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MICROWAVE OVEN
C108ST

SERVICE
MICROWAVE OVEN

Manual
CONTENTS

1. Precaution 2. Specifications 3. Operating Instructions 4. Disassembly and Reassembly 5. Alignment and Adjustments 6. Troubleshooting 7. Exploded Views and Parts List 8. PCB Diagrams 9. Schematic Diagrams

LIBRA

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.

1. Precaution
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 (

)
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. 12. 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 the drawings 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.

1. All repairs should be done in accordance with the procedures described in this manual. This product complies with Federal Performance Standard 21 CFR Subchapter J(DHHS). 2. 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 found to 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 CENTER 10. Service technicians should remove their watches while repairing an MWO.

1-2 Special Servicing Precautions (Continued)
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.

1-3 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) 2. 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. Capacitor

H. V. Diode

Short

Touch chassis ground first then short to the high voltage capacitor terminal by using screwdriver or jumper wire. Fig. 1-1. Discharging the High Voltage Capacitor

PRECAUTION There 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.

PRECAUTION Never touch any circuit wiring with your hand nor with uninsulated tool during operation.

PRECAUTION Servicemen should remove their watches whenever working close to or replacing the magnetron.

2. Specifications
2-1 Table of Specifications
TIMER POWER SOURCE POWER CONSUMPTION 99 MINUTES 230V 50Hz, AC MICROWAVE : 1,400W GRILL : 1,300W CONVECTION : 1,700W OUTPUT POWER FROM 100 TO 900W(6 LEVEL POWER) (IEC-705 TEST PROCEDURE) OPERATING FREQUENCY MAGNETRON COOLING METHOD OUTSIDE DIMENSIONS SHIPPING WEIGHT 2,450MHz OM75PH(31) COOLING FAN MOTOR 517(W) x 310(H) x 511(D)mm 24.5 kg 27.5 kg

3. Operating Instructions
3-1 Control Panel

3-2 Features & External Views
Door Ventilation Holes Light Safety Interlock Holes

Control Panel

Glass Door Latches Grill Rack

Guide Roller Coupler

310mm

216mm 369mm 517mm 511mm

4. Disassembly and Reassembly
4-1 Replacement of Magnetron, Motor Assembly and Lamp
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 and lamp. 2. Remove the bracket mounting. 3. Remove the magnetron supporter. 4. Remove the air cover. 5. Remove screws securing the magnetron to the Magnetron wave guide. 6. Take out the magnetron very carefully. 7. Remove screws from the back panel. 8. Take out the fan motor. 9. Remove the oven lamp by rotating to pull out from hole of air cover.
Cover Air Thermo S/W

Fan Motor

H. V. Trans H.V Capacitor

Screw

NOTE1: When removing the magnetron, make sure that its antenna does not hit any adjacent parts, or it may be damaged. NOTE2: When replacing the magnetron, be sure to remount the magnetron gasket inthe correct position and make sure the gasket is in good

4-2 Replacement of High Voltage Transformer
1. 2. 3. 4. Discharge the high voltage capacitor. Disconnect all the leads. Remove the mounting bolts. Reconnect the leads correctly and firmly. PRECAUTION Servicemen should remove their watches whenever working close to or replacing the magnetron.

PRECAUTION There 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.

4-3 Replacement of Door Assembly
4-3-1 Removal of Door Assembly
securing the upper hinge and lower hinge. The remove door assembly.
Upper Hinge Screws

4-3-4 Removal of Key Door &Spring
Remove pin hinge from Door "E" Datach spring from Door "E" and key door.
Door "E"

Low Hinge Screws Key Door Spring

4-3-2 Removal of Door "C"
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.

4-3-5RemovalofScreen-Door&Deco-Door
1. Remove Door "E" from Door "A" 2. Remove Door-Screen"B" and Deco Door.

Deco-Door Door "C"

Door "A"

4-3-3 Removal of Door "E"
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. 1. Insertion depth of the thin metal plate should be 0.5mm or less.
Door "E"

4-3-6 Reassembly Test
After replacement of defective component parts of the door, reassemble it and follow the instructions below for proper installation and adjustment so as to prevent an excessive microwave leakage. 1. When mounting the door to the oven, be sure to adjust the door parallel to the bottom line of the oven face plate by moving the upper hinge and lower hinge in the direction necessary for proper alignment. 2. Adjust so that the door has no play between the inner door surface and oven front surface. If the door assembly is not mounted properly, microwave energy may leak from the space between the door and oven. 3. Do microwave leakage test.

4-4 Replacement of Fuse
1. Disconnect the oven from the power source. 2. When 15A fuse blows out by the operation of interlock monitor switch failure, replace the primary interlock switch, door sensing switch, monitor switch and power relay. 3. When the above three switches operate properly, check if any other part such as the control circuit board, blower motor or high voltage transformer is defective.

