Wolf MWD24 Guide

Technical Service And Parts Manual
© WOLF APPLIANCE, INC. 2009 ALL RIGHTS RESERVED JOB AID #813632 Revision A - January 2009
Drawer Microwave
MODELS MWD24 & MWD30

1-1
General Information
Drawer Microwave
SECTION 1
GENERAL
INFORMATION

1-2
General Information Drawer Microwave
INTRODUCTION
This Wolf Drawer Microwave Technical Service and Parts Manual, Part #813632, has been compiled with information
provided by the Sharp Electronics Corporation. This manual provides the most recent technical service information
that will enable the service technician to troubleshoot and diagnose malfunctions, perform necessary repairs and
return a Wolf Drawer Microwave to proper operational condition.
The Service Technician should read the complete instructions contained in this manual before initiating any repairs on
a Wolf Appliance.
IMPORTANT SAFETY INFORMATION
Below are the Product Safety Labels used in this manual.
The “Signal Words” used are WARNING and
CAUTION.
Please note that these safety labels are placed in areas
where awareness of personal safety and product safety
should be taken and lists the precautions to be taken
when the signal word is observed.
Indicates that hazardous or unsafe practices could
result in minor personal injury, or product and/or
property damage.
INDICATES THAT HAZARDOUS OR UNSAFE
PRACTICES COULD RESULT IN SEVERE
PERSONAL INJURY OR DEATH.
In addition, please pay attention to the signal word
“NOTE”, which highlights especially important information
within each section.
TECHNICAL ASSISTANCE
If you should have any questions regarding a Wolf appli-
ance and/or this manual, please contact:
Wolf Appliance, Inc.
ATTN: Service Department
P.O. Box 44988
Madison, WI 53744-4988
Customer Service & Parts / Warranty Claims
Phone #: (800) 332 - 9513
Technical Assistance
Phone #: (800) 919 - 8324
Customer Service & Technical Assistance
Facsimile #: (608) 441 - 5887
Parts / Warranty Claims
Facsimile #: (608) 441 - 5886
Service Department e-mail Address
[email protected]
Office Hours:
7:00 AM to 7:00 PM Central Time
Monday through Friday
This manual is designed to be used by Authorized Service Personnel only. Wolf Appliance, Inc. assumes no
responsibility for any repairs made to Wolf appliances by anyone other than Authorized Service Technicians.

1-3
General Information
Drawer Microwave
TABLE OF CONTENTS
Section 1 - General Information
Introduction........................................................................ 1-2
Important Safety Information.............................................. 1-2
Technical Assistance.......................................................... 1-2
Table of Contents............................................................... 1-3
Warranty Information.......................................................... 1-4
Model Number Key............................................................. 1-5
Model Configurations......................................................... 1-6
Section 2 - Installation Information
Electrical Requirements..................................................... 2-2
Clearances and Dimensions ............................................. 2-3
Installation Procedures ...................................................... 2-4
Section 3 -Theory and Operation
User Operation .................................................................. 3-2
Set Clock ........................................................................... 3-2
Time Cooking .................................................................... 3-2
Setting Power Level .......................................................... 3-2
Sensor Cooking ................................................................. 3-3
Manual Defrost / Manual Cooking ..................................... 3-4
Add Minute ........................................................................ 3-5
More or Less Time Adjustment ......................................... 3-5
Demonstration Mode ........................................................ 3-5
Technical Operation .......................................................... 3-6
Schematic (Off Condition) ................................................. 3-7
Sensor Function ................................................................ 3-8
Sensor Circuit ................................................................... 3-9
Touch Panel Function ....................................................... 3-10
Description of LSI ............................................................. 3-11
Section 4 - Component Access and Removal
Warnings and Cautions..................................................... 4-2
Microwave Measurement Procedure ............................... 4-4
Touch Control Panel Servicing ......................................... 4-5
Drawer Microwave Disassembly ...................................... 4-6
Inner Drawer Removal ..................................................... 4-7
Choke Cover Removal ..................................................... 4-7
Rack Gear Removal ......................................................... 4-7
Control Panel Removal .................................................... 4-8
Cavity Light Replacement ............................................... 4-8
Power Cord Replacement ................................................ 4-9
Sensor, Stirrer Mtr, & Upper TCO .................................... 4-9
Auto Drawer Gear Removal ............................................. 4-10
Actuator Removal/Adjustment .......................................... 4-10
Latch Hook Assembly Removal ........................................ 4-11
Switch (Stop, Monitor, Secondary Interlock) Removal ..... 4-11
Switch (Stop, Monitor, Secondary Interlock) Adjustment . 4-12
Major Control Components .............................................. 4-13
Section 5 -Parts and Exploded Views
Parts List .......................................................................... 5-2
Exploded View ................................................................. 5-3
Section 6 - Troubleshooting Guide
Warnings and Cautions .................................................... 6-2
Microwave Measurement Procedure ................................ 6-3
Touch Control Panel Test .................................................. 6-4
Key Unit Test ..................................................................... 6-5
Relay Test ......................................................................... 6-5
Defrost Test ...................................................................... 6-6
Open Fuse On PWB ........................................................ 6-6
AH Sensor Test ................................................................ 6-7
Magnetron Assembly Test ................................................ 6-9
Thermal Cut-Out Test ....................................................... 6-10
Secondary Interlock Switch Test ...................................... 6-10
Stop Switch Test ............................................................... 6-10
Monitor Switch Test .......................................................... 6-10
Blown Monitor Fuse Test .................................................. 6-11
Power Transformer Test ................................................... 6-11
Section 7 - Wiring Diagrams
Harness Pinout Wiring ...................................................... 7-2
Power Unit Circuit ............................................................. 7-3
Power Unit Printed Circuit Board ...................................... 7-4
Control Unit Circuit ............................................................ 7-5
Control Unit Printed Circuit Board ...................................... 7-6

