Sharp R-430DK Service Manual

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[Page 1] Sharp R-430DK

R-430DK R-430DW R-430DQ R-440DK R-440DW 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 con- tain circuitry...

[Page 2] Sharp R-430DK

R-430DK R-430DW R-430DQ R-440DK R-440DW 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. (b) Make the following saf...

[Page 3] Sharp R-430DK

1 R-430DK R-430DW R-430DQ R-440DK R-440DW WARNING TO SERVICE PERSONNEL Microwave ovens contain circuitry capable of pro- ducing very high voltage and current, contact with following parts may result in a severe, possibly fatal, electrical shock. (E...

[Page 4] Sharp R-430DK

2 R-430DK R-430DW R-430DQ R-440DK R-440DW 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...

[Page 5] Sharp R-430DK

3 R-430DK R-430DW R-430DQ R-440DK R-440DW SHARP ELECTRONICS CORPORATION SHARP PLAZA, MAHWAH, NEW JERSEY 07430-2135 SERVICE MANUAL MICROWAVE OVEN R-430DK/DW/DQ R-440DK/DW FOREWORD This Manual has been prepared to provide Sharp Electronics Corp. Servic...

[Page 6] Sharp R-430DK

4 R-430DK R-430DW R-430DQ R-440DK R-440DW ITEM DESCRIPTION Power Requirements 120 Volts / 13.8 Amperes/1650Watts 60 Hertz Single phase, 3 wire grounded Power Output 1200 watts (IEC-705 TEST PROCEDURE) Operating frequency of 2450MHz Case Dimensions Wi...

[Page 7] Sharp R-430DK

5 R-430DK R-430DW R-430DQ R-440DK R-440DW adapter properly grounded and polarized. If the extension cord must be used, it should be a 3-wire, 15 amp. or higher rated cord. Do not drape over a countertop or table where it can be pulled on by children ...

[Page 8] Sharp R-430DK

6 R-430DK R-430DW R-430DQ R-440DK R-440DW OPERATION DESCRIPTION OF OPERATING SEQUENCE The following is a description of component functions during oven operation. OFF CONDITION Closing the door activates the door sensing switch and secondary interloc...

[Page 9] Sharp R-430DK

7 R-430DK R-430DW R-430DQ R-440DK R-440DW SENSOR COOKING CONDITION Using the SENSOR function, food is cooked without figuring time, power level or quantity. When the oven senses enough steam from the food, it relays the information to its micropro...

[Page 10] Sharp R-430DK

8 R-430DK R-430DW R-430DQ R-440DK R-440DW Figure O-2 Oven Schematic - Cooking Condition Figure O-1 Oven Schematic - Off Condition SCHEMATIC NOTE: CONDITION OF OVEN 1. DOOR CLOSED 2. CLOCK APPEARS ON DISPLAY 120V AC 60 Hz OVEN LAMP TURN- TABLE MOT...

[Page 11] Sharp R-430DK

9 R-430DK R-430DW R-430DQ R-440DK R-440DW DESCRIPTION AND FUNCTION OF COMPONENTS DOOR OPEN MECHANISM The door is opened by pushing the open button on the control panel, refer to the Figure D-1. When the open button is pushed, the open button pushes u...

[Page 12] Sharp R-430DK

10 R-430DK R-430DW R-430DQ R-440DK R-440DW 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 Seque...

[Page 13] Sharp R-430DK

11 R-430DK R-430DW R-430DQ R-440DK R-440DW A MAGNETRON ASSEMBLY 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. Home fuse or circuit breaker blows when pow...

[Page 14] Sharp R-430DK

12 R-430DK R-430DW R-430DQ R-440DK R-440DW B POWER TRANSFORMER 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 primary input terminals an...

[Page 15] Sharp R-430DK

13 R-430DK R-430DW R-430DQ R-440DK R-440DW 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. If the capacitor i...

[Page 16] Sharp R-430DK

14 R-430DK R-430DW R-430DQ R-440DK R-440DW 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. Before performing ...

[Page 17] Sharp R-430DK

15 R-430DK R-430DW R-430DQ R-440DK R-440DW H BLOWN MONITOR FUSE 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 capaci...

