Sharp KB5121KW - Microwave Service Manual

1KB-5121KS/K/WWARNING TO SERVICE PERSONNEL:This service manual is intended for use by persons having electrical and mechanical training and a level of

8KB-5121KS/K/W ADJUST ANTI-TIP BRACKETMeasure the thickness of the counter. See Figure 6. Locate the Anti-Tip Bracket on the backside of the appliance

9KB-5121KS/K/WKB-5121KS

10KB-5121KS/K/WSchematic-Off ConditionNOTES:1. Circuits / wire colors are subject to change without notice.2. Terminal that is located on the right

11KB-5121KS/K/WCOOK TOP SCHEMATIC (DETAIL)L2NL1L22INSIDEOUTSIDECONTROLRIGHT FRONTSURFACEELEMENT44aS2S1P2P1H2/ 22a1a2P1/ 4CONTROLPL2/P1PROTECTORCONTROL

12KB-5121KS/K/WMICROWAVE DRAWER SCHEMATIC (DETAIL)HUMIDITYSENSORNOISE SUPRESSION COILRESISTOR 470 kW 1/2WLINE CROSS CAPACITOR 1.0 " F250VLINE BYP

13KB-5121KS/K/WTEST PROCEDURESPROCEDURELETTERCOMPONENT TESTThe touch control panel consists of circuits including semiconductors such as LSI, ICs, etc

14KB-5121KS/K/W1. Disconnect the power source, and then disassemble as per "COOK TOP/MICROWAVE DRAWERDISASSEMBLY" page 32.2. Open the drawer

15KB-5121KS/K/WTEST PROCEDURESPROCEDURELETTERCOMPONENT TESTWARNING : The unit should be fully assembled before following procedure.(1) Place one cup o

16KB-5121KS/K/WSTEPS OCCURRENCE CAUSE OR CORRECTION1 The rated AC voltage is not present between Check supply voltage and oven power cord.Pin Nos. 1an

17KB-5121KS/K/WPlungerNCNOCOMCOMNONCR3 R4R1R2123F-1F-2F-3To connector (F)on Control Unit.CONNECTORTEST PROCEDURESPROCEDURELETTERCOMPONENT TEST(5) Inst

2KB-5121KS/K/WPRECAUTIONS TO BE OBSERVED BEFORE AND DUR-ING SERVICING TO AVOID POSSIBLE EXPOSURE TOEXCESSIVE MICROWAVE ENERGY(a) Do not operate or all

18KB-5121KS/K/WElement does not heat:Checking the system with a Voltmeter, if the elementdoes not heat up.1. Remove the back of the control panel toex

19KB-5121KS/K/Wbetween the switch and the element are open.If the meter reads line to line voltage theelement is defective.Element does not cycle:If t

20KB-5121KS/K/WBoth elements do not heat:Checking the system with a Voltmeter, if the elementsdo not heat up:1. Remove the back panel of the backguard

21KB-5121KS/K/W1. Disconnect the power source.2. Open the drawer and keep it open.3. To discharge high voltage capacitor, wait for 60 seconds.4. To te

22KB-5121KS/K/WMMOONNIITTOORRSSWWIITTCCHHIINNTTEERRLLOOCCKKSSWWIITTCCHHSSEECCOONNDDAARRYY ((BBLLKK)) ((BBRRNN,,GGRRYY))

23KB-5121KS/K/WTEST PROCEDURESPROCEDURELETTERCOMPONENT TESTN POWER TRANSFORMER TEST1. Disconnect the power source.2. Open the drawer and block it open

24KB-5121KS/K/WTOUCH CONTROL PANEL ASSEMBLYOUTLINE OF TOUCH CONTROL PANELThe touch control section consists of the following units.(1) Keyboard unit(2

25KB-5121KS/K/W1 P96 IN Signal coming from Transparent electrode (touch key on the LCD).When the 1 key of the transparent electrode is touched, a co

26KB-5121KS/K/W20 INT0 IN Signal to synchronize LSI with commercial power source frequency.This is the basic timing for all real time processing of LS

27KB-5121KS/K/WPin No. Signal I/O Description47 P47 OUT Reset signal is outout to the LCD.48 CS2 OUT Chip select signal is outout to the LCD.49 P45 OU

1KB-5121KS/K/W WARNING TO SERVICE PERSONNELRange units contain circuitry capable of producing very high voltage and current, contactwith followi

28KB-5121KS/K/WPin No. Signal I/O Description“L” level: During fan motor OFF.90 AN6 IN AH sensor input.This input is an analog input terminal from the

29KB-5121KS/K/W(1) Structure of Humidity SensorThe humidity sensor includes two thermistors as shownin the illustration. One thermistor is housed in t

30KB-5121KS/K/W1. Precautions for Handling Electronic ComponentsThis unit uses CMOS LSI in the integral part of thecircuits. When handling these parts

31KB-5121KS/K/WPRECAUTIONS FOR USING LEAD-FREE SOLDER1. Employing lead-free solderThe "Main PWB" of this model employs lead-free solder. Thi

32KB-5121KS/K/WControl KnobsRetainersGlass Key DecoIndicator LampsLensGND Deco ScrewCOOK TOP / MICROWAVE DRAWER DISASSEMBLYFig. 11. Before removing C

33KB-5121KS/K/W10. Remove screws from Control Panel Frame (Fig 4).11. Slide Cook Top forward to unlock from shoulder screws, then remove or repo

34KB-5121KS/K/W1. Disconnect the power source.2. Open the drawer and keep it open.3. To discharge the high voltage capacitor, wait for 60seconds.4. Re

35KB-5121KS/K/WDRAWER ASSEMBLY AND CHOKE REMOVAL1. Disconnect the power source.2. Open the drawer and keep it open.3. To discharge the high voltage ca

