SHARP KB3401LK LS, KB-3401LK, KB-3401LW Service Manual
KB-3401LS
KB-3401LK
KB-3401LW
SUPPLEMENTAL SERVICE MANUAL
S76R266KB3401F
FREE STANDING RANGE
WITH MICROWAVE DRAWER
MODELS
KB-3401LS
KB-3401LK
KB-3401LW pictured
This is a supplemental Service Manual and is quite similar to the base models KB-3300JS/JK/JW; (S74R243KB330J). This
supplemental manual must be used in conjunction with the base model service manual for complete operation, service, safety
and replacement parts information.
WARNING TO SERVICE PERSONNEL:
This service manual is intended for use by persons having electrical and mechanical training and a level of
knowledge of these subjects generally considered acceptable in the appliance repair trade. Sharp Electronics
Corporation cannot be responsible, nor assume any liability, for injury or damage of any kind arising from the
use of this manual.
Microwave ovens contain circuitry capable of producing very high voltage and current. Contact with the
following parts may result in a severe, possibly fatal, electrical shock. (High Voltage Capacitor, High Voltage
Power Transformer, High Voltage Rectifier and Heat sink etc., and Magnetron, High Voltage Harness etc..)
TABLE OF CONTENTS
Page
PRECAUTIONS TO BE OBSERVED BEFORE AND DURING SERVICING TO
AVOID POSSIBLE EXPOSURE TO EXCESSIVE MICROWAVE ENERGY ..................... INSIDE FRONT COVER
BEFORE SERVICING ....................................................................................................... INSIDE FRONT COVER
WARNING TO SERVICE PERSONNEL ................................................................................................................. 3
MICROWAVE MEASUREMENT PROCEDURE .....................................................................................................5
FOREWORD AND WARNING ............................................................................................................................... 7
PRODUCT SPECIFICATIONS ............................................................................................................................... 8
POWER CONNECTION ....................................................................................................................................... 10
ANTI-TIP DEVICE ................................................................................................................................................ 12
CONTROL LAYOUT ............................................................................................................................................. 13
SCHEMATICS ...................................................................................................................................................... 14
TOUCH CONTROL PANEL ASSEMBLY .............................................................................................................. 18
OVEN/MICROWAVE DRAWER DISASSEMBLY .................................................................................................. 23
WIRING DIAGRAMS ............................................................................................................................................ 33
PRINTED WIRING BOARDS ............................................................................................................................... 39
PARTS LIST ......................................................................................................................................................... 44
PACKING AND ACCESSORIES .......................................................................................................................... 56
KB-3401LW
SHARP ELECTRONICS CORPORATION
This document has been published to be used for after sales service only. The contents are subject to change without notice.
1
KB-3401LS
KB-3401LK
KB-3401LW
PRECAUTIONS TO BE OBSERVED BEFORE AND DURING SERVICING TO AVOID POSSIBLE EXPOSURE TO
EXCESSIVE MICROWAVE ENERGY
(a) Do not operate or allow the oven to be operated with the door open.
(b) Make the following safety checks on all ovens to be serviced before activating the magnetron or other microwave
source, and make repairs as necessary: (1) interlock operation, (2) proper door closing, (3) seal and sealing
surfaces (arcing, wear, and other damage), (4) damage to or loosening of hinges and latches, (5) evidence of
dropping or abuse.
(c) Before turning on microwave power for any service test or inspection within the microwave generating compart-
ments, check the magnetron, wave guide or transmission line, and cavity for proper alignment, integrity, and
connections.
(d) Any defective or misadjusted components in the interlock, monitor, door seal, and microwave generation and
transmission systems shall be repaired, replaced, or adjusted by procedures described in this manual before
the oven is released to the owner.
(e) A microwave leakage check to verify compliance with the Federal Performance Standard should be performed
on each oven prior to release to the owner.
BEFORE SERVICING
Before servicing an operative unit, perform a microwave emission check as per the Microwave Measurement Procedure outlined in this service manual.
If microwave emissions level is in excess of the specified limit, contact SHARP ELECTRONICS CORPORATION immediately @1-800-237-4277.
If the unit operates with the door open, service person should 1) tell the user not to operate the oven
and 2) contact SHARP ELECTRONICS CORPORATION and Food and Drug Administration's Center for
Devices and Radiological Health immediately.
Service personnel should inform SHARP ELECTRONICS CORPORATION of any certified unit found with
emissions in excess of 4mW/cm2. The owner of the unit should be instructed not to use the unit until the
oven has been brought into compliance.
2
WARNING TO SERVICE PERSONNEL
Range units contain circuitry capable of producing very high voltage and current, contact
with following parts
(Example)
High Voltage Capacitor, High Voltage Power Transformer, Magnetron, High Voltage Rectifier
Assembly, High Voltage Harness, Heating Elements, etc..
Read the Service Manual carefully and follow all instructions.
Before Servicing
1. Disconnect the power supply cord , and then
remove cabinet.
2. Open the drawer and keep it open.
3. Discharge high voltage capacitor.
WARNING: RISK OF ELECTRIC SHOCK.