[Page 18] Sharp R-430DK

16 R-430DK R-430DW R-430DQ R-440DK R-440DW 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 th...

[Page 19] Sharp R-430DK

17 R-430DK R-430DW R-430DQ R-440DK R-440DW Popcorn COMPU DEFROST Custom Help Stop Clear Baked Potatoes 5 4 3 21 09876 Power Level Minute Plus Frozen Snacks Ground Meat Start Touch On G 8 G 9 G10 G11 G12 G13 G14 G 7 G 6 G 5 G 4 G 3 G 2 G 1 Beverage C...

[Page 20] Sharp R-430DK

18 R-430DK R-430DW R-430DQ R-440DK R-440DW 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. STEPS...

[Page 21] Sharp R-430DK

19 R-430DK R-430DW R-430DQ R-440DK R-440DW TEST PROCEDURES PROCEDURE LETTER COMPONENT 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...

[Page 22] Sharp R-430DK

20 R-430DK R-430DW R-430DQ R-440DK R-440DW 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 ...

[Page 23] Sharp R-430DK

21 R-430DK R-430DW R-430DQ R-440DK R-440DW TOUCH CONTROL PANEL ASSEMBLY OUTLINE OF TOUCH CONTROL PANEL FOR R-430DK/DW/DQ The touch control section consists of the following units. (1) Key Unit (2) Control Unit (The Control Unit consists of Power Unit...

[Page 24] Sharp R-430DK

22 R-430DK R-430DW R-430DQ R-440DK R-440DW 12 RESET IN Auto clear terminal. Signal is input to reset the LSI to the initial state when power is applied. Temporarily set "L" level the moment power is applied, at this time the LSI is reset. T...

[Page 25] Sharp R-430DK

23 R-430DK R-430DW R-430DQ R-440DK R-440DW 27 AVSS IN Connected to VC. 28-31 ANI0-ANI3 IN Terminal to change cooking input according to the Model. By using the A/D converter contained in the LSI, DC voltage in accordance with the Model in operation i...

[Page 26] Sharp R-430DK

24 R-430DK R-430DW R-430DQ R-440DK R-440DW Pin No. Signal I/O Description 51-54 COM0-COM3 OUT Terminal not used. 55 BIAS IN Terminal not used. 56 VLC0 IN Terminal not used. 57-58 VLC1-VLC2 IN Terminal not used. 59 VSS0 IN Power source voltage: -5.0V....

[Page 27] Sharp R-430DK

25 R-430DK R-430DW R-430DQ R-440DK R-440DW ABSOLUTE HUMIDITY SENSOR CIRCUIT R-430DK/DW/DQ (1) Structure of Absolute Humidity Sensor The absolute humidity sensor includes two thermistors as shown in the illustration. One thermistor is housed in the c...

[Page 28] Sharp R-430DK

26 R-430DK R-430DW R-430DQ R-440DK R-440DW This circuit generates a signal which resets the LSI (IC1) to the initial state when power is supplied. 7) Indicator Circuit This circuit consists of 100 x 160 dots using a Liquid Crystal Display. The Liquid...

[Page 29] Sharp R-430DK

27 R-430DK R-430DW R-430DQ R-440DK R-440DW 1 TIOCA2 OUT Terminal not used. 2 A20 OUT Terminal not used. 3 Vcc IN Power source voltage : +5.0V. The power source voltage to drive LSI is input to Vcc terminal. Connected to Vcc. 4 TMO0 OUT Signal to soun...

[Page 30] Sharp R-430DK

28 R-430DK R-430DW R-430DQ R-440DK R-440DW 25 P44 OUT Key strobe signal. Signal applied to touch screen section. A pulse signal is input to PB1-PB5 terminal while one of G10 line keys on key matrix is touched. 26 P45 OUT Oven lamp, fan motor and turn...

[Page 31] Sharp R-430DK

29 R-430DK R-430DW R-430DQ R-440DK R-440DW 73 HWR OUT Write strobe signal is output to WR terminal of IC5. 74 LWR OUT Terminal not used. 75-76 MD0-MD1 IN Connected to VCC. 77 MD2 IN Connected to GND. 78 Avcc IN A/D converter power source voltage : +5...

