Sharp KB-3300JW Service manual

KB-3425LS/K/W
KB-4425LS/K/W
SERVICE MANUAL
S66R264KB442L
FREE STANDING/SLIDE-IN RANGE
WITH MICROWAVE DRAWER
MODELS
KB-4425LW pictured
KB-3425LS KB-4425LS
KB-3425LK KB-4425LK
KB-3425LW KB-4425LW
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
TEST PROCEDURES........................................................................................................................................... 18
TOUCH CONTROL PANEL ASSEMBLY............................................................................................................... 29
OVEN/MICROWAVE DRAWER DISASSEMBLY................................................................................................... 40
WIRING DIAGRAMS............................................................................................................................................. 52
PRINTED WIRING BOARDS................................................................................................................................ 58
PARTS LIST.......................................................................................................................................................... 63
PACKING AND ACCESSORIES........................................................................................................................... 74
SHARP ELECTRONICS CORPORATION
This document has been published to be used for after sales service only. The contents are subject to change without notice.
KB-3425LS/K/W
KB-4425LS/K/W
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 compartments, check the magnetron, wave guide or transmission line, and cavity for proper alignment, integrity, and
connections.
(d) Any defective or misadjusted components in the interlock, monitor, door seal, and microwave 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.
KB-3425LS/K/W
KB-4425LS/K/W
WARNING TO SERVICE PERSONNEL
Range units contain circuitry capable of producing very high voltage and current, contact
with following parts may result in a severe, possibly fatal, electrical shock.
(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 remove cabinet.
2. Open the drawer and keep it open.
3. Discharge high voltage capacitor.
, and then
WARNING: RISK OF ELECTRIC SHOCK.
DISCHARGE THE HIGH-VOLTAGE
CAPACITOR BEFORESERVICING.
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.
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.
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.
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.
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.
KB-3425LS/K/W
KB-4425LS/K/W
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 REPLACEMENT PARTS CATALOGED FOR THIS APPLIANCE.
SUBSTITUTIONS MAY DEFEAT COMPLIANCE WITH SAFETY
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
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.
KB-3425LS/K/W
KB-4425LS/K/W
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±5O C (68OF) in the center of the oven cavity.
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.
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.
KB-3425LS/K/W
KB-4425LS/K/W
NOTES
KB-3425LS/K/W
KB-4425LS/K/W
SERVICE MANUAL
FREE STANDING /SLIDE-IN RANGE
PRODUCT DESCRIPTION
WITH MICROWAVE DRAWER
KB-3425LS / KB-3425LK / KB-3425LW
KB-4425LS / KB-4425LK / KB-4425LW
POWER CONNECTION
ANTI-TIP DEVICE
FOREWORD
This Manual has been prepared to provide Sharp Electronics Corp.
Service Personnel with Operation and Service Information for the
SHARP FREE STANDING and SLIDE-IN RANGE WITH MICROWAVE
DRAWER, KB-3425LS/JK/JW and KB-4425LS/JK/JW
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.
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
SCHEMATICS
TEST PROCEDURE
TOUCH CONTROL PANEL
COMPONENT REPLACEMENT
AND ADJUSTMENT PROCEDURE
WIRING DIAGRAM
PARTS LIST
KB-3425LS/K/W
KB-4425LS/K/W
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 27-7/8
Cooking Cavity Dimensions Width 22-5/8"
Height15-13/16"
3.6 Cubic Feet
Depth18"
Cook Top Heating Elements
Two 6" - 1200W
One 8" - 2000W
One 6"/9" - 1200/2400W One 6" - 100W
Control Complement Touch Navigation System
Clock ( 1:00 - 12:59 )
Timer (0 - 99 min. 99 seconds)
Kitchen Timer, Cooktop Warm, Stop/Clear, Oven Light, Start, LOWER OVEN
Oven Cavity Light
Safety Standard
Weight
40W x 1
UL Listed
Approx. 260 lbs.
KB-3425LS/K/W
KB-4425LS/K/W
MICROWAVE DRAWER SPECIFICATION
ITEM
DESCRIPTION
Power Output 1000 watts (IEC TEST PROCEDURE)
Operating frequency of 2450MHz
Cooking Cavity Dimensions 1.0 Cubic Feet
Control Complement Width 17-11/32
Height 5-7/8"
Depth17-1/8"
Touch Navigation 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
Kitchen Timer, Cooktop Warm, Stop/Clear, Oven Light, Start, LOWER OVEN, Start/
Minute Plus, UPPER MICROWAVE OVEN, OPEN, CLOSE.
Oven Cavity Light
Safety Standard
Yes
UL Listed
FCC Authorized
DHHS Rules, CFR, Title 21, Chapter 1, Subchapter J
KB-3425LS/K/W
KB-4425LS/K/W
POWER CONNECTION
208/240 VOLT CONNECTION INSTRUCTIONS
ACCESS TO TERMINAL BLOCK
The range can be set for 208V or 240V. The voltage setting for your
range is pre-set at 240V from the factory. Follow these steps to
change the voltage setting.
Loosen screw on rear access cover and pull down as illustrated in
Figure 6 to access terminal block wiring connection. To close, return
to original location and secure screw.
1 Locate the voltage switch on the lower back side of the
range.
strain-relief clamp
2 Remove the screw and rotate the switch plate 180 as indicated
in the Figure 3.
180
208V
240V
3 Reinsert the switch plate and replace screw as indicated
in Figure 4. The voltage setting is indicated by the visible
marking.
screw
screw
Figure 6
Figure 7
POWER CORD CONNECTIONS
4-WIRE CONNECTION INSTRUCTIONS-FIGURE 8
Figure 3
Before wiring the range, review the suggested power source location.
If connecting to a 4-wire electrical system for a new branchcircuit or mobile home use a 4-wire connection.
Figure 4
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.
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 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.
3 You must disconnect the ground strap. Remove the factory
installed ground screw and plate to release the copper ground
strap from the frame of the range. Cut and discard the copper
ground strap and plate. KEEP the ground screw.
4-wire wall receptacle (14-50R)
3-wire wall receptacle (10-50R)
Figure 5A
Figure 5B
4 Connect the green ground wire lead with the eyelet to the frame
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 INSTRUCTIONS
For existing installations ONLY, refer to 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 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.
10
KB-3425LS/K/W
KB-4425LS/K/W
3 Make sure all connections are tightened securely and replace
the rear access cover. See Figure 7.
connections. Tighten all 3 or 4-wire leads to the terminal block.
Follow wire 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.
GROUNDING INSTRUCTIONS- ONLY 3-WIRE CONNECTIONS:
A ground strap is installed on this range which connects the center
terminal of the neutral terminal block to the range chassis. The
ground strap is connected to the range by the center, lowest screw
See Figure 9. The ground strap must not be removed unless National
State or Local Codes do not permit use of a ground strap.
Note: For 3-wire permanent connection skip steps 3 and 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
copper strap from the terminal block. KEEP the ground screw,
ground plate and go to step 4.
Note: If the ground strap is removed for any reason, a separate
ground wire must be connected to the separate ground screw
attached to the range chassis and 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 – follow all steps below.
Before wiring the range, review the suggested power source location
drawings in Figure 2. If connecting to a 4-wire electrical system:
4 Connect the green ground wire lead to the frame of the range
using the ground screw and plate as shown in Figure 11. Be sure
to install using the same hole in the frame where the ground
screw was originally installed.
1 Follow the manufacturer s Installation Instructions supplied
with the strain relief clamp and install.
5 Make sure all connections are tightened securely and replace
the rear access cover. See Figure 7.
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
Note: Non-terminated field wire compression connections must
be set at approximately 90 in./lbs.
4-WIRE CONNECTION
FOR 3 & 4-WIRE PERMANENT CONNECTIONS
terminal block
Connect
line 2
here.
terminal
block
neutral
A user supplied strainrelief clamp must be
installed at this location.
It requires 1 3/8-inches
(3.5 cm) diameter cord
kit hole.
c
k
gr e
en
Connect green insulated
copper ground wire with
ground screw here.
line 2
line 1
Connect neutral (white
or center) here.
red
bla
ite
wh
Connect line
1 here.
Cut ground strap.
Discard ground strap &
ground plate.
Note: Install strain-relief
clamp. Center or white
wire must always be
attached to the center
terminal on block.
ground strap
ground plate
ground
screw
Figure 10
Figure 8
3-WIRE CONNECTION
4-WIRE PERMANENT CONNECTION ONLY
ground
plate
proper ground for
4-wire permanent
connection
terminal block
Connect line
1 here.
Ground strap
Note: Install strain-relief
clamp. Center or white
wire must always be
attached to the center
terminal on block.
ground
screw
Connect
line 2
here.
ground
wire lead
Connect neutral (white
or center) here.
A user supplied strain-relief
clamp must be installed at
this location. It requires
1 3/8-inches (3.5 cm)
diameter cord kit hole.
Figure 11
Figure 9
11
KB-3425LS/K/W
KB-4425LS/K/W
2 DRILL PILOT HOLES AND FASTEN BRACKET
ANTI-TIP DEVICE
Drill a 1/8-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 a 5/32-inch pilot hole 1 3/4-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.
NORMAL INSTALLATION STEPS
ANTI-TIP BRACKET INSTALLATION INSTRUCTIONS
IMPORTANT SAFETY WARNING
To reduce the risk of tipping of the range, the range must be secured
to the floor by properly installed Anti-Tip bracket and screws packed
with the range. Failure to install the Anti-Tip bracket 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.
FASTEN BRACKET
(WALL OR FLOOR MOUNTING)
Max 1 1/4"
Leveling Leg
Wall Mount
If range is ever moved to a different location, the Anti-Tip bracket
must also be moved and installed with the range. Instructions are
provided for installation in wood or cement fastened to either the floor
or wall. When installed to the wall, make sure that screws completely
penetrate dry wall and are secured in wood or metal. When fastening
to the floor or wall, be sure that screws do not penetrate electrical
wiring or plumbing.
Wall Plate
Floor Mount
Anti-Tip Bracket
Figure 16
FASTEN BRACKET
1 LOCATE THE BRACKET - USING THE TEMPLATE
(FLOOR MOUNTING ONLY)
More Than
1 1/4"
Leveling Leg
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.
Wall
Floor Mount
Anti-Tip Bracket
Figure 17
3 LEVEL AND POSITION RANGE
Level range by adjusting the (4) leveling legs with a wrench. Note:
A minimum clearance of 1/8-inch is required between the bottom
of the range and the leveling leg to allow room for the bracket. Use
a level to check your adjustments. Plug range into properly prepared
electrical receptacle or if hard wired, check that it was completed
properly. Check door condition for evenness and stability. Slide
range back into position.
Visually check that rear leveling leg is inserted into and fully secured
by the Anti-Tip bracket by looking underneath the range with a
flashlight and carefully attempt to tilt it forward.
Figure 15
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 1 1/4 inches from wall when installed, you may use the wall or floor mount
method. If molding is installed and does not allow the bracket to fit
push against the wall, remove molding or mount bracket to the floor.
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
range is further than 1 1/4-inches from the wall when installed, attach
bracket to the floor. For floor mount, locate the bracket by placing
back edge of the template where the rear of the range will be located.
Mark the location of the screw holes, shown in template.
1 5/8" to edge
of bracket
Range Slide
Figure 18
KB-3425L Shown
12
KB-3425LS/K/W
KB-4425LS/K/W
KB-3425LS
13
Schematic-Off Condition
KB-3425LS/K/W
KB-4425LS/K/W
N
L1
CONTROL
S1
S2
YLW
4
4a
P1B /
4
YLW
RED RED
YLW
RIGHT FRONT
SURFACE
ELEMENT
INSIDE
OUTSIDE
WHT P1A /
4A
1a
BRN
2a
2
INDICATOR LIGHT
PROTECTOR
2a
RED
RED
RED
P1
RED
WHT
L2 /
P1
RED
YLW
RED
RED
L2
RED
BLK
L2
N
L1
RED
L
BLK
RED
WHT
BLK
WHT
1
3
M5
CONTROL UNIT
C3
OVEN
SWITCHING POWER SUPPLY UNIT
RED
3
1
D1
ORG
RED
C7
E2
E1
ORG
MG
THERMAL
CUT-OUT
BLK
RED
MICROWAVE DRAWER
DOOR OPEN-CLOSE
MOTOR
RED
OVEN
THERMAL
CUT-OUT
C5
DM
D3
D5
E6 E3
RY-C
ORG
E5
RY-B
DOOR
POSITION
SWITCH
FRONT
COM.
RED
RED
DOOR
POSITION
SWITCH
REAR
A4
A1 A2
LOW VOLTAGE
TRANSFORMER
A6
CAPACITOR
1.00uF
AC 2300V
RED
L2 /
P1 RED
RED
L2
CONTROL UNIT
N.O.
BRN
YLW
YLW
P
PROTECTOR
INDICATOR LIGHT
H2 /
2
WHT
L2 /
P1
WHT
RED
RED
RED
RED
ORG
BLK P2
L1 /
P2
WHT
2
1a
H2 /
P1 /
4
2
YLW 2
1a
2a
RIGHT REAR
PROTECTOR
SURFACE
ELEMENT
P1 /
4
WARMER
SURFACE
ELEMENT
2
H2 /
2
BRN
RY10
C1
RED
B1
B3
RED
YLW
WHT
YLW
P1 /
4
1a
2a
LEFT FRONT
SURFACE PROTECTOR
ELEMENT
LEFT REAR
SURFACE
ELEMENT
P1 /
4
2
1a
2a
PROTECTOR
HOT SURFACE LIGHT
RR
RF
RED
N.O.
YLW
RY4
COM.
BLU
H1 /
4 WHT
P YLW
BLK
YLW
WHT
YLW
BRN
LR
LF
RED
VOLTAGE SWITCH
BRN
14
CONTROL
L1 /
P2
H1 /
4
BLK
P
CONTROL
L1 /
P2
H1 /
4
WHT
1b /
H
CONTROL
2b /
S
1b /
H
BRN
YLW
2b /
S
BLU
BLK
YLW
BRN
BRN
OVEN THERMAL
CUT-OUT (THERMAL OVEN)
WHT
ORG
BLK
ORG
BLK
BLK
BLK
BLU
1b /
H
YLW
BLK
YLW
BLU
YLW
2b /
S
1b /
H YLW
BLK
POWER TRANSFORMER
WHT
BLK
TOP HEATER
BLK
BLK
RY7
RED
BLK
M12 RY6
ORG
BLK
BLK N.O.
BLK
RY8
CONV. MOTOR
SECONDARY INTELOCK SWITCH
BLK
MAGNETRON
RECTIFIER
BLK
RED
COM.
BLU
RED
BLK
M14
M10
YLW
RY3
WHT
BRN
BOTTOM HEATER
M13
RED
MONITOR SWITCH
M7
BLU
WHT
OL
WHT
RED
BRN
CONV. HEATER
BLK
BLK
BLK
GRY
M6
GRY
RED
N.O.
OVEN LAMP
WHT
PRIMARY INTERLOCK
RELAY
RY2
STIRRER MOTOR
YLW
ORG
WHT
ORG
OL
WHT
WHT
WHT
WHT
BLU
ORG
RED
WHT
YLW
N4
RY1
FAN MOTOR
ORG
N3
OVEN LAMP
BLK
N2
RY5
F1
BRN
LM
WHT
F3
M11
THERMISTOR
MICROWAVE DRAWER
WHT M1
WHT
COM.
F2
BLK
DOOR
SENSING
SWITCH
RED
N1
CM
M3
RY9
CLOSS FLOW
FAN MOTOR
YLW
YLW
2b /
S
NOISE SUPRESSION COIL
RED
GRN
N5
ORG
ORG
SM
WHT
BLK
BLU
BLK
BLU
BLU
L
LINE CROSS CAPACITOR 1.0uF 250V
FM
WHT
WHT
BRN
DOOR LOCK
MOTOR
SWITCH
M9
RED
RED
M4
BLK
DOOR
SWITCH
M8
LINE BYPASS CAPACITOR
0.0033uF 250V
LINE BYPASS CAPACITOR
0.0033uF 250V
RY11
BLK
FM
BLK
BLK
BLK
L1
FUSE
20A
BLK
HOT SURFACE
LIGHT
SWITCHES
RESISTOR 470 kohm 1/2W
DOOR LOCK
MOTOR
HUMIDITY
SENSOR
YLW
YLW
YLW
YLW
YLW
YLW
YLW
BLK
BLK
BLK
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.
