SHARP KB3425L, KB-3425JK, KB-3425JW, KB-4425JS, KB-442 Service Manual

...

SERVICE MANUAL

FREE STANDING/SLIDE-IN RANGE

WITH MICROWAVE DRAWER

MODELS

KB-3425LS/K/W KB-4425LS/K/W

S66R264KB442L

KB-3425LS KB-3425LK KB-3425LW

KB-4425LW pictured

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

KB-4425LS KB-4425LK KB-4425LW

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.

ments, check the magnetron, wave guide or transmission line, and cavity for proper alignment, integrity, and connections.

(d) Any defective or misadjusted components in the interlock, monitor, door seal, and microwave generation and

transmission systems shall be repaired, replaced, or adjusted by procedures described in this manual before the oven is released to the owner.

(e) A microwave leakage check to verify compliance with the Federal Performance Standard should be performed

on each oven prior to release to the owner.

BEFORE SERVICING

Before servicing an operative unit, perform a microwave emission check as per the Microwave Measurement Procedure outlined in this service manual. If microwave emissions level is in excess of the speciﬁed limit, contact SHARP ELECTRONICS CORPORATION immediately @1-800-237-4277.

If the unit operates with the door open, service person should 1) tell the user not to operate the oven and 2) contact SHARP ELECTRONICS CORPORATION and Food and Drug Administration's Center for Devices and Radiological Health immediately.

Service personnel should inform SHARP ELECTRONICS CORPORATION of any certiﬁed unit found with emissions in excess of 4mW/cm2. The owner of the unit should be instructed not to use the unit until the oven has been brought into compliance.

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 , a n d t hen 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-3425LS/K/W KB-4425LS/K/W

When the testing is completed,

1. Disconnect the power supply cord, and then remove covers.

2. Open the drawer and keep it open.

3. Discharge high voltage capacitor.

4. Reconnect the leads to the primary of the power transformer.

5. Reinstall the covers.

6. Reconnect the power supply cord.

7. Run the unit and check all functions.

The high-voltage capacitor remains charged about 60 seconds after the oven has been switched off. Wait for 60 seconds and then short-circuit the connection of the high-voltage capacitor (that is the connecting lead of the high-voltage rectiﬁer) against the chassis with the use of an insulated screwdriver.

Whenever troubleshooting is performed the power supply must be disconnected. It may, in some cases, be necessary to connect the power supply after the outer case has been removed, in this event:

1. Disconnect the power supply cord, and then remove neccessary covers.

2. Open the drawer and keep it open.

3. Discharge high voltage capacitor.

4. Disconnect the leads to the primary of the power transformer.

5. Ensure that the leads remain isolated from other components and oven chassis by using insulation tape.

6. After that procedure, reconnect the power supply cord.

After repairing

1. Reconnect all leads removed from components during testing.

2. Reinstall the covers.

3. Reconnect the power supply cord.

4. Run the oven and check all functions.

Microwave ovens should not be operated empty. To test for the presence of microwave energy within a cavity, place a cup of cold water on the oven tray, close the drawer and set the power to HIGH and set the microwave timer for two (2) minutes. When the two minutes has elapsed (timer at zero) carefully check that the water is now hot. If the water remains cold carry out Before Servicing procedure and re-examine the connections to the component being tested.

When all service work is completed and the oven is fully assembled, the microwave power output should be checked and a microwave leakage test should be carried out.

KB-3425LS/K/W

ATTENTION!!!

Thisservicemanual is intendedfor useby persons having electricalandmechanical training anda level of knowledgeof these subjects generallyconsidered acceptablein the appliance repair trade. Sharp Electronics Corporation cannot be responsible, nor assume any liability, for injury or damage of any kind arising from the use of this manual.

SAFE SERVICING PRACTICES

To avoid personal injury and/or property damage, it is important that Safe Servicing Practices be observed. The following are some limited examples of safe practices:

1. DO NOT attempt a product repair if you have any doubts as to your ability to complete it in a safe and satisfactory manner.

2. Before servicing or moving an appliance:

• Remove the power cord from the electrical outlet, trip the circuit breaker to the

OFF position, or remove the fuse.