DISCHARGE THE HIGH-VOLTAGE
CAPACITOR BEFORE SERVICING.
may result in a severe, possibly fatal, electrical shock.
KB-3401LS
KB-3401LK
KB-3401LW
When the testing is completed,
1. Disconnect the power supply cord, and then remove
covers.
2. Open the drawer and keep it open.
3. Discharge high voltage capacitor.
4. Reconnect the leads to the primary of the power
transformer.
5. Reinstall the covers.
6. Reconnect the power supply cord.
7. Run the unit and check all functions.
The high-voltage capacitor remains charged about 60
seconds after the oven has been switched off. Wait for
60 seconds and then short-circuit the connection of the
high-voltage capacitor (that is the connecting lead of the
high-voltage rectifier) against the chassis with the use of
an insulated screwdriver.
Whenever troubleshooting is performed the power supply
must be disconnected. It may, in some cases, be necessary
to connect the power supply after the outer case has been
removed, in this event:
1. Disconnect the power supply cord, and then remove
neccessary covers.
2. Open the drawer and keep it open.
3. Discharge high voltage capacitor.
4. Disconnect the leads to the primary of the power
transformer.
5. Ensure that the leads remain isolated from other
components and oven chassis by using insulation tape.
6. After that procedure, reconnect the power supply cord.
After repairing
1. Reconnect all leads removed from components during
testing.
2. Reinstall the covers.
3. Reconnect the power supply cord.
4. Run the oven and check all functions.
Microwave ovens should not be operated empty. To test for
the presence of microwave energy within a cavity, place a
cup of cold water on the oven tray, close the drawer and set
the power to HIGH and set the microwave timer for two (2)
minutes. When the two minutes has elapsed (timer at zero)
carefully check that the water is now hot. If the water remains
cold carry out Before Servicing procedure and re-examine
the connections to the component being tested.
When all service work is completed and the oven is fully
assembled, the microwave power output should be checked
and a microwave leakage test should be carried out.
3
KB-3401LS
ATTENTION!!!
This service manual is intended for use by persons having electrical and mechanical training
and a level of knowledge of these subjects generally considered acceptable in the appliance
repair trade. Sharp Electronics Corporation cannot be responsible, nor assume any liability,
for injury or damage of any kind arising from the use of this manual.
SAFE SERVICING PRACTICES
To avoid personal injury and/or property damage, it is important that Safe Servicing
Practices be observed. The following are some limited examples of safe practices:
1. DO NOT attempt a product repair if you have any doubts as to your ability to
complete it in a safe and satisfactory manner.
2. Before servicing or moving an appliance:
• Remove the power cord from the electrical outlet, trip the circuit breaker to the
OFF position, or remove the fuse.
3. Never interfere with the proper operation of any safety device.
4. USE ONLY SHARP AUTHORIZED PARTS FOR THIS APPLIANCE.
SUBSTITUT ION S MAY DEFEAT COM PLIANCE WITH SA FETY
STANDARDS SET FOR HOME APPLIANCES.
5. GROUNDING : The standard color coding for safety ground wires is GREEN, or
GREEN with YELLOW STRIPES . Ground leads are not to be used as current
carrying conductors. It is EXTREMELY important that the service technician
reestablish all safety grounds prior to completion of service. Failure to do so will
create a hazard.
6. Prior to returning the product to service, ensure that:
• All electrical connections are correct and secure
• All electrical leads are properly dressed and secured away from sharp edges,
high-temperature components, and moving parts
• All non-insulated electrical terminals, connectors, heaters, etc. are adequately
spaced away from all metal parts and panels
• All safety grounds (both internal and external) are correctly and securely
connected
• All panels are properly and securely reassembled
KB-3401LK
KB-3401LW
4
KB-3401LS
KB-3401LK
KB-3401LW
MICROWAVE MEASUREMENT PROCEDURE
A. Requirements:
1) Microwave leakage limit (Power density limit): The power density of microwave radiation emitted by a microwave
oven should not exceed 1mW/cm2 at any point 5cm or more from the external surface of the oven, measured prior to
acquisition by a purchaser, and thereafter (through the useful life of the oven), 5 mW/cm2 at any point 5cm or more
from the external surface of the oven.
2) Safety interlock switches:
Primary interlock relay switch shall prevent microwave radiation emission in excess of the requirement as above
mentioned. Secondary interlock relay and door sensing switch shall prevent microwave radiation emission in excess
of
5 mW/cm2 at any point 5cm or more from the external surface of the oven.
B. Preparation for testing:
Before beginning the actual measurement of leakage, proceed as follows:
1) Make sure that the actual instrument is operating normally as specified in its instruction booklet.
Important:
Survey instruments that comply with the requirement for instrumentation as prescribed by the performance standard for
microwave ovens, 21 CFR 1030.10(c)(3)(i), must be used for testing.
2) Place the load of 275±15 ml (9.8 oz) of tap water initially at 20±5
The water container shall be a low form of 600 ml (20 oz) beaker with an inside diameter of approx. 8.5 cm (3-1/2 in.)
and made of an electrically nonconductive material such as glass or plastic.