WHT
WHT
COOK TOP
WHT
COOK TOP SCHEMATIC (DETAIL)
RED
RED
RED
RED
RED
BLK
BLK
BLK
BLK
CONTROL
S1
S2
YLW
INDICATOR LIGHT
YLW
YLW
YLW
RED RED
4
L1 /
P2
WHT P1A /
4A
RED
PROTECTOR
RED
WHT
RIGHT FRONT
SURFACE
ELEMENT
P
H1 /
4 WHT
P1 /
4
WHT
YLW
2
YLW
1a
2a
RIGHT REAR
PROTECTOR
SURFACE
ELEMENT
YLW
CONTROL
YLW
ORG
YLW
YLW
YLW
4a
INSIDE
OUTSIDE
RED
RED
P1
2
BRN
2a
1a
P1B /
4
BLK P2
L2
RED
L2
L1
KB-3425LS/K/W
KB-4425LS/K/W
H2 /
2
L2 /
P1
RED
COOK TOP
N
P1 /
4
WHT
2
WARMER
SURFACE
ELEMENT
BLK
L1 /
P2
P YLW
1a
YLW
2a
PROTECTOR
INDICATOR LIGHT
YLW
RED
ORG
BLK
BLK
YLW
L1 /
P2
YLW
YLW
BLK
CONTROL
P
H1 /
4
WHT
H2 /
2
2
1a
2a
LEFT FRONT
SURFACE PROTECTOR
ELEMENT
LEFT REAR
SURFACE
ELEMENT
P1 /
4
2
YLW
YLW
CONTROL
WHT
P1 /
4
RED
WHT
L2
H2 /
2
1a
2a
PROTECTOR
L2 /
P1
RED
BRN
HOT SURFACE LIGHT
BLK
BLU
BLK
BLU
BLK
BLU
BLU
2b /
S
1b /
H BRN
2b /
S
1b /
H BLU
2b /
S
1b /
H BLK
2b /
S
1b /
H YLW
RR
YLW
BRN
YLW
BLU
YLW
BLK
YLW
YLW
RF
LR
LF
HOT SURFACE
LIGHT
SWITCHES
N
L2 /
P1 RED
WHT
WHT
15
WHT
BLK
YLW
WHT
H1 /
4
KB-3425LS/K/W
KB-4425LS/K/W
MICROWAVE DRAWER SCHEMATIC (DETAIL)
L2
WHT
N
BLK
L1
BLK
RED
L
L
RED
WHT
SWITCHING POWER SUPPLY UNIT
LINE CROSS CAPACITOR 1.0uF 250V
NOISE SUPRESSION COIL
LINE BYPASS CAPACITOR
0.0033uF 250V
RED
WHT M1
BLK
RED
E1
E2
ORG
CONTROL UNIT
F2
MG
THERMAL
CUT-OUT
BLK
RED
BLK
COM.
N1
RED
F1
C1
FAN MOTOR
WHT
ORG
ORG
ORG
RED
WHT
ORG
RED
YLW
BLU
RED
BLK
BLK
A4
WHT
A1 A2
BLU
B
LOW VOLTAGE
TRANSFORMER
A6
POWER TRANSFORMER
BLK
RY-B
DOOR
POSITION
SWITCH
REAR
M14
M13
ORG
BLK
BRN
RED
RED
BRN
VOLTAGE SWITCH
GRY
M7
RED
MONITOR SWITCH
RED
ORG
M6
N.O.
BRN
BLK
DOOR
POSITION
SWITCH
FRONT
OVEN LAMP
N5
PRIMARY INTERLOCK
RELAY
COM.
OL
WHT
N3
N4
RY1
RY2
N2
RY-C
STIRRER MOTOR
N.O.
SM
RY11
BLK
FM
WHT
RY5
RED
DM
BRN
BRN
SECONDARY INTELOCK SWITCH
F3
MICROWAVE DRAWER
DOOR OPEN-CLOSE
MOTOR
ORG
M3
GRN
HUMIDITY
SENSOR
3
1
OVEN
THERMAL
CUT-OUT
DOOR
SENSING
SWITCH
WHT
MICROWAVE DRAWER
LINE BYPASS CAPACITOR
0.0033uF 250V
1
3
RESISTOR 470 kohm 1/2W
WHT
BLK
FUSE
20A
YLW
CAPACITOR
1.00uF
AC 2300V
WHT
16
B3
MAGNETRON
B1
RECTIFIER
RED
KB-3425LS/K/W
KB-4425LS/K/W
RANGE SCHEMATIC (DETAIL)
N
BLK
RED
WHT
BLK
DOOR
SWITCH
RED
M4
M5
RED
M9
YLW
M10
BRN
M8
ORG
M12 RY6
ORG
YLW
C3
FM
CLOSS FLOW
FAN MOTOR
RY9
BLK
RED
D1
CM
RED
OVEN
M11
THERMISTOR
WHT
WHT
CONTROL UNIT
DOOR LOCK
MOTOR
SWITCH
BLU
CONV. MOTOR
BRN
LM
RED
WHT
WHT
RY8
C7
DOOR LOCK
MOTOR
RY7
WHT
WHT
ORG
OL
C5
OVEN LAMP
RY10
D3
YLW
RY-C
E6 E3
WHT
GRY
ORG
BLK
CONV. HEATER
D5
WHT
WHT
BLK
BLK
RY-B
E5
WHT
RED
RY3
BLU
BOTTOM HEATER
COM.
BLK
BLK N.O.
BLK
BLK
BLK
TOP HEATER
RED
COM.
RY4
N.O.
BRN
RED
L1
BLK
BLK
RED
OVEN THERMAL
CUT-OUT (THERMAL OVEN)
17
KB-3425LS/K/W
KB-4425LS/K/W
TEST PROCEDURES
PROCEDURE
LETTER
A
COMPONENT TEST
TOUCH CONTROL PANEL ASSEMBLY TEST
The touch control panel consists of circuits including semiconductors such as LSI, ICs, etc. Therefore,
unlike conventional microwave ovens, proper maintenance cannot be performed with only a voltmeter
and ohmmeter.
In this service manual, the touch control panel assembly is divided into three units, Control Unit and
Keyboard Unit and Power Unit, and troubleshooting by unit replacement is described according to the
symptoms indicated.
Before testing,
1) Disconnect the power supply cord, and then disassemble as per "OVEN/MICROWAVE DRAWER
DISASSEMBLY" page 40.
2) Open the drawer and block it open.
3) Discharge high voltage capacitor.
4) Disconnect the leads to the primary of the power transformer.
5) Ensure that these leads remain isolated from other components and oven chassis by using
insulation tape.
1. Keyboard Unit.
NOTE ;
1) Check Keyboard unit connection before replacement.
2) Reconnect all leads removed from components during testing.
3) Re-install the outer case (cabinet).
4) Reconnect the power supply cord after the outer case is installed.
5) Run the oven and check all functions.
The following symptoms indicate a defective keyboard unit.
a) When touching the pads, a certain pad produces no signal at all.
b) When touching a number pad, two figures or more are displayed.
c) When touching the pads, sometimes a pad produces no signal.
If the Keyboard unit is defective.
1) Disconnect the power supply cord, and then remove outer case.
2) Open the door and block it open.
3) Discharge high voltage capacitor.
4) Replace the Keyboard unit.
5) Reconnect all leads removed from components during testing.
6) Re-install the covers.
7) Reconnect the power supply cord after the outer case is installed.
8) Run the oven and check all functions.
2. Control Unit
The following symptoms indicate a defective control unit. Before replacing the control unit, perform
the Keyboard unit test (Procedure J) to determine if control unit is faulty.
2-1 In connection with indicators
a)At a certain digit, all or some segments do not light up.
b)At a certain digit, brightness is low.
c)Only one indicator does not light.
d)The corresponding segments of all digits do not light up; or they continue to light up.
e)Wrong figure appears.
f) A certain group of indicators do not light up.
g)The figure of all digits flicker.
2-2 Other possible problems caused by defective control unit.
a)Buzzer does not sound or continues to sound.
b)Clock does not operate properly.
c)Cooking is not possible.
3. Power Unit or Touch Control Transformer
a) Fan motor, stirrer motor, oven lamp or electrical parts do not turn on or do not turn off.
b) Digital display on the control unit does not show anything.
When testing is completed,
1) Disconnect the power supply cord, and then disassemble as per "OVEN/MICROWAVE DRAWER
DISASSEMBLY" page 40.
2) Open the drawer and block it open.
3) Discharge high voltage capacitor.
18
TEST PROCEDURES
PROCEDURE
LETTER
KB-3425LS/K/W
KB-4425LS/K/W
COMPONENT TEST
4) Reconnect all leads removed from components during testing.
5) Re-install the covers.
6) Reconnect the power supply cord after the outer case is installed.
7) Run the oven and check all functions.
B
KEYBOARD UNIT TEST
1. Disconnect the power supply cord, and then disassemble as per "OVEN/MICROWAVE DRAWER
DISASSEMBLY" page 40.
2. Open the drawer and block it open.
3. Discharge high voltage capacitor.
4. If the display fails to clear when the STOP/CLEAR pad is depressed, first verify the wire harness
and connectors are making good contact between the control unit and the keyboard, verify that the
door sensing switch operates properly; that is the contacts are closed when the door is closed and
open when the door is open.
5. Remove the old keyboard unit and install the new keyboed unit (as the normal keyboard unit).
6. Reconnect the wire harness to the keyboard unit.
7. If the control unit responds by clearing with a beep when the stop/clear pad is touched, the old
keyboard unit is faulty and must be replaced. If the control unit does not respond, it is faulty and
must be replaced. If a specific pad does not respond, the above method may be used (after clearing
the control unit) to determine if the control unit or keyboed unit is at fault.
8. Reconnect all leads removed from components during testing.
9. Re-install the covers.
10. Reconnect the power supply cord after the outer case is installed.
11. Run the oven and check all functions.
C
RELAY TEST
1. Disconnect the power supply cord, and then disassemble as per "OVEN/MICROWAVE DRAWER
DISASSEMBLY" page 40.
2. Open the drawer and block it open.
3. Discharge high voltage capacitor.
4. Disconnect the leads to the primary of the power transformer.
5. Ensure that these leads remain isolated from other components and oven chassis by using insulation
tape.
6. After that procedure, re-connect the power supply cord.
7. Remove the covers and check voltage between Pin Nos. 1 and 3 of the 2 pin connector (CN-B) on
the power unit with an A.C. voltmeter.
The meter should indicate 116 or 120 volts, if not check oven circuit.
RY1 and RY2 Relay Test
These relays are operated by D.C. voltage
Check voltage at the relay coil with a D.C. voltmeter during the microwave cooking operation.
DC. voltage indicated - Defective relay.
DC. voltage not indicated - Check diode which is connected to the relay coil. If diode is good,
control unit is defective.
RELAY SYMBOL
RY1
RY2
RY3
RY4
RY5
RY6
RY7
RY8
RY9
RY10
RY11
RY-B
RY-C
OPERATIONAL VOLTAGE
Approx. 18V D.C.
Approx. 18V D.C.
Approx. 18V D.C.
Approx. 18V D.C.
Approx. 24V D.C.
Approx. 24V D.C.
Approx. 24V D.C.
Approx. 24V D.C.
Approx. 24V D.C.
Approx. 24V D.C.
Approx. 24V D.C.
Approx. 24V D.C.
Approx. 24V D.C.
19
CONNECTED COMPONENTS
Oven lamp / Stirrer motor
Power transformer
Oven common relay
Top heater
Fan motor (Microwave)
Fan motor (Oven)
Oven lamp (Oven)
Door lock motor (Oven)
Convection motor
Warmer (Cook top)
Switching power supply
Bottom heater
Convection heater
KB-3425LS/K/W
KB-4425LS/K/W
TEST PROCEDURES
PROCEDURE
LETTER
COMPONENT TEST
8.Reconnect all leads removed from components during testing.
9. Re-install the covers.
10.Reconnect the power supply cord after the cabinets are installed.
11.Run the drawer and check all function.
D
DEFROST TEST
WARNING : The unit should be fully assembled before following procedure.
(1) Place one cup of water in the center of the turntable tray in the oven cavity.
(2) Close the door, touch the Stop/Clear (M) pad and touch the Defrost pad on the LCD. Then touch
the Steaks/Chops pad on the LCD. And touch the number pad 5 on the LCD. (Now, weight 0.5lb is
set.) And then touch the start pad on the LCD.
(3) The oven is in Defrost cooking condition.
(4) The oven will operate as follows
WEIGHT1ST STAGE
2ND STAGE
3RD. STAGE
LEVEL TIME LEVEL TIME LEVEL TIME
0.5lb
60%
20sec. 40%
20sec. 30% 45sec.
(5)If improper operation is indicated, the control unit is probably defective and should be checked.
E
PROCEDURES TO BE TAKEN WHEN THE FUSE ON THE PRINTED WIRING BOARD (PWB) IS OPEN.
To protect the electronic circuits, this model is provided with a fuse added to the primary on the PWB.
1. Fuse check and repairs.
1) Disconnect the power supply cord, and then disassemble as per "OVEN/MICROWAVE DRAWER
DISASSEMBLY" page 40.
2) Open the drawer and block it open.
3) Discharge high voltage capacitor.
4) If the Fuse is blown, replace power unit.
5) Make a visual inspection of the varistor. Check for burned damage. If the varistor has been
burned, replace the power unit.
6) Examine the touch control transformer with a tester for the presence of layer short-circuit (check
the primary coil resistance which is approximately 60Ω ± 10%). If any abnormal condition is
detected, replace the touch control transformer.
7) Reconnect all leads removed from components during testing.
8) Re-install the covers.
9) Reconnect the power supply cord after the outer case is installed.
10) Run the oven and check all functions.
2. Follow the troubleshooting guide given below, if indicator does not light up after above check and
repairs are finished.
1) Disconnect the power supply cord, and then disassemble as per "OVEN/MICROWAVE DRAWER
DISASSEMBLY" page 40.
2) Open the door and block it open.
3) Discharge high voltage capacitor.
4) Disconnect the leads to the primary of the power transformer.
5) Ensure that these leads remain isolated from other components and oven chassis by using
insulation tape.
6) After that procedure, re-connect the power supply cord.
7) Follow the troubleshooting guide given below for repair.
20
KB-3425LS/K/W
KB-4425LS/K/W
TEST PROCEDURES
PROCEDURE
LETTER
COMPONENT TEST
STEPS
1
OCCURRENCE
CAUSE OR CORRECTION
The rated AC voltage is not present between Check supply voltage and oven power cord.
Pin Nos. 1and 3 of the 2-pin connecter (CN-B).
2
The rated AC voltage is present at primary side of touch control transformer.
Touch control transformer or secondary circuit defective.
Check and replace touch control transformer or power
unit .
8) Reconnect all leads removed from components during testing.
9) Re-install the covers.
10) Reconnect the power supply cord after the cabinets are installed.
11) Run the oven and check all functions.
F
AH SENSOR TEST
Checking the initial sensor cooking condition
WARNING : The oven should be fully assembled before following procedure.
(1) The oven should be plugged in at least two minutes before sensor cooking.
(2) Room temperature should not exceed 95oF (35oC).
(3) The unit should not be installed in any area where heat and steam are generated. The unit should not be
installed, for example, next to a conventional surface unit. Refer to the “INSTALLATION INSTRUCTIONS”
of the operation manual.
(4) Exhaust vents are provided on the back of the unit for proper cooling and air flow in the cavity. To permit
adequate ventilation, be sure to install so as not to block these vents. There should be some space for
air circulation.
(5) Be sure the exterior of the cooking container and the interior of the oven are dry. Wipe off any moisture
with a dry cloth or paper towel.
(6) The Sensor works with food at normal storage temperature. For example, chicken pieces would be at
refrigerator temperature and canned soup at room temperature.
(7) Avoid using aerosol sprays or cleaning solvents near the oven while using Sensor settings. The sensor
will detect the vapor given of by the spray and turn off before food is properly cooked.
(8) If the sensor has not detected the vapor of the food, ERROR will appear and the oven will shut off.
Water load cooking test
WARNING : The oven should be fully assembled before following procedure.
<
Make sure the oven has been plugged in at least two minutes before checking sensor cook operation. The
cabinet should be installed and screws tightened.
(1) Fill approximately 200 milliliters (7.2 oz) of tap water in a 1000 milliliter measuring cup.
(2) Place the container on the center of tray in the oven cavity.
(3) Close the door.
(4) Touch the UPER MICROWAVE OVEN pad,
pad,
pad, START MINUTE PLUS pad and the
SENSOR LOAD pad on the LCD. And touch the number pad 4 once. Now, the oven is in the sensor
cooking condition, and "20BIT" and "MICRO" will appear in the display.
(5) The oven will operate for the first 16 seconds, without generating microwave energy.
NOTE: ERROR will appear if the door is opened or STOP/CLEAR pad is touched during first stage of sensor
cooking.
(6) After approximately 16 seconds, microwave energy is produced.
If ERROR is displayed or the oven does not turn off, replace the AH sensor or check the control unit, refer
to explanation below.
<
TESTING METHOD FOR AH SENSOR AND/OR CONTROL UNIT
To determine if the sensor is defective, the simplest method is to replace it with a new replacement
sensor.
1) Disconnect the power supply cord, and then disassemble as per "OVEN/MICROWAVE DRAWER DISASSEMBLY" page 40.
2) Open the drawer and block it open.
3) Discharge high voltage capacitor.
4) Remove the AH sensor.
21
KB-3425LS/K/W
KB-4425LS/K/W
PROCEDURE
LETTER
COMPONENT TEST
<
<
(5) Install the new AH sensor.
(6) Reconnect all leads removed from components during testing.
(7) Re-install the outer case (cabinet).
(8) Reconnect the power supply cord after the cabinets are installed.
(9) Reconnect the oven to the power supply and check the sensor cook operation as follows:
9-1. Fill approximately 200 milliliters (7.2 oz) of tap water in a 1000 milliliter measuring cup.
