SHARP 3300J SM, KB-3300JK, KB-3300JW Service Manual
SERVICE MANUAL
S74R243KB330J
FREE STANDING RANGE
WITH MICROWAVE DRAWER
KB-3300JS
KB-3300JK
KB-3300JW
MODELS
KB-3300JS
KB-3300JK
KB-3300JS pictured
In the interest of user-safety the unit should be restored to its original condition and only parts identical to those specified
should be used.
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
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 ............................................................................................................... 1
MICROWAVE MEASUREMENT PROCEDURE ..................................................................................................... 3
FOREWORD AND WARNING ................................................................................................................................5
PRODUCT SPECIFICATIONS ............................................................................................................................... 6
POWER CONNECTION .........................................................................................................................................8
ANTI-TIP DEVICE ............................................................................................................................................... 10
CONTROL LAYOUT ............................................................................................................................................ 11
SCHEMATICS ..................................................................................................................................................... 12
TEST PROCEDURES ..........................................................................................................................................17
TOUCH CONTROL PANEL ASSEMBLY .............................................................................................................28
OVEN/MICROWAVE DRAWER DISASSEMBLY .................................................................................................38
WIRING DIAGRAMS ...........................................................................................................................................47
PRINTED WIRING BOARDS ...............................................................................................................................53
PARTS LIST ........................................................................................................................................................ 58
PACKING AND ACCESSORIES .........................................................................................................................69
KB-3300JW
Page
SHARP ELECTRONICS CORPORATION
This document has been published to be used for after sales service only. The contents are subject to change without notice.
1
KB-3300JS
KB-3300JK
KB-3300JW
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.
2
WARNING TO SERVICE PERSONNEL
Range units contain circuitry capable of producing very high voltage and current, contact
with following parts
(Example)
High Voltage Capacitor, High Voltage Power Transformer, Magnetron, High Voltage
Rectifier Assembly, High Voltage Harness, Heating Elements, etc..
Read the Service Manual carefully and follow all instructions.
Before Servicing
1. Disconnect the power supply cord , and then
remove cabinet.
2. Open the drawer and keep it open.
3. Discharge high voltage capacitor.
WARNING: RISK OF ELECTRIC SHOCK.
DISCHARGE THE HIGH-VOLTAGE
CAPACITOR BEFORESERVICING.
may result in a severe, possibly fatal, electrical shock.
KB-3300JS
KB-3300JK
KB-3300JW
When the testing is completed,
1. Disconnect the power supply cord, and then remove
covers.
2. Open the drawer and keep it open.
3. Discharge high voltage capacitor.
4. Reconnect the leads to the primary of the power
transformer.
5. Reinstall the covers.
6. Reconnect the power supply cord.
7. Run the unit and check all functions.
The high-voltage capacitor remains charged about 60
seconds after the oven has been switched off. Wait for 60
seconds and then short-circuit the connection of the highvoltage capacitor (that is the connecting lead of the highvoltage rectifier) against the chassis with the use of an
insulated screwdriver.
Whenever troubleshooting is performed the power supply
must be disconnected. It may, in some cases, be necessary
to connect the power supply after the outer case has been
removed, in this event:
1. Disconnect the power supply cord, and then remove
neccessary covers.
2. Open the drawer and keep it open.
3. Discharge high voltage capacitor.
4. Disconnect the leads to the primary of the power
transformer.
5. Ensure that the leads remain isolated from other
components and oven chassis by using insulation tape.
6. After that procedure, reconnect the power supply cord.
After repairing
1. Reconnect all leads removed from components during
testing.
2. Reinstall the covers.
3. Reconnect the power supply cord.
4. Run the oven and check all functions.
Microwave ovens should not be operated empty. To test for
the presence of microwave energy within a cavity, place a
cup of cold water on the oven tray, close the drawer and set
the power to HIGH and set the microwave timer for two (2)
minutes. When the two minutes has elapsed (timer at zero)
carefully check that the water is now hot. If the water remains
cold carry out Before Servicing procedure and re-examine
the connections to the component being tested.
When all service work is completed and the oven is fully
assembled, the microwave power output should be checked
and a microwave leakage test should be carried out.
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KB-3300JK
KB-3300JW
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.
2
KB-3300JS
KB-3300JK
KB-3300JW
MICROWAVE MEASUREMENT PROCEDURE
A. Requirements:
1) Microwave leakage limit (Power density limit): The power density of microwave radiation emitted by a microwave oven
should not exceed 1mW/cm2 at any point 5cm or more from the external surface of the oven, measured prior to acquisition
by a purchaser, and thereafter (through the useful life of the oven), 5 mW/cm2 at any point 5cm or more from the external
surface of the oven.
2) Safety interlock switches:
Primary interlock relay switch shall prevent microwave radiation emission in excess of the requirement as above
mentioned. Secondary interlock relay and door sensing switch shall prevent microwave radiation emission in excess of
5 mW/cm2 at any point 5cm or more from the external surface of the oven.
B. Preparation for testing:
Before beginning the actual measurement of leakage, proceed as follows:
1) Make sure that the actual instrument is operating normally as specified in its instruction booklet.
Important:
Survey instruments that comply with the requirement for instrumentation as prescribed by the performance standard for
microwave ovens, 21 CFR 1030.10(c)(3)(i), must be used for testing.
