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GE JK3800DH1BB, Technical Service Manual

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GE JK3800DH1BB Technical Service Manual Download Page 65

– 65 –

Cooling Fan Motor Reinstallation

1.  Reinstall the four screws to secure the blower 

motor assembly to the frame.

2.  Reinstall the eight screws securing the top cover 

DQGWKH¿YHUHPDLQLQJVFUHZVRQWKHULJKWVLGH

fan motor cover.

3.  Reinstall the ten screws on the back panel.

FAD Board

The FAD board replaces the older version of the 

monitoring cooling fan operation, which was 
thermally operated. The FAD board is a small sensor 
that provides speed feedback to the ERC. There are 
no resistance checks available for this board, only 
DC voltage checks.

•  Check for DC supply voltage at the upper FAD 

board.

• 5 

VDC 

black to white.

• Blue to white is signal to control.

FAD Board Removal

Unplug the connector and remove one T10 Torx 

screw that secures the board to the motor assembly.

L2 High Limit Switch

A safety thermostat is used in the event of a thermal 

runaway (example: welded relay contacts).  It will 
open the L2 circuit to all the elements. 

Summary of Contents for JK3800DH1BB

Page 1: ...Oven Technical Service Guide March 2015 GE Appliances 27 JK3800DH1BB JK3800DH1WW JK3800SH1SS JK3800DH2BB JK3800DH2WW JK3800SH2SS 30 JT3800DH1BB JT3800SH1SS JT3800DH2BB JT3800SH2SS PT7800DH1BB PT7800D...

Page 2: ...G To avoid personal injury disconnect power before servicing this product If electrical power is required for diagnosis or test purposes disconnect the power immediately after performing the necessary...

Page 3: ...nformation 17 Oven Controls 3800 Series 18 Oven Controls 7800 Series 20 Oven Controls 9800 Series 22 Oven Settings 24 Oven Options 25 Lower Oven Cooking Modes 27 Sabbath Mode 29 LU RZ 31 Speedcook Ope...

Page 4: ...Switch Assemblies 50 Noise Filter 53 Surge Board 54 Capacitor and Diode 54 Cavity Light 55 Proof Feature Upper oven 55 Microwave Leak Test 56 Standard Test Load 56 Demo Mode 57 Schematic Diagram 58 L...

Page 5: ...5 Convection Element 69 Diagnostics 70 Software Versions Fault Codes 70 Troubleshooting Lower Oven 71 Accessing Machine Control Board Bridge Board 72 Service Mode 74 GE Wall Oven Warranty 76...

Page 6: ...y Glasses Prescription Safety Glasses Safety Glasses must be ANSI Z87 1 2003 compliant Brazing Glasses Cut Resistant Sleeve s Prior to disassembly of the oven to access components GE Factory Service t...

Page 7: ...FACES ARCING WEAR AND OTHER DAMAGE 4 DAMAGE TO OR LOOSENING OF HINGES AND LATCHES 5 EVIDENCE OF DROPPING OR ABUSE D BEFORE TURNING ON MICROWAVE POWER FOR ANY TEST OR INSPECTION WITHIN THE MICROWAVE GE...

Page 8: ...o side panels on some models Latch Assembly New design enables door latch pawl to be unlatched if unit fails in LOCKED mode Speedcook Oven Delivers oven quality food up to four times faster than a con...

Page 9: ...added Bridge Board is used to communicate between the upper and lower ovens For Microwave or Advantium service the upper oven is a module that can be slid out for service Service harness extension Par...

Page 10: ...QG HDU RI PDQXIDFWXUH 7KH OHWWHU GHVLJQDWLQJ the year repeats every 12 years Example LA123456S June 2013 A JAN D FEB F MAR G APR H MAY L JUN M JUL R AUG S SEP T OCT V NOV Z DEC 2024 Z 2023 V 2022 T 20...

Page 11: ...ing The insulation of these three leads is rated for temperatures much higher than the temperature rating of the household wiring The current carrying capacity of the conductor is governed by the wire...

Page 12: ...ecial Tools No special tools are required to service these units Upper oven screws are primarily Phillips head and lower oven screws are 1 4 in hex head or T20 The screw mounting the fad board on the...

Page 13: ...g the upper oven outside of enclosure use the Service Harness Extension WX05X24267 This 6 foot cable consists of a 2 wire communications cable along with a 3 wire AC cable Service Harness Extension Lo...