9-2. Place the container on the center of tray in the oven cavity.
9-3. Close the door.
9-4. Touch the UPER MICROWAVE OVEN pad,
pad,
pad, START MINUTE PLUS pad and the
SENSOR LOAD pad on the LCD. And touch the number pad 4 once.
9-5. The control panel is in automatic Sensor operation.
9-6. The oven turns off automatically, and the time for detecting moisture will be displayed.
If new sensor dose not operate properly, the problem is with the control unit, and refer to explanation below.
CHECKING CONTROL UNIT
(1) Disconnect the power supply cord, and then disassemble as per "OVEN/MICROWAVE DRAWER
DISASSEMBLY" page 40.
(2) Open the drawer and block it open.
<
(3) Discharge high voltage capacitor.
(4) Disconnect the sensor connector that is mounted to control panel.
(5) Then connect the dummy resistor circuit (see fig.) to the sensor connector of control panel.
(6) Disconnect the leads to the primary of the power transformer.
(7) Ensure that these leads remain isolated from other components and oven chassis by using insulation
tape.
(8) After that procedure, re-connect the power supply cord.
(9) Check the sensor cook operation proceed as follows:
9-1. Close the door. 9-2. Touch the UPER MICROWAVE OVEN pad,
pad,
pad, START MINUTE PLUS pad and the
SENSOR LOAD pad on the LCD. And touch the number pad 4 once.
9-3. The control panel is in the sensor cooking operation.
9-4. After approximately 25 seconds, push plunger of select switch for more than 3 seconds. This condition
is same as judgement by AH sensor.
9-5. After approximately 3 seconds, the display shows “ X X . X X “ which is the time for detecting
moisture.
If the above is not the case, the control unit is probably defective.
If the above is proper, the AH sensor is probably defective.
(10)Disconnect the power supply cord, and the covers.
(11)Open the door and block it open.
(12)Discharge high voltage capacitor.
(13)Disconnect the dummy resistor circuit from the sensor connector of control panel.
(14)Carry out necessary repair.
(15)Reconnect all leads removed from components during testing and repairing.
(16)Re-install the covers.
(17)Reconnect the power supply cord after the cabinets are installed. Run the oven and check all
functions.
(18)Carry out "Water load cooking test" again and ensure that the oven works properly.
<
TEST PROCEDURES
R1, R2 : 22Ω ± 1% 1/2W
R3 : 4.3kΩ ± 5% 1/4W
R4 : 1MΩ ± 5% 1/4W
F-1
F-2
To connector (F)
on Control Unit.
1
2
3
F-3
CONNECTOR
Plunger
NC
NO
COM
COM NO
R1
R2
22
R3
R4
NC
KB-3425LS/K/W
KB-4425LS/K/W
TEST PROCEDURES
PROCEDURE
LETTER
G
COMPONENT TEST
SURFACE ELEMENT CONTROL SYSTEMS
Di al Posit ion
Contacts
Two types of surface elements control systems are
covered in this manual.
1.
Standard infinite switch.
2.
Dual infinite switch.
OFF
LO-MED
HI
P2 - P
O
X
X
P2 - 4
O
X
X
P1 - 2
O
X- C
X
O
- open
X
- closed
P1
Standard infinite switch:
The surface elements and standard infinite switches provide an infinite choice of heat settings for cooking. Controls are safety type and must be pushed in before turning. All surface controls are marked on the control panel
for their respective heating element. Power is supplied
to the surface elements through the infinite switch contacts P2-4 and P1-2. During actual surface element
operation, if the control is set to the high position contacts P1-2 are lock closed providing continuous power
to the element. In all other setting contacts L2-H2 will
cycle to maintain the correct heat setting. Contacts L1P provide power to the surface element indicator light.
2
4
PILOT
P2
Element does not heat:
Checking the system with a Voltmeter, if the element
does not heat up.
Troubleshooting:
1.
There are four ways a surface control system with a
standard infinite switch can fail.
Remove the back of the control panel to
expose the switch terminals.
2.
With a Voltmeter set for AC on a scale higher
than 240 Volts measure the voltage drop
between terminals P2 and P1. If the meter
reads zero the wiring between the main
terminal block on the range and the switch is
open. If the meter reads line to line voltage
(around 240 VAC) go to step 3.
3.
With the switch turned to the high position
measure the voltage drop between terminals
4 and 2. If the meter reads zero the switch
is defective. If the meter reads line to line
voltage the switch is good. If the range has
standard elements go to step 4. If the range
has a glass smooth go to step 5.
4.
Remove the element and measure the
voltage drop between terminals of the terminal
block. If the meter reads zero the terminal
block or the wiring between the switch and the
terminal block is open. If the meter reads line
to line voltage the element is defective.
1.
The element does not heat.
2.
The switch does not cycle the element off and
on when set to a position other than high.
3.
The element operates correctly, but the
indicator light does not glow.
4.
Indicator light glows with all infinite switches
in the off position.
NOTE: If the indicator light glows very dimly
with all the switches in the off position. This
problem is caused by a capacitive feed over in
the wiring and can be corrected by connecting
a 100,000 Ohm 1/4 watt resistor in parallel with
the light.
Continuity tests can be performed on the infinite switch
contacts. All tests should be performed with power to
the range disconnected, and wiring removed from the
switch. Set an ohmmeter on R X 1K scale and check
the contacts in the following chart and switch terminal
diagram.
23
NOTE: Always inspect the terminal block for
burnt spots that can cause poor connection.
5.
Raise the top and locate the two terminals on
the element that the wires from 4 and 2 are
on. Measure the voltage drop between the two
terminals. If the meter reads zero the wires
KB-3425LS/K/W
KB-4425LS/K/W
TEST PROCEDURES
PROCEDURE
LETTER
COMPONENT TEST
between the switch and the element are open.
If the meter reads line to line voltage the
element is defective.
Element does not cycle:
If the element does not cycle when the switch is set in a
position other than high the switch is defective.
Indicator light does not glow:
If indicator light does not glow when the switch is turned
on, remove the back panel of the backguard, turn the
switch on, and measure the voltage drop between terminals P and L2. If the meter reads zero the switch is
defective. If the meter reads line to line voltage (around
240 VAC) the light or the wiring to the light is defective.
Indicator light glows full brilliance with all top
element switches off:
If indicator light glows full brilliance with all top element
switches off, one or more of the switches are defective.
Disconnect electrical power from the range, and remove
the back panel of the backguard. Disconnect the wire
from the P terminal on all switches but one switch. Reconnect power. If the indicator light glows with the switch
in the off position, the switch is defective. If the indicator
light does not glow, the switch is good. Check each
switch by disconnecting the wires from all the other P
terminals but the switch you are testing.
S2
S1
providing power to both elements. When the knob is
turned counterclockwise, less than 180 degrees, contacts P2 to 4 and P1 to 2 close providing power to the
inner element. During actual surface element operation, if the control is set to the high position contacts P1
to 2 are locked closed providing continuous power to
the element. In all other settings contacts P1 to 2 will
cycle to maintain the correct heat setting. Contact 4 to
L2 provides power to the surface element indicator light.
See Cook Surface Schematic, Fig. 1
Dual infinite switch:
The dual infinite switch is used to control the expandable and bridge elements on electric smooth top ranges.
The dual infinite switches provide an infinite choice of
heat settings for cooking, and two selection of element
sizes. Controls are safety type and must be pushed in
before turning. All surface controls are marked on the
control panel for their respective heating element.
When the knob is turned clockwise, less than 180 degrees, contacts P2 to 4, P2 to 4A, and P1 to 2 closes
SMALL
ELEMENT
LARGE
ELEMENT
Troubleshooting:
There are six ways a surface control system with a dual
infinite switch can fail.
1.
Both elements do not heat.
2.
The outer element does not heat.
3.
The inner element does not heat.
4.
The switch does not cycle the element off and
on when set to a position other than high.
5.
The element operates correctly, but the
indicator light does not glow.
6.
Indicator light glows with all the infinite switches
in the off position.
NOTE: If the indicator light glows very dimly
with all the switches in the off position. This
problem is caused by a capacitive feed over in
the wiring and can be corrected by connecting
a 100,000 Ohm 1/4 watt resistor in parallel with
the light.
24
KB-3425LS/K/W
KB-4425LS/K/W
TEST PROCEDURES
PROCEDURE
LETTER
Both elements do not heat:
COMPONENT TEST
2.
With the switch turned clockwise to the high
position measure the voltage drop between
terminals 4 and 2. If the meter reads zero
the switch is defective. If the meter reads line
to line voltage, go to step 3.
Raise the top and locate the two terminals on
the element where the wires from terminals 4
and 2 are connected. Measure the voltage drop
between these two terminals. If the meter reads
zero the wires between the switch and the
element are open. If the meter reads line to
line voltage the element is defective.
Checking the system with a Voltmeter, if the elements
do not heat up:
1.
Remove the back panel of the backguard to
expose the switch terminals.
3.
2.
With a Voltmeter set for AC and a scale higher
than 240 Volts measure the voltage drop
between terminals P1 and P2. If the meter
reads zero the wiring between the main
terminal block on the range and the switch is
open. If the meter reads line to line voltage
(around 240 VAC) go to step 3.
Elements do not cycle:
3.
4.
With the switch turned clockwise to the HI
position, measure the voltage drop between
terminals 4 and 2. If the meter reads zero the
switch is defective. If the meter reads line to
line voltage measure the voltage drop between
terminals 4A and 2. If the meter reads line to
line voltage the switch is good. Go to step 4.
Raise the top and locate the two terminals on
the element with the wires from terminals 4
and 2 are connected. Measure the voltage drop
between these two terminals. If the meter reads
zero the wires between the switch and the
element are open. If the meter reads line to
line voltage the element is defective.
Outer element doesn’t heat, but inner element does:
Checking the system with a Voltmeter, if the outer element does not heat, but the inner element does:
1.
Remove the back panel of the backguard to
expose the switch terminals.
2.
With the switch turned clockwise to the high
position measure the voltage drop between
terminals 4A and 2. If the meter reads zero
the switch is defective. If the meter reads line
to line voltage, go to step 3.
3.
Raise the top and locate the two terminals on
the element where the wires from terminals 4A
and 2 are connected. Measure the voltage drop
between these two terminals. If the meter reads
zero the wires between the switch and the
element are open. If the meter reads line to
line voltage the element is defective.
If the elements do not cycle when the switch is set in a
position other than high the switch is defective.
Indicator light does not glow:
If indicator light does not glow when the switch is turned
on, remove the back panel of the backguard, turn the
switch on, and measure the voltage drop between terminals 4 and L2. If the meter reads zero the switch is
defective. If the meter reads line to line voltage (around
240VAC) the light or the wiring to the light is defective.
Indicator light glows full brilliance with all top element switches off:
If indicator light glows full brilliance with all top element
switches off, one or more of switches are defective. Disconnect electrical power from the range, and remove the
back panel of the backguard. Disconnect the wire from
terminal 4 on the switches from all but one switch. Reconnect power. If the indicator light glows with the switch
in the off position the switch is defective. If the indicator
light does not glow the switch is good. Check each dual
infinite switch by disconnecting the wires from all the
other 4 terminals but the switch you are testing.
Inner element doesn’t heat, but outer element does:
S2
S1
Checking the system with a Voltmeter, if the inner element does not heat, but the outer element does:
1.
See Cook Surface Schematic, Fig. 1
Remove the back panel of the backguard to
expose the switch terminals.
25
KB-3425LS/K/W
KB-4425LS/K/W
TEST PROCEDURES
PROCEDURE
LETTER
COMPONENT TEST
Refer to the disassembly instructions found on Page 16.
H
MAGNETRON ASSEMBLY TEST
1. Disconnect the power supply cord.
2. Open the drawer and keep it open.
3. To discharge high voltage capacitor, wait for 60 seconds.
4. To test for an open filament, isolate the magnetron from the high voltage circuit. A continuity check across
the magnetron filament leads should indicate less than 1 ohm.
5. To test for a shorted magnetron, connect the ohmmeter leads between the magnetron filament leads
and chassis ground. This test should indicate an infinite resistance. If there is little or no resistance the
magnetron is grounded and must be replaced.
6. Reconnect all leads removed from components during testing.
7. Reassemble the unit.
8. Reconnect the power supply cord.
9. Run the oven and check all functions.
MICROWAVE OUTPUT POWER
The following test procedure should be carried out with the microwave oven in a fully assembled condition.
HIGH VOLTAGES ARE PRESENT DURING THE COOK CYCLE, SO EXTREME CAUTION SHOULD BE
OBSERVED.
Power output of the magnetron can be measured by performing a water temperature rise test. This test
should only be used if above tests do not indicate a faulty magnetron and there is no defect in the following
components or wiring: inverter unit. This test will require a 16 ounce (453cc) measuring cup and an accurate
mercury thermometer or thermocouple type temperature tester. For accurate results, the following procedure
must be followed carefully:
1. Fill the measuring cup with 16 oz. (453cc) of tap water and measure the temperature of the water with
a thermometer or thermocouple temperature tester. Stir the thermometer or thermocouple through the
water until the temperature stabilizes. Record the temperature of the water.
2. Place the cup of water in the oven. Operate oven at POWER 10(HIGH) selecting more than 60 seconds
cook time. Allow the water to heat for 60 seconds, measuring with a stop watch, second hand of a watch
or the digital read-out countdown.
3. Remove the cup from the oven and again measure the temperature, making sure to stir the thermometer
or thermocouple through the water until the maximum temperature is recorded.
ο
4. Subtract the cold water temperature from the hot water temperature. The normal result should be 28 to
ο
ο
ο
54 F (16 to 30 C) rise in temperature. If the water temperatures are accurately measured and tested
for the required time period the test results will indicate if the magnetron tube has low power output (low
rise in water temperature) which would extend cooking time or high power output (high rise in water
temperature) which would reduce cooking time. Because cooking time can be adjusted to compensate
for power output, the magnetron tube assembly should be replaced only if the water temperature rise
test indicates a power output well beyond the normal limits. The test is only accurate if the power supply
line voltage is 120 volts and the oven cavity is clean.
I
OVEN THERMAL CUT-OUT TEST
1.
2.
3.
4.
Disconnect the power supply cord.
Open the drawer and keep it open.
To discharge high voltage capacitor, wait for 60 seconds.
A continuity check across the thermal cut-out terminals should indicate a closed circuit unless the
ο
ο
temperature of the thermal cut-out reaches approximately 293 F(145 C).
An open thermal cut-out indicates overheating of the oven, exchange the oven thermal cut-out and
check inside of oven cavity and for improper setting of cooking time or operation of control unit.
Check for restricted air flow through the vent holes of the oven cavity, especially the cooling fan and
air guide.
5. Reconnect all leads removed from components during testing.
6. Reassemble the unit.
7. Reconnect the power supply cord.
8. Run the unit and check all functions.
CAUTION: IF THE THERMAL CUT-OUT INDICATES AN OPEN CIRCUIT AT ROOM TEMPERATURE,
REPLACE THERMAL CUT-OUT.
26
KB-3425LS/K/W
KB-4425LS/K/W
TEST PROCEDURES
PROCEDURE
COMPONENT TEST
LETTER
J
SECONDARY INTERLOCK SWITCH TEST
1.
2.
3.
4.
Disconnect the power supply cord.
Open the drawer and keep it open.
To discharge high voltage capacitor, wait for 60 seconds.
Isolate the switch and connect the ohmmeter to the common (COM.) and normally open (NO)
terminal of the switch. The meter should indicate an open circuit with the drawer open and a closed
circuit with the drawer closed. If improper operation is indicated, replace the secondary interlock
switch.
5. Reconnect all leads removed from components during testing.
6. Reassemble the unit.
7. Reconnect the power supply cord.
8. Run the oven and check all functions.
K
STOP SWITCH TEST
STOP SWITCH
1. Disconnect the power supply cord.
2. Open the drawer and keep it open.
3. To discharge high voltage capacitor, wait for 60 seconds.
4. Isolate the switch and connect the ohmmeter to the common (COM.) and normally open (NO)
terminal of the switch. The meter should indicate an open circuit with the drawer open and a closed
circuit with the drawer closed. If improper operation is indicated, replace the stop switch.
5. Reconnect all leads removed from components during testing.
6. Reassemble the unit.
7. Reconnect the power supply cord.
8. Run the oven and check all functions.
NOTE: If the stop switch contacts fail in the open position and the door is closed, the cooling fan motor,
stirrer motor and oven light will be activated by RY1.
L
MONITOR SWITCH TEST
1.
2.
3.
4.
Disconnect the power supply cord.
Open the drawer and keep it open.
To discharge high voltage capacitor, wait for 60 seconds.
Before performing this test, make sure that the secondary interlock switch, according to the above
Switch Test Procedure. Disconnect the wire lead from the monitor switch (COM) terminal. Check
the monitor switch operation by using the ohmmeter as follows. When the drawer is open, the meter
should indicate a closed circuit. When the monitor switch actuator is pushed by a screw driver through
the lower latch hole on the front plate of the oven cavity with the drawer opened (in this condition the
plunger of the monitor switch is pushed in), the meter should indicate an open circuit. If improper
operation is indicated, the switch may be defective and both the monitor switch, plus fuse will need
to be replaced. After testing the monitor switch, reconnect the wire lead to the monitor switch (COM)
terminal and check the continuity of the monitor circuit.