2) Place the load of 275±15 ml (9.8 oz) of tap water initially at 20±5
The water container shall be a low form of 600 ml (20 oz) beaker with an inside diameter of approx. 8.5 cm (3-1/2 in.) and
made of an electrically nonconductive material such as glass or plastic.
The placing of this standard load in the oven is important not only to protect the oven, but also to insure that any leakage
is measured accurately.
3) Set the cooking control on Full Power Cooking Mode.
4) Close the drawer and select a cook cycle of several minutes. If the water begins to boil before the survey is completed,
replace it with 275 ml of cool water.
O
C (68OF) in the center of the oven cavity.
C. Leakage test:
Closed-drawer leakage test (microwave measurement):
1) Grasp the probe of the survey instrument and hold it perpendicular to the gap between the drawer and the body of the
oven.
2) Move the probe slowly, not faster than 1 in./sec. (2.5 cm/sec.) along the gap, watching for the maximum indication on the
meter.
3) Check for leakage at the drawer screen, sheet metal seams and other accessible positions where the continuity of the
metal has been breached (eg., around the switches, indicator, and vents).
While testing for leakage around the drawer, pull the drawer away from the front of the oven as far as is permitted by the
closed latch assembly.
4) Measure carefully at the point of highest leakage and make sure that the highest leakage is no greater than 4mW/cm2,
and that the primary interlock switch/secondary interlock relay does turn the oven OFF before any door movement.
NOTE: After servicing, record data on service invoice and microwave leakage report.
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KB-3300JS
KB-3300JK
KB-3300JW
NOTES
4
SERVICE MANUAL
FREE STANDING RANGE
WITH MICROWAVE DRAWER
KB-3300JS
KB-3300JK / KB-3300JW
FOREWORD
This Manual has been prepared to provide Sharp Electronics Corp.
Service Personnel and Service Information for the SHARP FREE
STANDING RANGE WITH MICROWAVE DRAWER, KB-3300JS,
KB-3300JK, and KB-3300JW.
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.
PRODUCT DESCRIPTION
POWER CONNECTION
ANTI-TIP DEVICE
SCHEMATICS
TEST PROCEDURE
TOUCH CONTROL PANEL
KB-3300JS
KB-3300JK
KB-3300JW
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.
COMPONENT REPLACEMENT
AND ADJUSTMENT PROCEDURE
WIRING DIAGRAM
PARTS LIST
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
5
KB-3300JS
KB-3300JK
KB-3300JW
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 - 2000W
Case Dimensions Width 29-7/8"
Height 37-5/16"
Depth 27-5/16
Cooking Cavity Dimensions Width 22-5/8"
Height 15-13/16"
3.8 Cubic Feet Depth 18"
Cook Top Heating Elements Two 6" - 1200W
One 8" - 2000W
One 6"/9" - 1200/2400W
Control Complement Touch Control System
Clock ( 1:00 - 12:59 )
Timer (0 - 99 min. 99 seconds)
Bake pad, Broil pad, Self Clean pad, Timed Cook pad, Number selection pads,
Delay Start pad, Stop/Clear pad, Oven Light pad, Control Lock pad, Setup/Custom
Help
Oven Cavity Light 40W x 1
Safety Standard UL Listed
Weight Approx. 260 lbs.
6
MICROWAVE DRAWER SPECIFICATION
ITEM DESCRIPTION
Power Output 1000 watts (IEC TEST PROCEDURE)
Operating frequency of 2450MHz
Cooking Cavity Dimensions Width 17-11/32
Height 5-7/16"
1.0 Cubic Feet Depth 17-1/8"
Control Complement Touch Control System
Clock ( 1:00 - 12:59 )
Timer (0 - 99 min. 99 seconds)
Microwave Power for Variable Cooking
Repetition Rate;
P-HI ................................................. Full power throughout the cooking time
P-90 .................................................................... approx. 90% of Full Power
P-80 .................................................................... approx. 80% of Full Power
P-70 .................................................................... approx. 70% of Full Power
P-60 .................................................................... approx. 60% of Full Power
P-50 .................................................................... approx. 50% of Full Power
P-40 .................................................................... approx. 40% of Full Power
P-30 .................................................................... approx. 30% of Full Power
P-20 .................................................................... approx. 20% of Full Power
P-10 .................................................................... approx. 10% of Full Power
P-0 ..................................................... No power throughout the cooking time
KB-3300JS
KB-3300JK
KB-3300JW
START/MINUTE PLUS pad, Defrost pad, Number selection pad, Power Level
pad, Timer/Clock pad,Stop/Clear pad, Sensor Reheat, Sensor Popcorn, Sensor
Cook, Reheat and Micro Warm.
Oven Cavity Light Yes
Safety Standard UL Listed FCC Authorized
DHHS Rules, CFR, Title 21, Chapter 1, Subchapter J
7
KB-3300JS
KB-3300JK
KB-3300JW
POWER CONNECTION
208/240 VOLT CONNECTION INSTRUCTIONS
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.
1 Locate the voltage switch on the lower back side of the
range.
2 Remove the screw and rotate the switch plate 180 as indicated
in the Figure 3.
3 Reinsert the switch plate and replace screw as indicated
in Figure 4. The voltage setting is indicated by the visible
marking.
screw
screw
240V
180
208V
Figure 3 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.
4-wire wall receptacle (14-50R)
Figure 5A
3-wire wall receptacle (10-50R)
Figure 5B
ACCESS TO TERMINAL BLOCK
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.
