Refer to the service manual in the GSPN(see rear cover) for the more information. 1. Precaution 2. Product Specification 3. Disassembly and Reassembly 4. Troubleshooting 5. Exploded Views and Part List 6. PCB Diagrams 7. Wiring Diagrams 8. Schematic Diagrams BASIC: SMH8165B MODEL: SMH8165W MODEL CODE: SMH8165W/XAC Version: 00,01
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Transcript
Refer to the service manual in the GSPN(see rear cover) for the more information.
1. Precaution2. ProductSpecification3. Disassembly and Reassembly4. Troubleshooting5. Exploded Views and Part List6. PCB Diagrams7. Wiring Diagrams8. Schematic Diagrams
Follow these special safety precautions . Although the microwave oven is completely safe during ordinary use, repair work can be extremely hazardous due to possible exposure to microwave radiation, as well as potentially lethal high voltages and currents .
1-1 Safety precautions ( )1. All repairs should be done in accordance with the
procedures described in this manual . This product complies with Federal Performance Standard 21 CFR
�. Microwave emission check should be performed to prior to servicing if the oven is operative .
3. If the oven operates with the door open :Instruct the user not to operate the oven and contact the manufacturer and the center for devices and radiological health immediately .
4. Notify the Central Service Center if the microwave leakage exceeds 5 mW/cm2 .
5. Check all grounds .6. Do not power the MWO from a “2-prong” AC cord .
Be sure that all of the built-in protective devices are replaced . Restore any missing protective shields .
7. When reinstalling the chassis and its assemblies, be sure to restore all protective devices, including: nonmetallic control knobs and compartment covers .
8. Make sure that there are no cabinet openings through which people --particularly children--might insert objects and contact dangerous voltages . Examples: Lamp hole,ventilation slots .
9. Inform the manufacturer of any oven foundto have emission in excess of 5 mW/cm2 ,Make repairs to bring the unit into compliance at no cost to owner and try to determine cause . Instruct owner not to use oven until it has been brought into compliance .
CENTRAL SERVICE CENTER10. Service technicians should remove their watches
while repairing an MWO .11. To avoid any possible radiation hazard,replace parts
in accordance with the wiring diagram . Also, use only the exact replacements for the following parts: Primary and secondary interlock switches, interlock monitor switch .
1�. If the fuse is blown by the Interlock Monitor Switch: Replace all of the following at the same time: Primary, door sensing switch and power relay, as well as the Interlock Monitor Switch . The correct adjustment of these switches is described elsewhere in this manual . Make sure that the fuse has the correct rating for the particular model being repaired .
13. Design Alteration Warning: Use exact replacement parts only, i.e.,only those that are specified in thedrawings and parts lists of this manual . This is especially important for the Interlock switches, described above . Never alter or add to the mechanical or electrical design of the MWO . Any design changes or additions will void the manufacturer’s warranty . Always unplug the unit’s AC power cord from the AC power source before attempting to remove or reinstall any component or assembly .
14. Never defeat any of the B+ voltage interlocks . Do not apply AC power to the unit (or any of its assemblies) unless all solid-state heat sinks are correctly installed .
15. Some semiconductor (“solid state”) devices are easily damaged by static electricity . Such components are called Electrostatically Sensitive Devices (ESDs) . Examples include integrated circuits and field-effect transistors. Immediately before handling any semiconductor components or assemblies, drain the electrostatic charge from your body by touching a known earth ground .
16. Always connect a test instrument’s ground lead to the instrument chassis ground before connecting the positive lead; always remove the instrument’s ground lead last .
17. When checking the continuity of the witches or transformer, always make sure that the power is OFF, and one of the lead wires is disconnected .
18. Components that are critical for safety are indicated in the circuit diagram by shading, or .
19. Use replacement components that have the same ratings, especially for flame resistance and dielectric strength specifications. A replacement part that does not have the same safety characteristics as the original might create shock, fire or other hazards.
NOTE : Connect the oven to a 20A . When connecting the oven to a 15A,make sure that circuit breaker can operate .
5
1. Precaution
1-� Special High Voltage Precautions
1. High Voltage Warning Do not attempt to measure any of the high voltages --this includes the filament voltage of the magnetron . High voltage is present during any cook cycle . Before touching any components or wiring, always unplug the oven and discharge the high voltage capacitor (See Figure 1-1)
�. The high-voltage capacitor remains charged about 30 seconds after disconnection . Short the negative terminal of the high-voltage capacitor to to the oven chassis . (Use a screwdriver .)
3. High voltage is maintained within specified limits by close-tolerance, safety-related components and adjustments . If the high voltage exceeds the specified limits, check each of the special components .
H . V . Diode
Short
H . V . Capacitor
PRECAUTIONThere exists HIGH VOLTAGE ELECTRICITY with high current capabilities in the circuits of the HIGH VOLTAGE TRANSFORMER secondary and filament terminals. It is extremely dangerous to work on or near these circuits with the oven energized . DO NOT measure the voltage in the high voltage circuit including filament voltage of magnetron.
PRECAUTIONServicemen should remove their watches whenever working close to or replacing the magnetron .
PRECAUTIONNever touch any circuit wiring with your hand nor with uninsulated tool during operation .
6
2.Specifications
�-1 Features
Product Features
• Stirrer and Turntable Continually rotates food to ensure even cooking.