Page 14: ...terface plugs directly into the Glass Touch assembly Thermal Limit Switch These temperature operated switches provide a safety back up in case of a thermal run away All are one shot and will need repl...

Page 15: ...5 cm min 25 1 4 64 1 cm max 28 1 2 72 4 cm min 28 5 8 72 7 cm max C Cutout Height 41 1 8 104 5 cm min 41 1 4 104 8 cm max 42 3 16 107 2 cm min 42 1 4 107 3 cm max D Overlap of Oven Over Side Edges of...

Page 16: ...HV DQG FRQWURO SDQHO DUH DJDLQVW WKH cabinet frame Make sure that the oven is centered in the opening Open the door place a turntable tray in the oven and make sure that the tray in the unit is level...

Page 17: ...17 Owner s Manuals Information Owner s Manuals available on website 49 80737 JK3800 49 80737 JT3800 49 80738 PT7800 49 80741 PT9800...

Page 18: ...ation about both the upper and lower ovens is shown in this display window Upper Oven Controls 7 Microwave Press the Microwave pad for microwaving options Use the selector dial to QG WKH PLFURZDYLQJ R...

Page 19: ...press to select 15 Broil Press the Broil pad to broil rotate selector dial to select Hi Lo and press to select 16 Options Find the Delay Start Proof Sabbath Self Clean Steam Clean and Warm features un...

Page 20: ...lay Information about both the upper and lower ovens is shown in this display window Upper Oven Controls 7 Microwave Press the Microwave pad for microwaving options Use the selector dial to QG WKH PLF...

Page 21: ...lay Start Probe Proof Sabbath Self Clean Steam Clean and Warm features under this selection See the Oven Options section for more details 17 Convection Bake Press the Convection Bake pad to convection...

Page 22: ...features 6 Display Information about both the upper and lower ovens is shown in this display window Upper Oven Controls 7 Microwave Press the Microwave pad for microwaving options Use the selector dia...

Page 23: ...ate selector dial to select Hi Lo and press to select 16 Options Find the Delay Start Probe Proof Sabbath Self Clean Steam Clean and Warm features under this selection See the Oven Options section for...

Page 24: ...t be set Display Mode Use this feature to set Power Saver or Display Always On display mode Auto Conversion 8VH WKLV IHDWXUH WR WXUQ XWR RQYHUVLRQ RQ R When Auto Conversion is on it will automatically...

Page 25: ...ed Broil Use this feature to broil Remember to use the metal tray and metal rack See Upper Oven Baking Broiling and Toasting section for more detail Proof Use this feature to proof bread See the 8SSHU...

Page 26: ...when a button is pressed but will still beep if certain oven faults occur and all upper oven functions and lower oven functions except lower oven Bake During Sabbath mode only lower oven Bake is avail...

Page 27: ...d press to enter then press Start Always preheat when using this mode The new oven has a variety of cooking modes to help get the best results These modes are described below Refer to the Cooking Guid...

Page 28: ...ctor dial to select Proof and press to select then press Start Cover dough well to prevent drying out Bread will rise more rapidly than at room temperature Note that for double wall ovens proof cannot...

Page 29: ...UI Key Temp F Left Side Keys Upper Oven Microwave 170 F Speedcook Defrost 200 F Cooking Options Popcorn 225 F Add 30 Sec 250 F Convection Bake Reheat 300 F Right Side Keys Lower Oven Back 0 F OHDU 2...

Page 30: ...prompt to close the door 6 DO NOT open the upper oven door Doing so will turn the light on immediately 7 DO NOT press any additional buttons on the lower oven controls once started or the display will...

Page 31: ...the top oven which includes the oven vent discharge down the back and out through the bottom of lower oven A typical air pattern of convection and Speedcook upper ovens The lower oven uses the single...

Page 32: ...f the food while sealing LQ PRLVWXUH DQG DYRU 7KHVH KHDWHUV RQO RSHUDWH LQ the Speedcook mode and always cycle on and cycle R DW WKH VDPH WLPH The convection heater located at the rear of the oven ope...

Page 33: ...ount of time the upper and lower heaters are on during each 32 second duty cycle At the start of each new Speedcooking operation the cavity thermistor reads the oven temperature and sends this informa...

