Sharp KB3401LS - 30 Inch Electric Range Service Manual

Browse online or download Service Manual for Microwaves Sharp KB3401LS - 30 Inch Electric Range. kb-3401ls kb-3401lk kb-3401lw supplemental service manual User Manual

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KB-3401LS
KB-3401LK
KB-3401LW
This is a supplemental Service Manual and is quite similar to the base models KB-3300JS/JK/JW; (S74R243KB330J). This
supplemental manual must be used in conjunction with the base model service manual for complete operation, service, safety
and replacement parts information.
WARNING TO SERVICE PERSONNEL:
This service manual is intended for use by persons having electrical and mechanical training and a level of
knowledge of these subjects generally considered acceptable in the appliance repair trade. Sharp Electronics
Corporation cannot be responsible, nor assume any liability, for injury or damage of any kind arising from the
use of this manual.
Microwave ovens contain circuitry capable of producing very high voltage and current. Contact with the
following parts may result in a severe, possibly fatal, electrical shock. (High Voltage Capacitor, High Voltage
Power Transformer, High Voltage Rectifier and Heat sink etc., and Magnetron, High Voltage Harness etc..)
S76R266KB3401F
KB-3401LS
KB-3401LK
KB-3401LW
FREE STANDING RANGE
WITH MICROWAVE DRAWER
MODELS
SUPPLEMENTAL SERVICE MANUAL
TABLE OF CONTENTS
Page
PRECAUTIONS TO BE OBSERVED BEFORE AND DURING SERVICING TO
AVOID POSSIBLE EXPOSURE TO EXCESSIVE MICROWAVE ENERGY ..................... INSIDE FRONT COVER
BEFORE SERVICING ....................................................................................................... INSIDE FRONT COVER
WARNING TO SERVICE PERSONNEL ................................................................................................................. 3
MICROWAVE MEASUREMENT PROCEDURE ..................................................................................................... 5
FOREWORD AND WARNING ............................................................................................................................... 7
PRODUCT SPECIFICATIONS ............................................................................................................................... 8
POWER CONNECTION ....................................................................................................................................... 10
ANTI-TIP DEVICE ................................................................................................................................................ 12
CONTROL LAYOUT ............................................................................................................................................. 13
SCHEMATICS ...................................................................................................................................................... 14
TOUCH CONTROL PANEL ASSEMBLY .............................................................................................................. 18
OVEN/MICROWAVE DRAWER DISASSEMBLY .................................................................................................. 23
WIRING DIAGRAMS ............................................................................................................................................ 33
PRINTED WIRING BOARDS ............................................................................................................................... 39
PARTS LIST ......................................................................................................................................................... 44
PACKING AND ACCESSORIES .......................................................................................................................... 56
This document has been published to be used for after sales service only. The contents are subject to change without notice.
SHARP ELECTRONICS CORPORATION
KB-3401LW pictured
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Summary of Contents

Page 1 - SHARP ELECTRONICS CORPORATION

1KB-3401LSKB-3401LKKB-3401LWThis is a supplemental Service Manual and is quite similar to the base models KB-3300JS/JK/JW; (S74R243KB330J). This suppl

Page 2 - BEFORE SERVICING

10KB-3401LSKB-3401LKKB-3401LW208/240 VOLT CONNECTI ON INSTRUCTIONSThe rangecan be set for208Vor 2 40V. The voltagesettingfor yourrange is pre-set at 2

Page 3 - After repairing

11KB-3401LSKB-3401LKKB-3401LW3Make sure all connections are tightened securely and replacethe rear access cover. Se e Figure 7.GROUNDING INSTRUCTIONS-

Page 4 - SAFE SERVICING PRACTICES

12KB-3401LSKB-3401LKKB-3401LW2 DRILL PILOT HOLES AND FASTEN BRACKETDrill a1/8-inch pilot hole where screws are to be located. If bracketis to be moun

Page 5

13KB-3401LSKB-3401LKKB-3401LWKB-3401LSHI HILOMED MEDLOSMALL LARGEOFFCooktopHILOMEDOFFHILOMEDOFFHILOMEDOFFCooktopGLASS CERAMIC COOKTOPKEY GLASSMICROWAV

Page 6 - NOTES

14KB-3401LSKB-3401LKKB-3401LWSchematic-Off ConditionCOOK TOPNOTES:1. Circuits / wire colors are subject to change without notice.2. Terminal that is

