Page 1
Internal Use Only Website http://biz.lgservice.com 30” Freestanding Electric Range SERVICE MANUAL MODEL: LDE3017ST LDE3017SB LDE3017SW CAUTION BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. July, 2010 P/NO : MFL37118315 Printed in Korea...
SAFETY PRECAUTIONS • Repairs of the appliance should be carried out by a licensed technician only. Incorrect repairs may result in dangerous situations. If you need repairs, contact an LG Service Center or your dealer. • If the power cord is defective, it must be replaced by a qualified service agent with a UL listed range cord.
GENERAL IMPOR ANT SAFETY INSTRUCTIONS IMPOR ANT SAFETY INSTRUCTIONS Read and follow all instructions before using your oven to prevent the risk of fire, electric shock, injury to person, or damage when using the range. This guide don’t cover all possible conditions that may occur. For further assistance contact your service agent or manufacturer.
Page 6
GENERAL IMPOR ANT SAFETY INSTRUCTIONS IMPOR ANT SAFETY INSTRUCTIONS • Be sure your appliance is properly installed and grounded by a WARNING qualified technician. • Do not repair or replace any part of the appliance unless • DO NOT touch heating elements or specifically recommended in the manual.
GENERAL IMPOR ANT SAFETY INSTRUCTIONS IMPOR ANT SAFETY INSTRUCTIONS • Do Not Leave Children Alone - Children should not be left alone or SELF-CLEAN OVENS unattended in area where appliance is in use. They should never be • Do Not Clean Door Gasket – The door gasket is essential for a allowed to sit or stand on any part of the appliance.
GENERAL MODEL & SERIAL NUMBER LABEL MODEL & SERIAL NUMBER LABEL AND TECH SHEET LOCA TIONS AND TECH SHEET LOCA TIONS The Model/Serial Number label and Tech Sheet locations are shown below. Model & Serial Number Location Tech Sheet Location (On Low Rear Cover)
Page 9
GENERAL SPECIFICA TIONS SPECIFICA TIONS Model Number LDE3017ST / LDE3017SB / LDE3017SW Category Double oven range Overall Width 30" Installation type Freestanding Color availability Control Oven Glass touch Cooktop Glass touch Display Scroll VFD Electronic clock & timer Control lock capability...
USING YOUR RANGE GENERAL INFORMA TION GENERAL INFORMA TION Upper oven Rating Label Broil element Model numbers are recorded on the rating label. Rating label is located on the upper front left corner of the upper oven frame. It can be seen by opening the upper oven door.
USING YOUR RANGE CONTROL P ANEL FEA TURES CONTROL P ANEL FEA TURES single single 11 12 Warming zone Left Rear element Right Rear element 19 20 LOCKOUT 16 17 18 21 22 9 10 Select Indicator Double Double Left Front element Right Front element UPPER OVEN LOWER OVEN...
Page 12
USING YOUR RANGE CONTROL P ANEL FEA TURES CONTROL P ANEL FEA TURES COMMON FUNCTION Single element : Left Rear, Right Rear Indicator CLOCK : Use to set the time of day. SETTING : Use to set the time of day. Double element : Left Front, Right Front Indicator START TIME : Use to set delay time.
USING YOUR RANGE To turn on a SINGLE surface unit 3. TO TURN ON/OFF THE OVEN LIGHT (Left Rear, Right Rear) (For both the Upper & Lower oven) The oven light automatically turns ON when the 1. Press ON/OFF pad for the desired element door is opened.
USING YOUR RANGE To decrease the oven temperature 6. TIMED COOK, DELAYED TIMED COOK For the Lower oven temperature adjustment. (For the Upper & Lower Bake, Lower CONV. 1. Press SETTING pad 2 times for the lower Bake & Roast) oven, “L-Aj”...
USING YOUR RANGE 11.WARM(For both the Upper & Lower oven) 15. LOCKOUT (For the Upper & Lower Door lock, WARM Oven & Cooktop control lock) Upper oven START Press and hold the START pad 3 seconds (In order to activate or deactivate LOCKOUT) WARM/PROOF Once WARM...
