Service Manual
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Operating Instructions 4. Alignment and Adjustments 6. Disassembly and Reassembly 5. PCB Diagrams 9. Schematic Diagrams Exploded Views and Parts List 8. Troubleshooting 7. Specifications 3. Precaution 2. MICROWAVE OVEN MW7490W SERVICE Manual MICROWAVE OVEN SECA CONTENTS 1.
Operating Instructions 4. Alignment and Adjustments 6. Disassembly and Reassembly 5. PCB Diagrams 9. Schematic Diagrams Exploded Views and Parts List 8. Troubleshooting 7. Specifications 3. Precaution 2. MICROWAVE OVEN MW7490W SERVICE Manual MICROWAVE OVEN SECA CONTENTS 1.
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Samsung Electronics 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...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 ...
Samsung Electronics 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...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 ...
Service Manual
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... or assemblies, drain the electrostatic charge from your body by touching a known earth ground. 16. Although the microwave oven is completely safe during ordinary use oven until it has been brought into compliance at the same time:...The correct adjustment of its assemblies, be done in accordance with the door open : Instruct the user not to microwave radiation, as well as the Interlock Monitor Switch. Design Alteration Warning: Use exact replacement parts only, i.e., only ...connecting the positive lead; always remove the instrument's ground lead last. Samsung Electronics 1-1
... or assemblies, drain the electrostatic charge from your body by touching a known earth ground. 16. Although the microwave oven is completely safe during ordinary use oven until it has been brought into compliance at the same time:...The correct adjustment of its assemblies, be done in accordance with the door open : Instruct the user not to microwave radiation, as well as the Interlock Monitor Switch. Design Alteration Warning: Use exact replacement parts only, i.e., only ...connecting the positive lead; always remove the instrument's ground lead last. Samsung Electronics 1-1
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Specifications 2-1 Table of Specifications ITEM TIMER POWER SOURCE POWER CONSUMPTION OUTPUT POWER MODEL OPERATING FREQUENCY MAGNETRON COOLING METHOD OUTSIDE DIMENSIONS NET WEIGHT SHIPPING WEIGHT MW7490W 99 MINUTES 99 SECONDS 120V/60HZ, AC MICROWAVE : 1,450W FROM 100W TO 1000W (10 LEVEL POWER) (IEC-705 TEST PROCEDURE) 2,450MHz OM75PH(31)ESS COOLING FAN MOTOR 217/8(W) x 125/16(H) x 1621/32(D) 38.6 lbs. 43 lbs Samsung Electronics 2-1 2.
Specifications 2-1 Table of Specifications ITEM TIMER POWER SOURCE POWER CONSUMPTION OUTPUT POWER MODEL OPERATING FREQUENCY MAGNETRON COOLING METHOD OUTSIDE DIMENSIONS NET WEIGHT SHIPPING WEIGHT MW7490W 99 MINUTES 99 SECONDS 120V/60HZ, AC MICROWAVE : 1,450W FROM 100W TO 1000W (10 LEVEL POWER) (IEC-705 TEST PROCEDURE) 2,450MHz OM75PH(31)ESS COOLING FAN MOTOR 217/8(W) x 125/16(H) x 1621/32(D) 38.6 lbs. 43 lbs Samsung Electronics 2-1 2.
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...other part such as to the base plate with the coupler. 8. If the door assembly is defective. 4-5 Replacement of Drive Motor 1. Samsung Electronics Screw Drive Motor Drive Motor Cover Base Plate 4-3 When mounting the door to the oven, be sure to the bottom line of... 2. Connect all the lead wires from the drive motor. 5. Remove screws securing the drive motor to replace the drive motor. 3. Do the microwave leakage test. 4-4 Replacement of interlock monitor switch failure, replace the primary interlock switch, door sensing switch, monitor switch and power relay. 3. Remove...
...other part such as to the base plate with the coupler. 8. If the door assembly is defective. 4-5 Replacement of Drive Motor 1. Samsung Electronics Screw Drive Motor Drive Motor Cover Base Plate 4-3 When mounting the door to the oven, be sure to the bottom line of... 2. Connect all the lead wires from the drive motor. 5. Remove screws securing the drive motor to replace the drive motor. 3. Do the microwave leakage test. 4-4 Replacement of interlock monitor switch failure, replace the primary interlock switch, door sensing switch, monitor switch and power relay. 3. Remove...
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... Sensing Switch Primary switch Monitor switch (COM-NC) Door Sensing S/W Door Open ∞ 0 ∞ Door Closed 0 ∞ 0 5-2 Samsung Electronics Resistance between the switch housing and the switch actuator is no more than 0.5mm when door is necessary. 3. Reverse the meter leads and...its leads. 2. When mounting Primary switch and Interlock Monitor switch to high. 3. A shorted capacitor will show continuous continuity. 4. Operate the microwave oven with the meter set at the highest resistance scale. 2. Set the power level set to Latch Body, consult the figure. 2. ...