1-4
General Information Drawer Microwave
WARRANTY INFORMATION
This page contains a summary of the 2 & 5 Year Warranty that is supplied with every Wolf product, followed by a Non
Residential Warranty Summary and then notes about the warranties.
TWO & FIVE YEAR Warranty Summary
Two year TOTAL PRODUCT warranty, parts and labor.•
Limited Parts Only Warranty for the 3rd through 5th year on the following parts: Transformer, Magnetron,•
Capacitor, Rectifier, Electronic Control System, etc.
NOTE: This warranty only applies to products installed for normal residential use in the United States or Canada.
NON RESIDENTIAL Warranty Summary
Two year TOTAL PRODUCT warranty, parts and labor.•
NOTE: This warranty only applies to products installed in test kitchens, culinary and school kitchens, and other
installations which help promote Wolf Appliance products. Restaurant installations and other similar commercial
applications carry no warranty.
Warranty Notes:
All warranties begin at the time of the unit’s initial installation.•
All Warranty and Service information collected by Wolf Appliance, Inc. is arranged and stored under the unit•
serial number and/or the customer’s name. It is requested that you have the model and serial number available
whenever contacting the factory or parts distributor.
See Figure 1-1 for Rating Plate layout and location.•
Figure 1-1 Rating Plate Location
Rating plate: Open the drawer
fully. The label is slightly beyond
the back wall of the microwave
cavity facing up from the flat
surface.

1-5
General Information
Drawer Microwave
DRAWER MICROWAVE FEATURES
Built-in microwave oven with•
950 watts of power
30” (762) model allows micro-•
wave to be built in to fit below a
Wolf built-in E-Series oven
Classic stainless steel finish•
Sensor cooking•
Micro warm allows you to keep•
food warm up to 30 minutes
Easy-to-operate control panel•
and 11 programmable power
levels (See Figure 1-2)
Interactive display—99 minutes,•
99 seconds
Oven drawer with window•
Control lock•
Oven light comes on when oven is operating or drawer is open•
Tight drawer seals with automatic drawer open/close•
VISUAL DISPLAY
SETUP/HELP
pad
SENSOR
POPCORN
pad
SENSOR
REHEAT
pad
SENSOR
COOK
pad
OPEN
pad
Visual
display
START/ADD
MINUTE pad
POWER LEVEL
pad
CONTROL
LOCK pad
MICRO
WARM
pad
DEFROST
pad
REHEAT
pad
CLOSE
pad
STOP/CLEAR
pad
TIMER/CLOCK
pad
Figure 1-2 Touch Control Panel
Control Panel
Menu Label
Sealing Surfaces
Drawer Guides
Vent
Light
Waveguide Cover
(DO NOT REMOVE)