COMPONENT ACCESS This section instructs you on how to service each component inside the range. The components and their locations are shown below. COMPONENT LOCA TIONS COMPONENT LOCA TIONS Display SMPS Cooktop PCB Oven PCB Surface Elements Upper Broil Heater Oven Sensor Upper Door Latch Door Locking Motor...
COMPONENT ACCESS REMOVING THE BACK, CONTROL COVER REMOVING THE BACK, CONTROL COVER AND KEY MEMBRANE ASSEMBL AND KEY MEMBRANE ASSEMBL 6. Remove the 4 screws of the cook-top display PCB WARNING from the controller sub assembly. • DISCONNET power supply cord from the outlet before servicing.
COMPONENT ACCESS REMOVING THE CONTROL POWER SUPPL REMOVING THE CONTROL POWER SUPPL AND POWER CONTROL BOARD (PCB) AND POWER CONTROL BOARD (PCB) 4. There are 3 PCB's (power control board). When WARNING you check PCB, check the proper pcb in default mode and check main pcb.
Page 19
COMPONENT ACCESS REMOVING THE SURF ACE ELEMENTS REMOVING THE SURF ACE ELEMENTS AND THE CERAMIC GLASS COOKT AND THE CERAMIC GLASS COOKT Step. 5 WARNING Protect the cooktop surface • DISCONNET power supply cord and turn the assembly over. from the outlet before servicing. •...
Page 20
COMPONENT ACCESS REMOVING THE DOOR LA TCH & UPPER DOOR SWITCH REMOVING THE DOOR LA TCH & UPPER DOOR SWITCH (For the Upper oven only) (For the Upper oven only) 5. To remove the upper door switch: WARNING a) If not already done, raise the cooktop (see page 3-4 for the procedure).
Page 21
COMPONENT ACCESS REMOVING THE DOOR LA TCH & LOWER DOOR SWITCH REMOVING THE DOOR LA TCH & LOWER DOOR SWITCH (For the Lower oven only) (For the Lower oven only) b) Remove 4 screws to detach 2 hinge suppoters. WARNING •...
Page 22
COMPONENT ACCESS f) Pull out the Lower latch from the bar. Unhook Actuating 5. To remove the lower door switch: a) If not already done, raise the cooktop (see page 3-4 for the procedure). b) Remove the lower door switch from the range. To do this, squeeze tabs and use a ratchet extension or a small socket, and tap it out of the hole with a hammer.
COMPONENT ACCESS REMOVING THE BROIL ELEMENT REMOVING THE BROIL ELEMENT 4. Remove 6 screws. WARNING Pull the Upper broil element assembly forward so that you can access connectors and • DISCONNET power supply cord disconect wires. from the outlet before servicing. •...
Page 24
COMPONENT ACCESS 6. Remove the glass tube holder by pushing 8. Turn the element assemblly upside down. aside both side tabs. Remove 2 screws to detach the mesh. 2 screws 2 screws 2 screws 2 screws 2 screws 2 screws 2 screws 2 screws 2 screws...
Page 25
COMPONENT ACCESS REMOVING THE BROIL ELEMENT REMOVING THE BROIL ELEMENT (For the Lower oven) (For the Lower oven) b) Pull the element forward so that you can WARNING access the terminals and disconnect the wires. • DISCONNET power supply cord Terminals from the outlet before servicing.
COMPONENT ACCESS REMOVING THE EXPOSED BAKE ELEMENT REMOVING THE EXPOSED BAKE ELEMENT (For the Upper oven only) (For the Upper oven only) b) Pull the element forward so that you can WARNING access the terminals and disconnect the wires. • DISCONNET power supply cord Terminals from the outlet before servicing.
COMPONENT ACCESS REMOVING THE HIDDEN BAKE ELEMENT REMOVING THE HIDDEN BAKE ELEMENT (For the Lower oven only) (For the Lower oven only) 1. Unplug range or disconnect power. 7. Bend the insulation glass fiber up. 2. Pull the range out of its mounting location so that you can access the rear of the unit.
