Samsung NV75N7570RS Service Manual Download Page 37

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Failure of heating

elements

- Repair Faulty wiring

(Possible terminal contact failure)

- Replace the Lower TCO

Replace the Grill TCO

- Repair Faulty wiring

(Possible terminal contact failure)

Perform ‘PCB Check Process’

- TCO Open?

- Check Relay Terminal Volt-

age (230~240V)

Replace heater

• After removing Heater Wire

- Check Heater resistance (Large G :32.8Ω,

Small G:48.6Ω, Bottom : 48.1Ω, Conv:44Ω)

- Upper convection heater failure?

- Check heater’s terminal

voltage (230~240V)

YES

4-2-12 Failure of heating elements

Summary of Contents for NV75N7570RS

Page 1: ...roduct Specification 3 Disassembly and Reassembly 4 Troubleshooting 5 Wiring Diagrams 6 PCB Diagrams Refer to the service manual in the GSPN see rear cover for the more information BASIC NV75N7570RS MODEL NV75N7546RB MODEL CODE NV75N7546RB NV75N7546RS ...

Page 2: ...of Thermostat 17 3 12 Replacement of Terminal Block 19 3 13 Replacement of Sensor Thermistor 19 3 14 Replacement of Heater Grill 20 3 15 Replacement of Heater Bottom 20 3 16 Replacement of Assy PCB Parts Main PCB 21 3 18 Replacement of Rack Wire Support 22 3 19 Replacement of Guide Rail Telescopic 22 3 20 How to enter the Demo mode 23 4 Troubleshooting 24 4 1 Part Checking method 24 4 2 1 Temp Sen...

Page 3: ... the AC power source before attempting to remove or reinstall any component or assembly 8 Never defeat any of the B voltage interlocks Do not apply AC power to the unit or any of its assem blies unless all solid state heat sinks are correctly installed 9 Some semiconductor solid state devices are easily damaged by static electricity Such compo nents are called Electrostatically Sensitive Devices E...

Page 4: ...DE Control Method Oven TOUCH POP UP FULL TOUCH Display LED LED Cleaning Method Oven PYROLYTIC STEAM STEAM Heater FIXED FIXED Electric Features Oven Temp Ranges Single 30 275 GRILL 100 300 30 275 GRILL 100 300 Upper or Lower 40 250 40 250 Twin 40 250 40 250 Grill Heater In Out 1600W 1100W 1600W 1100W Bottom Heater 1100W 1100W Convection Heater Upper Lower 1200W 1200W 1200W 1200W Energy Class A A Ov...

Page 5: ...S YES 2 Top Heat Convection YES YES 3 Large Grill YES YES Lower Mode 1 Convection YES YES 2 Bottom Heat Convection YES YES 3 Bottom Heat YES YES Twin Mode 1 Upper Convection Lower Convection YES YES 2 Upper Convection Lower Bottom Heat Convection YES YES 3 Upper Convection Lower Bottom Heat YES YES 4 Upper Top Heat Convection Lower Convection YES YES 5 Upper Top Heat Convection Lower Bottom Heat C...

Page 6: ...Temp YES YES Child Lock YES YES Oven Light On Off YES YES Sound On Off YES YES Pyrolytic Cleaning YES NO Steam Cleaning YES YES Catalytic Cleaning YES YES Descaling NO NO Language Option NO NO Wi Fi NO NO Favourites NO NO Meat Probe Cooking NO NO EQUIPMENT SUPPLIED Devider 1EA 1EA Wire rack 1EA 1EA Wire rack insert Baking tray A Baking tray B 2EA 2EA Baking tray C Rotisserie spit 1EA 1EA Shashlik ...

Page 7: ... NEW MODEL Specifications Power source 230 240V 50HZ 230 240V 50HZ Volume usable capacity 75L 75L Output Power 3 650 3 950W ITALY MAX 2850W 3 650 3 950W Weight Net 47 2KG APPROX 42KG APPROX Shipping 50 0KG APPROX 46 5KG APPROX Dimensions W x H x D Outside dimensions 595 595 566 595 595 566 ...