[Page 32] Sharp R-430DK

30 R-430DK R-430DW R-430DQ R-440DK R-440DW ABSOLUTE HUMIDITY SENSOR CIRCUIT (R-440DK/DW) (1) Structure of Absolute Humidity Sensor The absolute humidity sensor includes two thermistors as shown in the illustration. One thermistor is housed in the clo...

[Page 33] Sharp R-430DK

31 R-430DK R-430DW R-430DQ R-440DK R-440DW 1. Precautions for Handling Electronic Components This unit uses CMOS LSI in the integral part of the circuits. When handling these parts, the following precautions should be strictly followed. CMOS LSI have...

[Page 34] Sharp R-430DK

32 R-430DK R-430DW R-430DQ R-440DK R-440DW 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 T20...

[Page 35] Sharp R-430DK

33 R-430DK R-430DW R-430DQ R-440DK R-440DW POWER TRANSFORMER REMOVAL Re-install 1. Rest transformer on the bottom plate with its primary terminals toward the oven face plate. 2. Secure transformer with four screws to bottom plate. 3. Re-connect wire ...

[Page 36] Sharp R-430DK

34 R-430DK R-430DW R-430DQ R-440DK R-440DW CONTROL PANEL ASSEMBLY REMOVAL (R-430DK/DW/DQ) POSITIVE LOCK ® CONNECTOR (NO-CASE TYPE) REMOVAL Figure C-2. Positive lock ® connector 1. Disconnect the power supply cord, and then remove outer case. 2....

[Page 37] Sharp R-430DK

35 R-430DK R-430DW R-430DQ R-440DK R-440DW COOLING FAN MOTOR REMOVAL REMOVAL 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 wire leads from th...

[Page 38] Sharp R-430DK

36 R-430DK R-430DW R-430DQ R-440DK R-440DW 3. Secure latch hook (with two (2) mounting screws) to oven flange. 4. Make sure that the monitor switch is operating properly and check continuity of the monitor circuit. Refer to chapter "Test Proce...

[Page 39] Sharp R-430DK

37 R-430DK R-430DW R-430DQ R-440DK R-440DW 6. Re-install choke cover to door panel by pushing. Note: After any service to the door; (A) Make sure that door sensing switch and secondary interlock switch are operating properly. (Refer to chapter “Te...

[Page 40] Sharp R-430DK

38 R-430DK R-430DW R-430DQ R-440DK R-440DW 6 45 1 2 3 6 45 1 2 3 A B C D E F G H A B C D E F G H Figure S-1. Pictorial Diagram R-430DK/DW/DQ HIGH VOLTAGE CAPACITOR HIGH VOLTAGE WIRE A H.V. RECTIFIER POWER SUPPLY CORD 120V 60Hz HIGH VOLTAGE COMPONEN...

[Page 41] Sharp R-430DK

39 R-430DK R-430DW R-430DQ R-440DK R-440DW 6 45 1 2 3 6 45 1 2 3 A B C D E F G H A B C D E F G H HIGH VOLTAGE CAPACITOR HIGH VOLTAGE WIRE A H.V. RECTIFIER POWER SUPPLY CORD 120V 60Hz HIGH VOLTAGE COMPONENTS OVEN LAMP AND SOCKET MAGNETRON COM. MONI...

[Page 42] Sharp R-430DK

40 R-430DK R-430DW R-430DQ R-440DK R-440DW 6 45 1 2 3 6 45 1 2 3 A B C D E F G H A B C D E F G H Figure S-2(b). Power Unit Circuit for R-440DK/DW + – + – + – A 1 CN-A R4 27 D5 T1 1 3 4 D1 D3 D2 D4 6 ab c d VRS1 (J1) D7D8 1SS270A1SS270A 10G471K ...

[Page 43] Sharp R-430DK

41 R-430DK R-430DW R-430DQ R-440DK R-440DW 6 45 1 2 3 6 45 1 2 3 A B C D E F G H A B C D E F G H Figure S-3(a). CPU Unit Circuit R-430DK/DW/DQ C-4 C-2 C-3 C-1 C-5 C-8 C-12 C-11 F-1 F-2 F-3 G 9 G10G11G12 G13 G14 G 8 G 7 G 6 G 5 G 4 G 3 G 2 G 1 + – C...