36KB-5121KS/K/WSWITCH ANGLE REMOVAL(Locate either the right or left switch angle)1. Follow the Microwave Drawer disassembly as previously stated.2. Op

37KB-5121KS/K/WAUTO DRAWER GEAR REMOVAL1. Follow the Microwave Drawer disassembly as previously stated.2. Open the drawer and keep it open.3. To disch

2KB-5121KS/K/WATTENTION!!!This service manual is intended for use by persons having electrical and mechanical trainingand a level of knowledge of thes

38KB-5121KS/K/WCOOK TOP RADIANT HEATERS/HOT SURFACE INDICATOR REMOVAL1. Disconnect the power source.2. Refer to the disassembly instructions as previo

39KB-5121KS/K/WCONTROL PANEL WIRING DIAGRAMWHTREDBLKINFINITE SWITCHES (RIGHT SIDE)PILOT LIGHT RIGHTINFINITE SWITCHES (LEFT SIDE)PILOT LIGHT LEFT REDBL

40KB-5121KS/K/WCOOK TOP WIRING DIAGRAMYLWYLWWHTWARMER(CR)CENTER REAR1 ZONEWHTP12a(JST VLP-12V)TO INFINITE SW HARNESS(JST ELP-02V)TO DRAWER HARNESS121

41KB-5121KS/K/WMICROWAVE DRAWER WIRING DIAGRAMTO LOADNOISE FILTER(AMP 316086-1)DC COOLING FANOVEN LAMPTO CPU HARNESSSTIRRERFRONT(JST XMR-05V)TO CPU CN

42KB-5121KS/K/W645123645123ABCDEFGHABCDEFGHFigure S-2. Power Unit Circuit

43KB-5121KS/K/W645123645123ABCDEFGHABCDEFGHFigure S-3. Control Unit Circuit

44KB-5121KS/K/W645123645123ABCDEFGHABCDEFGHFigure S-4. Printed Wiring Board of Power UnitQPWBFA844DRZZFA844S047081CNE1716RY4RY2RY6RY7RY8VRS1D13CNACNJ1

45KB-5121KS/K/W645123645123ABCDEFGHABCDEFGHFigure S-5. Printed Wiring Board of Control UnitQPWBFA851DRZZLD1 LD2R29R107C101R106C100R108R113R114C108R119

46KB-5121KS/K/W645123645123ABCDEFGHABCDEFGHFigure S-5. Printed Wiring Board of Keyboard UnitQPWBFA850DRZZC80C70C74C70C81R76R72R73R77R78R79C78C75C77C76

47KB-5121KS/K/WCONTROL PANEL PARTS LISTNote: The parts marked “ΔΔΔΔΔ” may cause undue microwave exposure.The parts marked “*” are used in voltage more

3KB-5121KS/K/WMICROWAVE MEASUREMENT PROCEDUREA. Requirements:1) Microwave leakage limit (Power density limit): The power density of microwave radiatio

48KB-5121KS/K/W645123645123ABCDEFGHABCDEFGHCONTROL PANEL1-71-71-71-51-11-111-201-201-151-111-191-181-21-101-131-101-91-91-91-171-161-161-91-91-141-31-

49KB-5121KS/K/WCOOK TOP PARTS LISTNote: The parts marked “ΔΔΔΔΔ” may cause undue microwave exposure.The parts marked “*” are used in voltage more than

50KB-5121KS/K/W645123645123ABCDEFGHABCDEFGH2-7Actual wire harness may be different from illustration.2-12-62-122-122-22-42-52-112-32-92-42-92-102-142-

51KB-5121KS/K/WMICROWAVE DRAWER PARTS LISTNote: The parts marked “ΔΔΔΔΔ” may cause undue microwave exposure.The parts marked “*” are used in voltage m

52KB-5121KS/K/WREF. NO. PART NO. § DESCRIPTION Q'TY CODE3-59 FGLSPB002MRY0 M Oven tray assy 1 BC3-60 GCOVHB052MRF0 M Choke cover 1 AT3-61 PDIF-B0

53KB-5121KS/K/W645123645123ABCDEFGHABCDEFGHMICROWAVE DRAWERActual wire harness may be different from illustration.3-473-33-123-183-363-573-543-93-23-1

54KB-5121KS/K/WBOTTOM COVER PARTS LISTNote: The parts marked “ΔΔΔΔΔ” may cause undue microwave exposure.The parts marked “*” are used in voltage more

55KB-5121KS/K/WPACKINGPACKING PARTS LISTNote: The parts marked “ΔΔΔΔΔ” may cause undue microwave exposure.The parts marked “*” are used in voltage mor

56KB-5121KS/K/WNOTES

57KB-5121KS/K/WNOTES

4KB-5121KS/K/W NOTES

58KB-5121KS/K/W2005 SHARP CORP. (5R2.00E) Printed in U.S.ACOPYRIGHT © 2005 BY SHARP CORPORATIONALL RIGHTS RESERVED.No part of this publication may be

5KB-5121KS/K/WSHARP ELECTRONICS CORPORATIONSHARP PLAZA, MAHWAH,NEW JERSEY 07430-2135SERVICE MANUALCOOK TOPWITHMICROWAVE DRAWERKB-5121KS / KB-5121KK /

6KB-5121KS/K/WITEM DESCRIPTIONPower Output 1000 watts (IEC TEST PROCEDURE)Operating frequency of 2450MHzCooking Cavity Dimensions Width 17-11/32Hei

7KB-5121KS/K/WPOWER CONNECTIONNote: This appliance must be properly groundedAttention Installer: This appliance must be hard wired (direct wired) into