• Instant Cook Instant On Controls - Allow quick, one touch cooking and reheating.
• Venting System Two speed, 300CFM venting system - Quickly removes smokr and steam from cook top
�-� Accessory
Item Description Code No. Q’ty
GLASS TRAY DE74-20016A 1
ROLLER GUIDE RING DE92-90495A 1
EXHAUST ADAPTOR DE92-90242D 1
HARDWARE-KIT DE92-90505E 1
GREASE FILTER DE63-00196B 1
CHARCOAL FILTER DE63-00367A 1
RACK-WIRE DE75-00032A 1
7
2.Specifications
2-3TableofSpecifications
ItemsBasic Model New Model
SMH8165B/XAC (00,01) SMH8165W/XAC (00,01)Cavity Size (cu .ft .) 1 .6 1 .6PowerPower Source 120 V / 60 Hz 120 V / 60 HzOutput Power (Watts) 950 950Power Consumption (Watts/Amp) 1500 1500CharacteristicsControl Method Touch TouchDisplay VFD 1LINE VFD 1LINESensor Yes YesCooking Timer 99 min . 99 sec . 99 min . 99 sec .Power Level 10 10Auto Defrost Yes YesAuto Reheat Yes YesOne Touch Instant Cook Pads Yes YesHandy Helper Yes YesKids’ Meals Yes YesSnack bar Yes YesMore/Less Yes YesCooking Stages 3 3One Minute Plus Yes YesClock Yes YesKitchen Timer Yes YesWeight Option Kg KgReminder End Signal On/Off No NoChild Safety Lock No NoClock System Option (12 hrs / 24 hrs) 12 hrs 12 hrsDemonstration Mode No NoNumeric Pads 0-9 0-9Turntable Distribution Stirrer + Turntable Stirrer + TurntableTurntable On/Off No NoEnd Signal Sound Yes YesVent Fan CFM 300 300Vent Orientation Vertical VerticalVent Fan Control Hi/Lo/Off Hi/Lo/OffCooktop Lighting Hi/Lo/Off Hi/Lo/Off
Cabinet Colour STSS/Black/White STSS/Black/WhiteCavity Interior Epoxy EpoxyCabinet Dimensions W x H x D (inches) 29 7/8 x 16 1/2 x 15 1/16 29 7/8 x 16 1/2 x 15 1/16
Shipping PropertiesShipping Dimensions W x H x D (inches) 33 3/8 x 19 15/16 x 19 13/32 33 3/8 x 19 15/16 x 19 13/32Loading Q’ty (sets / 40ft) 330 (Jumbo) 330 (Jumbo)Shipping Weight (lb) 60 .2 lbs 60 .2 lbs
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3. Disassembly and Reassembly
MAGNETRON, MOTOR ASSEMBLY, VENT BLOWER AND HIGH VOLTAGE TRANSFORMEROven must be removed from wall.REMOVING OVEN FROM WALL (� PEOPLE REQUIRED)Oven is hooked on metal tabs at bottom of wall mounting plate and to cabinet by (3) top cabinet bolts .
3-1 Replacement of High Voltage Transformer
Parts Explaination Photo Explaination
Grille
1. Disconnect oven power .
�. Remove Grille . 1) Remove 2 screws �) Slide the Grille to the left, then pull it
straght out .
Panel Outer 3. Remove Panel Outer .
9
3. Disassembly and Reassembly
3-1 Replacement of High Voltage Transformer
Parts Explaination Photo Explaination
High voltage capacitor
4. Discharge the High voltage capacitor .
5. Disconnect all the leads .
Base Bottom
6. Remove Base bottom .
HV Trans 7. Take out the HV Trans .
10
3. Disassembly and Reassembly
3-� Replacement of Magnetron
Parts Explaination Photo Explaination
Magnetron
Remove the magnetron including the shield case, permanent magnet, choke coils and capacitors (all of which are contained in one assembly) .1. Disconnect all lead wires from the
magnetron .
�. Remove nuts (4) securing the magnetron to the wave guide .
3. Take out the magnetron very carefully .
NOTE1: When removing the magnetron, make sure that it antenna does not hit any adjacentparts, or it may be damaged .
NOTE�: When replacing the magnetron, be sure to remount the magnetron gasket in the correct position and make sure the gasket is in good condition .
PRECAUTIONDuring replacement, be certain R .F . anode gasket is in place around anode stub .PERFORM MICROWAVE LEAKAGE TEST
11
3. Disassembly and Reassembly
3-3 Replacement of Door AssemblyParts Disassembly Photo Explaination
Removal of Door Assembly
1. Insert flat screwdriver into the gap between Door “A” and Door “C” to remove Door “C” . Be careful when handling Door “C” because it is fragile .Then remove the door assembly .
Removal of Door C
�. Insert flat screwdriver into the gap between Door “A” and Door “C” to remove Door “C” .
• Becareful when handling Door “C” because it is fragile .
Removal of Key Door & Spring 3. Detach the spring and key door from Door .
1�
3. Disassembly and Reassembly
Removal of Handle
4. Remove 2 screws, then handle is detached from Door “A” .
Removal of Door “E”
5. Following the procedure as shown in the figure, insert and bend a thin metal plate between Door “E” and Door “A” until you hear the ‘tick’ sound .
• Insertion depth of the thin metal plate should be 0 .5mm or less .
