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Thermador CJ302B Service Manual

Summary of CJ302B

  • Page 1

    Service manual for thermador ® built-in ovens models: cj302b / cj302w / cj302s lit no. 94-30-007a october 2001 © 2001 bsh home appliances corp..

  • Page 2: Table of Contents

    Cj oven service manual lit. No. 94-30-007a table of contents general 1-8 data plate location ........................................................ 1 symbols you will see in the manual ............................ 2 avoid exposure to excessive microwave energy ......... 3 cautions to observe when ...

  • Page 3: General

    Cj oven service manual lit. No. 94-30-007a page 1 general data plate location data plate (behind oven cooling vent, right side) the cj oven service manual contains information that is neces- sary for servicing the thermador ® built-in oven models: cj302b / cj302w / cj302s this manual is designed to ...

  • Page 4: Service

    Cj oven service manual lit. No. 94-30-007a page 2 and proper operation and servicing of the oven, follow the instructions carefully each time you see one of the symbols. The following symbols are provided through- out this manual. For reasons of personal safety symbols you will see in the manual the...

  • Page 5: To Avoid Exposure to

    Cj oven service manual lit. No. 94-30-007a page 3 to avoid exposure to excessive microwave energy observe these precautions before and during servicing: 1. Do not operate or allow the oven to be operated with the door open. 2. Make the following safety checks on all ovens to be serviced before activ...

  • Page 6: Caution

    Cj oven service manual lit. No. 94-30-007a page 4 cautions to observe when troubleshooting unlike many other appliances, the microwave oven is high-voltage, high-current equipment. Although it is free from danger in ordinary use, extreme care should be taken during repair. There is high-voltage pres...

  • Page 7: Warning

    Cj oven service manual lit. No. 94-30-007a page 5 warning to avoid electrical shock: • disconnect the power to the appliance before servicing. • for those checks requiring the use of elec- trical power, exercise extreme care. • do not attempt high-voltage tests. Respect high-voltage.

  • Page 8: Warning

    Cj oven service manual lit. No. 94-30-007a page 6 warning check for microwave radiation leakage before and after every servicing. Should the leakage be more than 5 mw/cm 2 inform thermador immediately. After repairing or replacing any radiation safety device, keep a written record for future referen...

  • Page 9: Warning

    Cj oven service manual lit. No. 94-30-007a page 7 i. Pour 275 ± 15 cc (9 oz. ± 1 / 2 oz.) of 20 ± 5ºc (68 ± 9ºf) water in a beaker, graduated to 600 cc, and place the beaker in the center of the oven. 2. Set the radiation monitor to 2450 mhz, and follow the manufacturer ’s recommended test procedure...

  • Page 10: Thermador

    Cj oven service manual lit. No. 94-30-007a page 8 thermador ® warranty thermador will not pay for: 1. Service by an unauthorized agency. Damage or repairs by an unauthorized agency or use of unauthorized parts. 2. Service visits to: • teach you how to use the appliance. • correct the installation. Y...

  • Page 11: Servicing The Components

    Cj oven service manual lit. No. 94-30-007a page 9 servicing the components the serviceable components for the upper oven and plenum are in this section of the manual. Components are shown below. Refer to the pages that show the components you wish to service. Component locations top plenum component...

  • Page 12: Warning

    Cj oven service manual lit. No. 94-30-007a page 10 removing the trim, and top plenum covers warning 1. Turn off the electrical power going to the oven. 2. Pull the oven out of its mounting location so that you can access the trim and ple- num covers. 3. To remove the trim, remove the two end screws....

  • Page 13: Warning

    Cj oven service manual lit. No. 94-30-007a page 11 removing the electronic oven control board warning caution turn off the electrical power going to the oven before servicing. When you work on the oven, be careful when handling the sheet metal parts. There are sharp edges present and you can cut you...

  • Page 14: Removing The Fuseblock

    Cj oven service manual lit. No. 94-30-007a page 12 removing the fuseblock & microwave pcb control warning caution turn off the electrical power going to the oven before servicing. When you work on the oven, be careful when handling the sheet metal parts. There are sharp edges present and you can cut...

  • Page 15: & Double Line Break Relay

    Cj oven service manual lit. No. 94-30-007a page 13 removing the light transformer & double line break relay warning caution turn off the electrical power going to the oven before servicing. When you work on the oven, be careful when handling the sheet metal parts. There are sharp edges present and y...