1-6
General Information Drawer Microwave
COOKWARE SUGGESTIONS
NOTE: Make sure the utensil does not touch the interior
walls during cooking.
Use these utensils for safe microwave cooking and
reheating:
Glass ceramic•
Heat-resistant glass•
Microwave-safe plastics•
Microwave-safe paper plates•
Microwave-safe pottery, stoneware and porcelain•
Browning dish (Do not exceed recommended•
preheating time. Follow manufacturer’s directions.)
These items can be used for short time reheating of
foods that have little fat or sugar in them:
Wood, straw, wicker•
DO NOT USE:
Metal pans and bake-ware•
Dishes with metallic trim•
Non-heat-resistant glass•
Non-microwave-safe plastics (margarine tubs)•
Recycled paper products•
Brown paper bags•
Food storage bags•
Metal twist-ties•
NOTE: To check if a dish is safe for microwaving, place
the empty dish in the oven and microwave on HIGH for
30 seconds. If the dish becomes very hot, DO NOT use it
for microwaving.
RADIO OR TV INTERFERENCE
Should there be any interference caused by the drawer
microwave to your radio or TV, check that the drawer
microwave is on a different electrical circuit, relocate the
radio or TV as faraway from the drawer as feasible or
check position and signal of receiving antenna.
CLEANING AND CARE
Stainless Steel Surface
The exterior should be wiped often with a soft damp
cloth and polished with a soft dry cloth to maintain its
beauty. There are also a variety of products designed
especially for cleaning and shining the stainless exterior
of the oven. We recommend that the cleaner be applied
to a soft cloth and then carefully used on the stainless
exterior rather than sprayed directly on to it. Follow
package directions carefully.
Front Side of Drawer
Wipe the window on both sides with a soft damp cloth to
remove any spills or spatters. Metal parts will be easier to
maintain if wiped frequently with a soft damp cloth. Avoid
the use of spray and other harsh cleaners as they may
stain, streak or dull the door surface.
Touch Control Panel
If desired, the touch pads may be deactivated before
cleaning. See the CONTROL LOCK information on page
25 of this manual. Wipe the panel with a cloth dampened
slightly with water only. Dry with a soft cloth. Do not scrub
or use any sort of chemical cleaners. Close door and
follow directions on page 25 for turning CONTROL LOCK
off. Touch STOP/CLEAR.
Interior
Cleaning is easy because no heat is generated to the
interior surfaces; therefore, there is no baking and setting
of spills or spattering. To clean the interior surfaces,
including drawer sealing surfaces, wipe with a soft damp
cloth. Do not use abrasive or harsh cleaners or scouring
pads. For heavier soil, use mild soap; wipe clean with a
soft damp cloth. Do not use any chemical oven cleaners.
Drawer Guides
Remove the food crumbs from the drawer guides.
Wipe with a soft dry cloth in order to keep the drawer
microwave opening and closing smoothly.
Odor Removal
Occasionally, a cooking odor may remain in the drawer
microwave. To remove, combine 1 cup (250 ml) water,
grated peel and juice of one lemon and several whole
cloves in a 2-cup(500 ml) glass measuring cup. Boil for
several minutes using 100% power. Allow to set in the
drawer microwave until cool. Wipe interior with a soft
cloth.

2-1
Installation Information
Drawer Microwave
2-1
SECTION 2
INSTALLATION
INFORMATION

2-2
Installation Information Drawer Microwave
Neutral
INSTALLATION INFORMATION
Below are the Product Safety Labels used in this manual. This section of the manual covers some of the installation
issues that a service technician may need to know when servicing a Wolf Drawer Microwave. If additional installation
information is needed, after reviewing this section of the manual, please refer to the installation guide or contact the
Wolf Appliance Customer Service Department.
TO REDUCE THE RISK OF TIPPING, THE DRAWER MICROWAVE MUST BE SECURED BY A PROPERLY•
INSTALLED ANTI-TIP BLOCK.
STEPPING, LEANING OR SITTING ON THE DRAWER MAY RESULT IN SERIOUS INJURIES AND CAN ALSO•
CAUSE DAMAGE TO THE DRAWER MICROWAVE.
FOR SAFETY CONSIDERATIONS DO NOT INSTALL DRAWER IN ANY COMBUSTIBLE CABINETRY, WHICH•
IS NOT IN ACCORD WITH THE STATED CLEARANCES AND DIMENSIONS PROVIDED IN PRODUCT
INSTALLATION INSTRUCTIONS.
NEVER LEAVE CHILDREN ALONE OR UNATTENDED IN THE AREA WHERE A DRAWER MICROWAVE IS IN•
USE. NEVER LEAVE THE DRAWER OPEN WHEN THE MICROWAVE IS UNATTENDED.
DO NOT USE THE DRAWER MICROWAVE AS A STORAGE SPACE. THIS CREATES A POTENTIALLY•
HAZARDOUS SITUATION. CHECK THAT THE TIME-OF-DAY IS IN THE DISPLAY. IF NOT, TOUCH STOP/
CLEAR TO PREVENT UNINTENDED USE.
THIS DRAWER MICROWAVE MUST BE ELECTRICALLY GROUNDED IN ACCORDANCE WITH LOCAL•
CODES.
DO NOT USE AN EXTENSION CORD. IF THE POWER SUPPLY CORD IS TOO SHORT, HAVE A QUALIFIED•
ELECTRICIAN OR SERVICEMAN INSTALL AN OUTLET NEAR THE APPLIANCE.
Electrical Requirements
This appliance must be grounded. The drawer microwave
is equipped with a cord having a grounding wire with a
grounding plug. It must be plugged into a wall receptacle
that is properly installed and grounded in accordance
with the National Electrical Code and local codes and
ordinances. In the event of an electrical short circuit,
grounding reduces risk of electric shock by providing an
escape wire for the electric current.
120 volt 60Hz, AC only, 15 amp protected electrical•
supply.
Separate electrical circuit serving only this appliance.•
A properly grounded 3-prong receptacle. (See Figure•
2-1)
Figure 2-1 Grounded Receptacle
Grounding Prong
Line
Voltage
(Power)
Ground