PRECAUTIONPERFORM MICROWAVE LEAKAGE TEST
3-3 Replacement of Door Assembly
13
3. Disassembly and Reassembly
3-4 Replacement of Fuse
Parts Explaination Photo Explaination
Fuse
The fuse is located on the noise filter.1. Disconnect power and remove grille .�. Replace the fuse .3. When 20A fuse blows out by the operation
of interlock monitor switch failure, replace the primary interlock switch, secondary interlock switch, door sensing switch, interlock monitor switch and power relay .
4. When the above four switches operate properly, check if any other part such as the control circuit board, blower motor or high voltage transformer is defective .
3-5 Replacement of Drive Motor
Parts Explaination Photo Explaination
Drive Motor
1. Disconnect power and remove bottom plate screws(5) .
�. Remove bottom plate and disconnect the turntable motor drive .
3. Remove turntable motor screws(1) and pull the turntable motor out .
4. When replacing the drive motor, be sure to remount it in the correct position with the coupler .
5. Connect all the leads to the drive motor .
Fuse
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3. Disassembly and Reassembly
3-6 Replacement of stirrer motor
Parts Explaination Photo Explaination
Stirrer Motor
1. Disconnect power and remove Grille screws(3) .
�. Remove the bracket duct upper .
3. Disconnect the stirrer motor wire .
4. Remove stirrer motor screws(2) and pull the stirrer motor .
15
3. Disassembly and Reassembly
3-7 Removal of stirrer
Parts Explaination Photo Explaination
Stirrer
The stirrer is motor driver and located on the upper side of the cavity . The oven uses a top feed wave guide . The stirrer is located in the wave guide and the motor is located on the wave guide .
1. Disconnect power and open the door .
�. Remove the clip and turn the stirrer cover left .
3. Remove stirrer cover and the stirrer will come with it .
16
3. Disassembly and Reassembly
3-8 Replacement of Control Circuit BoardParts Explaination Photo Explaination
Removal of Control Box Assembly
1. Disconnect power and remove grille .
�. Be sure to ground any static electric charge in your body and never touch the control circuit .
3. Remove a screw securing the control box assembly .
4. Disconnect the connectors from the control circuit board .
Removal of P .C .B Assembly
1. Pull the lever end of the plastic fastener and remove the Flexible Printed Circuit(FPC) of membrane panel .
�. Remove screws (4) securing the control circuit board .
3. Lift up the control circuit board from the Ass’y control box .
4. When reconnecting the FPC connector, make sure that the holes on the connector are properly engaged with the hooks on the Plastic Fastener .
17
3. Disassembly and Reassembly
3-9 Replacement of Cooktop lampWhen replacing the night light, make sure that you are wearing gloves to avoid injury from the heat of the bulb .
Parts Explaination Photo Explaination
Cooktop Lamp
1. Unplug the oven or turn off the power at the main power .
�. Remove the bulb cover, and mounting screws .
3. Replace the bulb with a 40 watt appliance bulb .
4. Replace the bulb cover and mounting screws .
5. Turn the power back on at the main power supply .
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3. Disassembly and Reassembly
3-10 Replacement of Oven LightParts Explaination Photo Explaination
Oven Light
1. Remove the Grille
�. Remove the bracket Duct upper by remove 1 screw .
3. Replace the bulb with a 40 watt appliance bulb .
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4. Troubleshooting
4-1 Error Code Numbering Rule1. ERROR CODE NUMBERING RULE is applied to a microwave oven and an oven .(CMO, OTR, Grill, Convection,
Commercial etc .)�. All sensors and devices have their own number . ex) Gas Sensor = 1, Temp . Sensor = 2, . . .3. Of each device, No .1 and No .2 refer to “Open Error” (not sensed) and “Short Error”, respectively .4. This numbering rule has been applied to models to have been developed since January, 1, 2005 . (But, GE or
Error Code Others (E-0X, Letter) Solution Page-SE- Key Short Error (10 seconds) Turn off set and restart . 20 Page
Error Code Gas Sensor Error Case (E-1X) Solution PageE-11 Open
Check Sensor part ,connection of sensor housing and PCB’s connector .
21 PageE-12 Short 22 PageE-13 T1 Max Time Error
23 PageE-14 Dry Up / No Load Insert food and restart .
4. Troubleshooting
�0
4. Troubleshooting
YES
NO
YES
NO
NO
YES
YES
NO
“- SE -” is displayed.
Perform the operation again and check if it is working properly.
S/W Error
Is a specific keynot recognized?
Is the key recognizedintermittently?
The membrane is defective.
Replace the Control Panel.
Is the key not recognizedat all?
After Power > On,does the symptom continue?
Replace the PCB.
4-3 Electrical Malfunction4-3-1 -SE-
�1
4. Troubleshooting
YES
NO
NO
YES
NO
YES
NO
Sensor Open Error (E-11)
Perform the operation again and check if it is working properly.
: Check if the sensor housing is inserted into the connector of the main PCB.
The sensor is out of order.
Is the sensor disconnected?
Is the sensor wireconnected properly?
Does the voltage changeas the humidity, temperature
and weight change?
Replace the sensor.
: Check if the sensor wire is damaged, if the housing is loose and if the sensor and the wire are properly connected.
: Check if the voltage of the GND and sensor changes using a digital multi-meter by forcefully changing the humidity, temperature and weight.
Connect the sensor.
Connect the wire properly.
