Thermador SMW 272 B, Service Manual, Page: 2 / 84

Page 2
SMW Oven
Table of Contents
Manual introduction
and Safety Precautions........................... 1 – 2
Microwave Oven Section: Specifications .... 3
Removal from Cabinet ................................................... 4
W arning: D anbger of H igh Voltage .............................. 5
Microwave Control Panel .............................................. 6
Precautions to Avoid Exposure to
Excessive Miocrowave Energy ................................. 7
Circuit Test Procedure ............................................ 8 – 9
to Use Function Pad ..................................................... 10
Schematic D iagrams...................................................... 11
D escription of O perating Sequence ......................... 12
Cautions to be O bserved
W hen Troubleshooting............................................ 14
D isassembly and Parts Replacement Procedure .... 16
Component Test Procedure ........................................ 18
Measurements and Adjustments ................................ 20
Procedure for Measuring
Microwave Energy Leakage .................................... 21
Troubleshooting Guide ..........................................22-25
Parts List of D igital Programmer Circuit &
Schematic D iagrams...........................................26-29
W arming Drawer Section .......................... 31
Replace thermostat or O n/off Switch ...................... 32
Replace H eating Element:............................................ 33
Replace Liner Slides: ..................................................... 33
W arming D rawer W iring D iagram ............................ 34
Lower Oven Section ................................... 35
Symbols You W ill See in the Manual ..........................36
Serial N umber/D ata Sticker Location ...................... 37
Removing the Bake and Broil Elements, Catalyst .. 38
Removing the O ven Temperature Sensor ...............40
Removing the Convection Bake Element ................41
Removing A Convection Fan Motor .........................42
Removing A H alogen Lamp H older ..........................44
Removing the Control Panel and D isplay H ead ..... 46
Removing the O ven Light Switch,
The O ven D oor Latch Assembly,
The H i-Temp Cutout ............................................... 48
Removing the Relay Board ..........................................50
Lower O ven Relay Board ............................................ 51
Removing the Air Switches .........................................52
Removing the Blower ...................................................54
Removing the Lamp Transformer &
the Lower O ven Stalled Fan Relay ....................... 56
Removing the Lower O ven D oor ............................. 57
Removing the O ven D oor Gasket ............................ 58
Removing the O ven D oor Components................. 59
Removing the “S” O ven Module ................................ 60
Troubleshooting............................................................. 61
Connectors..................................................................... 65
Convection O ven Relay Board................................... 68
O ven Relay Board Matrix ............................................ 69
Error Code Messages...................................................71
Electronic O ven Control Test Modes.......................72
Sequence of O peration ................................................ 75
Lower O ven.................................................................... 75
Bake Cycle — Bake Preheat and Bake Mode ......... 75
Broil Cycle — Broil Preheat and Broil Mode ......... 76
Convection Cycle – Convection Preheat
and Convection Mode ............................................. 77
Convection Roast Preheat ..........................................78
Convection Roast Cycle .............................................. 79
Self-Clean Cycle — Preheat below 840˚ ................. 80
Self-Clean Cycle ............................................................. 81
Lower O ven W iring D iagram
and Schematic................ Foldout, inside back cover
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