COMPONENT ACCESS REMOVING THE CONVECTION ELEMENT AN BLADE AND F AN MOT REMOVING THE CONVECTION ELEMENT AN BLADE AND F AN MOT (For the Lower oven only) (For the Lower oven only) 1. Disconnect power and remove oven racks. 7. To remove Fan blade, remove Nut by screwing clockwise.
COMPONENT ACCESS REMOVING THE OVEN LIGHT & SOCKET ASSEMBL REMOVING THE OVEN LIGHT & SOCKET ASSEMBL (For both the Upper & Lower oven) (For both the Upper & Lower oven) WARNING CAUTION • DISCONNET power supply cord • Be careful not to scratch or chip the from the outlet before servicing.
COMPONENT ACCESS REMOVING THE LA TCH DRIVE ASSEMBL REMOVING THE LA TCH DRIVE ASSEMBL (For both the Upper & Lower oven) (For both the Upper & Lower oven) DOOR LOCKING MECHANISM WARNING The door lock assembly is located at the back side •...
COMPONENT ACCESS REMOVING THE OVEN TEMPERA TURE SENSORS REMOVING THE OVEN TEMPERA TURE SENSORS (For both the Upper & Lower oven temperature sensor) (For both the Upper & Lower oven temperature sensor) 5. To remove an oven temperature sensor, WARNING disconnect the connector from the main harness and remove the two mounting screws in oven •...
COMPONENT ACCESS REMOVING & REPLACING THE LIFT -OFF OVEN DOOR REMOVING & REPLACING THE LIFT -OFF OVEN DOOR (For the Upper door) (For the Upper door) To replace the door: CAUTION Step. 1 • Be careful when removing and Be sure both hinges are lifting the door.
Page 33
COMPONENT ACCESS REMOVING & REPLACING THE LIFT -OFF OVEN DOOR REMOVING & REPLACING THE LIFT -OFF OVEN DOOR (For the Lower door) (For the Lower door) To replace the door: CAUTION Step. 1 • Be careful when removing and Firmly grasp both sides of the door at the top. lifting the door.
COMPONENT ACCESS REMOVING THE UPPER OVEN DOOR HANDLE & GLASS (For the Upper door) REMOVING THE UPPER OVEN DOOR HANDLE & GLASS (For the Upper door) 6. To remove the door handle & trim (for Stainless model) WARNING a) Remove the 4 door handle screws and lift the door handle off door trim and slide up the door trim.
Page 35
COMPONENT ACCESS 7. To remove a hinge receptacle assembly: c) Lift the inner oven door glass and bracket a) Remove the 4 top liner screws assembly out of the door liner. (See step 3 on page 3-19) b) Place the door liner assembly on a padded work surface with the hinge receptacles over the edge.
COMPONENT ACCESS REMOVING THE OVEN DOOR HANDLE & GLASS (For the Lower door) REMOVING THE OVEN DOOR HANDLE & GLASS (For the Lower door) 6. To remove the door handle & trim (for Stainless model) WARNING a) Remove the 4 door handle screws and lift the door handle off door trim and slide up the door trim.
Page 37
COMPONENT ACCESS 7. To remove a hinge hanger assembly: d) Lift the inner oven door glass and bracket a) Remove the 2 top liner screws assembly out of the door liner. (See step 3 on page 3-14) b) Place the door liner assembly on a padded work surface with the hinge hangers over the edge.
COMPONENT ACCESS REMOVING THE OVEN DOOR GASKET REMOVING THE OVEN DOOR GASKET (For the Upper &Lower door gaskets) (For the Upper &Lower door gaskets) 3. Pull the ends of the gasket out of the liner holes. WARNING Liner Hole • DISCONNET power supply cord from the outlet before servicing.
COMPONENT ACCESS REMOVING A SIDE P ANEL REMOVING A SIDE P ANEL 7. Remove the two screws from the left or right side WARNING panel. • DISCONNET power supply cord from the outlet before servicing. • Replace all panels and parts before operating.