Figure 6
Figure 7
POWER CORD CONNECTIONS
4-WIRE CONNECTION INSTRUCTIONS -FIGURE 8
Before wiring the range, review the suggested power source location.
If co nnecting t o a 4 -wire el ect ri cal system fo r a
circuit or mobile home use a 4-wire connection.
1 Follow the power supply kit manufacturer s Installation
Instructions supplied with the strain relief clamp and install.
See Figure 7.
2 Insert the end connectors for line 1, line 2 and neutral and
tighten securely to the terminal block.
IMPORTANT
DO NOT LOOSEN the factory 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 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.
new branch-
strain-relief clamp
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.
8
3
Make sure all connections are tightened securely and replace
the rear access cover. See Figure 7.
GROUNDING INSTRUCTIONS- O NLY 3 -WIRE CON NECTIONS :
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: 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:
1
Follow the manufacturer s Installation Instructions supplied
with the strain relief clamp and install.
2
Strip insulation away from the ends of the permanent wiring
for line 1, line 2 and neutral; also strip ground wire on 4-wire
KB-3300JS
KB-3300JK
KB-3300JW
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.
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.
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.
5
Make sure all connections are tightened securely and replace
the rear access cover. See Figure 7.
Note: Non-terminated fi eld wire compression connections must
be set at approximately 90 in./lbs.
4-WIRE CONNECTION
Connect line
1 here.
Cut ground strap.
Discard ground strap &
ground plate.
Connect green insulated
copper ground wire with
ground screw here.
b
l
a
c
k
g
r
e
e
n
Figure 8
3-WIRE CONNECTION
Connect line
1 here.
G
r
ound
st
r
ap
Note: Install strain-relief
clamp. Center or white
wire must always be
attached to the center
terminal on block.
FOR 3 & 4-WIRE PERMANENT CONNECTIONS
termina
lblock
Note: Install strain-relief
clamp. Center or white
wire must always be
Connect
attached to the center
line 2
terminal on block.
here.
r
e
w
d
h
i
t
e
Connect neutral (white
or center) here.
A user supplied strainrelief clamp must be
installed at this location.
3
It requires 1
/8-inches
(3.5 cm) diameter cord
kit hole.
terminal
block
line 1
neutral
ground
screw
line 2
ground strap
ground plate
Figure 10
4-WIRE PERMANENT CONNECTION ONLY
ground
ground
screw
plate
ground
wire lead
er
t
m
i
n
a
lbl
o
ck
Connect
line 2
here.
Connect neutral (white
or center) here.
A user supplied strain-relief
clamp must be installed at
this location. It requires
3
1
/8-inches (3.5 cm)
diameter cord kit hole.
proper ground for
4-wire permanent
connection
Figure 9
Figure 11
9
KB-3300JS
KB-3300JK
KB-3300JW
ANTI-TIP DEVICE
NORMAL INSTALLATION STEPS
ANTI-TIP BR ACKET INSTALLATION IN STRUCTIONS
IMPO RTANT SAFETY WARNIN G
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.
If range is ever moved to a different location, the Anti-Tip bracket
must also be moved and installed with the range. Instructions are
pr ovi ded for instal lat ion in woo d or cemen t fa stene d to ei ther t he 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
oor or wall, be sure that screws do not penetrate electrical
to the fl
wiring or plumbing.
1
LOCATE THE BRACKET - USING THE TEMPLATE
The bracket may be located on either the left or right side of the
range. Use the information below to locate the bracket if template
is not available.
2
DRILL PILOT HOLES AND FASTEN B RACKET
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.
FASTEN BRACKET
Leveling Leg
Floor Mount
(WALL OR FLOOR MOUNTING)
Anti-Tip Bracket
1
Max 1
Wall Mount
Wall Plate
/4"
Figure 16
FASTEN BRACKET
Leveling Leg
(FLOOR MOUNTING ONLY)
More Than
1
Wall
1
/4"
Figure 15
Mark the floor or wall where left or right side of the range will be
1
located. If rear of range is against the wall or no further than 1
/4inches 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
1
range is further than 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.
Floor Mount
Anti-Tip Bracket
Figure 17
3
LEVEL AND POSITION RANGE
Level range by adjusting the (4) leveling legs with a wrench. Note:
1
A minimum clearance of
/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
fl ashlight and carefully attempt to tilt it forward.
