Maytag AMV6177AAB Service manual

Service
This manual is to be used by qualified appliance
technicians only. Maytag does not assume any
responsibility for property damage or personal
injury for improper service procedures done by
an unqualified person.
2004
Over the Range
Domestic
Convection
Microwaves
This Base Manual covers general information
Refer to individual Technical Sheet
for information on specific models
This manual includes, but is
not limited to the following:
AMV6177AAB/W/Q/S
MMV6178AAB/W/Q/S
16023057
Revision 0
May 2004
Important Information
Pride and workmanship go into every product to provide our customers with quality products. It is possible, however,
that during its lifetime a product may require service. Products should be serviced only by a qualified service
technician who is familiar with the safety procedures required in the repair and who is equipped with the proper tools,
parts, testing instruments and the appropriate service manual. REVIEW ALL SERVICE INFORMATION IN THE
APPROPRIATE SERVICE MANUAL BEFORE BEGINNING REPAIRS.
Important Notices for Consumers and Servicers
!
WARNING
To avoid risk of serious injury or death, repairs should not be attempted by an unauthorized service personnel,
dangerous conditions (such as exposure to electrical shock) may result.
!
CAUTION
Maytag will not be responsible for any injury or property damage from improper service procedures. If performing
service on your own product, assume responsibility for any personal injury or property damage which may result.
To locate an authorized servicer, please consult your telephone book or the dealer from whom you purchased this
product. For further assistance, please contact:
Customer Service Support Center
CAIR Center
Web Site
Telephone Number
WWW.AMANA.COM ................................................ 1-800-843-0304
WWW.MAYTAG.COM ............................................. 1-800-688-9900
CAIR Center in Canada ........................................... 1-800-688-2002
Amana Canada Product ........................................... 1-866-587-2002
Recognize Safety Symbols, Words, and Labels
! DANGER
DANGER—Immediate hazards which WILL result in severe personal injury or death.
!
WARNING
WARNING—Hazards or unsafe practices which COULD result in severe personal injury or death.
!
CAUTION
CAUTION—Hazards or unsafe practices which COULD result in minor personal injury or product or property
damage.
2
16023057 Rev. 0
©2004 Maytag Services
Table of Contents
Important Information .................................................... 2
Important Safety Information ......................................... 4
Microwave Leakage Testing .......................................... 5
General Information
Specifications ............................................................ 7
Placement of the Oven ............................................... 7
Location of Model Number ......................................... 7
Model Identification .................................................... 7
Service ....................................................................... 7
Parts and Accessories ............................................... 7
Asure™ Extended Service Plan ................................. 7
Radio Interference ...................................................... 7
Electrical Requirements ............................................. 8
Cleaning ..................................................................... 8
Grounding Instructions ............................................... 8
Microwave Oven Description ...................................... 9
Troubleshooting Procedures
General ..................................................................... 10
Error Codes .............................................................. 16
Testing Procedures ................................................. 17-21
©2004 Maytag Services
Disassembly Procedures
Grille ......................................................................... 22
Door Assembly ......................................................... 22
Door Disassembly .................................................... 22
Control Panel ............................................................ 23
P.C. Board ................................................................ 23
Control Key Panel ..................................................... 24
Outer Case ............................................................... 24
Stirrer Assembly ....................................................... 24
Interlock Door Latch Switches .................................. 25
High Voltage Capacitor ............................................. 26
Diode ........................................................................ 26
Transformer .............................................................. 26
Fuse ......................................................................... 26
Magnetron ................................................................ 26
Magnetron Fan Assembly ......................................... 27
Magnetron Thermal Fuse .......................................... 27
Humidity Sensor ....................................................... 27
Oven Thermostat ...................................................... 27
Turntable Motor ......................................................... 28
Vent Blower .............................................................. 28
Convection Motor ...................................................... 28
Convection Heater ..................................................... 29
Light Socket ............................................................. 29
Grill Heater ............................................................... 29
Appendix A
Installation Instructions ........................................... A-2
Appendix B
Use and Care information ........................................ B-2
16023057 Rev. 0
3
3
Important Safety Information
!
CAUTION
Read the following information to avoid possible exposure to microwave radiation:
The basic design of the Maytag and Amana microwave
oven makes it an inherently safe device to both use and
service. However, there are some precautions which
should be followed when servicing the microwave oven to
maintain this safety. These are as follows:
1. Always operate the unit from an adequately grounded
outlet. Do not operate on a two-wire extension cord.
2. Before servicing the unit (if unit is operable), perform
the microwave leakage test.
3. The oven should never be operated if the door does
not fit properly against the seal, the hinges or hinge
bearings are damaged or broken; the choke is
damaged, (pieces missing, etc.); or any other visible
damage can be noted. Check the choke area to
ensure that this area is clean and free of all foreign
matter.
4. If the oven operates with the door open and
produces microwave energy, take the following
steps.
A. Tell the user not to operate the oven.
B. Contact Maytag immediately.
5. Always have the oven disconnected when the outer
case is removed except when making the "live" tests
called for in the Service Manual. Do not reach into the
equipment area while the unit is energized. Make all
connections for the test and check them for tightness
before plugging the cord into the outlet.
6. Always ground the capacitors on the magnetron filter
box and H. V. Capacitor with an insulated-handle
screwdriver before working in the high voltage area
of the equipment compartment. Some types of
failures will leave a charge in these capacitors and
the discharge could cause a reflex action which
could make you injure yourself.
4
7. In the area of the transformer, capacitor, diode, and
magnetron there is HIGH VOLTAGE. When the unit is
operating, keep this area clean and free of anything
which could possibly cause an arc or ground, etc.
8. Do not for any reason defeat the interlock switches.
There is no valid reason for this action at any time;
nor will it be condoned by Maytag.
9. IMPORTANT: Before returning a microwave to a
customer, check for proper switch interlock action.
The primary and secondary switches MUST open
when the door is actuated. The monitor switch MUST
close at a 1/4 inch when the door is opened.
10.Before returning a microwave to a customer, verify
the door spacing is reasonably uniform along the
top, bottom, and sides, and that it measures 1/8 inch
or less.
11. The microwave oven should never be operated with:
• Any components removed and/or bypassed.
• Any of the safety interlocks failing.
• Any of the seal surfaces failing, missing, or
damaged.
12.To ensure that the unit does not emit excessive
microwave leakage and to meet the Department of
Health Human Service guidelines, check the oven
for microwave leakage using Narda Model 8100,
8200, Holaday HI1500, HI1501 or Simpson 380M
leakage monitor as outlined in the instructions. The
maximum leakage level allowed is 4mW/cm2.
13. If servicer encounters an emission reading over
4 mW/cm2 the servicer must cease repair and
contact the Maytag Service Department immediately
for further direction. Maytag will contact the proper
Government Agency upon verification of the test
results.
16023057 Rev. 0
©2004 Maytag Services
Microwave Leakage Testing
!
Measurement With the Outer Panel
Removed
W ARNING
Check for radiation leakage after servicing. Should the
leakage be more than 4mW/cm2 inform Maytag
immediately. After repairing or replacing any radiation
safety device, keep a written record for future
reference, as required by D.H.H.S. and HEW
regulations. This requirement must be strictly
observed. In addition, the leakage reading must be
recorded on the service repair ticket while in the
customer’s home.
Avoid contacting any high voltage components.
Whenever you replace the magnetron, measure for
radiation leakage before the outer panel is installed and
after all necessary components are replaced or
adjusted. Special care should be taken in measuring
around the magnetron.
Equipment
Measurement With a Fully Assembled Oven
• Electromagnetic radiation monitor
• 600 cc glass beaker
After all components including the outer panel are fully
assembled, measure for radiation leakage around the
door periphery, the door viewing window, the exhaust
opening, and air inlet openings.
Procedure For Measuring Radiation
Leakage
Note before measuring • Do not exceed meter full scale deflection. Leak
monitor should initially be set to the highest scale.
• To prevent false readings the test probe should be
held by the grip portion of the handle only.
• The scan speed is equal to one inch per antenna
revolution or one inch per second if antenna speed is
unknown.
• Areas to be checked are all door seal areas and any
venting parts.
• Leakage with the outer panel removed...4mW/cm2 or
less.
• Leakage for fully assembled oven with door normally
closed ...4mW/cm2 or less.