4-5 Replacement of Drive Motor
1. Take out the glass tray, guide roller and coupler from cavity. 2. Turn the oven upside down to replace the drive motor. 3. Remove a screw securing the drive motor cover. 4. Disconnect all the lead wires from the drive motor. 5. Remove screws securing the drive motor to the cavity. 6. Remove the drive motor. 7. When replacing the drive motor, be sure to remount it in the correct position. 8. Connect all the leads to the drive motor. 9. Screw the drive motor cover to the base plate with a screw driver. Drive Motor Cover Base Plate Screw Drive Motor

4-6 Replacement of Control Circuit Board
1. Be sure to disclyarge any static electricity from your body, and avoid touching the "touch control" circuitry. 2. Disconnect the connectors from the control circuit board. 3. Remove screws securing the control box assembly. 4. Lift up the control circuit board from right side and remove the hooks holding the control circuit board to the box assembly.
SCREWS

5. Alignment and Adjustments
PRECAUTION 1. High voltage is present at the high voltage terminals during any cook cycle. 2. It is neither necessary nor advisable to attempt measurement of the high voltage. 3. Before touching any oven components or wiring, always unplug the oven from its power source and discharge the high voltage capacitor.

5-1 High Voltage Transformer
1. Remove connectors from the transformer terminals and check continuity. 2. Normal resistance readings are as follows: Secondary Filament Primary Approx. 100 Approx. 0 Approx. 1.450 Primary Terminals Filament Terminals

(Room temperature = 20° C)

5-2 Low Voltage Transformer
1. The low voltage transformer is located on the Assy base plate. 2. Remove the low voltage transformer from the Assy base plate and check continuity. 3. Normal resistor reading is shown in the table. Terminals 1~2(Input) 3~4(Output) 5~6(Output) Resistance 290. 4.0.. 1.0.

5-3 Magnetron
1. Continuity checks can indicate only an open filament or a shorted magnetron. To diagnose an open filament or shorted magnetron : 2. Isolate the magnetron from the circuit by disconnecting its leads. 3. A continuity check across the magnetron filament terminals should indicate one ohm or less. 4. A continuity check between each filament terminal and magnetron case should read open. Magnetron Antenna Gasket Plate

Cooling Fins

5-4 High Voltage Capacitor
1. 2. 3. 4. 5. Check continuity of the capacitor with the meter set at the highest resistance scale. Once the capacitor is charged, a normal capacitor shows continuity for a short time, and then indicates 9M A shorted capacitor will show continuous continuity. An open capacitor will show constant 9M . Resistance between each terminal and chassis should read infinite. .

5-5 High Voltage Diode
1. Isolate the diode from the circuit by disconnecting its leads. 2. With the ohm-meter set at the highest resistance scale, measure across the diode terminals. Reverse the meter leads and read the resistance. A meter with 6V, 9V or higher voltage batteries should be used to check the front-to back resistance of the diode (otherwise an infinite resistance may be read in both directions). The resistance of a normal diode will be infinite in one direction and several hundred K in the other direction.

5-6 Main Relay and Power Control Relay
1. The relays are located on the PCB Ass'y. Isolate them from the main circuit by disconnecting the leads. 2. Operate the microwave oven with a water load in the oven. Set the power level set to high. 3. Check continuity between terminals of the relays after the start pad is pressed.

5-7 Adjustment of Primary Switch, Door Sensing Switch and Monitor Switch
Precaution For continued protection against radiation hazard, replace parts in accordance with the wiring diagram and be sure to use the correct part number for the following switches: Primary and secondary interlock switches, and the interlock monitor switch (replace all together). Then follow the adjustment procedures below. After repair and adjustment, be sure to check the continuity of all interlock switches and the interlock monitor switch. 1. When mounting Primary switch and Interlock Monitor switch to Latch Body, consult the figure. 2. No specific adjustment during installation of Primary switch and Monitor switch to the latch body is necessary. 3. When mounting the Latch Body to the oven assembly, adjust the Latch Body by moving it so that the oven door will not have any play in it. Check for play in the door by pulling the door assembly. Make sure that the latch keys move smoothly after adjustment is completed. Completely tighten the screws holding the Latch Body to the oven assembly. 4. Reconnect to Monitor switch and check the continuity of the monitor circuit and all latch switches again by following the components test procedures. 5. Confirm that the gap between the switch housing and the switch actuator is no more than 0.5mm when door is closed. 6. Interlock Switch Replacement - When replacing faulty switches, be sure switch mounting tabs are not bent, broken or otherwise deficient in their ability to secure the switches in place. Body Latch

Primary Interlock Switch

Interlock Monitor Switch Lever Door(B) Door Sensing Switch Door Open Door Closed Primary switch Monitor switch(COM-NC) Door Sensing S/W

