:
BLK
BLK
BLK
BLK
BLK
BLK
BLK
GRN
GND
WHT WHT
WHT
GRY
GRY
GRY
WHT
Fuse
20A
Red Red
Red
Red
BRN
BRN
BRN
Side Heater
Thermal
Cut-out
MG
Temp. Fuse
Top Heater
Thermal
Cut-out
Com. Primary
Interlock Relay
Solid-State Relay
Solid-State Relay
Fuse
F10A
Control Unit
Fuse 12.5A
GRN
GRN
GRN
BRN
GRN
WHT
BLK
BLK
RED
BLU
RED
RED
BLU
BLU
ORG
ORGORG
ORG
ORG
Secondary
Interlock Switch
BLK
BLK
BLK
RED
RED
RED
Fan Motor
Oven Lamp
Damper Motor
Jet Motor
GRY GRY
GRY
GRY
GRY
WHT
WHT
WHT WHT
WHT
WHT
BLU
Damper
Switch
Door
Sensing
Switch
Thermistor
RED
RED
BLK
ORG
Magnetron
Power
Transformer With 150˚C Thermostat
In Primary Winding
Capacitor
Rectifier
Side Heater Top Heater
Monitor Switch
Turn Table Motor
BLK
BLKGRY
GRY
WHT
GRY GRY
GRY
ORG
SCHEMATIC (CONVECTION)
NOTE: CONDITION OF OVEN
1. DOOR CLOSED.
2. CONVECTION PAD TOUCHED.
3. DESIRED TEMPERATURE SELECTED.
4. COOKING TIME PROGRAMMED.
5. “START” PAD TOUCHED.
SCHEMATIC (SPEED REHEAT)
NOTE: CONDITION OF OVEN
1. DOOR CLOSED.
2. REHEAT PAD TOUCHED.
3. DESIRED TEMPERATURE SELECTED.
4. COOKING TIME PROGRAMMED.
5. “START” PAD TOUCHED.
SCHEMATIC (SPED BAKED)
NOTE: CONDITION OF OVEN
1. DOOR CLOSED.
2. BAKED PAD TOUCHED.
3. COOKING TIME PROGRAMMED.
4. “START” PAD TOUCHED.
LV TTransformer
C
2
C1
C4
C3
T6
T7 T4
A3T2
AA11
D9
R
Y2
RY1
RY5
RY4 RY3
RY6
1.0µF
AC 2300V
N.O.
N.O.
JM
DM
F
M
FM
OL
TTM
COM .
B
3
B4
B
1
B
2
B5
B
6
D7
D5
D3
E3
E5
E1
D1
240V 60 Hz
ORG
BRN
RED
BLK
ORG
RED
R
ED
RED
N.O. COM.
T1
T3
NOTE: " " indicates components with potential above 250V.
1. Circuits/ Wire colors subject to change without notice.
Notes:
BLK
BLK
BLK
BLK
BLK
BLK
BLK
GRN
GND
WHT WHT
WHT
GRY
GRY
GRY
WHT
Fuse
20A
Red Red
Red
Red
BRN
BRN
BRN
Side Heater
Thermal
Cut-out
MG
Temp. Fuse
Top Heater
Thermal
Cut-out
Com. Primary
Interlock Relay
Solid-State Relay
Solid-State Relay
Fuse
F10A
Control Unit
Fuse 12.5A
GRN
GRN
GRN
BRN
GRN
WHT
BLK
BLK
RED
BLU
RED
RED
BLU
BLU
ORG
ORGORG
ORG
ORG
Secondary
Interlock Switch
BLK
BLK
BLK
RED
RED
RED
Fan Motor
Oven Lamp
Damper Motor
Jet Motor
GRY GRY
GRY
GRY
GRY
WHT
WHT
WHT WHT
WHT
WHT
BLU
Damper
Switch
Door
Sensing
Switch
Thermistor
RED
RED
BLK
ORG
Magnetron
Power
Transformer With 150˚C Thermostat
In Primary Winding
Capacitor
Rectifier
Side Heater Top Heater
Monitor Switch
Turn Table Motor
BLK
BLKGRY
GRY
WHT
GRY GRY
GRY
ORG
SCHEMATIC
NOTE: CONDITION OF OVEN
1. DOOR CLOSED.
2. GRILL PAD TOUCHED.
3. COOKING TIME PROGRAMMED.
4. “START” PAD TOUCHED.
Figure 2-3. Oven Schematic-Convection, Reheat, Speed Bake Cooking Condition
Figure 2-4. Oven Schematic-Speed Grill Cooking Condition

Operation
2-6
LV TTransformer
C
2
C1
C4
C3
T6
T7 T4
A3T2
AA11
D9
R
Y2
RY1
RY5
RY4 RY3
RY6
1.0µF
AC 2300V
N.O.