S/W Error
After Power -> On, does the symptom continue?
Replace the PCB.
sensor
housing
connector
4-3-� E-11
��
4. Troubleshooting
: Check if both terminals of the sensor are slightly shorted.
Does the voltage changeas the humidity, temperature
and weight cha
Is the sensor terminal part of the PCB shorted?
: Check if the voltage of the GND and sensor changes using a digital multi-meter by forcefully changing the humidity, temperature and weight.
: Check if the sensor and related parts such as the connector or soldering parts are slightly shorted.
Remove the shorted partof the temperature sensor.
Remove any foreignSubstance from the
shorted part.
YES
NO
YES
YES
NO
NO
YES
NO
Sensor Short Error (E-12)
Is the sensor shorted?
The sensor is out of order.
Replace the sensor.
Perform the operation again and check if it is working properly.
S/W Error
After Power > On, does the symptom continue?
Replace the PCB.
sensor
sensorterminal
connector
4-3-3 E-1�
�3
4. Troubleshooting
YES
NO
YES
NO
NO
YES
Sensor Max Time Error (E-13, E-14)
Perform the operation again and check if it is working properly.
: Since heating without placing food into the oven may damage the product, take care.
The sensor is out of order.
Is any foreign substanceon the sensor or is something acting as an
obstacle in front of the sensor?
Does it heat with completelydried food?
Replace the sensor.
: If the sensor is contaminated by a foreign substance, it may fail to detect the humidity.
: Since heating completely dried food may burn the food, take care.
Insert foodand heat it again.
Place food withmoisture into it and
heat it again.
Remove the anforeign substance
or obstacle.
Does it heat up withoutplacing food into it?
4-3-4 E-13, E-14
�4
4. Troubleshooting
PRECAUTION1. CHECK GROUNDING BEFORE CHECKING FOR TROUBLE .�. BE CAREFUL OF THE HIGH VOLTAGE CIRCUIT .3. DISCHARGE THE HIGH VOLTAGE CAPACITOR .4. WHEN CHECKING THE CONTINUITY OF THE SWITCHES OR TRANSFORMER, DISCONNECT ONE
LEAD WIRE FROM THESE PARTS AND THEN CHECK CONTINUITY WITHOUT THE POWER SOURCE ON . TO DO OTHERWISE MAY RESULT IN A FALSE READING OR DAMAGE TO YOUR METER .
5. DO NOT TOUCH ANY PART OF THE CIRCUIT OR THE CONTROL CIRCUIT BOARD, SINCE STATIC DISCHARGE MAY DAMAGE IT . ALWAYS TOUCH GROUND WHILE WORKING ON IT TO DISCHARGE ANY STATIC CHARGE BUILT UP .
4-4 Electrical Malfunction
Oven is dead . (No display and no operation at all .)
Fuse is OKOpen or loose lead wire harness
Open thermal cutout (Magnetron)
Open low voltage transformer
Check fan motor when thermal cutout is defective.
Check Ass’y PCB when L.V.T is defective.
Check adjustment of primary, interlock monitor, power relay, door sensing switch.
NOTE 1: All of these switches must be replaced at the same time. (refer to adjustment instructions) Check continuity of power relay contacts and if it has continuity, replace power relay also.
NOTE: Large contact resistance will bring lower magnetron filament voltage and cause magnetron to lower output and/or intermittent oscillation.
NOTE 2: When H.V.Transformer is replaced, check diode and magnetron also.
Defective Ass’y PCB
Shorted lead wire harness
Defective primary latch switch (NOTE 1)
Defective monitor switch (NOTE 1)
Shorted H.V.Capacitor
Shorted H.V.Transformer (NOTE 2)
Oven does not accept key input
Key input is not in-Sequence
Open or loose connection of membrane key pad to Ass’y PCB
Shorted or open membrane panel
Refer to operation procedure.
Replace PCB main.Defective Ass’y PCB
Timer starts countdown but no microwave
oscillation
Off-alignment of latch switches
Open or loose connection of high voltage circuit especially magnetron filament circuit (NOTE)
Defective high voltage components H.V.Transformer H.V. Capacitor H.V.Diode, H.V.Fuse Magnetron
Adjust door and latch switches.
Check high voltage component according tocomponent test procedure and replace if it isdefective.
Open or loose wiring of power relay
Replace PCB main.
Defective primary latch switch
Defective power relay or Ass’y PCB
Oven does not accept key input (Program)
Fuse is OKOpen or loose lead wire harness
Open thermal cutout (Magnetron)
Open low voltage transformer
Check fan motor when thermal cutout is defective.
Check Ass’y PCB when L.V.T is defective.
Check adjustment of primary, interlock monitor, power relay, door sensing switch.
NOTE 1: All of these switches must be replaced at the same time. (refer to adjustment instructions) Check continuity of power relay contacts and if it has continuity, replace power relay also.
NOTE: Large contact resistance will bring lower magnetron filament voltage and cause magnetron to lower output and/or intermittent oscillation.
NOTE 2: When H.V.Transformer is replaced, check diode and magnetron also.
Defective Ass’y PCB
Shorted lead wire harness
Defective primary latch switch (NOTE 1)
Defective monitor switch (NOTE 1)
Shorted H.V.Capacitor
Shorted H.V.Transformer (NOTE 2)
Oven does not accept key input
Key input is not in-Sequence
Open or loose connection of membrane key pad to Ass’y PCB
Shorted or open membrane panel
Refer to operation procedure.
