Sharp KB6002LK Service Manual

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1
KB-6002LS
KB-6002LK
KB-6002LW
In the interest of user-safety the unit should be restored to its original condition and only parts identical to those specifi ed 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 Rectifi er and Heat sink etc., and Magnetron, High Voltage Harness etc..)
S76R265KB6002
KB-6002LS
KB-6002LK
KB-6002LW
MICROWAVE DRAWER
MODELS
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 ..................................................................................................... 4
FOREWORD AND WARNING ............................................................................................................................... 5
PRODUCT SPECIFICATIONS ............................................................................................................................... 6
SCHEMATICS ...................................................................................................................................................... 10
TEST PROCEDURES .......................................................................................................................................... 11
TOUCH CONTROL PANEL ASSEMBLY .............................................................................................................. 19
MICROWAVE DRAWER DISASSEMBLY ............................................................................................................. 27
WIRING DIAGRAMS ............................................................................................................................................ 31
PRINTED WIRING BOARDS ............................................................................................................................... 32
PARTS LIST ......................................................................................................................................................... 36
PACKING AND ACCESSORIES .......................................................................................................................... 41
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-6002LW pictured
Sensor
Mic ro wa ve Dr aw er
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Summary of Contents

Page 1 - SHARP ELECTRONICS CORPORATION

1KB-6002LSKB-6002LKKB-6002LWIn the interest of user-safety the unit should be restored to its original condition and only parts identical to those spe

Page 2 - BEFORE SERVICING

10KB-6002LSKB-6002LKKB-6002LWHUMIDITYSENSORNOISE SUPRESSIONCOILRESISTOR 470 k? 1/2WLINECROSS CAPACITOR 1.0?F275VLINEBYPASSCAPACITOR0.0033 ? F 250VFUSE

Page 3 - After repairing

11KB-6002LSKB-6002LKKB-6002LWTEST PROCEDURES PROCEDURE LETTER COMPONENT TEST unlike conventional microwave ovens, proper maintenance cannot be pe

Page 4

12KB-6002LSKB-6002LKKB-6002LW C RELAY TEST4) Reconnect all leads removed from components during testing.5) Re-install the covers.6) Reconnect the

Page 5 - SERVICE MANUAL

13KB-6002LSKB-6002LKKB-6002LWWARNING : The oven should be fully assembled before following procedure.(1) Place one cup of water in the center of the

Page 6 - ITEM DESCRIPTION

14KB-6002LSKB-6002LKKB-6002LWWARNING : The oven should be fully assembled before following procedure.(1) The oven should be plugged in at least two m

Page 7 - Key Sheet

15KB-6002LSKB-6002LKKB-6002LWTEST PROCEDURES PROCEDURE LETTER COMPONENT TEST 9-2. Place the container on the center of tray in the oven cavity.

Page 8 - OPERATION

16KB-6002LSKB-6002LKKB-6002LW2. Open the drawer and keep it open.3. To discharge high voltage capacitor, wait for 60 seconds.4. To test for an open

Page 9 - SENSOR COOKING CONDITION

17KB-6002LSKB-6002LKKB-6002LW2. Open the drawer and keep it open.3. To discharge high voltage capacitor, wait for 60 seconds.4. Isolate the switc

Page 10 - Schematic (cloSed condition)

18KB-6002LSKB-6002LKKB-6002LWTEST PROCEDURES PROCEDURE LETTER COMPONENT TEST M POWER TRANSFORMER TEST1. Disconnect the power supply cord.2.

Page 11 - TEST PROCEDURES

19KB-6002LSKB-6002LKKB-6002LWTOUCH CONTROL PANEL ASSEMBLYOUTLINE OF TOUCH CONTROL PANELThe touch control section consists of the following units.(1) K

Page 12

2KB-6002LSKB-6002LKKB-6002LWPRECAUTIONS TO BE OBSERVED BEFORE AND DUR-ING SERVICING TO AVOID POSSIBLE EXPOSURE TO EXCESSIVE MICROWAVE ENERGY(a) Do no

Page 13

20KB-6002LSKB-6002LKKB-6002LW 1 - 3 AN5- AN3 IN Terminal to change cooking input according to the Model. By using A/D converter contained i

Page 14

21KB-6002LSKB-6002LKKB-6002LW 27 COM0 OUT Common data signal. Connected to LCD signal C4. 28 VL3 IN Connected VC (+5V). 29 - 31 P27-

Page 15

22KB-6002LSKB-6002LKKB-6002LW Pin No. Signal I/O Description 47 P05 OUT Magnetron high-voltage circuit driving signal. To turn on and o

Page 16

23KB-6002LSKB-6002LKKB-6002LW(1) Structure of Humidity Sensor The humidity sensor includes two thermistors as shown in the illustration. One thermist

Page 17

24KB-6002LSKB-6002LKKB-6002LW1. Precautions for Handling Electronic Components This unit uses CMOS LSI in the integral part of the circuits. When ha

Page 18

25KB-6002LSKB-6002LKKB-6002LWPRECAUTIONS FOR USING LEAD-FREE SOLDER1. Employing lead-free solder The "Main PWB" of this model employs lead

Page 19 - TOUCH CONTROL PANEL ASSEMBLY

26KB-6002LSKB-6002LKKB-6002LWmay result in severe, possibly fatal, electric shock.(Example)High Voltage Capacitor, Power Transformer, Magnetron, H

Page 20 - DESCRIPTION OF LSI (IC-1)

27KB-6002LSKB-6002LKKB-6002LWBack coverExhaust ductscrewsTop plateRight side panelLeft side panelAir coverCavityMICROWAVE DRAWER DISASSEMBLYFig. 11.