  • Page 16: Stirrer Motor Assembly

    Cj oven service manual lit. No. 94-30-007a page 14 important the stirrer motor assembly is comprised of the folloing parts: (1) stirrer motor (1) stirrer motor bracket (1) stirrer motor insulation (1) mounting bracket (1) stirrer bushing (1) stirrer shaft (1) stirrer shield (4) stirrer bushing screw...

  • Page 17: Warning

    Cj oven service manual lit. No. 94-30-007a page 15 removing the stirrer motor assembly warning caution turn off the electrical power going to the oven before servicing. When you work on the oven, be careful when handling the sheet metal parts. There are sharp edges present and you can cut yourself i...

  • Page 18: Warning

    Cj oven service manual lit. No. 94-30-007a page 16 removing the magnetron fan assembly warning caution turn off the electrical power going to the oven before servicing. When you work on the oven, be careful when handling the sheet metal parts. There are sharp edges present and you can cut yourself i...

  • Page 19: Warning

    Cj oven service manual lit. No. 94-30-007a page 17 removing the crossflow top cooling blower warning caution turn off the electrical power going to the oven before servicing. When you work on the oven, be careful when handling the sheet metal parts. There are sharp edges present and you can cut your...

  • Page 20: Removing The High Voltage

    Cj oven service manual lit. No. 94-30-007a page 18 removing the high voltage microwave capacitor warning caution turn off the electrical power going to the oven before servicing. When you work on the oven, be careful when handling the sheet metal parts. There are sharp edges present and you can cut ...

  • Page 21: Warning

    Cj oven service manual lit. No. 94-30-007a page 19 removing the high voltage diode warning caution turn off the electrical power going to the oven before servicing. When you work on the oven, be careful when handling the sheet metal parts. There are sharp edges present and you can cut yourself if yo...

  • Page 22: Removing The High Voltage

    Cj oven service manual lit. No. 94-30-007a page 20 removing the high voltage microwave transformer warning caution turn off the electrical power going to the oven before servicing. When you work on the oven, be careful when handling the sheet metal parts. There are sharp edges present and you can cu...

  • Page 23

    Cj oven service manual lit. No. 94-30-007a page 21 8. Remove the four mounting screws from the high voltage microwave transformer and remove the transformer from the oven. 9. Remove the heat sink plate from the top of the high voltage microwave trans- former. 10. Apply a liberal amount of heat sink ...

  • Page 24: Removing The Magnetron, &

    Cj oven service manual lit. No. 94-30-007a page 22 removing the magnetron, & magnetron thermal cutout warning caution turn off the electrical power going to the oven before servicing. When you work on the oven, be careful when handling the sheet metal parts. There are sharp edges present and you can...

  • Page 25

    Cj oven service manual lit. No. 94-30-007a page 23 9. To reinstall the magnetron thermal cut- out: a) connect the wires (bk-130 & bk131) to the terminals. B) install the two screws. D) make sure the reset button is properly set. C) repeat steps a and b for nuts #3 and #4 so that all four screws are ...

  • Page 26: Warning

    Cj oven service manual lit. No. 94-30-007a page 24 removing the control panel assembly, display board, & touch panel glass warning caution turn off the electrical power going to the oven before servicing. When you work on the oven, be careful when handling the sheet metal parts. There are sharp edge...

  • Page 27: Warning

    Cj oven service manual lit. No. 94-30-007a page 25 removing the upper oven door switch warning caution turn off the electrical power going to the oven before servicing. When you work on the oven, be careful when handling the sheet metal parts. There are sharp edges present and you can cut yourself i...

  • Page 28: Secondary Switch Assembly

    Cj oven service manual lit. No. 94-30-007a page 26 removing the door latch assembly, high-temp cutout, and the monitor & secondary switch assembly warning caution turn off the electrical power going to the oven before servicing. When you work on the oven, be careful when handling the sheet metal par...

  • Page 29

    Cj oven service manual lit. No. 94-30-007a page 27 9. To remove the high-temp cutout: a) use an angled 1/4˝ socket and remove the two hex-head screws from the high-temp cutout bracket. Pull the cut- out forward as far as the wires will al- low. B) disconnect the wires from the termi- nals. 10. To re...

  • Page 30: Warning

    Cj oven service manual lit. No. 94-30-007a page 29 removing a halogen light assembly warning caution turn off the electrical power going to the oven before servicing. When you work on the oven, be careful when handling the sheet metal parts. There are sharp edges present and you can cut yourself if ...

  • Page 31: Tech Tips!!

    Cj oven service manual lit. No. 94-30-007a page 30 1. Position the wiring neatly inside the oven liner cutout for the halogen light and press the assembly into place so its edges are flush with the outside of the liner. 2. Install the bulb in the socket. 3. When you reinstall the metal screen, do no...