5
/8"
1
Range Slide
10
Figure 18
CONTROL PANEL
KEYSHEET
MICR OWAV EOVE N
HOT SURFACE INDICATOR LIGHTS
CONTROL
KNOBS
CONTROL
KNOBS
ANTI-TIP DEVICE
CONTROL LAYOUT
KB-3300JS
KB-3300JK
KB-3300JW
OFF
HILO
MED
Cooktop
OFF
HILO
MED
OFF
HILO
MED
SMALL LARGE
HI HI
MED MED
Cooktop
LO
OFF
LO
KB-3300JS
11
KB-3300JS
KB-3300JK
KB-3300JW
Schematic-Off Condition
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㪤㪠㪚㪩㪦㪮㪘㪭㪜㩷㪛㪩㪘㪮㪜㪩
㪣㪠㪥㪜㩷㪙㪰㪧㪘㪪㪪㩷㪚㪘㪧㪘㪚㪠㪫㪦㪩
㪇㪅㪇㪇㪊㪊㱘㪝㩷㪉㪌㪇㪭
㪮㪟㪫
㪞㪩㪰
㪪㪜㪚㪦㪥㪛㪘㪩㪰㩷㪠㪥㪫㪜㪩㪣㪦㪚㪢㩷㪪㪮㪠㪫㪚㪟
㪙㪩㪥
㪞㪩㪰
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㪫
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㪙㪩㪥
㪭㪦㪣㪫㪘㪞㪜㩷㪪㪮㪠㪫㪚㪟
#
4;
㪚㪘㪧㪘㪚㪠㪫㪦㪩
㪈㪅㪇㪇㱘
㪘㪚㩷㪉㪊㪇㪇㪭
㪛㪦㪦㪩
㪪㪜㪥㪪㪠㪥㪞
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㪟㪬㪤㪠㪛㪠㪫㪰㩷
㩷㩷㪪㪜㪥㪪㪦㪩
㪙㪩㪥
㧹
㧲
㪝㪘㪥㩷㪤㪦㪫㪦㪩
㧿㧹
㧻㧸
㪦㪭㪜㪥㩷㪣㪘㪤㪧
㪥㪅㪦㪅
㪦㪩
㪞
㪙㪣㪢
㪥㪅㪚㪅
㪝
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.
4'.#;
4;
$
㪙㪣㪢
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㨅
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㪙㪣㪢
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12
KB-3300JS
On condition (Bake & Microwave)
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.
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㪤㪞
㪫㪟㪜㪩㪤㪘㪣
㪚㪬㪫㪄㪦㪬㪫㩷
㪦㪩㪞
㪦㪩㪞
4'. #;
㪮㪟㪫
㪮㪟㪫
㧯㧻㧹㧚
㪚㪦㪥㪫㪩㪦㪣㩷㪬㪥㪠㪫
㨪
㨪
㪣㪠㪥㪜㩷㪙㪰㪧㪘㪪㪪㩷㪚㪘㪧㪘㪚㪠㪫㪦㪩
㪇㪅㪇㪇㪊㪊 㱘㪝㩷㪉㪌㪇㪭
㪩㪜㪪㪠㪪㪫㪦㪩㩷㪋㪎㪇㩷㫂㱅㩷㪈㪆㪉㪮
㪥㪦㪠㪪㪜㩷㪪㪬㪧㪩㪜㪪㪪㪠㪦㪥㩷㪚㪦㪠㪣
㪣㪠㪥㪜㩷㪚㪩㪦㪪㪪㩷㪚㪘㪧㪘㪚㪠㪫㪦㪩㩷㪈㪅㪇㱘㪝㩷㪉㪎㪌㪭