Page 8: ... 6 This document can not be used without Samsung s authorization 2 2 Accessory The following accessories are provided with your oven Description Q ty RACK WIRE 1 Front TRAY BAKING B 2 DEVIDER 1 ...

Page 9: ...river 2 Type 7mm 3 Remarks Heater bracket Nut 1 Tool Nut Driver 2 Type 9mm 3 Remarks Convection Fan Nut 1 Tool Longnose 2 Remarks TCO tube clamp 1 Tool Driver 2 Type 3 Remarks SCREW Control Box LED Display Handle Door Grill Heater Cover casing Gasket Door Door Lamp Lamp Fan Convection Fan Convection 3 Disassembly and Reassembly ...

Page 10: ...xplanation Photo Explanation Door Assembly 1 Turn over the clips of both hinges 2 With both hands grasp the middle sides of the oven door 3 Rotate the door by approx 70degree until the hinges can be taken out completely from the hinges holes 3 1 Replacement of Door Assembly ...

Page 11: ...xplanation Photo Explanation Door Glass 1 Use a screwdriver to remove the screws on the left and right sides 2 Detach the duct door in the arrow directions 3 Remove the inner glass from the door 4 Remove the middle glass from the door in the arrow direction 5 Clean the glass with soapy water and a clean cloth ...

Page 12: ... done reinsert the sheets as follows Insert sheet 2 between support clip 1 and 2 and sheet 1 into support clip 3 in this order 7 Check if the holder rubbers fit into and secure the glass sheet properly 8 Follow steps 1 2 above in the reverse order to reinstall the duct door 3 2 Replacement of Door Glass 3Glass Continued ...

Page 13: ...Top lamp 3 5 Replacement of the side Halogen Lamp Parts Explanation Photo Explanation Halogen Lamp 1 To remove the glass cover hold the lower end with one hand insert a ﬂat sharp implement such as a table knife between the glass and the frame and pop out the cover 2 If necessary replace the halogen bulb with a 25 40 watt 230 240V 300 C heat resistant halogen oven light bulb TIP Always use a cloth ...

Page 14: ...planation Photo Assy Control Box Assy PCB Parts Main PCB Buzzer Assy LED Display Assy PCB Parts Sub PCB 1 Remove 2 Connectors from circled part in the picture 2 Remove 3 screws from the Control Box 3 Pull the control box forward to separate 3 6 Replacement of Assy Control Box ...

Page 15: ... 13 This document can not be used without Samsung s authorization 3 6 Replacement of Assy Control Box Continued ...

Page 16: ...r Parts Explanation Photo Explanation Motor Fan Cooling 1 Remove the Motor Connector 2 Remove 2 screws 3 Turn the Motor toward Clockwise to separate Parts Explanation Photo Explanation Assy Cover Air 1 Remove an Assy Control Box 2 Remove some Connectors 3 Remove 6 screws From the bracket Upper 4 Remove 2 screws to separate Bracket Pipe ...

Page 17: ...ise Lower Clockwise 3 Turn Convection Motor to release a Motor Reference Convection fan is turn in the opposite direction each other for improvement cook performance Upper fan is turn in counterclockwise direction Lower fan is fan turn in clockwise direction therefor convection fan direction and netflange are opposited each other Convection fan is indicated U L and netflange is different the head ...

Page 18: ...t of Heater Convection Twin Parts Explanation Photo Explanation Heater Convection Twin 1 Remove 2 Connectors 2 Remove two screws securing heater convection twin at the rear 2 Pull the securing bracket at the left forward and pull it toward the left to separate heater convection twin ...

Page 19: ... 17 This document can not be used without Samsung s authorization 3 11 Replacement of Thermostat Parts Explanation Photo Explanation Thermostat 1 Unlock or remove screw ...

