Service manual

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R-1512

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 capable of producing very high voltage and

current. Contact with the following parts may result in a

severe, possibly fatal, electrical shock. (High Voltage Capaci-

tor, High Voltage Power Transformer, Magnetron, High Volt-

age Rectifier Assembly, High Voltage Harness etc..)

TABLE OF CONTENTS

Page

PRECAUTIONS TO BE OBSERVED BEFORE AND DURING SERVICING TO

AVOID POSSIBLE EXPOSURE TO EXCESSIVE MICROWAVE ENERGY ................... INSIDE FRONT COVER

BEFORE SERVICING ...................................................................................................... INSIDE FRONT COVER

WARNING TO SERVICE PERSONNEL ................................................................................................................ 1

MICROWAVE MEASUREMENT PROCEDURE ................................................................................................... 2

FOREWORD AND WARNING ............................................................................................................................... 3

PRODUCT SPECIFICATIONS ..............................................................................................................................4

CONTROL PANEL ................................................................................................................................................. 5

OPERATION .......................................................................................................................................................... 5

TROUBLESHOOTING GUIDE .............................................................................................................................. 7

TEST PROCEDURE ..............................................................................................................................................8

TOUCH CONTROL PANEL ASSEMBLY ............................................................................................................ 14

COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE ................................................................ 19

PICTORIAL DIAGRAM ........................................................................................................................................ 22

POWER UNIT CIRCUIT ...................................................................................................................................... 23

LSI UNIT CIRCUIT ............................................................................................................................................... 24

PRINTED WIRING BOARD ................................................................................................................................. 25

PARTS LIST ........................................................................................................................................................ 26

PACKING AND ACCESSORIES ......................................................................................................................... 28

S73M213R1512E

R-1512

OVER THE RANGE

MICROWAVE OVEN

MODEL

SERVICE MANUAL

SHARP CORPORATION

This document has been published to be used for after

sales service only.

The contents are subject to change without notice.

This is a supplemental Service Manual for Model R-1512. This model is quite similar to base model R-1500 and R-1501.

Use this supplemental manual together with the Base Models Service Manual (Reference No. is S8123R1500X//)

for complete operation, service information, etc..

Stop

Clear

Light

Fan

Start

Minute Plus

SENSOR

Summary of content (32 pages)

