TurboChef C3/C Service And Repair Manual
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TurboChef C3/C Service And Repair Manual

Convection microwave oven
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TM
C3/C, C3/CMULTI EW, C3/CMULTI ED, C3/CMULTI UK,
C3/D, C3/D EW, C3/D ED, C3/D UK
CONVECTION MICROWAVE OVEN
SERVICE AND REPAIR MANUAL
TURBOCHEF TECHNOLOGIES INC.
www.turbochef.com
4240 International Parkway, Suite 105, Dallas, Texas 75007 USA
(800) 90TURBO or +1 214-379-6000
PN:
TC3-0215
Rev. F Oct. 2008
© 2007 - TurboChef Technologies Inc

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  • Page 1 C3/C, C3/CMULTI EW, C3/CMULTI ED, C3/CMULTI UK, C3/D, C3/D EW, C3/D ED, C3/D UK CONVECTION MICROWAVE OVEN SERVICE AND REPAIR MANUAL TURBOCHEF TECHNOLOGIES INC. www.turbochef.com 4240 International Parkway, Suite 105, Dallas, Texas 75007 USA (800) 90TURBO or +1 214-379-6000 TC3-0215 Rev.
  • Page 3 TurboChef Technologies, Inc. C3 This page intentionally left blank.
  • Page 4 TurboChef Technologies, Inc. This page intentionally left blank.

  • Page 5: Table Of Contents

    ………………………………………….. Chapter 6 Electrical Compartment & Controls Electrical Component Locations C3/AB Electrical Component Locations C3/C Electrical Component Locations C3/Multi Electrical Component Locations C3/C Multi ………………… Electrical Component Parts Lists Control Panel Detail Control System Troubleshooting (SMT) I/O Board Troubleshooting 6-10...
  • Page 6 TurboChef Technologies, Inc. Door Removal and Replacement Left Side Parts List 7-13 Door Removal and Replacement Right Side Parts List 7-16 C3/C AND C3/CMULTI Door Assy and Parts List 7-18 Chapter 7 Cook Door C3/AB and C3MULTI Door Assy and Parts List...

  • Page 7: Read This First

    READ THIS FIRST Before working on the TurboChef Technologies, Inc. C Series oven you must first read the safety instructions on the following pages. The C3 series oven is a combination convection/microwave oven. While servicing this oven, an RF meter must be used at all times to check for microwave leakage. This RF reading must be recorded on your work invoice.

  • Page 8: Important Safety Instructions

    IMPORTANT SAFETY INSTRUCTIONS WHEN USING ELECTRICAL APPLIANCES, THE FOLLOWING BASIC SAFETY PRECAUTIONS SHOULD BE STRICTLY ADHERED TO: WARNING!! To reduce the risk of burns, electric shock, fire, injury to persons or exposure to excessive microwave energy: 1. Read all instructions before using the appliance. 2.

  • Page 9: Precautions To Avoid Possible Exposure To Excessive Microwave Energy

    PRECAUTIONS TO AVOID POSSIBLE EXPOSURE TO EXCESSIVE MICROWAVE ENERGY 1. DO NOT attempt to operate this oven with the door open since open-door operation can result in harmful exposure to microwave energy. It is important not to defeat or tamper with the safety interlocks. 2.

  • Page 10: Precautions To Be Observed Before And During Servicing To Avoid Possible Exposure To Excessive Microwave Energy

    PRECAUTIONS TO BE OBSERVED BEFORE AND DURING SERVICING TO AVOID POSSIBLE EXPOSURE TO EXCESSIVE MICROWAVE ENERGY 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 activating the magnetron or other microwave source, and make repairs as necessary: a) Interlock operation.

  • Page 11: Grounding Instructions

    C3 series ovens are manufactured in various locations, as such the C3/C and C3/Cmulti are constructed using the Metric System. Therefore, it is very important to note the model number of the unit you are servicing to ensure you get the correct Metric component. Care has been given in this manual to list the different part numbers for the Metric and Imperial (C3/AB and C3Multi) ovens.
  • Page 12 SAVE THESE INSTRUCTIONS...