5. Reconnect all leads removed from components during testing.
6. Reassemble the unit.
7. Reconnect the power supply cord.
8. Run the oven and check all functions.
MONITOR
SWITCH
(BLK)
Screw Driver
(RED)
Ohmmeter
(BRN,GRY)
(BRN,BLK)
SECONDARY
INTERLOCK
SWITCH
27
KB-3425LS/K/W
KB-4425LS/K/W
TEST PROCEDURES
PROCEDURE
LETTER
M
COMPONENT TEST
BLOWN MONITOR FUSE TEST
1. Disconnect the power supply cord.
2. Open the drawer and block it open.
3. To discharge high voltage capacitor, wait for 60 seconds.
4. If the monitor fuse is blown when the drawer is opened, check the primary interlock switch, secondary
interlock switch and monitor switch according to the "TEST PROCEDURE" for those switches before
replacing the blown monitor fuse.
CAUTION: BEFORE REPLACING A BLOWN MONITOR FUSE, TEST the SECONDARY interlock
SWITCH, sTOP switch and monitor switch FOR PROPER OPERATION.
If the monitor fuse is blown by improper switch operation, the monitor fuse and monitor switch must
be replaced with "monitor fuse and monitor switch assembly" part number FFS-BA018/KIT, even if
the monitor switch operates normally. The monitor fuse and monitor switch assembly is comprised
of a 20 ampere fuse and switch.
5. Reconnect all leads removed from components during testing.
6. Reassemble the unit.
7. Reconnect the power supply cord.
8. Run the oven and check all functions.
N
POWER TRANSFORMER TEST
1.
2.
3.
4.
Disconnect the power supply cord.
Open the drawer and block it open.
Discharge high voltage capacitor.
Disconnect the primary input terminals and measure the resistance of the transformer with an
ohmmeter. Check for continuity of the coils with an ohmmeter. On the R x 1 scale, the resistance
of the primary coil should be less than 1 ohm and the resistance of the high voltage coil should be
approximately 90 ohms; the resistance of the filament coil should be less than 1 ohm.
5. Reconnect all leads removed from components during testing.
6. Reassemble the unit.
7. Reconnect the power supply cord.
8. Run the oven and check all functions.
(HIGH VOLTAGES ARE PRESENT AT THE HIGH VOLTAGE TERMINAL, SO DO NOT ATTEMPT TO
MEASURE THE FILAMENT AND HIGH VOLTAGE.)
O
FAILURE CODES
The following failure codes will be displayed on the Control Panel.
EE 6
(displayed when oven starts) -
Oven Thermistor is shorted.
Check thermistor or control unit.
EE L
Oven Thermistor is open.
Check thermistor or control unit.
EE 7
(displayed when oven starts) -
(displayed after 1 minute of cooking or self cleaning) -
Lower door lock error.
Check lock motor, lock switch (RY 8) or control unit.
SPECAIL FAILURE NOTE:
During the Microwave Drawer operation, if it goes dead, check each Thermal Cut-out first.
This is due to the whole control unit being powered by Line L1 (refer to Schematic on page 13).
28
TOUCH CONTROL PANEL ASSEMBLY
KB-3425LS/K/W
KB-4425LS/K/W
OUTLINE OF TOUCH CONTROL PANEL
The touch control section consists of the following units.
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.
(1)Keyboard unit
(2)Control Unit
(3)Power unit
13) Buzzer Circuit
The buzzer is responsive to signals from the LSI to
emit audible sounds (key touch sound and completion
sound).
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.
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.
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.
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.
1) IC1 (LSI)
This is a microcomputer, responsible for controlling the
entire control unit.
17) Door Lock Monitor Switch (Oven)
A switch to “tell” the LSI if the oven door is locked or
not.
2) IC2
This is the IC to judge the selected key.
18) Door Position Switch Front / Rear
The switch to “tell” the position of the Microwave drawer
door.
3) IC3
This is the IC to judge the selected key.
4) IC4
This is the IC to judge the selected key.
19) Back Light Circuit
A circuit to drive the back light (Light emitting diodes
LD1- LD5).
5) IC5
This is the IC to amplify the signal from the humidity
sensor and the IC to amplify the signal to adust the
contrast of LCD.
20) Cook Top Warmer Indicator Circuit
A circuit to drive the indicator (LD10) for Cook Top
Warmer.
6) IC6
This is memory IC.
21) Transparent electrode (Touch key) on the
LCD
When the 1 - 6 of the transparent electrodes are
touched, the signal are input into the P96, P-95, P94,
P92, P91 and P90 of the LSI (IC-1) to perform the
function that was requested.
7) IC7
This is the IC to drive the relays.
8) IC8
This is the IC to drive the relays.
22) Humidity Sensor Circuit
This circuit detects moisture of the cooking food to allow
its automatic cooking.
9) Reset Circuit
This circuit generates a signal which resets the LSI (IC1)
to the initial state when power is supplied.
23) Temperature Measurement Circuit : (OVEN
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.
10) Indicator Circuit
A circuit to drive the Liquid Crystal Displays (LCD1).
11) Power Source Circuit
This circuit generates voltages necessary in the control
unit from the AC line voltage.
In addition, the synchronizing signal is available in order
to compose a basic standard time in the clock circuit.
Symbol Voltage VC +5V Application
LSI(IC1)
29
KB-3425LS/K/W
KB-4425LS/K/W
DESCRIPTION OF LSI (IC-1)
The I/O signal of the LSIis detailed in the following table.
Pin No.
Signal
I/O
Description
Signal coming from Transparent electrode (touch key on the LCD).
When the 1 key of the transparent electrode is touched, a corresponding signal out of
OUT1 of IC-2 will be input into P96 of IC-1.
2
P95
IN
Signal coming from Transparent electrode (touch key on the LCD).
When the 2 key of the transparent electrode is touched, a corresponding signal out of
OUT3 of IC-2 will be input into P95 of IC-1.
Signal coming from Transparent electrode (touch key on the LCD).
3
P94
IN
When the 3 key of the transparent electrode is touched, a corresponding signal out of
OUT4 of IC-2 will be input into P94 of IC-1.
4
P93
OUT The signal to adjust the contrast of LCD is output to IC-5.
5
P92
IN
Signal coming from Transparent electrode (touch key on the LCD).
When the 4 key of the transparent electrode is touched, a corresponding signal out of
OUT1 of IC-3 will be input into P92.
Signal coming from Transparent electrode (touch key on the LCD).
6
P91
IN
When the 5 key of the transparent electrode is touched, a corresponding signal out of
OUT3 of IC-3 will be input into P91.
Signal coming from Transparent electrode (touch key on the LCD).
7
P90
IN
When the 6 key of the transparent electrode is touched, a corresponding signal out of
OUT4 of IC-3 will be input into P90.
8
BYTE
IN
Connected to VCC1.
Power source voltage: 0V (GND).
9
CNVSS
IN
The power source vpltage to drive the LSI (IC-1) is input. Connected to GND.
10
P87
OUT Memory (EEPROM) clock out.
11
P86
IN/OUT Memory (EEPROM) data input/output.
12
RESET
IN
Auto clear terminal.
Signal is input to reset the LSI to the initial state when power is applied. Temporarily set
to “L” level the moment power is applied, at this time the LSI is reset. Thereafter set at
“H” level.
13
XOUT
OUT Internal clock oscillation frequency control output.
Output to control oscillation input of Xin.
Power source voltage: 0V (GND).
14
VSS
IN
The power source vpltage to drive the LSI (IC-1) is input. Connected to GND.
Internal clock oscillation frequency setting input.
15
XIN
IN
The internal clock frequency is set by inserting the ceramic filter oscillation circuit with
respect to Xout terminal.
16
VCC1
IN
Power source voltage: +5.0V.
The power source voltage to drive the LSI (IC-1) is input to VCC1 therminal.
17
NMI
IN
Connected to VCC1.
18
P84
IN
Input signal which communicates the drawer door close information to LSI from
the door sensing switch.
Door opened; “L” level signal(0V).
Door closed; “H” level signal(+5V).
Input signal which communicates the drawer door open information to LSI from
19
P83
IN
the door position switch front.
Door opened; “L” level signal(0V).
Door closed; “H” level signal(+5V).
1
P96
IN
30
KB-3425LS/K/W
KB-4425LS/K/W
Pin No.
Signal
I/O
20
INT0
IN
Description
Signal to synchronize LSI with commercial power source frequency.
This is the basic timing for all real time processing of LSI.
H : +5V
L : GND
6.7 msec.
21
P81
OUT
22
TA4OUT OUT
Signal to change the rotational direction is output to the Microwave drawer door
open-close motor.
0. sec
Signal to sound buzzer.
A: Key touch sound.
A
B: Completion sound.
2.0 sec
C: When the oven stops so that the food can be
B
checked in Automatic cooking mode.
.0 sec
.0 sec
H: +5V
C
L: GND
23
P77
OUT
24
TA3OUT
OUT
25
TA2IN
IN
P74-P70
A67-A65
P64 OUT
OUT
IN
26-30
31-33
34
35
TXD0
IN
36
RXD0
IN
37
P61
OUT
38
P60
IN
39
RDY
IN
40
ALE
OUT
41
HOLD
IN
42
HLDA
OUT
43
BCLK
IN
44
RD
OUT
45
WRH
OUT
46
WR
OUT
Magnetron high-voltage circuit driving signal.
To turn on and off the cook relay(RY2). In 100%
power operation, the signals holds “H” level during
microwave cooking and “L” level while not cooking.
In other cooking modes (90%, 80%, 70%, 60%,
50%, 40%, 30%, 20%, 10%, 0%) the signal turns
to “H” level and “L” level in repetition according to
the power level.
Microwave cooking mode
VARI MODE
Other cooking mode
ON TIME OFF TIME ON TIME OFF TIME
100% power
32 sec.
0 sec.
60sec.
0ec.
90% power
30 sec.
2 sec. 54sec.
6sec.
80% power
26 sec.
6 sec.
48sec.12sec.
70% power
24 sec.
8 sec.
42sec.18sec.
60% power
22 sec.10 sec.
36sec.
24sec.
50% power18 sec.14 sec.
30sec.
30sec.
40% power16 sec.16 sec.
24sec.
36sec.
30% power12 sec.
20 sec.18sec.
42sec.
20% power
8 sec.
24 sec.12sec.
48sec.
10% power
6 sec.
26 sec.
4sec.
56sec.
0% power0 sec.
32 sec.
0sec.
60sec.
Signal to change the rotational speed is output to the Microwave drawer door open-close
motor.
Plus signal coming from the Microwave drawer door open-close motor is input into TA2IN
as revolution number.
Used for initial balancing of the bridge circuit (absolute humidity sensor).
Turminal not used.
To input signal which communicates the oven door open/close information to
LSI.
Door open "H" level signal (+5V). Door close "L" level signal (GND).
Signal coming from key unit.
Signal coming from key unit.
Signal to reset LSI.
Signal is output to reset IC-2, IC-3 and IC-4.
Signal coming from key unit.
Connected to VCC2 (+3.3V).
Turminal not used.
Connected to VCC2 (+3.3V).
Turminal not used.
Connected to VCC2 (+3.3V).
Read strobe signal is outout to the LCD.
Turminal not used.
Write strobe signal is outout to the LCD.
31
KB-3425LS/K/W
KB-4425LS/K/W
Pin No.
Signal
I/O
47
P47
OUT
48
CS2
OUT
49
P45
OUT
50
P44
OUT
51
P43 OUT
52
P42
OUT
53
P41 OUT
54
P40 IN
55
P37
OUT
56
P36
OUT
57
P35
OUT
58
P34
OUT
59 - 61 A11 - A9 OUT
62
VCC2
IN
63
A8
OUT
64
VSS
IN
65 - 70
A7 - A2
OUT
71
A1
OUT
72
A0
OUT
73
P17
OUT
74
P16
OUT
75
P15
OUT
76
P14
OUT
Description
Reset signal is outout to the LCD.
Chip select signal is outout to the LCD.
Turminal not used.
Turminal not used.
Signal to turn on the indicator for the Cook Top Warmer is output to the LED (LD10).
Door lock motor driving signal.
ON
H: +5V
During
To turn on and off shut-off relay(RY8).
door lock
OFF
motor
driving
“H”level during door lock motor driving
L: GND
“L” level otherwise
Power source to drive the Microwave drawer door open-close motor is output.
Turminal not used.
Convection heater relay driving signal.
ON
H: +5V
To turn on and off relay(RYC).
“H” level: During convection heater relay ON.
L: GND
OFF
“L” level: During convection heater relay OFF.
Bottom heater relay driving signal.
ON
H: +5V
To turn on and off relay(RYB).
“H” level: During bottom heater relay ON.
L: GND
OFF
“L” level: During bottom heater relay OFF.
Cook top warmer driving signal.
ON
H: +5V
To turn on and off relay(RY10).
“H” level: During cook top warmer ON.
L: GND
OFF
“L” level: During cook top warmer OFF.
Oven convection motor driving signal.
ON
H: +5V
To turn on and off relay(RY9).
“H” level: During convection motor ON.
L: GND
OFF
“L” level: During convection motor OFF.
Turminal not used.
Power source voltage: +3.3V.
The power source voltage to drive the LSI (IC-1) is input to VCC2 terminal.
Turminal not used.
Power source voltage: 0V (GND).
VS voltage of power source circuit input. Connected to GND
Turminal not used.
Register select signal is input to the LCD.
Turminal not used.
Signal to sound buzzer.
A: Key touch sound (short beep).
B: Completion sound (melody or long beep).
Door lock motor (Oven) driving signal.
ON
H: +5V
To turn on and off relay(RY8).
“H” level: During door lock motor ON.
L: GND
OFF
“L” level: During door lock motor OFF.
Oven lamp (Oven) driving signal.
ON
H: +5V
To turn on and off relay(RY7).
“H” level: During oven lamp ON.
L: GND
OFF
“L” level: During oven lamp OFF.
Fan motor (Oven) driving signal.
ON
To turn on and off relay(RY6).
H: +5V
“H” level: During fan motor ON.
OFF
32
L: GND
KB-3425LS/K/W
KB-4425LS/K/W
Pin No.
Signal
I/O
77
P13
OUT
78
P12
OUT
79
P11
OUT
80
P10
OUT
81 - 88
D7 - D0 OUT
89
AN7
OUT
90
AN6
IN
91
AN5
IN
92
AN4
IN
93
AN3
IN
94
AN2
IN
95
AN1
IN
96
AVSS
IN
97
AN0
IN
98
VREF
IN
99
AVCC
IN
100
P97
OUT
Description
“L” level: During fan motor OFF.
ON
Fan motor (Drawer) driving signal.
H: +5V
To turn on and off relay(RY5).
L: GND
OFF
“H” level: During fan motor ON.
“L” level: During fan motor OFF.
Top heater driving signal.
ON
H: +5V
To turn on and off relay(RY4).
“H” level: During top heater ON.
L: GND
OFF
“L” level: During top heater OFF.
Oven common relay driving signal.
ON
H: +5V
To turn on and off relay(RY3).
“H” level: During oven common relay ON.
L: GND
OFF
“L” level: During oven common relay OFF.
Oven lamp and stirrer motor (drawer) driving signal.
ON
H: +5V
To turn on and off relay(RY1).
“H” level: During oven lamp and stirrer motor ON.
L: GND
OFF
“L” level: During oven lamp and stirrer motor OFF.
Data signal is output to LCD driver.
Turminal not used.
AH sensor input.
This input is an analog input terminal from the AH sensor circuit, and connected to the
A/D converter built into the LSI.
Used for initial balancing of the bridge circuit (absolute humidity sensor). This input is
an analog input terminal from the AH sensor circuit, and connected to the A/D converter
built into the LSI.
Terminal to change the specifications of the LSI.
By using A/D converter contained in the LSI, DC voltage in accordance wityh the Model
in operation is applied to set up its cooking constant.
Input signal which inform the drawer door is in the middle position between the opened
position and the closed position, to LSI from the door position switch rear.
Input signal which communicates the oven door locked information to LSI.
Door unlocked; “H” level signal(+5V).
Door locked; “L” level signal(0V).
Input signal which communicates the oven door unlocked information to LSI.
Door locked; “H” level signal(+5V).
Door unlocked; “L” level signal(0V).
A/D converter power source voltage.
The power source voltage to drive the A/D converter in the LSI.
Temperature measurement input: OVEN THERMISTOR.
By inputting DC voltage corresponding to the temperature detected by the thermistor,
this input is converted into temperature by the A/D converter built into the LSI.
Reference voltage input terminal.
A reference voltage applied to the A/D converter in the LSI. Connected to +5V.
A/D converter power source voltage.
The power source voltage to drive the A/D converter in the LSI. Connected to Vcc1
(+5V).
Common relays driving signal. (Square Waveform : 60Hz)
To turn on and off the shut-off relays (RY1 and RY3). The square waveform voltage is
delivered to the relays (RY1 and RY3) driving circuit.