2-3
Installation Information
Drawer Microwave
15” (381)
Auto Drawer
Opening
14 19/32"
(371)
11/8" (29)
DOOR
THICKNESS
23 3/8"
(594)
23 7/8"
(606)
15 13/32"
(391)
123/32" (44)
411/16" (119)
21 19/32" (548)
Figure 2-2 24” Drawer Microwave Dimensions
1413/16"(376)
TO BOTTOM
OF ANTI-TIP
BLOCK
ANTI-TIP
BLOCK
31/2"
(89)
FLOOR MUST
SUPPORT
100 LBS
(45 kg)
19" (483)
TO TOP
OF FLOOR
ALLOW
7/16"(11)
OVERLAP
ALLOW
3/16"(5)
OVERLAP
1413/16"(376)
OPENING
6"
(152)
ALLOW
7/8"(22)
OVERLAP
221/8"(562)
OPENING
4"
(102)
5" (127)
231/2"(597)
DEPTH MIN
ELECTRICAL OUTLET
LOCATION
36" (914)
COUNTERTOP
HEIGHT
24" (610)
CABINET MIN
ALLOW
7/8"(22)
OVERLAP
Figure 2-4 24” Drawer Microwave Install Specifications
Clearances and Dimensions
Dimensions shown on this page must be used. Given•
dimensions provide minimum clearance. Locate
electrical outlet in the shaded area in the upper left
hand corner of the cutout. See Figures 2-4 & 2-5
NOTE: The drawer microwave can also be installed
using an electrical outlet in an adjacent cabinet within
the area where the provided electrical cord can reach.
Power cord access hole in cabinet should be a minimum
11/2”(38) diameter hole and de-burred of all sharp edges.
NOTE: Always allow sufficient power cord length to the
electrical outlet to prevent tension.
Contact surface must be solid and level. Pay•
special attention to the floor on which the drawer
microwave will sit. The floor of the opening should be
constructed of plywood strong enough to support the
weight of the oven, about 100 pounds (45 kg).
Check location where the drawer microwave will be•
installed for proper electrical supply.
Your oven can be built into a cabinet or wall by itself•
or under a gas or electric wall oven.
Be sure that the clearance of the floor between the•
wall oven and the drawer microwave is a minimum of
2” (51).
The microwave interior will easily accommodate a 9”•
(229) x 13” (330) oblong dish or a bag of microwave
popcorn.
14 19/32"
(371)
11/8" (29)
DOOR
THICKNESS
23 3/8"
(594)
29 7/8"
(759)
15 13/32"
(391)
2" (51)
411/16" (119) 281/8" (714)
15” (381)
Auto Drawer
Opening
Figure 2-3 30” Drawer Microwave Dimensions

2-4
Installation Information Drawer Microwave
Figure 2-5 30” Drawer Microwave Install Specifications
1413/16"(376)
TO BOTTOM
OF ANTI-TIP
BLOCK
OPTIONAL
WALL OVEN
CUTOUT
ANTI-TIP
BLOCK
31/16"
(78)
FLOOR MUST
SUPPORT
100 LBS
(45 kg)
19" (483)
TO TOP OF FLOOR
(RECOMMENDED)
ALLOW
7/16"(11)
OVERLAP
ALLOW
3/16"(5)
OVERLAP
1413/16"(376)
OPENING
2" (51) MIN
6"
(152)
ALLOW
3/4"(19)
OVERLAP
ALLOW
3/4"(19)
OVERLAP
287/16"(722)
OPENING
4"
(102)
5" (127)
231/2"(597)
DEPTH MIN
ELECTRICAL
OUTLET
LOCATION
84" (2134)
WALL
CABINET
30" (762)
CABINET MIN
1413/16"(376)
TO BOTTOM
OF ANTI-TIP
BLOCK
ANTI-TIP
BLOCK
31/2"
(89)
FLOOR MUST
SUPPORT
100 LBS
(45 kg)
19" (483)
TO TOP OF FLOOR
(RECOMMENDED)
ALLOW
7/16"(11)
OVERLAP
ALLOW
3/16"(5)
OVERLAP
1413/16"(376)
OPENING
6"
(152)
ALLOW
3/4"(19)
OVERLAP
ALLOW
3/4"(19)
OVERLAP
287/16"(722)
OPENING
4"
(102)
5" (127)
231/2"(597)
DEPTH MIN
ELECTRICAL OUTLET
LOCATION
36" (914)
COUNTERTOP
HEIGHT
30" (762)
CABINET MIN
Drawer Installation
Place the drawer adjacent to the wall or cabinet1.
opening. Plug the power supply cord into the electri-
cal outlet.
Carefully guide the drawer into the prepared opening.2.
Avoid pinching the cord between the oven and the
wall.
Slide the drawer all the way until the mounting flange3.
is flush with the face of the cabinet. See illustration
below.
Open the drawer. Using the 4 holes on the drawer4.
as a template, pre drill the cabinet using a 1/16” (1.6)
bit. See illustration below.
Secure the drawer with the 4 screws supplied. See5.
illustration below.
Figure 2-6 Drawer Installation