  • Page 32: Removing The Top  Plate

    Cj oven service manual lit. No. 94-30-007a page 31 removing the top plate 1. Turn off the electrical power going to the oven. 2. To make servicing inside the oven easier, remove the microwave oven door (see page 37 for the procedure). 3. Remove the oven racks. 4. To remove the top jet plate: a) remo...

  • Page 33: Warning

    Cj oven service manual lit. No. 94-30-007a page 32 removing the stirrer blade assembly 5. To remove the stirrer blade assembly: a) if not already done, remove the top jet plate. See page 30. B) through the mounting screw access hole in the stirrer blade, remove the screw and washer from the stirrer ...

  • Page 34: Removing The Meat Probe Jack

    Cj oven service manual lit. No. 94-30-007a page 33 removing the meat probe jack warning caution turn off the electrical power going to the oven before servicing. When you work on the oven, be careful when handling the sheet metal parts. There are sharp edges present and you can cut yourself if you a...

  • Page 35: Warning

    Cj oven service manual lit. No. 94-30-007a page 34 removing the jet plate element warning caution turn off the electrical power going to the oven before servicing. When you work on the oven, be careful when handling the sheet metal parts. There are sharp edges present and you can cut yourself if you...

  • Page 36: Warning

    Cj oven service manual lit. No. 94-30-007a page 35 removing the top oven thermal sensor warning caution turn off the electrical power going to the oven before servicing. When you work on the oven, be careful when handling the sheet metal parts. There are sharp edges present and you can cut yourself ...

  • Page 37: Tech Tip!!

    Cj oven service manual lit. No. 94-30-007a page 36 removing the upper oven door gasket 1. Fully open the oven door. 2. Pull the ends of the oven door gasket out of the hole in the door liner. 3. Unclip the gasket from the door liner and remove it. Tech tip!! Use a small screwdriver to insert the end...

  • Page 38: Removing and Reinstalling

    Cj oven service manual lit. No. 94-30-007a page 37 removing and reinstalling the upper microwave oven door 5. Raise the u-clip over the hook on each of the hinges to lock them. This will prevent the hinge from snapping closed when the door is removed. Removing the oven door caution: be careful handl...

  • Page 39

    Cj oven service manual lit. No. 94-30-007a page 38 reinstalling the oven door 1. Hold the oven door by the sides approxi- mately 2/3 of the way down and insert the hinges into the oven slots near the top as far as possible. Insert hinge into slot near top 6. Grasp the oven door by the sides near the...

  • Page 40: Service

    Cj oven service manual lit. No. 94-30-007a page 39 2. Lower the oven door to its fully open po- sition. 3. Rotate the u-clips on the hinges forward to the unlocked position. 4. Close the oven door. 5. Reinstall the two hinge locking screws. Rotate u-clip forward to unlock after reinstalling the oven...

  • Page 41: Caution

    Cj oven service manual lit. No. 94-30-007a page 40 removing the upper oven door handle & outer glass assembly caution when you work on the oven, be careful when handling the sheet metal parts. There are sharp edges present and you can cut yourself if you are not careful. 3. Lift the door liner assem...

  • Page 42: Caution

    Cj oven service manual lit. No. 94-30-007a page 41 removing an oven door hinge, actuator arm, center glass, rf screen, & inner glass caution when you work on the oven, be careful when handling the sheet metal parts. There are sharp edges present and you can cut yourself if you are not careful. 1. Re...

  • Page 43

    Cj oven service manual lit. No. 94-30-007a page 42 c) remove the screws from the four insu- lation cover brackets and the four glass assembly clamps and remove the brackets and clamps. B) remove the insulation strip from around the center glass assembly. D) lift the center glass and frame out of the...

  • Page 44: Service

    Cj oven service manual lit. No. 94-30-007a page 43 the center glass is heat-treated and has the letters “hb” stamped in two places near one of the edges. If you are in doubt as to which glass is heat- treated, use an ohmmeter to check it. To do this, set the ohmmeter to the r x 1 scale and touch the...

  • Page 45: Testing The Components

    Cj oven service manual lit. No. 94-30-007a page 44 testing the components resistance measurements warning troubleshooting refer to page 12 to access the 20a time-delay fuse. To test the 20a time-delay fuse, perform the following steps. 1. Turn off the electrical power to the oven. 2. Set the ohmmete...