COMPONENT TEST Before testing any of components, perform the following checks: NOTE: 1. The most common cause for control failure is corrosion on connectors. Therefore, disconnecting and reconnecting wires will be necessary throughout test procedures 2. ALL units in the first few days of use should be checked for mis-wiring or loose connections 1.
Components Test procedures Results Normal: Approximately Door locking Motor 1. Refer to page 3-15 for the servicing procedure 2.6 kΩ ± 10% 2. Measure the resistance If not replace (Multiple meter scale: R x 1000) Abnormal: Infinite(open) below 5Ω (shorted) Micro Switch ON position (Unlock position) OFF position (Lock position)
Components Test procedures Results Door switch 1. Refer to page 3-5 for the servicing procedure Door open Door closed 2. Measure the resistance after cooling down (Multiple meter scale: R x 1) Continuity Infinite Normal: Below 5 Ω. Oven lamp 1.
Components Test procedures Results Normal : Approximately 26.6Ω Upper oven 1. Remove wire leads Bake heater Abnomal : Infinite(opened) 2. Measure resistance after cooling down NOTE: Ω Value was tested at room temperature (77F/25˚C) Be careful the element is sensitive to temperature. Lower oven Normal : Approximately 14.7Ω...
Components Test procedures Results Normal: Approximately 120V Appliance outlet 1. Test for voltage 2. If no voltage is present at outlet, Press the switch of located on the control console NOTE: The circuit breaker for the appliance outlet is rated for 15A, That may trip if the appliance plugged into it exceeds 15amps.
Components Test procedures Results Single surface units: 1. Refer to page 3-4 for the servicing procedure Left Rear(LR) 2. Set the Multiple meter scale to the R x 1 Right Rear(RR) 3. Disconnect wires from cook-top elements Element 4. Touch the ohmmeter test leads to the element terminal and 1A.
Components Test procedures Results Dual surface unit: 1. Refer to page 3-4 for the servicing procedure Left Front(LF) 2. Set the Multiple meter scale to the R x1 Element 3. Disconnect wires from cook-top elements 4. Touch the ohmmeter test leads to the (E1 & 1A) and (E2 &...
Components Test procedures Results Dual surface unit: 1. Refer to page 3-4 for the servicing procedure Right Front(RF) 2. Set the Multiple meter scale to the R x1 Element 3. Disconnect wires from cook-top elements 4. Touch the ohmmeter test leads to the (E1 & 1A) and (E2 &...
Components Test procedures Results Center Rear(CR) 1. Refer to page 3-4 for the servicing procedure Element 2. Set the Multiple meter scale to the R x 1 : Warming Zone 3. Disconnect wires from CR elements (Plane Heater) 4. Touch the ohmmeter test leads to the between element terminal.
CHECK THE FAILURE CODE (F-code) ■ When the oven has some failure on cooking - Oven may stop operating and F-code will display in display window. - Some F-codes display immediately(F-3,F-9,F-19), but other codes will store in EEPROM memory and not displayed ■...
SAFETY CAUTION & ERROR CODE SUMMARY 1.1 Safety Caution • Unless SVC manual indicate that ‘power is on’, normal state is power off. 1.2 Error Code Summary Code Description Operation Opened Sensor Upper Oven Thermistor remains open for over 1 min, after cook starts during cooking.
CHECKING FLOW CHART BY FAIRURE Symptom Check Point 1. Power Failure 1. Check Electric Wiring (Dead) 2. Check the thermostat 2. No Display 3. Check the SMPS PCB...
CHECKING FLOW CHART BY FAIRURE No Display (No Power) Control Dead Check AC input of SMPS PCB - SMPS PCB CN1 (pin 1 and 3) Select a function Any beeping Sound? Replace the Oven system PCB (EBR64624502) 120V AC? Normal? Replace the DISPLAY Replace the SMPS PCB (EAJ61309901)
Page 57
CHECKING FLOW CHART BY FAIRURE No Display (No Power) Check thermostat Normal? Check the connection of L1 and N Replace thermostat from power inlet. Normal? Fix or replace the lead wire...