㧸
㪇㪭
㪣㪠㪥㪜㩷㪙㪰㪧㪘㪪㪪㩷㪚㪘㪧㪘㪚㪠㪫㪦㪩
㪇㪅㪇㪇㪊㪊 㱘㪝㩷㪉㪌
㨪
㨪
㪞㪩㪥
㪮㪟㪫
㧹㧟
㧹㧝
㪪㪮㪠㪫㪚㪟
㪛㪦㪦㪩
㪪㪜㪥㪪㪠㪥㪞
㪞㪩㪰 㪙㪩㪥
㪪㪜㪚㪦㪥㪛㪘㪩㪰㩷㪠㪥㪫㪜㪩㪣㪦㪚㪢㩷㪪㪮㪠㪫㪚㪟
㪮㪟㪫
㧾㨅㧡
㧯㧝
㨪 㨪㨪
㧲㧝
㧲㧟
㧲㧞
㪙㪣㪢
㪮㪟㪫
㪩㪜㪛
㪦㪩㪞
㧲㧹
㪙㪩㪥
㪟㪬㪤㪠㪛㪠㪫㪰㩷
㩷㩷㪪㪜㪥㪪㪦㪩
㪙㪩㪥
㪙㪩㪥
㪙㪣㪢
㪞㪩㪰
㧟
㧾㨅
㨪
㨪
㨪
㨪
㧱
㧱㧡 㧱㧝
㧱
㧱㧢
㪦㪩㪞
㪩㪜㪛
㪙㪣㪢
㪙㪩㪥
4; $
㪙㪣㪢
㪩㪜㪛
㪙㪦㪫㪫㪦㪤
㪟㪜㪘㪫㪜㪩
㪩㪜㪛
㪩㪜㪛
㧺㧻㧚
㪩㪜㪛
㪩㪜㪛
㪧㪩㪠㪤㪘㪩㪰㩷㪠㪥㪫㪜㪩㪣㪦㪚㪢㩷㪩㪜㪣㪘㪰
㨪
㧾㨅㧝
㧾㨅㧞
㧺㧻
㧯㧻㧹㧚
㪙㪣㪢
㪙㪣㪢
㪦㪩㪞
㪙㪣㪢
㪙㪣㪢
㪙㪣㪢
㪦㪩㪞
㧻㧸
㧿㧹
㪩㩷㪤㪦㪫㪦㪩
㪦㪭㪜㪥㩷㪣㪘㪤㪧
㪝㪘㪥㩷㪤㪦㪫㪦㪩
㪪㪫㪠㪩㪩㪜
㪮㪟㪫
㪙㪣㪬
㪙㪣㪬
㪙㪣㪬
㪙㪣㪬
㧺㧻㧚
㪙㪩㪥
㪩㪜㪛
㪤㪦㪥㪠㪫㪦㪩㩷㪪㪮㪠㪫㪚㪟
㪙㪣㪢
㨪
㪞㪩㪥
㪦㪩㪞
㪩㪜㪛
㪙㪣㪢
㧭
㪩㪜㪛
㪧㪦㪮㪜㪩㩷㪫㪩㪘㪥㪪㪝㪦㪩㪤㪜㪩
㪦㪩㪞
㪙㪣㪢
㪥㪅㪦㪅
㪭㪦㪣㪫㪘㪞㪜㩷㪪㪮㪠㪫㪚㪟
㧠
㧾㨅
㧺㧻㧚
㧯㧻㧹㧚
㪩㪜㪛
㪫㪦㪧㩷㪟㪜㪘㪫㪜㪩
㪰㪣㪮
㪮㪟㪫
㪙㪣㪬
㧭
㧭㧝
㧭㧞
㪮㪟㪫
㪮㪟㪫
㪮㪟㪫
㪥㪅㪚㪅
4; #
㪚㪘㪧㪘㪚㪠㪫㪦㪩
㪈㪅㪇㪇 㱘㪝
KB-3300JK
KB-3300JW
㪦㪭㪜㪥㩷㪫㪜㪤㪧㪅㩷
㪝㪬㪪㪜㩷㩿㪫㪟㪜㪩㪤㪘㪣㩷㪦㪭㪜㪥㪀
㪩㪜㪛
$
㧮
㪙㪣㪬
㪩㪜㪛
㪩㪜㪚㪫㪠㪝㪠㪜㪩 㪤㪘㪞㪥㪜㪫㪩㪦㪥
㪘㪚㩷㪉㪊㪇㪇㪭
㪤㪠㪚㪩㪦㪮㪘㪭㪜㩷㪛㪩㪘㪮㪜㪩
On condition (Broil & Microwave)
㪣㪉
㪣㪈
㪙㪣㪢
㪙㪣㪢
㪙㪣㪢
㪙㪣㪢
㪚㪦㪥㪫㪩㪦㪣
㪰㪣㪮
㪰㪣㪮
㪧㪉
㪙㪣㪢
㪙㪣㪢
㪙㪣㪢
㪙㪣㪢
㪚㪦㪥㪫㪩㪦㪣
㪦㪩㪞
㪠㪥㪛㪠㪚㪘㪫㪦㪩㩷㪣㪠㪞㪟㪫
㪪㪉㪪㪈
㪰㪣㪮
㪰㪣㪮㪁㪉
㪋
㪩㪜㪛
㪠㪥㪪㪠㪛㪜
㪦㪬㪫㪪㪠㪛㪜
㪋㪸
㪮㪟㪫
㪩㪠㪞㪟㪫㩷㪝㪩㪦㪥㪫
㪪㪬㪩㪝㪘㪚㪜
㪜㪣㪜㪤㪜㪥㪫
㪰㪣㪮
㪧㪣㪈
㪩㪠㪞㪟㪫㩷㪩㪜㪘㪩
㪪㪬㪩㪝㪘㪚㪜
㪜㪣㪜㪤㪜㪥㪫
㪟㪈
㪙㪣㪢
㪈㪸
㪧㪩㪦㪫㪜㪚㪫㪦㪩
㪈㪸㪉㪈
㪧㪩㪦㪫㪜㪚㪫
㪉㪸
㪉㪸
㪦㪩
㪣㪉
㪩㪜㪛
㪩㪜㪛
㪩㪜㪛
㪩㪜㪛
㪩㪜㪛
㪩㪜㪛
㪩㪜㪛
㪙㪩㪥
㪰㪣㪮
㪩㪜㪛
㪉
㪧㪈
㪩㪜㪛
㪩㪜㪛
㪙㪣㪢
㪧㪈
㪩㪜㪛
㪩㪜㪛
㪙㪣㪢
㪣㪉
㪟㪉
㪩㪜㪛
㪩㪜㪛
㪚㪦㪦㪢㩷㪫㪦㪧
㪰㪣㪮
㪙㪣㪢
㪣㪜㪝㪫㩷㪝㪩㪦㪥㪫
㪪㪬㪩㪝㪘㪚㪜
㪰㪣㪮
㪜㪣㪜㪤㪜㪥㪫
㪣㪜㪝㪫㩷㪩㪜㪘㪩
㪪㪬㪩㪝㪘㪚㪜
㪜㪣㪜㪤㪜㪥㪫
㪠㪥㪛㪠㪚㪘㪫㪦㪩㩷㪣㪠㪞㪟㪫
㪣㪝
㪩㪩
㪧㪩㪦㪫㪜㪚㪫㪦㪩
㪧㪩㪦㪫㪜㪚㪫㪦㪩
㪙㪣㪬
㪰㪣㪮
㪙㪣㪢
㪙㪩㪥
㪉㪸㪈㪸㪉㪈
㪮㪟㪫
㪉㪸㪈㪸㪉㪈
㪙㪩㪥
㪈㪹 㪉㪹
㪈㪹 㪉㪹
㪈㪹 㪉㪹
㪈㪹 㪉㪹
㪟㪦㪫㩷㪪㪬㪩㪝㪘㪚㪜
㪣㪠㪞㪟㪫
㪪㪮㪠㪫㪚㪟㪜㪪
㪩㪜㪛
㪟㪉
㪣㪉
㪩㪜㪛
㪩㪜㪛
㪩㪜㪛
㪟㪉
㪙㪣㪢
㪣㪉
㪩㪜㪛
㪙㪣㪢
㪙㪣㪬
㪙㪣㪬
㪙㪣㪢
㪙㪣㪬
㪙㪣㪢
㪙㪣㪢
㪙㪣㪬
㪙㪣㪬
㪧㪣㪈