  • Page 46

    Cj oven service manual lit. No. 94-30-007a page 45 refer to page 13 to access the light transformer. To test the light transformer, perform the fol- lowing steps. 1. Turn off the electrical power to the oven. 2. Set the ohmmeter to the r x 1 scale. 3. Disconnect one of the wires from the bot- tom (p...

  • Page 47: Tech Tip

    Cj oven service manual lit. No. 94-30-007a page 46 refer to page 14 to access the stirrer motor. To test the stirrer motor, perform the following steps. 1. Turn off the electrical power to the oven. 2. Set the ohmmeter to the r x 1 scale. 3. Disconnect the stirrer motor wire going to the terminal bl...

  • Page 48

    Cj oven service manual lit. No. 94-30-007a page 47 refer to page 17 to access the high voltage capacitor. To test the high voltage capacitor, perform the following steps. 1. Turn off the electrical power to the oven. 2. Set the ohmmeter to the r x 10k scale. 3. Disconnect the wires from the capacito...

  • Page 49

    Cj oven service manual lit. No. 94-30-007a page 48 magnetron refer to page 21 to access the magnetron. To test the magnetron, perform the following steps. 1. Turn off the electrical power to the oven. 2. Set the ohmmeter to the r x 1 scale. 3. Disconnect the leads from the filament terminals of the ...

  • Page 50

    Cj oven service manual lit. No. 94-30-007a page 49 magnetron fan motor refer to page 15 to access the magnetron fan motor. To test the motor, perform the follow- ing steps. 1. Turn off the electrical power to the oven. 2. Set the ohmmeter to the r x 1 scale. 3. Disconnect one of the leads from the m...

  • Page 51

    Cj oven service manual lit. No. 94-30-007a page 50 door latch assembly refer to page 25 to access the door latch assem- bly. To test the door latch assembly compo- nents, perform the following steps. 1. Turn off the electrical power to the oven. 2. Set the ohmmeter to the r x 1 scale. Testing the la...

  • Page 52

    Cj oven service manual lit. No. 94-30-007a page 51 door switch refer to page 24 to access the door switch. To test the switch, perform the following steps. 1. Turn off the electrical power to the oven. 2. Set the ohmmeter to the r x 1 scale. 3. Disconnect one of the wires from the door switch. 4. To...

  • Page 53

    Cj oven service manual lit. No. 94-30-007a page 52 lower oven convection element refer to page 83 to access the convection ele- ment. To test the element, perform the follow- ing steps. 1. Turn off the electrical power to the oven. 2. Set the ohmmeter to the r x 1 scale. 3. Disconnect one of the wir...

  • Page 54

    Cj oven service manual lit. No. 94-30-007a page 53 refer to page 34 to access the jet concealed element. To test the element, perform the fol- lowing steps. 1. Turn off the electrical power to the oven. 2. Set the ohmmeter to the r x 1 scale. 3. Disconnect one of the orange wires from the element. 4...

  • Page 55

    Cj oven service manual lit. No. 94-30-007a page 54 lower oven meat probe jack refer to page 33 to access the meat probe jack. To test the jack, perform the following steps. 1. Set the ohmmeter to the r x 1 scale. 2. Disconnect one of the wires from the meat probe jack. 3. Touch the test leads to the...

  • Page 56

    Cj oven service manual lit. No. 94-30-007a page 55 microwave pcb control refer to page 12 to access the microwave pcb control. The control has a relay (k1), two head- ers (p1 & p3), and two 1/4˝ wire terminals (p2-1 & p2-2). These components perform the following functions: relay k1: transfers 120-v...

  • Page 57

    Cj oven service manual lit. No. 94-30-007a page 56 microwave components description 4 1 2 3 6 5 1 fuse 2 diode 3 capacitor (high voltage) 4 transformer 5 high temp cutout (mag. Tube) 6 magnetron tube 1 2 3 6 4 5.

  • Page 58: Cj Oven Switches

    Cj oven service manual lit. No. 94-30-007a page 57 cj oven switches door activated switches 1) upper oven door switch 2) lower oven door switch 3) monitor switch 4) secondary switch door latch assembly switches 1) latch interlock switch (primary) 2) latch lock switch 3) latch unlock switch air switc...

  • Page 59: Door Switch

    Cj oven service manual lit. No. 94-30-007a page 58 upper/lower oven door switch: the normally open oven door switch is mounted on the oven latch plate. This switch is used to complete a circuit from the dac control board through the door switch and back to the dac control board. Closing the oven doo...

  • Page 60: Switches Activated By Hook

    Cj oven service manual lit. No. 94-30-007a page 59 ➝ ➝ door hook switches switches activated by hook monitor switch/secondary switch: these switches are activated by a spring action hook on the microwave oven door. When the door is opened and closed, these switches are activated (see illustration be...

