Samsung SMH7185STG Service Manual Download Page 24 | Manualshive

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4

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 key

not recognized?

Is the key recognized

intermittently?

The membrane

is defective.

Replace the

Control Panel.

Is the key not recognized

at all?

After Power > On,

does the symptom continue?

Replace the PCB.

4--1 Key Short Error

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Summary of Contents for SMH7185STG

Page 1: ...r 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 SMH7185STG MODEL SMH7187STG MODEL CODE SMH7187STG XAA ...

Page 2: ... Fuse 17 3 6 Replacement of Drive Motor 17 3 7 Replacement of stirrer motor 18 3 8 Removal of stirrer 19 3 9 Replacement of Control Circuit Board 20 3 10 Replacement of Cooktop lamp 21 3 11 Replacement of Oven Light 22 4 Troubleshooting 23 4 1 Error Code Numbering Rule 23 4 2 Error Code List 23 4 3 Electrical Malfunction 25 5 Exploded Views and Parts List 28 5 1 Exploded Views 28 5 2 Main Parts Li...

Page 3: ... 1 Precaution ...

Page 4: ...k 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 s...

Page 5: ...ained 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 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 wor...

Page 6: ...New OTR Big Interior capacity for convenience With the 1 8 cu ft capacity it offers enough space to cook The big capacity combined with 1 100 watts of output achieves superior cooking results Auto Louver SMH7187STG Only Motorized Louver is opened automatically only when OTR is working Therefore you can prevent the contamination and also clean the OTR easily You don t need to spend much time to cle...

Page 7: ...ry Item Description Code No Q ty TRAY COOKING DE74 20002C 1 ASSY GUIDE ROLLER DE97 00368A 1 ASSY HOOD DAMPER DE92 90242D 1 ASSY HARD WARE DE92 90505E 1 FILTER AIR DE63 00196A 2 FILTER CHARCOAL DE63 00367D 1 RACK WIRE DE75 00036A 1 ...

Page 8: ...One Touch Instant Cook Pads Sensor 9 Sensor 9 Handy Helper Yes Yes Kids Meals Yes Yes Snack bar Yes Yes Custom Cook Yes Yes Brown Combi Convection Speed cook More Less Yes Yes Various Cooking Modes Convection Temperature Cooking Stages 3 3 One Minute Plus Yes Yes Time Plus Clock Yes Yes Kitchen Timer Yes Yes Help Screen Yes Yes Language Option En Fr Sp En Fr Sp Weight Option Kg Lb Kg Lb Word Promp...

Page 9: ...Motor Vent Non Motorized Vent Motorized Vent Accessories Rack 1 Position 1 Rack 1 Position 1 Rack Cook Book Properties Cabinet Colour Black White Black White Cavity Interior Epoxy Epoxy Cabinet Dimensions W x H x D inches 297 8 x 161 2 x 1515 32 297 8 x 161 2 x 1515 32 Net Weight lb 24 2Kg 53 35lbs 24 2Kg 53 35lbs 24 6kg 54 23lbs STG 24 6kg 54 23lbs STG Shipping Properties Shipping Dimensios W x H...

Page 10: ...ked 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 Grille 1 Disconnect oven power 2 Remove Grille 1 Remove 2 screws 2 Slide the Grille to the left then pull it straght out Panel Outer 1 Disconnect oven power 2 Remove Grille 3 Remove Screw 7 4 Remove Screw 4 ...

Page 11: ...and Reassembly Parts Explaination Photo Explaination Panel Outer 5 Remove Screw 4 6 Remove Screw 2 7 Remove Screw 2 Explaination Photo Explaination 8 Remove Panel Outer 3 1 Disassembly of Assembly Grille and Panel Outer ...

Page 12: ... Remove Panel Outer 3 Discharge The High Voltage Capacitor ATTENTION When discharge must become ground terminal of HVC and metal of around 4 Remove screw 1 5 Disconnect the Lead Wire Base Bottom 1 Remove Screw 5 2 Disconnect Lamp Housing 3 Remove Base bottom HV Trans 1 Disconnect Oven Power 2 Remove the Base bottom and Panel Outer 3 Disassembly the Bracket Duct upper after remove screw ...