Replace PCB main.Defective Ass’y PCB
Timer starts countdown but no microwave
oscillation
Off-alignment of latch switches
Open or loose connection of high voltage circuit especially magnetron filament circuit (NOTE)
Defective high voltage components H.V.Transformer H.V. Capacitor H.V.Diode, H.V.Fuse Magnetron
Adjust door and latch switches.
Check high voltage component according tocomponent test procedure and replace if it isdefective.
Open or loose wiring of power relay
Replace PCB main.
Defective primary latch switch
Defective power relay or Ass’y PCB
�5
4. Troubleshooting
Timer starts countdown but no microwave oscillation .(No heat while oven lamp and fan motor turn on.)
Fuse is OKOpen or loose lead wire harness
Open thermal cutout (Magnetron)
Open low voltage transformer
Check fan motor when thermal cutout is defective.
Check Ass’y PCB when L.V.T is defective.
Check adjustment of primary, interlock monitor, power relay, door sensing switch.
NOTE 1: All of these switches must be replaced at the same time. (refer to adjustment instructions) Check continuity of power relay contacts and if it has continuity, replace power relay also.
NOTE: Large contact resistance will bring lower magnetron filament voltage and cause magnetron to lower output and/or intermittent oscillation.
NOTE 2: When H.V.Transformer is replaced, check diode and magnetron also.
Defective Ass’y PCB
Shorted lead wire harness
Defective primary latch switch (NOTE 1)
Defective monitor switch (NOTE 1)
Shorted H.V.Capacitor
Shorted H.V.Transformer (NOTE 2)
Oven does not accept key input
Key input is not in-Sequence
Open or loose connection of membrane key pad to Ass’y PCB
Shorted or open membrane panel
Refer to operation procedure.
Replace PCB main.Defective Ass’y PCB
Timer starts countdown but no microwave
oscillation
Off-alignment of latch switches
Open or loose connection of high voltage circuit especially magnetron filament circuit (NOTE)
Defective high voltage components H.V.Transformer H.V. Capacitor H.V.Diode, H.V.Fuse Magnetron
Adjust door and latch switches.
Check high voltage component according tocomponent test procedure and replace if it isdefective.
Open or loose wiring of power relay
Replace PCB main.
Defective primary latch switch
Defective power relay or Ass’y PCB
Oven can program but timer does not start .
Oven can program but timer does
not start
Open or loose wiring of secondary interlock switch
Adjust door and interlock switches.
Off-alignment of primary interlock
Defective secondary interlock S/W
Turntable motor doesnot rotate.
Open or loose wiring of turntable motor.
Replace turntable motor.
Defective turntable motor
Oven stops operation during cooking
Open or loose wiring of primary interlock switch
Adjust door and latch switches.
Operation of thermal cutout (Magnetron)
Sparks
Metallic ware or cooking dishes touching on the oven wall
Inform the customer: Do not use any type of cookware with metallic trimming
Ceramic ware trimmed with gold or silver powder also causes sparks
Loud buzzing noisecan be heard
Loose fan and fan motor Tighten screws of fan motor.
Tighten screws of H.V.Transformer.
Replace H.V.Diode.
Loose screws on H.V.Transformer
Shorted H.V.Diode
Microwave output is low
Decrease in power source voltage Consult electrician.
Open or loose wiring of magnetron filament circuit. (Intermittent oscillation)
Aging of magnetron
Fan motor turns on when plugged in Loose wiring of door sensing switch Consult electrician.
Oven does notoperate and return to
the plugged in mode
Defective Ass’y PCB Replace PCB main.
Noise from theturntable motor whenit starts to operate.
Noise may result from the motor Replace turntable motor.
Uneven cooking Uneven intensity of microwave due to its characteristics
Wrap thinner parts of the food with aluminum foil.
se plastic wrap or cover with a lid.
Stir once or twice while cooking foods such as soup, cocoa, or milk.
Microwave output is low . (Oven takes longer time to cook food .)
Oven can program but timer does
not start
Open or loose wiring of secondary interlock switch
Adjust door and interlock switches.
Off-alignment of primary interlock
Defective secondary interlock S/W
Turntable motor doesnot rotate.
Open or loose wiring of turntable motor.
Replace turntable motor.
Defective turntable motor
Oven stops operation during cooking
Open or loose wiring of primary interlock switch
Adjust door and latch switches.
Operation of thermal cutout (Magnetron)
Sparks
Metallic ware or cooking dishes touching on the oven wall
Inform the customer: Do not use any type of cookware with metallic trimming
Ceramic ware trimmed with gold or silver powder also causes sparks
Loud buzzing noisecan be heard
Loose fan and fan motor Tighten screws of fan motor.
Tighten screws of H.V.Transformer.
Replace H.V.Diode.
Loose screws on H.V.Transformer
Shorted H.V.Diode
Microwave output is low
Decrease in power source voltage Consult electrician.
Open or loose wiring of magnetron filament circuit. (Intermittent oscillation)
Aging of magnetron
Fan motor turns on when plugged in Loose wiring of door sensing switch Consult electrician.
Oven does notoperate and return to
the plugged in mode
Defective Ass’y PCB Replace PCB main.
Noise from theturntable motor whenit starts to operate.
Noise may result from the motor Replace turntable motor.