  • Page 13: Rf Interference Considerations

    RF INTERFERENCE CONSIDERATIONS This oven generates radio frequency signals. This device has been tested and determined to be in compliance with applicable part of FCC part 18 requirements and to the protection requirements of Council Directive 89/336/EEC on the approximation of the laws of the Member States relating to electromagnetic compatibility at the time of manufacture.

  • Page 15: Installation Specs

    CHAPTER 1 INSTALLATION SPECS...

  • Page 16: Oven Description

    TurboChef Technologies, Inc. C series OVEN DESCRIPTION SPECIFICATIONS C3/AB, C3MULTI, C3/C, AND C3/CMULTI Dimensions (single unit) 29” W x 25.5” H x 29.5” D (73.66 cm x 64.77 cm x 74.93 cm) Dimensions (double stacked units) 29” W x 43” H x 29.5” D (73.66 cm x 109.22 cm x 74.93 cm) Maximum Input 7.2 kW...
  • Page 17 Operator responsible proper placement on the countertop. TurboChef will not be responsible should an oven fall off a countertop due to improper placement or use by the customer. Oven placement shall be readily accessible by a service agent. Additional charges...
  • Page 19 CHAPTER 2 CLEANING & OPERATING...

  • Page 20: Basic Cleaning Procedures

    TurboChef Technologies, Inc. C Series BASIC CLEANING PROCEDURES PROBLEMS ASSOCIATED WITH IMPROPER 2. Clean the ceramic cooking platter, and wave CLEANING guide cap using brushes and scrub pads. Rinse to remove all cleaner and debris. The oven may not be operating correctly because Inspect for damage and replace as required.

  • Page 21: Theory Of Operation

    CHAPTER 3 THEORY OF OPERATION...
  • Page 22 ® The TurboChef C3/C oven utilizes two independent heat transfer mechanisms in order to rapidly cook food. The systems are as follows: Convection and Microwave energy. By combining these mechanisms and with our ability to control each mechanism independently, we are able to reduce the cook time of most foods by 70%-90%.

  • Page 23: Theory Of Operation Description

    Theory of Operation Cook Temperature Point GLOSSARY OF COMMON Temperature should be a constant OPERATING TERMS parameter. The same cook temperature Display - Primary interface to relay should be used by all cook recipes. messages to the operator. MODES Keypad - Primary interface for the Mode –...
  • Page 24 TurboChef Technologies, Inc. C Series Programing EDIT GROUPS Edit Mode GROUP A GROUP E Edit mode enables the operator to alter Recipes and the Cook Chamber Temperature (CC). To Access Edit Mode, GROUP B GROUP F press the “Up” and “Down” Arrows Keys on the keypad simultaneously.
  • Page 25 Theory of Operation User Configurable Options: The user may enable or disable the < GROUP 1 > following options: ITEM 1 Edit Mode: For security purposes the Edit COUNT Mode can be disabled by pressing the “Back COOK TIME 00:00 WARMING UP Arrow”...
  • Page 26 TurboChef Technologies, Inc. C Series “Enter” the Access Pin “T-I-M-E” and “Enter”. When prompted, press “9” to re- enable or any other key to disable the Time State. Passwords Edit Mode: “Back and “Enter” simultaneously. Enter Pin: “9” & “Enter”.

  • Page 27: Fault Codes

    CHAPTER 4 FAULT CODES...

  • Page 28: Fault Code Introduction

    NOTE: Some error codes may be different or F3 MAG CURR no longer available or current. The following F4 MONITOR list details all error codes created since C3/AB, C3/C, C3CMulti and C3/AB-Multi no F5 MAG TEMP exceptions. F6 EC TEMP Figure 4-1: Fault...
  • Page 29 Theory of Operation Fault Code Messages Matrix New Error Warm- While Self- Reference Old Error Code Code Cooking Test Chapter BLOWER STATUS F3 BLOWER LOW COOK TMP F2 LOW TEMP LOW MAG CURR F3 MAG CURR DOOR MONITOR F4 MONITOR MAG OVER TMP F5 MAG TEMP ELEC OVR TMP...

