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BASIC: SMH7185 MODEL: SMH9187ST MODEL CODE: SMH9187ST/XAC 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.
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 ( 1.
1. Precaution 1-2 Special High Voltage Precautions 1. High Voltage Warning Do not attempt to measure any of H . V . Capacitor 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. Specifications 2-1 Features Product Features Samsung New OTR with Stainless Steel, it has professional look and the design matches great with other kitchen appliances, so that • Professional Design it provides harmonious kitchen interior and finally completes total kitchen solution. With 400CFM ventilation power, New OTR can keep the comfortable cooking condition by absorbing smoke and odor from cook-top.
2. Specifications 2-3 Table of Specifications Basic Model New Model SMH9187ST/XAA SMH9187ST/XAC Items SMH9187B/XAA SMH9187B/XAC SMH9187W/XAA SMH9187W/XAC Oven Cavity 1 .8 1 .8 Controls 10 power levels, including defrost 10 power levels, including defrost Timer 99 minutes, 99seconds 99 minutes, 99seconds Power Source 120VAC, 60Hz...
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...
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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) Panel Outer 7. Remove Screw .(2) 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. Disconnect Oven Power . 2. Remove Panel Outer . 3. Discharge The High Voltage Capacitor . ATTENTION : When discharge must become ground terminal of HVC and metal of around .
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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 . HV Trans 5. Remove screw .(3) 6. 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 .
3. Disassembly and Reassembly 3-4 Replacement of Door Assembly Parts Disassembly Photo Explaination Removal of 1. Open the Assembly Door by degree 90º Door Assembly 2. Seperate lifting Assembly Door from Set . 90º 2. Insert flat screwdriver into the gap between Door Removal of “A”...
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3. Disassembly and Reassembly 3-4 Replacement of Door Assembly Removal of 4. Remove 2 screws, then handle is detached from Handle Door “A” . 5. Following the procedure as shown in the figure, insert and bend a thin metal plate between Door Removal of “E”...
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 . Fuse 3. When 20A fuse blows out by the operation of interlock monitor switch failure, replace Fuse the primary interlock switch, secondary...
3. Disassembly and Reassembly 3-7 Replacement of stirrer motor Parts Explaination Photo Explaination 1. Disconnect power and remove Grille screws(3) . 2. Remove the bracket duct upper . Stirrer Motor 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 .
3. Disassembly and Reassembly 3-9 Replacement of Control Circuit Board Parts Explaination Photo Explaination 1. Disconnect power and remove Grille . 2. Be sure to ground any static electric charge in your body and never touch the control circuit . Removal of Control Box 3.
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 1. Unplug the oven or turn off the power at the main power .
3. Disassembly and Reassembly 3-11 Replacement of Oven Light Parts Explaination Photo Explaination 1. Disconnect Oven power . 2. Remove the Grille Oven Light 3. Remove the bracket Duct upper by remove 1 screw . 4. Replace the bulb with a 40 watt appliance bulb .
4. Troubleshooting 4. Troubleshooting 4-1 Error Code Numbering Rule 1. ERROR CODE NUMBERING RULE is applied to a microwave oven and an oven .(CMO, OTR, Grill, Convection, Commercial etc .) 2. All sensors and devices have their own number . ex) Gas Sensor = 1, Temp . Sensor = 2, . . . 3.
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4. Troubleshooting 4-2-1 Key Short Error “- SE -” is displayed. Is the key not recognized at all? Is the key recognized intermittently? Is a specific key not recognized? The membrane is defective. S/W Error Replace the Control Panel. After Power > On, does the symptom continue? Replace the PCB.
4. Troubleshooting PRECAUTION 1. CHECK GROUNDING BEFORE CHECKING FOR TROUBLE . 2. 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 .
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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 Replace PCB main. Defective Ass’y PCB Timer starts countdown but no microwave oscillation . (No heat while oven lamp and fan motor turn on.) Off-alignment of latch switches Adjust door and latch switches.
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Consult electrician. Loose wiring of door sensing switch on when plugged in (Intermittent oscillation) Aging of magnetron Fan motor turns Consult electrician. Loose wiring of door sensing switch on when plugged in Aging of magnetron Fan motor turns Consult electrician. Loose wiring of door sensing switch on when plugged in 4.
5. Exploded Views and Parts List 5-2 Main Parts List (S.N.A : SERVICE NOT AVAILABLE) Code No. Description Specification Q’ty SA/SNA Remark B013 DE66-90106B LEVER SWITCH-LOWER OTR6,PP,T1 .4,-,-,-,-, B022 DE96-00414A ASSY BODY LATCH RVM-1625BJ,- B047 3405-001033 SWITCH-MICRO 125/250VAC,16A,200gf,SPST-N B048 3405-001034 SWITCH-MICRO 125/250VAC,16A,200gf,SPST-N B064...
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5. Exploded Views and Parts List 5-2 Main Parts List (Continued) (S.N.A : SERVICE NOT AVAILABLE) Code No. Description Specification Q’ty SA/SNA Remark P014 DE72-40022A DAMPER-MAIN -,SECC,-,W28,L650,OTR4,-,T0 . P024 DE32-60011A SENSOR GAS TGS-880,-,-,-,-,-,-,-,- P025 DE61-90111A HOLDER-SENSOR -,POM(DURACON-M90-02),-,-, P034 DE97-00366J ASSY DUCT UPPER SMH9187,FH44N,SENSOR P036 DE39-40678D...
5. Exploded Views and Parts List 5-4 Control Parts List P156 C001 C003 P157 C009 C082 C303 C005 Z783 C004 (S.N.A : SERVICE NOT AVAILABLE) Code No. Description Specification Q’ty SA/SNA Remark C001 DE94-02001C ASSY CONTROL PANEL SMH9187,STS,PC,- C003 RAS-SM7MGV-07 ASSY PCB PARTS SMH9187,SMPS,120V60HZ C004...
8. Schematic Diagrams 8-1 Schematic Diagrams (This Document can not be used without Samsung’s authorization) T835-600B TAC201 BZ501 CBE2220BA IC101 TMP86CM72FG-CHUN DSP101 SVM-07SS10...