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Liesegang Projector Dv 900 Specifications

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    							Technical Specifications* Liesegang dv 481 Liesegang dv 483 Liesegang dv 486plus Liesegang dv 488active NEW! Liesegang dv 900
    Entry-projector with 2,200 ANSI lumens. 
    Excellent equipment for the small budget.Ideal for medium-sized school- and conference 
    rooms. Extensive features like Unplug&Go, Wide-
    angle lens and Vertical Keystone Correction.Ideal for large rooms, like assembly halls and 
    conference rooms. Extensive features like 
    Unplug&Go, Wide-angle lens and Vertical Keystone 
    Correction.Projector with Whiteboard Function. 
    No asset- and assembly costs for a whiteboard. 
    Extensive features. Convincing price.Installation projector - ideal for use in large seminar 
    and conference rooms. Extensive equipment 
    features for flexible use.
    General dv 481 dv 483 dv 486plus dv 488active dv 900Technology3x 0.63 p-Si LCD 3x 0.63 p-Si LCD 3x 0.63 p-Si LCD 3x 0.63 p-Si LCD 3x 0.8 p-Si LCD
    ResolutionXGA, 1.024 x 768 pixel XGA, 1.024 x 768 pixel XGA, 1.024 x 768 pixel XGA, 1.024 x 768 pixel XGA, 1.024 x 768 pixel
    Brightness Standard mode2.200 ANSI lumens 2.600 ANSI lumens 3.200 ANSI lumens 2.800 ANSI lumens 4,500 ANSI lumens
    Brightness Whisper modek.A. 2.080 ANSI lumens 2.600 ANSI lumens 2.240 ANSI lumens 3,800 ANSI lumens
    Contrast ratio500:1 500:1 500:1 500:1 500:1
    Weight2.9 kgs 2.9 kgs 2.9 kgs 2.9 kgs 
    						
    							R-308JK
    R-308JS
    R-308JW
    R-309JW
    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 SHARP ELECTRONICS
    CORPORATION immediately  @1-800-237-4277.
    If the unit operates with the door open, service person should 1) tell the user not to operate the oven
    and 2) contact SHARP ELECTRONICS CORPORATION and Food and Drug Administrations
    Center for Devices and Radiological Health immediately.
    Service personnel should inform SHARP ELECTRONICS CORPORATION of any certified unit found
    with emissions in excess of 4mW/cm
    2. The owner of the unit should be instructed not to use the unit
    until the oven has been brought into compliance. 
    						
    							R-308JK
    R-308JS
    R-308JW
    R-309JW
    1
    WARNING TO SERVICE PERSONNEL
    Microwave ovens contain circuitry capable of pro-
    ducing very high voltage and current, contact with
    following parts 
     may result in a severe, possibly
    fatal, electrical shock.
    (Example)
    High Voltage Capacitor, High Voltage Power Trans-
    former, Magnetron, High Voltage Rectifier Assem-
    bly,  High Voltage Harness etc..
    Read the Service Manual carefully and follow all
    instructions.
    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.
    WARNING: RISK OF ELECTRIC SHOCK.
    DISCHARGE THE HIGH-VOLTAGE
    CAPACITOR BEFORE SERVICING.
    The high-voltage capacitor remains charged about 60 sec-
    onds after the oven has been switched off. 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.
    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 power supply cord, and then remove outer
    case.
    2. Open the door and block it open.
    3. Discharge high voltage capacitor.
    4.Disconnect the leads to the primary of the power transformer.
    5.Ensure that the leads remain isolated from other components
    and oven chassis by using insulation tape.
    6. After that procedure, reconnect the power supply cord.
    When the 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 the leads to the primary of the power transformer.
    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 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 connec-
    tions to the component being tested.
    When all service work is completed and the oven is fully
    assembled, the microwave power output should be checked
    and a microwave leakage test should be  carried out.
    Dont Touch !
    Danger High Voltage 
    						