The placing of this standard load in the oven is important not only to protect the oven, but also to insure that any leakage
is measured accurately.
3) Set the cooking control on Full Power Cooking Mode.
4) Close the drawer and select a cook cycle of several minutes. If the water begins to boil before the survey is completed,
replace it with 275 ml of cool water.
O
C (68OF) in the center of the oven cavity.
C. Leakage test:
Closed-drawer leakage test (microwave measurement):
1) Grasp the probe of the survey instrument and hold it perpendicular to the gap between the drawer and the body of the
oven.
2) Move the probe slowly, not faster than 1 in./sec. (2.5 cm/sec.) along the gap, watching for the maximum indication on
the meter.
3) Check for leakage at the drawer screen, sheet metal seams and other accessible positions where the continuity of the
metal has been breached (eg., around the switches, indicator, and vents).
While testing for leakage around the drawer, pull the drawer away from the front of the oven as far as is permitted by
the closed latch assembly.
4) Measure carefully at the point of highest leakage and make sure that the highest leakage is no greater than 4mW/cm2,
and that the primary interlock switch/secondary interlock relay does turn the oven OFF before any door movement.
5
KB-3401LS
KB-3401LK
KB-3401LW
NOTES
6
SERVICE MANUAL
FREE STANDING RANGE
WITH MICROWAVE DRAWER
KB-3401LS
KB-3401LK / KB-3401LW
FOREWORD
This supplemental Manual has been prepared to provide Sharp Electronics Corp. Service Personnel with Operation and Service Information for the SHARP FREE STANDING RANGE WITH MICROWAVE
DRAWER, KB-3401LS/JK/JW.
PRODUCT DESCRIPTION
POWER CONNECTION
ANTI-TIP DEVICE
SCHEMATICS
KB-3401LS
KB-3401LK
KB-3401LW
Models KB-3401LS, KB-3401LK, and KB-3401LW are quite similar
to models KB-3300JS/JK/JW (S74R243KB330J).
It is recommended that service personnel carefully study the entire
text of this manual so that they will be qualified to render satisfactory
customer service.
Check the interlock switches and the door seal carefully. Special
attention should be given to avoid electrical shock and microwave
radiation hazard.
WARNING
Never operate the oven until the following points are ensured.
(A) The door is tightly closed.
(B) The door brackets and hinges are not defective.
(C) The door packing is not damaged.
(D) The door is not deformed or warped.
(E) There is not any other visible damage with the oven.
Servicing and repair work must be carried out only by trained service
personnel.
DANGER
Certain initial parts are intentionally not grounded and present
a risk of electrical shock only during servicing. Service
personnel - Do not contact the following parts while the appliance is energized;
High Voltage Capacitor, Power Transformer, Magnetron, High
Voltage Rectifier Assembly, High Voltage Harness;
If provided, Vent Hood, Fan assembly, Cooling Fan Motor.
TOUCH CONTROL PANEL
COMPONENT REPLACEMENT
AND ADJUSTMENT PROCEDURE
WIRING DIAGRAM
PARTS LIST
All the parts marked “*” on parts list are used at voltages more
than 250V.
Removal of the outer wrap gives access to voltage above 250V.
All the parts marked “ ” on parts list may cause undue microwave
∆
exposure, by themselves, or when they are damaged, loosened
or removed.
SHARP ELECTRONICS CORPORATION
SHARP PLAZA, MAHWAH,
NEW JERSEY 07430-2135
7
KB-3401LS
KB-3401LK
KB-3401LW
OVEN SPECIFICATION
ITEM DESCRIPTION
Power Requirements 120 /208 - 120/240Volts / 46/50 Amperes
60 Hertz
Single phase, 3 wire grounded
Thermal Oven Heating Elemants Top - 3000W Bottom - 3000W Rear - 2500W
Case Dimensions Width 29-7/8"
Height 36"
Depth 27-5/16
Cooking Cavity Dimensions Width 22-5/8"
Height 15-13/16"
3.6 Cubic Feet Depth 18"
Cook Top Heating Elements Two 6" - 1200W
One 8" - 2000W
One 6"/9" - 1200/2400W One 6" - 100W
Control Complement Glass Touch Control System
Clock ( 1:00 - 12:59 )
Timer (0 - 99 min. 99 seconds)
Bake pad, Broil pad, Self Clean pad, Timed Cook pad, Number selection pads,
Delay Start pad, Stop/Clear pad, Oven Light pad, Control Lock pad, Setup/Custom
Help, Cooktop warm, Set/off, On, Control lock/on off, Convection, Timer/Hold to Clear
and 3 min Plus.
Oven Cavity Light 40W x 1
Safety Standard UL Listed
Weight Approx. 260 lbs.