PAGE 1
R-1512 SERVICE MANUAL S73M213R1512E OVER THE RANGE MICROWAVE OVEN MODEL SENSOR R-1512 Light Fan Stop Clear 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 the following parts may result in a severe, possibly fatal, electrical shock.
PAGE 2
R-1512 R-1511 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.
PAGE 3
R-1512 R-1511 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.
PAGE 4
R-1512 R-1511 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.
PAGE 5
R-1512 R-1511 SERVICE MANUAL OVER THE RANGE MICROWAVE OVEN R-1512 FOREWORD This Manual has been prepared to provide Sharp Electronics Corp. Service Personnel with Operation and Service Information for the SHARP OVER THE RANGE MICROWAVE OVEN, R-1512. The model R-1512 is quite similar to base model R-1500 and R-1501 (Reference No. is S8123R1500X//).
PAGE 6
R-1512 R-1511 PRODUCT SPECIFICATION ITEM DESCRIPTION Power Requirements 120 Volts / 14 Amperes 60 Hertz Single phase, 3 wire grounded Power Output 1.5 Cubic Feet 1000 watts (IEC TEST PROCEDURE) Operating frequency of 2450MHz Width 29-15/16" Height 15- 9/16" Depth 16- 1/4" Width 17-1/2" Height 9-7/8" Depth 14-15/16" Hood lamp Hood fan 2 bulbs, 20W x 2, Incandescent light bulbs Approx. 300 C.F.M. Control Complement Touch Control System Clock ( 1:00 - 12:59 ) Timer (0 - 99 min.
PAGE 7
R-1512 R-1511 CONTROL PANEL 1 0 0 0 WATTS COOK SENSOR LBS KG DEF HELP KEEP WARM PLUS HOT WATER CUSTOM HELP INSTANT SENSOR REHEAT POPCORN BAKED POTATOES FRESH VEGETABLES LIGHT HI/ LO SENSOR COOK CENTER 1 GROUND MEAT 2 RICE 3 FISH/SEAFOOD FAN HI/ LO 4 FROZEN ENTREES 5 CHICKEN BREAST 6 FROZEN VEGETABLES STOP CLEAR REHEAT FRESH ROLLS/ MUFFINS BEVERAGE FROZEN ROLLS/ MUFFINS START MINUTE PLUS DEFROST CENTER 1 GROUND MEAT 2 STEAKS/CHOPS NOTE: Some one-touch cooking features such as "MINUTE PL
PAGE 8
R-1512 R-1511 SENSOR COOKING CONDITION 3. Sensor detects moisture and humidity and calculates cooking time and variable power. Using the Sensor Cooking function, the foods are cooked or defrosted without figuring time, power level or quantity. When the oven senses 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.
PAGE 9
R-1512 R-1511 CAVITY THERMAL CUT-OUT SCHEMATIC NOTE: CONDITION OF OVEN 1. DOOR CLOSED. 2. COOKING TIME PROGRAMMED. 3. VARIABLE COOKING CONTROL "HIGH". 4. "START" BUTTON PRESSED. MAGNETRON TEMPERATURE FUSE CONTROL UNIT N.O. COM. E2 FUSE 20A RY4 Low HOOD MOTOR A1 A3 F2 RY1 RY5 F3 B1 HOOD LAMP HL F1 SECONDARY INTERLOCK RELAY OVEN LAMP RELAY HL B3 N.O. HIGH VOLTAGE CAPACITOR 0.94∝F/ AC2300V COM. OL TTM FM MAGNETRON N.C. HOOD CAPACITOR 120 V AC.
PAGE 10
Q CK POSSIBLE CAUSE AND DEFECTIVE PARTS CONDITION SENSOR COOKING CONDITION PROBLEM SHORTED OR OPENED WIRING L AH SENSOR TEST PROCEDURE CONTROL UNIT R-1512 R-1511 The oven stops and "ERROR" is displayed or does not end during Sensor Cooking condition. (Oven does not shut off after a cup of water is boiling by Sensor Cooking.) Oven stops at 32 seconds after starting. NOTE: For additional troubleshooting procedures, please refer back to the R-1500/1501/R1505/1506 base model Service Manual.
PAGE 11
R-1512 R-1511 TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST 3) To discharge high voltage capacitor, wait for 60 seconds. 4) Replace the key unit. 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. 2. Control Unit. The following symptoms indicate a defective control unit.
PAGE 12
R-1512 R-1511 TEST PROCEDURES PROCEDURE LETTER N G8 G7 G6 G5 G4 G9 HOT WATER FRESH ROLLS / MUFFINS 2 DEFROST CENTER CUSTOM HELP G12 G11 G10 COMPONENT TEST KEEP WARM PLUS REHEAT 4 SENSOR COOK CENTER POPCORN BAKED POTATOES 7 1 POWER LEVEL BEVERAGE G3 G2 G1 3 LIGHT HI / LO 5 6 FAN HI / LO FRESH VEGETABLES 8 9 STOP CLEAR FROZEN ROLLS / MUFFINS 0 TIMER CLOCK START MINUTE PLUS RELAY TEST 1. Disconnect the power supply cord, and then remove outer case.
PAGE 13
R-1512 R-1511 TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST (8) The oven will operate as follows. Menu Steaks/Chops 0.5lbs 1ST STAGE LEVEL TIME 60% 57sec. 2ND STAGE LEVEL TIME 40% 17sec. (9) If improper operation is indicated, the control unit is probably defective and should be checked. P 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.
PAGE 14
R-1512 R-1511 TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST 9) 10) 11) 12) 13) 14) 15) 16) Q Disconnect the power supply cord. Open the door and block it open. To discharge high voltage capacitor, wait for 60 seconds. Reconnect all leads removed from components during testing. Re-install the hood intake duct R. Re-install the outer case (cabinet). Reconnect the power supply cord after the outer case is installed. Run the oven and check all functions.
PAGE 15