Uneven cooking Uneven intensity of microwave due to its characteristics
Wrap thinner parts of the food with aluminum foil.
se plastic wrap or cover with a lid.
Stir once or twice while cooking foods such as soup, cocoa, or milk.
Fan motor turns on when plugged in .
Oven can program but timer does
not start
Open or loose wiring of secondary interlock switch
Adjust door and interlock switches.
Off-alignment of primary interlock
Defective secondary interlock S/W
Turntable motor doesnot rotate.
Open or loose wiring of turntable motor.
Replace turntable motor.
Defective turntable motor
Oven stops operation during cooking
Open or loose wiring of primary interlock switch
Adjust door and latch switches.
Operation of thermal cutout (Magnetron)
Sparks
Metallic ware or cooking dishes touching on the oven wall
Inform the customer: Do not use any type of cookware with metallic trimming
Ceramic ware trimmed with gold or silver powder also causes sparks
Loud buzzing noisecan be heard
Loose fan and fan motor Tighten screws of fan motor.
Tighten screws of H.V.Transformer.
Replace H.V.Diode.
Loose screws on H.V.Transformer
Shorted H.V.Diode
Microwave output is low
Decrease in power source voltage Consult electrician.
Open or loose wiring of magnetron filament circuit. (Intermittent oscillation)
Aging of magnetron
Fan motor turns on when plugged in Loose wiring of door sensing switch Consult electrician.
Oven does notoperate and return to
the plugged in mode
Defective Ass’y PCB Replace PCB main.
Noise from theturntable motor whenit starts to operate.
Noise may result from the motor Replace turntable motor.
Uneven cooking Uneven intensity of microwave due to its characteristics
Wrap thinner parts of the food with aluminum foil.
se plastic wrap or cover with a lid.
Stir once or twice while cooking foods such as soup, cocoa, or milk.
Oven does not operate and return to the plugged in mode .
Oven can program but timer does
not start
Open or loose wiring of secondary interlock switch
Adjust door and interlock switches.
Off-alignment of primary interlock
Defective secondary interlock S/W
Turntable motor doesnot rotate.
Open or loose wiring of turntable motor.
Replace turntable motor.
Defective turntable motor
Oven stops operation during cooking
Open or loose wiring of primary interlock switch
Adjust door and latch switches.
Operation of thermal cutout (Magnetron)
Sparks
Metallic ware or cooking dishes touching on the oven wall
Inform the customer: Do not use any type of cookware with metallic trimming
Ceramic ware trimmed with gold or silver powder also causes sparks
Loud buzzing noisecan be heard
Loose fan and fan motor Tighten screws of fan motor.
Tighten screws of H.V.Transformer.
Replace H.V.Diode.
Loose screws on H.V.Transformer
Shorted H.V.Diode
Microwave output is low
Decrease in power source voltage Consult electrician.
Open or loose wiring of magnetron filament circuit. (Intermittent oscillation)
Aging of magnetron
Fan motor turns on when plugged in Loose wiring of door sensing switch Consult electrician.
Oven does notoperate and return to
the plugged in mode
Defective Ass’y PCB Replace PCB main.
Noise from theturntable motor whenit starts to operate.
Noise may result from the motor Replace turntable motor.
Uneven cooking Uneven intensity of microwave due to its characteristics
Wrap thinner parts of the food with aluminum foil.
se plastic wrap or cover with a lid.
Stir once or twice while cooking foods such as soup, cocoa, or milk.
�6
4. Troubleshooting
Loud buzzing noise can be heard .
Oven can program but timer does
not start
Open or loose wiring of secondary interlock switch
Adjust door and interlock switches.
Off-alignment of primary interlock
Defective secondary interlock S/W
Turntable motor doesnot rotate.
Open or loose wiring of turntable motor.
Replace turntable motor.
Defective turntable motor
Oven stops operation during cooking
Open or loose wiring of primary interlock switch
Adjust door and latch switches.
Operation of thermal cutout (Magnetron)
Sparks
Metallic ware or cooking dishes touching on the oven wall
Inform the customer: Do not use any type of cookware with metallic trimming
Ceramic ware trimmed with gold or silver powder also causes sparks
Loud buzzing noisecan be heard
Loose fan and fan motor Tighten screws of fan motor.
Tighten screws of H.V.Transformer.
Replace H.V.Diode.
Loose screws on H.V.Transformer
Shorted H.V.Diode
Microwave output is low
Decrease in power source voltage Consult electrician.
Open or loose wiring of magnetron filament circuit. (Intermittent oscillation)
Aging of magnetron
Fan motor turns on when plugged in Loose wiring of door sensing switch Consult electrician.
Oven does notoperate and return to
the plugged in mode
Defective Ass’y PCB Replace PCB main.
Noise from theturntable motor whenit starts to operate.
Noise may result from the motor Replace turntable motor.
Uneven cooking Uneven intensity of microwave due to its characteristics
Wrap thinner parts of the food with aluminum foil.
se plastic wrap or cover with a lid.
Stir once or twice while cooking foods such as soup, cocoa, or milk.
Turntable motor does not rotate .
Oven can program but timer does
not start
Open or loose wiring of secondary interlock switch
Adjust door and interlock switches.
Off-alignment of primary interlock
Defective secondary interlock S/W
Turntable motor doesnot rotate.
Open or loose wiring of turntable motor.