Page 13: ...isassembly and Reassembly Parts Explaination Photo Explaination HV Trans 4 Disconnect the Lead Wire 5 Remove screw 3 6 Take out the HV Trans 3 2 Replacement of High Voltage Transformer and HVC and Base bottom ...

Page 14: ...magnetron 2 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 NOTE2 When replacing the magnetron be sure to remount the magnetron gasket in the correct position and make sure the gasket is in good condition PRECAUTION During replacement be cer...

Page 15: ...r Assembly 1 Open the Assembly Door by degree 90º 2 Seperate lifting Assembly Door from Set Removal of Door C 2 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 90º ...

Page 16: ...or 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 PRECAUTION PERFORM MICROWAVE LEAKAGE TEST 3 4 Replacement of Door Assembly ...

Page 17: ...itor 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 6 Replacement of Drive Motor Parts Explaination Photo Explaination Drive Motor 1 Disconnect power and remove Base bottom screws 5 2 Remove Base bottom and disconnect the turntable motor drive 3 Remove turntable...

Page 18: ...motor Parts Explaination Photo Explaination Stirrer Motor 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 ...

Page 19: ...otor 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 2 Remove the clip and turn the stirrer cover left 3 Remove stirrer cover and the stirrer will come with it ...

Page 20: ... 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 2 Remove screws 3 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 tha...

Page 21: ...o 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 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 ...

Page 22: ...embly 3 11 Replacement of Oven Light Parts Explaination Photo Explaination Oven Light 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 ...

Page 23: ...o 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 Customize model are excluded DEVICE ERROR CASE 0 Others 1 Open 1 Gas Sensor 2 Short 2 Temp Sensor 3 Weight Sensor 4 Easy PH Sensor 5 EEPROM 4 2 Error Code List Error Code Others E 0X Letter Solution Page SE Key Short Error 1...

Page 24: ...n again and check if it is working properly S W Error Is a specific key not recognized Is the key recognized intermittently The membrane is defective Replace the Control Panel Is the key not recognized at all After Power On does the symptom continue Replace the PCB 4 2 1 Key Short Error ...

Page 25: ...rmer 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 Off alignment of latch switches Open or loose connection of high Adjust door and latch switches Check high voltage component accordin...

Page 26: ...Off alignment of primary interlock Defective secondary interlock S W Open or loose wiring of Replace turntable motor Loud buzzing noise can 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...

Page 27: ...ing foods such as soup cocoa or milk Sparks Turntable motor does not 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 cust...

Page 28: ...30 P097 P122 U003 W022 M219 W023 P016 P034 P013 P014 P001 P039 P032 M015 M001 M035 M029 M021 M023 M017 H018 P109 M040 M039 M041 M206 P059 M050 B002 B001 B013 U004 U007 M167 U001 P122 P123 M038 P121 M048 M155 M036 U003 P012 M024 M060 P090 P087 P088 P091 P089 P007 H032 P098 P178 P112 P179 P113 P101 P117 P099 M067 P226 P104 P100 P102 M068 D060 D060 C089 P015 ...

Page 29: ... DE75 00036A RACK WIRE SMH7175 SNC2 D5 1 SA 1 1 P012 DE92 90242D ASSY HOOD DAMPER JVM 1870 JVM250BL OTR4 1 SA 1 2 P013 DE71 60051B COVER DAMPER JVM 1870 0 22 68 248 4 1 SA 1 2 P014 DE72 40022A DAMPER MAIN SECC W28 L650 OTR4 T0 1 SA 1 1 M060 DE92 90505E ASSY HARD WARE SMH7175 1 SA 1 2 P087 DE60 10111A SCREW LAG MSWR W1 4X50 1 SA 1 2 P088 DE60 20022A BOLT TOGGLE MSWR W3 16X75 1 SA 1 2 P089 DE60 2006...

Page 30: ... 1 SA 1 3 P179 3405 001051 SWITCH MICRO 125V 0 1A 60GF SPNO 1 SA 1 3 W023 DE39 00253A WIRE HARNESS CAM JVM 1860 1 SA 1 3 P112 DE61 00118A BRACKET CAM PLATE JVM 1860 SCP T2 0 W60 1 SA 1 3 P113 DE72 00145A CAM LOUVER JVM 1860 POM KEPITAL FE 22 1 SA 1 3 H032 DE31 10154C MOTOR DRIVE M2CK59ZT69 H 120V60HZ 1 SA ASSY CAM LOUVER 1 2 P097 DE97 00371B ASSY DUCT UPPER SUB JMV8186 HUMIDITY SE 1 SA 1 3 U003 DE...