Page 7 - SERVICE MANUAL

15KB-3401LSKB-3401LKKB-3401LWCOOK TOP SCHEMATIC (DETAIL)L2NNL1L22INSIDEOUTSIDECONTROLRIGHT FRONTSURFACEELEMENT44aS2S1P2P1H2 /22a1a2P1 / 4CONTROLH1 /4

Page 8 - OVEN SPECIFICATION

16KB-3401LSKB-3401LKKB-3401LWMICROWAVE DRAWER SCHEMATIC (DETAIL)SMOLFMB1B3RY1RY2RY5HUMIDITYSENSORNOISE SUPRESSION COILRESISTOR 470 kohm 1/2WLINE CROSS

Page 9 - ITEM DESCRIPTION

17KB-3401LSKB-3401LKKB-3401LWRANGE SCHEMATIC (DETAIL)FMCLOSS FLOWFAN MOTOROLOVEN LAMPCONV. HEATERTOP HEATERLMDOOR LOCKMOTORN.O.N.O.COM.COM.RY7RY4RY10R

Page 10 - POWER CONNECTION

18KB-3401LSKB-3401LKKB-3401LWTOUCH CONTROL PANEL ASSEMBLYOUTLINE OF TOUCH CONTROL PANELThe touch control section consists of the following units.(1) K

Page 11 - 3-WIRE CONNECTION

19KB-3401LSKB-3401LKKB-3401LW 1 AN5 IN Temperature measurement input: OVEN THERMISTOR. By inputting DC voltage corresponding to the tempera

Page 12 - ANTI-TIP DEVICE

2KB-3401LSKB-3401LKKB-3401LWPRECAUTIONS TO BE OBSERVED BEFORE AND DUR-ING SERVICING TO AVOID POSSIBLE EXPOSURE TO EXCESSIVE MICROWAVE ENERGY(a) Do no

Page 13 - KB-3401LS

20KB-3401LSKB-3401LKKB-3401LW 23 P30 OUT Signal to reset LSI. Signal is output to reset IC-2, IC-3 and IC-4. 24 - 27 COM3 - COM0 OUT Ter

Page 14 - MICROWAVE DRAWER

21KB-3401LSKB-3401LKKB-3401LW Pin No. Signal I/O Description the signals holds “H” level during microwave cook-ing and “L” level while not

Page 15 - COOK TOP SCHEMATIC (DETAIL)

22KB-3401LSKB-3401LKKB-3401LWPRECAUTIONS FOR USING LEAD-FREE SOLDER1. Employing lead-free solder The "Main PWB" of this model employs lead

Page 16 - KB-3401LK

23KB-3401LSKB-3401LKKB-3401LWControlKnobsRetainersGlass Key DecoIndicator LampsLensGND Deco ScrewOVEN / MICROWAVE DRAWER DISASSEMBLYFig. 11. Before

Page 17 - RANGE SCHEMATIC (DETAIL)

24KB-3401LSKB-3401LKKB-3401LWBack PanelSide PanelsSelect Switch12. Remove electrical cover and screws holding the select switch from back plate. T

Page 18 - TOUCH CONTROL PANEL ASSEMBLY

25KB-3401LSKB-3401LKKB-3401LWOVEN COMPONENT REMOVAL1. After dissaembly as previously stated, remove Microwave Drawer assembly by removing (2) screws

Page 19 - DESCRIPTION OF LSI (IC-1)

26KB-3401LSKB-3401LKKB-3401LW2. Open the drawer and keep it open.3. To discharge the high voltage capacitor, wait for 60 seconds.4. Remove

Page 20 - COM3 - COM0

27KB-3401LSKB-3401LKKB-3401LW1. Disconnect the power supply cord.2. Open the drawer and keep it open.3. To discharge the high voltage capacito

Page 21 - 16.7 msec

28KB-3401LSKB-3401LKKB-3401LW1. Disconnect the power supply cord.2. Open the door to the fully opened position (Fig. O-1).3. Pull the lock located

Page 22

29KB-3401LSKB-3401LKKB-3401LWOVEN BAKE ELEMENT REMOVAL1. Disconnect the power supply cord.2. Refer to the disassembly instructions as previously sta

Page 23 - GND Deco Screw

3KB-3401LSKB-3401LKKB-3401LW WARNING TO SERVICE PERSONNELRange units contain circuitry capable of producing very high voltage and current, conta

Page 24 - Control Panel Frame

30KB-3401LSKB-3401LKKB-3401LWBLOWER MOTOR REMOVAL1. Disconnect the power supply cord.2. Refer to the disassembly instructions as previously stated.

