CM Oven Service Manual
Lit. No. 94-30-006B
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 Troubleshooting ................ 4
Avoid Electrical Shock .................................................... 5
Measuring For Microwave Radiation Leakage ............ 6-7
Thermador Warranty ....................................................... 8
Servicing Components ..................................................... 9
Component Locations .......................................................... 9
Removing Trim, & Top Plenum Covers ............................. 10
Removing Electronic Oven Control Board ........................ 11
Removing Fuseblock & Microwave PCB Control .............. 12
Removing Light Transformer
& Double Line Break Relay ............................................... 13
Removing Stirrer Motor ..................................................... 14
Removing Transformer Cooling Fan & Microwave
Transformer Air Switch Assembly ..................................... 15
Removing Magnetron Fan Assembly ................................ 16
Removing Crossflow Top Cooling Blower ......................... 17
Removing High Voltage Microwave Capacitor .................. 18
Removing High Voltage Diode .......................................... 19
Removing High Voltage Microwave Transformer ........ 20-21
Removing Magnetron, & Magnetron Thermal Cutout .. 22-23
Removing Control Panel Assembly,
Display Board, & Touch Panel Glass ................................ 24
Removing Upper (Or Single) Oven Door Switch .............. 25
Removing Door Latch Assembly, High-Temp Cutout, &
Monitor & Secondary Switch Assembly ....................... 26-27
Removing A Halogen Light Assembly .......................... 28-29
Removing Broil Element & Stirrer Blade Assembly ..... 30-31
Removing Waveguide .................................................. 32-33
Removing Convection Element & Motor ...................... 34-36
Removing Meat Probe Jack .............................................. 37
Removing Hidden Bake Element ................................. 38-39
Removing Oven Thermal Sensor ...................................... 40
Removing Upper (Or Single) Oven Door Gasket .............. 41
Removing, Reinstalling Microwave Oven Door ............ 42-44
Removing Upper (Or Single) Oven Door Handle & Outer
Glass Assembly ................................................................. 45
Removing An Oven Door Hinge, Actuator Arm, Center
Glass, RF Screen, & Inner Glass ................................. 46-48
Troubleshooting ................................................................. 49
Testing Components, 20A Time-Delay Fuse ............... 49
Transformer Cooling Fan Motor ................................... 49
Light Transformer, Double Line Break Relay ............... 50
Stirrer Motor, High Voltage Diode ................................ 51
High Voltage Capacitor, High Voltage Transformer ..... 52
Magnetron, Magnetron Thermal Cutout (TCO) ............ 53
Magnetron Fan Motor, Crossflow Blower Motor .......... 54
Door Latch Assembly, Monitor & Secondary Switches 55
Door Switch, Oven Thermal Sensor ............................. 56
Broil Element, Bake Element ........................................ 57
Convection Element, Convection Motor ....................... 58
M/W Transformer Air Switch, Meat Probe Jack ........... 59
Microwave PCB Control ................................................ 60
Microwave Components Description ....................... 61-67
Interlock Switches .............................................................. 62
Latch Mounted switch ........................................................ 62
Oven Mounted switches .................................................... 63
Switches Activated by Hook .............................................. 64
20-Ampere Fuse, Fuse Failure .......................................... 65
Diode, High Voltage Transformer, Magnetron Tube ......... 66
Microwave Board, Stirrer Motor, Microwave
Transformer Cooling Fan & Air Switch .............................. 67
CM Lower Oven
.......................................
68-108
CM Relay Board Matrix ..................................................... 69
CM DAC Relay Board ................................................... 70-73
Wire Harnesses ............................................................ 74-75
Troubleshooting Chart for
Relay Board Headers Pin Failures ............................... 76-77
CM Oven Control Panel ..................................................... 78
Electronic Oven Controls ................................................... 79
Control Panel Assembly .................................................... 80
Glass Touch Panel ............................................................ 81
Display Head ..................................................................... 82
Troubleshooting Chart for
Display Head Pin Failures ................................................. 83
CM Lower Oven Illustration ............................................... 84
Removing Hidden Bake Element ................................. 85-86
Removing Oven Temperature Sensor .............................. 87
Removing Convection Bake Element ................................ 88
Removing Convection Fan Motor ................................. 89-90
Removing Halogen Lamp Holder ...................................... 91
Removing Lamp Transformer &
Lower Oven Double Line Break Relay .............................. 92
Removing Oven Light Switch, Oven Door Latch
Assembly and High Temp Cut-out ............................... 93-94
Removing Air Switches ................................................. 95-96
Removing a Blower ...................................................... 97-98
Removing Lower Oven Door ............................................. 99
Removing Oven Door Gasket ......................................... 100
Removing Oven Door Components ................................ 101
Removing Oven Module .................................................. 102
Troubleshooting ............................................................... 103
Blower Motor, Air Switch ............................................ 103
Convection Fan Motor, Lamp Transformer ................ 104
Oven Door Latrch Assembly ....................................... 105
Hidden Bake Element, Broil Element ......................... 106
Convection Bake Element, Hi-Temp Cutout .............. 107
Fault Codes ..................................................................... 108
Schematic & Wiring Diagrams
...............
109-113
CM301 Schematic Diagram ........................................ 109
CM301 Wiring Diagram .............................................. 110
CM302 Schematic Diagram ........................................ 111
CM302 Wiring Diagram .............................................. 112
CM301 Electronic Oven Control Wiring ...................... 113
CM302 Electronic Oven Control Wiring ...................... 113