Page 20: ...hermostat Lower Thermostat Thermostat spec by model Full Touch NV75N7646RS NV75N7646RB NV75N7626RB NV75N7546RB NV75N7546RS Main 130 C with Bracket TCO Upper 150 C Lower 130 C Main 130 C with Bracket TCO Upper 150 C Lower 130 C Main 130 C with Bracket TCO Upper 150 C Lower 130 C Main 130 C with Bracket TCO Upper 150 C Lower 130 C Main 130 C with Bracket TCO Upper 150 C Lower 130 C ...

Page 21: ...hoto Explanation Terminal Block 1 Remove the 3 screws Parts Explanation Photo Explanation Sensor Thermistor 2 Remove one screw 3 Check the rectangular part Themister should be fixed by bracket 4 Close the adiabatic 3 13 Replacement of Sensor Thermistor 3 12 Replacement of Terminal Block ...

Page 22: ...der the Cover bottom heater 3 15 Replacement of Heater Bottom 3 14 Replacement of Heater Grill Parts Explanation Photo Explanation Heater Grill 1 Remove 4 Connectors and Ground Wire 2 Remove each nut frange at right and left sides 3 Turn the nut circular of inside cavity to the Counter Clockwise to release pull heater grill forward to separate 4 There is 1 more adiabatic inside the rectangular par...

Page 23: ...t be used without Samsung s authorization 3 16 Replacement of Assy PCB Parts Main PCB Parts Explanation Photo Explanation Assy PCB Parts Main PCB 1 Remove a screw 2 Separate 2 hook The Assembly is reverse order of disjointing ...

Page 24: ...Rack Wire Support Parts Explanation Photo Explanation Guide Rail Telescopic 1 Separate Guide Rail Telescopic from Side Rack following arrow direction 3 19 Replacement of Guide Rail Telescopic Parts Explanation Photo Explanation Rack Wire Support 1 2 1 Press and pull the Rack wire support ...

Page 25: ...ation 3 20 How to enter the Demo mode Enter the Demo Mode Time set 0 00 and then Press Timer key OK key at the same time for 5 seconds De activate the Demo Mode Press Timer key OK key at the same time for 5 seconds again In Demo mode the heater does not turn on ...

Page 26: ...tion 4 Troubleshooting 4 1 Part Checking method Parts Photo Good No Good T C O 0 1 1 Ω 100 MΩ exceed Convection Motor 100 350 Ω 100 MΩ exceed Heater 10 150 Ω 100 MΩ exceed Fan Motor 100 350 Ω 100 MΩ exceed Sensor 1KΩ 2MΩ 100 MΩ exceed Door lock motor 7 2KΩ 8 8MΩ ...

Page 27: ...hold them for 5 seconds imformation codes are displayed Press OK button the lastest 5 imformation codes can be checked But if the oven turns off the stored imformation codes are deleted Press Fast preheat OK button to return to Normal display mode 4 2 1 Temp Sensor Problem Imformation Code General Function Cause Cavity sensor Open Short Sensor Open Short It occurs due to a defective sensor misplac...

Page 28: ...Time 100 C 16 hours 105 C 240 C 8 hours 245 C 4 hours This code occurs when the oven works during CUT OFF TIME in the same mode and at the same temperature without any operation of an user This error is to prevent a risk of fire and hazards in case an user forgets to turn off the oven after use or the oven automatically starts in an unusual way The oven can be used after off 4 2 2 Safety Problem I...

Page 29: ...in and Check if it is working properly Sensor open case Is the sensor wire connected properly Is the sensor terminal part of the PCB shorted Connect the sensor Remove any foreign substance From the shorted part Does the voltage change as the humidity temperature and weight change Check if the voltage of the GND and sensor changes Using a digital multi meter by forcefully changing the humidity Temp...

Page 30: ...e C d0 Perform the operation again and check if it is working properly S W problem Is a specific key not recognized Is the key recognized intermittently The membrane is defective Replace the Assy control box Is the key not recognized at all After Power On does the symptom continue Replace the PCB 4 2 5 C d0 ...