6.7 msec.
H: +5V
L: GND
During cooking
33
KB-3425LS/K/W
KB-4425LS/K/W
HUMIDITY SENSOR CIRCUIT
(1)Structure of Humidity Sensor
The humidity sensor includes two thermistors as shown
in the illustration. One thermistor is housed in the closed
vessel filled with dry air while another in the open vessel.
Each sensor is provided with the protective cover made of
metal mesh to be protected from the external airflow.
ventilation opening for sensing
Thermistors
Sensing part
(Closed vessel)
(2)Operational Principle of Humidity Sensor
The figure below shows the basic structure of an
absolute humidity sensor. A bridge circuit is formed by
two thermistors and two resistors (R1 and R2).
The output of the bridge circuit is to be amplified by the
operational amplifier.
Each thermistor is supplied with a current to keep it heated
at about 150οC (302οF), the resultant heat is dissipated
in the air and if the two thermistors are placed in different
humidity conditions they show different degrees of heat
conductivity leading to a potential difference between
them causing an output voltage from the bridge circuit, the
intensity of which is increased as the absolute humidity
of the air increases. Since the output is varied every
minute, it is amplified by the operational amplifier.
C
R2
Operational
amplifier
Output
voltage
+
S : Thermistor
open vessel
C : Thermistor
closed vessel
K
D40
C. Thermistor in
closed vessel
S. Thermistor in
open vessel
13
R4
K
.57
23
R43 1.8K
(3)Detector Circuit of Humidity Sensor Circuit
This detector circuit is used to detect the output voltage
of the absolute humidity circuit to allow the LSI to
control sensor cooking of the unit. When the unit is set
in the sensor cooking mode, 16 seconds clearing cycle
occurs than the detector circuit starts to function and
the LSI observes the initial voltage available at its AN5
terminal.
With this voltage given, the switches SW1 to SW5 in
the LSI are turned on in such a way as to change the
resistance values in parallel with R45 ~ R49. Changing
34
2
8
+
IC5
4
90
1
R50 10K
R52 47K
AN6
LSI
(IC1)
R44 360K
R51 47K
91
R45 620K
30
R46 300K
29
R47 150K
Absolute humidity (g/m 2 )
D41
86
3
C42 0.1µF
R
F1
Output voltage
S
Absolute humidity vs,
output voltage characteristic
C
S
.32
F2
F3
R3
VC : +5V
R40
430
VA : +15V
R4
Sensing part
(Open vessel)
the resistance values results in that there is the same
potential at both F-3 terminal of the absolute humidity
sensor and AN5 terminal of the LSI. The voltage of AN6
terminal will indicate about +2.5V. This initial balancing is
set up about 16 seconds after the unit is put in the Sensor
Cooking mode. As the sensor cooking proceeds, the food
is heated to generate moisture by which the resistance
balance of the bridge circuit is deviated to increase the
voltage available at AN5 terminal of the LSI.
Then the LSI observes that voltage at AN6 terminal and
compares it with its initial value, and when the comparison
rate reaches the preset value (fixed for each menu to
be cooked), the LSI causes the unit to stop sensor
cooking; thereafter, the unit goes in the next operation
automatically.
When the LSI starts to detect the initial voltage at AN6
terminal 16 seconds after the unit has been put in the
Sensor Cooking mode, if it is not possible to balance
the bridge circuit due to disconnection of the absolute
humidity sensor, ERROR will appear on the display and
the cooking is stopped.
28
R48 75K
27
R49 37.4K
26
AN5
P70
SW1
SW2
P71
SW3
P72
SW4
P73
SW5
74
KB-3425LS/K/W
KB-4425LS/K/W
IC-7
IC-8
OVEN TEMPERATURE/SELF CLEANING CONTROL CIRCUIT
35
KB-3425LS/K/W
KB-4425LS/K/W
OVEN DOOR LOCK MOTOR CONTROL CIRCUIT
36
KB-3425LS/K/W
KB-4425LS/K/W
OVEN DOOR LOCK MOTOR DETECTION CIRCUIT
37
KB-3425LS/K/W
KB-4425LS/K/W
TOUCH CONTROL PANEL SERVICING
touch control panel and the oven itself is so short that
the two can’t be separated. For those models, check and
repair all the controls (sensor-related ones included) of
the touch control panel while keeping it connected to
the oven.
B. On some models, the power supply cord between the
touch control panel and the oven proper is long enough
that they may be separated from each other. For those
models, it is possible to check and repair the controls of
the touch control panel while keeping it apart from the
oven proper; in this case you must short both ends of
the door sensing switch (on PWB) of the touch control
panel with a jumper, which activates an operational state
that is equivalent to the oven drawer being closed. As for
the sensor-related controls of the touch control panel,
checking them is possible if dummy resistor(s) with
resistance equal to that of the controls are used.
(2)Servicing the touch control panel with power supply
from an external power source:
Disconnect the touch control panel completely from
the oven proper, and short both ends of the drawer
sensing switch (on PWB) of the touch control panel,
which activates an operational state that is equivalent
to the oven door being closed. Connect an external
power source to the power input terminal of the touch
control panel, then it is possible to check and repair the
controls of the touch control panel it is also possible to
check the sensor-related controls of the touch control
panel by using the dummy resistor(s).
1. Precautions for Handling Electronic Components
This unit uses CMOS LSI in the integral part of the circuits.
When handling these parts, the following precautions
should be strictly followed. CMOS LSI have extremely
high impedance at its input and output terminals. For
this reason, it is easily influenced by the surrounding
high voltage power source, static electricity charge in
clothes, etc. and sometimes it is not fully protected by
the built-in protection circuit.
In order to protect CMOS LSI.
1) When storing and transporting, thoroughly wrap them
in aluminium foil. Also wrap all PW boards containing
them in aluminium foil.
2) When soldering, ground the technician as shown in
the figure and use grounded soldering iron and work
table.
approx. M ohm
2. Servicing of Touch Control Panel
We describe the procedures to permit servicing of the
touch control panel of the microwave oven and the
precautions you must take when doing so. To perform the
servicing, power to the touch control panel is available
either from the power line of the oven itself or from an
external power source.
(1)Servicing the touch control panel with power supply
of the oven:
CAUTION:
THE HIGH VOLTAGE TRANSFORMER OF THE
MICROWAVE OVEN IS STILL LIVE DURING
SERVICING AND PRESENTS A HAZARD.
Therefore, before checking the performance of the touch
control panel,
1) Disconnect the power supply cord.
2) Open the drawer and block it open.
3) Discharge high voltage capacitor.
4) Disconnect the leads to the primary of the power
transformer.
5) Ensure that these leads remain isolated from other
components and oven chassis by using insulation
tape.
6) After that procedure, re-connect the power supply
cord.
After checking the performance of the touch control
panel,
1) Disconnect the power supply cord.
2) Open the drawer and block it open.
3) Re-connect the leads to the primary of the power
transformer.
4) Reassemble the unit.
5) Re-connect the power supply cord after the outer
case is installed.
6) Run the oven and check all functions.
A. On some models, the power supply cord between the
3. Servicing Tools
Tools required to service the touch control panel
assembly.
1) Soldering iron: 30W
(It is recommended to use a soldering iron with a
grounding terminal.)
2) Oscilloscope: Single beam, frequency range: DC10MHz type or more advanced model.
3) Others: Hand tools
4. Other Precautions
1) Before turning on the power source of the control
unit, remove the aluminium foil applied for preventing
static electricity.
2) Connect the connectors of the key unit to the control
unit being sure that the lead wires are not twisted.
3) After aluminium foil is removed, be careful that
abnormal voltage due to static electricity etc. is not
applied to the input or output terminals.
4) Attach connectors, electrolytic capacitors, etc. to
PWB, making sure that all connections are tight.
5) Be sure to use specified components where high
precision is required.
38
KB-3425LS/K/W
KB-4425LS/K/W
PRECAUTIONS FOR USING LEAD-FREE SOLDER
1. Employing lead-free solder
The "Main PWB" of this model employs lead-free solder. This is indicated by the "LF" symbol printed on the PWB and
in the service manual. The suffix letter indicates the alloy type of the solder.
Example:
Indicates lead-free solder of tin, silver and copper.
2. Using lead-free wire solder
When repairing a PWB with the "LF" symbol, only lead-free solder should be used. (Using normal tin/lead alloy solder
may result in cold soldered joints and damage to printed patterns.)
As the melting point of lead-free solder is approximately 40oC higher than tin/lead alloy solder, it is recommend that
a dedicated bit is used, and that the iron temperature is adjusted accordingly.
3. Soldering
As the melting point of lead-free solder (Sn-Ag-Cu) is higher and has poorer wettability, (flow), to prevent damage
to the land of the PWB, extreme care should be taken not to leave the bit in contact with the PWB for an extended
period of time. Remove the bit as soon as a good flow is achieved. The high content of tin in lead free solder will cause
premature corrosion of the bit. To reduce wear on the bit, reduce the temperature or turn off the iron when it is not
required.
Leaving different types of solder on the bit will cause contamination of the different alloys, which will alter their
characteristics, making good soldering more difficult. It will be necessary to clean and replace bits more often when
39
KB-3425LS/K/W
KB-4425LS/K/W
OVEN / MICROWAVE DRAWER DISASSEMBLY
WARNING: Follow all safety precautions beginning on Page 2 before proceeding!
Fig. 1
1. Before removing Control Panel, take measures to protect
the Cook Top surface and keep Microwave Drawer
open to prevent scratches.
Control Knobs
Retainers
2. Remove all Control Knobs (Fig 1).
Glass Key Deco
3. Unscrew all Retainers (Fig 1).
GND Deco Screw
4. Unscrew Glass Key Deco screw (1) (Fig 1).
5. Carefully lift Glass Key Deco and unhook
Indicator Lamp from Lens (Fig 1).
Lens
Indicator Lamps
6. Remove all screws from Control Panel Mold (Fig 2).
Fig. 2
7. Slide Control Panel Mold to left (to unlock) and lift (Fig 2).
Control Panel Mold
8. Remove Gasket from Key Fixing Angle (Fig 3).
Gasket
9. Lift Key Fixing Mold and carefully unhook all Molex’s, ground wire and C/P wiring (Fig 3).
Fig. 3
Key Fixing Angle
NOTE: When reassembling, it is very important
that all Cook Top wires are tucked under the
Microwave cavity lip and secured with the RED
WIRE STRAP. The 240v harness can create
noise that can interfere with C/P function (example: intermittent or no keyboard operation).
40
w
KB-3425LS/K/W
KB-4425LS/K/W
Fig. 4
10. Remove screws from Control Panel Frame (Fig 4).
Control Panel Frame
11. (KB3425L) - Slide Cook Top forward to unlock from shoulder screws, then remove or reposition (Fig. 5).
(KB4425L) - Before you can Slide the Cook Top forward to unlock it from shoulder screws, you must remove one screw from each right and left slide angle (Fig. 5A). This is done by removing the (3) screws holding the back panel to the side panels (Fig. 6), then carefully swing the back of the side panel out, to gain access to the screw holding each right and left slide angle. Cook Top
Fig. 5
Fig. 5A
Fig. 6
Slide angle
Back Panel
12. Remove electrical cover and screws holding the select switch from back plate. Then remove all
screws on back plate and carefullyremove
back/side panels (Fig. 6).
Select Switch
Side Panels
41
KB-3425LS/K/W
KB-4425LS/K/W
14. Remove screws from Microwave top Air Duct and take off (Fig. 7).
15. Remove all screws from Microwave Back Plate (Fig. 7).
Air Duct
Fig. 7
16. Lift Back Plate and remove carefully not to damage any wires (Fig. 7).
NOTE:
The Microwave Back Plate cannot be
completely removed due to wiring. If you need to remove, you will have to unhook all
wiring routed through it.
Back Plate
Also, the cushion placement is very important and must be replaced if damaged during
removal (Fig. 8).
Fig. 8
At this point, you will have access to all parts of the Microwave and Oven. MICROWAVE DRAWER ASSEMBLY REMOVAL TO ACCESS OVEN COMPONENTS
OVEN COMPONENT REMOVAL
1. After dissaembly as previously stated, remove Microwave Drawer assembly by removing (2) screws (right & left) from
front of Microwave Baseplate (Fig. R-1).
2. Unhook wires from Range Oven to Microwave Drawer, remove Drawer assembly from Oven.
You now have access to Range Oven components.
screw
Fig. R-1
42
KB-3425LS/K/W
KB-4425LS/K/W
STOP SWITCH, SECONDARY INTERLOCK SWITCH AND MONITOR SWITCH REMOVAL
2.
the drawer
and keep
it open.
1. Open
Disconnect
the power
supply
cord.
3. To discharge the high voltage capacitor, wait for 60
seconds.
4. Remove the Cook Top.
5. Remove the Cook Top Stay (right or left).
6. Remove the screw holding the latch hook to the oven
flange.
7. Remove the latch hook from the oven flange.
8. Disconnect the wire leads of each switch.
9. Remove each switch from the latch hook by pushing the
one (1) stopper tab holding each switch.
10.Now, each switch is free.
Re-install
1. Re-install each switch in its place.The secondary interlock
switch is in the lower position and the monitor switch is
in the top position, located on the left side of the unit.
The door sensing switch by itself on the right side of the
unit.
2. Re-connect wire leads to each switch. Refer to pictorial
diagram.
3. Secure the latch hooks with mounting screws to oven
flange.
4. Make sure that the monitor switch is operating properly
and check continuity of the monitor circuit. Refer to
chapter "Test Procedure" and "Adjustment procedure".
Latch Hook Right
Latch Hook Left
STOP SWITCH, SECONDARY INTERLOCK SWITCH AND MONITOR SWITCH ADJUSTMENT
1. Disconnect the power supply cord.
2. Open the drawer and keep it open.
3. To discharge the high voltage capacitor, wait for 60
seconds.
4. Remove the Cook Top.
5. Remove the Cook Top Stay (right or left). If the door
sensing switch, secondary interlock switch and monitor
switch do not operate properly due to a misadjustment,
the following adjustment should be made.
6. Loosen the screw holding latch hook to the oven cavity
flange.
7. With drawer closed, adjust latch hook by moving it back
and forth, and up and down. In and out play of the door
allowed by the upper and lower position of the latch hook
should be less than 0.5mm. The vertical position of the
latch hook should be adjusted so that the secondary
interlock switch is activated with the drawer closed. The
horizontal position of the latch hook should be adjusted
so that the monitor switch and drawer sensing switch
are activated with the drawer closed.
8. Secure the screws with washers firmly.
9. Check all of the switches operation. If any switch has
not activated fully, you will need to adjust the slide rail
attached to the Microwave cavity.
10.This is done by following the steps to remove the
"DRAWER/SLIDE RAIL REMOVAL" on page 42. After
you have removed the slide rails, loosen the "2" screws
holding the slide rail to the Microwave cavity and tilt the
front end up and the rear end down, then tighten the
screws (Fig. S-1).
11.Check and assure that the cap nuts on the Drawer
Support Angles are centered when passing through the
cavity face plate.
After adjustment, check the following.
1. In and out play of door remains less than 0.5mm when
in the latched position. First check upper position of latch
hook, pushing and pulling upper portion of drawer toward
the oven face. Then check lower portion of the latch hook,
pushing and pulling lower portion of the door toward the
oven face. Both results (play in the door) should be less
than 0.5mm.
2. The secondary interlock switch switch interrupt the circuit
before the door can be opened.
3. Monitor switch contacts close when door is opened.
4. Door sensing switch contacts open when door is
opened.
5. Reassemble the unit and check for microwave leakage
around door with an approved microwave survey meter.
(Refer to Microwave Measurement Procedure.
Fig. S-1
43
KB-3425LS/K/W
KB-4425LS/K/W
DRAWER/SLIDE RAIL REMOVAL
DRAWER
AND
CHOKE REMOVAL
1.
DisconnectASSEMBLY
the power supply
cord.
2. Open the drawer and keep it open.
3. To discharge the high voltage capacitor, wait for 60
seconds.
4. Remove the both right and left Cook Top Stays.
5. Remove (2) Drawer Support Covers from Choke Cover
as shown in (Fig. D-1).
6. Insert a putty knife (thickness of about 0.5mm) into the
gap between the choke cover and the door frame.
7. Carefully slide choke cover away from drawer as far as
possible.
8. Remove (6) screws from all (3) drawer Support Angles
as shown in (Fig. D-2).
9. Unhook Drawer Support Angles from drawer, then
remove.
10.Now, the door assembly is free and the Choke Cover
can now be removed.
Fig. D-1
NOTE:
To remove only the
Microwave Drawer, follow steps
1, 2, 5, 8, 9 & 10
as instructed under
"DRAWER ASSEMBLY AND
CHOKE REMOVAL".
Fig. D-2
DRAWER SUPPORT ANGLE REMOVAL
1. Remove Drawer Assembly and Choke Cover as stated
in "DRAWER ASSEMBLY AND CHOKE REMOVAL".
2. Remove (2) screws from right or left Latch Angle
Assembly, then remove Angle assembly (Fig. D-4).
3. Separate Slide Rails by moving inside lever of Slide
Rails. The Slide Rail will now separate by pulling straight
forward and out (Fig. D-3).