3-1
Theory of Operation
Drawer Microwave
3-1
SECTION 3
THEORY AND
OPERATION

3-2
Theory of Operation Drawer Microwave
USER OPERATION
BEFORE OPERATING
Before operating your new drawer microwave, make
certain you read and understand the operation
instructions completely.
Before the drawer microwave can be used, follow these
steps:
Plug in drawer microwave.1. enjoy your micro- wave
touch clear and touch clock will appear.
Touch the2. STOP/CLEAR pad. : will appear.
Set clock.3.
TO SET THE CLOCK
Touch1. TIMER/CLOCK pad and number 2.
Touch number pads for correct time of day and touch2.
TIMER/CLOCK pad again.
This is a 12 hour clock. If you attempt to enter an
incorrect clock time, will appear in the display. Touch the
STOP/CLEAR pad and re-enter the time.
If the electrical power supply to your drawer microwave
should be interrupted, the display will intermittently
show enjoy your micro- wave touch clear and
touch clock after the power is reinstated. If this occurs
during cooking, the program will be erased. The time of
day will also be erased. Simply touch the STOP/CLEAR
pad and reset the clock for the correct time of day.
NOTE: The drawer microwave can be programmed with
the drawer open except for START/ADD MINUTE.
TIMER
Touch1. TIMER/CLOCK pad and number 1.
Enter time.2.
Touch3. TIMER/CLOCK pad again. To cancel timer,
touch STOP/CLEAR pad.
STOP/CLEAR
Touch the STOP/CLEAR pad to:
Erase if you make a mistake during programming.•
Cancel timer.•
Stop the drawer microwave temporarily during timed•
cooking.
Return the time of day to the display.•
Cancel a program during cooking, touch twice for•
timed cooking.
OPEN/CLOSE DRAWER MICROWAVE
Always press the OPEN or CLOSE pad on the control
panel to open or close the drawer microwave.
Do not push or pull the drawer microwave by hand,
except in case of emergency, such as a power failure.
If necessary, push or pull slowly.
TIME COOKING
Your drawer microwave can be programmed for 99
minutes and 99 seconds (99.99). Always enter the
seconds after the minutes, even if they are both zeros.
Suppose you want to cook for 5 minutes at 100%.
Enter cooking time. 5 0 01.
5:00 touch start or touch power level
To cook at 100% power (High), touch2. START/ADD
MINUTE pad.
TO SET POWER LEVEL
There are eleven preset power levels. Using lower power
levels increases the cooking time which is recommended
for foods such as cheese, milk and long slow cooking
of meats. Consult a microwave cookbook or recipes for
specic recommendations.
Suppose you want to defrost for 5 minutes at 30%.
Enter defrost time 5 0 0.1. 5:00
Touch2. POWER LEVEL pad 8 times.
Touch3. START/ADD MINUTE pad.
Touch Power
Level Pad % Power Level
1 time 100% High
2 times 90%
3 times 80%
4 times 70% Medium High
5 times 60%
6 times 50% Medium
7 times 40%
8 times 30% Med. Low/Defrost
9 times 20%
10 times 10% Low
11 times 0%

3-3
Theory of Operation
Drawer Microwave
SENSOR COOKING
Wolf’s sensor is a semi-conductor device that detects the
vapor (moisture and humidity) emitted from the food as it
heats. The sensor adjusts the cooking times and power
levels for various foods and quantities.
USING SENSOR SETTINGS
After the drawer microwave is plugged in, wait 2•
minutes before using any SENSOR setting.
Be sure the exterior of the cooking container and the•
interior of the drawer microwave are dry. Wipe off any
moisture with a dry cloth or paper towel.
The sensor works with foods at normal storage•
temperature. For example, popcorn would be at room
temperature.
Any SENSOR selection can be programmed with•
More or Less Time Adjustment. See page 3-5.
More or less food than the quantity listed in the•
Sensor Cooking Guide should be cooked following
the guidelines in any microwave cookbook.
During the rst part of sensor use, the food name•
will appear on the display. Do not open the drawer
microwave or touch STOP/CLEAR during this
part of the cycle. The measurement of vapor will
be interrupted. If this occurs, an error message
will appear. To continue cooking, touch the STOP/
CLEAR pad and cook manually.
When the sensor detects the vapor emitted from the•
food, the remainder of cooking/reheating time will
appear. The drawer microwave may be opened when
the remaining time appears on the display. At this
time, you may stir or season food, as desired.
If the sensor does not detect vapor properly when•
popping popcorn, the oven will turnoff, and the time
of day will be displayed. If the sensor does not detect
vapor properly when cooking other foods, error will
be displayed, and the microwave will turn off.
Check food temperature after cooking. If additional•
time is needed, continue to cook manually.
Each food has a cooking hint. Touch the• HELP pad
when the HELP indicator is lighted in the display.
COVERING FOODS
Some foods work best when covered. Use the cover
recommended in the Sensor Cooking Guide for these
foods. Be careful when removing any covering to allow
steam to escape away from you. You may refer to the
hints by touching the HELP pad. (See Use and Care
Manual)
SENSOR POPCORN / SENSOR REHEAT
You can pop popcorn and reheat many foods and don’t
need to calculate cooking time or power level.
Touch SENSOR POPCORN or SENSOR REHEAT and
START/ADD MINUTE pad.
When the sensor detects the vapor emitted from the
food, the remainder of cooking/reheating time will appear.
NOTE: The SENSOR POPCORN setting has 2 choices.
Follow directions in the display to choose desired option.
TO SENSOR COOK:
Touch1. SENSOR COOK pad once. see label
select food number
See Menu Label. Select desired food by touching2.
number pad. Example: Touch 5 for baked potatoes.
Touch3. START/ADD MINUTE pad.
NOTE: To heat or cook other foods or foods above or
below the quantity allowed on the Sensor Cooking
Guide (See Use and Care Manual), cook manually.
DEFROST
Use this feature to defrost the foods shown in the Defrost
Guide. (See Use and Care Manual)
Touch1. DEFROST pad. see label select food
number
See Menu Label. Select desired food by touching2.
the number pad. Example: Touch 2 for steaks/chops.
steaks chops enter weight
Enter weight by touching number pads.3. 1.0 lb
Touch4. START/ADD MINUTE pad. The oven will stop
so that the food can be checked.
After the rst stage, open the drawer microwave.5.
Turn steak over and shield any warm portions. Close
the drawer microwave. Touch START/ADD MINUTE
pad.
After the second stage, open the drawer microwave.6.
Shield any warm portions. Close the drawer
microwave. Touch START/ADD MINUTE pad.
After defrost cycle ends, cover and let stand as7.
indicated in the Defrost Guide on the following page.
NOTE: DEFROST can be programmed with More or
Less Time Adjustment. See page 3-5.
NOTE: To defrost other foods or foods above or below
the weights allowed on the Defrost Guide, see “Manual
Defrost”.