8
MICROWAVE DRAWER SPECIFICATION
ITEM DESCRIPTION
Power Output 1000 watts (IEC TEST PROCEDURE)
Operating frequency of 2450MHz
Cooking Cavity Dimensions Width 17-11/32
Height 5-7/8"
1.0 Cubic Feet Depth 17-1/8"
Control Complement Touch Control System
Clock ( 1:00 - 12:59 )
Timer (0 - 99 min. 99 seconds)
Microwave Power for Variable Cooking
Repetition Rate;
P-HI .................................................. Full power throughout the cooking time
P-90 ..................................................................... approx. 90% of Full Power
P-80 ..................................................................... approx. 80% of Full Power
P-70 ..................................................................... approx. 70% of Full Power
P-60 ..................................................................... approx. 60% of Full Power
P-50 ..................................................................... approx. 50% of Full Power
P-40 ..................................................................... approx. 40% of Full Power
P-30 .................................................................... approx. 30% of Full Power
P-20 ..................................................................... approx. 20% of Full Power
P-10 ..................................................................... approx. 10% of Full Power
P-0 ..................................................... No power throughout the cooking time
KB-3401LS
KB-3401LK
KB-3401LW
START/MINUTE PLUS pad, Defrost pad, Number selection pad, Micro-warm/
Power Level pad, Timer/Clock pad,Stop/Clear pad, Sensor Reheat, Sensor
Popcorn, Sensor Cook, Setup/Custom Help.
Oven Cavity Light Yes
Safety Standard UL Listed FCC Authorized
DHHS Rules, CFR, Title 21, Chapter 1, Subchapter J
9
KB-3401LS
208/240 VOLT CONNECTION INSTRUCTIONS
The range can besetfor 208V or240V. The voltagesettingfor your
range is pre-set at 240V from the factory. Follow these steps to
change the voltage setting.
1
Locate the voltage switch on the lower back side of the
range.
2
Removethe screwandrotatethe switchplate180 asindicated
in the Figure 3.
3
Reinsert the switch plate and replace screw as indicated
in Figure 4. The voltage setting is indicated by the visible
marking.
POWER CORD CONNECTIONS
4-WIRE CONNECTION INSTRUCTIONS-FIGURE 8
Beforewiringthe range,reviewthe suggestedpowersource location.
Ifconnectingtoa 4-wireelectricalsystemfora
new branch-
circuit or mobile home use a 4-wire connection.
1
Follow the power supply kit manufacturer s Installation
Instructions supplied with the strain relief clamp and install.
See Figure 7.
2
Insert the end connectors for line 1, line 2 and neutral and
tighten securely to the terminal block.
IMPORTANT
DO NOT LOOSEN the factory installednut
connections which secure the range wiring to the terminal
block. Electrical failure or loss of electrical connection may
occur if these 3 nuts are loosened or removed.
3
You must disconnect the ground strap. Remove the factory
installed ground screw and plate to releasethe copper ground
strap from the frame of the range. Cut and discard the copper
ground strap and plate. KEEP the ground screw.
4
Connectthe greengroundwireleadwiththeeyelettotheframe
of the range with the ground screw using the same hole in the
frame where the ground screw was originally installed. See
Figure 8.
5
Make sure all screws are tightened securely and replace the
rear access cover. See Figure 6.
3-WIRE CONNECTION I NSTRUCTIONS
For existing installations ONLY,referto Figure 9.
1
Follow the power supply kit manufacturer s Installation
Instructions supplied with the strain relief clamp and install.
See Figure 7.
2
Insert the end connectors for line 1, line 2 and neutral and
tighten securely to the terminal block. See Figure 7.
IMPORTANT
DO NOT LOOSEN the factory installednut
connections which secure the range wiring to the terminal
block. Electrical failure or loss of electrical connection may
occur if these 3 nuts are loosened or removed.
240V
180
screw
ACCESS TO TERMINAL BLOCK
Loosen screw on rear access cover and pull down as illustrated in
Figure6 toaccess terminal blockwiring connection.Toclose,return
to original location and secure screw.
Figure 6
Figure 3 Figure 4
208V
screw
3 & 4-WIRE ELECTRICAL WALL RECEPTACLE TYPES &
RECOMMENDED MOUNTING ORIENTATION ON WALL
Figure 5A illustrates 4-wire receptacle required for new and
remodeled installations.
Figure 5B illustrates 3-wire receptacle that is allowed for existing
installations.
Figure 5A
4-wire wall receptacle (14-50R)
Figure 5B
3-wire wall receptacle (10-50R)
strain-relief clamp
Figure 7
KB-3401LK
KB-3401LW
POWER CONNECTION
10
3
Make sure all connections are tightened securely and replace
the rear access cover. See Figure 7.
GROUNDING INSTRUCTION S- ONLY 3-WIRE CON NECTIONS:
A ground strap is installed on this rangewhich connects the center
terminal of the neutral terminal block to the range chassis. The
ground strap is connected to the range by the center, lowestscrew
SeeFigure9. Thegroundstrapmustnot beremovedunlessNational
State or Local Codes do not permit use of a ground strap.
Note: If the ground strap is removedforanyreason,a separate
ground wire must be connected to the separate ground screw
attached to the range chassisand to an adequate ground source
3 & 4 -WIRE PERMANENT WIRE CONNECTIONS
3–wire permanent connection – follow steps 1, 2 and 5 below.
4–wire permanent connection – followall steps below.