Page 58
CHECKING FLOW CHART BY FAIRURE No Display (No Power) Check and fix the connection 1. between Cooktop SYSTEM and SMPS PCB, 2. between Cooktop SYSTEM and Oven system PCB, 3. between DISPLAY and Oven system PCB, Normal? Replace the Oven SYSTEM PCB (EBR64624502)
Page 59
CHECKING FLOW CHART BY FAIRURE Symptom Check Point 1. No heating 1. Check Electric Wiring 2. F-9 2. The Heater’s Resistance. 3. F-19 3. Check the Sensor (thermistor). Heater resistor Check the sensor...
CHECKING FLOW CHART BY FAIRURE Oven does not heat (including F-9, F-19 Error) No heating Disconnect power Check the electric wiring 1. Harness of Relay connection. 2. Each heater’s connection. 3. System and Relay PCB connection(CN11, CN12) UPPER LOWER Harness connection check Normal? Fix or replace the lead wire...
Page 61
CHECKING FLOW CHART BY FAIRURE Oven does not heat (including F-9, F-19 Error) Measure the Resistor of each heater Between the DLB Relay’s L2 and each heater Relay’s Harness point of Figure 1 (measure the resistance after cooling down) UPPER Normal Resistor upper Bake...
Page 62
CHECKING FLOW CHART BY FAIRURE Oven does not heat (including F-9, F-19 Error) Normal? Replace the error heater Connect the power Check the value of thermistor by using the test mode • To enter the testmode, follow these steps: 1. press the “clear” key 2.
Page 63
CHECKING FLOW CHART BY FAIRURE Oven does not heat (including F-9, F-19 Error) Normal? Disconnect the oven sensor and check the value (measure the resistance after cooling down) Normal:approximately 1.06 kΩ at 65°F ~ 1.12 kΩ at 85°F. Normal? Replace the oven sensor Replace the Relay PCB (EBR64624601) Replace the Oven SYSTEM PCB...
Page 64
CHECKING FLOW CHART BY FAIRURE Symptom Check Point 1. Cooktop Not 1. Check Electric Wiring working 2. Check the Heater resistance 9-10...
CHECKING FLOW CHART BY FAIRURE Cook-top does not heat No heating (All or a part of cook-top heaters) Disconnect power Check the loose connection cook-top heater and harness Normal? Reconnect. If defective harness,replace or fix Check the loose connector (SMPS PCB and Cooktop PCB) Normal? Reconnect.
Page 66
CHECKING FLOW CHART BY FAIRURE Cook-top does not heat Check the cook-top heaters (measure the resistance between CN10, CN11, CN12, TAB11, TAB09 and SMPS CN1 pin 3) Normal : approximately 100Ω 9-12...
Page 67
CHECKING FLOW CHART BY FAIRURE Cook-top does not heat Normal? Replace the Cook-top heater Replace the cooktop system (EBR64624802) 9-13...
Page 68
CHECKING FLOW CHART BY FAIRURE Symptom Check Point 1. Door Lock System 1. Check the Electric wiring Failure 2. Check the Motor’s Resistance 2. F-10, F-20 9-14...
CHECKING FLOW CHART BY FAIRURE Door lock system error F-10, F-20 Error Just after self-clean start,the door lock motor starts to rotate. During that time if the door lock switch does not operate properly after rotating twice, then supervising circuit detects a Door Lock failure and the F-10, F-20 error code appears.
Page 70
CHECKING FLOW CHART BY FAIRURE Door lock system error F-10, F-20 Error Check the door locking motor (measure the resistance) normal: approximately 2.6 kΩ abnormal: infinite or below 5 Ω Normal? Replace the door Check the looseness of CN08 locking motor Normal? Reconnect 9-16...
Page 71
CHECKING FLOW CHART BY FAIRURE Door lock system error F-10, F-20 Error Check the Relay PCB’s electric connection (CN01, CN03) Check the connection between system PCB and relay PCB(CN11, CN12) Normal? Reconnect Replace the Oven Relay PCB (EBR64624601) Normal? Replace the Oven SYSTEM PCB (EBR64624502) 9-17...