3. Never interfere with the proper operation of any safety device.

4. USE ONLY REPLACEMENT PARTS CATALOGED FOR THIS APPLIANCE. SUBSTITUTIONS MAY DE F E A T COMPL I A N C E 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 areproperly dressed and secured away from sharp edges,

high-temperaturecomponents, and moving parts

• Allnon-insulated electricalterminals, connectors,heaters,etc. areadequately

spaced away from all metal parts and panels

• All safety grounds (both internal and external) are correctly and securely

connected

• All panels are properly and securely reassembled

KB-4425LS/K/W

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

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.

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.

KB-3425LS/K/W KB-4425LS/K/W

NOTES

SERVICE MANUAL

KB-3425LS/K/W KB-4425LS/K/W

FREE STANDING /SLIDE-IN RANGE

WITH MICROWAVE DRAWER

KB-3425LS / KB-3425LK / KB-3425LW KB-4425LS / KB-4425LK / KB-4425LW

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.

PRODUCT DESCRIPTION

POWER CONNECTION ANTI-TIP DEVICE

SCHEMATICS

TEST PROCEDURE

TOUCH CONTROL PANEL

COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE

WIRING DIAGRAM

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

PARTS LIST

SHARP PLAZA, MAHWAH,

NEW JERSEY 07430-2135

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" Height 15-13/16"

3.6 Cubic Feet Depth 18"

Cook Top Heating Elements Two 6" - 1200W

One 8" - 2000W

One 6"/9" - 1200/2400W One 6" - 100W

Control Complement 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 40W x 1

Safety Standard UL Listed

Weight Approx. 260 lbs.

MICROWAVE DRAWER SPECIFICATION

ITEM DESCRIPTION

Power Output 1000 watts (IEC TEST PROCEDURE) Operating frequency of 2450MHz

Cooking Cavity Dimensions Width 17-11/32 Height 5-7/8"

1.0 Cubic Feet Depth 17-1/8"

Control Complement Touch 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

KB-3425LS/K/W KB-4425LS/K/W

Kitchen Timer, Cooktop Warm, Stop/Clear, Oven Light, Start, LOWER OVEN, Start/ Minute Plus,

UPPER MICROWAVE OVEN, OPEN, CLOSE.

Oven Cavity Light Yes

Safety Standard UL Listed FCC Authorized

DHHS Rules, CFR, Title 21, Chapter 1, Subchapter J

KB-3425LS/K/W

208/240 VOLT CONNECTION INSTRUCTIONS

The rangecan be set for 208V or 240V. The voltage settingfor your range is pre-set at 240V from the factory. Follow these steps to change the voltage setting.

1 Locate the voltage switch on the lower back side of the

range.

2 Removethe screwandrotate theswitchplate180 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.

POWER CORD CONNECTIONS

4-WIRE CONNECTION INSTRUCTIONS-FIGURE 8

Beforewiringtherange,reviewthe suggested powersourcelocation. Ifconnecting to a 4-wireelectrical system for a

new branch-

circuit or mobile home use a 4-wire connection.

1 Follow the power supply kit manufacturer s Installation

Instructions supplied with the strain relief clamp and install. See Figure 7.

2 Insert the end connectors for line 1, line 2 and neutral and

tighten securely to the terminal block.

IMPORTANT

DO NOT LOOSEN the factory 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 Connectthegreengroundwireleadwith the eyeletto 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

ACCESS TO TERMINAL BLOCK

Loosen screw on rear access cover and pull down as illustrated in Figure6toaccessterminal blockwiring connection.Toclose,return to original location and secure screw.

Figure 6

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.

Figure 5A

4-wire wall receptacle (14-50R)

Figure 5B

3-wire wall receptacle (10-50R)

strain-relief clamp

Figure 7

240V

180

screw

208V

screw

KB-4425LS/K/W

POWER CONNECTION

KB-3425LS/K/W

3 Make sure all connections are tightened securely and replace

the rear access cover.See Figure 7.

GROUNDING IN STRUCTIONS - ONLY 3 -WIRE CONNECTION S:

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, lowestscrew SeeFigure9. Theground strapmustnotbe removedunlessNational State or Local Codes do not permit use of a ground strap.