• Leakage for a fully assembled oven (before the latch
switch (primary) is interrupted) while pulling the door ...
4mW/cm2 or less.
1 . Pour 275 ±15 cc (9 oz ±1/2 oz) of 20 ± 5°C
(68 ± 9°F) water in a beaker which is graduated to
600 cc and place the beaker in the center of oven.
2. Set the radiation monitor to 2450 MHz and use it
following the manufacturer’s recommended test
procedure to assure correct results.
3. While measuring the leakage, always use the two
inch (5 cm) spacer supplied with the probe.
4. Press the start pad or turn on the timer and with the
magnetron oscillating, measure the leakage by
holding the probe perpendicular to the surface being
measured.
©2004 Maytag Services
Record Keeping and Notification After
Measurement
1. After any adjustment or repair to a microwave oven,
a leakage reading must be taken. Record this
leakage reading on the repair ticket even if it is zero.
2. A copy of the repair ticket and the microwave
leakage reading should be kept by the repair facility.
16023057 Rev. 0
5
General Information
This manual provides basic instructions and suggestions
for handling, installing , and servicing microwave ovens.
The directions, information, and warnings in this manual
are developed from experience with, and careful testing of
the product. If the unit is installed according to the
Installation Instructions, it will operate properly and will
require minimal servicing. A unit in proper operating order
ensures the consumer all the benefits provided by efficient
microwave cooking.
This manual contains information needed by authorized
service technicians to install and service the microwave
pertaining to this manual. There maybe, however some
information which needs further explanation. Refer to
individual Installation Instructions, Use and Care,
Technical Sheets, or toll free technical support line to
answer questions from authorized service technicians.
Cooking Nomenclature
A
M
C
5
5
1
5
A
A
W
Color
A
B
C
H
L
P
Q
S
T
W
F
N
Brand
A
C
G
H
J
M
N
U
Y
Amana
Magic Chief
Graffer &
Sattler
Hardwick
Jenn-Air
Maytag
Norge
Universal
Crosley
Listing
Fuel
B
D
E/J
G
L
M
P
X
W
Almond on Almond
Black
Brushed Chrome
Traditional White
Traditional Almond
Prostyle
Monochromatic Bisque
Stainless
Traditional Bisque
White on White
Frost White (True Color White)
Natural Bisque (True Color Bisque)
A
C
D
G
M
P
Butane
Dual Fuel
Electric
Gas, Natural
Liquid Propane
Microwave
Standing Pilot
No Fuel
Warming Drawer
X
UL/AGA
CSA/CGA/CUL
Dual Listed
220-240 V / 50-60 Hz
Military Model
PSB Approved
(Singapore)
Export 120 V / 60 Hz
Production Code
This identifies which
version of production the
unit is.
Product Type
A
C
D
E
G
L
M
P
Q
R
S
T
V
W
Y
Z
6
Accessory/Cartridge
Cooktop Updraft/Countertop
Downdraft Cooktop or Warming Drawer
Eyelevel Range
Grill
Range (20")
Range (36")
Drop In (24")
Wall Oven (27")
Range, Free-Standing (30")
Slide-In (30")
Range Hood
OTR
Wall Oven
RV Range
RV Top
Feature Content
1000-3999
4000-6999
7000-9999
16023057 Rev. 0
Brands
Maytag/Amana
©2004 Maytag Services
General Information
Specifications
Refer to individual Technical Sheet for specification
information.
Placement of the Oven
This microwave can be easily placed in the kitchen, family
room, or anywhere else in the house. Place the oven on a
flat surface such as a kitchen countertop or a specially
designed microwave oven cart. Do not place oven above a
gas or electric range. Free air flow around the oven is
important.
Do Not Block Air Vents
All air vents must be kept clear during cooking. If air vents
are covered during operation the oven may overheat. In
this case, a sensitive thermal safety device automatically
turns the oven off. The oven will be inoperable until the
oven has cooled sufficiently.
Location of Model Number
To request service information or replacement parts, the
service center will require the complete model, serial, and
manufacturing number of your microwave oven. The
number is located inside the oven door cavity as shown in
the illustration below.
Service
Keep a copy of sales receipt for future reference or in
case warranty service is required. To locate an authorized
servicer:
• For Amana product call 1-800-628-5782 or visit the
Web Site at www.amana.com
• For Maytag product call 1-800-462-9824 or visit the
Web Site at www.maytag.com
• For product in Canada call 1-866-587-2002 or visit the
Web Sites at www.amana.com or www.maytag.com
Warranty service must be performed by an authorized
servicer. We also recommend contacting an authorized
servicer, if service is required after warranty expires.
Parts and Accessories
Purchase replacement parts and accessories over the
phone. To order accessories for your product call:
• For Amana product call 1-877-232-6771 or visit the
Web Site at www.amana.com
• For Maytag product call 1-800-462-9824 or visit the
Web Site at www.maytag.com
• For product in Canada call 1-866-587-2002 or visit the
Web Sites at www.amana.com or www.maytag.com
Extended Service Plan
Model and Serial Number plate
We offer long-term service protection for this new oven.
• Asure™ Extended Service Plan is specially designed
to supplement Amana’s strong warranty. This plan
covers parts, labor, and travel charges.
Call 1-866-232-6244 for information.
• Dependability Plus™ Extended Service Plan is
specially designed to supplement Maytag’s strong
warranty. This plan covers parts, labor, and travel
charges.
Call 1-800-925-2020 for information.
Model Identification
Complete enclosed registration card and promptly return.
If registration card is missing:
• For Amana product call 1-800-843-0304 or visit the
Web Site at www.amana.com
• For Maytag product call 1-800-688-9900 or visit the
Web Site at www.maytag.com
• For product in Canada call 1-866-587-2002 or visit the
Web Sites at www.amana.com or www.maytag.com
When contacting provide product information located on
rating plate.
Record the following:
Model Number:
___________________
Manufacturing Number:
___________________
Serial or S/N Number:
___________________
Date of purchase:
___________________
Dealer’s name and address:
___________________
©2004 Maytag Services
Radio Interference
1. Microwave oven operation may interfere with the radio
or TV reception.
2. When there is interference, it may be reduced or
eliminated by taking the following measures:
• Clean the door and the seal surface of the oven.
• Reorient the receiving antenna of the radio or TV.
• Relocate the microwave oven in relation to the radio
or TV.
• Move the microwave away from the receiver.
• Plug the microwave into a different outlet so that the
microwave and receiver are on different branch
circuits.
3. 120 VAC, 60 Hz household outlet. Be sure the circuit
is at least 15 or 20 A and the microwave oven is the
only appliance on the circuit. It is not designed for 50
Hz or any circuit other than a 120 VAC, 60 Hz circuit.
• Electrical Rating of the Oven: 120 VAC, 60 Hz
16023057 Rev. 0
7
General Information
Electrical Requirements
Grounding Instructions
The oven is designed to operate on a Standard 120 VAC,
60 HZ household outlet.
This appliance must be grounded. If an electrical short
circuit occurs, grounding reduces the risk of electric
shock by providing an escape wire for the electric current.
The cord for this appliance has a grounding wire with a
grounding plug. Put the plug into an outlet that is properly
installed and grounded.
Cleaning
Before cleaning the oven, unplug the power supply cord. If
impossible, open the oven door to prevent an accidental
oven start.
Inside of the Oven
Use a damp cloth to wipe out crumbs and spillovers. It is
important to keep the area between door and cavity front
clean to assure a tight seal. Remove greasy spatters with
a sudsy cloth, then rinse and dry. Do not use harsh
detergent or abrasive cleaners.
Glass Tray
The glass tray can be washed by hand or in the
dishwasher.
!
To avoid risk of electric shock, personal injury or death,
use grounding plug properly.
Ask a qualified electrician if you do not understand the
grounding instructions or if you wonder whether the
appliance is properly grounded.
Keep the electrical power cord dry and do not pinch or
crush it in any way.
Control Panel
Wipe with a damp cloth followed immediately by a dry
cloth. The Child Lock feature is also useful when cleaning
the control panel. Child Lock prevents accidental
programming when wiping the control panel
(if so equipped).
