R-330BK R-330BW SERVICE MANUAL S2806R330BPW/ MICROWAVE OVEN MODELS R-330BK R-330BW In the interest of user-safety the oven should be restored to its original condition and only parts identical to those specified should be used. WARNING TO SERVICE PERSONNEL: Microwave ovens contain circuitry capable of producing very high voltage and current, contact with following parts may result in a severe, possibly fatal, electrical shock.
R-330BK R-330BW PRECAUTIONS TO BE OBSERVED BEFORE AND DURING SERVICING TO AVOID POSSIBLE EXPOSURE TO EXCESSIVE MICROWAVE ENERGY (a) Do not operate or allow the oven to be operated with the door open.
R-330BK R-330BW WARNING TO SERVICE PERSONNEL Microwave ovens contain circuitry capable of producing very high voltage and current, contact with following parts may result in a severe, possibly fatal, electrical shock. (Example) High Voltage Capacitor, High Voltage Power Transformer, Magnetron, High Voltage Rectifier Assembly, High Voltage Harness etc.. Read the Service Manual carefully and follow all instructions. Don't Touch ! Danger High Voltage When the testing is completed, 1.
R-330BK R-330BW 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/cm2 at any point 5cm or more from the external surface of the oven, measured prior to acquisition by a purchaser, and thereafter (through the useful life of the oven), 5 mW/cm2 at any point 5cm or more from the external surface of the oven.
R-330BK R-330BW SERVICE MANUAL PRODUCT DESCRIPTION MICROWAVE OVEN R-330BK / R-330BW GENERAL INFORMATION FOREWORD This Manual has been prepared to provide Sharp Electronics Corp. Service Personnel with Operation and Service Information for the SHARP MICROWAVE OVEN, R-330BK, R-330BW. OPERATION It is recommended that service personnel carefully study the entire text of this manual so that they will be qualified to render satisfactory customer service.
R-330BK R-330BW SPECIFICATION ITEM DESCRIPTION Power Requirements 120 Volts / 14 Amperes 60 Hertz Single phase, 3 wire grounded Power Output 1100 watts (IEC-705 TEST PROCEDURE) Operating frequency of 2450MHz Width 20-1/2" Height 11-7/8" Depth 15-7/8" Width 13-3/4" Height 8-3/8" Depth 14-7/8" Case Dimensions Cooking Cavity Dimensions 1.0 Cubic Feet Control Complement Touch Control System Clock ( 1:00 - 12:59 ) Timer (0 - 99 min.
R-330BK R-330BW A short power-supply cord is provided to reduce risks of becoming entangled in or tripping over a longer cord. Where a two-pronged wall-receptacle is encountered, it is the personal responsibility and obligation of the customer to contact a qualified electrician and have it replaced with a properly grounded three-pronged wall receptacle or have a grounding adapter properly grounded and polarized. If the extension cord must be used, it should be a 3-wire, 15 amp. or higher rated cord.
R-330BK R-330BW OPERATION DESCRIPTION OF OPERATING SEQUENCE relay and is mechanically associated with the door so that it will function in the following sequence. (1) When the door opens from the closed position, the primary interlock relay (RY2) and secondary interlock switch open their contacts. And contacts of the relay (RY1) remains closed. Then the monitor switch contacts close. (2) When the door is closed from the open position, the monitor switch contacts open first.
R-330BK R-330BW enough steam from the food, it relays the information to its microprocessor which will calculate the remaining cooking time and power level needed for best results. When the food is cooked, water vapor is developed. The sensor “senses” the vapor and its resistance increases gradually. When the resistance reaches the value set according to the menu, supplementary cooking is started.
R-330BK R-330BW SCHEMATIC NOTE: CONDITION OF OVEN 1. DOOR CLOSED 2. COOKING TIME PROGRAMMED 3. VARIABLE COOKING CONTROL "HIGH" 4. "START" PAD TOUCHED MONITOR FUSE 20A THERMAL CUT-OUT (OVEN) THERMAL CUT-OUT (MG.) COM. POWER TRANSFORMER N.O. F2 F1 PRIMARY INTERLOCK RELAY AH SENSOR (RY-2) (RY-1) A1 CONTROL UNIT N.O. COM. SH-B GRN 120V AC 60 Hz SH-A DOOR SENSING SWITCH TTM OL CAPACITOR 1.