4. At this point, you can replace either Latch Angle Assy
or Latch Angles.
To reassemble, just reverse the above order.
After reassembly, do the following.
(A) Make sure that drawer sensing switch, secondary
interlock switch and monitor switch are operating
properly. (Refer to chapter "Test Procedures".)
(B) An approved microwave survey meter should be
used to assure compliance with proper microwave
radiation emission limitation standards.
Fig. D-3
After any servicing, make sure of the following :
1. Drawer latch heads smoothly catch latch hook through
latch holes and that latch head goes through center of
latch hole.
2. Deviation of door alignment from horizontal line of cavity
face plate is to be less than 1.0mm.
3. Drawer is positioned with its face pressed toward cavity
face plate.
4. Reassemble the unit and check for microwave leakage
around drawer with an approved microwave survey meter.
(Refer to Microwave Measurement Procedure.)
Fig. D-4
Note: The drawer on a microwave oven is designed to
act as an electronic seal preventing the leakage
of microwave energy from oven cavity during
cook cycle. This function does not require that
door be air-tight, moisture (condensation)-tight
or light-tight. Therefore, occasional appearance
of moisture, light or sensing of gentle warm air
movement around oven drawer is not abnormal
and do not of themselves indicate a leakage of
microwave energy from oven cavity.
44
KB-3425LS/K/W
KB-4425LS/K/W
SWITCH ANGLE REMOVAL/ADJUSTMENT
SWITCH ANGLE REMOVAL
Fig. S-1
(Locate either the right or left switch angle)
1.
2.
3.
4.
Follow the Microwave Drawer disassembly as previously stated.
Open the drawer and keep it open.
To discharge the high voltage capacitor, wait for 60 seconds.
To remove switch, remove screw (1) holding switch to switch angle (Fig. S1).
5. To replace switch angle, remove bottom cover and remove the 2 screws holding
the switch lever (Fig. S-2).
6. Proceed in reverse to reinstall.
7. Adjust switch.
Fig. S-2
ACTUATOR REMOVAL/ADJUSTMENT
1.
2.
3.
4.
Follow the Microwave Drawer disassembly as previously stated.
Open the drawer and keep it open.
To discharge the high voltage capacitor, wait for 60 seconds.
Locate either the right or left actuator and remove the 2 screws holding the actuator to the door support
angles.
5. Replace with the new actuator (Fig. A-3).
Actuator adjustment
6. It is very critical that proper adjustment is made to actuator.
7. Adjust each actuator to fully depress ("0" gap) switch lever switches on left and right side (Fig. A-4).
NOTE: If this adjustment is not adjusted correctly, it will effect the performance of the Auto Drawer.
Fig. A-3
Fig. A-4
45
KB-3425LS/K/W
KB-4425LS/K/W
AUTO DRAWER GEAR REMOVAL
1.
2.
3.
4.
5.
5.
6.
7.
Follow the Microwave Drawer disassembly as previously stated.
Open the drawer and keep it open.
To discharge the high voltage capacitor, wait for 60 seconds.
Unhook wiring Auto Drawer Gear.
Remove the (4) screws holding the auto drawer gear to the bottom cavity angle (Fig. G-1).
Pull drawer gear from cavity angle.
The drawer gear is now free.
Proceed in reverse to reinstall the Auto Drawer Gear taking care that the gear teeth are set into
the cavity angle correctly.
Fig. G-1
RACK GEAR REMOVAL
1.
2.
3.
4.
5.
7.
Follow the Microwave Drawer disassembly as previously stated.
Open the drawer and keep it open.
To discharge the high voltage capacitor, wait for 60 seconds.
Remove the Microwave Drawer by following steps 1, 2, 5, 8, 9 & 10 as instructed under
"DRAWER ASSEMBLY AND CHOKE REMOVAL".
Remove the (3) screws holding the Rack Gear to the bottom slide rail (Fig. G-2).
Proceed in reverse to reinstall the new Rack Gear.
Fig. G-2
46
KB-3425LS/K/W
KB-4425LS/K/W
OVEN DOOR REMOVAL
OVEN DOOR ASSEMBLY REMOVAL
1. Disconnect the power supply cord.
2. Open the door to the fully opened position (Fig. O-1).
3. Pull the lock located on both hinge supports up and engage in the hook
of the hinge levers. You may have to apply a little downward pressure
on the door to pull the locks fully over the hooks (Fig. O-2).
4. Grab the door by the sides, pull the bottom of the door up and toward
you to disengage the hinge supports. Keep pulling the bottom of the
door toward you while rotating the top of the door toward the range to
completely disengage the hinge levers (Fig. O-3).
5. Proceed in reverse to reinstall the door.
6. Make sure the hinge supports are fully engaged before unlocking the
hinge levers.
OVEN DOOR RECEPTACLE HINGE AND HINGECOVER
REPLACEMENT
1.
2.
3.
4.
5
Fig. O-1
Fig. O-2
Disconnect the power supply cord.
Refer to the disassembly instructions as previously stated.
Remove (2) screws from Hinge Cover (Fig. O-4)
Remove Hinge Receptacle.
Proceed in reverse to reinstall the Hinge Receptacle and Hinge
Cover.
Fig. O-3
Fig. O-4
Recepticle Hinge
Recepticle Hinge
Hinge Cover
47
KB-3425LS/K/W
KB-4425LS/K/W
OVEN BAKE ELEMENT REMOVAL
1.
2.
3.
4.
5.
6.
Disconnect the power supply cord.
Refer to the disassembly instructions as previously stated.
Disconnect the wires by removing (2) nuts from element (Fig. O-5)
Remove the (2) screws holding the element from inside the oven (Fig. O-6).
Pull the Element into the oven.
Proceed in reverse to reinstall the Bake Element.
Fig. O-5
Fig. O-6
OVEN BROIL ELEMENT REMOVAL
1.
2.
3.
4.
5.
6.
Disconnect the power supply cord.
Refer to the disassembly instructions as previously stated.
Disconnect the wires by removing (2) nuts from element (Fig. O-7)
Remove the (2) screws holding the element from inside the oven (Fig. O-8).
Pull the Element into the oven.
Proceed in reverse to reinstall the Broil Element.
Fig. O-8
Fig. O-7
THERMISTOR REMOVAL
1.
2.
3.
4.
5.
6.
7.
Disconnect the power supply cord.
Refer to the disassembly instructions as previously stated.
Unhook rear Molex wiring from Thermistor (Fig. O-9)
Remove tape from Thermistor rear hole.
Remove the (2) screws holding the Thermistor from inside the oven (Fig. O-10).
Pull the Thermistor into the oven.
Proceed in reverse to reinstall the Thermistor.
Fig. O-10
Fig. O-9
48
KB-3425LS/K/W
KB-4425LS/K/W
BLOWER MOTOR REMOVAL
1.
2.
3.
4.
5.
6.
7.
Disconnect the power supply cord.
Refer to the disassembly instructions as previously stated.
Unhook all wiring from Blower Motor (Fig. O-11)
Remove tape from Thermistor rear hole.
Remove the (2) screws holding the Blower Motor to the Rear Plate.
The Blower Motor is now free.
Proceed in reverse to reinstall the Blower Motor.
Fig. O-11
LOCK MOTOR REMOVAL
1.
2.
3.
4.
5.
6.
7.
Disconnect the power supply cord.
Refer to the disassembly instructions as previously stated.
Unhook all wiring from Lock Motor (Fig. O-12).
Remove the (2) screws holding the Lock Motor to the Rear Plate.
Pull Lock Motor from Lock Motor Shaft.
The Lock Motor is now free.
Proceed in reverse to reinstall the Lock motor.
Fig. O-12
49
KB-3425LS/K/W
KB-4425LS/K/W
CONVECTION MOTOR/IMPELLER BLADE REMOVAL
1. Disconnect the power supply cord.
2. Refer to the disassembly instructions as previously stated.
3. Unhook all wiring from convection Motor (Fig. C-16).
4. Remove the (8) screws holding the convection cover on from inside the oven (Fig. C-13).
5. Remove the (2) screws holding the convection heater in place (if necessary) (Fig. C-14).
6. Unscrew the convection fan nut by turning it clockwise (Fig. C-14).
7. Once the convection blade is removed, unscrew the (4) screws holding the convection motor in place (Fig. C-15).
8. The Lock Motor is now free.
9. Remove the "E" retaining clip and (2) washers holding the impeller blade on to the convection motor shaft (Fig. C16).
(Fig. C-13)
(Fig. C-14)
(Fig. C-16)
(Fig. C-15)
50
KB-3425LS/K/W
KB-4425LS/K/W
COOK TOP RADIANT HEATERS/HOT SURFACE INDICATOR REMOVAL
1. Disconnect the power supply cord.
2. Refer to the disassembly instructions as previously stated.
3. After Cook Top Assembly is free, turn upside down (glass side down) on a protective surface to prevent
scratching (Fig. O-13).
4. Remove the (10) screws from Bottom Plate and place to the side.
5. Remove Heater Protect Cover (Fig. O-14).
6. Remove necessary spring strap from Radiant Element.
7. Unhook Radiant Element or Hot Surface Indicator wiring.
8. The Radiant Elements are now free.
9. Proceed in reverse to reinstall the Radiant Elements and/or Hot Surface Indicator.
Fig. O-13
Fig. O-14
51
52
WHT
BLK
WHT
H1(RR)
H1(LF)
H1(LR)
WHT w/BRN STRIPE or BRN
H2(LF)
WHT
WHT
4a(RF)
WHT w/YLW STRIPE or YLW
RED
4 (RF)
H2(RR)
WHT
L2
WHT w/BRN STRIPE or BRN
BLK
L1
2 (RF)
H2(LR)
VLR-12V
1
2
3
4
5
6
7
8
9
10
11
12
(TO COOKTOP HARNESS)
L1
(RR)
ORG
L2
(RR)
RED
L1
(LR)
H1
(RR)
BLK
P
(RR)
RED
P
BLK
P2
(RF)
PILOT LIGHT LEFT
YLW
GRN
YLW
S2
(RF)
S1
(RF)
INFINITE SWITCHES (LEFT SIDE)
P
(LR)
H2
YLW
RED
RED
(LR)
L2
H1
WHT
w/BRN
STRIPE
or
BRN
P
(LR)
WHT
YLW
orWHT
w/YLW YLW
STRIPE
YLW
L2
(LR)
BLK
WHT
H2
(RR)
PILOT LIGHT RIGHT
INFINITE SWITCHES (RIGHT SIDE)
L2
RED
RED
P1
(RF)
YLW
(LF)
P
YLW
GRN
WHT
RED
P1
(RF)
L1
(LF)
ORG
BLK
RED
RED
1
2
3
4
5
6
JST VLR-06V
4
(RF)
L1
L1
L2
L2
L2
BLK
BLK
RED
RED
RED
L2
(LF)
BLK
L1
BLK
or
WHT
w/BRN
STRIPE
RED
POWER CORD
WHT
4a
(RF)
BRN
H1
(LF)
WHT
2
(RF)
H2
(LF)
KB-3425LS/K/W
KB-4425LS/K/W
CONTROL PANEL WIRING DIAGRAM
53
BLK
WHT
RED
WHT
WHT
BLK
WHT
BRN
YLW
WHT
BRN
WHT
YLW
TO DRAWER HARNESS
(JST ELP-02V)
L1
L2
4 (RF)
4a(RF)
H1(RR)
H1(LF)
H1(LR)
H2(RF)
H2(RR)
H2(LF)
H2(LR)
TO INFINITE SW HARNESS
(JST VLP-12V)
1
2
1
2
3
4
5
6
7
8
9
10
11
12
BLU
RF
WHT
L2
LF
YLW
LR
BLK
SURFACE LAMPS
RR
BRN
2b
BLU
BRN
2a
P1
BLK
YLW
YLW
RED
P1B
1 ZONE
LEFT FRONT
(LF)
SMALL
1b
YLW
YLW
YLW
BLU
1b
2a
WHT
BLU
BLK
2b
2 ZONE
RIGHT FRONT
(RF)
LARGE
WHT
P1A
2b
BLK
BLU
BLK
BLU
2b
P1
WHT
YLW
YLW
BRN
1b
1 ZONE
LEFT REAR
(LR)
LARGE
1b
YLW
BLK
YLW
WHT
P1
1 ZONE
RIGHT REAR
(RR)
SMALL
2a
BRN
YLW
2a
P1 WHT
2a YLW
1 ZONE
CENTER REAR
(CR)
WARMER
COOK TOP WIRING DIAGRAM
KB-3425LS/K/W
KB-4425LS/K/W
1
2
(COM.)(N.O.)
WHT GRN
STOP SW
EX
1 2 3 4 5
TO CPU CNN
(JST XAP-05V-1)
RED
1
ORG
2
BLU
3
YLW
4
5
BLK
WHT
YLW
WHT
GRN
GRY
BRN
1 2 3 4
DC MOTOR
(JST XMR-05V)
EX
EX
(COM.) (N.O.)
BRN
GRY
DOOR POSITION SWITCH
WHT
RED ORG
EX EX
BRN
RED
BRN
BLK
(COM.) (N.O.)
SECONDARY INTERLOCK
SWITCH
EX
EX
WHT
EX
RED
RED
RED
(N.O.) (COM.)
RY-2
EX
RED
1 2 3
EX
ORG
RED
ORG
(N.O.) (COM.)
RY-1
EX
BLK
NOISE FILTER
BLK
EX
BLK
EX
BLK
BLK
EX
TO "N"
RED
EX
TO "L"
1 2 3 4 5 6 7
RED
EX
TO "WHT" TO "RED"
(COM.) (N.O.)
RY-3
EX
BLK
EX
RED
FAN MOTOR
BLK
RY-4
(COM.) (N.O.)
RED BRN
EX
EX
TO PWB CNC
(JST VHR-7N)
YLW
TO PWB CNB
(JST VHR-3N)
GRN
EX
BRN
MONITOR SW
(COM.) (N.C.)
BRN
RED
TO OVEN HARNESS
(JST VLP-12V)
1 2 3 4 5
EARTH
TO PWB CND
(JST VHR-5N)
TO PWB CNE
(JST VHR-7N)
1 2 3 4
(JST VHR-3N)
(JST VHR-4N)
TO SWITCHING REGULATOR
RY-B
(FOR BOTTOM HEATER)
ORG RED BRN BLU WHT
(COM)(N.O.) (N.C.)
1 2 3 4 5 6
TO OVEN HARNESS
(JST VLP-06V)
(L1) (N) (L2)
BLK
WHTWHT
RED WHT
RED
BLK
BRN
1 2 3 4 5 6 7
1 2 3 4 5 6 7 8 9 10 11 12
BLK
OVEN THERMAL
CUT-OUT
YLW
TO COOKTOP
HARNESS
(JST ELR-02VF)
ORG
STIRRER
MOTOR
ORG WHT
ORG WHT
RED
BLK
GRN
RED
OVEN LAMP
BLK
RED
GRY
WHT
RED BLK ORG
(COM)(N.O.) (N.C.)
RED
EX
BLK
MG THERMAL
CUT-OUT
ORG ORG
EX
RED
HVT
(BACK) (CENTER) (FRONT)
RY-C
(FOR CONVECTION HEATER)
WHT GRY
WHT
1 2 3
BLK
TO CPU HARNESS
(JST XMR-04V)
ORG
BLK RED
RED
BLK
ORG
RED
BRN
RED
BLK
BLK
YLW
RED
WHT
BLU
WHT
54
RED
BLK
ORG
YLW
BLU
HOUSING COLOR : BLUE
KB-3425LS/K/W
KB-4425LS/K/W
MICROWAVE DRAWER WIRING DIAGRAM
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
TO PWB CNH
(JST XAP-15V-1)
EX
BLK
(COM)
EX
BLK
(N.O.)
DOOR POSITION SWITCH-REAR
UL TAPE
TO OVEN HARNESS
(JST XMP-07V)
TO CPU CNM
(JST XAP-14V-1)
1
TO CPU CNK
(JST XAP-15V-1)
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
1 2 3 4 5 6 7 8 9 10 11 12 13 14
WHT
BLK
BLK
BLK
BLK
BLK
1 2 3 4 5 6 7
1
2
3
4
5
6
ORG
ORG
BLK
RED
BRN
RED
YLW
1
2
3
4
5
6
WHT
WHT
BLK
BLK
BLK
BLK
BLK
TO CPU CNL
(JST XAP-06V-1)
GRN
BLK
RED
GRY
BRN
BRN
RED
YLW
ORG
ORG
BLK
BLK
TO PWB CNJ
(JST XAP-06V-1)
1 2 3 4
WHT
GRY
GRY
GRY
GRY
GRY
GRY
GRY
GRY
GRY
GRY
GRY
GRY
GRY
GRY
55
WHT
GRY
GRY
GRY
GRY
GRY
GRY
GRY
GRY
GRY
GRY
GRY
GRY
GRY
GRY
WHT
GRN
GRY
BRN
TO DRAWER HARNESS
(JST XMP-04V)
MICROWAVE DRAWER CPU WIRING DIAGRAM
KB-3425LS/K/W
KB-4425LS/K/W
56
(RIGHT)
(L2)
(LEFT)
(L1)
TERMINAL
RED
BLK
UL TAPE
NO.07
NO.08
SHRINK TUBE
(VERSAFIT V2)
BLK
BLK
BLK
BLK
RED
RED
RED
RED
1 2 3 4 5 6
(JST VLP-6V)
INFINITE SWITCH HARNESS
BLK
BLK
BLK
RED
RED
RED
KB-3425LS/K/W
KB-4425LS/K/W
RANGE POWER SUPPLY WIRING DIAGRAM
BLK
BLK
(LEFT)
(L1)
57
TERMINAL
WHT
RED
WHT
RED
(CENTER) (RIGHT)
(N)
(L2)
ORG
EX
OVEN LAMP
WHT
WHT
EX
2
LOCK MOTOR
BRN
BRN (COM)
1
WHT
WHT
3
(N.O.)