Properly Polarized and
Grounded Outlet
Door
If steam accumulates inside or around the outside of the
oven door, wipe the panel with a soft cloth. This may
occur when the microwave oven is operated under high
humidity conditions and in no way indicates a malfunction
of the unit.
Outside Oven Surface
Clean with damp cloth. To prevent damage to the
operating parts inside the oven, the water should not be
allowed to seep into the ventilation openings.
After cleaning the oven, be sure that the rotating ring and
the glass tray are in the right position. Press the STOP/
CLEAR pad twice to reset any accidental key setting.
8
W ARNING
Three-Pronged (Grounding) Plug
For a permanently connected appliance: This appliance
must be connected to a grounded, metallic, permanent
wiring system, or an equipment grounding conductor
should be run with the circuit conductors and connected
to the equipment grounding terminal or lead on the
appliance.
16023057 Rev. 0
©2004 Maytag Services
General Information
Microwave Oven Description
©2004 Maytag Services
16023057 Rev. 0
9
Troubleshooting Procedures
!
WARNING
To avoid risk of electrical shock, personal injury, or death, disconnect power to oven before servicing, unless
testing requires it.
! CAUTION
•
•
•
•
•
Verify proper grounding before checking for trouble.
Be careful of the high voltage circuit.
Discharge the high voltage capacitor.
When checking the continuity of the switches or of the high voltage transformer, disconnect one lead wire from
these parts and then check continuity with the AC plug removed. To do otherwise may result in a false reading
or damage to your meter.
Do not touch any part of the circuit on the printed circuit board, since static electric discharge may damage the
control panel. Always touch yourself to ground while working on this panel to discharge any static charge built
up in your body.
"PLEASE TOUCH TIME OF DAY"
does not appear in
the display,
when unit is plugged in.
1. Check power supply.
2. Check fuse.
3. Check oven thermostat.
Measure voltage
between pin 1
and pin 3 of
CN1 connector
Is 120 volts
indicated?
Replace
circuit
board.
NO
Unit operates.
10
16023057 Rev. 0
©2004 Maytag Services
Troubleshooting Procedures
Measure resistance
of control key
panel after removing
ribbon connector.
Key pad matrix is located in
“Testing Procedures” located on
Pages 20 & 21.
Is continuity
indicated when
key pad is
pressed?
NO
NO
Replace
control
key pad.
Does ribbon
connector have
proper
connection?
Reconnect
ribbon connector
for proper
connection.
Replace
circuit
board.
Unit operates.
Check Touch Keypad
Measure resistance of
CN2 between pin 1 and
pin 3 with door closed.
NO
NO
Adjust or
replace door
sensing
switch.
Reconnect
ribbon connector
for proper
connection.
Does ribbon
connector have
proper
connection?
Replace
circuit
board.
Unit operates.
©2004 Maytag Services
16023057 Rev. 0
11
Troubleshooting Procedures
Check Air Vents
Unit operates normal,
but little or no heating
is produced with an
oven load.
Check if fan motor
operates when
START is pressed.
Does fan motor
operate when
START is
pressed?
NO
NO
Place a jumper
wire across
thermostat.
Replace high
voltage
capacitor.
Does capacitor have
correct resistance?
See Testing
Procedures.
Replace
magnetron.
Replace
thermostat.
NO
Unit operates.
Measure
resistance
of fan motor.
Replace
circuit
board.
Is resistance
present?
NO
Replace
fan motor.
12
16023057 Rev. 0
©2004 Maytag Appliances Company
Troubleshooting Procedures
Check Primary/Secondary Interlock Switches and Thermostat
Unit does not heat even
if display counts down
when START pad is
pressed for high power.
Check the
contacts of
relays 8, 10, 11. See
Testing Procedures.
NO
Replace
circuit
board.
Does ribbon
connector have
proper
connection?
NO
Reconnect ribbon
connector for
proper
connection.
Replace
circuit
board.
Unit operates.
Unit does not heat even
if display counts down
when START pad is
pressed for high power.
Does transformer
have the correct
resistance?
Measure resistance of
high voltage transformer.
See Testing
Procedures.
Measure
resistance of high
voltage capacitor.
See Testing
Procedures.
NO
Replace
high voltage
transformer.
Unit operates.
Does capacitor
have correct
resistance?
NO
Measure
resistance of high
voltage diode.
See Testing
Procedures.
Replace
high voltage
transformer.
Replace
high
voltage
diode.
NO
Does diode
have correct
resistance?
Replace
magnetron.
©2004 Maytag Services
16023057 Rev. 0
13
Troubleshooting Procedures
Check Power Supply and Fuse
Ventilation fan does
not operate when
FAN HIGH/LOW pad
is pressed.
Does magnetron
thermal fuse and
oven thermostat have
the correct
resistance?
Measure resistance
of magnetron
thermal fuse and
oven thermostat.
Verify proper
connection of
ribbon
connector.
Does ribbon
connector have
proper
connection?
NO
NO
Replace
circuit
board.
Reconnect ribbon
connector for
proper connection.
Replace
ventilation
fan.
NO
Unit operates.
No buzzer sound when
pressing control pad
between stages or at
the end of cooking.
Verify normal
operation of
circuit board.
Replace
circuit
board.
Unit operates.
14
16023057 Rev. 0
©2004 Maytag Appliances Company
Troubleshooting Procedures
Relay
FAN motor and oven lamp turn on without touching
START key when the door is closed.
YES
NO
Remove the male connector of I/O
CON from the circuit board.
Does the unit still operate?
GOOD
NO
Replace
circuit board
YES
Defective
RELAY1
Replace
circuit board
FAN motor and oven lamp turn on when the door is
closed and START key is touched.
NO
YES
GOOD
Measure the voltage at pin 35
of U01
Voltage reading: 0 Vdc
10 of U03
Voltage reading: about 15V?
NO
Replace the
circuit board
YES
Defective
RELAY1 or poor
connection of
RELAY1
Replace
circuit board
or correct
the connection.
©2004 Maytag Services
16023057 Rev. 0
15
Troubleshooting Procedures
Oven Error Code Display
Touchpad Display
F1
F2
F3
F4
F5
Error Mode
Thermistor Open
Thermistor Short Before Cooking
Thermistor Short After Cooking
Sensor Open
Damper Switch Sensing Error
Checkout Procedure: Fuse
PROBLEM
Fuse blows immediately after door is closed.
Fuse blows immediately after door is opened.
Fuse blows when door is closed and START
key is touched.
CAUSE
Improper operation of the primary interlock, secondary interlock
switches and/or interlock monitor switch.
Malfunction of high voltage transformer; high voltage capacitor
including diode, magnetron, blower motor or circuit board.
NOTES: Replace blown fuse with 20 Amp fuse.
If the fuse is blown due to an improper switch operation, replace all interlock switches, PCB Ass’y and the
fuse simultaneously, and ensure they are connected properly.
Check for microwave energy leakage after replacing interlock and monitor switches.
Latch Board
Primary Interlock Switch
Black (Cn1)
Red (Oven TCO)
Red (H.V.Transformer)
White (from Convection Heater)
Monitor Interlock Switch
White
Red/Black
Secondary Interlock Switch
Pink (from P.C.B)
Green
Checkout Procedure: Circuit Board
PROBLEM
The START function fails to operate, but the high voltage
systems, interlock/monitor switches and door sensing/relays
all test good.
Proper temperature is not obtained.
Buzzer does not sound or sounds continuously.
Some segments of 1 or more digits display on the touch
panel, or display when they should not.
NOTE:
16
CAUSE
Defective Control Printed Circuit Board Assembly
Check for microwave energy leakage after replacing Printed Circuit Board Assembly.
16023057 Rev. 0
©2004 Maytag Appliances Company
Testing Procedures
!
WARNING
To avoid risk of electrical shock, personal injury or death; disconnect power to oven and discharge the high voltage
capacitor before servicing, unless testing requires power.
Illustration
Component
High voltage
transformer
120 V
Secondary
Primary
Filament
0V
Magnetron
Test Procedure
Discharge Capacitor
Disconnect connector and measure
continuity with meter on R x 1 scale:
Secondary.....................................
Filament ........................................
Primary .........................................
(Measure at room temperature, or 70° F)
Measure continuity with meter on “High”
scale: Primary winding to ground.............
Filament winding to ground ...........
Discharge Capacitor
Remove wires from magnetron and
connect ohmmeter to terminals. Also
check between each terminal and ground.