Replace turntable motor.
Defective turntable motor
Oven stops operation during cooking
Open or loose wiring of primary interlock switch
Adjust door and latch switches.
Operation of thermal cutout (Magnetron)
Sparks
Metallic ware or cooking dishes touching on the oven wall
Inform the customer: Do not use any type of cookware with metallic trimming
Ceramic ware trimmed with gold or silver powder also causes sparks
Loud buzzing noisecan be heard
Loose fan and fan motor Tighten screws of fan motor.
Tighten screws of H.V.Transformer.
Replace H.V.Diode.
Loose screws on H.V.Transformer
Shorted H.V.Diode
Microwave output is low
Decrease in power source voltage Consult electrician.
Open or loose wiring of magnetron filament circuit. (Intermittent oscillation)
Aging of magnetron
Fan motor turns on when plugged in Loose wiring of door sensing switch Consult electrician.
Oven does notoperate and return to
the plugged in mode
Defective Ass’y PCB Replace PCB main.
Noise from theturntable motor whenit starts to operate.
Noise may result from the motor Replace turntable motor.
Uneven cooking Uneven intensity of microwave due to its characteristics
Wrap thinner parts of the food with aluminum foil.
se plastic wrap or cover with a lid.
Stir once or twice while cooking foods such as soup, cocoa, or milk.
Oven stops operation during cooking .
Oven can program but timer does
not start
Open or loose wiring of secondary interlock switch
Adjust door and interlock switches.
Off-alignment of primary interlock
Defective secondary interlock S/W
Turntable motor doesnot rotate.
Open or loose wiring of turntable motor.
Replace turntable motor.
Defective turntable motor
Oven stops operation during cooking
Open or loose wiring of primary interlock switch
Adjust door and latch switches.
Operation of thermal cutout (Magnetron)
Sparks
Metallic ware or cooking dishes touching on the oven wall
Inform the customer: Do not use any type of cookware with metallic trimming
Ceramic ware trimmed with gold or silver powder also causes sparks
Loud buzzing noisecan be heard
Loose fan and fan motor Tighten screws of fan motor.
Tighten screws of H.V.Transformer.
Replace H.V.Diode.
Loose screws on H.V.Transformer
Shorted H.V.Diode
Microwave output is low
Decrease in power source voltage Consult electrician.
Open or loose wiring of magnetron filament circuit. (Intermittent oscillation)
Aging of magnetron
Fan motor turns on when plugged in Loose wiring of door sensing switch Consult electrician.
Oven does notoperate and return to
the plugged in mode
Defective Ass’y PCB Replace PCB main.
Noise from theturntable motor whenit starts to operate.
Noise may result from the motor Replace turntable motor.
Uneven cooking Uneven intensity of microwave due to its characteristics
Wrap thinner parts of the food with aluminum foil.
se plastic wrap or cover with a lid.
Stir once or twice while cooking foods such as soup, cocoa, or milk.
Sparks .
Oven can program but timer does
not start
Open or loose wiring of secondary interlock switch
Adjust door and interlock switches.
Off-alignment of primary interlock
Defective secondary interlock S/W
Turntable motor doesnot rotate.
Open or loose wiring of turntable motor.
Replace turntable motor.
Defective turntable motor
Oven stops operation during cooking
Open or loose wiring of primary interlock switch
Adjust door and latch switches.
Operation of thermal cutout (Magnetron)
Sparks
Metallic ware or cooking dishes touching on the oven wall
Inform the customer: Do not use any type of cookware with metallic trimming
Ceramic ware trimmed with gold or silver powder also causes sparks
Loud buzzing noisecan be heard
Loose fan and fan motor Tighten screws of fan motor.
Tighten screws of H.V.Transformer.
Replace H.V.Diode.
Loose screws on H.V.Transformer
Shorted H.V.Diode
Microwave output is low
Decrease in power source voltage Consult electrician.
Open or loose wiring of magnetron filament circuit. (Intermittent oscillation)
Aging of magnetron
Fan motor turns on when plugged in Loose wiring of door sensing switch Consult electrician.
Oven does notoperate and return to
the plugged in mode
Defective Ass’y PCB Replace PCB main.
Noise from theturntable motor whenit starts to operate.
Noise may result from the motor Replace turntable motor.
Uneven cooking Uneven intensity of microwave due to its characteristics
Wrap thinner parts of the food with aluminum foil.
se plastic wrap or cover with a lid.
Stir once or twice while cooking foods such as soup, cocoa, or milk.
Uneven cooking .
Oven can program but timer does
not start
Open or loose wiring of secondary interlock switch
Adjust door and interlock switches.
Off-alignment of primary interlock
Defective secondary interlock S/W
Turntable motor doesnot rotate.
Open or loose wiring of turntable motor.
Replace turntable motor.
Defective turntable motor
Oven stops operation during cooking
Open or loose wiring of primary interlock switch
Adjust door and latch switches.
Operation of thermal cutout (Magnetron)
Sparks
Metallic ware or cooking dishes touching on the oven wall
Inform the customer: Do not use any type of cookware with metallic trimming
Ceramic ware trimmed with gold or silver powder also causes sparks
Loud buzzing noisecan be heard
Loose fan and fan motor Tighten screws of fan motor.
Tighten screws of H.V.Transformer.
Replace H.V.Diode.
