Sharp R-320HQ Operation- Manuals

Page 2 - performed on each oven prior to release to the owner.; BEFORE SERVICING; . The owner of the unit should be instructed not to use the unit

40 R - 3 2 0 H KR - 32 0 H QR - 320HW PRECAUTIONS TO BE OBSERVED BEFORE ANDDURING SERVICING TO AVOID POSSIBLEEXPOSURE TO EXCESSIVE MICROWAVEENERGY (a) Do not operate or allow the oven to be operated with the door open.(b) Make the following safety checks on all ovens to be serviced before activating...

Page 3 - WARNING TO SERVICE PERSONNEL; Before Servicing; Disconnect the power supply cord , and then remove; After repairing; Reconnect all leads removed from components during

1 R - 32 0 H KR - 320HQR-320HW WARNING TO SERVICE PERSONNEL Microwave ovens contain circuitry capable of pro-ducing very high voltage and current, contact withfollowing parts may result in a severe, possiblyfatal, electrical shock. (Example) High Voltage Capacitor, High Voltage Power Trans-former, M...

Page 4 - MICROWAVE MEASUREMENT PROCEDURE; should not exceed 1mW/cm

2 R - 3 2 0 H KR - 32 0 H QR - 320HW MICROWAVE MEASUREMENT PROCEDURE A. Requirements: 1) Microwave leakage limit (Power density limit): The power density of microwave radiation emitted by a microwave oven should not exceed 1mW/cm 2 at any point 5cm or more from the external surface of the oven, meas...

Page 5 - SHARP ELECTRONICS CORPORATION; SERVICE MANUAL; MICROWAVE OVEN; DANGER

3 R - 32 0 H KR - 320HQR-320HW SHARP ELECTRONICS CORPORATION SHARP PLAZA, MAHWAH, NEW JERSEY 07430-2135 SERVICE MANUAL MICROWAVE OVEN R-320HK/ R-320HQ/ R-320HW FOREWORD This Manual has been prepared to provide Sharp Electronics Corp.Service Personnel with Operation and Service Information for theSHA...

Page 6 - SPECIFICATION; GROUNDING INSTRUCTIONS

4 R - 3 2 0 H KR - 32 0 H QR - 320HW ITEM DESCRIPTION Power Requirements 120 Volts / 14.2 Amperes60 HertzSingle phase, 3 wire grounded Power Output 1200 watts (IEC TEST PROCEDURE)Operating frequency of 2450MHz Case Dimensions Width 20-1/2"Height 12-1/4"Depth 17-1/4" Cooking Cavity Dimens...

Page 7 - CAUTION: DO NOT UNDER ANY CIRCUMSTANCES CUT OR RE-; OVEN DIAGRAM; Door opening button; The oven will not operate unless the door is securely closed.; Removable turntable; It will light when oven is operating door is open.; TOUCH CONTROL PANEL

5 R - 32 0 H KR - 320HQR-320HW contact a qualified electrician and have it replaced with a properlygrounded three-pronged wall receptacle or have a grounding adapterproperly grounded and polarized. If the extension cord must be used, itshould be a 3-wire, 15 amp. or higher rated cord. Do not drape o...

Page 8 - OPERATION; DESCRIPTION OF OPERATING SEQUENCE; OFF CONDITION

6 R - 3 2 0 H KR - 32 0 H QR - 320HW OPERATION DESCRIPTION OF OPERATING SEQUENCE The following is a description of component functions duringoven operation. OFF CONDITION Closing the door activates the door sensing switch andsecondary interlock switch. (In this condition, the monitorswitch contacts ...

Page 11 - DESCRIPTION AND FUNCTION OF COMPONENTS; DOOR OPEN MECHANISM; As the door goes to a closed position, the monitor switch; NOTE: C / T F U S E A N D M O N I T O R S W I T C H A R E; TURNTABLE MOTOR; If the wire harness or electrical components are short-

9 R - 32 0 H KR - 320HQR-320HW DESCRIPTION AND FUNCTION OF COMPONENTS DOOR OPEN MECHANISM The door is opened by pushing the open button on thecontrol panel, refer to the Figure D-1.When the open button is pushed, the open button pushes upthe switch lever, and then the switch lever pushes up thelatch...