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    R-309JW
    2
    MICROWAVE MEASUREMENT PROCEDURE
    A. Requirements:
    1)Microwave leakage limit (Power density limit): The power density of microwave radiation emitted by a microwave oven should
    not exceed 1mW/cm
    2 at any point 5cm 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/cm2 at any point 5cm or more from the external surface
    of the oven.
    2) Safety interlock switches:
     Primary interlock relay and door sensing 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/cm
    2 at any point
    5cm 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±5˚C (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 4mW/cm
    2, and that
    the secondary interlock switch and the primary interlock relay do turn the oven OFF before any door movement.
    NOTE:  After servicing, record data on service invoice and microwave leakage report. 
    						
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    3
    SHARP ELECTRONICS CORPORATION
    SHARP PLAZA, MAHWAH,
    NEW JERSEY 07430-2135
    SERVICE MANUAL
    MICROWAVE OVEN
    R-308JK/ R-308JS/ R-308JW/ R-309JW
    FOREWORD
    This Manual has been prepared to provide Sharp Electronics Corp.
    Service Personnel with Operation and Service Information for the SHARP
    MICROWAVE OVENS,R-308JK, R-308JS, R-308JW and R-309JW.
    It is recommended that service personnel carefully study the entire text of
    this manual so that they will be qualified to render satisfactory customer
    service.
    Check the interlock switches and the door seal carefully. Special attention
    should be given to avoid electrical shock and microwave radiation hazard.
    WARNING
    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.
    DANGER
    Certain initial parts are intentionally not grounded and present
    a risk of electrical shock only during servicing. Service person-
    nel - Do not contact the following parts while the appliance is
    energized;
    High Voltage Capacitor, Power Transformer, Magnetron, High
    Voltage Rectifier Assembly,  High Voltage Harness;
    If provided, Vent Hood, Fan assembly, Cooling Fan Motor.
    All the parts marked “*” on parts list are used at voltages more than
    250V.
    Removal of the outer wrap gives access to voltage above 250V.
    All the parts marked “∆” on parts list may cause undue microwave
    exposure, by themselves, or when they are damaged, loosened or
    removed.
    PRODUCT DESCRIPTION
    GENERAL INFORMATION
    OPERATION
    TROUBLESHOOTING GUIDE AND
    TEST PROCEDURE
    TOUCH CONTROL PANEL
    COMPONENT REPLACEMENT
    AND ADJUSTMENT PROCEDURE
    WIRING DIAGRAM
    PARTS LIST 
    						
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    4
    ITEM DESCRIPTION
    Power Requirements 120 Volts / 13.5 Amperes
    60 Hertz
    Single phase, 3 wire grounded
    Power Output 1100 watts (IEC TEST PROCEDURE)
    Operating frequency of 2450MHz
    Case Dimensions Width 20-1/2 Height 12-1/4
    Depth  17-3/8
    Cooking Cavity Dimensions Width 14-1/2 Height 8-1/8
    1.0 Cubic Feet Depth  15-1/4
    Control Complement Touch Control SystemClock ( 1:00 - 12:59 )
    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
    POPCORN pad, MINUTE PLUS pad
    SHORT CUTS pads, REHEAT pad, COOK pad
    DEFROST pad, Number selection pads
    POWER LEVEL pad, TIMER/CLOCK pad
    STOP/CLEAR pad, START pad
    Oven Cavity Light Yes
    Safety Standard UL Listed                FCC Authorized
    DHHS Rules, CFR, Title 21, Chapter 1, Subchapter J
    SPECIFICATION
    GENERAL INFORMATION
    GROUNDING INSTRUCTIONS
    This oven is equipped with a three prong grounding plug. It must be plug\
    ged into a wall receptacle that is properly installed a nd
    grounded in accordance with the National Electrical Code and 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 e lectric
    current.
    WARNING: Improper use of the grounding plug can result in a risk of electric shoc\
    k.
    Electrical Requirements
    The electrical requirements are a 120 volt 60 Hz, AC only,
    15 or 20 amp. fused electrical supply. It is recommended that a separate\
     circuit serving only this appliance be provided. When
    installing this appliance, observe all applicable codes and ordinances.
    A short power-supply cord is provided to reduce risks of becoming entang\
    led in or tripping  over a longer cord.
    Where a two-pronged wall-receptacle is encountered, it is the personal r\
    esponsibility and obligation of the customer to contact  a
    qualified electrician and have it replaced with a properly grounded thre\
    e-pronged wall receptacle or have a grounding adapter
    NOTE: Internal capacity is calculated by measuring
    maximum width, depth and height.
    Actual capacity for holding food is less. 
    						