Page 72
CHECKING FLOW CHART BY FAIRURE Symptom Check Point 1. Sensing Fail 1.Check the electric wiring 2. F-1 2.Check the test Mode 3. F-2 3.Check the sensor(thermistor) resistance 4. F-4 (approximately 1.06 kΩ at 65°F ~ 1.12 kΩ at 85°F.) 5. F-5 9-18...
CHECKING FLOW CHART BY FAIRURE Oven sensing error F-1, F-2, F-4, F-5 error Main oven sensing failed Connect the power Check the value of thermistor by using the test mode • To enter the testmode, follow these steps: 1. press the “clear” key 2.
Page 74
CHECKING FLOW CHART BY FAIRURE Oven sensing error F-1, F-2, F-4, F-5 error Normal? Disconnect the oven sensor and check the value (measure the resistance after cooling down) Normal:approximately 1.06 kΩ at 65°F ~ 1.12 kΩ at 85°F. Normal? Replace the oven sensor Replace the Oven Relay PCB (EBR64624601) Replace the Oven SYSTEM PCB...
Page 75
CHECKING FLOW CHART BY FAIRURE Symptom Check Point 1. Oven hot 1. Check the Resistance of the Relay. 2. F-6 3. F-16 Check the resistance of relays 9-21...
CHECKING FLOW CHART BY FAIRURE Oven hot error F-6, F-16 error Oven is hot (F-6, F-16) Disconnect the power and oven sensor. Check the oven sensor value (measure the resistance after cooling down) Normal:approximately 1.06 kΩ at 65°F ~ 1.12 kΩ at 85°F Normal? Replace the oven sensor Remove the relay PCB harness...
Page 77
CHECKING FLOW CHART BY FAIRURE Oven hot error F-6, F-16 error Normal? Replace the Relay PCB (EBR64624601) Replace the Oven SYSTEM PCB (EBR64624502) 9-23...
CHECKING FLOW CHART BY FAIRURE No key input Or F-3 Key does not input(including F-3) If the key error occurred in the oven VFD, check the oven system. If the problem happened the cooktop LED, Check the cooktop system. Check the connection between Oven system PCB’S CN03,cooktop systme PCB’s CN21 Normal? Reconnect Remove Harness and check F-3 error...
CHECKING FLOW CHART BY FAIRURE F-11 error (communication error) F-11 error Check the connection between MAIN PCB’S CN06 and SYSTEM PCB’S CN13 This Harness Normal? Reconnect Replace the Oven SYSTEM PCB (EBR43296802) Reset failure log and Check the F-code. 1. press the “clear” key 2.
TROUBLE SHOOTING PROBLEMS POSSIBLE CAUSES & FAULTS SOLUTIONS Oven not operating. • Bad power control board (PCB) • Test and/or replace PCB ➞ Refer to the page 6-1~6-4 • Power outage • Verify power is present at unit. • Verify that the circuit breaker is not tripped •...
Page 81
TROUBLE SHOOTING PROBLEMS POSSIBLE CAUSES & FAULTS SOLUTIONS Electronic timer will not • Failed main power control board • Replace power control board(PCB) accept Programming. Electronic timer will not • Failed main power control board • Replace power control board(PCB) accept Programming.
Page 82
TROUBLE SHOOTING PROBLEMS POSSIBLE CAUSES & FAULTS SOLUTIONS Oven door sagging on one • Hinge loose or out of position to • Adjust hinges or replace hinges side oven liner Door does not close • Broken or misadjusted door spring •...
SCHEMATIC DIAGRAM WARNING • DISCONNET power supply cord from the outlet before servicing. • Replace all panels and parts before operating. • RECONNECT all grounding devices. - Failure to do so can result in severe personal injury, death or electrical shock. RADIANT COOK-TOP Wattage RR:1200W...
STRIP CIRCUITS STRIP CIRCUITS Complete the following steps before checking electric oven circuit : 1.Check the line voltage, household fuse or circuit breaker. 2.Check for loose wiring or mis-wiring within electric range. NOTE: The following individual circuits are for use in diagnosis, and are shown in the ON position. UPPER BAKE/WARM LOWER BAKE/CONV BAKE/CONV ROAST 11-2...