  • Page 61: Oven Mounted Switches

    Cj oven service manual lit. No. 94-30-007a page 60 oven mounted switches the monitor switch is mounted on the left side of the bracket. It is normally closed. The switch is opened by the forward motion of the hook when the door is closed. The purpose of this switch is to cause the fuse to blow if th...

  • Page 62

    Cj oven service manual lit. No. 94-30-007a page 61 door latch assembly switches: the door latch assembly has 3 mounted switches. The n.O. Latch interlock switch (primary), the n.O. Lock switch, and the n.O. Unlock switch. These switches are positioned as follows in the idle state (unlatched); normal...

  • Page 63: Microwave

    Cj oven service manual lit. No. 94-30-007a page 62 latch interlock switch (primary) circuit in microwave the n.O. Latch interlock switch is open with the door unlatched. When microwave mode is selected, the latch motor runs. The cam on the latch assembly closes the n.O. Latch interlock switch and co...

  • Page 64: Latch Unlock Switch

    Cj oven service manual lit. No. 94-30-007a page 63 the n.O. Latch unlock switch is closed with the door latch unlatched. The unlock switch in the closed position sends a signal to the board that the door is not latched. This prevents the board from proceeding into self clean or microwave. Latch lock...

  • Page 65: Air Switches

    Cj oven service manual lit. No. 94-30-007a page 64 air switches the air switches are used to complete the 24 v.A.C. Signal voltage circuit from the dac control through the air switches, and back to the dac control board. The 2 n.O. Air switches are mounted in the rear of the oven. These 2 air switch...

  • Page 66: Microwave Fuse Failure:

    Cj oven service manual lit. No. 94-30-007a page 65 the microwave oven is protected from interlock switch failure by a 20 ampere fuse. A defective switch or any other factor causing an overload on the microwave circuit will blow the fuse and stop the operation of the microwave section of the oven. Th...

  • Page 67: Diode

    Cj oven service manual lit. No. 94-30-007a page 66 diode the diode is a device used to convert alternating current (ac) into pulsating direct current (dc) allowing it to pass forward in one direction while blocking the current flow in the opposite direction. There is no charge stored in this part. H...

  • Page 68: Stirrer Motor

    Cj oven service manual lit. No. 94-30-007a page 67 stirrer motor the stirrer motor is a 120 volt ac motor. The purpose of the stirrer motor is to run the stirrer blades at the output of the wave guide. The stirrer rotates at about 60 rpm. As the microwave energy enters the oven cavity through the wa...

  • Page 69: “Cj” Controls

    Cj oven service manual lit. No. 94-30-007a page 68 “cj” controls.

  • Page 70: “Cj” Relay Board Matrix

    Cj oven service manual lit. No. 94-30-007a page 69 “cj” relay board matrix replay function k0 upper oven latch motor k1 lower oven latch motor k2 none k3 none k4 upper oven cooling motor k5 lower oven cooling motor k6 upper oven halogen lamp k7 lower oven halogen lamp k8 upper oven both jet blowers ...

  • Page 71: Cj Rela

    Cj oven service manual lit. No. 94-30-007a page 70 cj rela y function ➝ ➝ ➝ ➝ ➝ ➝ ➝ ➝ ➝ ➝ ➝ ➝ ➝ ➝ ➝ ➝ ➝ ➝ ➝ ➝ ➝ ➝ ➝ ➝ rela y k9 transf er s 120 v.A.C. Fr om l2 rela y k10b transf er s 120 v.A.C. Fr om l2 rela y k13 transf er s 120 v.A.C. Fr om l2 rela y k14b transf er s 120 v.A.C. Fr om l2 rela y k1...

  • Page 72: Cj Rela

    Cj oven service manual lit. No. 94-30-007a page 71 cj rela y function ➝ ➝ ➝ ➝ ➝ ➝ ➝ ➝ ➝ ➝ ➝ ➝ ➝ ➝ ➝ ➝ ➝ ➝ ➝ ➝ rela y k1 transf er s 120 v.A.C. Fr om l2 rela y k0 transf er s 12 v .A.C. Rela y k6 transf er s 12 v .A.C. Rela y k67 transf er s 12 v .A.C. Pin p14 outputs 24 v .D .C. Pin p15 outputs 24 v...

  • Page 73

    Cj oven service manual lit. No. 94-30-007a page 72 digital (dac) appliance control the digital appliance control (dac) control is a microproccessor based control. What this means is that the dac control uses signal voltage to detect switch function. The switches used with the dac control to detect s...