    							R-308JK
    R-308JS
    R- 308JW
    R- 309JW
    5
    properly grounded and polarized. If the extension cord must be used, it
    should be a 3-wire, 15 amp. or higher rated cord. Do not drape over a
    countertop or table where it can be pulled on by children or tripped ove\
    r
    accidentally.
    CAUTION: DO 
    NOT UNDER ANY CIRCUMSTANCES CUT OR REMOVE
    THE ROUND GROUNDING PRONG FROM THIS PLUG.
    OVEN DIAGRAM
    1 Door opening button
    Push to open door.
    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.
    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 (Rear)
    10 Oven light
    It will light when oven is operating or when the door is open.
    11 Waveguide cover: DO NOT REMOVE.
    12 Auto-Touch control panel
    13 Time display: 99 minutes, 99 seconds
    14 Power supply cord
    NOTE:
    Some one-touch cooking features such as MINUTE PLUS are disabled
    after three minutes when the oven is not in use. These features are
    automatically enabled when the door is opened and closed or the STOP/
    CLEAR pad is pressed.
    3-Pronged
    Plug Grounded
    Receptacle Box
    Grounding Pin
    3-Pronged Receptacle
    14
    8 9
    7
    12 13
    1
    59
    324
    6
    11 310
    TOUCH  CONTROL PANEL 
    						
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    6
    OPERATION
    DESCRIPTION OF OPERATING SEQUENCE
    The following is a description of component functions during
    oven operation.
    OFF CONDITION
    Closing the door activates the door sensing switch and second-
    ary interlock switch. (In this condition, the monitor switch
    contacts are opened.)
    When oven is plugged in, 120 volts A.C. is supplied to the
    control unit. (Figure O-1).
    1. The display will show flashing 88:88.
    To set any program or set the clock, you must first touch
    the STOP/CLEAR pad. The display will clear, and   :   will
    appear.
    COOKING CONDITION
    Program desired cooking time by touching the NUMBER pads.
    Program the power level by touching the POWER LEVEL pad.
    When the START pad 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 O-2)
    RELAY CONNECTED COMPONENTS
    RY-1 oven lamp/turntable motor/fan motor
    RY-2 power transformer
    2.120 volts A.C. is supplied to the primary winding of the
    power transformer and is converted to about 3.3 volts A.C.
    output on the filament winding, and approximately 2360
    volts A.C. 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
    channelled through the waveguide into the cavity feed-box,
    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, the monitor
    switch, door sensing switch, secondary interlock switch,
    relay (RY1) and primary interlock relay 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 electrically monitors the operation of the
    secondary interlock switch and primary interlock relay and
    is mechanically associated with the door so that it will
    function in the following sequence.(1)When the door opens from the closed position, the primary
    interlock relay (RY2) and secondary interlock switch open
    their contacts. And contacts of the relay (RY1) remains
    closed. Then the monitor switch contacts close.
    (2)When the door is closed from the open position, the monitor
    switch contacts open first. Then the contacts of the secondary
    interlock switch and door sensing switch close. And contacts
    of the relay (RY1) open.
    If the secondary interlock switch and primary interlock relay
    (RY2) fail with the contacts closed when the door is opened, the
    closing of the monitor switch contacts will form a short circuit
    through the C/T fuse, secondary interlock switch, relay (RY1)
    and primary interlock relay (RY2), causing the C/T fuse to blow.
    POWER LEVEL P-0 TO P-90 COOKING
    When Variable Cooking Power is programmed, the 120 volts
    A.C. is supplied to the power transformer intermittently through
    the contacts of relay (RY-2) which is operated by the control
    unit within a 32 second time base. Microwave power operation
    is as follows:
    VARI-MODE ON TIME OFF TIME
    P-HI (100% power) 32 sec. 0 sec.
    P-90 (approx. 90% power) 30 sec. 2 sec.
    P-80 (approx. 80% power) 26 sec. 6 sec.
    P-70 (approx. 70% power) 24 sec. 8 sec.
    P-60 (approx. 60% power) 22 sec. 10 sec.
    P-50 (approx. 50% power) 18 sec. 14 sec.
    P-40 (approx. 40% power) 16 sec. 16 sec.
    P-30 (approx. 30% power) 12 sec. 20 sec.
    P-20 (approx. 20% power)  8 sec. 24 sec.
    P-10 (approx. 10% power)  6 sec. 26 sec.
    P-0 (approx. 0% power)  0 sec. 32 sec.
    Note: The ON/OFF time ratio does not correspond with
    the percentage of microwave power, because
    approx. 3 seconds are needed for heating of the
    magnetron filament.
    POWER OUTPUT REDUCTION
    If the oven is set for more than 20 minutes at 80, 90 or 100%
    power level, after the first 20 minutes the power level will
    automatically adjust itself to 70% power to avoid overcooking. 
    						