㪦㪩㪞
㪙㪣㪢
㪙㪣㪢
㪰㪣㪮㪁㪉
㪟㪈
㪙㪣㪢
㪚㪦㪥㪫㪩㪦㪣
㪧㪣㪈
㪙㪣㪢
㪮㪟㪫
㪈
㪟
㪚㪦㪥㪫㪩㪦㪣
㪪㪬㪩㪝㪘㪚㪜㩷㪣㪠㪞㪟㪫
㪟㪦㪫㩷
㪙㪩㪥
㪮㪟㪫
㪩㪝
㪣㪩
㪥
㪮㪟㪫
㪮㪟㪫
㪣㪈
㪙㪣㪢
㪙㪣㪢
㪦㪭㪜㪥
㪙㪣㪢
㪙㪣㪢
㪙㪣㪢
㧯㧻㧹㧚
㪙㪣㪢
㪚㪦㪥㪫㪩㪦㪣㩷㪬㪥㪠㪫
㧣
㧢
㧾㨅
㧯㧟 㧯㧣 㧯㧡
㨪 㨪 㨪 㨪
㨪㨪 㨪
㪙㪣㪢
㪰㪣㪮
㪩㪜㪛
㧹
㪙㪣㪢
㪩㪜㪛
㧹
㪛㪦㪦㪩㩷
㪪㪮㪠㪫㪚㪟
㪦㪩㪞
㪩㪜㪛
㪙㪩㪥
㪦㪩㪞
㧹
㧹
㪛㪦㪦㪩㩷㪣㪦㪚㪢㩷
㪤㪦㪫㪦㪩
㪰㪣㪮
㧹
㧹
㧹
㧲㧹
㪚㪣㪦㪪㪪㩷㪝㪣㪦㪮㩷
㪮㪟㪫
㪮㪟㪫
㪪㪮㪠㪫㪚㪟
㪫㪟㪜㪩㪤㪠㪪㪫㪦㪩
㪥
㪦㪭㪜㪥
㪫㪟㪜㪩㪤㪘㪣
㪩㪜㪛
㧸
㪝㪬㪪㪜
㪉㪇㪘
㪚㪬㪫㪄㪦㪬㪫㩷
㪩㪜㪛
㧤
㧾㨅
㧾㨅
㪦㪩㪞
㪙㪩㪥
㪩㪜㪛
㧸㧹
㧻㧸
.
㪦㪭㪜㪥㩷㪣㪘㪤㪧
㪛㪦㪦㪩㩷㪣㪦㪚㪢㩷
㪝㪘㪥㩷㪤㪦㪫㪦㪩
㪤㪦㪫㪦㪩
㪮㪟㪫㪮㪟㪫
㪤㪞
㪫㪟㪜㪩㪤㪘㪣
㪚㪬㪫㪄㪦㪬㪫㩷
㪦㪩㪞
㪦㪩㪞
4'. #;
㪮㪟㪫
㪮㪟㪫
㪮㪟㪫
㧯㧻㧹㧚
㪚㪦㪥㪫㪩㪦㪣㩷㪬㪥㪠㪫
㨪
㨪
㪣㪠㪥㪜㩷㪙㪰㪧㪘㪪㪪㩷㪚㪘㪧㪘㪚㪠㪫㪦㪩
㪇㪅㪇㪇㪊㪊 㱘㪝㩷㪉㪌㪇㪭
㪩㪜㪪㪠㪪㪫㪦㪩㩷㪋㪎㪇㩷㫂㱅㩷㪈㪆㪉㪮
㪥㪦㪠㪪㪜㩷㪪㪬㪧㪩㪜㪪㪪㪠㪦㪥㩷㪚㪦㪠㪣
㪣㪠㪥㪜㩷㪚㪩㪦㪪㪪㩷㪚㪘㪧㪘㪚㪠㪫㪦㪩㩷㪈㪅㪇㱘㪝㩷㪉㪎㪌㪭
㧸
㪇㪭
㪣㪠㪥㪜㩷㪙㪰㪧㪘㪪㪪㩷㪚㪘㪧㪘㪚㪠㪫㪦㪩
㪇㪅㪇㪇㪊㪊 㱘㪝㩷㪉㪌
㨪
㨪
㪞㪩㪥
㪮㪟㪫
㧹㧝
㧹㧟
㪛㪦㪦㪩
㪪㪜㪥㪪㪠㪥㪞
㪪㪮㪠㪫㪚㪟
㪞㪩㪰 㪙㪩㪥
㪪㪜㪚㪦㪥㪛㪘㪩㪰㩷㪠㪥㪫㪜㪩㪣㪦㪚㪢㩷㪪㪮㪠㪫㪚㪟
㪮㪟㪫
㧾㨅㧡
㧯㧝
㨪 㨪㨪
㧲㧝
㧲㧟
㧲㧞
㪙㪣㪢
㪮㪟㪫
㪩㪜㪛
㪦㪩㪞
㧲㧹
㪙㪩㪥
㪟㪬㪤㪠㪛㪠㪫㪰㩷
㩷㩷㪪㪜㪥㪪㪦㪩
㪙㪩㪥
㪙㪩㪥
㪙㪣㪢
㪞㪩㪰
㧟
㧾㨅
㨪
㨪
㨪
㨪
㧱
㧱㧡 㧱㧝
㧱
㧱㧢
㪦㪩㪞
㪩㪜㪛
㪙㪣㪢
㪙㪩㪥
4; $
㪙㪣㪢
㪩㪜㪛
㧾㨅㧝
㧺㧻
㪦㪩㪞
㪙㪣㪢
㪦㪩㪞
㧿㧹
㪝㪘㪥㩷㪤㪦㪫㪦㪩
㪮㪟㪫
㪙㪣㪬
㪙㪦㪫㪫㪦㪤
㪟㪜㪘㪫㪜㪩
㪩㪜㪛
㪩㪜㪛
㧺㧻㧚
㪩㪜㪛
㪩㪜㪛
㪧㪩㪠㪤㪘㪩㪰㩷㪠㪥㪫㪜㪩㪣㪦㪚㪢㩷㪩㪜㪣㪘㪰
㨪
㧾㨅㧞
㧯㧻㧹㧚
㪙㪣㪢
㪙㪣㪢
㪙㪣㪢
㪙㪣㪢
㧻㧸
㪩㩷㪤㪦㪫㪦㪩
㪦㪭㪜㪥㩷㪣㪘㪤㪧
㪪㪫㪠㪩㪩㪜
㪙㪣㪬
㪙㪣㪬
㪙㪣㪬
㧺㧻㧚
㪙㪩㪥
㪩㪜㪛
㪤㪦㪥㪠㪫㪦㪩㩷㪪㪮㪠㪫㪚㪟
㪙㪣㪢
㨪
㪞㪩㪥
㪦㪩㪞
㪩㪜㪛
㪙㪣㪢
㧭
㪩㪜㪛
㪧㪦㪮㪜㪩㩷㪫㪩㪘㪥㪪㪝㪦㪩㪤㪜㪩
㪙㪣㪢
㪦㪩㪞
㪥㪅㪦㪅
㪭㪦㪣㪫㪘㪞㪜㩷㪪㪮㪠㪫㪚㪟
㧠
㧾㨅
㧺㧻㧚
㧯㧻㧹㧚
㪩㪜㪛
㪦㪭㪜㪥㩷㪫㪜㪤㪧㪅㩷
㪫㪦㪧㩷㪟㪜㪘㪫㪜㪩
㪰㪣㪮
㪮㪟㪫
㪙㪣㪬
㧭
㧭㧝
㧭㧞
㪝㪬㪪㪜㩷㩿㪫㪟㪜㪩㪤㪘㪣㩷㪦㪭㪜㪥㪀
㪩㪜㪛
$
㧮
㪙㪣㪬
㪮㪟㪫
㪮㪟㪫
㪩㪜㪛
㪮㪟㪫
㪥㪅㪚㪅
4; #
㪩㪜㪚㪫㪠㪝㪠㪜㪩 㪤㪘㪞㪥㪜㪫㪩㪦㪥
㪚㪘㪧㪘㪚㪠㪫㪦㪩
㪈㪅㪇㪇 㱘㪝
㪘㪚㩷㪉㪊㪇㪇㪭
㪤㪠㪚㪩㪦㪮㪘㪭㪜㩷㪛㪩㪘㪮㪜㪩
13
KB-3300JS
KB-3300JK
KB-3300JW
COOK TOP SCHEMATIC (DETAIL)