R-330BK R-330BW the monitor switch closes. 2. If the wire harness or electrical components are shortcircuited, this monitor fuse blows to prevent an electric shock or fire hazard. PRIMARY INTERLOCK RELAY (RY2), RELAY (RY1), SECONDARY INTERLOCK SWITCH AND MONITOR SWITCH FOR PROPER OPERATION. (REFER TO CHAPTER "TEST PROCEDURE"). NOTE: MONITOR FUSE AND MONITOR SWITCH ARE REPLACED AS AN ASSEMBLY.
R-330BK R-330BW CK = Check / RE = Replace Home fuse or circuit breaker blows when power cord is plugged into wall receptacle Monitor fuse blows when power cord is plugged into wall receptacle. OFF CONDITION All letters and indicators do not appear in display when power cord is first plugged into wall outlet. Display does not operate properly when STOP/CLEAR key is touched. (Buzzer should sound and ":" or time of day should appear in display.) Oven lamp does not light when door is opened.
R-330BK R-330BW TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST 4. To test for an open filament, isolate the magnetron from the high voltage circuit. A continuity check across the magnetron filament leads should indicate less than 1 ohm. 5. To test for a shorted magnetron, connect the ohmmeter leads between the magnetron filament leads and chassis ground. This test should indicate an infinite resistance. If there is little or no resistance the magnetron is grounded and must be replaced. 6.
R-330BK R-330BW TEST PROCEDURES PROCEDURE LETTER C COMPONENT TEST HIGH VOLTAGE RECTIFIER TEST 1. 2. 3. 4. Disconnect the power supply cord, and then remove outer case. Open the door and block it open. Discharge high voltage capacitor. Isolate the rectifier from the circuit. Using the highest ohm scale of the meter, read the resistance across the terminals and observe, reverse the leads to the rectifier terminals and observe meter reading.
R-330BK R-330BW TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST 8. Run the oven and check all functions. CAUTION: IF THE THERMAL CUT-OUT INDICATES AN OPEN CIRCUIT AT ROOM TEMPERATURE, REPLACE THERMAL CUT-OUT. F SECONDARY INTERLOCK SWITCH TEST 1. 2. 3. 4. 5. 6. 7. 8. Disconnect the power supply cord, and then remove outer case. Open the door and block it open. Discharge high voltage capacitor. Isolate the switch and connect the ohmmeter to the common (COM.
R-330BK R-330BW TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST 5. 6. 7. 8. continuity of the monitor circuit. Reconnect all leads removed from components during testing. Reinstall the outer case (cabinet). Reconnect the power supply cord after the outer case is installed. RED Run the oven and check all functions. WHT GRY SCREW DRIVER MONITOR SWITCH OHMMETER H BLOWN MONITOR FUSE TEST 1. 2. 3. 4. Disconnect the power supply cord, and then remove outer case. Open the door and block it open.
R-330BK R-330BW TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST 7) Reconnect the power supply cord after the outer case is installed. 8) Run the oven and check all functions. The following symptoms indicate a defective key unit. a) When touching the pads, a certain pad produces no signal at all. b) When touching a number pad, two figures or more are displayed. c) When touching the pads, sometimes a pad produces no signal. If the key unit is defective.
R-330BK R-330BW TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST 5. Reconnect all leads removed from components during testing. 6. Re-install the outer case (cabinet). 7. Reconnect the power supply cord after the outer case is installed. 8. Run the oven and check all functions.
R-330BK R-330BW TEST PROCEDURES PROCEDURE LETTER M COMPONENT TEST FOIL PATTERN ON THE PRINTED WIRING BOARD TEST To protect the electronic circuits, this model is provided with a fine foil pattern added to the primary on the PWB, this foil pattern acts as a fuse. 1. Foil pattern check and repairs. 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) Follow the troubleshooting guide given below for repair.