Page 31: ...OATING 1 SA 1 2 D020 DE94 01625C ASSY HANDLE 120V 60HZ NEW WAVE 2 STS AL 1 SA 1 3 D073 DE63 00445A EARTH DOOR NEW WAVE 2 STS430 T0 15 1 SA 1 3 D127 DE64 01802A HANDLE TUBULAR SMH7187STG AL 1 SA 1 3 D085 DE67 00222C CAP HANDLE NEW WAVE 2 PC STS SPRAY 1 SA 1 2 D037 DE94 01626A ASSY DOOR A SMH7185STG XAA STS NEW WAVE 1 SA 1 3 D016 DE64 01769A DOOR SUB NEW WAVE 2 PC BLACK 1 SA 1 3 Z779 DE64 01770A INL...

Page 32: ...XAA 1 1 SNA 1 3 C009 DE64 00766D WINDOW DISPLAY SMH7185 SAN CR 5381 W3 1 SA 1 3 C005 DE64 01766A CONTROL PANEL NEW WAVE 2 PC BLAC 1 SNA 1 3 Z783 DE64 01771A INLAY CONTROL NEW WAVE 2 STS430 T0 3 1 SNA 1 2 C073 DE94 01619A ASSY BRACKET C PANEL 120V 60HZ NEW WAVE 1 SA 1 3 M011 DE61 00162A BRACKET EARTH JVM 1860 SECC T0 6 W39 L61 1 SA 1 3 C074 DE61 00940A BRACKET C PANEL NEW WAVE 2 SECC T0 4 1 SA 1 2 ...

Page 33: ... FLANGE M5 P0 8 MSWR10 FEFZY 1 SA MGT 1 2 DE60 10111A SCREW LAG MSWR W1 4X50 1 SA 1 2 DE60 20022A BOLT TOGGLE MSWR W3 16X75 1 SA 1 2 DE60 20066A BOLT FLAT UNF1 4 L110 MSWR10 OTR6 1 SA 1 2 DE60 30022A NUT TOGGLE SBC1 ZPC2 WHT 1 SA 1 1 DE92 90508A ASSY HOLDER NUT OTR6 1 SA 1 2 6002 000234 SCREW TAPPING TH 2S M4 L16 ZPC YEL SM 1 SA HANDLE DOOR E 1 3 DE60 10067A SCREW TAP TH FEFZB 2 SLOT TH M4 L8 1 SA...

Page 34: ...onnecting Door and SMPS Power supply 5 CN402 A Terminal for connecting with Louver A Terminal for Connecting Louver and SMPS Power supply 6 CN601 A Terminal for connecting with Connector A Terminal for Connecting with Connector and SMPS Power Supply 7 RY201 Main Relay Power Supply Relay 8 RY202 Inrush Relay Inrush Electric Current Decrease Device 9 RY203 Power High Relay MWO Control Relay Power Hi...

Page 35: ...35 7 Wiring Diagrams 7 1 Wiring Diagrams This Document can not be used without Samsung s authorization ...

Page 36: ...36 7 Wiring Diagrams 7 1 Wiring Diagrams This Document can not be used without Samsung s authorization ...

Page 37: ...F 5 VDD 64 VDD 1 31 63 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 22 24 25 26 28 29 32 18 19 62 61 60 59 58 57 56 23 AVSS 20 INT0 10 12 13 14 15 16 17 9 27 7 21 KRC246M TR206 TMP86CM72FG CHUN IC101 R601 2K 1T4 D210 1N4148M D609 1N4148M D201 R306 100K R305 2K 470 D204 MM4148 D109 SB140 R503 UF4007 D107 2K R502 IC103 7033P 2K R111 DGND DGND 5V 10uF C114 R303 200K R105 1K 5V 1N4007 D105 2K R409 4 7...

Page 38: ...sungportal com Latin America latin samsungportal com CIS cis samsungportal com Europe europe samsungportal com China china samsungportal com Asia asia samsungportal com Mideast Africa mea samsungportal com Samsung Electronics Co Ltd July 2007 Printed in Korea Code No DE68 04537A ...

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