High Voltage
Capacitor
High Voltage Diode
Discharge Capacitor
Remove wires from capacitor terminals
and connect ohmmeter, set on highest
resistance scale to terminals.
Also check between each terminal and
capacitor case.
Discharge Capacitor
Remove diode lead from capacitor and
connect ohmmeter.
Relay 8
Relay 10, 11
©2004 Maytag Services
Reverse leads for second test.
Disconnect the leads. Place water in the
oven and select power levels 1 through
10. Check continuity between the
terminals of the relays.
Disconnect the leads. Place water in the
oven and select Convection Cooking.
Check continuity between the terminals of
the relays.
16023057 Rev. 0
Results
Approximately 65-120 Ω
Less than 1 Ω
Less than 1 Ω
Infinite Ω
Infinite Ω
Between Terminals: Less than 1 Ω
Each terminal to ground: Infinite
resistance.
Note: This test is not conclusive. If
oven does not heat and all other
components test good replace the
magnetron and retest.
Between Terminals: Meter should
momentarily indicate several ohms,
then return to infinity. If no deflection
occurs, or if continuous deflection
occurs, replace capacitor.
Terminal to Case: Infinite resistance
Infinite resistance should be measured
in one direction and continuity in the
opposite direction.
NOTE: Ohmmeter must contain a
battery of 6 volts minimum.
Power Level Cycle On Cycle Off
1
4 sec
18 sec
2
6 sec
16 sec
3
8 sec
14 sec
4
10 sec
12 sec
5
12 sec
10 sec
6
14 sec
8 sec
7
16 sec
6 sec
8
18 sec
4 sec
9
20 sec
2 sec
10
22 sec
0 sec
Convection
Convection
Cooking Start
Cooking Stop
Continuity
Open
17
Testing Procedures
!
WARNING
To avoid risk of electrical shock, personal injury or death; disconnect power to oven and discharge the high voltage
capacitor before servicing, unless testing requires power.
Illustration
Component
Primary Interlock
Switch Test
(Top Switch)
Test Procedure
Measure resistance between
terminals 1 and 2:
Door Open...............................................
Door Closed ............................................
Open
Continuity
Secondary Interlock
Switch Test
(Bottom Switch)
Measure resistance between
terminals 1 and 2:
Door Open...............................................
Door Closed ............................................
Open
Continuity
Interlock Monitor
Switch Test
(Middle Switch)
Measure resistance between
terminals 1 and 2:
Door Open...............................................
Door Closed ............................................
Continuity
Open
1
Results
2
1
2
Magnetron Thermal
Cut-Out (Thermostat)
Oven Thermal CutOut (Thermostat)
Disconnect all wires from TCO.
Measure resistance across terminals.
Magnetron TCO.......................................
Disconnect all wires from TCO.
Measure resistance across terminals.
Magnetron TCO.......................................
Lamp receptacle
Test continuity of receptacle terminals.
Fan motor
Remove all wires from motor.
Measure resistance across coil .................
Open at 302°F (150°C) and closed at
32°F (0°C)
Open at 293°F (145°C) and closed at
32°F (0°C)
Indicates continuity if bulb is good and
installed.
Approximately 35-55 Ω (70°F, 20°C)
Less than 30Ω or more than 60Ω
(70°F, 20°C), motor is defective.
Damper motor
Remove all wires from motor.
Measure resistance across coil .................
Approximately 2-4 Ω (70°F, 20°C)
Less than 1 Ω or more than 5 Ω (70°F,
20°C), motor is defective.
Circulation motor
Remove all wires from motor.
Measure resistance across coil .................
Turntable Drive Motor
(Synchronous motor)
18
Measure across terminals
16023057 Rev. 0
Approximately 25-40 Ω (70°F, 20°C)
Less than 20 Ω or more than 45 Ω
(70°F, 20°C), motor is defective.
Voltage: Approximately 120 VAC
Resistance: Approximately 4 Ω
©2004 Maytag Services
Testing Procedures
!
WARNING
To avoid risk of electrical shock, personal injury or death; disconnect power to oven and discharge the high voltage
capacitor before servicing, unless testing requires power.
Illustration
Component
Ventilation Motor
Test Procedure
Measure across terminals
Convection motor
Remove all wires from motor.
Measure resistance across coil.................
1
2
3
Sensor
Measure resistance across pins 2 & 3 ......
Remove all wires from heater.
Measure resistance across terminals........
Grill heater element
(Model MMV6178AA*)
Thermistor
Refer to Parts Manual
for proper power cord
part number.
©2004 Maytag Services
Power cord
Approximately 29.5 Ω ± 10% (70°F,
20°C)
Remove the 3-pin connector from the
circuit board.
Measure resistance across pins 1 & 2 ......
Convection heater
element
Results
Resistance: Approximately 25-45 Ω
Approximately 3 KΩ (70°F, 20°C ±
35°F, 2°C)
Infinity (70°F, 20°C)
Approximately 15-25 Ω (70°F, 20°C)
Remove all wires from heater.
Measure resistance across terminals........
Remove connector from circuit board.
Approximately 25-30 Ω (70°F, 20°C)
Measure resistance across pins 1 & 3 ......
Approximately 250-360 KΩ (70°F,
20°C ± 35°F, 2°C)
Continuity should be indicated on each
wire.
Verify polarity and grounding.
Measure resistance of wires.
16023057 Rev. 0
19
Testing Procedures
!
WARNING
To avoid risk of electrical shock, personal injury or death; disconnect power to oven and discharge the high voltage
capacitor before servicing, unless testing requires power.
Illustration
Component
Touch Pad/Control
Panel
Model AMV6177AA*
FPC CONNECTOR
Top
1
2
3
4
5
6
7
8
9
10
11
12
13
20
Test Procedure
Removal of Touch
Pad/Control Panel is
required to perform test.
Check for continuity.
When touched: Less than
400 Ω
When not touched: More
than 1 Mega Ω
16023057 Rev. 0
Results
Pad
Trace
1
8&1
2
8&2
3
8&3
4
8&4
5
8&5
6
8&6
7
8&7
8
13 & 5
9
13 & 6
0
13 & 7
Microwave
9&4
Convection
9&5
Combination
9&7
Sensor Popcorn
11 & 1
Sensor Cook
11 & 2
Sensor Reheat
11 & 3
Auto Defrost
11 & 4
Auto Cook
12 & 2
Speed Auto Combination
11 & 6
Custom Program
9&3
Soften
10 & 6
Melt
10 & 7
Control Setup
12 & 1
Power
13 & 1
Clock
12 & 5
More
12 & 6
Less
12 & 7
Add 30 Seconds
11 & 5
Stop/Clear
13 & 3
Enter/Start
13 & 4
Turntable On/Off
12 & 3
Light On/Off
10 & 3
Kitchen Timer
12 & 4
On/Off
10 & 1
5-Speed (Vent)
12 & 2
Auto Time Set
10 & 5
Measurement
Continuity
Continuity
Continuity
Continuity
Continuity
Continuity
Continuity
Continuity
Continuity
Continuity
Continuity
Continuity
Continuity
Continuity
Continuity
Continuity
Continuity
Continuity
Continuity
Continuity
Continuity
Continuity
Continuity
Continuity
Continuity
Continuity
Continuity
Continuity
Continuity
Continuity
Continuity
Continuity
Continuity
Continuity
Continuity
Continuity
©2004 Maytag Services
Testing Procedures
!
WARNING
To avoid risk of electrical shock, personal injury or death; disconnect power to oven and discharge the high voltage
capacitor before servicing, unless testing requires power.
Illustration
Component
Touch Pad/Control
Panel
Model MMV6178AA*
FPC CONNECTOR
Top
1
2
3
4
5
6
7
8
9
10
11
12
13
©2004 Maytag Services
Test Procedure
Removal of Touch
Pad/Control Panel is
required to perform test.
Check for continuity.