    							R-308JK
    R-308JS
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    7 Figure O-1. Oven Schematic-Off Condition
    SCHEMATIC
    NOTE: CONDITION OF OVEN
    1. DOOR CLOSED
    2. CLOCK APPEARS ON DISPLAY
    SCHEMATIC
    NOTE: CONDITION OF OVEN
    1. DOOR CLOSED
    2. COOKING TIME PROGRAMMED
    3. VARIABLE COOKING CONTROL P-HI (100%)
    4. START PAD TOUCHED
    Figure O-2. Oven Schematic-Cooking Condition
    NOTE:     indicates components with potential above 250V.
    120V AC
    60 Hz
    OVEN
    LAMP
    OVEN LAMP
    RELAY
    TURN-
    TABLE
    MOTORFAN 
    MOTORPOWER 
    TRANSFORMERMONITOR 
    SWITCH
    RECTIFIER
    MAGNETRON
    SECONDARY
    INTERLOCK
    SWITCHTTMOL
    FM
    C/T FUSEOR
    N.O.
    N.O.COM.
    COM.
    DOOR
    SENSING
    SWITCH
    (RY1)(RY2)
    CONTROL UNITPRIMARY
    INTERLOCK
    RELAY
    GRNB2CAPACITOR
    0.94µF
    AC 2200V B1
    120V AC
    60 Hz
    OVEN
    LAMP
    OVEN LAMP
    RELAY
    TURN-
    TABLE
    MOTORFAN 
    MOTORPOWER 
    TRANSFORMERMONITOR 
    SWITCH
    RECTIFIER
    MAGNETRON
    SECONDARY
    INTERLOCK
    SWITCHTTMOL
    FM
    C/T FUSE
    N.O.
    N.O.COM.
    COM.
    DOOR
    SENSING
    SWITCH
    (RY1)(RY2)
    CONTROL UNITPRIMARY
    INTERLOCK
    RELAY
    GRNB2CAPACITOR
    0.94µF
    AC 2200V B1
    OR 
    						