Page 31: ...e check the Cut Off Time for the corresponding internal temperature Is it temperature 30 100 C in oven Is it temperature 105 C 240 C in oven Is it temperature 245 300 C in oven Does same code arise S W problem S W problem Does same code arise Does same code arise Has it worked for 8 hours continuously Has it worked for 16 hours continuously Has it worked for 4 hours continuously Turn the oven off ...

Page 32: ...nd one more test but if same case Check PCB Main Has the oven internal temperature reached over 350 degrees Is the temperature sensor connectivity normal Turn the oven off and let it cool sufficiently An C 21 Error occurred Reconnect the temperature sensor properly Check and repair the heater drive part if necessary S W Error After Power On does the symptom continue Replace the PCB Perform the ope...

Page 33: ...tion Problem C F0 YES Connect the wire harness B completely YES Connect the wire harness B completely Replace the PCB Rerform the operation again and check if it is working property Is the wire harness B 10pin disconnected Is the SUB PCB connected with MAIN PCB NO Dose the symptom continue NO ...

Page 34: ... Replace PCB or display PCB check YES YES YES Check terminal block voltage 230 240V Reset The circuit braker or Check main power NO TCO open Check main TCO Replace TCO NO Check the input voltage of PCB SMPS input checkpoint 230 240V Repair Faulty wiring NO 4 2 9 Power Failure ...

Page 35: ...ration of a sensor Cooling motor Convection Motor check Motor Connect wire Remove Motor Resistor check Cooling motor 238Ω Convection Motor 218Ω Motor Terminal Voltage check Replace Motor PCB SMPS Input Voltage check input check point 5V 230 240V Repair Faulty wiring PCB SMPS output Voltage check output check point 5V 12C Replace PCB PCB Relay contact short check Replace PCB YES NO NO YES YES NO YE...

Page 36: ...perating base voltage 5V which is appro priate for each relay Reset the circuit braker or check main power Repair Faulty wiring or PCB check Check Terminal block voltage 230 240V Replace Safety Relay Do all relays operate After Lamp On Safety Relay Contact point ON 12V Check the operating Base voltage 0V of Safety Relay Replace PCB YES NO YES NO NO NO Check fuse protecting SMPS Replace PCB YES YES...

Page 37: ...TCO Repair Faulty wiring Possible terminal contact failure Perform PCB Check Process TCO Open Check Relay Terminal Volt age 230 240V Replace heater After removing Heater Wire Check Heater resistance Large G 32 8Ω Small G 48 6Ω Bottom 48 1Ω Conv 44Ω Upper convection heater failure Check heater s terminal voltage 230 240V YES NO YES No YES YES YES NO NO NO 4 2 12 Failure of heating elements ...

Page 38: ... 36 This document can not be used without Samsung s authorization 5 Wiring Diagram ...

Page 39: ... 37 This document can not be used without Samsung s authorization 6 PCB Diagram 6 1 PCB Diagram ...

Page 40: ...Upper Lower lamp Water pump Drain O 24 CNP202 RELAY Connector AC A Terminal for connecting with relay to AC Spit Vent Upper Lower fan Cooling fan O 25 CNS211 RELAY Connector DC A Terminal for connecting with relay to DC Water valve Model option X 26 CNS300 SUB PBA Connector A Terminal for connecting with sub PBA O 27 CNS301 MEAT PROBE Connector A Terminal for for connecting with meat probe O 28 CN...

Page 41: ... 39 This document can not be used without Samsung s authorization 6 2 PCB Diagram Heater Relay Display SMPS ...

Page 42: ...TWORK Area Web Site Europe CIS Mideast Africa gspn1 samsungcsportal com Asia gspn2 samsungcsportal com North Latin America gspn3 samsungcsportal com China china samsungportal com Samsung Electronics Co Ltd July 2018 Printed in Korea ...

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