N.O.
JM
DM
F
M
FM
OL
TTM
COM .
B
3
B4
B
1
B
2
B5
B
6
D7
D5
D3
E3
E5
E1
D1
240V 60 Hz
ORG
BRN
RED
BLK
ORG
RED
R
ED
RED
N.O. COM.
T1
T3
1. Circuits/ Wire colors subject to change without notice.
Notes:
BLK
BLK
BLK
BLK
BLK
BLK
BLK
GRN
GND
WHT WHT
WHT
GRY
GRY
GRY
WHT
Fuse
20A
Red Red
Red
Red
BRN
BRN
BRN
Side Heater
Thermal
Cut-out
MG
Temp. Fuse
Top Heater
Thermal
Cut-out
Com. Primary
Interlock Relay
Solid-State Relay
Solid-State Relay
Fuse
F10A
Control Unit
Fuse 12.5A
GRN
GRN
GRN
BRN
GRN
WHT
BLK
BLK
RED
BLU
RED
RED
BLU
BLU
ORG
ORGORG
ORG
ORG
Secondary
Interlock Switch
BLK
BLK
BLK
RED
RED
RED
Fan Motor
Oven Lamp
Damper Motor
Jet Motor
GRY GRY
GRY
GRY
GRY
WHT
WHT
WHT WHT
WHT
WHT
BLU
Damper
Switch
Door
Sensing
Switch
Thermistor
RED
RED
BLK
ORG
Magnetron
Power
Transformer With 150˚C Thermostat
In Primary Winding
Capacitor
Rectifier
Side Heater Top Heater
Monitor Switch
Turn Table Motor
BLK
BLKGRY
GRY
WHT
GRY GRY
GRY
ORG
SCHEMATIC
NOTE: CONDITION OF OVEN
1. DOOR CLOSED.
2. ROAST PAD TOUCHED.
3. COOKING TIME PROGRAMMED.
4. “START” PAD TOUCHED.
NOTE: The solid-state relays and relay RY2 are energized alternately.
For last 15 minutes, the contacts of relay RY6 will contact D5.
Figure 2-5. Oven Schematic-Speed Roast Cooking Condition
FIRE SENSING FEATURE (MICROWAVE MODE)
This model incorporates a sensing feature which will stop
the oven’s operation if there is a fire in the oven cavity
during microwave cooking. This fire sensing feature will
operate when the microwave power level is set to 80% or
more. This is accomplished by the LSI repeatedly
measuring voltage across the temperature measurement
circuit (thermistor) during it’s 32-seconds time base and
comparing the obtained voltage measurements. If the
most recent voltage measured is 300 mV greater than the
previous voltage measured, the LSI judges it as a fire in
the oven cavity and switches off the relays to the power
transformer, fan motor and convection motor. The LSI
also stops counting down and closes the damper door so
that no fresh air will enter the oven cavity. Please refer to
the following section for a more detailed description.
Operation
Please refer to the timing diagrams.
1. The fire sensing will start after 30 minutes when the
oven is started.
2. The thermistor operates within a 32-seconds time
base and it is energized for three (3) seconds and off
for 29 seconds. Two (2) seconds after thermistor is
energized, the voltage across the temperature
measurement circuit is sampled by the LSI and
twenty five (25) seconds after the thermistor is cut
off, the LSI turns on the convection fan for three (3)
seconds.
3. The above procedure is repeated. If the difference
between the first voltage measured (in step 1) and
the voltage measured when the procedure is repeat-
ed (step 2) is greater than 300 mV the LSI makes the
judgment that there is a fire in the oven cavity and
will switch off the relays to the power transformer,
fan motor and convection motor. The LSI also stops
counting down and closes the damper door so that
no fresh air will enter the oven cavity.
4. Once the fire sensor feature has shut the unit down,
the programmed cooking cycle may be resumed by
pressing the START pad or the unit may be reset by
pressing the CLEAR pad.
CONVECTION
MOTOR
THERMISTOR
Sensing
Voltage
ON
OFF
ON
OFF
ON
OFF
0 2 3 28 31 32 (sec.) 64 (sec.)
3 sec.
Sensing the voltage across temperature measurement circuit.
3 sec.

Operation
2-7
DOOR OPEN MECHANISM
The door is opened by pulling the door handle down and
forward, referring to Figure 2-6. When the door handle is
pulled down, the latch heads are moved upward. When
the door handle is pulled forward, the latch heads are
released from the latch hooks right and left. Now, the
door will open.
Figure 2-6.