Note: If the ground strap is removed forany 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 – followsteps 1,2 and 5 below. 4–wire permanent connection – followall steps below.

Beforewiringthe range,reviewthe suggestedpowersourcelocation 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

Note: Install strain-relief clamp. Center or white wire must always be attached to the center terminal on block.

Connect neutral (white or center) here.

Connect line 1 here.

Connect line 2 here.

A user supplied strain-relief clamp must be installed at this location. It requires 13/8-inches (3.5 cm) diameter cord kit hole.

Figure 9

A user supplied strainrelief clamp must be installed at this location. It requires 13/8-inches (3.5 cm) diameter cord kit hole.

Connect green insulated copper ground wire with ground screw here.

Cut ground strap. Discard ground strap & ground plate.

Connect neutral (white or center) here.

Connect line 1 here.

Connect line 2 here.

Note: Install strain-relief clamp. Center or white wire must always be attached to the center terminal on block.

Figure 8

4-WIRE CONNECTION

3-WIRE CONNECTION

Figure 10

ground

screw

ground

wire lead

ground

plate

proper ground for 4-wire permanent connection

Figure 11

4-WIRE PERMANENT CONNECTION ONLY

FOR 3 & 4-WIRE PERMANENT CONNECTIONS

connections.Tightenall 3 or 4-wire leads to the terminal block. Followwire locations shown in Figure 10.

IMPORTANT

Note: For 3-wirepermanentconnection skipsteps 3 and4 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 copperstrap fromthe terminalblock.KEEP theground screw, ground plate and go to step 4.

4 Connect the green ground wire lead to the frame of the range

usingthe groundscrewand plateas showninFigure11. 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 fieldwirecompressionconnectionsmust

be set at approximately 90 in./lbs.

terminal block

ground

screw

ground plate

ground strap

line 2

neutral

line 1

KB-4425LS/K/W

KB-3425LS/K/W

2 DRILL PILOT HOLES AND FASTEN BRACKET

Drill a1/8-inch pilot hole where screws are to be located. If bracket is to be mounted to the wall, drill pilot hole at an approximate 20 degree downward angle. If bracket is to be mounted to masonry or ceramic floors, drill a5/32-inch pilot hole 13/4-inches deep. The screws provided may be used in wood or concrete material. Use a

/16-inch nut-driver or flat head screwdriver to secure the bracket

in place.

FASTEN BRACKET (WALL OR FLOOR MOUNTING)

FASTEN BRACKET (FLOOR MOUNTING ONLY)

Floor Mount

Anti-Tip Bracket

Wall

Wall Mount

Wall Plate

More Than

11/4"

Max 11/4"

Leveling Leg

3 LEVEL AND POSITION RANGE

Level range by adjusting the (4) leveling legs with a wrench. Note: A minimum clearance of1/8-inch is required between the bottom of the range and the leveling leg to allow room for the bracket. Use a levelto check your adjustments. Plug range into properlyprepared electrical receptacle or if hard wired, check that it was completed properly. Check door condition for evenness and stability. Slide range back into position.

Visuallycheck that rear levelinglegisinserted into and fully secured by the Anti-Tip bracket by looking underneath the range with a flashlight and carefully attempt to tilt it forward.

ANTI-TIP DEVICE

NORMAL INSTALLATION STEPS

ANTI-TIP BR ACKET INSTALLATION INSTRUCTIONS IMPO RTANT SAFETY WARNING

To reduce the risk of tipping of the range, the range must be secured to the floorby properly installed Anti-Tip bracket and screwspacked 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 provided forinstallationinwoodor cementfastenedto eitherthefloor orwall.Wheninstalledtothewall,makesurethatscrewscompletely penetratedry wall and are securedin woodormetal.When fastening to the floor or wall, be sure that screws do not penetrate electrical wiring or plumbing.

1 LOCATE THE BR ACKET - USING THE TE MPLATE

The bracket may be located on either the left or right side of the range. Use the information below to locate the bracket if template is not available.