3-4
Theory of Operation Drawer Microwave
MANUAL DEFROST
If the food that you wish to defrost is not listed on the
Defrost Guide or is above or below the limits in the
“Amount” column on the Defrost Guide, you need to
defrost manually.
You can defrost any frozen food, either raw or previously
cooked, by using POWER LEVEL at 30%. Follow the
exact 3-step procedure found under “To Set Power
Level” on page 14.Estimate defrosting time and press
POWER LEVEL pad eight times for 30% power.
For either raw or previously cooked frozen food, the rule
of thumb is approximately 4minutes per pound (.45 kg).
For example, defrost 4 minutes for 1 pound (.45 kg) of
frozen spaghetti sauce.
Always stop the oven periodically to remove or separate
the portions that are defrosted. If food is not defrosted
at the end of the estimated defrosting time, program the
oven in 1minute increments on POWER LEVEL30% until
totally defrosted.
When using plastic containers from the freezer, defrost
only long enough to remove from the plastic in order to
place in a microwave safe dish.
REHEAT
Reheat automatically computes the correct warming
time and microwave power level for foods shown in the
Reheat Guide. (See Use and Care Manual)
Touch1. REHEAT pad once.
See Menu Label. Select desired food by touching2.
number pad. Example: Touch 2 for frozen rolls or
mufns.
Touch the number pad to select quantity. Example:3.
Touch 2 for 2 rolls or mufns.
Touch START/ADD MINUTE pad.4.
NOTES: Reheat can be programmed with More or Less
Time Adjustment. See page 3-5.
MICRO WARM
MICRO WARM allows you to keep food warm up to 30
minutes.
DIRECT USE:
Touch1. MICRO WARM pad. enter time up to
30 minutes
Enter desired time by touching the number pads. To2.
enter 30 minutes, touch 3 0 0 0.
30:00 touch start
Touch3. START/ADD MINUTE pad. The oven will
start. The display will show 30:00 and count down.
keep warm will be displayed intermittently during
the countdown.
MANUAL COOKING
Enter desired cooking time and power level.1.
Touch2. MICRO WARM pad.
Enter desired warming time up to 30 minutes.3.
Touch4. START/ADD MINUTE pad. The operation will
start. When the cooking time is complete, a long tone
will sound and MICRO WARM will start. The display
will count down. keep warm will be displayed
intermittently during the countdown.
NOTE: If you attempt to enter more than 30minutes for
MICRO WARM, an error message will appear in the
display.
NOTE: MICRO WARM cannot be programmed with
SENSOR POPCORN, SENSOR REHEAT, SENSOR
COOK, DEFROST or REHEAT.
MULTIPLE SEQUENCE COOKING
Your drawer microwave can be programmed for up to 4
automatic cooking sequences, switching from one power
level setting to another automatically.
Sometimes cooking directions tell you to start on one
power level and then change to a different power level.
Your drawer microwave can do this automatically.
First enter cooking time. Then touch1. POWER LEVEL
pad once for 100% cooking or repeat touching
POWER LEVEL pad for a lower power level.
Enter second cooking time. Repeat touching2.
POWER LEVEL pad for desired level. You can follow
this procedure up to 4 times. touch start
Touch3. START/ADD MINUTE pad.
NOTE: If POWER LEVEL pad is touched once, high
will be displayed.
NOTE: If 100% is selected as the nal sequence, it is not
necessary to touch the POWER LEVEL pad.
NOTE: If you wish to know power level during cooking,
simply touch the POWER LEVEL pad. As long as your
nger is touching the POWER LEVEL pad, the power
level will be displayed.
NOTE: MICRO WARM can be programmed even if 4
cooking sequences have been set.
HELP FEATURE
Each setting of SENSOR REHEAT, SENSOR COOK,
SENSOR POPCORN, MICRO WARM, REHEAT and
DEFROST has a cooking hint. If you wish to check,
touch HELP whenever HELP is lighted in the Interactive
Display for these and other manual operation hints.