Page 12 - TROUBLESHOOTING GUIDE

10 R - 3 2 0 H KR - 32 0 H QR - 320HW TROUBLESHOOTING GUIDE Never touch any part in the circuit with your hand or an uninsulated tool while the power supply is connected. When troubleshooting the microwave oven, it is helpful to follow the Sequence of Operation in performing the checks. Manyof the p...

Page 13 - PROBLEM; POSSIBLE CAUSE; TEST PROCEDURE

11 R - 32 0 H KR - 320HQR-320HW Home fuse or circuit breaker blowswhen power cord is plugged into wallreceptacle C/T fuse blows when power cord isplugged into wall receptacle. All letters and indicators do not ap-pear in display when power cord isfirst plugged into wall outlet. Display does not oper...

Page 14 - MAGNETRON ASSEMBLY TEST; TEST PROCEDURES; PROCEDURE; the magnetron filament leads should indicate less than 1 ohm.; POWER TRANSFORMER TEST

12 R - 3 2 0 H KR - 32 0 H QR - 320HW A MAGNETRON ASSEMBLY TEST TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST 1. Disconnect the power supply cord, and then remove outer case.2. Open the door and block it open.3. Discharge high voltage capacitor.4. To test for an open filament, isolate the magnetro...

Page 16 - MONITOR SWITCH TEST; turntable and oven light will be activated by RY1.

14 R - 3 2 0 H KR - 32 0 H QR - 320HW 1. Disconnect the power supply cord, and then remove outer case.2. Open the door and block it open.3. Discharge high voltage capacitor.4. Before performing this test, make sure that the secondary interlock switch and the primary interlock relay are operating pro...

Page 17 - The following symptoms indicate a defective key unit.; TOUCH CONTROL PANEL ASSEMBLY TEST

15 R - 32 0 H KR - 320HQR-320HW TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST CAUTION: BEFORE REPLACING A BLOWN C/T FUSE, TEST THE PRIMARY INTERLOCK RELAY, SECONDARY INTERLOCK SWITCH, DOOR SENSING SWITCH AND MONITOR SWITCHFOR PROPER OPERATION. If the C/T fuse is blown by improper switch operation,...

Page 18 - If the Key unit or the Control unit is defective.; KEY UNIT TEST

16 R - 3 2 0 H KR - 32 0 H QR - 320HW TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST 3. If the Key unit or the Control unit is defective. 1) Disconnect the power supply cord, and then remove outer case.2) Open the door and block it open.3) Discharge high voltage capacitor.4) Replace the Control uni...

Page 19 - ) Make a visual inspection of the varistor. Check for burned; FOIL PATTERN ON THE PRINTED WIRING BOARD TEST

17 R - 32 0 H KR - 320HQR-320HW RY1 and RY2 Relay Test These relays are operated by D.C. voltageCheck voltage at the relay coil with a D.C. voltmeter during the microwave cooking operation. DC. voltage indicated .................. Defective relay.DC. voltage not indicated ............ Check diode wh...

Page 20 - STEPS; AH SENSOR TEST

18 R - 3 2 0 H KR - 32 0 H QR - 320HW TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST 1) Disconnect the power supply cord, and then remove outer case.2) Open the door and block it open.3) Discharge high voltage capacitor.4) Disconnect the leads to the primary of the power transformer.5) Ensure that ...

Page 21 - touch the number pads 1 once and the number pad 4 once.

19 R - 32 0 H KR - 320HQR-320HW TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST TESTING METHOD FOR AH SENSOR AND/OR CONTROL UNIT To determine if the sensor is defective, the simplest method is to replace it with a new replacement sensor.(1) Disconnect the power supply cord, and then remove outer cas...

