Sharp R-305MR Service Manual

PRECAUTIONS TO BE OBSERVED BEFORE ANDDURING SERVICING TO AVOID POSSIBLE EXPO-SURE TO EXCESSIVE MICROWAVE ENERGYCHAPTER 1. WARNING TO SERVICE PERSONNEL

R305MR6 – 1R305MRService Manual CHAPTER 6. OPERATION[1] DESCRIPTION OF OPERATING SEQUENCE The following is a description of component functions during

R305MR6 – 2[2] OVEN SCHENATIC1. Off Condition Figure O-1. Oven Schematic-

R305MR6 – 3[3] DESCRIPTION AND FUNCTION OF COMPONENTS1. DOOR OPEN MECHANISMThe door is opened by pushing the open button on the control panel,refer to

R305MR7 – 1R305MRService Manual CHAPTER 7. TROUBLESHOOTING GUIDE Never touch any part in the circuit with your hand or an uninsulated tool whi

R305MR8 – 1R305MRService Manual CHAPTER 8. TEST PROCEDURES[1] A: MAGNETRON ASSEMBLY TEST1. Disconnect the power supply cord, and then remove outer cas

R305MR8 – 26. Reinstall the outer case (cabinet).7. Reconnect the power supply cord after the outer case is installed.8. Run the oven and check all fu

R305MR8 – 32. Open the door and block it open.3. Discharge high voltage capacitor.4. Isolate the switch and connect the ohmmeter to the common (COM.)

R305MR8 – 4If the monitor fuse is blown by improper switch operation, the monitor fuse and monitor switch must be replaced with “monitor fuse and moni

R305MR8 – 5d) 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 ind

R305MR8 – 6[13] L: RELAY TEST1. Disconnect the power supply cord, and then remove outer case.2. Open the door and block it open.3. Discharge high volt

CONTENTSPRECAUTIONS TO BE OBSERVED BEFOREAND DURING SERVICING TO AVOID POSSIBLEEXPOSURE TO EXCESSIVE MICROWAVE ENER-GYCHAPTER 1. WARNING TO SERVICE PE

R305MR8 – 75) Make a visual inspection of the varistor. Check for burned damage and examine the trans-former with a tester for the presence of layer s

R305MR9 – 1R305MRService Manual CHAPTER 9. TOUCH CONTROL PANEL ASSEMBLY[1] OUTLINE OF TOUCH CONTROL PANEL The touch control section consists of the fo

R305MR9 – 2[2] SERVICING FOR TOUCH CONTROL PANEL1. Precautions for Handling Electronic ComponentsThis unit uses CMOS LSI in the integral part of the c

R305MR10 – 1R305MRService Manual CHAPTER 10. PRECAUTIONS FOR USING LEAD-FREE SOLDEREmploying lead-free solderThe “Main PWB” of this model employs lead

R305MR11 – 1R305MRService Manual CHAPTER 11. COMPONENT REPLACEMENT AND ADJUSTMENT PROCE-DURE[1] WARNINGSPlease refer to “OVEN PARTS, CABINET PARTS, CO

R305MR11 – 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

R305MR11 – 32. REINSTALLATION1. Reinstall the magnetron to waveguide flange with the four (4)screws. 2. Reinstall the air duct to the oven cavity top

R305MR11 – 4 Figure C-2a Graphic Sheet and Membrane Switch Replacement Figure C-2b Ribbon Cable of Membrane S

R305MR11 – 53. Apply the screw lock tight into the hole (for shaft) of the fan blade.4. Install the fan blade to the shaft of fan motor by pushing the

R305MR11 – 62. REINSTALL1. Reinstall each switch in its place. The secondary interlock/monitorswitches are in the lower position and the door sensing

R305MRiR305MRService Manual PRECAUTIONS TO BE OBSERVED BEFORE AND DURING SERVICING TO AVOIDPOSSIBLE EXPOSURE TO EXCESSIVE MICROWAVE ENERGYBEFORE SERVI

R305MR11 – 717.Now, door screen is free.18.Remove the door decoration from the door frame by straighteningall tabs of the door decoration.19.Now, the

R305MR12 – 1R305MRService Manual CHAPTER 12. CIRCUIT DIAGRAMS[1] Pictorial Diagram (Figure S-1)Figure S-1. Pictorial DiagramHIGH VOLTAGECAPACITORH.V.

R305MR12 – 2[2] Control Unit Circuit (Figure S-2)Figure S-2. Control Unit Circuit $4;1/+(5./&7&2/44;&&3&6&am

R305MR12 – 3[3] Printed Wiring Board of Power Unit (Figure S-3)Figure S-3. Printed Wiring Board of Power Unit

PARTS LISTThis document has been published to be usedfor after sales service only.The contents are subject to change without notice.R305MRMICROWAVE OV

R305MR 2[1] OVEN PARTS7-104-127-14-14-54-44-136-47-34-34-94-122-17-11-131-21-77-31-101-94-107-107-107-84-117-54-174-187-47-101-51-44-21-11-11-117-77-1

R305MR3NO. PARTS CODEPRICE RANKNEW MARKPART RANKDESCRIPTION[1] OVEN PARTSELECTRIC PARTS1-1 QSW-MA085WRE0 AF Secondary interlock switch / door sensing

R305MR 4[2] DOOR AND CONTROL PANEL PARTS3-26-73-43-63-73-2-13-2-43-2-23-2-53-33-13-53-2-63-2-76-65-15-33-2-35-25-45-95-55-75-65-85-85-85-8

R305MR5NO. PARTS CODEPRICE RANKNEW MARKPART RANKDESCRIPTION[2] DOOR AND CONTROL PANEL PARTSCONTROL PANEL PARTS3-1 DPWB-A486DRKZ BH Control unit3-2 DPN

R305MR6INDEXPARTS CODE No.PRICE RANKNEW MARKPART RANK[ D ]DPNLCC024WRKZ 2-3-2 BFDPWB-A486DRKZ 2-3-1 BH[ F ]FACCDA098WREZ 1-1-3 --FACCDA099WREZ 1-1-3

R305MR1 – 1R305MRService Manual CHAPTER 1. WARNING TO SERVICE PERSONNELMicrowave ovens contain circuitry capable of producing very high voltage and cu

EndPageCOPYRIGHT © 2007 BY SHARP CORPORATIONALL RIGHTS RESERVED.No part of this publication may be reproduced, storedin retrieval systems, or transmit

R305MR2 – 1R305MRService Manual CHAPTER 2. MICROWAVE MEASUREMENT PROCEDURE[1] Requirements:1. Microwave leakage limit (Power density limit): The power

R305MR3 – 1R305MRService Manual CHAPTER 3. FOREWORD AND WARNING[1] FOREWORDThis Manual has been prepared to provide Sharp Electronics Corp. Service Pe

R305MR4 – 1R305MRService Manual CHAPTER 4. PRODUCT DESCRIPTION[1] SPECIFICATIONSITEM DESCRIPTIONPower Requirements120 Volts 60 HertzSingle phase, 3 wi

R305MR5 – 1R305MRService Manual CHAPTER 5. GENERAL INFORMATION[1] GROUNDING INSTRUCTIONSThis oven is equipped with a three prong grounding plug. It mu

R305MR5 – 22. TOUCH CONTROL PANELNOTE: Some one-touch cooking features such as “MINUTE PLUS” are disabled after three minutes when the oven is not in