  • Page 31: Chapter 5 Test

    CHAPTER 5 TEST...
  • Page 32 2. The display reads: NOTE: The RF power indication is optional on ENTER ACCESS CODE the C3/C SERIES model oven. 3. Use the NUMERIC keypad to enter the Diagnostic Display following access code: The DIAG key turns on or off the diagnostic 9- 4- 2- 8 (Older Ovens 8- 3 -1 -7) display feature.
  • Page 33 (cook door monitor • switch out of sequence)* * NOTE: The C3/C model and late model C3/AB P S M t h H A W oven will have the LOW MAG FLUC error message replaced by the DOOR MONITOR error 2nd Screen: Test Mode message.

  • Page 34: Passwords For Operating C3 Ovens

    TurboChef Technologies, Inc. C Series PASSWORDS FOR OPERATING C3/C OVENS with C3AD Software Version and ENTER keys. At the “Enter Pin ____” prompt, key in 3663 “DONE” and press To access TEST/SERVICE functions, press ♦ Enter. At the “Done Screen” prompt, press 9 and hold BACK and ENTER keys.
  • Page 35 CHAPTER 6 ELECTRICAL &CONTROLS SYSTEM...

  • Page 36: Electrical Component Locations C3/C Multi

    1. CIRCUIT BREAKER: CB1-35 AMP 10. ELECTRICAL COMPARTMENT COOLING FAN #1 2. Fuses: (2x12 AMP-C3/AB & C3/C) (100596) 11. MAGNETRON COOLING FAN (T0262) 2. FUSES: (2 x 12 AMP - C3/AB;C3/C) 11. MAGNETRON COOLING FAN (25AMP-C3/C) (100597) 12. STIRRER MOTOR (101891) 3.
  • Page 37 (100519) 10. ELECTRICAL COMPARTMENT COOLING FAN #1 2. Fuses: (2x12 AMP-C3/AB & C3/C) (100596) 11. MAGNETRON COOLING FAN (T0262) 2. FUSES: (2 x 12 AMP - C3/AB;C3/C) 11. MAGNETRON COOLING FAN (25AMP-C3/C) (100597) 12. STIRRER MOTOR (101891) (25 AMP - C3/C) 12.
  • Page 38 TurboChef Technologies, Inc. C Series ELECTRICAL COMPONENT LOCATIONS: “C3/MULTI” OVENS ONLY 1. Circuit Breaker: CB1-15A & CB2-15A&CB3-15A (103170) 10. COOLING FAN (M9609) 2. 12 A-FUSE ATM-12 (100596) 11. MAGNETRON COOLING FAN (T0262) 12. STIRRER MOTOR (101891) 3. CONVECTION HEAT HIGH LIMIT (R7603) 13.
  • Page 39 Electrical Compartment and Controls ELECTRICAL COMPONENT LOCATIONS: “C3/C MULTI” OVENS ONLY 1. Circuit Breaker: CB1-15A & CB2-15A&CB3-15A (103170) 10. COOLING FAN (100519) 2. 12 A-FUSE ATM-12 (100596) 11. MAGNETRON COOLING FAN (T0262) 12. STIRRER MOTOR (101891) 3. CONVECTION HIGH LIMIT (R7603) 13.
  • Page 40 TurboChef Technologies, Inc. C Series ELECTRICAL COMPONENTS PARTS LIST SUMMARY Item # Part Description Used on Model(s) Number T0322 Circuit Breaker CB1-35A w/Trip Coil C3/AB & C3/C 100596 12 Amp Aux Fuse 100597 25 Amp Heater Fuse C3/C 100591 Fuse Holders...
  • Page 41 Circuit Breakers CB2 & CB3 15 Amp C3Multi & C3/CMulti 101285 K7 Solid State Relay C3Multi & C3/CMulti 102070 Thermostat, Magnetron (212F) 102085 Thermostat, EC Box 100542 EMI Filters (not shown) C3Multi & C3/CMulti T0286 EMI Filter C3/AB & C3/C...

