Maytag Gemini MER6770AAW User manual

Maytag
Gemini™
Range
Service Manual
16010107
Issued10/00

©2000 Maytag Appliances Sales Company
16010107 Introduction i
INTRODUCTION
The manual is printed in a loose format and is divided into sections relating to a general
group of components and/or service procedures. Each section is further subdivided to
describe a particular component or service procedure.
The subdividing of the subject matter, plus the loose leaf form, will facilitate the updating of
the manual as new revised components are added or new models are introduced.
Each page of the manual will be identified in the lower, left and right-hand corners, and as
new or revised pages are published, the manual can easily be updated by following the filing
instructions on the cover letter of the supplement.
This service manual is a valuable tool and care should be taken to keep it up-to-date by
promptly and proper filing of subsequent pages as they are used.
MODELS COVERED IN THIS MANUAL:
MER6770AAW
MER6770AAB
MER6770AAC

©2000 Maytag Appliances Sales Company
16010107 Introduction ii

©2000 Maytag Appliances Sales Company
16010107 Contents iii
CONTENTS
INTRODUCTION............................................................................................................................... i
CONTENTS..................................................................................................................................... iii
SECTION 1. GENERAL INFORMATION ....................................................................................1-1
SECTION 2. ELECTRICAL COMPONENTS & TESTING...........................................................2-1
SECTION 3. COMPONENT ACCESS ......................................................................................... 3-1
EXPLODED VIEW ......................................................................................................................3-1
MAIN TOP .................................................................................................................................. 3-2
ELEMENTS.................................................................................................................................3-2
Ceran Element ......................................................................................................................3-2
Bake Element ........................................................................................................................3-3
Broil Element........................................................................................................................ 3-3
Oven Sensor.........................................................................................................................3-3
Oven Cavity Components (Electric) ...................................................................................3-4
Convect Fan Motor and Blade (Electric) ............................................................................3-5
ELECTRONIC CLOCKAND OVEN CONTROL .........................................................................3-6
INFINITE SWITCH (Current Sensing) .......................................................................................3-6
Signal Lights......................................................................................................................... 3-7
"Hot Surface" Light ...............................................................................................................3-7
Oven Light Replacement .....................................................................................................3-7
HI-LIMIT THERMOSTAT............................................................................................................3-8
OVEN DOOR(S).........................................................................................................................3-8
UPPERDOOR ............................................................................................................................3-9
LOWER DOOR ......................................................................................................................... 3-10
Lower Latch Assembly ......................................................................................................3-10
LOWER LATCH ASSEMBLY....................................................................................................3-11
Oven Door Hinge ...............................................................................................................3-11
LEVELINGLEGS.......................................................................................................................3-12
CONVENIENCE OUTLET (Canadian Models Only)...............................................................3-12
SPECIFICATIONS.....................................................................................................................3-12
OVEN RACKS ..........................................................................................................................3-12
RACK POSITIONS ................................................................................................................... 3-13
HALF RACK ACCESSORY ......................................................................................................3-13
SECTION 4. ELECTRICAL ...........................................................................................................4-1
TOASTING CIRCUIT (Upper Oven Only) .................................................................................4-1
OVEN CIRCUITS ........................................................................................................................4-1
SURFACE ELEMENTS - CERAN ...............................................................................................4-2
DUEL ELEMENT.........................................................................................................................4-2
PROBE, SENSOR / BOTH OVENS............................................................................................4-2
HOT SURFACE LIGHTS.............................................................................................................4-3
SURFACE INICATOR LIGHTS....................................................................................................4-3
TRANSFORMER, STEPDOWN (12V) .......................................................................................4-4

