Thermador SMW272 B, SMW272S, SMW272P, SMW272W Service Manual

Service Manual

STOP

COOK

TIME TIMER 1 TIMER 2

CLOCK

TIME

OVEN LIGHT

56 8 0

OFF

BAKE

SELF

BROIL

CLEAN

CONVECTIO

CONVECTION

ROAST

SENSOR

COOK

REHEAT

POWER

POP

LEVEL

CORN

123

5 6

708

CLOCK

TIMER

QUICK

FUNCTION

/LESS

MIN

KEY

SERVING

KEEP

TURBO

/WEIGHT

WARM

DEFROST

STOP/RESET START

Thermador® Built-In Oven

SMW272 B, SMW272S, SMW272W, SMW272P

for

Models:

SMW Oven

Table of Contents

Manual introduction

and Safety Precautions........................... 1 – 2

Microwave Oven Section: Specifications ....3

Removal from Cabinet...................................................4

Warning: Danbger of High 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 Diagrams......................................................11

Description of Operating Sequence .........................12

Cautions to be Observed

When T roubleshooting............................................14

Disassembly and Parts Replacement Procedure....16

Component T est Procedur e........................................18

Measurements and Adjustments ................................20

Procedure for Measuring

Microwave Energy Leakage ....................................21

Troubleshooting Guide ..........................................22-25

Parts List of Digital Programmer Circuit &

Schematic Diagrams...........................................26-29

Removing the Oven Temperature Sensor ...............40

Removing the Convection Bake Element ................41

Removing A Convection Fan Motor .........................42

Removing A Halogen Lamp Holder ..........................44

Removing the Control Panel and Display Head.....46

Removing the Oven Light Switch,

The Oven Door Latch Assembly ,

The Hi-Temp Cutout...............................................48

Removing the Relay Board..........................................50

Lower Oven Relay Board ............................................51

Removing the Air Switches .........................................52

Removing the Blower...................................................54

Removing the Lamp Transformer &

the Lower Oven Stalled Fan Relay .......................56

Removing the Lower Oven Door.............................57

Removing the Oven Door Gasket............................58

Removing the Oven Door Components.................59

Removing the “S” Oven Module................................60

Troubleshooting.............................................................61

Connectors.....................................................................65

Convection Oven Relay Board...................................68

Oven Relay Board Matrix............................................69

Error Code Messages...................................................71

Warming Drawer Section..........................31

Replace thermostat or On/off Switch......................32

Replace Heating Element:............................................33

Replace Liner Slides:.....................................................33

Warming Drawer Wiring Diagram ............................34

Lower Oven Section ...................................35

Symbols You Will See in the Manual..........................36

Serial Number/Data Sticker Location ......................37

Removing the Bake and Broil Elements, Catalyst ..38

Electronic Oven Control Test Modes.......................72

Sequence of Operation................................................75

Lower Oven....................................................................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 Oven Wiring Diagram

and Schematic................Foldout, inside back cover

Page 2

SMW Oven Service ManualIntroduction

SMW SERVICE MANU AL

This manual contains information that is necessary for servicing the Thermador® built-in electric ovens, models:

SMW272B, SMW272W, SMW272S, SMW272P

This manual, as well as the information contained in it, is designed to be used only by qualified authorized Thermador service personnel, familiar with and knowlegable of pr oper safety and servicing procedures and possessing high quality testing equipment associated with Micro wav e, gas and electrical appliance repiar.

Thermador recommends that customers DO NOT SERVICE THEIR OWN UNITS, due to the complexity and the risk of high-voltage electrical shock.

All individuals who attempt repairs by improper means or adjustment subject themselves and others to the risk of serious and fatal injury.

Use only genuine Thermador approved fdactory replacement components.

The information is organized to help the servicer easily find what is needed to repair the unit.

SAFETY PRECAUTIONS

PRECAUTIONS TO BE OBSERVED BEFORE AND DURING SERVICING TO

AVOID POSSIBLE EXPOSURE TO EXCESSIVE MICROWAVE ENERGY:

A. Do not operate or allow the oven to be operated with the door open. B. Make the following safety checks on all ovens to be serviced before activating the magnetron or

other microwave source, and make repairs as necessary.

(1) Interlock operation. (2) Proper door closing. (3) Seal and sealing surfaces (arcing, wear, and other damage). (4) Damage to or loosening of hinges and latches. (5) Evidence of dropping or abuse.

C. Before turning on microwave power for any service test or inspection within the microwave gener-

ating compartments, check the magnetron, wave guide or transmission line, and cavity for proper alignment, integrity, and connections.

D. Any defective or misadjusted components in the interlock, monitor, door seal and microwave gen-

eration and transmission systems shall be repaired, replaced, or adjusted by pr ocedur es described in this manual before the oven is released to the owner.

E. A microwave leakage check to verify compliance with the Federal performance standard should be

performed on each oven prior to release to the owner.

F. Operate the oven from a properly grounded AC outlet capable of supplying 120/240 or a 120/208

volt, 60Hz.