0

0

0

5-8 Output Power of Magnetron
CAUTION MICROWAVE RADIATION
PERSONNEL SHOULD NOT ALLOW EXPOSURE TO MICROWAVE RADIATION FROM MICROWAVE GENERATOR OR OTHER PARTS CONDUCTING MICROWAVE ENERGY. The output power of the magnetron can be measured by performing a water temperature rise test. Equipment needed : * Two 1-liter cylindrical borosilicate glass vessel (Outside diameter 190 mm) * One glass thermometer with mercury column NOTE: Check line voltage under load. Low voltage will lower the magnetron output. Make all temperature and time tests with accurate equipment. 1. Fill the one liter glass vessel with water. 2. Stir water in glass vessel with thermometer, and record glass vessel's temperature ("T1", 10±1° C). 3. After moving the water into another glass vessel, place it in the center of the cooking tray. Set the oven to high power and operate for 49 seconds exactly. (3 seconds included as a holding time of magnetron oscillation:) 4. When heating is finished, stir the water again with the thermometer and measure the temperature ("T2"). 5. Subtract T1 from T2. This will give you the water temperature rise. ( T) 6. The output power is obtained by the following formula; Output Power = 4.187 x 1000 x T + 0.88 x Mc x(T2-T0) 46 49 : Heating Time (sec) 4.187 : Coefficient for Water 1000 : Water (cc) T : Temperature Rise (T1-T2) Mc : Cylindrical borosilicate glass weight To : Room Temperature

7. Normal temperature rise for this model is 9°C to 11° C at 'HIGH'. NOTE 1: Variations or errors in the test procedure will cause a variance in the temperature rise. Additional power test should be made if temperature rise is marginal. NOTE 2: Output power in watts is computed by multiplying the temperature rise (step E) by a factor of 91 times the of centigrade temperature.

5-9 Procedure for Measurement of Microwave Energy Leakage
1) Pour 275±15cc of 20±5° C(68±9° F) water in a beaker which is graduated to 600cc, and place the beaker in the center of the oven. 2) Start to operate the oven and measure the leakage by using a microwave energy survey meter. 3) Set survey meter with dual ranges to 2,450MHz. 4) When measuring the leakage, always use the 2 inch spacer cone with the probe. Hold the probe perpendicular to the cabinet door. Place the spacer cone of the probe on the door and/or cabinet door seam and move along the seam, the door viewing window and the exhaust openings moving the probe in a clockwise direction at a rate of 1 inch/sec. If the leakage testing of the cabinet door seam is taken near a corner of the door, keep the probe perpendicular to the areas making sure that the probe end at the base of the cone does not get closer than 5cm to any metal. If it gets closer than 5cm, erroneous readings may result. 5) Measured leakage must be less than 4mW/cm2 , after repair or adjustment.

Maximum allowable leakage is 5mW/cm2 . 4mW/cm2 is used to allow for measurement and meter accuracy

5-10 Check for Microwave Leakage
1. Remove the outer panel. 2. Pour 275±15cc of 20±5°C(68±9°F) water in a beaker which is graduated to 600cc, and place the beaker in the center of the oven. 3. Start the oven at the highest power level. 4. Set survey meter dual ranges to 2,450MHz. 5. Using the survey meter and spacer cone as described above, measure near the opening of magnetron, the surface of the air guide and the surface of the wave guide as shown in the following photo.( but avoid the high voltage components.) The reading should be less than 4mW/cm2 .

WARNING
AVOID THE HIGH VOLTAGE COMPONENTS

5-11 Note on Measurement

1) Do not exceed the limited scale. 2) The test probe must be held on the grip of the handle, otherwise a false reading may result when the operator's hand is between the handle and the probe. 3) When high leakage is suspected, do not move the probe horizontally along the oven surface; this may cause damage to the probe. 4) Follow the recommendation of the manufacturer of the microwave energy survey meter.

5-12 Leakage Measuring Procedure
5-12-1 Record keeping and notification after measurement 1) After adjustment and repair of a radiation preventing device, make a repair record for the measured values, and keep the data. 2) If the radiation leakage is more than 4 mW/cm2 after determining that all parts are in good condition, functioning properly and the identical parts are replaced as listed in this manual notify that fact to ;
CENTRAL SERVICE CENTER

5-12-2 At least once a year have the microwave energy survey meter checked for accuracy by its manufacturer.

6. Troubleshooting
PRECAUTION
1. 2. 3. 4. CHECK GROUNDING BEFORE CHECKING FOR TROUBLE. BE CAREFUL OF THE HIGH VOLTAGE CIRCUIT. DISCHARGE THE HIGH VOLTAGE CAPACITOR. 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.

6-1 Electrical Malfunction
SYMPTOM CAUSE CORRECTIONS 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. Oven is dead. 1. Open or loose lead wire harness Fuse is OK. 2. Open thermal cutout (Magnetron) No display and no operation at all. 3. Open low voltage transformer 4. Defective Ass'y PCB No display and no operation at all. 1. Shorted lead wire harness 2. Defective primary latch switch Fuse is blown. (NOTE 1) 3. Defective monitor switch (NOTE1) 4. Shorted H.V.Capacitor 5. Shorted H.V.Transformer (NOTE2)

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 2: When H.V.Transformer is replaced, check diode and magnetron also. Oven does not accept key input (Program) 1. Key input is not in-Sequence 2. Open or loose connection of membrane key pad to Ass'y PCB 3. Shorted or open membrane panel 4. Defective Ass'y PCB Refer to operation procedure.