Page 22 - OUTLINE OF TOUCH CONTROL PANEL; The touch control section consists of the following units.; ) Power Source Circuit; A switch to “tell” the LSI if the door is open or closed.; ) Back Light Circuit; Signal

20 R - 3 2 0 H KR - 32 0 H QR - 320HW DESCRIPTION OF LSI LSIThe I/O signal of the LSI is detailed in the following table. TOUCH CONTROL PANEL ASSEMBLY OUTLINE OF TOUCH CONTROL PANEL The touch control section consists of the following units. (1) Key Unit(2) Control Unit (The Control Unit consists of ...

Page 25 - OUT; (1) Structure of Absolute Humidity Sensor; ABSOLUTE HUMIDITY SENSOR CIRCUIT; ) Absolute humidity sensor circuit; ventilation opening for sensing

23 R - 32 0 H KR - 320HQR-320HW Pin No. Signal I/O Description 79 COM0 OUT Common data signal.Connected to LCD signal COM1. 80 VL3 IN Power source voltage input terminal.Standard voltage for LCD. Connected to GND. (1) Structure of Absolute Humidity Sensor The absolute humidity sensor includes two th...

Page 26 - TOUCH CONTROL PANEL SERVICING

24 R - 3 2 0 H KR - 32 0 H QR - 320HW 1. Precautions for Handling Electronic Components This unit uses CMOS LSI in the integral part of thecircuits. When handling these parts, the followingprecautions should be strictly followed. CMOS LSI haveextremely high impedance at its input and outputterminals...

Page 27 - OUTER CASE REMOVAL; WARNING AGAINST HIGH VOLTAGE:

25 R - 32 0 H KR - 320HQR-320HW To remove the outer case, proceed as follows.1. Disconnect the power supply cord.2. Open the oven door and block it open.3. Remove the two (2) screws from the lower portion of the rear cabinet using a T20H Torx type or GTXH20-100screw driver. OUTER CASE REMOVAL Microw...

Page 28 - NOTE: When replacing the outer case, the 2 special; POWER TRANSFORMER REMOVAL

26 R - 3 2 0 H KR - 32 0 H QR - 320HW Removal1. Disconnect the power supply cord and then remove outer case. 2. Open the door and block it open.3. Discharge high voltage capacitor.4. Disconnect all wire leads from magnetron.5. Remove the one (1) screw holding the chassis support to the magnetron. 6....

Page 29 - POSITIVE LOCK; connector; CONTROL PANEL ASSEMBLY REMOVAL

27 R - 32 0 H KR - 320HQR-320HW 1. Disconnect the power supply cord, and then remove outer case. 2. Open the door and block it open.3. Discharge high voltage capacitor.4. Push the lever of positive lock ® connector. 5. Pull down on the positive lock ® connector. CAUTION: WHEN CONNECTING THE POSITIVE...

Page 30 - COOLING FAN MOTOR REMOVAL; Make sure that the axis of the shaft is not slanted.; TURNTABLE MOTOR REMOVAL; Shaft

28 R - 3 2 0 H KR - 32 0 H QR - 320HW Side View Rear View 1. Disconnect the power supply cord.2. Remove turntable and turntable support from oven cavity. 3. Lay the oven on it's backside. Remove the turntable motor cover by snipping off the material in four corners. 4. Where the corners have been sn...

Page 31 - NOTE: When carrying out any repair to the door, do not; DOOR REPLACEMENT

29 R - 32 0 H KR - 320HQR-320HW hook, pushing and pulling upper portion of door towardthe oven face. Then check lower portion of the latchhook, pushing and pulling lower portion of the doortoward the oven face. Both results (play in the door)should be less than 0.5mm. 2. The door sensing switch and ...

Page 32 - SEALER FILM

30 R - 3 2 0 H KR - 32 0 H QR - 320HW Sealer film Backing film Adhesive tape 14.Now, latch head and latch spring are free.15.Remove door screen from door frame.16.Now, door screen is free. REINSTALLATION1. Reinstall door screen to door frame .2. Reinstall the latch spring to the latch head. Reinstal...