Page 21

28KB-6002LSKB-6002LKKB-6002LWAt this point, you will have access to all parts of the Microwave Drawer. 7. To remove the Control Panel Frame Assembl

Page 22 - Other cooking mode

29KB-6002LSKB-6002LKKB-6002LW stated 2. Open the drawer and keep it open.3. To discharge the high voltage capacitor, wait for 60 seconds

Page 23 - HUMIDITY SENSOR CIRCUIT

3KB-6002LSKB-6002LKKB-6002LW WARNING TO SERVICE PERSONNELRange units contain circuitry capable of producing very high voltage and current, conta

Page 24 - TOUCH CONTROL PANEL SERVICING

30KB-6002LSKB-6002LKKB-6002LW1. Follow the Microwave Drawer disassembly as previously stated 2. Open the drawer and keep it open.3. To discha

Page 25 - KB-6002LW

31KB-6002LSKB-6002LKKB-6002LWMICROWAVE DRAWER WIRING DIAGRAMGRNGRNGRNGRNEARTHEXSTOP SWGRNGRYWHTWHTWHTREDREDORGORGORGRY-1RY-2(UPPER SIDE)(UPPER SIDE)(C

Page 26 - WARNING FOR WIRING

32KB-6002LSKB-6002LKKB-6002LW64 512364 5123ABCDEFGHABCDEFGHFigure S-2. Power Unit Circuit

Page 27 - MICROWAVE DRAWER DISASSEMBLY

33KB-6002LSKB-6002LKKB-6002LW64 512364 5123ABCDEFGHABCDEFGHFigure S-3. Control Unit Circuit

Page 28 - POWER CORD REPLACEMENT

34KB-6002LSKB-6002LKKB-6002LW64 512364 5123ABCDEFGHABCDEFGHFigure S-4. Printed Wiring Board of Power Unit2.5A312FUSET148D3ZD1J10RY1D12RY5DIPCNHQ1R1D2D

Page 29 - ADJUSTMENT

35KB-6002LSKB-6002LKKB-6002LW64 512364 5123ABCDEFGHABCDEFGHFigure S-5. Printed Wiring Board of Control Unit7878656Q7LCDCNECNNR40CF111 5 3B C E51343421

Page 30 - DRAWER/SLIDE RAIL REMOVAL

36KB-6002LSKB-6002LKKB-6002LWCONTROL PANELCONTROL PANEL PARTS LISTNote: The parts marked “∆” may cause undue microwave exposure. The parts marked “*”

Page 31

37KB-6002LSKB-6002LKKB-6002LWBOTTOM COVER PARTS LISTNote: The parts marked “∆” may cause undue microwave exposure. The parts marked “*” are used in v

Page 32

38KB-6002LSKB-6002LKKB-6002LWMICROWAVE DRAWER PARTS LISTNote: The parts marked “∆” may cause undue microwave exposure. The parts marked “*” are used

Page 33

39KB-6002LSKB-6002LKKB-6002LW REF. NO. PART NO. § DESCRIPTION Q'TY CODE3-59 FGLSPB002MRY0 M Oven tray assy 1 BK3-60 GCOVHB061MRF0 M

Page 34

4KB-6002LSKB-6002LKKB-6002LWMICROWAVE MEASUREMENT PROCEDURE A. Requirements:1) Microwave leakage limit (Power density limit): The power dens

Page 35

40KB-6002LSKB-6002LKKB-6002LW64 512364 5123ABCDEFGHABCDEFGHMICROWAVE DRAWER HARNESSESMICROWAVE DRAWERActual wire harness may be different from illustr

Page 36 - CONTROL PANEL PARTS LIST

41KB-6002LSKB-6002LKKB-6002LWPACKING PARTS LISTNote: The parts marked “∆” may cause undue microwave exposure. The parts marked “*” are used in voltag

Page 37 - BOTTOM COVER PARTS LIST

42KB-6002LSKB-6002LKKB-6002LWnoteS

Page 38 - MICROWAVE DRAWER PARTS LIST

43KB-6002LSKB-6002LKKB-6002LWnoteS

Page 39

44KB-6002LSKB-6002LKKB-6002LW2006 SHARP CORP. Printed in U. S. ACOPYRIGHT © 2006 BY SHARP CORPORATIONALL RIGHTS RESERVED.No part of this publication m

Page 40 - MICROWAVE DRAWER

5KB-6002LSKB-6002LKKB-6002LWSHARP ELECTRONICS CORPORATIONSHARP PLAZA, MAHWAH,NEW JERSEY 07430-2135SERVICE MANUALMICROWAVE DRAWERKB-6002LSKB-6002LK / K

Page 41 - PACKING PARTS LIST

6KB-6002LSKB-6002LKKB-6002LW ITEM DESCRIPTIONPower Requirments 120 Volts 14.5 Amperes, 1000 watts 60 Hz Single phase, 3 wire grounded

Page 42

7KB-6002LSKB-6002LKKB-6002LWKB-6002LWGENERAL INFORMATIONGROUNDING INSTRUCTIONSThis oven is equipped with a three prong grounding plug. It must be plug

Page 43

8KB-6002LSKB-6002LKKB-6002LWOPERATIONDESCRIPTION OF OPERATING SEQUENCE The following is a description of component functions dur-ing oven operation.OF

Page 44

9KB-6002LSKB-6002LKKB-6002LW SENSOR COOKING CONDITIONUsing the SENSOR function, food is cooked without figur-ing time, power level or quantity. When

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