Page 1

SMW Oven Service ManualIntroduction

708

5 6

123

SENSOR REHEAT

SENSOR

COOK

POWER LEVEL

POP

CORN

TIMER

CLOCK

MORE /LESS

QUICK

MIN

FUNCTION

KEY

SERVING /WEIGHT

KEEP WARM

TURBO DEFROST

STOP/RESET START

INTRODUCTION

Model SMW272

Model SMW272 is desigmed with modular construction which makes it easier to service. The SMW Oven has a microwave section that is enclosed in the structure. The microwave section can be pulled out to service additionally, it has a warming drawer built into the structure below the microwave section. It does not need to be removed for service. All service can be performed from the front. The lower oven is an “S” oven with single “S” oven controls.

1 2

1 Time of Day Clock and Lower Oven

Display Window

2 Touch Pads for Lower Oven

COOK TIME

TIMER 1 TIMER 2

CLOCK

STOP

TIME

OVEN

LIGHT

OFF

BAKE

SELF

BROIL

CLEAN

CONVECTION

ROAST

3 Microwave Oven Section

4 Warming Drawer Section

5 Oven Cooling Vents

6 Lower Convection Oven Section

7 Lower Oven Exhaust Vent

Page 2

SMW Oven Service ManualMicrowave Oven Section

Micr o wav e Oven Section

STOP

COOK TIME

TIMER 1 TIMER 2

CLOCK

TIME

OVEN

LIGHT

CONVECTION

OFF

BAKE

SELF

BROIL

CLEAN

CONVECTION

ROAST

SENSOR

COOK

REHEAT

POWER

POP

LEVEL

CORN

123

5 6

708

CLOCK

TIMER

QUICK

FUNCTION

/LESS

MIN

KEY

SERVING

KEEP

TURBO

/WEIGHT

WARM

DEFROST

STOP/RESET START

Specifications

Models: Power Source: 120 VAC Single Phase, 60 Hz Power Requirements: 1420W (12.1A) Output: 1100W Micro wave F requency: 2,450MHz Timer: 30 min. /stage (HIGH Power) – 5 Stage Maximum

99 min. 99 sec. /stage (Other Power Levels) 3 Stage Maximum

Oven Cavity Size: 2.1 cu. ft. Inside Dimensions: 18-7/16" (W) X 181/2" (D) X 1011/16" (H)

(W x D x H) 469mm (W) X 470mm (D) X 271 mm (H) Weight: 40 Ibs/18.1 kg Inverter Power Supply Output power: IEC705-88 Test procedure

Specifications subject to change without notice

Page 3

To remo ve microwave section from cabinet:

1) Using both hands, pull the sides of the frame forward and unsnap the posts on both sides of the frame from the catches on the enclosure (See Illustrations, below).

2) Remove the two screws holding the microwave section in the enclosure.

3) Pull the microwave section out of the cabinet half way.

4) Disconnect the electrical cord (Top left, back corner) and remove the microwave section all the way out of the enclosure.

Electrical

Cord

(Step 4)

SMW Oven Service ManualMicrowave Oven Section

Screws

(Step 2)

Visible after Frame removal

➞

Frame

removal

Pull with both hands;

unsnap posts at each corner

(Step 1).

➞

Screws

(Step 2)

Post (Step 1)

➞

Catch

(Step 1)

Page 4

SMW Oven Service ManualMicrowave Oven Section

Thermador Customer Service 5551 McFadden Ave. Huntington Beach, CA 92646 800/735-4328

Page 5

Microwa v e Contr ol P anel

Beep Sound

When a pad is pressed correctly, a beep will be heard. If a pad is pressed and no beep is heard, the unit did not or cannot accept the instruction. The oven will beep twice between programmed stages. At the end of any complete program, the oven will beep 5 times.

Sensor Reheat Pad

Automatically reheats.

Three different categories.

Power Level Pad

Manually changes Microwave power.

SENSOR

REHEAT

POWER

LEVEL

SMW Oven Service ManualMicrowave Oven Section

Display Windo w

Sensor Cook Pad

SENSOR

COOK

POP

CORN

Automatically calculates cooking time for six different items.

Popcorn Pad

Automatically timed by weight.

Number Pads

Timer Pad

Counts down and signals end time. Can be used for delay or stand time.

More/Less Pad

Increases or decreases cooking time for Sensor Cook or Sensor Reheat.

Stop/Reset Pad

Before cooking: One tap clears your instruction. During cooking: one tap temporarily stops to cooking process. Another tap cancels all your instructions and time of day or colon appears on the Display Window .

TIMER

MORE /LESS

SERVING

/WEIGHT

STOP/RESET START

5 6

QUICK

MIN

KEEP

WARM

CLOCK

FUNCTION

KEY

TURBO

DEFROST

Time of Day Clock Pad

Quick Minute Pad

Adds or sets time in 1 minute increments, up to 10 minutes.

Function Key Pad

Selects the noncooking features, i.e. Child Lock, etc.

Keep W arm Pad

Three different foods can be kept warm for 30 minutes after cooking.

Turbo Defrost

Defrosts by weight.

Start Pad

One tap allows oven to begin functioning. If door is opened or Stop/Reset Pad is pressed once during oven operation. Start Pad must be pressed again to restart oven.

Page 6