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    8
    DESCRIPTION AND FUNCTION OF COMPONENTS
    DOOR OPEN MECHANISM
    The door is opened by pushing the open button on the control
    panel, refer to the Figure D-1.
    When the open button is pushed, the open button pushes up
    the switch lever, and then the switch lever pushes up the latch
    head. The latch heads are moved upward and released from
    latch hook. Now the door will open.
    Figure D-1. Door Open Mechanism
    DOOR SENSING AND SECONDARY INTERLOCK
    SWITCHES
    The secondary interlock switch is mounted in the lower position
    of the latch hook and the door sensing switch in the primary
    interlock system is mounted in the upper position of the latch
    hook. They are activated by the latch heads on the door. When
    the door is opened, the switches interrupt the power to all high
    voltage components. 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.
    MONITOR SWITCH
    The monitor switch is activated (the contacts opened) by the
    latch head on the door while the door is closed. The switch is
    intended to render the oven inoperative, by means of blowing
    the C/T fuse, when the contacts of the primary interlock relay
    (RY2) and secondary interlock switch fail to open when the
    door is opened.
    Functions:
    1.When the door is opened, the monitor switch contacts close
    (to the ON condition) due to their being normally closed. At
    this time the primary interlock relay (RY2) and secondary
    interlock switch are in the OFF condition (contacts open)
    due to its 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 secondary interlock switch contacts close.
    3. If the door is opened, and the primary interlock relay (RY2)
    and the secondary interlock switch contact fail to open, the
    C/T fuse blows simultaneously with closing of the monitor
    switch contacts.
    CAUTION:BEFORE REPLACING A BLOWN C/T FUSE,
    TEST THE DOOR SENSING SWITCH, PRIMARYINTERLOCK RELAY (RY2), SECONDARY IN-
    TERLOCK SWITCH AND MONITOR SWITCH
    FOR PROPER OPERATION. (REFER TO CHAP-
    TER TEST PROCEDURE).
    NOTE:C/T FUSE AND MONITOR SWITCH ARE
    REPLACED AS AN ASSEMBLY.
    TURNTABLE MOTOR
    The turntable motor rotates the turntable located on the bottom
    of the oven cavity, so that the food on the turntable is cooked
    evenly. The turntable may turn in either direction.
    COOLING FAN MOTOR
    The cooling 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 vapours given off
    from the heating foods. It is then exhausted through the
    exhausting air vents at the oven cavity.
    TEMPERATURE FUSE (OVEN)
    The temperature fuse, located on the top of the oven cavity, is
    designed to prevent damage to the oven by fire. If the food load
    is overcooked, by either error in cook time or defect in the
    control unit, the temperature fuse will open.
    Under normal operation, the temperature fuse remains closed.
    However, when abnormally high temperatures are reached
    within the oven cavity, the temperature fuse will open at
    302˚F(150˚C), causing the oven to shut down.
    THERMAL CUT-OUT (OVEN)
    The thermal cut-out, located on the top of the oven cavity, is
    designed to prevent damage to the oven by fire. If the food load
    is overcooked, by either error in cook time or defect in the
    control unit, the thermal cut-out will open.
    Under normal operation, the oven thermal cut-out remains
    closed. However, when abnormally high temperatures are
    reached within the oven cavity, the oven thermal cut-out will
    open at 293˚F(145˚C), causing the oven to shut down.
    C/T FUSE
     1.The C/T fuse blows when the contacts (COM-NO) of the
    primary interlock relay (RY2) and secondary interlock switch
    remain closed with the oven door open and when the
    monitor switch closes.
    2.If the wire harness or electrical components are short-
    circuited, this C/T fuse blows  to prevent an electric shock
    or fire hazard.
    3. The C/T fuse, located near the magnetron, 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., the C/
    T fuse will open.
    Under normal operation, the C/T fuse remains closed. How-
    ever, when abnormally high temperatures are reached within
    the oven cavity, the C/T fuse will open at 302˚F (150˚C),
    causing the oven to shut down or when the electric currents
    beyond 20A flow, the C/T fuse will open.
    Latch 
    HeadsDoor
    Switch Lever
    Latch Hook
    Door Sensing
    Switch
    Monitor Switch
    Secondary
    Interlock Switch 
    						
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