BASIC: SMH7185STG MODEL: SMH7187STG MODEL CODE: SMH7187STG/XAA 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 Refer to the service manual in the GSPN(see rear cover) for the more information.
• Contents 1. Precaution. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 1-1 Safety precautions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 1-2 Special High Voltage Precautions . . . . . . . . . . . . . . . . . . . . . .
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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 ( ) 13. Design Alteration Warning: Use exact replacement parts only, i.e.,only those that are specified in thedrawings and parts lists of this manual.
1. Precaution 1-2 Special High Voltage Precautions 1. 2. 3. 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.
2. Specifications 2-1 Features Product Features • Professional Design Samsung New OTR with Stainless Steel, it has professional look and the design matches great with other kitchen appliances, so that it provides harmonious kitchen interior and finally completes total kitchen solution. • Turbo vent With 400CFM ventilation power, New OTR can keep the comfortable cooking condition by absorbing smoke and odor from cook-top.
2. Specifications 2-2 Accessory Item Description Code No.
2. Specifications 2-3 Table of Specifications Items Basic Model New Model SMH7185STG SMH7187STG 1.8 1.8 1100 1650 1100 1650 Touch Touch 1 Line VFD 1 Line VFD 99 min. 99 sec. 99 min. 99 sec. Cavity Size (cu.ft.
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3. Disassembly and Reassembly MAGNETRON, MOTOR ASSEMBLY, VENT BLOWER AND HIGH VOLTAGE TRANSFORMER Oven must be removed from wall. REMOVING OVEN FROM WALL (2 PEOPLE REQUIRED) Oven is hooked on metal tabs at bottom of wall mounting plate and to cabinet by (3) top cabinet bolts. 3-1 Disassembly of Assembly Grille and Panel Outer Parts Explaination Photo Explaination 1. Disconnect oven power. 2. Remove Grille. 1) Remove 2 screws 2) Slide the Grille to the left, then pull it straght out. Grille 1. 2.
3. Disassembly and Reassembly 3-1 Disassembly of Assembly Grille and Panel Outer Parts Explaination Photo Explaination 5. Remove Screw.(4) 6. Remove Screw.(2) 7. Remove Screw.(2) Panel Outer Explaination Photo Explaination 8. Remove Panel Outer.
3. Disassembly and Reassembly 3-2 Replacement of High Voltage Transformer and HVC and Base bottom Parts Explaination Photo Explaination 1. 2. 3. Disconnect Oven Power. Remove Panel Outer. Discharge The High Voltage Capacitor. ATTENTION : W hen discharge must become ground terminal of HVC and metal of around. High voltage capacitor 4. 5. Remove screw.(1) Disconnect the Lead Wire. 1. 2. Base Bottom 3. 1. 2. HV Trans 3. 12 Remove Screw.(5) Disconnect Lamp Housing. Remove Base bottom.
3. Disassembly and Reassembly 3-2 Replacement of High Voltage Transformer and HVC and Base bottom Parts Explaination Photo Explaination 4. Disconnect the Lead Wire. 5. 6. Remove screw.(3) Take out the HV Trans.
3. Disassembly and Reassembly 3-3 Replacement of Magnetron Parts Explaination Photo Explaination 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. Magnetron 2. 3. Remove nuts (4) securing the magnetron to the wave guide. Take out the magnetron very carefully.
3. Disassembly and Reassembly 3-4 Replacement of Door Assembly Parts Removal of Door Assembly Disassembly Photo Explaination 90º Removal of Door C Removal of Key Door & Spring 15 1. 2. Open the Assembly Door by degree 90º Seperate lifting Assembly Door from Set. 2. Insert flat screwdriver into the gap between Door “A” and Door “C” to remove Door “C”. • B ecareful when handling Door “C” because it is fragile. 3. Detach the spring and key door from Door.
3. Disassembly and Reassembly 3-4 Replacement of Door Assembly Removal of Handle Removal of Door “E” PRECAUTION PERFORM MICROWAVE LEAKAGE TEST 16 4. Remove 2 screws, then handle is detached from Door “A”. 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. • I nsertion depth of the thin metal plate should be 0.5mm or less.
3. Disassembly and Reassembly 3-5 Replacement of Fuse Parts Explaination Photo Explaination The fuse is located on the noise filter. 1. Disconnect power and remove grilleand Assembly Control Box. 2. 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.
3. Disassembly and Reassembly 3-7 Replacement of stirrer motor Parts Explaination Photo Explaination Stirrer Motor 18 1. Disconnect power and remove Grille screws(3). 2. Remove the bracket duct upper. 3. Disconnect the stirrer motor wire. 4. Remove stirrer motor screws(1) and after turn to arrow direction pull the stirrer motor.
3. Disassembly and Reassembly 3-8 Removal of stirrer Parts Explaination Photo Explaination 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. Stirrer 19 1. Disconnect power and open the door. 2. Remove the clip and turn the stirrer cover left. 3. Remove stirrer cover and the stirrer will come with it.
3. Disassembly and Reassembly 3-9 Replacement of Control Circuit Board Parts Explaination Photo Explaination Removal of Control Box Assembly 1. Disconnect power and remove Grille. 2. 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. 1.