  • Page 74

    Cj oven service manual lit. No. 94-30-007a page 73 the following switches receive signal voltage from the dac control board and return the signal voltage to the dac control board. Both door switches: closing the oven door closes these switches. The completed circuit signals the dac control that the ...

  • Page 75: Voltages

    Cj oven service manual lit. No. 94-30-007a page 74 voltages when troubleshooting, testing and repairing the ovens, you will observe these voltages; 1) 4000 volts (half wave doubler) for microwave section. 2) 120/240 volts for elements and jet blowers 3) 24 volts d.C. For relay coils, and microwave b...

  • Page 76: “Cj” Dac Relay Board

    Cj oven service manual lit. No. 94-30-007a page 75 “cj” dac relay board (digital appliance controls) there are 2 relay boards, 1 for a single oven and 1 for a double oven. You can use the double oven board for a single oven. You must use a double oven board for a double oven. The relay board has 14 ...

  • Page 77: Dac Relay Board

    Cj oven service manual lit. No. 94-30-007a page 76 dac relay board (continued) the relay board has 8 small pin headers. They are identified as p2, p3, p5, p6, p9, p10, p11, p14, p15. These small pin headers carry signal voltage to specific components. The pin numbers are identified on the schematic....

  • Page 78: Dac Relay Board

    Cj oven service manual lit. No. 94-30-007a page 77 dac relay board (continued) the relay board has 5 large pin headers. They are identified as p0, p1, p7, p8, p18. These large pin headers carry current to specific components. The pin numberts are identified on the schematic. P0 large pin header has ...

  • Page 79: Dac Relay Board

    Cj oven service manual lit. No. 94-30-007a page 78 dac relay board (continued) p7 large pin header has 4 pins and are identified as follows; p7-1 blank p7-2 blank p7-3 current from l2 to k11 relay p7-4 current to upper oven convection motor p8 large pin header has 4 pins and are identified as follow...

  • Page 80: Explanation of The

    Cj oven service manual lit. No. 94-30-007a page 79 explanation of the wire harness the wire harness’ slide onto the pin headers of the relay board, display head, and touch control boards. The illustration above shows the pin headers on the relay board. The wire harness is shown in the illustration a...

  • Page 81: Wire Harnesses

    Cj oven service manual lit. No. 94-30-007a page 80 the “cj” oven uses 5 wire harnesses to transfer signal voltage between the dac control (relay board), display head, and touch control boards (glued on the glass). The 5 wire harness’ connect to the corresponding pin headers on the corresponding comp...

  • Page 82: Troubleshooting Chart

    Cj oven service manual lit. No. 94-30-007a page 81 troubleshooting chart for relay board header pin failures wire harness off at pin header; or circuits open: p2 lower oven sensor: control functions normal. When sensor opens, f-61 code will appear. If sensor shorts, f-60 will appear. Cooling fan is ...

  • Page 83

    Cj oven service manual lit. No. 94-30-007a page 82 p18 relay board transformer: no fail code, no display at all. Board is dead. P1 both cooling motors and halogen lights: will accept modes. In about 45 seconds f-34 will appear in the upper oven or f-64 will appear in the lower oven because the cooli...

  • Page 84: • Touch Control Glass

    Cj oven service manual lit. No. 94-30-007a page 83 “cj” oven control panel • touch control glass • touch control boards • display head microwave probe jetdirect bake upper convection lower cooksmart self clean broil roast upper 1-2-3-4 off pause proof stop cook lower resume dehydrate time time off l...

  • Page 85: Electronic Oven Controls

    Cj oven service manual lit. No. 94-30-007a page 84 electronic oven controls handling the boards the touch control board and the display head are subject to failure if static electricity is transferred to the components during han- dling. When handling these parts, use a ground- ing strap, if availab...

  • Page 86: Control Panel Assembly

    Cj oven service manual lit. No. 94-30-007a page 85 control panel assembly the control panel assembly is comprised of the following parts; control panel: there are a total of 6 control panels. 2 black, 2 white and 2 stainless. The control panels are what determines the color of the unit. Curved glass...

  • Page 87: Glass Touch Panel

    Cj oven service manual lit. No. 94-30-007a page 86 glass touch panel the glass touch panel is comprised of a piece of curved glass with 2 control boards glued onto it. Left side touch control board: the large touch control board is glued on the left side of the curved glass. The large touch control ...