Replace PCB main. Adjust door and latch switches.

1. Off-alignment of latch switches 2. Open or loose connection of high voltage circuit especially magnetron filament circuit NOTE: Large contact resistance will bring lower magnetron filament voltage and cause Timer starts countdown but no magnetron to lower output microwave oscillation. and/or intermittent oscillation. (No heat while oven lamp and fan 3. Defective high voltage motor turn on.) components H.V.Transformer H.V. Capacitor H.V.Diode, H.V.Fuse Magnetron 4. Open or loose wiring of power relay 5. Defective primary latch switch 6. Defective power relay or Ass'y PCB

Check high voltage component according to component test procedure and replace if it is defective.

Replace PCB main.

6-1 Electrical Malfunction(continued)
SYMPTOM Oven lamp and fan motor turn on CAUSE 1. Misadjustment or loose wiring of primary latch switch 2. Defective primary latch switch 1. Open or loose wiring of secondary interlock switch 2. Off-alignment of primary interlock 3. Defective secondary interlock S/W 1. Decrease in power source voltage. 2. Open or loose wiring of magnetron filament circuit. (Intermittent oscillation)) 3. Aging of magnetron CORRECTIONS Adjust door and latch switches.

Oven can program but timer does not start.

Adjust door and interlock switches.

Microwave output is low;. Oven takes longer time to cook food.

Consult electrician.

Fan motor turns on when plugged in Loose wiring of door sensing switch Check wire of door sensing switch. Oven does not operate and return to Defective Ass'y PCB the plugged in mode. Loud buzzing noise can be heard. 1. Loose fan and fan motor 2. Loose screws on H.V.Transformer 3. Shorted H.V.Diode 1. Open or loose wiring of turntable motor. 2. Defective turntable motor. 1. Open or loose wiring of primary interlock switch 2. Operation of thermal cutout(Magnetron) 1. Metallic ware or cooking dishes touching on the oven wall. 2. Ceramic ware trimmed with gold or silver powder also causes sparks. Replace PCB main.

Tighten screws of fan motor. Tighten screws of H.V.Transformer. Replace H.V.Diode. Replace turntable motor.

Turntable motor does not rotate.

Oven stops operation during cooking

Adjust door and latch switches.

Sparks

Inform the customer. Do not use any type of cookware with metallic trimming.

Uneven cooking

Uneven intensity of microwave due Wrap thinner parts of the food with to its characteristics. aluminum foil. Use 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.

Noise may result from the motor.

Replace turntable motor.

7. Exploded Views and Parts List
7-1 Exploded Views

MM42 MM52 MM21 MM67 MM01 MM73

MM62 MM66 MM63 MM58 MM65 MM17 MM71 MM61 MM60 MM69 MM72 MM87 MM68 MM57 MM35 MM06

MM07 MM55 MM05

MM59

MM03

MM17 MM18 MM56 MM10 MM19 MM16 MM20 MB01 MM22 MM28 MM14 MM29 MM125 MM30 MM31 MM104 MM106 MM103 MM32 MM105 MM27 MM93 MM33 MM64 MM64 MB04 MM88 MB05 MB03 MB02 MM09 MM50 MM08

7-2 Main Parts List No. MB01 MB02 MB02 MB04 MB05 MM01 MM03 MM05 MM06 MM07 MM08 MM09 MM10 MM14 MM16 MM17 MM18 MM19 MM20 MM21 MM22 MM27 MM28 MM29 MM30 MM31 MM32 MM33 MM35 MM42 MM50 MM52 MM55 MM56 MM57 MM58 MM59 MM60 MM61 MM62 MM63 MM64 MM64 MM65 MM66 MM67 MM68 MM69 MM71 MM72 MM73 MM88 MM93 Code No. DE93-20020D 3405-000175 3405-000178 DE66-90054B DE66-40021B DE70-00011F DE39-00345A DE96-00011A DE96-00070A DE39-00022A OM75P(31)ERH DE71-60016D 4713-001046 DE26-00063A DE71-00015A DE47-20009A DE74-20015G DE92-90189U DE67-60081A DE39-40409A DE31-10170A DE61-40065A DE80-10001P 2501-001015 DE61-50106A DE91-70065A DE91-70061A DE26-20152A DE32-10013A DE39-00042A DE27-10020C DE63-90035H 3601-001197 DE92-90555D DE61-50027B DE92-90554B DE71-60448A DE63-20017A DE47-00001A DE61-70060A DE61-30006A DE97-00136B DE97-00136D DE72-60035R DE61-50570C DE61-50565A DE60-40009B DE61-50021A DE61-50564A DE61-50347A DE73-90027A DE60-60025A