3. Disassembly and Reassembly 3-10 Replacement of Cooktop lamp When 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 21 1. Unplug the oven or turn off the power at the main power. 2. 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.
3. Disassembly and Reassembly 3-11 Replacement of Oven Light Parts Explaination Photo Oven Light 22 Explaination 1. Disconnect Oven power. 2. Remove the Grille 3. Remove the bracket Duct upper by remove 1 screw. 4. Replace the bulb with a 40 watt appliance bulb.
4. Troubleshooting 4-1 Error Code Numbering Rule 1. 2. 3. 4. 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, ... Of each device, No.1 and No.2 refer to “Open Error” (not sensed) and “Short Error”, respectively. This numbering rule has been applied to models to have been developed since January, 1, 2005. (But, GE or Customize model are excluded.
4. Troubleshooting 4-2-1 Key Short Error “- SE -” is displayed. YES Is the key not recognized at all? NO YES Is the key recognized intermittently? NO Is a specific key not recognized? YES NO The membrane is defective. Replace the Control Panel. S/W Error After Power > On, does the symptom continue? NO YES Replace the PCB. Perform the operation again and check if it is working properly.
4. Troubleshooting PRECAUTION 1. 2. 3. 4. 5. 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. DO NOT TOUCH ANY PART OF THE CIRCUIT OR THE CONTROL CIRCUIT BOARD, SINCE STATIC DISCHARGE MAY DAMAGE IT.
Oven does not accept key input Open or loose connection of membrane key pad to Ass’y PCB 4. Troubleshooting Shorted or open membrane panel Defective Ass’y PCB Replace PCB main. Timer starts countdown but no microwave oscillation. (No heat while oven lamp and fan motor turn on.) Timer starts countdown but no microwave oscillation Off-alignment of latch switches Adjust door and latch switches.
Loose wiring of door sensing switch (Intermittent oscillation) on when plugged in Aging of magnetron Fan motor turns Loose wiring of door sensing switch on when plugged in Aging of magnetron Fan motor turns Loose wiring of door sensing switch on when plugged in Oven does not Fan motor turns to operate and return Loose wiring of door Defective Ass’y PCB sensing switch onOven when plugged does not in the plugged Fan motor turns operateinand return to mode Loose wiring of door Defective Ass’y PCB sensing switc
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5. Exploded Views and Parts List 5-2 Main Parts List (S.N.A : SERVICE NOT AVAILABLE) Level No. Code No. 1-1 M036 4713-001013 1-1 M038 1-1 M024 1-1 1-1 Description Specification Q’ty SA/ SNA Remark LAMP-INCANDESCENT 130V,-,40W,ORG,E17/20, 1 SA - DE26-00126A TRANS H.
5. Exploded Views and Parts List 5-2 Main Parts List (S.N.A : SERVICE NOT AVAILABLE) Level No. Code No. Description 1-2 M041 DE91-70063D ASSY-HVD 1-3 M041 0402-001554 1-1 B018 DE96-00414A 1-2 B002 1-2 1-2 Specification Q’ty SA/ SNA HV03-12,MWO-GE,RED 1 SA - HVDIODE-RECTIFIER HV03-12T01,12000V,0.
5. Exploded Views and Parts List 5-3 Door Parts List D016 D004 D005 D006 D024 D037 D002 Z779 D011 D060 D020 D073 D127 D049 D085 (S.N.A : SERVICE NOT AVAILABLE) Level No. Code No. Description Specification 1-1 D049 DE94-01612C ASSY DOOR SMH7185STG/XAA,STS,NEW WAVE 2 C003 1 SA - 1-2 D060 6107-001175 SPRING-ES HSWR,BLUING,PI0.95,D8.5,L48.4 1 SNA - 1-2 D005 DE01-00127A FILM-DOOR JVM-1860,POLYESTER,-,L479,T0.
D049 D127 D085 5. Exploded Views and Parts List 5-4 Control Parts List C003 C009 C004 C005 Z783 C089 C082 M011 C074 C073 C001 (S.N.A : SERVICE NOT AVAILABLE) Level No. Code No.
5. Exploded Views and Parts List 5-5 Standard Parts List (S.N.A : SERVICE NOT AVAILABLE) Level Code No. Description 1-1 6002-000643 SCREW-TAPPING 1-1 6002-001173 1-1 6003-001568 1-1 1-1 Specification Q’ty SA/ SNA TH,+,2S,M4,L10,ZPC(YEL),SW 1 SA CVT FRONT+B.PLATE SCREW-TAPPING FH,+,2S,M4,L12,ZPC(BLK),MS 2 SA O/PANEL,GRILLE SCREW-TAPTITE FH,TORX,-,B-TITE,M4,L14,NI 1 SA BODY LATCH 6006-001170 SCREW-ASSY TAPP WS,TH,+,M4,L10,ZPC(YEL) 3 SA P.CORD,N.FILTER E.& BKT.HVC,H.
6. PCB Diagrams 6-1 PCB Diagrams (This Document can not be used without Samsung’s authorization) ⑤ ④ 12 11 10 9 8 7 6 5 4 3 2 1 No.
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