Component Descriptions
Monitor Switch
Latch Hook Left
Door Handle
Latch
Head
Secondary
Interlock Switch
Door
Sensing
Latch Hook Right
Latch
Head
Switch
MONITOR SWITCH
The monitor switch is mounted on the upper position of
latch hook left. It is activated (the contacts opened) by
the left latch head while the door is closed. The switch
is intended to render the oven inoperative by means of
blowing the monitor fuse when the contacts of the
primary interlock relay and secondary interlock switch fail
to open when the door is opened.
Functions:
1. When the door is opened, the monitor switch contact
closes (to the ON condition) due to their being
normally closed. At this time, the door sensing and
secondary interlock switches are in the OFF condi-
tion (contacts open) due to their being normally open
contact switches.
2. As the door goes to a closed position, the monitor
switch contacts are first opened and then the door
sensing switch and the secondary interlock switch
contacts close. (On opening the door, each of these
switches operate inversely.)
3. If the door is opened, and the primary interlock relay
and secondary interlock switch contacts fail to open,
the monitor fuse blows simultaneously with closing of
the monitor switch contacts.
Before replacing a blown monitor fuse test the door
sensing switch, primary interlock relay, secondary inter-
lock switch and monitor switch for proper operation.
Monitor fuse and switch are replaced as an assembly.
DOOR SENSING AND SECONDARY INTERLOCK
SWITCHES
The door sensing switch in the primary interlock system
is mounted in the lower position on the latch hook right,
the secondary interlock switch is mounted in the lower
position on the latch hook left. They are activated by the
latch heads on the door. When the door is opened, the
switches interrupt the circuit to all components except
for the oven lamp. A cook cycle cannot take place until
the door is firmly closed thereby activating both interlock
switches. The primary interlock system consists of the
door sensing switch and primary interlock relay located
on the control circuit board.

Operation
2-8
THERMISTOR
The thermistor is a negative temperature coefficient type.
The temperature in the oven cavity is detected through
the resistance of the thermistor, and then the control unit
causes the heater relay to operate, thus the current to the
heating elements is turned ON/OFF. If the convection
cooking or some cooking modes which use the top / side
heating elements is started and the oven temperature
does not rise above 100°F (37.8°C), the control unit will
stop the oven after 10 minutes. In this case, the
thermistor may be opened.
MAGNETRON TEMPERATURE FUSE
The temperature fuse located on the waveguide flange is
designed to prevent damage to the magnetron if an over
heated condition develops in the magnetron due to
cooling fan failure, obstructed air guide, dirty or blocked
air intake, etc.
Under normal operation, the temperature fuse remains
closed. However, when abnormally high temperatures
are reached within the magnetron, the temperature fuse
will remain open at 302°F (150°C) causing the oven to
shut down.
TOP HEATER THERMAL CUT-OUT
The thermal cut-out located on the thermal cover upper is
designed to prevent damage to the top heating element
unit if an overheated condition develops in the top
heating element unit due to convection fan failure,
thermistor failure, obstructed air ducts, dirty or blocked air
intake, etc.
Under normal operation, the thermal cut-out remains
closed. However, when abnormally high temperature are
reached within the top heating element unit, the thermal
cut-out will open at 338°F (170°C) causing the oven to
shut down. When the thermal cut-out has cooled, the
thermal cut-out closes at 311°F (155°C).
SIDE HEATER THERMAL CUT-OUT
The thermal cut-out located on the thermal cover left is
designed to prevent damage to the side heating element
unit if an over heated condition develops in the top
heating element unit due to convection fan failure,
thermistor failure, obstructed air ducts, dirty or blocked air
intake, etc.
Under normal operation, the thermal cut-out remains
closed. However, when abnormally high temperature are
reached within the side heating element unit, the thermal
cut-out will open at 302°F (150°C) causing the oven to
shut down. When the thermal cut-out has cooled, the
thermal cut-out closes at 266°F (130°C).
TOP HEATING ELEMENT
The top heating element is located at the top of the oven
cavity. It is intended to heat air driven by the convection
fan. The heated air is kept in the oven and force
circulated and reheated by the top heating element.
SIDE HEATING ELEMENT
The side heating element is located at the left side of the
oven cavity. It is intended to heat air driven by the
convection fan. The heated air is kept in the oven and
force circulated and reheated by the top heating element.
TURNTABLE MOTOR
The turntable motor rotates the turntable located in
the bottom of the oven cavity, so that the food on the
turntable is cooked evenly during cooking. The turntable
may turn in either direction.
FAN MOTOR (MAGNETRON SIDE)
The fan motor drives a blade which draws external cool
air. This cool air is directed through the air vents
surrounding the magnetron and cools the magnetron.
This air is channelled through the oven cavity to remove
steam and vapors given off from the heating foods. It is
then exhausted through the exhausting air vents at the
oven cavity.