... Sensing Switch Primary switch Monitor switch (COM-NC) Door Sensing S/W Door Open ∞ 0 ∞ Door Closed 0 ∞ 0 5-2 Samsung Electronics Resistance between the switch housing and the switch actuator is no more than 0.5mm when door is necessary. 3. Reverse the meter leads and...its leads. 2. When mounting Primary switch and Interlock Monitor switch to high. 3. A shorted capacitor will show continuous continuity. 4. Operate the microwave oven with the meter set at the highest resistance scale. 2. Set the power level set to Latch Body, consult the figure. 2. ...
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...) ∆T : Temperature Rise (T2-T1) Mc : Cylindrical borosilicate glass weight To : Room temperature. 7. Samsung Electronics 5-3 The output power of Magnetron Alignment and Adjustments CAUTION MICROWAVE RADIATION PERSONNEL SHOULD NOT ALLOW EXPOSURE TO MICROWAVE RADIATION FROM MICROWAVE GENERATOR OR OTHER PARTS CONDUCTING MICROWAVE ENERGY. Stir water in the temperature rise. When heating is obtained by a factor...
...) ∆T : Temperature Rise (T2-T1) Mc : Cylindrical borosilicate glass weight To : Room temperature. 7. Samsung Electronics 5-3 The output power of Magnetron Alignment and Adjustments CAUTION MICROWAVE RADIATION PERSONNEL SHOULD NOT ALLOW EXPOSURE TO MICROWAVE RADIATION FROM MICROWAVE GENERATOR OR OTHER PARTS CONDUCTING MICROWAVE ENERGY. Stir water in the temperature rise. When heating is obtained by a factor...
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...keep the data. 2) If the radiation leakage is more than 5cm to operate the oven and measure the leakage by its manufacturer. 5-4 Samsung Electronics If it gets closer than 5cm, erroneous readings may result when the operator's hand is between the handle and the probe. 3) ... 5-12-1 Record keeping and notification after repair or adjustment. CENTRAL SERVICE CENTER 5-12-2 At least once a year have the microwave energy survey meter checked for Microwave Leakage 1. Set survey meter dual ranges to the cabinet door. Remove the outer panel. 2. Maximum allowable leakage is 5mW/cm2...
...keep the data. 2) If the radiation leakage is more than 5cm to operate the oven and measure the leakage by its manufacturer. 5-4 Samsung Electronics If it gets closer than 5cm, erroneous readings may result when the operator's hand is between the handle and the probe. 3) ... 5-12-1 Record keeping and notification after repair or adjustment. CENTRAL SERVICE CENTER 5-12-2 At least once a year have the microwave energy survey meter checked for Microwave Leakage 1. Set survey meter dual ranges to the cabinet door. Remove the outer panel. 2. Maximum allowable leakage is 5mW/cm2...
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...SWITCHES OR TRANSFORMER, DISCONNECT ONE LEAD WIRE FROM THESE PARTS AND THEN CHECK CONTINUITY WITHOUT THE POWER SOURCE ON. No display and no microwave oscillation. (No heat while oven lamp and fan motor turn on.) CAUSE CORRECTIONS 1. Fuse is not in-Sequence 2. Open thermal cutout... cause magnetron to component test procedure and replace if it has continuity, replace power relay also. NOTE 2: When HVTransformer is defective. Samsung Electronics 6-1 Defective Ass'y PCB Check fan motor when thermal cutout is replaced, check diode and magnetron also. 1. Open or loose ...
...SWITCHES OR TRANSFORMER, DISCONNECT ONE LEAD WIRE FROM THESE PARTS AND THEN CHECK CONTINUITY WITHOUT THE POWER SOURCE ON. No display and no microwave oscillation. (No heat while oven lamp and fan motor turn on.) CAUSE CORRECTIONS 1. Fuse is not in-Sequence 2. Open thermal cutout... cause magnetron to component test procedure and replace if it has continuity, replace power relay also. NOTE 2: When HVTransformer is defective. Samsung Electronics 6-1 Defective Ass'y PCB Check fan motor when thermal cutout is replaced, check diode and magnetron also. 1. Open or loose ...
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...door and latch switches. Tighten screws of the food with metallic trimming. Wrap thinner parts of fan motor. Replace turntable motor. 6-2 Samsung Electronics Oven stops operation during cooking Sparks Uneven cooking CAUSE 1. Open or loose wiring of turntable motor. 2. Adjust door and interlock... or twice while cooking foods such as soup, cocoa, or milk. Off-alignment of microwave due to cook food. Defective turntable motor. 1. Uneven intensity of primary interlock 3. Microwave output is low;. Decrease in mode. Open or loose wiring of H.V.Transformer. Noise may...
...door and latch switches. Tighten screws of the food with metallic trimming. Wrap thinner parts of fan motor. Replace turntable motor. 6-2 Samsung Electronics Oven stops operation during cooking Sparks Uneven cooking CAUSE 1. Open or loose wiring of turntable motor. 2. Adjust door and interlock... or twice while cooking foods such as soup, cocoa, or milk. Off-alignment of microwave due to cook food. Defective turntable motor. 1. Uneven intensity of primary interlock 3. Microwave output is low;. Decrease in mode. Open or loose wiring of H.V.Transformer. Noise may...