  • Page 42: Control Panel Detail

    TurboChef Technologies, Inc. C Series CONTROL PANEL COMPONENT DETAIL CONTROL PANEL ASSEMBLY AND COMPONENT CONTROL PANEL ASSEMBLY AND COMPONENT 1. ASSEMBLED CONTROL PANEL 4. KEYPAD 2. KEYPAD RIBBON CABLE 5. CONTROL MOUNTING BRACKET 3. DISPLAY CONNECTOR 6. DISPLAY CONTROL PANEL PARTS LIST (see above)

  • Page 43: Control System Troubleshooting

    Electrical Compartment and Controls CONTROL SYSTEM TROUBLESHOOTING Issue: Resolutions: 1: No Display (Blank) Verify power 208 VAC or 240 VAC is going to oven. If not correct voltage supply. Does the control beep when any Key on the keypad is pressed? If no, check power going to the 24VDC power supply.
  • Page 44 TurboChef Technologies, Inc. C Series Defective Current Transformer on Computer Board SMT Board (T0265) Background: During the operation of the microwave system, the control board monitors current in the microwave circuit by means of a current transformer mounted on the controller board.
  • Page 45 CHAPTER 7 COOK DOOR ASSEMBLY...
  • Page 46 (CDP) and the other is called the monitor The Monitor Circuit consists of the Primary switch (CDM). The C3/C and C3/CMulti switch Interlock Switch, Secondary Interlock Switch, orientation is reversed, i.e., the monitor (CDM) Monitor Safety Switch, Monitor Relay and Trip and the primary switch (CDP) are located on the Coil.

  • Page 47: Chapter 7 Cook Door

    240V element is 12 ohms / current is 20amps. 208V element is 9 ohms / current is 23 amps. C3/C oven only: Check the 25 Amp fuse inline with the CB1 and the heater. Reference Chapter 8 Solid state contactor (K5) (See above for correct current draw.) The coil operates on 24v dc.

  • Page 48: Door Switch Adjustment

    RIGHT SIDE OF OVEN: Fig.7-4. Additionally, when the door is NOTE: The C3/C and C3/Cmulti oven switch closed, the trailing arms should “snap” arrangement is different from the C3/AB and the down into position. To test this, gentle pick C3Multi.
  • Page 49 Cook Door 13. Actuator tab should be positioned as shown 20. As the door is opened slowly confirm that in Figure 7-5. It should be parallel to the all three switches operate in the correct primary switch lever. Adjust and bend sequence, i.e.
  • Page 50 TurboChef Technologies, Inc. C Series Figure 7-3 Interlock Placement Differences C3/AB vs. C3/C...
  • Page 51 Cook Door TRAILING ARM AND CAM MOTION 1. CAM FOLLOWER ROLLER 2. TRAILING ARM NOTES: 3. IN DOOR CLOSED POSITION, THE TRAILING ARM SHOULD SEAT AS SHOWN ON THE CAM. NOTE: BOTH THE LEFT AND RIGHT SIDES SHOULD BE ADJUSTED SUCH EACH SIDE SEATS AS SHOWN. 4.
  • Page 53 Cook Door Figure 7-58: Interlock Switch Adjustment...

  • Page 54: Door Removal And Replacement

    TurboChef Technologies, Inc. C Series b) Slide the hinge bars (not shown) through DOOR REMOVAL AND the lower slots. Use caution in installing REPLACEMENT the door to avoid bending the hinge bars. If the bars bind in their slots, gently Tools Required: wiggle the door to free them.