㪣㪈
㪙㪣㪢
㪙㪣㪢
㪙㪣㪢
㪙㪣㪢
㪰㪣㪮
㪙㪣㪢
㪙㪣㪢
㪦㪩㪞
㪚㪦㪦㪢㩷㪫㪦㪧
㪚㪦㪥㪫㪩㪦㪣
㪰㪣㪮
㪧㪉
㪣㪈
㪚㪦㪥㪫㪩㪦㪣
㪪㪉㪪㪈
㪋
㪋㪸
㪧
㪟㪈
㪰㪣㪮
㪩㪜㪛
㪮㪟㪫
㪰㪣㪮
㪮㪟㪫
㪰㪣㪮
㪩㪜㪛
㪰㪣㪮
㪮㪟㪫
㪰㪣㪮
㪰㪣㪮
㪰㪣㪮
㪧㪈㪙
㪠㪥㪪㪠㪛㪜
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14
㧸
MICROWAVE DRAWER SCHEMATIC (DETAIL)
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KB-3300JS
KB-3300JK
KB-3300JW
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15
KB-3300JS
KB-3300JK
KB-3300JW
RANGE SCHEMATIC (DETAIL)
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16
TEST PROCEDURES
PROCEDURE
LETTER
A 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 38.
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 glass unit connection before replacement.
2) Reconnect all leads removed from components during testing.
3) Re-install the covers.
4) Reconnect the power supply cord after the covers are 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 covers.
2) Open the drawer and block it open.
3) Discharge high voltage capacitor.
4) Replace the Keyboard glass unit.
5) Reconnect all leads removed from components during testing.
6) Re-install the covers.
7) Reconnect the power supply cord after the covers are 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 glass unit test (Procedure B) 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 38.
2) Open the drawer and block it open.
3) Discharge high voltage capacitor.