R-330BK R-330BW TEST PROCEDURES PROCEDURE LETTER N COMPONENT TEST AH SENSOR TEST Checking the initial sensor cooking condition WARNING : The oven should be fully assembled before following procedure. (1) The oven should be plugged in at least two minutes before sensor cooking. (2) Room temperature should not exceed 95˚F (35˚C). (3) The unit should not be installed in any area where heat and steam are generated. The unit should not be installed, for example, next to a conventional surface unit.
R-330BK R-330BW TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST CHECKING CONTROL UNIT (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 sensor connector that is mounted to control panel. (5) Then connect the dummy resistor circuit (see fig.) to the sensor connector of control panel. (6) Disconnect the leads to the primary of the power transformer.
R-330BK R-330BW TOUCH CONTROL PANEL ASSEMBLY OUTLINE OF TOUCH CONTROL PANEL The touch control section consists of the following units. 3) Power Source Circuit This circuit generates voltages necessary in the control unit from the AC line voltage. In addition, the synchronizing signal is available in order to compose a basic standard time in the clock circuit. (1) Key Unit (2) Control Unit (The Control Unit consists of Power Unit and LSI Unit).
R-330BK R-330BW LSI(IZA866DR) The I/O signal of the LSI(IZA866DR) is detailed in the following table. Pin No. Signal I/O Description 1 AN8 IN Signal coming from touch key. When either G12 line on key matrix is touched, a corresponding signal out of P20 - P27 will be input into AN8. When no key is touched, the signal is held at "H" level. 2 AN9 IN Signal similar to AN8. When either G11 line on key matrix is touched, a corresponding signal will be input into AN9.
R-330BK R-330BW Pin No. Signal I/O 22 P30 OUT Description 0.1 sec. Signal to sound buzzer (2.0 kHz). H : GND A A: key touch sound. 2.0 sec. B: Completion sound. L : -5V H : GND B L : -5V 23 P31 OUT Terminal not used. 24 P32 OUT Common data signal: COM5. Connected to LCD signal COM5 (Pin No. 37) 25-29 P33-P37 OUT Segment data signal. Connected to LCD. The relation between signals are as follows: LSI signal (Pin No.) LCD (Pin No.) P33 (25) ..............................
R-330BK R-330BW Pin No. Signal I/O 79 VCC IN Description 80-84 P10-P14 OUT Used for initial balancing of the bridge circuit (absolute humidity sensor). 85-86 P15-P16 OUT Terminal not used. 87 P17 OUT Oven lamp, fan motor and turntable motor driving signal. 16.7 msec. To turn on and off shut off relay (RY1). The square waveform voltage is delivered to the RY1 driving circuit and RY2 control circuit. Power source voltage: GND (0V).
R-330BK R-330BW ABSOLUTE HUMIDITY SENSOR CIRCUIT (1) Structure of Absolute Humidity Sensor The absolute humidity sensor includes two thermistors as shown in the illustration. One thermistor is housed in the closed vessel filled with dry air while another in the open vessel. Each sensor is provided with the protective cover made of metal mesh to be protected from the external airflow.
R-330BK R-330BW TOUCH CONTROL PANEL SERVICING 4) Re-install the outer case (cabinet). 5) Re-connect the power supply cord after the outer case is installed. 6) Run the oven and check all functions. A. On some models, the power supply cord between the touch control panel and the oven itself is so short that the two can’t be separated. For those models, check and repair all the controls (sensor-related ones included) of the touch control panel while keeping it connected to the oven. B.
R-330BK R-330BW COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE WARNING AGAINST HIGH VOLTAGE: Microwave ovens contain circuitry capable of producing very high voltage and current, contact with following parts may result in severe, possibly fatal, electric shock. (Example) High Voltage Capacitor, Power Transformer, Magnetron, High Voltage Rectifier Assembly, High Voltage Harness etc.. WARNING: Avoid possible exposure to microwave energy. Please follow the instructions below before operating the oven. 1.
R-330BK R-330BW CAUTION: 1. DISCONNECT OVEN FROM POWER SUP PLY BEFORE REMOVING OUTER CASE. 2. DISCHARGE THE HIGH VOLTAGE CAPACITOR BEFORE TOUCHING ANY OVEN COMPONENTS OR WIRING. NOTE: When replacing the outer case, the 2 special Torx screws must be reinstalled in the same locations. Special screw Screw Driver (Type: TORX T20 H or GTXH20-100) POWER TRANSFORMER REMOVAL 1. Disconnect the power supply cord and remove outer case. 2. Open the oven door and block it open. 3. Discharge high voltage capacitor.