  • Page 55: Chapter 7 Cook Door

    NOTE: Refer to page 7-5 for the final door oven flange on the C3/AB and C3Multi. switch adjustment. This adjustment is The C3/C and C3/CMulti gap should be completed after all door adjustment 0.060” (1.50 mm). Verify that one or steps have been completed.
  • Page 56 TurboChef Technologies, Inc. C Series FIGURE 7 – 6a C3/C & C3/Cmulti (Left Side) 7-12...
  • Page 57 See Figure 4-3 & 4-7a. ITEM Part Description Used on Model(s) Number T0538 TRAILING ARM GUIDE C3/AB, C3MULTI C0538 TRAILING ARM GUIDE C3/C, C3/CMULTI T0550 TRAILING ARM, RH C3/AB, C3MULTI C0550 TRAILING ARM, RH C3/C, C3/CMULTI T0529 INTERLOCK ACTUATOR BRACKET C3/AB, C3MULTI C0529-2...
  • Page 58 TurboChef Technologies, Inc. C Series DOOR REMOVAL AND REPLACEMENT PARTS LIST (LEFT SIDE) CON’T See Figure 4-7a. ITEM Part Description Used on Model(s) Number T0560 CAM FOLLOWER ASSY C3/AB, C3MULTI C0560 CAM FOLLOWER ASSY C3/C, C3/CMULTI T0541 CAM FOLLOWER ROLLER...
  • Page 59 Cook Door DOOR REMOVAL AND REPLACEMENT (RIGHT SIDE) 1. TRAILING ARM 2. INTERLOCK ACTUATOR BRACKET 3. INTERLOCK SECONDARY SWITCH 4. INTERLOCK SWITCH BRACKET 5. SPRING, TRAILING ARM 6. CAM FOLLOWER ROLLER 7. CAM FOLLOWER ASSY 8. HELPER SPRING FIGURE 7 – 6b Door Removal and Replacement (Right Side) 7-16...
  • Page 60 TurboChef Technologies, Inc. C Series DOOR REMOVAL AND REPLACEMENT PARTS LIST (RIGHT SIDE): See Figure 4-7b ITEM Part Description Used on Model(s) Number T0550 TRAILING ARM, RH C3/AB, C3MULTI C0550 TRAILING ARM, RH C3/C, C3/CMULTI T0529 INTERLOCK ACTUATOR BRACKET C3/AB, C3MULTI...
  • Page 61 27. N/A 12. HANDLE COOK CHAMBER 28. N/A 13. SCREW, M4 X 12MM SS 29. N/A 14. SPACER, DOOR HANDLE 30. ASSY GUIDE BLOCK 15. ASSY, ARM RH 16. WASHER, M4 SS Figure 7-8: C3/C and C3/CMulti Door Assembly 7-18...
  • Page 62 TurboChef Technologies, Inc. C Series C3/C AND C3/CMULTI DOOR ASSEMBLY PARTS: See Figure 4-8 Item Part Description Used on Model(s) Number C0190 SHUNT, DOOR C3/C & C3/CMULTI C0325 SEAL, ENVIRONMENTAL C3/C & C3/CMULTI C0427 SHUNT, SUPPORT, SHIM C3/C & C3/CMULTI SCREW, M4 X 12 MM SS C3/C &...
  • Page 63 Cook Door C3/C AND C3/CMULTI DOOR ASSEMBLY PARTS (CON’T): See Figure 4-8 Item Part Description Used on Model(s) Number C0508 ASSY BEARING BLOCK C3/C & C3/CMULTI C0507 PLATE, DOOR REINFORCING C3/C & C3/CMULTI SCREW, M4 X 16 MM SS C3/C & C3/CMULTI...
  • Page 64 TurboChef Technologies, Inc. C Series Figure 7-9: C3/AB and C3Multi Door Assembly 7-21...
  • Page 65 Cook Door C3/AB AND C3MULTI DOOR ASSEMBLY PARTS: See Figure 4-9 Item Part Description Used on Model(s) Number T0190 SHUNT, DOOR C3/AB and C3/Multi T0254 PLSTIC COVER, DOOR C3/AB and C3/Multi T0426 SHUNT SUPPORT DOOR C3/AB and C3/Multi T0193 OUTER SKIN, DOOR C3/AB and C3/Multi T0507 PLATE, DOOR REINFORCING...