[Page 44] Sharp R-430DK

42 R-430DK R-430DW R-430DQ R-440DK R-440DW 6 45 1 2 3 6 45 1 2 3 A B C D E F G H A B C D E F G H 46 GND1 VLCD1 COM99 COM98 COM51 COM100 SEG160 SEG159 SEG158 SEG3 SEG2 SEG1 COM50 COM49 COM3 COM2 COM1 VCC1 V50 18 27 41 42 43 44 45 1 2 3 4 26 25 24 23 2...

[Page 45] Sharp R-430DK

43 R-430DK R-430DW R-430DQ R-440DK R-440DW 6 45 1 2 3 6 45 1 2 3 A B C D E F G H A B C D E F G H Figure s-4. Indicator circuit for R-430DK/DW/DQ VC GND IC1 P83 OSC4 VC1 VC2 VC3 VC4 VC5 CF CE CD CC CB CA COM8 COM9 COM10 COM11 COM12 COM13 COM14 COM15 C...

[Page 46] Sharp R-430DK

44 R-430DK R-430DW R-430DQ R-440DK R-440DW 6 45 1 2 3 6 45 1 2 3 A B C D E F G H A B C D E F G H Figure S-5(b) . Printed Wiring Board of Power Unit R-440DK/DW R3 CN - C Q1 SH-A (GREEN) E B R2 D20 RY3 XA VH QKITPB031MREO (J1) VRS1 CN - A R1 ZD1 C2 C1...

[Page 47] Sharp R-430DK

45 R-430DK R-430DW R-430DQ R-440DK R-440DW REF. NO. PART NO. § DESCRIPTION Q'TY CODE PARTS LIST Note: The parts marked “∆” may cause undue microwave exposure. The parts marked “*” are used in voltage more than 250V. "§" MA...

[Page 48] Sharp R-430DK

46 R-430DK R-430DW R-430DQ R-440DK R-440DW REF. NO. PART NO. § DESCRIPTION Q'TY CODE ∆ ∆ ∆ ∆ ∆ ∆ ∆ 3- 2- 2 JBTN-B094MRF0 M Open button [R-430DK & R-440DK] 1 AE 3- 2- 2 JBTN-B095MRF0 M Open butto...

[Page 49] Sharp R-430DK

47 R-430DK R-430DW R-430DQ R-440DK R-440DW 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 authoriz...

[Page 50] Sharp R-430DK

48 R-430DK R-430DW R-430DQ R-440DK R-440DW 6 45 1 2 3 6 45 1 2 3 A B C D E F G H A B C D E F G H OVEN AND CABINET PARTS 2-3 4-7 6-7 1-5 4-6 4-8 4-11 7-2 7-10 1-15 4-9 6-10 6-5 6-4 2-1 7-10 1-12 4-10 7-2 7-2 7-5 4-3 1-13 7-3 7-6 1-10 7-6 1-9 7-8 7-8 4...

[Page 51] Sharp R-430DK

49 R-430DK R-430DW R-430DQ R-440DK R-440DW 6 45 1 2 3 6 45 1 2 3 A B C D E F G H A B C D E F G H CONTROL PANEL PARTS Actual wire harness may be different from illustration. 6-3 6-2 6-1 DOOR PARTS MISCELLANEOUS 5-1 5-1-2 5-1-1 5-3 5-4 5-5 5-2 3 - 2 ...

[Page 52] Sharp R-430DK

50 R-430DK R-430DW R-430DQ R-440DK R-440DW PACKING AND ACCESSORIES Non-replaceable items. DOOR PROTECTION SHEET PLASTIC BAG PACKING CASE TOP PAD ASSEMBLY INTO THE OVEN CAVITY 6-5 TURNTABLE TRAY 6-4 TURNTABLE SUPPORT 6-8 OPERATION MANUAL TRAY PACK ...

[Page 53] Sharp R-430DK

51 R-430DK R-430DW R-430DQ R-440DK R-440DW Notes: ...

[Page 54] Sharp R-430DK

52 R-430DK R-430DW R-430DQ R-440DK R-440DW '00 SHARP CORP. (8M3.20E) Printed in U.S.A COPYRIGHT © 2000 BY SHARP CORPORATION ALL RIGHTS RESERVED. No part of this publication may be repro- duced, stored in retrieval systems, or trans- mitted in a...