3-5
Theory of Operation
Drawer Microwave
ADD MINUTE
ADD MINUTE allows you to cook for a minute at 100%
by simply touching the ADD MINUTE pad. You can
also extend cooking time in multiples of 1 minute by
repeatedly touching the ADD MINUTE pad during
manual cooking.
NOTES: To use ADD MINUTE, touch the ADD MINUTE
pad within 3 minutes after cooking, closing the door or
touching the STOP/CLEAR pad.
NOTES: ADD MINUTE cannot be used with SENSOR
settings, REHEAT or DEFROST.
MORE OR LESS TIME ADJUSTMENT
Should you discover that you like any of the SENSOR,
REHEAT or DEFROST settings slightly more done,
touch the POWER LEVEL pad once after touching your
selection. The display will show More .
For slightly less done, touch the POWER LEVEL pad
twice after touching your selection. The display will show
less .
CONTROL LOCK
The CONTROL LOCK prevents unwanted drawer
operation such as by small children. The drawer
microwave can be set so that the control panel is
deactivated or locked.
TO LOCK
Touch CONTROL LOCK pad and hold for 3 seconds.
The display shows lock on .
TO UNLOCK
Touch CONTROL LOCK pad and hold for 3 seconds.
The display shows lock off .
SETUP / HELP
If the electrical power supply to your drawer microwave
should be interrupted, the display will intermittently show
enjoy your micro- wave touch clear and touch clock
after the power is reinstated. If this occurs, the SETUP/
HELP option you input will be erased. Simply touch
STOP/CLEAR pad and reset.
AUDIBLE SIGNAL ELIMINATION
At the end of timed cook, beeps will sound. If you wish to
have the appliance with no audible signals, you can turn
the audible signals off.
To turn sound off:
Touch1. SETUP/HELP pad.
Display shows - touch again
Touch2. SETUP/HELP pad again.
Display shows - sound off? touch start
Touch3. START/ADD MINUTE pad.
The display shows - sound off
To restore sound:
Touch1. SETUP/HELP pad.
Display shows - touch again
Touch2. SETUP/HELP pad again.
Display shows - sound on? touch start
Touch START/ADD MINUTE pad.3.
The display shows - sound on
AUTO START
If you wish to program the drawer microwave to begin
cooking automatically at a designated time of day, follow
this procedure.
Touch1. SETUP/HELP pad 4 times.
Display shows. auto start touch start
Touch2. START/ADD MINUTE pad.
Display shows. enter start time
Enter start time.3. 4:30 touch clock
Touch4. TIMER/CLOCK pad.
Display shows. enter cooking time
Touch the number pads to enter cooking time.5.
Display shows. 20.00 touch start or touch power
level
Touch POWER LEVEL pad repeatedly until the
desired power level is reached. touch start
Touch6. START/ADD MINUTE pad.
DEMONSTRATION MODE
To select Demo Mode:
Touch1. SETUP/HELP pad ve times.
Display shows. demo on? hold start 3 sec
Hold2. START/ADD MINUTE pad for 3 seconds.
Display shows demo on
To cancel Demo Mode:
Hold1. SETUP/HELP pad ve times.
Display shows demo off? hold start 3 sec
Touch2. START/ADD MINUTE pad.
Display shows demo off
NOTE: Drawer microwave doesn’t heat in Demo Mode.
NOTE: Display counts down quickly.