  • Page 66: Convection Circuit

    CHAPTER 8 CONVECTION CIRCUIT...

  • Page 68: Catalytic Converter

    These decompositional derivatives generally have Shield may be inverted on some C3/AB units. All positive and negative effects on cooking; the C3/C units will have this assembly inverted). It is shorter chain derivatives add favorable flavor important to carefully remove the insulation and characteristics to the food, while the higher order replace it neatly.

  • Page 69: Convection Element And Thermocouples

    The temperature is referenced by two therefore, when replacing the single–phase open “K” type thermocouples. coil heater with this unit on the C3/AB or C3/C The HX thermocouple is in the rear of the • you must wire the individual heaters in parallel oven by the catalytic converter.

  • Page 70: Heater Circuit Defective Messages

    TurboChef Technologies, Inc. C Series Heater Circuit Defective Messages SELF TEST (STEST) WHILE COOKING CAUSE CORRECTIVE ACTION (WARMING UP) THERMO OPEN THERMO OPEN HX Thermocouple amplifier 1. Check Thermocouple connections on I/O board connector (See I/O board indicates open, (999°)."or"...
  • Page 71 HEATER ASSEMBLY (SEE FIG 5-3) FOR ALL OPTIONS INNER BRACKET CATALYTIC CONVERTER HEATER BAFFLE (C3/AB AND C3/C ONLY) FIGURE 8 - 1 Catalytic Converter Access Hi-Limit Thermostat (18) (HX)Thermocouple (17) FIGURE 8 - 2 Thermocouple & Thermostat Locations 8 - 5...
  • Page 72 9. HEATER ELEMENT, OPEN COIL 4. WASHER, FLAT, HEATER, 5/8 10. WAHER, SPLIT LOCK 8-32 (C3, C3/AB ONLY), M4 (C3/C) 5. WASHER, FIBER, 5/8 11. SCREW, #8-32 X .38 PPHD, CRES (C3, C3/AB ONLY), M4 X 10 (C3/C) 6. NUT, 5/8-18 CRES Note: TC3-0200 Kit Retrofit, Sheated Heater replaces the above obsolete model.
  • Page 73 100652-3 200 VAC SHEATHED HEATER All (200 VAC) 4,5,6 SHEATHED HEATER HARDWARE (SUPPLIED W/HEATER) TC3-0192 PLATE, C3 HEATER MOUTING (OBSELETE) C3/AB, C3/C TC3-0194 GASKET, 3 PHASE HEATER COVER 100665 240 VAC HEATER ELEMENT, OPEN COIL (OBSELETE) C3/AB, C3/C 100666 208 VAC HEATER ELEMENT, OPEN COIL (OBSELETE)

  • Page 75: Convection (Blower) Motor Operation

    Convection Circuit CONVECTION (BLOWER) MOTOR OPERATION The convection (blower) motor is a variable speed convection motor, which operates from zero rpm up to 7000 rpm. The blower motor speed is controlled by a SP200 AC/Delta drive control. The speed of the motor is directly proportional to the applied low voltage to the SP200 AC./Delta drive control from the control circuit card.

  • Page 76: Blower Circuit Defective Messages

    TurboChef Technologies, Inc. C Series Blower Circuit Defective Messages SELF TEST WHILE COOKING CAUSE CORRECTIVE ACTION 1) Verify jumper on P3 of control BLOWER STATUS BLOWER STATUS Blower motor speed board is present and placed or "F1 BLOWER" or "F1BLOWER"...