Beforewiringtherange,reviewthe suggestedpowersource location
drawings in Figure 2. If connecting to a 4-wire electrical system:
1
Follow the manufacturer s Installation Instructions supplied
with the strain relief clamp and install.
2
Strip insulation away from the ends of the permanent wiring
for line 1, line 2 and neutral; also strip ground wire on 4-wire
G
r
o
u
n
d
s
t
r
a
p
t
e
r
m
i
n
a
l
b
l
o
c
k
Note: Install strain-relief
clamp. Center orwhite
wire must alwaysbe
attached to thecenter
terminal on block.
Connect neutral (white
or center) here.
Connect line
1 here.
Connect
line 2
here.
A user suppliedstrain-relief
clamp must beinstalled at
this location. Itrequires
13/8-inches (3.5 cm)
diameter cord kithole.
Figure 9
t
e
rm
i
n
a
l
b
l
o
c
k
w
h
i
t
e
r
e
d
g
r
e
e
n
A user suppliedstrainrelief clamp mustbe
installed at thislocation.
It requires 13/8-inches
(3.5 cm) diametercord
kit hole.
Connect green insulated
copper ground wirewith
ground screw here.
Cut ground strap.
Discard ground strap&
ground plate.
Connect neutral (white
or center) here.
Connect line
1 here.
Connect
line 2
here.
b
l
a
c
k
Note: Install strain-relief
clamp. Center orwhite
wire must alwaysbe
attached to thecenter
terminal on block.
Figure 8
4-WIRE CONNECTION
3-WIRE CONNECTION
Figure 10
ground
screw
ground
wire lead
ground
plate
proper ground for
4-wire permanent
connection
Figure 11
4-WIRE PERMANENT CONNECTION ONLY
FOR 3 & 4 -WIRE PERMANENT CONNECTIONS
connections.Tightenall 3or 4-wireleadstotheterminalblock.
Followwire locations shown in Figure 10.
IMPORTANT
DO NOT LOOSEN the factory installed nut
connections which secure the range wiring to the terminal
block. Electrical failure or loss of electrical connection may
occur if these 3 nuts are loosened or removed.
Note: For3-wire permanentconnectionskip steps3and 4 and
continue with step 5.
3
Disconnect the ground strap. Remove the factory installed
ground screw and plate to release the factory installed copper
ground strap from frame of the range. Cut and discard the
copperstrapfromthe terminalblock. KEEPthegroundscrew,
ground plate and go to step 4.
4
Connect the green ground wire lead to the frame of the range
usingthegroundscrewand plateasshowninFigure11.Besure
to install using the same hole in the frame where the ground
screw was originally installed.
5
Make sure all connections are tightened securely and replace
the rear access cover. See Figure 7.
Note:Non-terminated fieldwire compressionconnectionsmust
be set at approximately 90 in./lbs.
terminal
block
ground
screw
ground plate
ground strap
line 2
neutral
line 1
KB-3401LS
KB-3401LK
KB-3401LW
11
KB-3401LS
2 DRILL PILOT HOLES AND FASTEN BRAC KET
Drill a1/8-inch pilot hole where screws are to be located. If bracket
is to be mounted to the wall, drill pilot hole at an approximate 20
degree downward angle. If bracket is to be mounted to masonry or
ceramic floors, drill a5/32-inch pilot hole 13/4-inches deep. The
screws provided may be used in wood or concrete material. Use a
5
/16-inch nut-driver or flat head screwdriver to secure the bracket
in place.
FASTEN BRACKET (WALL OR FLOOR MOUNTING)
FASTEN BRACKET (FLOOR MOUNTING ONLY)
Floor Mount
Floor Mount
Anti-Tip Bracket
Anti-Tip Bracket
Wall
Wall Mount
Wall Plate
More Than
11/4"
Max 11/4"
Leveling Leg
Leveling Leg
3 LEVEL AND POSITION RANGE
Level range by adjusting the (4) leveling legs with a wrench. Note:
A minimum clearance of1/8-inch is required between the bottom
of the range and the leveling leg to allow room for the bracket. Use
a level tocheck youradjustments. Plugrange into properlyprepared
electrical receptacle or if hard wired, check that it was completed
properly. Check door condition for evenness and stability. Slide
range back into position.
Visuallycheckthat rearlevelinglegis insertedinto andfully secured
by the Anti-Tip bracket by looking underneath the range with a
flashlight and carefully attempt to tilt it forward.
ANTI-TIP DEVICE
NORMAL INSTALLATION STEPS
ANTI-TIP BR ACKET INSTALLATION INSTRUCTIONS
IMPO RTANT SAFETY WARNING
To reduce theriskof tipping ofthe range, therangemust be secured
to thefloorbyproperly installed Anti-Tip bracketand screwspacked
with the range. Failure to install the Anti-Tipbracket will allow the
range to tip over if excessive weight is placed on an open door or if
a child climbs upon it. Serious injury might result from spilled hot
liquids or from the range itself.
If range is ever moved to a different location, the Anti-Tip bracket
must also be moved and installed with the range. Instructions are
providedfor installation in woodorcementfastenedtoeitherthe floor
orwall. Wheninstalled tothe wall, makesure thatscrewscompletely
penetratedrywall andare securedin woodormetal. Whenfastening
to the floor or wall, be sure that screws do not penetrate electrical
wiring or plumbing.