R-330BK R-330BW MAGNETRON REMOVAL Removal 1. Disconnect the power supply cord and remove outer case. 2. Open the door and block it open. 3. Discharge high voltage capacitor. 4. Disconnect wire leads from magnetron. 5. Remove the one (1) screw holding chassis support to magnetron. 6. Remove the chassis support from oven. 7. Carefully remove the four (4) screws holding magnetron to waveguide flange. 8. Lift up magnetron with care so that magnetron antenna is not hit by any metal object around antenna. 9.
R-330BK R-330BW NOTE: 1. Before attaching a new key unit, wipe off remaining adhesive on the control panel frame surfaces completely with a soft cloth soaked in alcohol. 2. When attaching the key unit to the control panel frame, adjust the upper edge and right edge of the key unit to the correct position of control panel frame. 3. Stick the key unit firmly to the control panel frame by rubbing with soft cloth not to scratch. is glued on the LCD and the printed wiring board only by heated paste.
R-330BK R-330BW Coil Groove joint pliers Shaft Shaft Axis Stator Gap Bracket Stator Rotor Rear View These are the positions that should be pinched with pliers Center of bracket Table Rotor Side View DOOR SENSING SWITCH/SECONDARY INTERLOCK SWITCH AND MONITOR SWITCH REMOVAL Re-install 1. Re-install each switch in its place. The secondary interlock/monitor switches are in the lower position and the door sensing switch is in the upper position. 2. Re-connect wire leads to each switch.
R-330BK R-330BW procedure of item 15 of "REMOVAL". 2. Re-install the latch spring to the latch head. Re-install the latch spring to the door frame. Re-install latch head to door frame. 3. Re-install door panel to door frame by fitting nine (9) tabs of door frame to nine (9) holes of door panel. 4. Hold the door panel to the door frame by sliding the door panel upward. 5. Put sealer film on door panel. Refer to “Sealer Film” about how to handle new one. 6.
R-330BK R-330BW SEALER FILM Installation 1. Put the adhesive tape on the backing film of the sealer film as shown in Fig. C-8. 2. Tear the backing film by pulling the adhesive tape. 3. Put the pasted side of the sealer film on the door panel Sealer film Backing film Adhesive tape Figure C-8.
H 1 2 3 33 RY1 T1 RY1 RY2 4 YLW YLW (N.O.) COM. 5 COM. GRY WHT WHT WHT BLK WHT Figure S-1. Pictorial Diagram TURNTABLE MOTOR FAN MOTOR RED GRY GRY C WHT WHT BLK GRY BLK BLK GRN WHT BLK NOTE: The neutral (WHT) wire must be connected to the neutral (WHT) wire of the power supply cord. POWER SUPPLY CORD 120V 60Hz POWER TRANSFORMER MAGNETRON HIGH VOLTAGE COMPONENTS WHT WHT BLK NOTE: The grounding (GRN) wire of the power supply cord has been grounded by screw.
R-330BK R-330BW 2 1 4 3 6 5 A A R4 27 b – HZ16-1 ZD1 + Q1 + – C4 10µ/35v D2 6 C3 0.1µ/50v a C D4 3 C1 VA C2 GND C3 VC R5 4.7k R1 2.4k d A2 D6 D1 D3 LED B R3 510 1/2w D5 C2 1000µ/35v AC120V 60Hz D1-D4 11ES1 4 C1 0.1µ/50v A1 T1 VRS1 B 1 C10 Q2 2SB1238 C 2SB1238 (J1) R2 680 1/2w D TURNTABLE MOTOR OVEN LAMP FAN MOTOR AC c RY1 C4 INT C9 VR C5 BUZZER SP1 N.O. D7 D R6 3.3k COM + – C6 TURNTABLE MOTOR OVEN LAMP FAN MOTOR C7 MICRO C8 N.C.