  • Page 88: Display Head

    Cj oven service manual lit. No. 94-30-007a page 87 display head the display head has a total of 8 pin headers (0nly 7 are used), they are identified as p1, p2, p4, p6, p8, p10 and p11. P1 pin header has 18 pins and connects to the left touch control board (p1). P2 pin header has 2 pins and connects ...

  • Page 89: Troubleshooting Chart

    Cj oven service manual lit. No. 94-30-007a page 88 troubleshooting chart for display head pin header failures wire harness off at pin header or open circuits p10 accepts display signals from relay board: glass control panel is completely dead. No display, circuit must be reset. P11 accepts communica...

  • Page 90: “Cj” Lower Oven

    Cj oven service manual lit. No. 94-30-007a page 89 hidden bake element under oven liner white wires bracket screws back of liner broil element 2 top front mounting screws broil element brackets access panel cover hex nut meat probe jack “cj” lower oven (same as “c” and “cm”).

  • Page 91: (Lower Ovens Only)

    Cj oven service manual lit. No. 94-30-007a page 90 removing the hidden bake element (lower ovens only) warning turn off the electrical power circuit to the oven at the main junction box be- fore servicing this unit. When you work on the oven, be careful when handling the sheet metal parts. There are...

  • Page 92: (Lower Ovens Only)

    Cj oven service manual lit. No. 94-30-007a page 91 remove screws rear panel remove screws flange flange remove 6 screws remove 3 screws support bracket bake element wires wire tie figure b figurea bend flange down bend flange down flange figure c hidden element cover hidden bake element screw (1 of ...

  • Page 93: Warning

    Cj oven service manual lit. No. 94-30-007a page 92 removing the oven temperature sensor refer to illustration, below, for the following steps. 1. Turn off the electrical power to the oven. 2. To make servicing easier, remove the oven door (see page 94). 3. Remove the racks from the oven. Inline spli...

  • Page 94: Warning

    Cj oven service manual lit. No. 94-30-007a page 93 removing the convection bake element refer to illustration, below, for the following steps. 1. Turn off the electrical power to the oven. 2. To make servicing easier, remove the oven door (see page 94). 3. Remove the racks from the oven. 4. Remove t...

  • Page 95: Warning

    Cj oven service manual lit. No. 94-30-007a page 94 removing a convection fan motor refer to illustration for the following steps. 1. Turn off the electrical power to the oven. 2. To make servicing easier, remove the oven door (see page 94). 3. Remove the racks from the oven. 4. Remove the front scre...

  • Page 96

    Cj oven service manual lit. No. 94-30-007a page 95 oven liner fan motor white wire (#44) fan motor screws pan e-ring flat washer hex nut (left-rotating thread) bracket with insulation convection blade brown wire (#45) top screw top screw bottom screws convection baffle.

  • Page 97: Warning

    Cj oven service manual lit. No. 94-30-007a page 96 removing a halogen lamp holder refer to illustration, right, for the following steps. 1. Turn off the electrical power to the oven. 2. Remove the oven racks. 3. Remove the oven rack support for the halogen lamp holder you are removing. Caution: make...

  • Page 98: Warning

    Cj oven service manual lit. No. 94-30-007a page 97 removing the lamp transformer & lower oven double line break relay 1. Turn off the electrical power to the oven. 2. Open the upper oven door. 3. Remove the control panel and display head (see page 11 for the procedure). 4. Remove the front subpanel ...

  • Page 99: Warning

    Cj oven service manual lit. No. 94-30-007a page 98 removing the oven light switch, the oven door latch assembly and the hi-temp cutout in lower oven refer to illustration on page 89 for the follow- ing steps. 1. Turn off the electrical power to the oven. 2. Open the oven door for the component you w...

  • Page 100: Tech

    Cj oven service manual lit. No. 94-30-007a page 99 normally open (gold) contacts door open = switch open normally closed door open = switch closed oven door latch lower oven wht (51& 52) upper oven wht (01& 02) lower oven wht (52 & 53) upper oven wht (02 & 03) lower oven wht (56) upper oven wht (06)...

  • Page 101: Removing The Air Switches

    Cj oven service manual lit. No. 94-30-007a page 100 removing the air switches warning turn off the electrical power circuit to the oven at the main junction box before ser- vicing this unit. When you work on the oven, be careful when handling the sheet metal parts. There are sharp edges present and ...

  • Page 102: Removing The Air Switches

    Cj oven service manual lit. No. 94-30-007a page 101 removing the air switches figure 3 air switch through the diverter figure 2 lower air switch air switch 2 wires 2 screws switch bracket.