Mark the floor or wall where left or right side of the range will be located. If rear of range is against the wall or no further than 11/4inchesfromwallwheninstalled, youmay use the wall or floormount method. If molding is installed and does not allow the bracket to fit push against the wall, removemoldingor 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 rangeis further than 11/4-inchesfrom the wall wheninstalled, attach bracket to the floor. For floor mount, locate the bracket by placing backedgeofthe templatewheretherear of the range will be located. Mark the location of the screw holes, shown in template.

Figure 18

Figure 15

Figure 16

Figure 17

Range Slide

15/8" to edge

of bracket

KB-4425LS/K/W

KB-3425L Shown

KB-3425LS/K/W KB-4425LS/K/W

KB-3425LS

KB-3425LS/K/W

COOK TOP

NOTES:

1. Circuits / wire colors are subject to change without notice.

2. Terminal that is located on the right side on lamp sockets back view

must be connected to neutral wire.

RY1

RY5

HUMIDITY

SENSOR

NOISE SUPRESSION COIL

RESISTOR 470 kohm 1/2W

LINE CROSS CAPACITOR 1.0uF 250V

LINE BYPASS CAPACITOR

0.0033uF 250V

LINE BYPASS CAPACITOR

0.0033uF 250V

FUSE 20A

FAN MOTOR

CLOSS FLOW FAN MOTOR

EN LAMP

OVEN LAMP

CONV. HEATER

TOP HEATER

MONITOR SWITCH

PRIMARY INTERLOCK

RELAY

RECTIFIER MAGNETRON

POWER TRANSFORMER

CAPACITOR

1.00uF AC 2300V

STIRRER MOTOR

DOOR LOCK MOTOR

N.O.

COM.

N.O.

COM.

RY7

RY4

RY10

RY3

RY8

RY11

CONTROL UNIT

M12

DOOR LOCK MOTOR SWITCH

THERMISTOR

M11

M10

N2 N3

DOOR SWITCH

CONTROL UNIT

OVEN

MICROWAVE DRAWER

SWITCHING POWER SUPPLY UNIT

INSIDE

OUTSIDE

CONTROL

RIGHT FRONT

SURFACE

ELEMENT

44aS2S1

H2 /

P1 /

CONTROL

H1 /

L1 /

L2 /

H2 /

PROTECTOR

CONTROL

INDICATOR LIGHT

HOT SURFACE LIGHT

HOT SURFACE

LIGHT

SWITCHES

H1 /

L1 /

L2 /

H2 /

CONTROL

LEFT REAR

SURFACE

ELEMENT

H1 /

L1 /

L2 /

1b /

2b /

1b /

2b /

1b /

2b /

1b /

2b /

OVEN

THERMAL

CUT-OUT

THERMAL

CUT-OUT

RY9

CONV. MOTOR

C3 C7

E6 E5 E3

RY6

SECONDARY INTELOCK SWITCH

VOLTAGE SWITCH

MICROWAVE DRAWER

DOOR OPEN-CLOSE

MOTOR

DOOR

POSITION

SWITCH

FRONT

M14 M13

DOOR

POSITION

SWITCH

REAR

BOTTOM HEATER

OVEN THERMAL CUT-OUT (THERMAL OVEN)