C9 C10 C1 C5 C3 DOOR SWITCH MICRO NC NOTE C12 C11 C7 C8 OVEN LAMP TURNTABLE C6 MOTOR FAN MOTOR VR LED VA BUZZER VC D30 Q20 DTA123JKA C21 0.1µ/50v Q23 DTA143EKA LD10 LD9 LD8 LD7 LD6 LD1 LD2 LD3 LD4 LD5 C11 0.1µ/50v C30 C13 R30 4.7k : IF NOT SPECIFIED, 1/10w ± 5% : IF NOT SPECIFIED, 1SS355 : IF NOT SPECIFIED, 0.01µ / 25v D22 C10 47µ/16v Q40 DTA143EKA R15 0.1µ/50v F1 R112 D101 MA152WA 3.57kD 4.7k R90 330 1w F3 AH SENSOR F2 1.
R-330BK R-330BW 2 1 4 3 6 5 A A WH - 1 1 2 B LD1 LD3 LD2 LD4 B LD5 DIP C (CN - C) 1 12 CN - C 1 2 1 2 C5 D D8 R6 4 E 5 6 ZD1 R1 B Q3 SP1 1 D7 VRB D 2 7 8 9 U SH - A R2 D5 D6 SH - B B Q2 E Q1 B R5 R4 3 R3 C WH - 1 C4 D 1 9 E C3 CN - B E E C2 RY2 T1 AC D1 D3 F F S D4 D2 1 VRS1 2 CN - A XA G VH D9 G AC RY1 (CN - D) OMIF D U QKITPB026MRE0 F P 11 C1 10 (D10) OL FM TTM RY3 H H Figure S-4.
R-330BK R-330BW 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.
R-330BK R-330BW PART NO.
R-330BK R-330BW 2 1 4 3 6 5 7-5 OVEN AND CABINET PARTS 2-1 7-8 A A 7-5 4-1 7-8 1-11 B 7-5 B 1-10 4-9 4-17 7-4 7-7 4-20 C 6-7 7-5 1-15 C 1-8 6-6 1-13 4-16 7-2 7-2 4-10 1-4 4-21 4-22 7-2 D D 7-6 6-9 7-3 7-3 4-7 1-5 6-10 4-15 E 4-12 E 1-1 7-5 1-6 1-2 7-1 4-2 4-14 7-5 1-7 F 4-3 1-12 1-1 2-2 4-4 7-3 4-8 4-23 F 1-3 7-5 4-11 4-19 7-6 7-1 4-5 7-1 4-6 1-14 G 6-2 G 4-13 2-3 7-6 1-9 2-4 1-5 7-6 6-1 2-5 7-1 7-6 H 7-6 7-6 H 7-6 7-6 7-6 1 2
R-330BK R-330BW 2 1 4 3 5 6 3-6 CONTROL PANEL PARTS A A 3-6 3-2 3-3 3-4 3-5 B B 3-6 3-1B 3-6 C C DOOR PARTS 3-3-1 D D 4-18 3-1 5-8 3-3-3 5-2 3-3-2 5-7 5-1 E E 5-3 5-4 F F 5-6 5-5 G G MISCELLANEOUS 6-3 (CAPACITOR) 6-4 H H 6-5 Actual wire harness may be different from illustration.
R-330BK R-330BW 2 1 4 3 6 5 PACKING AND ACCESSORIES A A TOP PAD ASSEMBLY FPADBA341WRK0 B DOOR PROTECTION SHEET CABINET COVER (for R-330BK) SPADPA204WRE0 SPAKHA003WRE0 B PLASTIC BAG SSAKHA034WRE0 6- 8 INSTRUCTION BOOK & PRINTING MATTER 6- 2 C TURNTABLE TRAY C BOTTOM PAD ASSEMBLY FPADBA342WRK0 6- 1 TURNTABLE SUPPORT TRAY PACK INTO THE OVEN CAVITY SPADFA397WRE0 D D Not replaceable items.
R-330BK R-330BW COPYRIGHT © 1997 BY SHARP CORPORATION ALL RIGHTS RESERVED. No part of this publication may be reproduced, stored in retrieval systems, or transmitted in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without prior written permission of the publisher. '98 SHARP CORP. (2S2.530E) Printed in U.S.