S.N.A : SERVICE NOT AVAILABLE
Description Specification M959/XSA,-,-,-,250V,15A,200gf,SPST-NO 250V,15A,200gf,SPST-NO NYLON#66(2021SW),40G,M959/X -,-,-,M959/XSA,-,-,MW5592S/XAX,C/STEEL,T0.6,W36 C109ST,230V50HZ,-,-,-,-,SN-3WUA,120V15A,3W 15A SMF-2N2EA1,230V50Hz,2420R -,250V,16A,-,KKP-4819D/B OM75P(31)ERH CK95,NYLYN#66(TEFRON523),-,-,240V,104mA,25W,ORG,25x62mm SHV-E2914A,230V,50HZ,2340V/3.4 CE2933,-,T0.3,W114.2,L121. PW2N-520PB,160/60,250V/7.5A,H -,T6,-,1.0CUFT(PPS)15.5,-,-,PPS,-,-,BROWN,3RD-1.0/1.3,230V50HZ,M9G45,CTW,-,-,M2LJ24Z702,ST-16F,220/ -,PP,T2x22x17mm,BLK,-,-,3RD(1.0-NEW),SGCC,T0.8,W345,L 1.0uF,2100V,BK,35X54X80,20mm -,SECC,T0.8,W31,L125.8,-,BMP28,SEMA,12KV,SUMI,THV060T-0800-H,5KV/0.80A,W SLV-105E,230V,50HZ,AC17V/3V,-, PT-312-K2,-,-,-,-,-,C100,230V50HZ,AMFO,-,-,-, TC-104,0.9uH*2,-,-,-,-,-,AC25 -,DFA20,T2,W190,L200,-,250V,15A,SLOW-BLOW,CERAMI C100,CONV,-,-,SECC,T1.0,W51,L55,CE945 C100,CONV,-,CK95,SCP3(Cr),T0.6,-,-,-,-,-,BRASS,T1.5,OD30.5,ID22.5 SHG-2933E,-,-,1300W(1250W),-,230V -,SK-5,T0.5,T0.5,-,-,-,-,-, -,ALUMINA,5G,2ND-W/P,-,-, CK95,LOW-RACK,-,MG104WA,114,FOOT,VE-TYPE CK135,SECC,T0.5,-,-,CK95,SECC,T0.8,-,-,-,D -,SECC,T0.5,W362,L294,-,SLOT,ID22.2,OD28,T1.2,TEFL -,SECC1,T0.8,32,32,-,-,SECC1,T0.6,W45,L21,-,-,BSS2-A,T1.0,W35,L43,MBGF CK95,-,-,-,-,NI-ZN,T13.8,W21.0,L28.0,BNF PP-JI350,BLK,-,-,-,-,-,Q'ty 1 1 2 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 4 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2 4 S.N.A MGT Remark

ASSY BODY LATCH SWITCH-MICRO SWITCH-MICRO LEVER-SWITCH LATCH-BODY PANEL-OUTER WIRE HARNESS-A ASSY NOISE FILTER ASSY-MOTOR FAN ASSY POWER CORD ASSY-MAGNETRON COVER-AIR LAMP-INCANDESCENT TRANS-H.V COVER-CEILING THERMOSTAT TRAY-COOKING ASSY-GUIDE ROLLER COUPLER WIRE HARNESS-E MOTOR-SYNCHRONOUS FOOT BASE-PLATE C-OIL BRACKET-HVC ASSY-HVD ASSY-H.V.FUSE TRANS-L.V SENSOR THERMISTOR WIRE HARNESS-B COIL-CHOKE CUSHION-RUBBER FUSE-CARTRIDGE ASSY-COVER ADIA(R) BRACKET-HEATER ASSY-COVER ADIA(L) COVER-BACK GASKET-HEATER HEATER SPRING-PLATE SUPPORT-HEATER ASSY-WIRE RACK ASSY-WIRE RACK GUIDE-AIR BRACKET-AIR GUIDE BRACKET-UPPER WASHER-TEFLON BRACKET-FLANGE BRACKET-TCO BRACKET-EARTH ASSY-CASING FERRITE-CORE PIN-FOOT

7-3 Door Parts List

MD08 MD04 MD09 MD06

MD24 MD02

MD12

MD07 MD10

MD03

MD27 MD31 MD14 MD01

No. MD01 MD02 MD03 MD04 MD06 MD07 MD08 MD09 MD10 MD12 MD14 MD17 MD24 MD27 MD31

Code No. DE94-00743A DE64-00223A DE67-20185C DE94-00075H DE64-40012C DE61-00199A DE61-80002A DE61-80003A DE64-00547A DE64-00194A DE64-00197A DE64-00542A DE94-00744A DE64-00540A DE64-00209B

Description ASSY DOOR DOOR-A SCREEN-DOOR ASSY DOOR-E(SEALANT) DOOR-C SPRING-KEY HINGE-UPPER HINGE-LOWER KEY-DOOR DOOR-SUB HANDLE-DOOR SCREEN-DOOR(B) ASSY DOOR-A BADGE-BRAND HANDLE-COVER C109ST,-,STS