Loose screws on H.V.Transformer
Shorted H.V.Diode
Microwave output is low
Decrease in power source voltage Consult electrician.
Open or loose wiring of magnetron filament circuit. (Intermittent oscillation)
Aging of magnetron
Fan motor turns on when plugged in Loose wiring of door sensing switch Consult electrician.
Oven does notoperate and return to
the plugged in mode
Defective Ass’y PCB Replace PCB main.
Noise from theturntable motor whenit starts to operate.
Noise may result from the motor Replace turntable motor.
Uneven cooking Uneven intensity of microwave due to its characteristics
Wrap thinner parts of the food with aluminum foil.
se plastic wrap or cover with a lid.
Stir once or twice while cooking foods such as soup, cocoa, or milk.
Noise from the turntable motor when it starts to operate .
Oven can program but timer does
not start
Open or loose wiring of secondary interlock switch
Adjust door and interlock switches.
Off-alignment of primary interlock
Defective secondary interlock S/W
Turntable motor doesnot rotate.
Open or loose wiring of turntable motor.
Replace turntable motor.
Defective turntable motor
Oven stops operation during cooking
Open or loose wiring of primary interlock switch
Adjust door and latch switches.
Operation of thermal cutout (Magnetron)
Sparks
Metallic ware or cooking dishes touching on the oven wall
Inform the customer: Do not use any type of cookware with metallic trimming
Ceramic ware trimmed with gold or silver powder also causes sparks
Loud buzzing noisecan be heard
Loose fan and fan motor Tighten screws of fan motor.
Tighten screws of H.V.Transformer.
Replace H.V.Diode.
Loose screws on H.V.Transformer
Shorted H.V.Diode
Microwave output is low
Decrease in power source voltage Consult electrician.
Open or loose wiring of magnetron filament circuit. (Intermittent oscillation)
Aging of magnetron
Fan motor turns on when plugged in Loose wiring of door sensing switch Consult electrician.
Oven does notoperate and return to
the plugged in mode
Defective Ass’y PCB Replace PCB main.
Noise from theturntable motor whenit starts to operate.
Noise may result from the motor Replace turntable motor.
Uneven cooking Uneven intensity of microwave due to its characteristics
Wrap thinner parts of the food with aluminum foil.
se plastic wrap or cover with a lid.
Stir once or twice while cooking foods such as soup, cocoa, or milk.
�7
5. Exploded Views and Parts List
5-1 Exploded Views (00Version)
M015
M001
P109
M020
H018M023
P032
P004
M024
H024
P002
P012
P007
M050
P034
M134
M036
U003P016
P015M061
P003
P039
P029
P030
P053
T017
T001
W002
P122M048
M038M040
M111
M013 P058
X034
B006B001
M039M017
M042
M041
M049
M034
M059
M059
M087
C081
M068
P001T036T037T038
P059
M029
M035
P028
B018
M030
P141
B002B013
T030
M060
P090
P087 P088
P091 P089
M067
U012
U005
U008
U003
U003
U007
M036
M036
P159
U001
�8
5. Exploded Views and Parts List5. Exploded Views and Parts List
5-1 Exploded Views (01Version)
M015
M001
P109
M020
H018M023
P032
P004
M024
H024
P002
P012
P007
M050
P034
M036
U003P016
P015M061
P224
P039
P029
P030
P053
T017
T001
W002
P122M048
M038M040
M111
M013 P058
X034
B006B001
M039M017
M042
M041
M049
M034
M059
M059
M087
C081
M068
P001T036T037T038
P059
M029
M035
P028
M155
B018
M030
P141
B002B013
T030
M060
P090
P087 P088
P091 P089U012
U005
U008
U003
U003
U007
M036
M036
P159
U001
P025P036
P024
�9
5. Exploded Views and Parts List
No. Code No. Version Description Specification Q’ty SA/SNA
Remark
C001 DE94-01806B 1 ASSY CONTROL PANEL SMH8165WG/XAA,WHT,-,A 1 SA -
C003 RAS-SM7GV-11 1 ASSY PCB PARTS SMH8165(FIGARO),SMPS, 120 1 SA -
C082 DE94-01807U 1 ASSY CONTROL BOX SMH8165ST,120V60HZ,WHIT 1 SNA -
C089 DE39-40673A 1 WIRE HARNESS-H 120V60HZ,OTR6 ALL MODEL,G 1 SA -
D006 DE64-00337A 1 DOOR-C MO1650WA,PP,T2 .0,-,-,-,BLK,- 1 SA -
D007 DE61-00048A 1 SPRING-KEY BLUING,HSWR,PI1 .95,D8 .75,L43 1 SA -
H018 DE31-90051A 1 BLADE-FAN P .P,T,D130,-,-,-,- 1 SA -
M020 DE92-90552F 1 ASSY MOTOR FAN JVM1730/40/50,SMF-U1630A, 1 SA -
M023 DE31-00044A 1 MOTOR FAN SMF-U1630A,-,-,-,-,120V/60HZ,2 1 SA -
M048 DE61-00906A 1 BASE-PLATE OTR6/7,SECC,T0 .6,-,-,-,- 1 SA -
M049 DE31-10172C 1 MOTOR SYNCHRONOUS SSM-16HR,OTR,FREE,3,60 1 SA -
M068 DE64-01951B 1 GRILLE SMH8165WG/XAA,PC,-,-,-,-,WHT,- 1 SNA -