  • Page 77: Blower Motor Controller Fault Codes & Troubleshooting

    Convection Circuit Blower Motor Controller Fault Codes & Troubleshooting NOTE: If no fault condition exists, the LED will be green. If a fault condition exists, the LED will flash redhen a local keypad is not connected. All faults can be reset by cycling the reset control input, pressing the stop key, or cycling power, except as noted in the Corrective Action column below.
  • Page 78 TurboChef Technologies, Inc. C Series # of Fault Fault Cause Corrective Action Flashes Description Negative Slope • Conflicting parameter values • Adjust values of parameters P–50 through P–54 • Phase U • Verify output wiring is correct • Verify output phase is not •...

  • Page 79: Delta Blower Motor Controller Fault Codes & Troubleshooting

    Convection Circuit Delta Blower Motor Controller Fault Codes & Troubleshooting Fault Name Fault Descriptions Corrective Actions The AC drive detects an 1. Check whether the motors horsepower corresponds to abnormal increase in the AC drive output power. current. 2. Check the wiring connections between the AC drive and motor for possible short circuits.
  • Page 80 TurboChef Technologies, Inc. C Series Delta Blower Motor Controller Fault Codes & Troubleshooting Fault Name Fault Descriptions Corrective Actions Over-current during acceleration: 1. Check for possible poor insulation at the 1. Short-circuit at motor output. output line. 2. Torque boost too high.
  • Page 81 Convection Circuit 0.52 MIN 0.150 MAX HEAT SLINGER TO PLATE FAN BLADE TO CAP CONVECTION MOTOR ASSEMBLY 1. MOTOR, 1 HP 7. CLAMP, BEARING SPRING 2. SPACER, BLOWER MOUNT 8. BLOCK, BLOWER BEARING SEAL 3. CAP, BLOWER 9. SPRING, COMPRESSION 4.

  • Page 82: Convection Motor Parts List

    TurboChef Technologies, Inc. C Series CONVECTION MOTOR PARTS LIST: See Figure 5-6 Item Part Description Used on Model(s) Number C0299 ASSEMBLY, BLOWER MOTOR T0076 Motor, 1HP, Mac 6050070 RING FAN (unwelded) 6050069 BLADE, FAN (unwelded) 4&5 TC3-0214 RING AND FAN TACK WELDED...
  • Page 83 This page intentionally left blank.

  • Page 85: Microwave Circuit

    CHAPTER 9 MICROWAVE CIRCUIT...

  • Page 86: Measuring For Microwave Radiation Leakage

    TurboChef Technologies, Inc. C Series MEASURING FOR MICROWAVE RADIATION LEAKAGE The following RF emissions test must be The tip of the probe should be touching performed every time a service call is done on the oven surface being measured with the a C3 SERIES oven.

  • Page 87: Microwave Circuit Defective Messages

    Microwave Circuit Microwave Circuit Defective Messages SELF TEST WHILE COOKING CAUSE CORRECTIVE ACTION LOW MAG CURR LOW MAG CURR Oven CT1 (computer board 1. Check main internal circuit current sensor) breaker. .If tripped, check the *HV BREAKDOWN *HV BREAKDOWN detect current following operation: F3 MAG CURR...
  • Page 88 TurboChef Technologies, Inc. C Series...
  • Page 89 Microwave Circuit MAGNETRON CIRCUIT The Monitor Circuit consists of the Primary Overview of a microwave circuit Interlock Switch, Secondary Interlock Switch, The microwave circuit consists of a magnetron Monitor Safety Switch, Monitor Relay and the trip and a voltage doubler circuit. The voltage doubler coil on the 35A circuit breaker.