Specification

Q'ty 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2

Remark

C109ST,PC,-,-,-,-,STS,CK95/CK99,-,T2.0,W317.5,L198 C100,SEALANT,3RD-1. CK95,PBT,-,-,-,-,BLK,M1977,HSWR,D6,-,-,25 1/4,25 1 WHT,SHV-745CC1,SSEC,T2.3,26, WHT,TN-5630T,SSEC,T2.3,26,77 C100,NYLON#66,-,-,-,-,GV10% V0 C109ST,PC(LEXAN#141),-,-,-,-,GR MW1490STA,ZN DIECASTING,-,-, C109ST,TEMP-GLASS,T2.0,-, C109ST,-,STAINLESS MW1480STA/XAA,DIA-CUTTING,T1 C139ST,PC(LEXAN141),-,-,-,-

7-4 Control Parts List

MC13

MC141 MC09

MC55

MC27 MC10 MC07 MC143

MC142

MC15 MC01

No. MC01 MC07 MC09 MC10 MC13 MC141 MC142 MC143 MC15 MC27 MC55

Code No. RC-C139ST-01 DE64-00455A DE64-00456A DE94-00741F DE64-00450A DE64-00451A DE64-00452A DE64-00453A DE64-00454A DE63-00079A

Description ASSY CONTROL-BOX ASSY PCB PARTS KNOB KNOB-COVER ASSY CONTROL-PANEL BUTTON-SELECT(A) BUTTON-SELECT(B) BUTTON-SELECT(C) BUTTON-START BUTTON-CANCEL COVER-LED -

Specification

Q'ty 1 1 1 1 1 1 1 1 1 1 1

Remark S.N.A

C109ST,230V50HZ CK3D79ST,PC,-,-,-,-,-,-,CK3D79ST,PC,-,-,-,-,-,-,-,C108ST,-,STS CK3D79ST,PC,-,-,SILVER, CK3D79ST,PC,-,-,SILVER, CK3D79ST,PC,-,-,SILVER, CK3D79ST,PC,-,-,SILVER,1.3 CK3D79ST,PC,-,-,SILVER,1.3 CK3D79ST,ABS,-,-,-,-,-,-,1.3 C

S.N.A : SERVICE NOT AVAILABLE

7-5 Casing Parts List
MA01

MA03 MA02 MA09

MA07

MA02

MA05

MA06 MA04 MA08

No. MA01 MA02 MA02 MA03 MA04 MA05 MA06 MA07 MA08 MA09

Code No. DE31-10171A DE31-90019A DE31-90020A DE47-70077A DE60-40026B DE62-90098B DE72-30016A DE92-90487A DE60-40014B DE61-50484A

Description MOTOR-CONVECTION BLADE-FAN BLADE-FAN HEATER-CONVECTION WASHER-PLAIN ADIABATIC-CASING BUSH-MOTOR ASSY-COVER CASING WASHER-C MOTOR BRACKET-HEATER

Specification SMC-105EA,230V/50HZ,280 SECC,T0.6,-,-,-,-,ALSTAR,T0.6,W250,L250,-,-,SHC-118E1,-,-,1680W,-, ID5.5,OD12,T1.0,SBC1,ZNC3,-,T8,W245,L336.8,CK95,-,MSWR3,L11.2,D5.6,RE-1300,-, CE115K,230V50HZ,-,-,-, M16,T1.0,SECC,ZNC3,-,-,-, -,STS430,T0.8,W27.2,L26,C