RED
VOLTAGE
SWITCH
(N.C.)
BLK
YLW
(COM)
BLK
BLK
RED
(N.O.)
TOP HEATER
RED
BRN
(N.C.)
2
3
(JST ELP-03V)
CONVECTION
MOTOR
1
BLU
EX
EX
RED
RED
BLU
RED
CAPACITOR
BLK
EX
LOCK MOTOR
SWITCH
5
1
RED BLK
BLK
BLK
BLK
CONVECTION
HEATER
6
4
3
BLK
WHT
RED
2
RED
BLK
BRN
1
4
ORG
6
RED
5
RED
BRN
BOTTOM
HEATER
BLK
UL TAPE
3
RED
BLK
2
8
9
YLW
UL TAPE
10 11 12
RED RED
WHT
2
1
ORG
ORG
THERMISTOR
(MOLEX 5559-02P)
7
BLK
BLK
TO DRAWER HARNESS
(JST VLR-12V)
RED
TO DRAWER HARNESS
(JST VLR-06V)
(COM.)
DOOR SW
UL TAPE
RED
(N.O.)
BLK
CROSS FLOW
FAN MOTOR
EX
WHT
WHT
EX
YLW
UL TAPE
UL TAPE
YLW
7
RED
RED
EX
EX
OVEN THERMAL
CUT-OUT
BRN
RED
5
6
BLK
RED
ORG
2
3
4
ORG
1
TO CPU HARNESS
(JST XMR-07V)
4 VOLTAGE SW (N.O.)
5 VOLTAGE SW (N.C.)
6 VOLTAGE SW (COM)
THERMISTOR
THERMISTOR
DOOR SW (COM)
DOOR SW (N.O.)
LOCK MOTOR SW (N.C.)
LOCK MOTOR SW (N.O.)
LOCK MOTOR SW (COM)
1 L1 / OVEN TEMP.FUSE(L1)
2 OVEN TEMP.FUSE(L1)
3 TOP HEATER(L1)
4 OVEN LAMP(L1)
5 TOP HEATER(L2)
6 DOOR LOCK MOTOR(L1)
7 BOTTOM HEATER(L2)
8 CONVECTION MOTOR(L1)
9 CONVECTION HEATER(L2)
10 FAN MOTOR(L1)
11 L2 / CONVECTION MOTOR(L2)
12 DOOR LOCK MOTOR(N)
TO DRAWER HARNESS
(JST VLR-12V)
1
2
3
4
5
6
7
TO CPU HARNESS
(JST XMR-07V)
1 L1
2 N
3 L2
TO DRAWER HARNESS
(JST VLR-06V)
RANGE WIRING DIAGRAM
KB-3425LS/K/W
KB-4425LS/K/W
KB-3425LS/K/W
KB-4425LS/K/W
2
1
4
3
6
5
Transformer
CN-A
RTRNPA006WRZZ
D1 -- D4
1N4002L x4
A-1
CN-H
A
A
2200uF/35V
+
C2
C1
A-2
0.1uF/50V
H-1
H-2
A-6
VRS1
H-3
A-4
B
B
10G471K
ZD1
RY2
POWER
TRANSFORMER
HZ20-1
Q1
KTC1027
D5
DU18D1-1P(M)-R-S
RY1
(DRAWER COM.)
R2
D7
RY3
(OVEN COM.)
DU18D1-1P(M)-R
RY4
D8
TOP H.
DU18D1-1P(M)-R
D10
RY6
C-3
H-10
RY7
C-5
H-11
RY8
G
(COOK TOP)
RY9
: IF NOT SPECIFIED, 1SS270A
D-5
CN-J
CN-D
J-6
J-5
J-4
RY10
D-3
J-3
J-1
H-14
D-1
D18
RY5 -- 10
FTR-F3AA024E
D15
D16
D17
G
RY11
WARMER
CN-C
<NOTE>
H-12
H-13
CONV M
C-7
D14
(OVEN)
F
H-15
D12
F
LOCK
MOTOR
E
D11
OL
H-8
H-9
(OVEN)
(OVEN)
R4
150
1W
C-1
(DRAWER)
FM
H-7
150
1W
D13
FM
D
R3
D9
RY5
E
H-6
150
1W
DU18D1-1P(M)-R
D
H-4
H-5
D6
OL,SM
C
J-2
C
CN-B
R1
B-1
1.5K 1/4W
AC 120V
60Hz
2.5A
FUSE
B-3
H
BOTTOM
HEATER
RELAY.
CONVECTION +24V
HEATER
RELAY.
E-1
E-2
E-3
E-4
E-5
E-6
E-7
CN-E
H
0V
Figure S-2. Power Unit Circuit
1
2
4
3
58
5
6
KB-3425LS/K/W
KB-4425LS/K/W
2
1
4
3
5
6
A
B
B
10KF
A
C
Figure S-3. Control Unit Circuit
750
C
D
E
D
E
F
F
G
G
H
H
1
2
4
3
59
5
6
KB-3425LS/K/W
KB-4425LS/K/W
1
2
4
3
5
6
B
B
1
C
6
CNJ
CNE
ZZRD448AFBWPQ
7
1
D16
D17
D15
A
S047081
A
1
D14
RY10
C2
6
D18
5
1
D2
D1
D3
C1
VRS1
R1
D
CNH
D7
RY3
R3
DIP
FUSE 2.5A
15
RY9
ZD1
D13
D4
RY11
CNA
CND
FA844
D
C
2
E
CNB
3
1
D8
D10
1
R4
R2
C
E
CNC
D11
E
1
Q1 D12
7
B
RY7 RY8
D9
D5
RY6 RY5
RY4
F
RY1
F
3
RY2
D6
G
G
H
H
Figure S-4. Printed Wiring Board of Power Unit
1
2
4
3
60
5
6
Q7
C23
R40
C5
C8
Q4
C14
D40
I C O
D41
R52
R41 R50
R42
C6
R7
ZD2
R96
R95
D97
R97
D21
D22
R123
C106
R124
R126
C107
R125
C111
R130
R129
I C O
C4
D40
C41
D96
Q95
R98 R18
R99
Q97
R16 R16
R17
R131
6
C7
C17
C40
R43
R44
C42
Q21
D20
R58
R57
C52
R54
R53
R64
R66
R67
R65
R62
R63
R61
R60
C43 R51
R45
R46
R47
R48
R49
R56
R55
G8W1
R117
R118
Figure S-5. Printed Wiring Board of Control Unit
E
7
WHA
R30
C16
R32
1
R37
R35
R36
R38
R15
C30
C10
R11
ZD4
R19
C51
C50
C12
C50
R14
R12
C11
R13
1
C29
61
6
5
4
3
8
6
4
2
5
1
14
1
3
1
6
1
B C E
CNN
CNF
CNL
D
LD5
CF1
9
9
K
Q22
R132
R121
C105
R120
C104
R122
R127
R128
C109
R133
LD4
R5
2
1
R109
C102
R110
R112
C103
R111
C110
R116
R115
LD3
Q2
CNM
15
1
R107
C101
R106
C100
R108
R113
R114
C108
R119
LD2
8P
R6
R26
TH1
R27
R28
C18
R27
C28
C27
C26
C25
R31
C19
R29
LD1
R8
C90
C21
B C E
3
8
9
CNX
2
1
E
5
1
IC7
IC8
K
5
IC5
1
QPWBFA851DRZZ
Q23
K
IC3
K
Q20
ZD3
80
D19
K
K
K
K
K
1
100
31
1
Q25
IC1
30
Q24
D95
Q10
R105
C15
Q95
51
R21
R68
81
50
R30
R22
R100
IC2
R101
R102
R103
R104
11
R25
R24
R23
1
1
C20
C60
C63
C62
C61
J11
J10
C45
C44
C9
R9
R10
K
Q6 Q26
IC5 1
C
C13
K
IC9
C
Q5
LCD1
6
5
4
3
2
1
1
LD10
D
C3
KB-3425LS/K/W
KB-4425LS/K/W
A
A
B
B
CNK
F
F
G
G
H
H
KB-3425LS/K/W
KB-4425LS/K/W
2
1
4
3
5
6
A
A
B
B
(Control lock)
1
C
2
3
Stop
Clear
(On/Off)
4
5
6
7
8
9
Stop
Clear
Cook top
Warm
0
Setup
(On)
Oven
Light
Kitchen
Timer
D
START
UPPER
MICROWAVE
Minute
Pluse
OVEN
OPEN
C
CLOSE
Lower
Oven
START
D
(Set Off)
R97
R86
R85
R84
R83
R82
R81
R80
E
E
R89
R71
C74
C70
IC44
44
C70
C80
34
C81
33
C71
C73 CF4
1
23 C76
R74
22 C77
C75
C72
C78
11
12
R76
R72
C75
R73
R77
R90
R93
R91
R92
R78
R79
6
2
F
F
1
CNG
QPWBFA850DRZZ
5
G
G
H
H
Figure S-5. Printed Wiring Board of Keyboard Unit
1
2
4
3
62
5
6
CONTROL PANEL PARTS LIST
Note:The parts marked “∆” may cause undue microwave exposure.
The parts marked “*” are used in voltage more than 250V.
REF. NO.
1- 1
1- 2
1- 3
1- 4
1- 5
1- 6
1- 7
1- 8
1- 9
1-10
1-11
1-12
1-13
1-13
1-14
1-15 1-15 1-16
1-16
1-16
1-17
1-17
1-18
1-18
1-18
1-19
1-19
1-19
1-19
PART NO.
HPNLCB200MRF0
DPWBFB132MRU3
LHLD-B029MRF0
XEPS730P08XS0
LANGQB072MRP0
QSWTEB002MRE0
QSWTEB006MRE0
PLNS-B003MRE0
FW-VZB259MRE0
XBTWW40P06000
XCTSD40P08000
RLMP-B005MRE0
XOTS740P12000
XCTSF50P12000
PSEL-B001MRE0
FUNTKB436MRK0
FUNTKB443MRK0
HDECQB001MRR0
HDECQB056MRR0
HDECQB057MRR0
LRTNPB003MRF0
LRTNPB002MRF0
FKNBKB010MRK0
FKNBKB009MRK0
FKNBKB006MRK0
GWAKPB219MRF0
GWAKPB220MRF0
GWAKPB221MRF0
GWAKPB222MRF0
§
M
M
M
M
M
M
M
M
M
M
M
M
M
M
M
M
M
M
M
M
M
M
M
M
M
M
M M
M "§" mark: Parts Delivery Section
DESCRIPTION
Control panel mold
Control unit
PWB holder
Screw : 3mm x 8mm
Key fixing angle
Double control
Infinite switch
Lens C/P harness
Screw : 8mm x 6mm Screw : 8mm x 8mm Indicator lamp
Screw
Optional oversized screw
Gasket, dark gray
Glass key unit [KB3425LS][KB3425LK][KB4425LS][KB4425LK]
Glass key unit [KB3425LW][KB4425LW]
Glass key deco [KB3425LS] [KB4425LS]
Glass key deco [KB3425LK] [KB4425LK]
Glass key deco [KB3425LW] [KB4425LW]
Retainer [KB3425LS][KB3425LK] [KB4425LS][KB4425LK]
Retainer [KB3425LW] [KB4425LW]
Control knob assy [KB3425LS] [KB4425LS]
Control knob assy [KB3425LK] [KB4425LK]
Control knob assy [KB3425LW] [KB4425LW]
C/P frame [KB3425LS][KB3425LK] C/P frame [KB3425LW] C/P frame [KB4425LS][KB4425LK]
C/P frame [KB4425LW]
63
KB-3425LS/K/W
KB-4425LS/K/W
Q'TY CODE
1
1
1
8
1
1
3
2
1
8
4
2
6
6
1
1
1
1
1
1
4
4
4
4
4
1
1
1
1
AS
CB
AN
AA
AN
AW
AT
AA
BA
AA
AA
AF
AA
AA
AN
BP
BP
AK
AK
AK
AD
AD
AL
AG
AD
BA
BB
BB
BC
KB-3425LS/K/W
KB-4425LS/K/W
2
1
4
3
6
5
CONTROL PANEL
1-18
A
1-17
A
1-14
1-8
1-18
1-16
1-12
B
B
1-17
1-1
1-8
1-10
1-14
C
C
1-15
1-12
1-11
1-12
D
D
1-5
1-12
1-7
1-11
1-7
E
E
1-14
1-3
1-13
1-7
1-2
F
F
1-6
1-19
G
1-4
CONTROL PANEL HARNESS
G
1-13
1-9
H
H
Actual wire harness may be different from illustration.
1
2
4
3
64
5
6
KB-3425LS/K/W
KB-4425LS/K/W
COOK TOP PARTS LIST
Note:The parts marked “∆” may cause undue microwave exposure.
The parts marked “*” are used in voltage more than 250V.
REF. NO.
2- 1
2- 2
2- 3
2- 4
2- 5
2- 6
2- 6
2- 6
2- 6
2- 7
2- 8
2- 9
2-10
2-11
2-12
2-13
2-14
2-14
2-14
2-15
2-16
2-17
2-18
2-19
2-20
2-20
2-21
2-21
PART NO.
§
FW-VZB303MRE0
RLMP-B001MRE0
RHET-B001MRE0
RHET-B002MRE0
RHET-B003MRE0
FANG-B027MRY0
FANG-B028MRY0
FANG-B030MRY0
FANG-B031MRY0
PFPF-B009MRE0
PCOVPB158MRP0
MLEVPB018MRE0
MLEVPB020MRE0
MLEVPB021MRE0
XOTS740P12000
LX-CZB027MRE0
HDEC-B038MRY0
HDEC-B034MRT0
HDEC-B035MRT0
RHET-B012MRE0
MLEVPB019MRE0
LANG-B040MRT0
PCUSGB075MRP0
LX-CZA084WRE0
HDECAB353MRT0
HDECAB355MRT0
HDECAB352MRT0
HDECAB354MRT0
M
M
M
M
M
M
M
M
M
M
M
M
M
M
M
M
M
M
M
M
M
M
M
M
M
M
M
M
"§" mark: Parts Delivery Section
DESCRIPTION
Cook top harness
Surface indicator
Radiant heater (2000 w)
Radiant heater (1200 w)
Radiant heater (Dual)
Cook top glass assy [KB3425LS] [KB3425LK]
Cook top glass assy [KB3425LW]
Cook top glass assy [KB4425LS] [KB4425LK]
Cook top glass assy [KB4425LW]
Heat protect
Heat protect cover 6" spring strap
8" spring strap 9" spring strap Screw
Shoulder screw
Backsplash [KB3425LS]
Backsplash [KB3425LK]
Backsplash [KB3425LW]
Radiant heater warm
7" spring strap Backsplash support Glass cushion Screw Cook top deco L [KB3425LS] [KB3425LK]
Cook top deco L [KB3425LW]
Cook top deco R [KB3425LS] [KB3425LK]
Cook top deco R [KB3425LW]
65
Q'TY CODE
1
1
1
2
1
1
1
1
1
1
1
2
1
1
25
4
1
1
1
1
1
1
1
8
1
1
1
1
AY
AU
BA
AZ
BD
CA
CA
CC
CC
AH
AP
AH
AH
AH
AA
AA
BV
BS
BS
BB
AK
AV
AK
AA
AQ
AQ
AQ
AQ
KB-3425LS/K/W
KB-4425LS/K/W
2
1
4
3
6
5
2-21
A
A
KB3425L
KB4425L
2-6
2-12
2-19
B
B
2-6
Rear view
2-12
Rear view
2-20
C
C
2-19
2-14
2-2
2-12
2-4
D
Front view
D
2-17
2-5
2-9
2-3
2-11
2-12
E
E
2-10
2-15
2-4
2-16
2-9
F
F
2-7
COMMON PARTS
2-18
G
G
2-13
2-1
2-12
H
2-8
2-13
Actual wire harness may be different from illustration.
2-12
1
2
4
3
66
5
6
H
MICROWAVE DRAWER PARTS LIST
Note:The parts marked “∆” may cause undue microwave exposure.
The parts marked “*” are used in voltage more than 250V.
REF. NO.