Page 25 - Back Plate

31KB-3401LSKB-3401LKKB-3401LWCONVECTION MOTOR/IMPELLER BLADE REMOVAL1. Disconnect the power supply cord.2. Refer to the disassembly instructions as

Page 26 - ADJUSTMENT

32KB-3401LSKB-3401LKKB-3401LWCOOK TOP RADIANT HEATERS/HOT SURFACE INDICATOR REMOVAL1. Disconnect the power supply cord.2. Refer to the disassembly i

Page 27 - DRAWER/SLIDE RAIL REMOVAL

33KB-3401LSKB-3401LKKB-3401LWCONTROL PANEL WIRING DIAGRAMWHTREDBLKINFINITE SWITCHES (RIGHT SIDE)PILOT LIGHT RIGHTINFINITE SWITCHES (LEFT SIDE)PILOT LI

Page 28 - Hinge Cover

34KB-3401LSKB-3401LKKB-3401LWCOOK TOP WIRING DIAGRAMYLWYLWWHTWARMER(CR)CENTER REAR1 ZONEWHTP12a(JST VLP-12V)TO INFINITE SW HARNESS(JST ELP-02V)TO DRA

Page 29 - THERMISTOR REMOVAL

35KB-3401LSKB-3401LKKB-3401LWMICROWAVE DRAWER WIRING DIAGRAMHOUSING COLOR : BLUEORGRED(FOR CONVECTION HEATER)RY-C(COM) (N.C.)(N.O.)BLKGRYWHTWHTWHTBLUB

Page 30 - LOCK MOTOR REMOVAL

36KB-3401LSKB-3401LKKB-3401LWMICROWAVE DRAWER WIRING DIAGRAM14131413STOP SW (N.O.)DOOR SW (COM)DOOR SW (N.O.)STOP SW (COM)LOCK MOTOR SW (COM)LOCK MOTO

Page 31

37KB-3401LSKB-3401LKKB-3401LWRANGE POWER SUPPLY WIRING DIAGRAMSHRINK TUBENO.07NO.08(VERSAFIT V2)BLKRED(LEFT)(L1)(RIGHT)(L2)BLK REDBLKBLKBLKREDREDRED65

Page 32

38KB-3401LSKB-3401LKKB-3401LWRANGE WIRING DIAGRAMUL TAPEDOOR SW(COM.)(N.O.)BLKREDREDBLKBLKREDUL TAPEUL TAPEUL TAPEUL TAPE(N.O.)(N.C.)OVEN LAMPWHTWHTOR

Page 33 - CONTROL PANEL WIRING DIAGRAM

39KB-3401LSKB-3401LKKB-3401LW64 512364 5123ABCDEFGHABCDEFGHFigure S-2. Power Unit Circuit

Page 34 - COOK TOP WIRING DIAGRAM

4KB-3401LSKB-3401LKKB-3401LWATTENTION!!!This service manual is intended for use by persons having electrical and mechanical trainingand a level of kno

Page 35

40KB-3401LSKB-3401LKKB-3401LW64 512364 5123ABCDEFGHABCDEFGHFigure S-3. Control Unit Circuit

Page 36

41KB-3401LSKB-3401LKKB-3401LW64 512364 5123ABCDEFGHABCDEFGHFigure S-4. Printed Wiring Board of Power UnitQPWBFA844DRZZFA844S047081CNE1716RY4RY2RY6RY7R

Page 37

42KB-3401LSKB-3401LKKB-3401LW64 512364 5123ABCDEFGHABCDEFGHFigure S-5. Printed Wiring Board of Control UnitE16BCQ7S1S23C1C4S24R40C4C5C3C0C6C3C5C8Q4Q3I

Page 38 - RANGE WIRING DIAGRAM

43KB-3401LSKB-3401LKKB-3401LW64 512364 5123ABCDEFGHABCDEFGHFigure S-5. Printed Wiring Board of Keyboard UnitFA842S03C183FA842S03C183BakeSTARTSTOPCLEAR

Page 39

44KB-3401LSKB-3401LKKB-3401LWCONTROL PANEL PARTS LISTNote: The parts marked “∆” may cause undue microwave exposure. The parts marked “*” are used in

Page 40

45KB-3401LSKB-3401LKKB-3401LW64 512364 5123ABCDEFGHABCDEFGHCONTROL PANELCONTROL PANEL HARNESS1-71-71-71-51-11-121-81-81-161-121-191-21-111-141-111-121