©2000 Maytag Appliances Sales Company
16010107 Contents iv
SURFACE ELEMENT SWITCH ..................................................................................................4-4
DUAL ELEMENT SWITCH ......................................................................................................... 4-4
ELECTRICAL CONNECTIONS/VOLTAGE.................................................................................4-5
SECTION 5. TROUBLESHOOTING............................................................................................ 5-1
GEMINI DOUBLE OVEN CONTROLS.......................................................................................5-1
FAULT CODES ...........................................................................................................................5-2
RELAY BOARD ..........................................................................................................................5-3
TROUBLESHOOTING GUIDE....................................................................................................5-4
PARTS LIST................................................................................................................................5-6
FAULT IDENTIFICATIONS SUMMARY.....................................................................................5-7
SECTION 6. WIRING DIAGRAMS..............................................................................................6-1

©2000 Maytag Appliances Sales Company
16010107 Section 1. General Information 1-1
SECTION 1. GENERAL INFORMATION
Bake: There will be two separate bake keys,
one for each oven. When the upper oven is
chosen there will be a rapid preheat
activated which turns both elements on. If
the lower oven is selected the elements will
cycle at the normal rate. The normal rates
for the bake functions in both ovens are: 6
seconds for the broil element, followed by 54
seconds for the bake element.
Broil: There will be two separate broil keys,
one for each oven. The HI broil function
controls the broil element at 100%, the LO
broil is controlled at 80% on time of a 60
second duty cycle. HI broil will be
maintained to reach a maximum
temperature of 550ºF, LO boil will be
maintained at a maximum of 450ºF.
Toasting: Available in upper oven only.
Toasting has a maximum allowable time of
10 minutes and maximum temperature of
550ºF. Toasting is only available when the
lower oven is not in use. If chosen during
lower oven operation the display will scroll
an information message regarding use.
Keep Warm: The keep warm function
controls only the bake element and is
available in the upper oven only. Allowable
temperature range is 145 to 190ºF.
Clean: Only one oven is permitted to be
cleaned at a time. Both ovens will lock
during clean cycle. The clean cycle controls
both the broil and the bake element, the broil
element is on 100% for the first 40 minutes
of the cycle followed by the bake element on
100% for the duration of the cycle. The bake
element is cycled once the clean
temperature of 865º is reached.
Motorized Door Lock: A 3 RPM motor is
used on the door lock assemblies, with each
assembly having a locked and unlocked
switch. The motor will only run when a
clean cycle is chosen and the door actuated
switch is in the closed position.

©2000 Maytag Appliances Sales Company
16010107 Section 1. General Information 1-2

©2000 Maytag Appliances Sales Company
16010107 Section 2. Electrical Components & Testing 2-1
SECTION 2. ELECTRICAL COMPONENTS & TESTING
ELECTRICAL TEST EQUIPMENT
The equipment required to service Maytag
products depends largely upon the condition
you encounter. Locating a malfunction will
often require the use of electrical testing
equipment such as:
Analog Test Meter
can be used to check for
open or closed circuits,
measure resistance, AC
and DC volts, and tem-
perature.
Clamp-On Ammeter
can be used to detect
shorts. Over-
loads on the
circuit breaker
or fuse can be
traced to either
the dryer or circuit
breaker by check-
ing the dryer
current draw.
Description Part Number
Analog Test Meter 20000005
Digital Watt/Amp/Volt/Ohm/
Temperature Meter 20000019
Clamp-On Ammeter 20000002
AC Voltage Sensor 20000081
AC Voltage Sensor
can be used to alert you
if AC voltage is present so
proper safety precautions can
be observed. The tip of the sensor
will glow bright red, if voltage is be-
tween 110-600 volts AC.
Digital Watt/Amp/Volt/Ohm/Temperature
Meter
Measures power (wattage), AC/DC volts, AC/
DC amps, temperature (C & F) OHMS resis-
tance, continuity and capacitance. Features
large LCD display w/backlight and analog
bar graph to show tendencies. Includes: AC
power adaptor for measuring wattage and
meter leads.

©2000 Maytag Appliances Sales Company
16010107 Section 2. Electrical Components & Testing 2-2

©2000 Maytag Appliances Sales Company
16010107 Section 3. Component Description 3-1
SECTION 3. COMPONENT ACCESS
EXPLODED VIEW