  • Page 103: Removing A Blower

    Cj oven service manual lit. No. 94-30-007a page 102 removing a blower 1. Turn off the electrical power to the oven. 2. To make servicing easier, remove the oven door (see page 94). 3. To remove the upper blower (see figure a, page 5-93): a) remove the oven from the wall. B) remove the screws from th...

  • Page 104: Upper Blower

    Cj oven service manual lit. No. 94-30-007a page 103 white (98) white (24) lt. Blue (97) dk. Blue (23) upper blower mounting bracket screw screw screw back of plenum blower wire (24) to upper blower motor blower bracket blower wire (23) to upper blower motor 1 2 3 4 5 6 7 upper blower lower blower fi...

  • Page 105: Removing An Oven Door

    Cj oven service manual lit. No. 94-30-007a page 104 removing an oven door refer to the illustration below for the follow- ing steps. 1. Open the door to its fully open position. 2. Raise the hinge latch over the hook on each of the hinges. Position up to remove door position down to close door 3. To...

  • Page 106: Caution

    Cj oven service manual lit. No. 94-30-007a page 105 removing the oven door gasket refer to illustration, below, for the following steps. 1. Open the oven door to its fully open po- sition. 2. Pull the ends of the old gasket out of the holes in the door (see inset 1 on the illus- tration). 3. Working...

  • Page 107: Caution

    Cj oven service manual lit. No. 94-30-007a page 106 removing the oven door components 1. To remove any of the oven door compo- nents, remove the oven door from the oven (see page 94). 2. Refer to illustration, below, as you remove the door components. The illustration shows the order of removal. Whe...

  • Page 108: Removing The Oven Module

    Cj oven service manual lit. No. 94-30-007a page 107 removing the oven module (30") convection kit—#35-00-687 warning turn off the electrical power circuit to the oven at the main junction box before ser- vicing this unit. When you work on the oven, be careful when handling the sheet metal parts. The...

  • Page 109: Troubleshooting

    Cj oven service manual lit. No. 94-30-007a page 108 troubleshooting testing the components the air switch refer to page 90 to access the air switch. 1. With no power applied, remove the wire connectors from the terminals. 2. Set the ohmmeter to the r x 1 scale. 3. Connect one of the ohmmeter leads t...

  • Page 110

    Cj oven service manual lit. No. 94-30-007a page 109 the lamp transformer refer to page 87 to access the lamp transformer. 1. With no power applied, remove the wires from the terminals of the lamp transformer. 2. Set the ohmmeter to the r x 1 scale. 3. Touch the ohmmeter leads to the primary terminal...

  • Page 111: The Oven Door Latch

    Cj oven service manual lit. No. 94-30-007a page 110 the oven door latch assembly the oven door latch locks the oven door during the clean cycle (see the illustration at the bottom of the next column for the various latch positions). Refer to page 88 to access the oven door latch assembly. To test on...

  • Page 112: The Broil Element

    Cj oven service manual lit. No. 94-30-007a page 111 the broil element refer to page 79to access the broil element. 1. With no power applied, remove the wires from the terminals of the broil element. 2. Set the ohmmeter to the r x 1 scale. 3. Touch the ohmmeter leads to the broil ele- ment terminals....

  • Page 113: The Hi-Temp Cutout

    Cj oven service manual lit. No. 94-30-007a page 112 the hi-temp cutout the hi-temp cutout contacts open at or above 350˚f ±8˚ and are manually reset by pressing the reset button. Refer to page 88 to access the hi-temp cutout. 1. With no power applied, remove the wires from the terminals of the hi-te...

  • Page 114: Fault Codes

    Cj oven service manual lit. No. 94-30-007a page 113 fault codes code fault detection f10 power board incompatibility f11 communication error with power board f12 vcc lift-off (power board) f13 power board not calibrated f14 display board eeprom error f19 misc. Power board error f20 upper oven cancel...

  • Page 115

    Cj oven service manual lit. No. 94-30-007a page 114 cj302 electronic oven control wiring.

  • Page 116: See 11 X 17 Page

    Cj oven service manual lit. No. 94-30-007a see 11 x 17 page cj302 wiring diagram page 115.

  • Page 118: See 11 X 17 Page

    Cj oven service manual lit. No. 94-30-007a see 11 x 17 page cj302 schematic drawing page 116.

  • Page 120: Notes

    Cj oven service manual lit. No. 94-30-007a notes page 117.

  • Page 121

    5551 mcfadden avenue, huntington beach, ca 92649 • 800/735-4328 ro8577cj • 94-30-007a • © 2001 bsh home appliances corp. • litho u.S.A. 10/01.