When touched: Less than
400 Ω
When not touched: More
than 1 Mega Ω
16023057 Rev. 0
Pad
1
2
3
4
5
6
7
8
9
0
Microwave
Convection
Broil
Combination
Sensor Popcorn
Sensor Cook
Sensor Reheat
Auto Defrost
Auto Cook
Auto Combination
Auto Broil
Custom Program
Soften
Melt
Control Setup
Power
Clock
More
Less
Add 30 Seconds
Stop/Clear
Enter/Start
Turntable On/Off
Light Hi/Lo/Off
Light Timer
Kitchen Timer
On/Off
5-Speed (Vent)
Auto Time Set
Results
Trace
8&1
8&2
8&3
8&4
8&5
8&6
8&7
13 & 5
13 & 6
13 & 7
9&4
9&5
9&6
9&7
11 & 1
11 & 2
11 & 3
11 & 4
12 & 2
11 & 6
11 & 7
9&3
10 & 6
10 & 7
12 & 1
13 & 1
12 & 5
12 & 6
12 & 7
11 & 5
13 & 3
13 & 4
12 & 3
10 & 3
10 & 4
12 & 4
10 & 1
12 & 2
10 & 5
Measurement
Continuity
Continuity
Continuity
Continuity
Continuity
Continuity
Continuity
Continuity
Continuity
Continuity
Continuity
Continuity
Continuity
Continuity
Continuity
Continuity
Continuity
Continuity
Continuity
Continuity
Continuity
Continuity
Continuity
Continuity
Continuity
Continuity
Continuity
Continuity
Continuity
Continuity
Continuity
Continuity
Continuity
Continuity
Continuity
Continuity
Continuity
Continuity
Continuity
21
Disassembly Procedures
!
To avoid the risk of electrical shock, personal injury or
death; disconnect power to oven and discharge
capacitors before following any disassembly procedure.
W AR NIN G
High voltage is present at the high voltage terminal of
the high voltage transformer during any cooking cycle.
It is neither necessary or advisable to attempt
measurement of the high voltage.
3. To place door back on unit, place bottom pin into
hole first and then align the top pin. Once pins are
aligned push door downward to lock into place.
4. Replace front grille to complete assembly.
Before touching any oven components or wiring, always
unplug the oven from its power source and discharge
capacitor.
Grille
The top full-width grille is removable for service to some
components, such as: humidity sensor, oven light, door
removal, flame sensor, vent motor capacitor, fuse,
control panel, and stirrer motor (some models).
Grille Removal
1. Disconnect power to oven.
2. Remove screws located in front on top of microwave
securing grille.
Door Disassembly
1. Disconnect power to oven and remove oven door,
(see "Door Removal" procedure).
2. Pry away choke cover, by placing a tool in the upper
right corner of the door and gently prying outward on
the choke cover. Continue to work around the door
casing until choke cover is completely loose.
!
CAUTION
To avoid property damage, care must be taken when
prying choke cover from oven door.
3. Pull outward on the top portion of the grille releasing
the tabs.
4. Reassemble in reverse order.
Door Assembly
!
CAUTION
A microwave leakage test must be performed anytime
a door assembly is removed, replaced, disassembled
or adjusted for any reason.
Door Removal
1. Disconnect power to oven and remove grille, (see
"Grille" procedure).
2. Open the oven door, slowly raise the door evenly,
disengaging the pins at the top and bottom.
NOTE: When aligning the door for assembly, the door
must be opened as much as possible.
22
3. Slide latch assembly upward and to the left to
release plastic tabs from door frame. Once latch
assembly is loose the spring may be disconnected
from the door frame.
4. Remove screws securing door frame assembly to
door panel.
5. Remove door frame assembly by releasing tabs
around entire door panel.
6. Remove door handle by removing screws securing
handle to door panel.
NOTE: The door handle can only be re-installed by
guiding the top and bottom insertion points into
the correct receiving slots. It is impossible to reinstall the door handle "upside-down."
7. Remove door glass by releasing tab securing door
glass baffle. Remove baffle, then slide door glass to
the right slightly, then push the door glass upward to
release the glass from the track.
8. Reassemble in reverse order.
16023057 Rev. 0
©2004 Maytag Services
Disassembly Procedures
!
To avoid the risk of electrical shock, personal injury or
death; disconnect power to oven and discharge
capacitors before following any disassembly procedure.
W AR NIN G
P.C. Board
The p.c. board is located at the top on back of the
control panel. Some boards has up to eight connection
plugs which control the following:
Baffle
Glass
Choke
Cover
CN1
CN2
CN4
CN5
FPC (S1)
Relay 8, 10, 11
Main power connector
Primary Switch
Humidity Sensor
Damper
Ribbon connector for key panel
Relay connector
Door Frame
Assembly
Spring Latch
Door Panel
!
(CN5)
FPC
Connector
(S1)
CAUTION
A microwave leakage test must be performed anytime
a door assembly is removed, replaced, disassembled,
or adjusted for any reason.
(CN2)
Power
Transformer
(Relay 11)
(Relay 10)
Control Panel
(Relay 8)
The control panel is made up of several components,
such as p.c. board and touch panel.
Control Panel Removal
1. Disconnect oven power and remove grille, (see
"Grille" section).
2. Remove screw located at the top of touch panel. Lift
control panel up and out to release bottom tab
connections.
3. Place control panel on a flat surface.
4. Reassemble in reverse order.
(CN1)
(CN4)
P.C. Board Removal
1. Disconnect oven power and remove grille, (see
"Grille" procedure).
2. Remove control panel, (see "Control Panel"
procedure).
3. Discharge high voltage capacitor, (see "High Voltage
Capacitor" procedure).
4. Disconnect ribbon connector by sliding top part of
connector upward. Once in released position remove
ribbon from connector by siding ribbon side-to-side.
NOTE: Caution should be used when removing cable
from connector. Ribbon cable has two holes
which connector locks ribbon in place.
5. Disconnect and mark the wire connectors from p.c.
board.
6. Remove screws securing p.c. board to control panel
assembly.
7. Reassemble in reverse order.
NOTE: Do not flex p.c. board.
©2004 Maytag Services
16023057 Rev. 0
23
Disassembly Procedures
!
To avoid the risk of electrical shock, personal injury or
death; disconnect power to oven and discharge
capacitors before following any disassembly procedure.
W AR NIN G
Control Key Panel
The key panel has one ribbon connection on the p.c.
board.
Vent plate
The key panel pads can be checked through a continuity
test. Operations of key pad can be checked by
measuring connections at end of ribbon, (using high
ohms scale).
Power cord cover
Door
Plastic fastener
Hook
Mounting
plate
Outter case
Holes
Vent grille
Controller
F.P.C.
Stirrer Assembly
connector
Motor driven antenna assembly is located at the top of
the cavity, using a top feed wave guide.
Terminal
socket
Control Key Panel Removal
1. Disconnect power to oven.
2. Remove control panel, (see "Control Panel" section).
3. Discharge high voltage capacitor, (see "High Voltage
capacitor section).
4. Disconnect ribbon connector by sliding top part of
connector upward. Once in released position remove
ribbon from connector by siding ribbon side-to-side.
Stirrer Blade Removal
1. Disconnect power to oven and open the oven door.
2. Carefully pry downward on the plastic rivets securing
the stirrer cover.
3. Rotate slightly and pull down on stirrer fan cover .
4. Reassemble in reverse order.
NOTE: Caution should be used when removing cable
from connector. Ribbon cable has two holes
which connector locks ribbon in place.
5. Peel failed key pad off and replace with new key pad.
6. Reassemble in reverse order.
Outer Case
NOTE: This procedure requires removal of unit.
1. Disconnect power to oven and remove grille, (see
"Grille" procedure).
2. Remove oven door (see "Door Removal" procedure).
3. Remove screws securing air duct to outer case.
4. Remove screws securing outer case to the chassis.
5. Remove screws securing vent plate to outer case.
6. Remove screw securing power cord cover to outer
case and remove power cord cover (if equipped).
7. Slide outer case towards the rear of the unit, guide
power cord though outer case power cord hole.
8. Place outer case to the side, so no damage will
occur to the case.
9. Reassemble in reverse order.
24
16023057 Rev. 0
©2004 Maytag Services
Disassembly Procedures
!
To avoid the risk of electrical shock, personal injury or
death; disconnect power to oven and discharge
capacitors before following any disassembly procedure.
W AR NIN G
Interlock Door Latch Switches
Primary switch is operated by the top latch pawl.
Interlock Switch Removal
1. Disconnect power to oven and remove control panel,
(see "Control Panel" procedure).