Page 33 - HIGH VOLTAGE COMPONENTS

31 R - 32 0 H KR - 320HQR-320HW 6 4 5 1 2 3 6 4 5 1 2 3 A B C D E F G H A B C D E F G H Figure S-1. Pictorial Diagram HIGH VOLTAGE CAPACITOR H.V. RECTIFIER POWER SUPPLY CORD 120V 60Hz HIGH VOLTAGE COMPONENTS MAGNETRON COM. MONITOR SWITCH COM. N.O. N.C. DOOR SENSING SWITCH SECONDARY INTERLOCK SWITCH ...

Page 34 - LIQUID CRYSTAL DISPLAY

32 R - 3 2 0 H KR - 32 0 H QR - 320HW Figure S-2. Control Unit Circuit 6 4 5 1 2 3 6 4 5 1 2 3 A B C D E F G H A B C D E F G H LSI UNIT OVEN LAMP TURNTABLE MOTOR FAN MOTOR POWER TRANSFOMER IF NOT SPECIFIED 1/10W ± 5% G1 3 G1 2 G1 1 G1 0 G9 G8 G7 G5 G4 G3 G2 G1 F-1 F-2 F3 NO NO B-1 COM COM B-2 C1 R3 ...

Page 35 - Figure S-3. Printed Wiring Board of Power Unit

33 R - 32 0 H KR - 320HQR-320HW 6 4 5 1 2 3 6 4 5 1 2 3 A B C D E F G H A B C D E F G H Figure S-3. Printed Wiring Board of Power Unit RY1 RY2 E C B E C B E C B VRS1 L1 D7 D3 P S D4 C2 D1 C1 D2 R8 R7 R2 R4 Q3 Q4 SP1 T1 D6 DZ1 WH-2 WH-2 LED Q2 D5 D8 D30 1 2 J1 J6 J2 J5 R5 C4 C5 CN-B CN-F 1 2 3 C10 D ...

Page 36 - PARTS LIST; DESCRIPTION

34 R - 3 2 0 H KR - 32 0 H QR - 320HW ∆ ∆ ∆ ****** * ∆ * ∆ * ∆ ∆ PARTS LIST Note: The parts marked “ ∆ ” may cause undue microwave exposure. The parts marked “*” are used in voltage more than 250V. REF. NO. PART NO. DESCRIPTION Q'TY CODE ELECTRIC PARTS 1-1 QSW-MA147WRZZ Secondary interlock switch / ...

Page 37 - HOW TO ORDER REPLACEMENT PARTS; MISCELLANEOUS

35 R - 32 0 H KR - 320HQR-320HW HOW TO ORDER REPLACEMENT PARTS To have your order filled promptly and correctly, please furnish the following information. 1. MODEL NUMBER 2. REF. NO. 3. PART NO. 4. DESCRIPTION Order Parts from the authorized SHARP parts Distributor for your area.Defective parts requ...

Page 38 - OVEN AND CABINET PARTS

36 R - 3 2 0 H KR - 32 0 H QR - 320HW 6 4 5 1 2 3 6 4 5 1 2 3 A B C D E F G H A B C D E F G H OVEN AND CABINET PARTS A A 7-10 7-1 4-1 4-5 4-4 4-13 6-5 7-3 4-3 7-8 4-9 2-1 1-7 1-12 7-6 7-3 1-10 1-9 4-10 7-10 7-10 7-8 4-11 7-5 4-17 7-4 7-10 1-5 1-4 4-12 4-12 4-12 4-2 1-1 1-1 1-11 7-7 7-10 7-10 7-7 6-4...

Page 40 - Not replaceable items.

38 R - 3 2 0 H KR - 32 0 H QR - 320HW PACKING AND ACCESSORIES COPYRIGHT © 2003 BY SHARP CORPORATION ALL RIGHTS RESERVED. No part of this publication may be reproduced,stored in retrieval systems, or transmitted in anyform or by any means, electronic, mechanical,photocopying, recording, or otherwise,...