Page 41

46KB-3401LSKB-3401LKKB-3401LWCOOK TOP PARTS LISTNote: The parts marked “∆” may cause undue microwave exposure. The parts marked “*” are used in volta

Page 42

47KB-3401LSKB-3401LKKB-3401LW64 512364 5123ABCDEFGHABCDEFGHCOOK TOP HARNESSCOOK TOPActual wire harness may be different from illustration.2-12-22-42-5

Page 43 - (Control Lock)

48KB-3401LSKB-3401LKKB-3401LWMICROWAVE DRAWER PARTS LISTNote: The parts marked “∆” may cause undue microwave exposure. The parts marked “*” are used

Page 44 - CONTROL PANEL PARTS LIST

49KB-3401LSKB-3401LKKB-3401LW REF. NO. PART NO. § DESCRIPTION Q'TY CODE3-58 JHNDPB052MRM0 M Door handle [KB3401LS] 1 AS3-58 JHNDPB0

Page 45 - CONTROL PANEL

5KB-3401LSKB-3401LKKB-3401LWMICROWAVE MEASUREMENT PROCEDURE A. Requirements:1) Microwave leakage limit (Power density limit): The power den

Page 46 - COOK TOP PARTS LIST

50KB-3401LSKB-3401LKKB-3401LWMICROWAVE DRAWER64 512364 5123ABCDEFGHABCDEFGHMICROWAVE DRAWER HARNESSESActual wire harness may be different from illustr

Page 47 - COOK TOP

51KB-3401LSKB-3401LKKB-3401LWMICROWAVE DRAWER HARNESSESOVEN PARTS LISTNote: The parts marked “∆” may cause undue microwave exposure. The parts marked

Page 48 - MICROWAVE DRAWER PARTS LIST

52KB-3401LSKB-3401LKKB-3401LW64 512364 5123ABCDEFGHABCDEFGHOVEN UNIT HARNESSESOVEN UNIT4-42Actual wire harness may be different from illustration.4-40

Page 49

53KB-3401LSKB-3401LKKB-3401LWOVEN UNIT HARNESSESOVEN DOOR PARTS LISTNote: The parts marked “∆” may cause undue microwave exposure. The parts marked “

Page 50

54KB-3401LSKB-3401LKKB-3401LW64 512364 5123ABCDEFGHABCDEFGH5-15-35-25-45-45-4OVEN DOOR

Page 51 - OVEN PARTS LIST

55KB-3401LSKB-3401LKKB-3401LWPACKING PARTS LISTNote: The parts marked “∆” may cause undue microwave exposure. The parts marked “*” are used in voltag

Page 52 - OVEN UNIT

56KB-3401LSKB-3401LKKB-3401LWPACKINGSUPPORT CORNERSEXTENDED RACK ASSY x 2BOILER PANINSTALLION MANUALOPERATION MANUALANTI-TIP TEMPLATEANTI-TIP KITPACK

Page 53 - OVEN DOOR PARTS LIST

57KB-3401LSKB-3401LKKB-3401LWNOTES

Page 54 - OVEN DOOR

58KB-3401LSKB-3401LKKB-3401LWNOTES

Page 55 - PACKING PARTS LIST

59KB-3401LSKB-3401LKKB-3401LWNOTES

Page 56 - Non-replaceable items

6KB-3401LSKB-3401LKKB-3401LW NOTES

Page 57

60KB-3401LSKB-3401LKKB-3401LW2005 SHARP CORP. (6R2.00E) Printed in U.S.ACOPYRIGHT © 2006 BY SHARP CORPORATIONALL RIGHTS RESERVED.No part of this publi

Page 58

7KB-3401LSKB-3401LKKB-3401LWSHARP ELECTRONICS CORPORATIONSHARP PLAZA, MAHWAH,NEW JERSEY 07430-2135SERVICE MANUALFREE STANDING RANGEWITH MICROWAVE DRAW

Page 59

8KB-3401LSKB-3401LKKB-3401LW ITEM DESCRIPTIONPower Requirements 120 /208 - 120/240Volts / 46/50 Amperes 60 Hertz Single phase, 3 wire

Page 60

9KB-3401LSKB-3401LKKB-3401LW ITEM DESCRIPTIONPower Output 1000 watts (IEC TEST PROCEDURE) Operating frequency of 2450MHzCooking Cavit

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