2. Discharge high voltage capacitor, (see "High Voltage
Capacitor" procedure).
3. Test interlock switches before removing, (see Testing
Procedures).
4. Disconnect and label wire connections.
5. Remove interlock switch.
Latch Board
Primary Interlock Switch
BK(CN1)
RD(Oven TCO)
RD(H.V.Transformer)
WH(from Convection Heater)
Monitor Interlock Switch
Adjusting Interlocks
The interlock monitor and primary switches act as a final
safety switch, protecting the operator from microwave
energy. After adjusting the interlock switches, verify
connections are correctly connected.
For door fit and switch operation, switch housing is
adjustable.
1. Disconnect power to oven and remove control panel,
(see "Control Panel" procedure).
2. Discharge high voltage capacitor, (see "High Voltage
Capacitor" procedure).
3. Loosen switch housing mounting screws on vertical
flange.
4. Close oven door, move latch board upward toward
the top of the oven and/or away from the door latch
until gaps are less than 1/64–inch (0.5 mm).
5. Hold latch board securely for proper switch operation
and door fit, retighten screws.
6. Open the oven door slowly, watching the switches.
Verify switches release in the following order.
• Primary interlock switch
• Secondary interlock switch
• Monitor interlock switch
NOTE: Adjust the latch board until all switches operate
in proper sequence.
7. Close the oven door slowly, watching the switches.
Verify switches active in the following order.
• Monitor interlock switch
• Secondary interlock switch
• Primary interlock switch
8. When proper sequence of switch has been achieved,
tighten the latch board securely.
!
WH
CAUTION
A microwave leakage test must be preformed anytime
a door assembly is removed, replaced, disassembled
or adjustment of latch board is made.
RD/BK
Secondary Interlock Switch
PK(from P.C.B)
GN
!
CAUTION
Before replacing a blown monitor fuse, test the
primary interlock switch, secondary interlock switch,
monitor switch, and power relay contacts for proper
operation. If the monitor fuse is blown by a failed
switch operation, all switches and printed circuit board
must be replaced.
©2004 Maytag Services
16023057 Rev. 0
25
Disassembly Procedures
!
To avoid the risk of electrical shock, personal injury or
death; disconnect power to oven and discharge
capacitors before following any disassembly procedure.
W AR NIN G
High Voltage Capacitor
High voltage capacitor should always be discharged by
shorting a terminal to a chassis ground. The capacitor
has a internal "shunt" resistor, but the mechanical
discharge should always be performed to avoid personal
injury.
High Voltage Capacitor Removal
1. Disconnect power to oven and remove control panel,
(see "Control Panel" procedure).
2. Discharge high voltage capacitor by connecting a
jumper wire to the terminal of high voltage capacitor
with the diode connected to it. Connect the other
end of the jumper wire to a well insulated
screwdriver and touch a nearby chassis ground
screw.
3. Remove screws that secure capacitor and diode.
4. Slide capacitor mounting bracket out of the slots and
pull outward on capacitor, diode and bracket.
5. Reassemble in reverse order.
Diode
The diode is located next to the high voltage capacitor.
1. Disconnect power to oven and remove control panel,
(see "Control Panel" procedure).
2. Discharge high voltage capacitor, (see "High Voltage
Capacitor" procedure).
3. Disconnect diode wire terminal from high voltage
capacitor and remove screw securing diode to
ground.
4. Reassemble in reverse order.
Fuse Removal
1. Disconnect power and remove grille, (see "Grille
procedure).
2. Remove and replace fuse and reassemble in reverse
order.
!
CAUTION
Before replacing a blown monitor fuse, test the
primary interlock switch, secondary interlock switch,
monitor switch, and power relay contacts for proper
operation. If the monitor fuse is blown by a failed
switch operation, all switches and printed circuit board
must be replaced.
Magnetron
Magnetron is mounted on the side of the cavity to
provide a top feed single waveguide.
1. Disconnect power to oven and remove grille, (see
"Grille" procedure).
2. Remove control panel, (see "Control Panel"
procedure).
3. Remove outer case, (see "Outer Case" procedure).
4. Discharge high voltage capacitor, (see "High Voltage
Capacitor" procedure).
5. Remove screws securing magnetron to the wave
guide.
6. Carefully remove the magnetron.
7. Reassemble in reverse order.
Transformer
High voltage transformer can be serviced through the
front of the unit.
Power Transformer Removal
1. Disconnect power to oven and remove control panel,
(see "Control Panel" procedure).
2. Discharge high voltage capacitor, (see "High Voltage
Capacitor" procedure).
3. Disconnect and label wire leads from transformer.
4. Remove screws securing transformer and remove
out through the front.
5. Reassemble in reverse order.
Fuse
NOTE: When replacing the magnetron, make sure the
gasket is in the correct position and in good
condition.
The fuse is located behind the grille in line with the
power cord on the right side of the unit.
!
CAUTION
During replacement of magnetron, be certain the R.F.
anode gasket is in place around anode stud.
26
16023057 Rev. 0
©2004 Maytag Services
Disassembly Procedures
!
W AR NIN G
!
W ARNING
To avoid the risk of electrical shock, personal injury or
death; disconnect power to oven and discharge
capacitors before following any disassembly procedure.
A microwave leakage test must be performed anytime
a magnetron assembly is removed, replaced,
disassembled or adjusted for any reason.
Magnetron Fan Assembly
Magnetron fan motor provides cool air circulation from
an external air source, which provides direct cool air
through air vanes surrounding the magnetron. This
assembly is located above the magnetron.
Humidity Sensor Removal
1. Disconnect power to oven and remove control panel,
(see "Control Panel" procedure).
2. Discharge high voltage capacitor, (see "High Voltage
Capacitor" procedure).
3. Remove outer case, (see "Outer Case" procedure).
4. Remove screws securing sensor to air duct.
5. Disconnect wire terminal plug and replace with new
sensor.
6. Reassemble in reverse order.
Magnetron Fan Removal
1. Follow steps 1 through 4 of "Magnetron" procedure.
2. Remove fan blade from fan motor.
3. Remove screws securing fan motor to air duct.
4. Disconnect wires from fan motor, and lift fan motor
assembly out.
5. Reassemble in reverse order.
Magnetron Thermal Fuse
NOTE: Thermal fuse is not resettable.
1. Disconnect power to oven and remove control panel,
(see "Control Panel" procedure).
2. Discharge high voltage capacitor, (see "High Voltage
Capacitor" procedure).
3. Remove outer case, (see "Outer Case" procedure).
4. Disconnect and label wire terminals.
5. Remove screw securing thermal fuse to cooling fan.
6. Replace and reassemble in reverse order.
Magnetron Thermal Fuse
Fan Motor
Oven Thermostat
The oven thermostat is on the air duct assembly.
Thermostat is a resettable thermostat.
1. Disconnect power to oven and remove control panel,
(see "Control Panel" procedure).
2. Discharge high voltage capacitor, (see "High Voltage
Capacitor" procedure).
3. Remove outer case, (see "Outer Case" procedure).
4. Disconnect wire terminals from oven thermostat.
NOTE: Lift upward on left rear corner of air duct to
release oven thermostat.
Humidity Sensor
The sensor is a plug-in device located in the air exhaust
duct.
©2004 Maytag Services
16023057 Rev. 0
27
Disassembly Procedures
!
To avoid the risk of electrical shock, personal injury or
death; disconnect power to oven and discharge
capacitors before following any disassembly procedure.
W AR NIN G
Turntable Motor
3. Remove damper.
4. Lift blower assembly out and disconnect wire
connection wire terminal.
1. Disconnect power to oven.
2. Remove screws securing bottom plate cover.
5. Reassemble in reverse order.
NOTE: Place blower assembly wires in slotted area to
avoid pinching of wires.
3. Open the oven door, remove turntable, and gently pry
upward on turntable shaft.
4. Disconnect wire leads from turntable motor.
Wire leads
Turntable motor
5. Remove screws securing turntable to the oven cavity.
6. Replace and reassemble in reverse order.
Vent Blower
Vent blower is a five speed capacitor run blower
assembly located on top of the oven. The blower is
operated by voltage relays located on the p.c. board.
Vent Exhaust Blower Removal
1. Disconnect power to unit and remove unit from its
installation.
2. Remove screws securing damper and motor
assembly to top and back of unit.