DOOR SENSING SWITCH

P1 /

PROTECTOR

LEFT FRONT

SURFACE

ELEMENT

P1 /

PROTECTOR

RIGHT REAR

SURFACE

ELEMENT

PROTECTOR

P1 /

PROTECTOR

RY-BRY-C

WARMER

SURFACE

ELEMENT

LOW VOLTAGE

TRANSFORMER

BLK

YLW

BLK

YLW

WHT

BLK

ORG

RED

YLW

RED

BLK

WHT

RED

BRN

RED

YLW

RED

YLW

ORG

YLW

WHT

YLW

RED

YLW

RED

RED RED

BLK

BLK BLK

RED

YLW

WHT

YLW

BLU

BLK

YLW

BRN

YLW

WHT

RED

BRN

BLU

BLK

YLW

WHT

BLK

BLU

BLK

BLU

BLK

YLW

RED

WHT

YLW

RED

BLK

YLW

WHT

BLK

RED

BLK

RED

YLW

RED

BLK

ORG

BRN

BLK

WHT

YLW

WHT WHT

ORG

RED

BLU

WHT

YLW

WHT

BRN

RED

BLK

GRY

BLK

WHT

BLU

BLK

RED RED

BLK

RED

WHT

BLK

BLU

BLK

BRN

GRY

YLW

ORG

YLW

BLK

RED

BLU

WHT

ORG

RED

BLK

RED

BRN

RED

WHT

GRN

BLK

RED

BLK

BRNBLK

BLK

RED

BLK

WHT

ORG

RED

WHT

BRN

ORG

WHT

ORG

RED

BLK

WHT

BRN

WHT

BLK

RED

ORG

P1B /

P1A /

KB-4425LS/K/W

Schematic-Off Condition

COOK TOP SCHEMATIC (DETAIL)

COOK TOP

INSIDE

OUTSIDE

CONTROL

RIGHT FRONT SURFACE ELEMENT

S2S1

H2 /

P1 / 4

CONTROL

H1 /

L1 /

L2 /

H2 /

PROTECTOR

CONTROL

INDICATOR LIGHT

HOT SURFACE LIGHT

HOT SURFACE LIGHT SWITCHES

H1 /

L1 /

L2 /

H2 /

CONTROL

LEFT REAR SURFACE ELEMENT

H1 /

L1 /

L2 /

1b / H

2b / S

1b / H

2b / S

1b / H

2b / S

1b / H

2b / S

P1 / 4

PROTECTOR

LEFT FRONT SURFACE ELEMENT

P1 / 4

PROTECTOR

RIGHT REAR SURFACE ELEMENT

PROTECTOR

P1 / 4

PROTECTOR

WARMER SURFACE ELEMENT

BLK

YLW

BLK

YLW

WHT

BLK

ORG

RED

YLW

RED

BLK

WHT

RED

BRN

RED

YLW

RED

YLW

ORG

YLW

WHT

YLW RED

YLW

RED

BLK

RED

YLW

WHT

YLW

BLU

BLK

YLW

BRN

YLW

WHT

RED

BRN

BLU

BLK

YLW

WHT

BLK

BLU

BLK

BLU

BLK

YLW

RED WHT

YLW

RED

BLK

YLW

WHT

BRN

WHT

P1B / 4

P1A / 4A

KB-3425LS/K/W KB-4425LS/K/W

KB-3425LS/K/W

RY1

RY5

HUMIDITY

SENSOR

NOISE SUPRESSIONCOIL

RESISTOR 470kohm 1/2W

LINE CROSSCAPACITOR 1.0uF 250V

LINE BYPASSCAPACITOR

0.0033uF 250V

LINE BYPASSCAPACITOR

0.0033uF 250V

FUSE 20A

FAN MOTOR

EN LAMP

MONITOR SWITCH

PRIMARY INTERLOCK

RELAY

RECTIFIER MAGNETRON

POWER TRANSFORMER

CAPACITOR

1.00uF AC 2300V

STIRRER MOTOR

N.O.

COM.

N.O.

COM.

RY11

CONTROL UNIT

N2 N3

MICROWAVE DRAWER

SWITCHING POWER SUPPLY UNIT

OVEN

THERMAL

CUT-OUT

THERMAL

CUT-OUT

SECONDARY INTELOCK SWITCH

VOLTAGE SWITCH

MICROWAVE DRAWER

DOOR OPEN-CLOSE

MOTOR

DOOR

POSITION

SWITCH

FRONT

M14 M13

DOOR

POSITION

SWITCH

REAR

DOOR SENSING SWITCH

RY-BRY-C

LOW VOLTAGE

TRANSFORMER

RED

BLK

BLU

BLK

BRN

GRY

YLW

ORG

YLW

BLK

RED

BLU

WHT

ORG

RED

BLK

RED

BRN

RED

WHT

GRN

BLK

RED

BLK

BRNBLK

BLK

RED

BLK

WHT

ORG

RED

WHT

BRN

ORG

WHT

ORG

RED

BLK

WHT

ORG

KB-4425LS/K/W

MICROWAVE DRAWER SCHEMATIC (DETAIL)

KB-3425LS/K/W

CLOSS FLOW FAN MOTOR

OVEN LAMP

CONV. HEATER

TOP HEATER

DOOR LOCK MOTOR

N.O.