1 LOCATE THE BR ACKET - USING THE TEMPLATE
The bracket may be located on either the left or right side of the
range. Use the information below to locate the bracket if template
is not available.
Mark the floor or wall where left or right side of the range will be
located. If rear of range is against the wall or no further than 11/4inchesfrom wallwheninstalled,youmay use thewall orfloormount
method. If molding is installed and does not allow the bracket to fit
push against thewall, removemolding or mount bracketto thefloor.
For wall mount, locate the bracket by placing the back edge of the
template against the rear wall and the side edge of template on the
mark made referencing the side of the range. Place bracket on top
of template and mark location of the screw holes in wall. If rear of
rangeis furtherthan 11/4-inchesfrom thewallwhen installed,attach
bracket to the floor. For floor mount, locate the bracket by placing
backedge ofthe templatewherethe rear ofthe rangewill belocated.
Mark the location of the screw holes, shown in template.
Figure 18
Figure 15
Figure 16
Figure 17
Range Slide
15/8" to edge
of bracket
KB-3401LK
KB-3401LW
12
HI HI
LO
MED MED
LO
SMALL LARGE
OFF
Cooktop
HILO
MED
OFF
HILO
MED
OFF
HILO
MED
OFF
Cooktop
GLASS CERAMIC COOKTOP
KEY GLASS
MICROWAVE
CONTROL KNOBS
CONTROL KNOBS
CONTROL PANEL
HOT SURFACE INDICATOR LIGHTS
RADIANT
SURFACE UNIT
WARM ZONE
RADIANT
SURFACE UNIT
RADIANT
SURFACE UNIT
RADIANT
SURFACE UNIT
OVEN
KB-3401LS
KB-3401LK
KB-3401LW
KB-3401LS
13
KB-3401LS
COOK TOP
NOTES:
1. Circuits / wire colors are subject to change without notice.
2. Terminal that is located on the right side on lamp sockets back view
must be connected to neutral wire.
SM
OL
FM
B1
B3
RY1
RY2
RY5
HUMIDITY
SENSOR
NOISE SUPR
ESSIONCOIL
R
ESI
STOR 470 kohm 1/2W
LINECROSSCAPACITOR 1.0uF250V
LINE BYPASSCAPACITOR
0.0033uF 250V
LINE BYPASSCAPACIT
OR
0.0033uF 250V
F
USE
20A
FAN MOTOR
F
M
C
LOSSFLOW
FANMOTOR
OVEN LAMP
O
L
OVENLAMP
CONV. HEATER
TOP HEATER
MONITOR SWITCH
PRIMARY INT
ER
L
OCK
RELAY
RECTIFIER MAGNETRON
POWER TRANSFORMER
CAPACITOR
1.00uF
AC 2300V
STIRRER MOTOR
L
M
D
OORLOCK
M
OTO
R
L
L
N.O
.
N.O.
N.O.
COM
.
COM.
COM.
N.O.
COM.
C1
RY7
RY4
RY10
RY3
RY8
CONTROL UNIT
M
12
D
OOR
L
OC
K
M
OTO
R
SWITC
H
T
HER
M
I
ST
OR
M
1
1
M
10
M
9
M
8
M
4
DO
OR
SWITC
H
M
5
CONTROL UNIT
OVEN
MICROWAVE DRAWER
L1
L2
N
N
L1
L2
2
INSIDE
OUTSIDE
CONTROL
RIGHT FRONT
SURFACE
ELEMENT
44aS2S1
P2
P1
H2 /
2
2a
1a
2
P1 /
4
CONTROL
H1 /
4
P
L1 /
P2
L2 /
P1
H2 /
2
PROTECTOR
CONTROL
INDICATOR LIGHT
INDICATOR LIGHT
HOT SURFACE LIGHT
HOT SURFACE
LIGHT
SWITCHES
H1 /
4
P
L1 /
P2
L2 /
P1
H2 /
2
CONTROL
LEFT REAR