  • Page 90: Magnetron High Voltage Power Supply

    Microwave Circuit Magnetron High Voltage Transformer (102093) magnetron power changes due to input voltage The magnetron transformer is a ferro-resonant changes. automatic resetting over- design which limits fault currents and minimizes temperature switch is embedded in the high voltage secondary winding and removes power form the primary winding if an over-temperature condition occurs.
  • Page 92 TurboChef Technologies, Inc. C Series Filament Transformer(102091) Background: Step 3: Press and release immediately the MGTRON key and observe the voltage at The filament transformer is a step down voltmeter, reading should be around 4.6VAC. transformer from 208-240VAC to about 4-5VAC.

  • Page 93: Magnetron Testing

    Microwave Circuit MAGNETRON TESTING Checking a Magnetron for Open or Shorted WARNING!! Filaments: The microwave circuit cannot be worked 1. Disconnect power source on with the unit on. The unit must be discharge the High Voltage Capacitors. disconnected from the power source. 2.

  • Page 95: Component Testing (Diode, Capacitor, Transformer)

    Microwave Circuit COMPONENT TESTING TRANSFORMER TESTING WARNING!! The microwave circuit cannot be serviced 1. Disconnect the power source and discharge with the unit on. The unit must be the capacitor. disconnected from the power source. 2. Isolate the transformer from the circuit. (Wires Failure to do so could result in injury or are labeled but remember where they go) death.
  • Page 96 TurboChef Technologies, Inc. C Series WARNING!! Use extreme caution when taking any current readings. Failure to do so can result in death or serious injury. 820MW3 ANODE TRANSFORMER FILAMENT TRANSFORMER (4-5) 4.6 VAC SECONDARY 0.20 OHMS (3-4) UNUSED FILAMENT WINDING...
  • Page 98 TurboChef Technologies, Inc. C Series Waveguide Components: Figure 9-6: Waveguide Assy 9-11...
  • Page 99 Description Used on Model(s) Number T0266 BLADE, STIRRER T0289 SHAFT, STIRRER C3/AB, C3MULTI C0289 SHAFT, STIRRER C3/C, C3/CMULTI T0290 HUB, STIRRER SHAFT C3/AB, C3MULTI C0290 HUB, STIRRER SHAFT C3/C, C3/CMULTI T0282 SPROCKET, STIRRER SHAFT, .125 BORE T0284 BELT, STIRRER MOTOR...

  • Page 100: Waveguide Components Parts List

    TurboChef Technologies, Inc. C Series WAVEGUIDE COMPONENTS PARTS LIST (con’t): See Figure 9-6 Item Part Description Used on Model(s) Number WASHER, INTERNAL, LOCK, M4 SS C3/C, C3/CMULTI 700-1339-1 CLAMP, WAVEGUIDE, SINGLE WIRE C3/AB, C3MULTI C700-1339-1 CLAMP, WAVEGUIDE, SINGLE WIRE C3/C, C3/CMULTI...

  • Page 101: (Smt)I/O Board & Schematics

    CHAPTER 10 I/O Board & Schematics...
  • Page 102 TurboChef Technologies, Inc. C Series 10-2...
  • Page 103 10-5...
  • Page 104 TurboChef Technologies, Inc. C Series 10-4...
  • Page 105 (8130F-44-93) 820MW4 K4(MAGA) K1(MAG FAN) 10-5...
  • Page 106 TurboChef Technologies, Inc. C Series 1- Software EPROM 2- R51 Beeper Volume Adjustment 3- Microprocessor 4- P3- Blower Motor Controller Mode Selector SP200=1&2 5- R24- RF Fluctuation Adjustment (Optional) 6- R42- 5 Volt Reference Adjustment 7- P1 +5VDC Reference Point...
  • Page 107 Microwave Circuit 8- J2 40 Pin Connector (Most signal wires are terminated here!) 9- J5 26 Pin Flat Cable (from front panel VFD) 10- J3 5 VDC Power Supply to Vacuum Fluorescent Display 11- J1 RF Cable Connection (Optional) 12- J6 RS232 Cable (Menu Download port) 13- J4 Keypad membrane cable 14- Interlock Relays (Primary and Secondary) 10-7...

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