Q'ty 1 1 1 1 1 1 1 1 1 2

Remark

7-6 Standard Parts List
Code No. DE60-10012A DE60-10012A DE60-10012A DE60-10012A DE60-10018A DE60-10034A DE60-10045A DE60-10052A DE60-10070A DE60-10070A DE60-10070A DE60-10070A DE60-10070A DE60-10070A DE60-10070A DE60-10070A DE60-10070A DE60-10070A DE60-10080B DE60-10080B DE60-10082H DE60-10098A DE60-10122A DE60-10122A DE60-10122A DE60-20063A DE60-10045A DE60-10122A DE60-10122A DE60-10122A DE60-10012A DE60-10012A DE60-10088A Description SCREW-TAP TITE SCREW-TAP TITE SCREW-TAP TITE SCREW-TAP TITE SCREW-ASSY MACHINE SCREW-TH SCREW-TAP PH SCREW-TAP PH SCREW-TAP TH SCREW-TAP TH SCREW-TAP TH SCREW-TAP TH SCREW-TAP TH SCREW-TAP TH SCREW-TAP TH SCREW-TAP TH SCREW-TAP TH SCREW-TAP TH SCREW-WASHER SCREW-WASHER SCREW-A SCREW-ASSY TAP TITE SCREW-TAP TH SCREW-TAP TH SCREW-TAP TH BOLT-FLANGE SCREW-TAP PH SCREW-TAP TH SCREW-TAP TH SCREW-TAP TH SCREW-TAP TITE SCREW-TAP TITE SCREW-TAP PH Specification -,SWR10,M4,L10,TH,+,-,3,ZPC2,-,SWR10,M4,L10,TH,+,-,3,ZPC2,-,SWR10,M4,L10,TH,+,-,3,ZPC2,-,SWR10,M4,L10,TH,+,-,3,ZPC2,-,WS,MSWR10,SN1,PH,M4X0.7P,-,8,-,-,-,L10,STS304,TH,+,-,M4,-,-,-,FEFZY,-,PH,M3,-,L6,-,-,-,FEFZY,-,PH,M4,-,L8,-,-,-,FEFZY,2-SLOT,TH,M4,-,L12,-,-,-,FEFZY,2-SLOT,TH,M4,-,L12,-,-,-,FEFZY,2-SLOT,TH,M4,-,L12,-,-,-,FEFZY,2-SLOT,TH,M4,-,L12,-,-,-,FEFZY,2-SLOT,TH,M4,-,L12,-,-,-,FEFZY,2-SLOT,TH,M4,-,L12,-,-,-,FEFZY,2-SLOT,TH,M4,-,L12,-,-,-,FEFZY,2-SLOT,TH,M4,-,L12,-,-,-,FEFZY,2-SLOT,TH,M4,-,L12,-,-,-,FEFZY,2-SLOT,TH,M4,-,L12,-,-,2S,SWRCH18A,ZP2,PH,PI5,-,L10,-,-,2S,SWRCH18A,ZP2,PH,PI5,-,L10,-,-,-,-,-,2S-4X12,TOOTHED,-,-,-,-,GLD,SWRCH18A,ZPC2,PH,TC,-,M4X8,WT,-,-,FE,FN,TAP,TH,-,2-4X8,-,-,-,FE,FN,TAP,TH,-,2-4X8,-,-,-,FE,FN,TAP,TH,-,2-4X8,-,M4,10,ZPC3,YEL,MSWR,-,-,-,-,-,FEFZY,-,PH,M3,-,L6,-,-,-,FE,FN,TAP,TH,-,2-4X8,-,-,-,FE,FN,TAP,TH,-,2-4X8,-,-,-,FE,FN,TAP,TH,-,2-4X8,-,-,SWR10,M4,L10,TH,+,-,3,ZPC2,-,SWR10,M4,L10,TH,+,-,3,ZPC2,-,-,FEFZY,PLAIN,PH,M3,-,L8,-,Q'ty 1 1 3 1 2 1 2 2 2 4 3 1 1 2 1 1 2 2 4 4 5 2 3 2 1 4 1 3 2 4 1 1 8 Remark A-N-FILTER A-P-CORD B-PLATE C-B-EARTH B-EARTH SENSOR A-A-RIGHT A-A-LEFT A-C-BACK A-CASING A-THERMO-G B-A-GUIDE B-LATCH B-UPPER C-AIR C-BOX M-FAN MAGNETRON TRANS-HV P-OUTER M-DRIVE B-HEATER C-CEILING SENSOR HING-L/U B-C-MOTOR BKT-HEATER CV-CAS M-D-CONVE B-T-MOTOR -