COM.

RY7

RY4

RY10

RY3

RY8

M12

DOOR LOCK MOTOR SWITCH

THERMISTOR

M11

M10

DOOR SWITCH

CONTROL UNIT

OVEN

RY9

CONV. MOTOR

C3 C7

E6 E5 E3

RY6

BOTTOM HEATER

OVEN THERMAL CUT-OUT (THERMAL OVEN)

RY-BRY-C

BLK

RED

BLK

RED

YLW

RED

BLK

ORG

BRN

BLK

WHT

YLW

WHT WHT

ORG

RED

BLU

WHT

YLW

WHT

BRN

RED

BLK

GRY

BLK

WHT

BLU

BLK

RED RED

BLK

RED

WHT

BLK

WHT

BLK

RED

ORG

KB-4425LS/K/W

RANGE SCHEMATIC (DETAIL)

KB-3425LS/K/W KB-4425LS/K/W

PROCEDURE LETTER

A TOUCH CONTROL PANEL ASSEMBLY TEST

The touch control panel consists of circuits including semiconductors such as LSI, ICs, etc. Therefore,

TEST PROCEDURES

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.

COMPONENT TEST

KB-3425LS/K/W KB-4425LS/K/W

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 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.

COMPONENT TEST

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 OPERATIONAL VOLTAGE CONNECTED COMPONENTS

RY1 Approx. 18V D.C. Oven lamp / Stirrer motor

RY2 Approx. 18V D.C. Power transformer

RY3 Approx. 18V D.C. Oven common relay

RY4 Approx. 18V D.C. Top heater

RY5 Approx. 24V D.C. Fan motor (Microwave)

RY6 Approx. 24V D.C. Fan motor (Oven)

RY7 Approx. 24V D.C. Oven lamp (Oven)

RY8 Approx. 24V D.C. Door lock motor (Oven)

RY9 Approx. 24V D.C. Convection motor

RY10 Approx. 24V D.C. Warmer (Cook top)

RY11 Approx. 24V D.C. Switching power supply

RY-B Approx. 24V D.C. Bottom heater

RY-C Approx. 24V D.C. Convection heater

KB-3425LS/K/W KB-4425LS/K/W

PROCEDURE LETTER

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

(5) If improper operation is indicated, the control unit is probably defective and should be checked.

TEST PROCEDURES

COMPONENT TEST

WEIGHT 1ST STAGE 2ND STAGE 3RD. STAGE

LEVEL TIME LEVEL TIME LEVEL TIME

0.5lb 60% 20sec. 40% 20sec. 30% 45sec.

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.

TEST PROCEDURES

PROCEDURE LETTER

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 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 95 (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

F (35oC).

KB-3425LS/K/W KB-4425LS/K/W

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.

KB-3425LS/K/W

Plunger

COM

R3 R4

F-1

F-2

F-3

To connector (F) on Control Unit.

CONNECTOR

KB-4425LS/K/W

PROCEDURE LETTER

TEST PROCEDURES

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.

R1, R2 : 22Ω ± 1% 1/2W R3 : 4.3kΩ ± 5% 1/4W R4 : 1MΩ ± 5% 1/4W

Element does not heat:

Checking the system with a Voltmeter, if the element does not heat up.

1. 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.

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

ELEMENT

CONTROL SYSTEMS

Two types of surface elements control systems are covered in this manual.

1. Standard infinite switch.

2. Dual infinite switch.

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.

Troubleshooting:

There are four ways a surface control system with a standard infinite switch can fail.

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.

Contacts

Di a l P os it ion

OFF LO-MED HI

P2 - P O X X

P2 - 4 O X X

P1 - 2 O X - C X

SURFACE

O X

- open - closed

PILOT

PROCEDURE LETTER

TEST PROCEDURES

COMPONENT TEST

KB-3425LS/K/W KB-4425LS/K/W

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