Convection Motor Removal
1. Disconnect power to oven.
2. Discharge high voltage capacitor, (see "High Voltage
Capacitor" procedure).
3. Remove outer case, (see "Outer Case" procedure).
4. Remove screws securing back cover and pull the top
of back cover downward sliding metal tab on right
side from oven cavity.
5. Remove screws securing air duct to chassis and
other components.
6. Disconnect wire leads from air duct.
7. Remove magnetron (see "Magnetron" procedure).
8. Remove screws securing bottom plate to chassis.
9. Disconnect wire leads from convection chamber.
10.Remove screws securing convection chamber
assembly and lift chamber assembly from oven
cavity.
11. Slide inner convection fan blade off convection motor
shaft.
12.Remove hex nuts securing convection motor to
bracket.
13.Replace and reassembly in reverse order.
Blower
plate
Blower
unit
B
B
Blower unit
mounting screw
28
16023057 Rev. 0
©2004 Maytag Services
Disassembly Procedures
!
To avoid the risk of electrical shock, personal injury or
death; disconnect power to oven and discharge
capacitors before following any disassembly procedure.
W AR NIN G
Convection Heater Element Removal
Grill Heater Element Removal
1. See “Convection Motor Removal”, perform steps 1
through 9.
2. Remove screws at and next to terminals securing
wires and element to heater box.
3. Release metal clip securing element to heater box.
4. Remove element from heater box.
5. Replace and reassembly in reverse order.
1. Disconnect power to oven.
2. Discharge high voltage capacitor, (see "High Voltage
Capacitor" procedure).
3. Remove outer case, (see "Outer Case" procedure).
4. Remove screws securing back cover and pull the top
of back cover downward sliding metal tab on right
side from oven cavity.
5. Remove screws securing air duct to chassis and
other components.
6. Disconnect wire leads from air duct.
7. Remove screw securing upper insulator.
8. Remove screws securing the heater terminal and
heater barrier.
9. Remove screws securing the heater holding bracket.
10.Remove grill heater from cavity.
11. Replace and reassembly in reverse order.
Light Socket
1.
2.
3.
4.
5.
6.
Disconnect power to oven.
Remove Grille (see "Grille" procedure).
Remove screws securing bulb holder.
Remove light bulb and socket.
Disconnect wire terminal plug.
Replace and reassemble in reverse order.
©2004 Maytag Services
16023057 Rev. 0
29
Appendix A
©2004 Maytag Services
16023057
A–1
Installation Instructions
A–2
16023057
©2004 Maytag Services
Installation Instructions
Refer to Service Parts Catalog for correct
Upper Cabinet Template part number.
©2004 Maytag Services
16023057
A–3
Installation Instructions
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Carton or other heavy material for covering the counter top.
Clear Tape
(for taping the templates to the wall)
Stud Finder or Thin Nail
Keyhole Saw (for the power cord hole)
Saber Saw
(for cutting vent holes for roof
or wall vending)
Electric Drill
Phillips Screwdriver
(for the screws)
3/8” and 3/4” wood drill bits
1/2” and 3/16”
drill bits
Pencil
Flat Blade Screwdriver
(for the toggle bolts)
Plumb Line
Measuring Tape
(metal preferred)
Duct Tape
Small Side Cutters or Tin Snips
Caulking Gun
: If you have brick or masonry walls, you will need special hardware and tools.
: The ductwork you need for the installation is not included. All wall and roof caps must have a back-draft damper.
(Shown on page 6).
7
A–4
16023057
©2004 Maytag Services
Installation Instructions
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1. Locate the grounded electric outlet for this oven in the
cabinet above the oven, as shown in Figure 4.
r‚
`~†‹‚‘
klqbW The outlet should be on a circuit dedicated to the
microwave oven (120V, 60 Hz., AC only) with a 15 or 20A
fused electrical supply.
fjmloq^kqW If you do not have the proper wall outlet,
you MUST have one installed by a qualified electrician.
2. You will cut the power-supply-cord hole (shown in Figure 4)
later when you prepare the wall and upper cabinet in Step 4.
klqbW Do not use an extension cord.
Keep the power cord dry and do not pinch or crush it.
dŒ’‹‚ l’‘‰‚‘
(Inside Cabinet)
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: DO NOT, UNDER ANY CIRCUMSTANCES, REMOVE THE POWER SUPPLY CORD
GROUNDING PRONG!
: This appliance MUST be grounded!
8
©2004 Maytag Services
16023057
A–5
Installation Instructions
Models AMC4080AA*, MMC5080AA*
A–6
16023057
©2004 Maytag Services
Installation Instructions
pqbm OW m‚~‚ q…‚ s‚‹‘†‹„ p–‘‚Š
p‘~‹~ c†‘‘†‹„
klqbW If the existing duct is round, you must use a rectangular-to-round adapter, with a rectangular 3” extension
duct installed between the damper assembly and the adapter to prevent the exhaust damper’s sticking.
a’€‘ i‚‹„‘…
The total length of the duct system, including straight duct, elbows, transitions, and wall or roof caps Š’‘ ‹Œ‘
‚•€‚‚ ‘…‚ ‚Ž’†“~‰‚‹‘ Œƒ NQM ƒ‚‚‘.
For best performance, do not use more than three 90 degree elbows, and keep length as short as possible.
Below are the standard fittings and their equivalent length in feet.
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b•~Š‰‚
cŒ P NLQ³•NM³ pvpqbjp
1-3 1/4” x 10” 90° elbow
1-Wall Cap
8 feet straight duct
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=
=
=
Z
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1-transition
2-90° elbows
1-Wall Cap
8 feet straight
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25 ft.
40 ft.
8 ft.
TP ƒ‘K
= 5 ft.
= 20 ft.
= 40 ft.
= 8 ft.
Z TP ƒ‘K
10
©2004 Maytag Services
16023057
A–7
Installation Instructions
STEP 3: Prepare The Venting Blower
W A R N I N G
To avoid risk of property damage, unplug the microwave oven or disconnect power at
source by removing fuse or throwing circuit breaker.
To avoid risk of personal injury, wear protective gloves when handling mounting plate.
DO NOT PULL OR STRETCH THE BLOWER WIRING! Pulling and stretching the blower wiring could result in electrical
shock.
Your microwave oven is shipped with the blower assembled for room (recirculating) venting.
If you want wall - venting or roof venting installation, you must change the blower, as detailed below.
A thick, protective
covering
Before You Start
1. Remove any shipping materials and parts from inside the
microwave oven.
2. Cover the counter top or cooktop with a thick, protective
covering to protect it from damage and dirt. See Figure 10.
NOTE: If you have a free-standing range, disconnect it, move it
onto a piece of cardboard or hardboard and pull it away
from the wall, so that you can get closer to the upper
cabinet and back wall for easier measuring and drilling.
Figure 10
Mounting plate
Mounting plate
screw(s)
(1 or 2 screws)
Remove The Mounting Plate:
1. Remove mounting plate screw(s) (1 or 2 screws) from the
mounting plate as shown and discard. See Figure 11.
2. This plate will be used as the rear mounting plate. (It will be
used to locate and mark the mounting holes on the rear wall.)
3. Locate exhaust adaptor, grease filters and hardware packet.
4. At this point, remove any adhesive tape (if there is any), on the
exhaust adaptor, the grease filters and the power supply cord.
Control Panel Side
Mounting plate
Mounting plate
screw(s)
(1 or 2 screws)
Control Panel Side
Room-Vented (recirculating) Installation:
Figure 11
This oven is shipped assembled for room-vented.
Blower Plate Screw
Wall-Vented Installation:
1. Remove one blower unit mounting screw and one or two
blower plate screw(s). Remove the blower plate from cabinet.
See Figure 12.
2. Carefully lift the blower unit out of the microwave oven.
3. Use side cutters or thin snips to cut and remove parts “B”
from Back plate. Discard parts "B". Be careful not to distort
the plate. See Figure 13.
Blower Plate
Back Plate
Blower Unit
Blower Unit
Mounting Screw
Parts “B”
Figure 12
Knock out Parts “B”
Parts “B”
Figure 13
11
A–8
16023057
©2004 Maytag Services
Installation Instructions
©2004 Maytag Services
16023057
A–9
Installation Instructions
STEP 4: Prepare The Wall & Upper Cabinet
W A R N I N G
To avoid personal injury or property damage, do not attempt to install this microwave
oven if you cannot find a wall stud.