SURFACE
ELEMENT
H1 /
4
P
L1 /
P2
L2 /
P1
1b /
H
RR
LR
RF
LF
2b /
S
1b /
H
2b /
S
1b /
H
2b /
S
1b /
H
2b /
S
OVEN
THERMAL
CUT-OUT
MG
THERMAL
CUT-OUT
C
M
RY9
C
ONV. MOTOR
D1
D5
D3
C3 C7
C5
E6 E5
E3
RY6
SECONDARY INTELOCK SWITCH
VOLTAGE SWITCH
BOTTOM HEATER
OVEN THERMAL
CUT-OUT (THERMALOVEN)
A2
A4
A6
A1
M1
DOOR
SENSING
SWITCH
M3
F3
F2
F1
2a
2a
2a
1a
2
P1 /
4
PROTECTOR
LEFT FRONT
SURFACE
ELEMENT
1a
2
P1 /
4
PROTECTOR
RIGHT REAR
SURFACE
ELEMENT
1a
PROTECTOR
PROTECTOR
RY-BRY-C
WARMER
SURFACE
ELEMENT
L2
L1
LOW VOLTAGE
TRANSFORMER
BLK
YLW
BLK
YLW
BLK
ORG
RED
YLW
RED
RED
BLK
WHT
WHT
RED
BRN
RED
YLW
RED
RED
YLW
ORG
YLW
YLW
WHT
YLW
RED
YLW
RED
RED
RED
BLK
BLK
BLK
RED
RED
RED
YLW
YLW
YLW
YLW
YLW
WHT
YLW
BLU
BLK
YLW
YLW
YLW
YLW
BRN
YLW
WHT
RED
BRN
BLU
BLK
YLW
WHT
WHT
BLK
BLK
BLU
BLU
BLU
BLK
BLU
BLK
BLK
YLW
RED
WHT
YLW
RED
BLK
YLW
YLW
YLW
WHT
BLK
RED
RED
BLK
RED
YLW
RED
BLK
ORG
ORG
BRN
BRN
BLK
WHT
WHT
YLW
WHT
WHT
ORG
RED
BLU
WHT
YLW
WHT
BRN
RED
BLK
GRY
BLK
WHT
WHT
BLU
BLK
RED RED
BLK
RED
WHT
WHT
BLK
BLK
BLK
BLK
BLK
YLW
BLU
WHT
WHT
ORG
ORG
RED
RED
RED
RED
BRN
RED
RED
WHT
GRN
BLK
RED
BLK
BRNBLK
BLK
RED
BLK
BLK
WHT
WHT
ORG
ORG
RED
WHT
BRN
BRN
ORG
WHT
WHT
ORG
RED
RED
BRN
WHT
WHT
WHT
BLK
RED
ORG
P1B /
4
P1A /
4A
2a
1a
2
3
WHT
KB-3401LK
KB-3401LW
Schematic-Off Condition
14
COOK TOP SCHEMATIC (DETAIL)
L2
N
N
L1
L2
2
INSIDE
OUTSIDE
CONTROL
RIGHT FRONT
SURFACE
ELEMENT
4
4a
S2S1
P2
P1
H2 /
2
2a
1a
2
P1 /
4
CONTROL
H1 /
4
P
L1 /
P2
L2 /
P1
H2 /
2
PROTECTOR
CONTROL
INDICATOR LIGHT
INDICATOR LIGHT
HOT SURFACE LIGHT
HOT SURFACE
LIGHT
SWITCHES
H1 /
4
P
L1 /
P2
L2 /
P1
H2 /
2
CONTROL
LEFT REAR
SURFACE
ELEMENT
H1 /
4
P
L1 /
P2
L2 /
P1
1b /
H
RR
LR
RF
LF
2b /
S
1b /
H
2b /
S
1b /
H
2b /
S
1b /
H
2b /
S
2a
2a
2a
1a
2
P1 /
4
PROTECTOR
LEFT FRONT
SURFACE
ELEMENT
1a
2
P1 /
4
PROTECTOR
RIGHT REAR
SURFACE
ELEMENT
1a
PROTECTOR
PROTECTOR
WARMER
SURFACE
ELEMENT
L2
BLK
YLW
BLK
YLW
BLK
ORG
RED
YLW
RED
RED
BLK
WHT
WHT
RED
BRN
RED
YLW
RED
RED
YLW
ORG
YLW
YLW
WHT
YLW
RED
YLW
RED
RED
RED
BLK
BLK
BLK
RED
RED
RED
YLW
YLW
YLW
YLW
YLW
WHT
YLW
BLU
BLK
YLW
YLW
YLW
YLW
BRN
YLW
WHT
RED
BRN
BLU
BLK
YLW
WHT
WHT
BLK
BLK
BLU
BLU
BLU
BLK
BLU
BLK
BLK
YLW
RED
WHT
YLW
RED
BLK
YLW
YLW
YLW
WHT
BRN
WHT
WHT
P1B /
4
P1A /
4A
2a
1a
2
3
WHT
KB-3401LS
KB-3401LK
KB-3401LW
15
KB-3401LS
SM
OL
FM
B1
B3
RY1
RY2
RY5
HUMIDITY
SENSOR
NOISE SUPRESSION COIL
RESISTOR 470 kohm1/2W
LINE CROSS CAPACITOR1.0uF 250V
LINE BYPASSCAPACITO
R
0.0033uF 250V
LINEBYPASSCAPACITO
R
0.0033uF 250V
FUSE
20A
FAN MOTOR
OVEN LAMP
MONITOR SWITCH
PRIMARY INTERLOCK
RELAY
RECTIFIER MAGNETRON
POWER TRANSFORMER
CAPACITOR
1.00uF
AC 2300V
STIRRER MOTOR
L
L
N.O.
COM.
N.O.
COM.
