Sharp R-408LS Service Manual

PRECAUTIONS TO BE OBSERVED BEFORE ANDDURING SERVICING TO AVOID POSSIBLE EXPO-SURE TO EXCESSIVE MICROWAVE ENERGYBEFORE SERVICINGCHAPTER 1. WARNING TO S

R408LS6 – 1R408LSService Manual CHAPTER 6. OPERATION[1] DESCRIPTION OF OPERATING SEQUENCE The following is a description of component functions during

R408LS6 – 2[2] OVEN SCHEMATIC1. Off Condition Figure O-1. Oven Schematic-

R408LS6 – 3[3] DESCRIPTION AND FUNCTION OF COMPONENTS1. DOOR OPEN MECHANISMThe door is opened by pushing the open button on the control panel,refer to

R408LS7 – 1R408LSService Manual CHAPTER 7. TROUBLESHOOTING GUIDE When troubleshooting the microwave oven, it is helpful to follow the Sequence of Oper

R408LS8 – 1R408LSService Manual CHAPTER 8. TEST PROCEDURES[1] A: MAGNETRON ASSEMBLY TEST1. Disconnect the power supply cord, and then remove outer cas

R408LS8 – 25. Reconnect all leads removed from components during testing.6. Reinstall the outer case (cabinet).7. Reconnect the power supply cord afte

R408LS8 – 3[7] F: SECONDARY INTERLOCK SYSTEM TEST1. DOOR SENSING SWITCH1. Disconnect the power supply cord, and then remove outer case.2. Open the doo

R408LS8 – 4[9] H: BLOWN MONITOR FUSE TEST1. Disconnect the power supply cord, and then remove outer case.2. Open the door and block it open.3. Dischar

R408LS8 – 51) In connection with pads.a) When touching the pads, a certain group of pads do not produce a signal.b) When touching the pads, no pads pr

R408LS8 – 63. Discharge high voltage capacitor.4. Disconnect the leads to the primary of the power transformer.5. Ensure that these leads remain isola

CONTENTSPRECAUTIONS TO BE OBSERVED BEFOREAND DURING SERVICING TO AVOID POSSIBLEEXPOSURE TO EXCESSIVE MICROWAVE ENER-GYBEFORE SERVICINGCHAPTER 1. WARNI

R408LS8 – 75) Make a visual inspection of the varistor. Check for burned damage and examinethe transformer with a tester for the presence of layer sho

R408LS9 – 1R408LSService Manual CHAPTER 9. TOUCH CONTROL PANEL ASSEMBLY[1] OUTLINE OF TOUCH CONTROL PANEL The touch control section consists of the fo

R408LS9 – 22. Servicing the touch control panel with power supply from an exter-nal power source:Disconnect the touch control panel completely from th

R408LS10 – 1R408LSService Manual CHAPTER 10. PRECAUTIONS FOR USING LEAD-FREE SOLDER[1] Employing lead-free solderThe “Main PWB” of this model employs

R408LS11 – 1R408LSService Manual CHAPTER 11. COMPONENT REPLACEMENT AND ADJUSTMENT PROCE-DURE[1] WARNINGSPlease refer to “OVEN PARTS, CABINET PARTS, CO

R408LS11 – 2[2] OUTER CASE REMOVALTo remove the outer case, procedure as follows.1. Disconnect the power supply cord.2. Open the oven door and block i

R408LS11 – 35. Reinstall outer case and check that the oven is operating properly. CAUTION: WHEN REPLACING MAGNETRON, BE SURE THE R.F.GASKET IS IN PLA

R408LS11 – 45. Install the fan motor assembly to the oven cavity back plate withtwo (2) screws. 6. Connect the wire leads to the magnetron and fan mot

R408LS11 – 5[12] DOOR SENSING SWITCH/PRIMARY INTERLOCK SWITCH AND MONITOR SWITCHREMOVAL1. REMOVAL1. Disconnect the power supply cord and remove outer

R408LS11 – 6Figure C-4. Door Disassembly12.Slide latch head upward and remove it from door frame with releas-ing latch spring from door frame and latc

R408LSiR408LSService Manual PRECAUTIONS TO BE OBSERVED BEFORE AND DURING SERVICING TO AVOIDPOSSIBLE EXPOSURE TO EXCESSIVE MICROWAVE ENERGYBEFORE SERVI

R408LS12 – 1R408LSService Manual CHAPTER 12. CIRCUIT DIAGRAMS[1] Pictorial Diagram (Figure S-1)Figure S-1. Pictorial DiagramHIGHVOLTAGECAPACITORH.V. R

R408LS12 – 2[2] Control Panel Circuit (Figure S-2)Figure S-2. Control Panel Circuit LCD (RLCDSA155DR ZZ)R6815KR6915KR7015K15KR7215KR74㨪R78:270Kx5C60㨪C

R408LS12 – 3[3] Printed Wiring Board (Figure S-3)Figure S-3. Printed Wiring Board

PARTS LISTThis document has been published to be usedfor after sales service only.The contents are subject to change without notice.R408LSMICROWAVE OV

R408LS 2[1] OVEN PARTS2-11-64-156-34-134-116-41-104-34-54-76-26-12-27-11-124-107-37-34-11-137-97-57-117-67-87-84-47-101-54-87-71-41-44-67-84-21-91-82-

R408LS3NO. PARTS CODEPRICE RANKNEW MARKPART RANKDESCRIPTION[1] OVEN PARTSELECTRIC PARTS1-1 FPWBFA417WRKZ AY Noise filter assembly1-1 FPWBFA389WRKZ AW

R408LS 4[2] DOOR AND CONTROL PANEL PARTSActual wire harness may be different from illustration.6-66-55-65-75-33-36-73-25-3-15-3-25-25-55-95-95-95-45-8

R408LS5NO. PARTS CODEPRICE RANKNEW MARKPART RANKDESCRIPTION[2] DOOR AND CONTROL PANEL PARTSCONTROL PANEL PARTS3-1 DPNLCC019WRKZ BF Panel med assembly3

R408LS6INDEXPARTS CODE No.PRICE RANKNEW MARKPART RANK[ D ]DPNLCC019WRKZ 2-3-1 BFDPWBFC563WRKZ 2-3-2 BK[ F ]FACCDA083WRE0 1-1-7 AQFACCDA085WREZ 1-1-7

R408LS1 – 1R408LSService Manual CHAPTER 1. WARNING TO SERVICE PERSONNELMicrowave ovens contain circuitry capable of producing very high voltage and cu

EndPageCOPYRIGHT © 2006 BY SHARP CORPORATIONALL RIGHTS RESERVED.No part of this publication may be reproduced, storedin retrieval systems, or transmit

R408LS2 – 1R408LSService Manual CHAPTER 2. MICROWAVE MEASUREMENT PROCEDURE[1] Requirements:1. Microwave leakage limit (Power density limit): The power

R408LS3 – 1R408LSService Manual CHAPTER 3. FOREWORD AND WARNING[1] FOREWORDThis Manual has been prepared to provide Sharp Electronics Corp. Service Pe

R408LS4 – 1R408LSService Manual CHAPTER 4. PRODUCT DESCRIPTION[1] SPECIFICATIONSITEM DESCRIPTIONPower Requirements120 Volts 60 HertzSingle phase, 3 wi

R408LS5 – 1R408LSService Manual CHAPTER 5. GENERAL INFORMATION[1] GROUNDING INSTRUCTIONSThis oven is equipped with a three prong grounding plug. It mu

R408LS5 – 22. TOUCH CONTROL PANELNOTE: Some one-touch cooking features such as “MINUTE PLUS” are disabled after three minutes when the oven is not in