∆
*
3- 1
3- 2
3- 3
3- 4
3- 5
3- 6
3- 7
3- 8
3- 9
3-10
3-11
3-12
3-13
3-14
3-15 3-16
3-17
3-18
3-19
3-20
3-21
3-22
3-23
3-24
3-25
3-26
3-27
3-28
3-29
3-30
3-31
3-32
3-33
3-33
3-33
3-34
3-35
3-36
3-37
3-38 3-39
3-40
3-41
3-42
3-43
3-44
3-45
3-46
3-47
3-48
3-49
3-50
3-51
3-52
3-53
3-54
3-55
3-56
3-57
PART NO.
§
RTRN-B083MRE0 M
RV-MZA288WRE0 M
FDTCTA234WRKZ M
FFS-BA018/KIT M
RTRNPA006WRZZ M
TCAUAB050MRR0 M
LHLD-B028MRF0A M
DPWBFB133MRU0 M
LANGTB122MRP0 M
LX-CZ0052WRE0 M
GCABDB001MRP0 M
PDUC-B141MRP0 M
PDUC-B142MRP0 M
PDUC-B147MRP0 M
PDUC-B148MRP0 M
FCOVPB002MRY0 M
PCLICB003MRE0 M
MSLIFB001/KIT M
LANGTB120MRT0 M
LANGTB187MRP0 M
GCOVHB051MRF0 M
PSKR-B018MRP0 M
PFILWB005MRP0 M
LANGTB076MRP0 M
FC-QZB048MRK0 M
LBNDKB007MRP0 M
LX-BZA041WRE0 M
XOTS740P12000 M
LANGTB156MRP0 M
LANGQA581WRPZ M
XJTS740P16000 M
XOTSD40P12RV0 M
DDORFB099MRK0 M
DDORFB100MRK0 M
DDORFB104MRK0 M
PSHEPB184MRE0 M
FFAN-B008MRK0 M
FANGTB010MRK0 M
FANGTB011MRK0 M
LANGTB088MRP0 M
LANGTB094MRP0 M
RRLYDA012DRZZ M
LX-NZB006MRE0 M
XHTS740P08RV0 M
TCAUKB001MRR0 M
FMOTEA494WRKZ M
LANGTB155MRP0 M
RTHM-A135WRZZ M
FW-VZB310MRK0 M
PHOK-A079WRF0 M
QSW-MA085WRE0 M
PHOK-A080WRF0 M
MLEVPA214WRF0 M
QSW-MA---WRE0 M
QSW-MA085WRE0 M
QSOCLB010MRE0 M
FW-VZB263MRE0 M
FPWBFA380WRKZ M
RLMPTA093WRZZ M
DESCRIPTION
KB-3425LS/K/W
KB-4425LS/K/W
"§" mark: Parts Delivery Section
Q'TY CODE
Transformer
1
Magnetron
1
Sensor assy
1
Monitor switch (V-16G-2C25) with fuse (20A) assembly
1
Touch control transformer
1
Monitor caution label
2
Power supply unit holder
1
Power supply
2
Oven lamp angle
1
Screw/washer
6
Back plate 1
Mag duct
1
Sensor duct
1
Exhaust duct A
1
Exhaust duct B
1
Stir cover assy
1
Canoe clip
3
Slide rail
3
Door support angle A
2
Door support angle B
1
Door support cover
2
Magnetron air guide
1
Lamp filter 1
Partition angle
1
HVC assy
1
HVC band
1
Screw
20
Screw
179
Partition angle L
1
Noise unit angle
1
Screw
4
Power unit assy screw
4
Door assy [KB3425LS] [KB4425LS]
1
Door assy [KB3425LK] [KB4425LK]
1
Door assy [KB3425LW] [KB4425LW]
1
Sealer film 1
Stirrer fan assy
1
Latch angle assy R
1
Latch angle assy L
1
Cooktop stay L
1
Cooktop stay R
1
Heater relay A
2
Cap nut
6
Screw
4
Stirrer cover cleaning label
1
Fan motor
1
Fan motor angle
1
Magnetron thermal cut-out 1
Harness assy
1
Latch hook R
1
Switch
1
Latch hook L
1
Switch lever L
1
Monitor switch - must replace by assy. (3-4)
1
Switch
4
Lamp socket
1
CPU harness
1
Noise filter unit
1
Oven lamp
1
67
BE
BK
AP
AF
AP
AD
AH
BD
AF
AA
BB
AE
AK
AK
AF
AM
AB
AU
AK
AN
AB
AC
AB
AK
AP
AB
AA
AA
AK
AD
AA
AA
BR
BR
BR
AQ
AK
AH
AH
AM
AY
AH
AA
AA
AA
AZ
AG
AD
BE
AH
AE
AF
AK
AE
AE
AG
AV
AM
AF
KB-3425LS/K/W
KB-4425LS/K/W
REF. NO.
3-58 3-58 3-58 3-59
3-60
3-61
3-62
3-63
3-64
3-65
3-66
3-67
3-68
3-69
3-70
3-71
3-72
3-73 3-74 3-75 PART NO.
§
JHNDPB052MRM0
JHNDPB054MRM0
JHNDPB055MRM0
FGLSPB002MRY0
GCOVHB053MRF0
LX-CZB027MRE0
RMOTDA262WRZZ
TCAUHB009MRR0
FANGTB017MRK0
LANGTB105MRP0
MACT-B001MRF0
MACT-B002MRF0
DPWBFC526WRKZ
NGERRB005MRF0
PCUSUB088MRP0
LHLD-B033MRF0
XOTS740P08000
XEPS730P10XS0
PCUSUB084MRP0
PCUSUB086MRP0
M
M
M
M
M
M
M
M
M
M
M
M
M
M
M
M
M
M
M
M
DESCRIPTION
Door handle [KB3425LS] [KB4425LS]
Door handle [KB3425LK] [KB4425LK]
Door handle [KB3425LW] [KB4425LW]
Oven tray assy
Choke cover
Shoulder screw
Stirrer motor
User caution label
Auto drawer gear assy
Switch angle
Actuator R
Actuator L
SW power supply
Rack gear
Cushion
Switch PSU holder
Screw
Screw
Cushion
Cushion
68
Q'TY CODE
1
1
1
1
1
6
1
1
1
2
1
1
1
2
1
1
1
4
1
1
AS
AS
AS
BK
AM
AA
AH
AA
BK
AE
AD
AD
CM
AQ
AC
AE
AA
AA
AG
AA
KB-3425LS/K/W
KB-4425LS/K/W
2
1
4
3
MICROWAVE DRAWER
6
5
MICROWAVE DRAWER HARNESSES
A
A
3-74
3-47
3-55
3-75
3-14
3-28
Actual wire harness may be different from illustration.
3-70
3-73
3-11
3-28
B
B
3-61
3-68
3-28
3-28
3-71
3-28
3-27
3-45
3-3
3-25
3-28
3-27
3-44
3-56
3-42
3-30
3-28
3-54
3-28
3-28
3-13
3-26
3-62
C
3-10
3-48
3-1
3-28
3-29
3-28
3-22
3-7
3-28
3-12
3-28
3-57
3-9
3-24
3-28
3-4
C
3-39
3-28
3-15
3-28
3-28
3-2
3-46
3-49
3-40
3-18
3-63
3-6
3-36
3-61
3-8
3-32
3-28
3-10
3-28
3-52
3-19
3-5
3-41
3-10
D
3-51
3-28
D
3-23
3-50
3-32
3-66
3-53
3-18
3-6
3-42
3-28
3-35
3-65
3-43
3-28
3-37
3-38
3-27
3-16
3-28
3-18
3-10
3-42
E
3-28
3-17
3-42
E
3-32
3-28
3-67
3-21
3-20
3-41
3-41
3-19
3-65
3-72
3-64
3-60
3-21
3-69
3-33
F
F
3-34
3-28
G
G
3-31
3-28
3-58
H
H
3-31
3-59
1
2
4
3
69
5
6
KB-3425LS/K/W
KB-4425LS/K/W
OVEN PARTS LIST
Note:The parts marked “∆” may cause undue microwave exposure.
The parts marked “*” are used in voltage more than 250V.
REF. NO.
4- 1
4- 2
4- 3
4- 4
4- 5
4- 6
4- 7
4- 8
4- 9
4-10
4-11
4-12
4-13
4-14
4-15 4-16
4-17
4-18
4-19
4-20
4-21
4-22
4-23
4-24
4-25
4-26
4-27
4-28
4-29
4-30
4-31
4-32
4-33
4-34
4-35
4-36
4-37
4-38 4-39
4-40
4-41
4-42
4-43
4-44
4-45
4-46
4-47
4-47
4-48
4-48
4-49
4-50
4-51
4-52
4-53
4-54
4-55
4-56
4-57
4-58
4-59
4-60
4-61
PART NO.
§
PCUSGB050MRP0 M
PCUSGB051MRP0 M
XWHSD80-16180 M
PCOVPB136MRP0 M
GLEGPB006MRE0 M
PFPF-B012MRE0 M
PFPF-B009MRE0 M
FHNG-B052MRE0 M
PCOVPB131MRE0 M
PPIPFB001MRE0 M
MROD-B008MRE0 M
LBSHZB001MRE0 M
MSPRTB024MRE0 M
LANGTB079MRP0 M
PCOVPB127MRE0 M
QSOCLB012MRE0 M
LANG-B018MRE0 M
LBNDKB011MRE0 M
FMOTEB051MRE0 M
QSW-PB002MRE0 M
FH-HZB001MRE0 M
RLMPTB001MRE0 M
LANGQB065MRP0 M
PCOVPB130MRP0 M
FSW-MB040MRK0 M
LANGKA760WRP0 M
XOTS740P12000 M
TCAUAB073MRR0 M
GCABDB009MRP0 M
QCNCYB001MRE0 M
FANG-B003MRE0 M
LANGQB066MRP0 M
LX-BZA041WRE0 M
TCAUAB057MRR0 M
XTTSD40P30000 M
LBNDKB012MRP0 M
RHET-B006MRE0 M
RHET-B009MRE0 M
XOTWW40P10000 M
FW-VZB273MRE0 M
LANGTB092MRP0 M
DW-VZB193MRK0 M
QFS-TA038WRE0 M
LX-NZB007MRE0 M
LX-CZB038MRE0 M
PCOVWB001MRE0 M
GCABUB135MRP0A M
GCABUB138MRP0A M
GCABUB136MRP0A M
GCABUB139MRP0A M
PREFHB008MRP0 M
PDUC-B143MRH0 M
FFAN-B017MRY0 M
RMOTEB036MRE0 M
RHET-B005MRE0 M
LX-NZB009MRE0 M
NFANPB007MRE0 M
LX-RZB001MRE0 M
PCOVPB145MRF0 M
PFPF-B014MRP0 M
PCUSUB087MRP0 M
PPIPFB003MRE0 M
PFIL-B012MRE0 M
DESCRIPTION
Thermal cushion
Cross flow motor cushion
Washers Heat cover
Leveling screw
Heat protect R
Heat protect Top
Receptacle hinge
Hinge cover
Vent tube
Latch rod Bushing
Bushing spring
Oven spring
Oven light cover
Oven light housing
Oven light receptacle
Light cover retainer
Blower motor
Light switch
Thermister
Oven lamp
Power cord angle Power cover
Select switch assy
Switch lever
Screw
DHHS caution label
Rear plate
Terminal block kit
Latch motor assy
Ground plate
Screw
Anti-tip label Terminal screws
Element support hanger
Top heater (3000 W)
Bottom heater (2600 W)
Screw
Power supply harness
Motor blower angle
Harness assy
Oven thermo
Terminal block nut
Door hinge screw
Insulation tube Side cabinet R [KB3425LS][KB3425LK]
Side cabinet R [KB3425LW]
Side cabinet L [KB3425LS][KB3425LK]
Side cabinet L [KB3425LW]
Heat reflector Convection duct Convection fan assy Convection motor Convection heater Convection fan assy nut Impeller blade "E" retaining clip Front cover Insulation Cushion Vent tube adapter Catalyst 70
"§" mark: Parts Delivery Section
Q'TY CODE
1
1
2
1
4
1
1
2
2
1
1
1
1
2
1
1
1
1
1
1
1
1
1
1
1
1
37
1
1
1
1
1
20
1
2
2
1
1
8
1
1
1
1
6
4
1
[KB4425LS][KB4425LK] 1
[KB4425LW]
1
[KB4425LS][KB4425LK]
1
[KB4425LW]
1
2
1
1
1
1
1
1
1
1
1
1
1
1
AG
AG
AB
BD
AE
AW
AW
AK
AD
AR
AM
AG
AA
AE
AK
AE
AH
AB
BF
AF
AT
AS
AE
AG
AS
AG
AA
AB
BE
AK
AZ
AD
AA
AA
AA
AD
AX
AW
AA
BB
AH
BE
AK
AA
AA
AC
BC
BC
BC
BC
AL
AY
AX
BB
AX
AA
AC
AB
AM
AG
AE
AR
AW
KB-3425LS/K/W
KB-4425LS/K/W
2
1
4
3
6
5
OVEN UNIT
OVEN UNIT HARNESSES
A
A
4-42
4-40
Actual wire harness may be different from illustration.
B
B
4-34
4-28
C
C
4-26
4-27
4-27
4-59
4-27
4-47
4-49
4-27
4-24
4-25
D
4-2
4-27
4-10
4-39
D
4-31
4-1
4-17
4-19
4-27
4-33
4-23
4-32
4-35
4-41
4-4
4-30
4-44
4-39
4-43
4-58
4-11
4-13
4-27
4-12
4-14
4-55
4-56
4-39
4-27
4-27
4-21
4-39
E
4-39
4-46
4-3
E
4-20
4-61
4-52
4-48
4-29
4-60
4-6
4-39
4-16
4-8
4-49
4-22
4-9
4-15
4-7
4-45
F
4-18
4-27
4-8
F
4-39
4-9
4-45
4-53
4-37
4-57
4-51
4-54
4-39
4-27
G
4-39
4-36
G
4-38
4-39
x8
4-5
4-50
H
H
1
2
4
3
71
5
6
KB-3425LS/K/W
KB-4425LS/K/W
OVEN DOOR PARTS LIST
Note:The parts marked “∆” may cause undue microwave exposure.
The parts marked “*” are used in voltage more than 250V.
REF. NO.
555555555-
1
1
1
2
3
3
3
4
5
PART NO.
§
DDORFB107MRK0
DDORFB106MRK0
DDORFB105MRK0
PPACGB021MRE0
JHNDPB053MRF0
JHNDPB056MRF0
JHNDPB057MRF0
XOTWW40P10000
XOTS740P12000
M
M
M
M
M
M
M
M
M
"§" mark: Parts Delivery Section
DESCRIPTION
Door assy [KB3425LS] [KB4425LS]
Door assy [KB3425LK] [KB4425LK]
Door assy [KB3425LW] [KB4425LW]
Oven door seal gasket
Door handle [KB3425LS] [KB4425LS]
Door handle [KB3425LK] [KB4425LK]
Door handle [KB3425LW] [KB4425LW]
Screw
Screw
72
Q'TY CODE
1
1
1
1
1
1
1
2
2
BY
BY
BY
AW
BB
BB
BB
AA
AA
KB-3425LS/K/W
KB-4425LS/K/W
1
2
4
3
6
5
OVEN DOOR
A
A
5-2
B
B
C
C
5-1
D
D
E
E
5-5
F
F
5-4
G
G
5-3
5-4
H
H
1
2
4
3
73
5
6
KB-3425LS/K/W
KB-4425LS/K/W
PACKING PARTS LIST
Note:The parts marked “∆” may cause undue microwave exposure.
The parts marked “*” are used in voltage more than 250V.
REF. NO.
6666666666-
1
2
3
4
5
5
6
7
8
9
PART NO.
§
DESCRIPTION
UAMI-B018MRM0 M
PSLD-B001MRE0 M
PSRAHB001MRE0 M
TINSEB437MRK0 M
TINSEB438MRR0 M
TINSEB455MRR0 M
FAMI-B007MRK0 M
FANGKB024MRK0A M
TINSEB392MRR0 M
UAMI-B017MRM0 M
Rack
Broiler pan insert
Broiler pan
Operation manual
Installation sheet [KB3425L]
Installation sheet [KB4425L]
Extended rack assy
Anti-tip kit
Anti-tip template
Broiler pan rack
74
"§" mark: Parts Delivery Section
Q'TY CODE
1
1
1
1
1
1
2
1
1
1
AS
AW
AW
AM
AD
AE
BM
AV
AD
AR
KB-3425LS/K/W
KB-4425LS/K/W
PACKING
PACKING CASE
KB-3425L Shown
SUPPORT CORNERS
6-2 BOILER INSERT
6-3 BOILER PAN
6-8 ANTI-TIP TEMPLATE
6-4
OPERATION MANUAL
6-5 INSTALLION MANUAL
6-7 ANTI-TIP KIT
6-6
6-1
Non-replaceable items
6-9
EXTENDED RACK ASSY x 2
OVEN RACK
BOILER PAN RACK
75
KB-3425LS/K/W
KB-4425LS/K/W
COPYRIGHT © 2006 BY SHARP CORPORATION
ALL RIGHTS RESERVED.
No part of this publication may be reproduced,
stored in retrieval systems, or transmitted
in any form or by any means, electronic,
mechanical, photocopying, recording, or
otherwise, without prior written permission
of the publisher.
2006 SHARP CORP. (5R2.00E) Printed in U.S.A
76