C1
CONTROL UNIT
OVEN
THERMAL
CUT-OUT
MG
THERMAL
CUT-OUT
SECONDARY INTELOCK SWITCH
VOLTAGE SWITCH
A2
A4
A6
A1
M1
DOOR
SENSING
SWITCH
M3
F
3
F2
F1
L2
L1
LOW VOLTAGE
TRANSFORMER
BLK
YLW
BLU
WHT
WHT
ORG
ORG
RED
RED
RED
RED
BRN
RED
RED
WHT
GRN
BLK
RED
BLK
BRNBLK
BLK
RED
BLK
BLK
WHT
WHT
ORG
ORG
RED
WHT
BRN
BRN
ORG
WHT
WHT
ORG
RED
RED
WHT
KB-3401LK
KB-3401LW
MICROWAVE DRAWER SCHEMATIC (DETAIL)
16
KB-3401LS
FM
CLOSS FLOW
FAN MOTOR
OL
O
VEN LAMP
CONV. HEATER
TOP HEATER
LM
DOOR LOCK
MOTOR
N.O.
N.O.
COM.
COM.
RY7
RY4
RY10
RY3
RY8
M12
DOO
R LOC
K
MOTOR
SWITC
H
THERMISTOR
M11
M10
M9
M8
M
4
DOO
R
SWITC
H
M5
CONTROL UNIT
L1
L2
N
CM
RY9
CONV. MOTOR
D1
D5
D3
C3 C7
C5
E6 E5
E3
RY6
BOTTOM HEATER
RY-BRY-C
RED
RED
BLK
RED
RED
BLK
RED
YLW
RED
BLK
ORG
ORG
BRN
BRN
BLK
WHT
WHT
YLW
WHT
WHT
ORG
RED
BLU
WHT
YLW
WHT
BRN
RED
BLK
GRY
BLK
WHT
WHT
BLU
BLK
BLK
RED
WHT
WHT
BLK
BLK
BLK
BLK
WHT
BLK
RED
ORG
KB-3401LK
RANGE SCHEMATIC (DETAIL)
KB-3401LW
17
KB-3401LS
KB-3401LK
KB-3401LW
TOUCH CONTROL PANEL ASSEMBLY
OUTLINE OF TOUCH CONTROL PANEL
The touch control section consists of the following units.
(1) Keyboard unit
(2) Control Unit
(3) Power unit
The principal functions of these units and the signals communicated among them are explained below.
Keyboard unit
The keyboard unit is composed of a matrix, signals generated in the LSI are sent to the keyboard unit . When a key
pad is touched, a signal is completed through the keyboard
unit and passed back to the LSI to perform the function that
was requested.
Control Unit and Power Unit
Control unit consists of LSI, IC, reset circuit, indicator circuit,
power source circuit, relay circuit, buzzer circuit, synchronizing signal circuit, keyboard unit circuit, humidity sensor
circuit and back light circuit.
1) IC1 (LSI)
This is a microcomputer, responsible for controlling the
entire control unit.
2) IC2
This is the IC to drive the Liquid Crystal Display
(LCD1).
3) IC3
This is the IC to drive the Liquid Crystal Display
(LCD2).
4) IC4
This is the IC to judge the selected key.
5) IC5
This is the IC to amplify the signal from the humidity
sensor.
6) IC6
This is memory IC.
In addition, the synchronizing signal is available in order
to compose a basic standard time in the clock circuit.
Symbol Voltage Application
VC +5V LSI(IC1)
12) Relay Circuit
A circuit to drive the magnetron, fan motor, stirrer motor,
convection motor, door lock motor, bottom heater, top
heater, convection heater and light the oven lamp.
13) Buzzer Circuit
The buzzer is responsive to signals from the LSI to
emit audible sounds (key touch sound and completion
sound).
14) Synchronizing Signal Circuit
The power source synchronizing signal is available in
order to compose a basic standard time in the clock
circuit.
It accompanies a very small error because it works on
commercial frequency.
15) Door Sensing Switch (Microwave drawer)
A switch to “tell” the LSI if the drawer is open or
closed.
16) Door Switch (Oven)
A switch to “tell” the LSI if the oven door is open or
closed.
17) Door Lock Monitor Switch (Oven)
A switch to “tell” the LSI if the oven door is locked or
not.
18) Door Position Switch Front / Rear
The switch to “tell” the position of the Microwave drawer
door.
19) Back Light Circuit
A circuit to drive the back light (Light emitting diodes
LD1- LD6).
7) IC7
This is the IC to drive the relays.
8) IC8
This is the IC to drive the relays.
9) Reset Circuit
This circuit generates a signal which resets the LSI (IC1)
to the initial state when power is supplied.
10) Indicator Circuit
A circuit to drive the Liquid Crystal Displays (LCD1,
LCD2).
11) Power Source Circuit
This circuit generates voltages necessary in the control
unit from the AC line voltage.
20) Cook Top Warmer Indicator Circuit
A circuit to drive the indicator (LD10) for Cook Top
Warmer.
21) Humidity Sensor Circuit
This circuit detects moisture of the cooking food to allow
its automatic cooking.
22) Te m p e rature M easurem e n t C i rcuit : ( OV E N
THERMISTOR)
The temperature in the oven cavity is sensed by the
thermistor. The variation of resistance according to
sensed temperature is detected by the temperature
measurement circuit and the result applied to LSI. The
LSI uses this information to control the relay and display
units.
18
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