Page 34: ...beyond the door removal position Damage to the inner door panel will occur To remove the door open the door fully and insert a door removal tool Part WB01X10364 in each door hinge opening The door can...

Page 35: ...ly 1 Remove the two 1 4 in screws from the mounting and slide the upper oven out 6 inches 2 Remove the three Phillips head screws from the top front of the outer cover 3 Remove the two recessed Philli...

Page 36: ...36 Control Boards and Panel Connections Upper Oven Control Advantium Upper Oven Control Microwave Continued next page...

Page 37: ...nsor CN6 Door Secondary Sensing Switch and Damper Door Sensing Switch CN8 Thermistor CN11 Relay Board CN15 Lower Oven Communication Signal CN17 Control Board CN18 Control Board Control Boards and Pane...

Page 38: ...e Motor CN3 Control Board CN11 Power Supply Board RY2 High Voltage Transformer NA RY7 Convection Heater RD RY8 Upper Heater Ceramic BL RY9 Lower Heater YL RY11 Upper Heater Halogen WH RY13 Double Line...

Page 39: ...39 Display Board CN1 to Control Board CN10 Keypanel and Encoder Board CON3 to Control Board CN102 CN15 Encoder Board to Control Board CN15 Continued next page...

Page 40: ...N3 To Relay board CN3 CN10 To Display board CN1 CN13 No Connections CN15 To Encoder board CN17 To Power Supply board CN17 CN18 To Power Supply board CN18 CN101 No Connections CN102 To Keypanel CON 3 C...

Page 41: ...he four Phillips head screws that attach the power board to the control panel bracket 4 Lift the power board to clear the retaining tabs Relay Board Removal 1 Remove the control panel See the Control...

Page 42: ...trim between the upper and lower oven and remove the vent trim For 30 Models Only 1 Remove the three 1 4 in hex head screws from each of the two shipping brackets remove the shipping brackets Brackets...

Page 43: ...in place by a single Phillips head screw Both TCO s open at 293 F and cannot be reset Upper Heater TCO Oven Cavity TCO Lower Heater Assembly The lower ceramic heater has an approximate UHVLVWDQFH YDO...

Page 44: ...n is dry No sensor cooking is available for 5 minutes immediately after Speedcook 1 Access the control panel 2 Disconnect the humidity sensor wire harness from the power board at location CN5 3 On the...

Page 45: ...e are Red Blue 400k Red White 290k Blue White 110k Convection Heater Assembly Shown with Rear Cover Removed Upper Heater Assembly The halogen heater has an approximate resistance YDOXH RI WR RKP W LV...

Page 46: ...t senses too much heat The blower will DXWRPDWLFDOO WXUQ R ZKHQ WKH LQWHUQDO SDUWV DUH cool It may stay on for 30 minutes or more after the RYHQ FRQWURO LV WXUQHG R The blower motor has an approximate...

Page 47: ...d screws that hold the blower housing to the bracket NOTE When installing the blower assembly ensure WKDW WKH OWHU JURXQG ZLUH LV VHFXUHG WR WKH RYHQ chassis Convection Heater Element The convection h...

Page 48: ...illips head screws Damper Assembly The damper assembly is on the top right side of the oven cavity When the damper door is closed moisture is retained in the oven cavity When the damper door is open m...

Page 49: ...ge by placing insulated pliers between the diode connection of the capacitor and the oven chassis ground NOTE The capacitor has an internal discharge resistor that automatically discharges the capacit...

Page 50: ...ce with four Phillips head screws Two of the screws are recessed from the top of the outer cover Access holes are provided A magnetic screwdriver is necessary to capture these screws When disconnectin...

Page 51: ...ower and partially remove the oven from its installation See the Removing Upper Oven section in this guide 2 Remove the single Phillips head screw that holds the right side door switch access cover to...

Page 52: ...itch operation 1 Disconnect power and partially remove the oven from its installation See the Removing Upper Oven section in this guide NOTE Each latch board is held in place and adjusted with two Phi...

Page 53: ...the latch board Noise Filter 7KH QRLVH OWHU LV ORFDWHG LQ IURQW RI WKH EORZHU assembly on the right side of the oven The noise OWHU LV KHOG LQ SODFH E D VLQJOH 3KLOOLSV KHDG VFUHZ DQG WDEV VHFXULQJ LQ...