8. P.C.B Diagrams
8-1 P.C.B Diagrams

8-2 P.C.B Parts List
Code No. 3501-001062 3501-001068 3501-001155 3601-001126 DE07-10096A DE09-00108A DE34-00041A DE34-00063A DE47-40024A DE61-90048D DE92-01004A 0401-001083 0401-001083 0402-001080 0403-001288 0501-000465 0504-001008 0504-001080 0504-001080 0601-001466 1202-000141 1404-000230 2001-000446 2007-000033 2007-000033 2007-000277 2007-000300 2007-000300 2007-000468 2007-000468 2007-000575 2007-000671 2007-000710 2007-000868 2007-000931 2007-000941 2007-000944 2203-000260 2203-000444 2203-000555 2203-001608 2401-000037 2401-000598 2401-000911 2401-000911 2401-001415 2401-001573 2401-002075 2801-003933 3404-001129 3711-000999 3711-001038 3711-004142 3711-004143 DE30-20016A DE41-00239A Description RELAY-POWER RELAY-POWER RELAY-MINIATURE FUSE-CARTRIDGE VF DISPLAY IC MICOM SWITCH-ENCODER SWITCH-PRESSURE HOLDER-FUSE HOLDER-DIGITRON ASSY PCB AUTO DIODE-SWITCHING DIODE-SWITCHING DIODE-RECTIFIER DIODE-ZENER TR-SMALL SIGNAL TR-DIGITAL TR-DIGITAL TR-DIGITAL LED IC-VOLTAGE COMP. THERMISTOR-PTC R-CARBON R-CHIP R-CHIP R-CHIP R-CHIP R-CHIP R-CHIP R-CHIP R-CHIP R-CHIP R-CHIP R-CHIP R-CHIP R-CHIP R-CHIP C-CERAMIC,CHIP C-CERAMIC,CHIP C-CERAMIC,CHIP C-CERAMIC,CHIP C-AL C-AL C-AL C-AL C-AL C-AL C-AL CRYSTAL-UNIT SWITCH-TACT CONNECTOR-HEADER CONNECTOR-HEADER CONNECTOR-HEADER CONNECTOR-HEADER BUZZER PCB-MAIN Specification 24VDC,523.2mW,16A,1FormA,15mS, 24Vdc,523mW,16A,1FormA,15mS,10 24VDC,200MW,3000MA,1FORMA,10MS,10MS 250V,1.6A,FAST-ACTING,CERAMIC,5x20mm SVM-07MM09,GRN/ORG,7DIG,112seg, TMP87PM14F,OTP-32K,QFP,8BIT-64PIN,-,-,-,28VDC,10mA,ENDLESS,-,JES1424G DAIL,28VDC,10mA,24,-,JES1424GS FH-51H,7.5A,-,-,-,-,BLK,NYLON#66,-,BLK,-,-,230V50HZ,VFD,RC-C139ST-00,C139ST MM4148,100V,150MA,LL-34,TP MM4148,100V,150MA,LL-34,TP GF1G,400V,1A,DO-214BA,TP ZMM55C5V1,4.8-5.4V,500MW,LL-34,TP MMBT3904,NPN,350MW,SOT-23,TP,30-300 RN2427,PNP,200MW,2.2K/10K,SOT-23,TP KRC246S,NPN,200mW,2.2K/10K,SOT-23,TP KRC246S,NPN,200mW,2.2K/10K,SOT-23,TP CHIP,GRN,1.4x1.25mm,570nm 7033,SOT-89,3P,-,SINGLE,0V,-,P 27ohm,20%,-,265V,1.5A,360mA,BK 2.2KOHM,5%,1/2W,AA,TP,3.3X9MM 0OHM,5%,1/8W,DA,TP,3216 0OHM,5%,1/8W,DA,TP,3216 100KOHM,1%,1/10W,DA,TP,2012 10KOHM,5%,1/10W,DA,TP,2012 10KOHM,5%,1/10W,DA,TP,2012 1KOHM,5%,1/10W,DA,TP,2012 1KOHM,5%,1/10W,DA,TP,2012 220OHM,5%,1/4W,DA,TP,3216 2KOHM,5%,1/10W,DA,TP,2012 3.9KOHM,5%,1/10W,DA,TP,2012 4.7KOHM,1%,1/10W,DA,TP,2012 470OHM,5%,1/10W,DA,TP,2012 47KOHM,5%,1/10W,DA,TP,2012 47KOHM,5%,1/8W,DA,TP,3216 10nF,10%,50V,X7R,TP,2012 1nF,10%,50V,X7R,TP,2012,0.02nF,5%,50V,NP0,TP,2012 22nF,+80-20%,50V,Y5V,TP,2012 470uF,20%,16V,GP,TP,8x11.5,5 1uF,20%,50V,GP,TP,4x7,5 22uF,20%,16V,GP,TP,5x7,5 22uF,20%,16V,GP,TP,5x7,5 470uF,20%,35V,GP,TP,10x20,5 47uF,20%,50V,GP,TP,6.3x11,2.5 4.7uF,20%,50V,GP,TP,5x11,5 8MHz,50ppm,28-AAA,12pF,70ohm,TP 12VDC,50mA,160gf,6.6x6.6x7mm,BOX,5P,1R,2.5mm,STRAIGHT,SN BOX,6P,1R,2.5mm,STRAIGHT,SN BOX,3P/5P,1R,5mm/2.5mm,STRAIGH BOX,2P/3P,1R,5mm/2.5mm,STRAIGH CBE2220BA,STICK,-,-,-,-,-,-,RC-C139ST-**,FR-1,1,-,-,T1.6*W197*L249,-,2ARRAY,Q'ty 1 2 5 1 1 1 1 1 1 1 1 5 9 4 3 1 1 5 8 10 1 2 6 7 53 1 5 3 5 5 6 2 1 1 3 3 1 4 3 2 4 1 1 1 1 1 1 1 1 9 1 1 1 1 1 1 Remark RY2 RY6,RY7 RY1,RY3,RY4,RY5,RY8 FUSE1 DSP1 IC1 ECD1 ECD2 FUSE1 DSP1 D04,D05,D06,D08,D09 D10~D18 D01,D02,D03,D07 ZD1,ZD2,ZD3 TR1 TR10,TR11,TR12 TR13~TR17 TR2~TR9 LD1~LD10 IC2 PTC1,PTC2 R42~R47 J01~J07 J11~J63 R18 R10,R14,R15,R31,R32 R35,R36,R41 R08,R09,R12,R13,R33 R34,R37~R40 R28~R30,R48~R50 R03,R04 R16 R17 R01,R02,R11 R25,R26,R27 R21~R24 C17~C20 C14~C16 C04,05 C03,C07,C09,C12 C06 C13 C08 C11 C01 C02 C10 XTL1 SW1~SW9 CN1 CN2 CN3 CN4 BUZ1 -

9. Schematic Diagrams
9-1 Schematic Diagrams

MAGNETRON

HIGH VOLTAGE DIODE FA F TO CHASSIS

HIGH VOLTAGE CAPACITOR RED RED

RED H.V.FUSE BLK WHT RED
SYMBOL BRN BLK RED BLU COLOR BROWN BLACK RED BLUE

HIGH VOLTAGE TRANSFORMER

ELECTRONICS

© Samsung Electronics Co., Ltd. April 2002 Printed in Korea Code No. : DE68-02584A