3-6
Theory of Operation Drawer Microwave
TECHNICAL OPERATION
NOTE:The following is a description of component
functions during oven operation.
OFF CONDITION:
Closing the drawer activates the door sensing switch and
secondary interlock switch. (In this condition, the monitor
switch contacts are opened.) When oven is plugged in,
3-620 vac is supplied to the control unit. (See Figure 3-1)
The display will show ashing “Enjoy Your Drawer•
Touch Clear and Touch Clock”.
To set any program or set the clock, you must rst•
touch the STOP/CLEAR pad. The display will clear,
and “ : “ will appear.
COOKING CONDITION:
Program desired cooking time by touching the NUMBER
pads. Program the power level by touching the POWER
LEVEL pad and then a Number pad.
When the START pad is touched, the following
operations occur:
The contacts of relays are closed and components1.
connected to the relays are turned on as follows.
(See Figure 3-1)
RELAY CONNECTED COMPONENTS
RY-1 oven lamp/stir fan motor/fan motor
RY-2 power transformer
20 vac is supplied to the primary winding of the2.
power transformer and is converted to about 3.3 vac
output on the lament winding, and approximately
2370 vac on the high voltage winding.
The lament winding voltage heats the magnetron3.
lament and the H.V. winding voltage is sent to a
voltage doubler circuit.
The microwave energy produced by the magnetron4.
is channelled through the waveguide into the cavity
feed-box, and then into the cavity where the food is
placed to be cooked.
Upon completion of the cooking time, the power5.
transformer, oven lamp, etc. are turned off, and the
generation of microwave energy is stopped. The
oven will revert to the OFF condition.
When the drawer is opened during a cook cycle,6.
the monitor switch, door sensing switch, secondary
interlock switch, relay (RY3-6) and primary interlock
relay are activated with the following results. The
circuits to the stir fan motor, the cooling fan motor,
and the high voltage components are de-energized,
the oven lamp remains on, and the digital read-out
displays the time still remaining in the cook cycle
when the door was opened.
The monitor switch electrically monitors the operation7.
of the secondary interlock switch and secondary
interlock relay and is mechanically associated with
the drawer so that it will function in the following
sequence.
When the drawer opens from the closed position, the8.
primary interlock relay (RY2) and secondary interlock
switch open their contacts. And contacts of the relay
(RY3-6) remains closed. Then the monitor switch
contacts close.
When the drawer is closed from the open position,9.
the monitor switch contacts open rst. Then the
contacts of the secondary interlock switch and door
sensing switch close. And contacts of the relay
(RY3-6) open.
If the secondary interlock switch and primary interlock
relay (RY2) fail with the contacts closed when the drawer
is opened, the closing of the monitor switch contacts will
form a short circuit through the fuse, secondary interlock
switch, relay (RY3-6) and secondary interlock relay
(RY2), causing the fuse to blow.
POWER LEVEL P-0 TO P-90 COOKING:
VARI-MODE ON TIME OFF TIME
Power 10(P-HI)
(100% power) 32 sec. 0 sec.
Power 10(P-90)
(approx 90% power) 30 sec. 2 sec.
Power 10(P-80)
(approx 80% power) 26 sec. 6 sec.
Power 10(P-70)
(approx 70% power) 24 sec. 8 sec.
Power 10(P-60)
(approx 60% power) 22 sec. 10 sec.
Power 10(P-50)
(approx 50% power) 18 sec. 14 sec.
Power 10(P-40)
(approx 40% power) 16 sec. 16 sec.
Power 10(P-30)
(approx 30% power) 12 sec. 20 sec.
Power 10(P-20)
(approx 20% power) 8 sec. 24 sec.
Power 10(P-10)
(approx 10% power) 6 sec. 26 sec.
Power 10(P-0)
(0% power) 0 sec. 32 sec.
NOTE:The ON/OFF time ratio does not correspond with
the percentage of microwave power, because approx.
2 seconds are needed for heating of the magnetron
lament.

3-7
Theory of Operation
Drawer Microwave
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Figure 3-1

3-8
Theory of Operation Drawer Microwave
SENSOR COOKING CONDITION
Using the SENSOR function, food is cooked without
guring time, power level or quantity. When the oven
senses enough steam from the food, it relays the
information to its microprocessor which will calculate
the remaining cooking time and power level needed
for best results. When the food is cooked, water
vapor is developed, the sensor “senses” the vapor
and its resistance increase gradually. When the
resistance reaches the value set according to the menu,
supplementary cooking is started.
The time of supplementary cooking is determined by
experiment with each food category and inputted into the
LSI. An example of how sensor works: (Potatoes)
COOKING SEQUENCE
Touch one of the SENSOR pads.1.
NOTE: The oven should not be operated on sensor
immediately after plugging in the unit. Wait two minutes
before cooking on SENSOR.
The coil of shut-off relay (RY-3-8) is energized, but2.
the power transformer is not turned on.
After about 3-86 seconds, the cook relay (RY-2)3.
is energized. The power transformer is turned
on, microwave energy is produced and rst stage
is started. The 3-86 seconds is the cooling time
required to remove any vapor from the oven cavity
and sensor.
NOTE: During this rst stage, do not open the drawer or
touch STOP/CLEAR pad.
4. When the sensor detects the vapor emitted from4.
the food, the display switches over to the remaining
cooking time and the timer counts down to zero. At
this time, the drawer may be opened to stir, turn or
season food.
When the timer reaches zero, an audible signal5.
sounds. The shut-off relay and cook relay are de-
energized and the power transformer, oven lamp,
etc. are turned off.
6. Opening the drawer or touching the STOP/CLEAR6.
pad, the time of the day will reappear on the display
and the oven will revert to an OFF condition. When
the timer reaches zero, an audible signal sounds.
MICROWAVE
MICROWAVE
AH SENSOR
Potatoes at room temperature. Vapor is emitted very1.
slowly.
Heat Potatoes. Moisture and humidity is emitted very2.
rapidly. You can smell the aroma as it cooks.
Sensor detects moisture and humidity and calculates3.
cooking time and variable power.