Page 54: ...n the capacitor is discharged before servicing Mechanically discharge by placing insulated pliers between the diode connection of the capacitor and the oven chassis ground NOTE The capacitor has an in...

Page 55: ...nd interior lamp come on immediately and stay on There is an immediate start up burst about 1 5 second duration at 75 F ambient of heat from the convection heater The convection fan and interior lamp...

Page 56: ...surement and meter accuracy Inform the manufacturer of any oven found to have emission in excess of 5 MW CM2 Make repairs to bring the unit into compliance at no cost to the owner and try to determine...

Page 57: ...rs mag HVT or inrush relays while the control is in sales mode The Demo mode is accessed by pressing and holding START and BACK at the same time for 3 seconds during power up this can be done while th...

Page 58: ...58 Schematic Diagram...

Page 59: ...R RI WKH EUDFHV Oven Removal Servicing the cooling fan motor wiring high limit thermostat convection motor and bake element mounting screw are only accessible with the oven removed 1 Disconnect power...

Page 60: ...nge Assembly Handle After separating the door panels remove the two 1 4 in screws that hold the handle onto the outer door assembly Hinges After separating the door panels the hinges can be removed by...

Page 61: ...trim 6 Remove the two T20 Torx screws from the lower front trim 7 If replacing the left side brace remove the two screws from the RJ 45 bracket 8 Remove the two screws from the brace that secures the...

Page 62: ...our screws from the side trim 10 Remove the bottom six screws from the base 11 Remove the seven screws from the front of the insulation retainer 12 Remove the two 3 8 in nuts from the vertical brace C...

Page 63: ...nder the insulation retainer Vertical Brace Reinstallation 1 Reinstall the 3 8 in nuts on the vertical brace 2 Reinstall all of the screws starting with the lower two screws on the base pan 3 Reinstal...

Page 64: ...Oven Convection Fan Motor The Convection Fan Motor moves heated air throughout the oven cavity To replace the Convection Fan Motor begin from inside the oven cavity with the following steps Convectio...

Page 65: ...which was thermally operated The FAD board is a small sensor that provides speed feedback to the ERC There are no resistance checks available for this board only DC voltage checks Check for DC supply...

Page 66: ...ons the lock hook into the door to prevent opening during the Clean operation Operates the lock switches which tell the control if the door is in the locked or unlocked position Lock Assembly Diagnost...

Page 67: ...he rear may also catch on the frame when pulling through the rear wall Elements Hidden Bake To enhance oven cleanability and bake element longevity all wall ovens have hidden bake elements Hidden Bake...

Page 68: ...or lower 6 Reinstall the wires from the bake terminals and the T20 Torx screw securing the bake element to the frame 7 Reinstall the rear wire cover 8 Safely replace the oven into the cabinet install...

Page 69: ...emove the six T20 Torx screws from the rear ED H 3 Remove the four T20 Torx screws that are securing the element 4 Pull the element forward and remove the wires Convection Element Reinstallation 1 Rei...

Page 70: ...latch input is true door is locked 2 2 Temperature regulation error Sensor 3 0 Oven RTD Short 3 1 Oven RTD Open 3 4 I WKH FDOLEUDWLRQ 5 IDLOV RU LI WKH GL HUHQFH EHWZHHQ 57 WHPSHUDWXUH DQG QH WXQH WHP...

Page 71: ...e ZLUH RQ WKH UHOD SSUR LPDWHO No Bake Broil or Convection If all elements are not energizing the L2 High Limit Switch is open All 120 volt components No Cooling Fan Motor High If the Cooling Fan High...

Page 72: ...rom middle trim 3 Remove the two 1 4 in screws from lock motor assembly and set assembly aside 4 Press down on the black plastic tab on top of the frame and slide the board assembly out There is enoug...

Page 73: ...73 Machine Control Schematic...

Page 74: ...lt summary screen If no faults are present it will skip directly to load test If faults are present it will display up to 7 stored faults Faults for the lower oven will have to be cleared in the lower...

Page 75: ...nostics cycle the display will show the COMPLETE message then exit Service mode Similar Service modes are available on Microwave and Convection ovens To Enter the Service Mode on These Models 1 Press...

Page 76: ...ssible defects with this appliance Cleaning or servicing of the air gap device in the drain line Damage caused after delivery including damage from items dropped on the door EXCLUSION OF IMPLIED WARRA...

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