Measure And Track/Tape Up The Templates
1. Using a plumb line and (metal) measuring tape, find and mark
the vertical center line on the back wall, as in Figure 22.
2. Find and mark one or two points where the studs are on the
wall. (Studs are normally 16 inches apart). Then measure and
mark the stud locations. If you cannot find any wall stud,
consult a local building contractor.
CAUTION
DO NOT ATTEMPT TO INSTALL THE MICROWAVE OVEN IF YOU CANNOT FIND A WALL
STUD.
3. Line up the plumb line on the wall with the center line on the
mounting plate.
Figure 22
NOTE: Be sure the minimum width is 30 inches and the distance
from the top of the wall template to the range or counter
top is at least 30 inches. See Figure 22.
4. Center mounting plate in operating by lining up the plumb line
on wall with centerline on mounting plate. Make sure the
minimum width is 30 inches and that the top of the mounting
plate is located a minimum of 30 inches above the cooking
surface. See Figure 23.
upper cabinet template
mounting plate
NOTE: If the cabinets are not plumb, adjust the mounting plate
to the cabinets. If the front edge of the cabinet is lower
than the back edge, adjust the mounting plate to be level
with the cabinet front.
5. Measure the bottom of the upper cabinet frame. Trim the
edges A, B and C on the upper cabinet template so that the
template will fit on the bottom of the upper cabinet. If upper
cabinet has a recessed frame, trim the template so it fits inside
the recessed area. Align the centerline of the upper cabinet
template with the centerline of the mounting plate, then
securely tape or tack the upper cabinet template in place. See
Figure 23.
(1 piece mounting plate)
upper cabinet template
mounting plate
(3 pieces mounting plate)
Figure 23
13
A – 10
16023057
©2004 Maytag Services
Installation Instructions
pqbm QW m‚~‚ q…‚ t~‰‰ C r‚ `~†‹‚‘
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qŒ ~“Œ† †ˆ Œƒ ‚Œ‹~‰ †‹‡’–I ‚‰‚€‘†€~‰ …Œ€ˆ Œ ‚~‘…W
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1. Find the points on the mounting plate labeled A, B, C, and D.
Drill a 3/16” diameter hole at any points that are over a wall
stud. Drill a 3/4” diameter hole at any points over drywall.
cabinet front
filler block
cabinet
bottom shelf
2. Drill a 3/8” hole at points J, K, and N on the upper cabinet
template.
klqbW If the bottom of the upper cabinet is recessed 3/4” or
more, you will need 2”x2” filler blocks (not included) to
provide additional support for the bolts. See Figure 24.
c†„’‚ OQ
: Mark the center of each filler block and drill a 3/8”
diameter hole at the marks.
: Align filler blocks over the two openings in the top of
the microwave oven cabinet and attach to cabinet with
masking tape. See Figure 25.
3. Cut or drill a 2” diameter hole at the area marked M. Power
supply cord hole on the upper cabinet template. If the upper
cabinet is metal, you will need to cover the edge of the hole
with the power supply cord bushing (supplied) to prevent
damage to the cord from the rough metal edge.
filler
block
4. Cut out the venting areas (with the saber saw):
: Roof-Vented: cut out the shaded area marked L on the
upper cabinet template.
: Room-Vented: go to STEP 5, INSTALL THE MOUNTING
PLATE, located on page 15.
c†„’‚ OR
5. Complete whichever venting system you have chosen. Use
caulking compound to seal the exterior wall or roof opening
around the wall cap or roof cap.
14
©2004 Maytag Services
16023057
A – 11
Installation Instructions
STEP 5: Install The Mounting Plate
The Oven Must Be Connected To At Least One
Wall Stud.
1. Draw a vertical line on the wall at the center of the 30 wide
space. Use the mounting plate as the template for the rear
wall. Place the mounting plate on the wall, making sure that
the tabs are against the bottom of the cabinet. Line up the
notch and center line on the mounting plate to the center line
on the wall.
3/16 Hole on Studs
5/8 Hole on Dry wall Only
Minimum 66"
From the Floor
For WallVented Only
2. While holding the mounting plate with one hand, draw circles
on the wall at holes A, B, C and D. Four holes must be used
for mounting. If the holes are not used, the installation will not
be secure. Installer must use these holes for proper
installation. Use toggle bolts through these holes unless one of
them lines up with a stud. Use a wood screw for studs.
Draw Lines
on Studs
Mounting
Plate
Draw
Center Line
A
NOTE: Draw a fifth circle inside area E, through one of the
bottom holes to match the location of a stud.
For wall-vented: The oven requires a rear wall cutout opening for
the rear wall duct and the exhaust adaptor must be attached to
the mounting plate. See the next page on how to prepare the rear
wall cutout opening and the exhaust adaptor/mounting plate for
wall-vented.
3. Drill holes on the circles. If there is a stud, drill a 3/16 hole for
lag screws. If there is no stud, drill a 5/8 hole for toggle bolts.
Make sure to use at least 1 lag screw in a stud, and 4 toggle
bolts in the drywall or the plaster.
4. Attach the plate to the wall. To use spring toggle head bolts:
Remove the toggle wings from the bolts. Insert the bolts into
the mounting plate and replace the spring toggle head to 3/4
past the bolt ends. Insert the spring toggle head into the holes
in the wall to mount the plate. You may pull forward on the
plate to help in tightening the toggle bolts. Tighten all bolts.
B
C
D
Center Line
E
Support Tab
Support Tab
(1 piece mounting plate)
3/16 Hole on Studs
5/8 Hole on Dry wall Only
Minimum 66"
From the Floor
For WallVented Only
Draw Lines
on Studs
Draw
Center Line B
A
Mounting
Plate
Space More Than Wall Thickness
Toggle Wings
Mounting
Plate
C
D
Center Line
Toggle Bolt
Bolt
End
E
Support Tab
Support Tab
(3 pieces mounting plate)
Wall
Figure 27
Figure 26
15
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16023057
©2004 Maytag Services
Installation Instructions
©2004 Maytag Services
16023057
A – 13
Installation Instructions
STEP 6: Attach The Oven To The Wall
W A R N I N G
To avoid risk of personal injury or property damage, you will need two people to
install this microwave oven.
1. Carefully lift microwave oven and hang it on support tabs (See
Figure 26 at the bottom of the mounting plate.) Reaching
through upper cabinet, thread power supply cord through the
power supply cord hole in the bottom of the upper cabinet. See
Figure 30.
power cord
power cord
hole
2. Rotate the microwave oven upward so the top of oven is
against the bottom of the upper cabinet or cabinet frame.
3. Insert a bolt down through each hole in the upper cabinet
bottom. See Figure 31.
Tighten the bolts until the gap between the upper
cabinet and microwave oven is closed.
4. If wall vented or room vented installation is used, go to
No.7 on the next page.
Figure 30
Figure 31
17
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16023057
©2004 Maytag Services
Installation Instructions
STEP 6: Attach The Oven To The Wall
5. Roof venting installation: Install ductwork through the vent
opening in the upper cabinet. Complete the venting system
through the roof according to the method needed. See Figure
33. See PREPARE THE VENTING SYSTEM, STEP 2. Use
caulking gun to seal the exterior roof opening around the
exhaust cap. See Figure 6.
6. Use the power supply cord clamp to bundle the power supply
cord. Install the power supply cord clamp, using a screw as
shown in Figure 33, to inside of the cabinet.
Figure 32
7. Grasp filter screen with one hand holding the ring and the
other hand holding the opposite end. Insert the end of the
filter screen without ring into the opening and slide towards
the side of the microwave oven. Insert ring end of filter
screen into the opening and slide entire screen towards the
center of the microwave until screen is securely in position.
Repeat for other filter screen. See Figure 34.
Figure 33
8. Plug in the power supply cord.
9.
your microwave oven.
Figure 34
18
©2004 Maytag Services
16023057
A – 15
Appendix B
©2004 Maytag Services
16023057 Rev. 0
B– 1
Use and Care Information
B–2
16023057 Rev.0
©2004 Maytag Services
Use and Care Information
©2004 Maytag Services
16023057 Rev. 0
B– 3