COMPONENT TEST
17
KB-3300JS
KB-3300JK
KB-3300JW
KB-3300JS
KB-3300JK
KB-3300JW
TEST PROCEDURES
PROCEDURE
LETTER
4) Reconnect all leads removed from components during testing.
5) Re-install the covers.
6) Reconnect the power supply cord after the covers are installed.
7) Run the oven and check all functions.
B KEYBOARD GLASS UNIT TEST
1. Disconnect the power supply cord, and then reconnect power supply cord. Display should show the
word; “WAIT” in either one or both displays.
2. Immediately press the following keys within 20 seconds (Use flat part of thumb or finger):
“Power Level” then “Timer Clock” then “Start / Auto Minutes” then “Stop Clear”.
Test mode should start scrolling through each digit.
3. After each digit is confirmed, press every key on Keyboard Glass unit (within 50 seconds).
4. After every key is pressed, open Microwave Drawer and verify the following display:
FFFE KEYFFFF
OVEN display MICROWAVE display
If any other code is displayed, one or more Key Units are bad and the Keyboard Glass unit will need
to be replaced.
5. Remove the old keyboard glass unit (see page 38) and install the new keyboard glass unit (as the
normal keyboard unit).
6. Reconnect the wire harness to the keyboard glass unit.
7. Repeat steps 1 - 4 to confirm Keyboard Glass Unit is working properly.
8. Re-install the covers (confirm cooktop wires are tucked under microwave cavity lip as shown on
p.38).
9. Reconnect the power supply cord after the covers are installed.
10.Run the oven and check all functions.
COMPONENT TEST
C RELAY TEST
1. Disconnect the power supply cord, and then disassemble as per "OVEN/MICROWAVE DRAWER
DISASSEMBLY" page 38.
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,
RELAY SYMBOL TEST POINT OPERATIONAL VOLTAGE CONNECTED COMPONENTS
RY1 H6 Approx. 18V D.C. Oven lamp / Stirrer motor
RY2 H4 Approx. 18V D.C. Power transformer
RY3 H7 Approx. 18V D.C. Oven common relay
RY4 H8 Approx. 18V D.C. Top heater
RY5 H9 Approx. 24V D.C. Fan motor (Microwave)
RY6 H10 Approx. 24V D.C. Fan motor (Oven)
RY7 H11 Approx. 24V D.C. Oven lamp (Oven)
RY8 H15 Approx. 24V D.C. Door lock motor
RY-B H14 Approx. 24V D.C. Bottom heater
control unit is defective.
18
TEST PROCEDURES
KB-3300JS
KB-3300JK
KB-3300JW
PROCEDURE
LETTER
COMPONENT TEST
8.Disconnect the power supply cord, and then remove covers.
9.Open the drawer and block it open.
10.Discharge high voltage capacitor.
11.Reconnect all leads removed from components during testing.
12.Re-install the covers.
13.Reconnect the power supply cord after the covers are installed.
14.Run the oven and check all function.
D DEFROST TEST
WARNING : The oven should be fully assembled before following procedure.
(1) Place one cup of water in the center of the tray in the oven cavity.
(2) Close the drawer, touch the Defrost pad. Then select Steaks/Chops by touching the number pad 2.
And touch the number pad 5. (Now, weight 0.5lb is set.) And then touch the start pad.
(3) The oven is in Defrost cooking condition.
(4) The oven will operate as follows
WEIGHT 1ST 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.
2) Remove the covers.
3) Open the drawer and block it open.
4) Discharge high voltage capacitor.
5) If the Fuse is blown, replace power unit.
6) Make a visual inspection of the varistor. Check for burned damage. If the varistor has been burned,
replace the power unit.
7) 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.
8) Reconnect all leads removed from components during testing.
9) Re-install the covers.
10) Reconnect the power supply cord after the covers are installed.
11) 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.
2) Remove the covers.
3) Open the drawer and block it open.
4) Discharge high voltage capacitor.
5) Disconnect the leads to the primary of the power transformer.
6) Ensure that these leads remain isolated from other components and oven chassis by using
insulation tape.
7) After that procedure, re-connect the power supply cord.
8) Follow the troubleshooting guide given below for repair.
STEPS OCCURRENCE CAUSE OR CORRECTION
1 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 Touch control transformer or secondary circuit defective.
side of touch control transformer. Check and replace touch control transformer or power
19
unit .
KB-3300JS
KB-3300JK
KB-3300JW
TEST PROCEDURES
PROCEDURE
LETTER
9) Disconnect the power supply cord, and then remove the covers.
10) Open the drawer and block it open.
11) Discharge high voltage capacitor.
12) Reconnect all leads removed from components during testing.
13) Re-install the covers.
14) Reconnect the power supply cord after the covers are installed.
15) 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 95οF (35οC).
(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.
COMPONENT TEST
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 drawer.
(4) Touch the TIMER/CLOCK pad once, the POWER LEVEL pad twice and the START pad once. And touch
the number pads 1 once and the number pad 4 once. Now, the oven is in the sensor cooking condition,
and "AH20" and "ON" 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. If the oven stops after 5 minutes and no ERROR code is displayed, then the AH sensor
is normal. Check other parts except the AH sensor.
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 38.
(2) Open the drawer and block it open.
(3) Discharge high voltage capacitor.
(4) Remove the AH sensor.
(5) Install the new AH sensor.
(6) Reconnect all leads removed from components during testing.
(7) Re-install the covers.
(8) Reconnect the power supply cord after the covers 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.
20
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