R-1512 R-1511 TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST (7) Re-install the outer case (cabinet). (8) Reconnect the power supply cord after the outer case is installed. (9) Reconnect the oven to the power supply and check the sensor cook operation as follows: 9-1. Fill approximately 200 milliliters (7.2 oz) of tap water in a 1000 milliliter measuring cup. 9-2. Place the container on the center of tray in the oven cavity. 9-3. Close the door. 9-4.
PAGE 16
R-1512 R-1511 TOUCH CONTROL PANEL ASSEMBLY OUTLINE OF TOUCH CONTROL PANEL The touch control section consists of the following units as shown in the touch control panel circuit. 3) Synchronizing Signal Circuit The power source synchronizing signal is available in order to compose a basic standard time in the clock circuit. It incorporates a very small error because it works on commercial frequency.
PAGE 17
R-1512 R-1511 Pin No. Signal I/O 10 AN0 IN 11-13 14 P57-P55 CNTR0 OUT OUT Description Used for initial balancing of the bridge circuit (absolute humidity sensor). This input is an analog input terminal from the AH sensor circuit, and connected to the A/D converter built into the LSI. Used for initial balancing of the bridge circuit (absolute humidity sensor). 0.1 sec. Signal to sound buzzer (2.0 kHz). H : GND A A: key touch sound. L : -5V 2.0 sec. B: Completion sound.
PAGE 18
R-1512 R-1511 Pin No. Signal I/O 34 P26 OUT 35 P25 OUT 36 P24 OUT 37 P23 OUT 38 P22 OUT 39 P21 OUT 40 P20 OUT 41 P17 OUT 42 P16 OUT 43 P15 OUT 44 P14 OUT 45-47 48-72 P13-P11 SEG24-SEG0 OUT OUT 73/74 75 76 VCC/VREF AVSS COM3 IN IN OUT Description Key strobe signal. Signal applied to touch-key section. A pulse signal is input to P43-P46 terminal while one of G7 line keys on key matrix is touched. Key strobe signal. Signal applied to touch-key section.
PAGE 19
R-1512 R-1511 Pin No. Signal I/O Description 77 78 79 80 COM2 COM1 COM0 VL3 OUT OUT OUT IN Common data signal. Connected to LCD signal COM3. Common data signal. Connected to LCD signal COM2. Common data signal. Connected to LCD signal COM1. Power source voltage input terminal. Standard voltage for LCD. ABSOLUTE HUMIDITY SENSOR CIRCUIT than the detector circuit starts to function and the LSI observes the initial voltage available at its AN1 terminal.
PAGE 20
R-1512 R-1511 SERVICING 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 extremely high impedance at its input and output terminals. For this reason, it is easily influenced by the surrounding high voltage power source, static electricity charge in clothes, etc. and sometimes it is not fully protected by the built-in protection circuit.
PAGE 21
R-1512 R-1511 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.
PAGE 22
R-1512 R-1511 to the oven cavity top plate, the oven cavity front flange and the fan duct. And remove the hood intake duct R. 5. Disconnect the connector CN-F of AH sensor from the control unit. 6. Remove the two (2) screws and one (1) washer holding the AH sensor to the hood duct L. 7. Release the wire lead of AH sensor from the holes of the hood ducts L and R. 8. Now, the AH sensor is free.
PAGE 23
R-1512 R-1511 by turning the socket counterclockwise. 7. Remove the oven lamp from the socket by turning the oven lamp. 8. Now the oven lamp is free. 5. Disconnect only the connector CN-F from the control unit. It is not necessary to disconnect other connectors or wire leads from the control unit. 6. Release the oven lamp socket from the magnteron duct OVEN LAMP SOCKET REMOVAL 8. Screw the oven lamp off from the lamp socket. 9. Now, the oven lamp is free. 10.
PAGE 24
CN-F 1 BLK 2 RED 3 WHT 1 2 3 22 R E D RED ORG BLK WHT WHT COM. N.O. N.O. COM.
PAGE 25
R-1512 R-1511 2 1 4 3 6 5 A A D1-D4 1N4002 + – – Q1 2SB1238 b – c D22 1SS270A D COM HOOD LAMP RY3 B5 A5 RY4 B3 RY5 D26 1SS270A CN-B F HOOD LAMP D23 1SS270A B9 B1 RY6 C100 7∝/230v A3 MOTOR RUN CAPACITOR A1 D40 1SS270A CN-A G C7 VC C3 VA C5 INT C12 OVEN LAMP TURNTABLE MOTOR FAN MOTOR C4 BUZZER C11 MICRO. C10 HOOD MOTOR H/L C9 HOOD MOTOR COM.
PAGE 26
24 C4 C3 C6 C8 C9 C10 C2 C7 DOOR SENSING SWITCH Q22 MICRO. C14 C13 C11 OVEN LAMP TURNTABLE C12 MOTOR FAN MOTOR BUZZER HOOD LAMP VA HOOD LAMP H. MOTOR COM. H. MOTOR H/L VR VC C11 0.1∝/50v R4 82 C10 47∝/16v NOTE : F G I H F-1 CN-F F-2 C12 0.1∝/50v 6 5 F-3 R92 1.8kF IC2 BA4558 4 IC2 8 D90 MA152WA : IF NOT SPECIFIED, 1/16W ± 5% Q22 DTA143EAK Q21 DTA143EAK C20 0.1∝/50v Q30 DTA143EAK Q26 DTA143EAK Q25 DTA143EAK Q24 DTA143EAK Q23 DTA143EAK LD1 LD2 LD3 LD4 R5 4.
PAGE 27
R-1512 R-1511 2 1 4 3 6 5 A A CN-C 14 B D40 D20 D21 1 DIP 2 R2 Q1 2 SP1 RY1 0 RM 5 3 0 B F 0 V 4 9 A 7 2 M SCM CN-E R3 R30 C B ZD1 E R 1 B R1 C2 C C21 B C3 1 C1 D1 D3 D4 D2 1 VRS1 D T1 BFB Q21 E D 5 J1 P S RY2 QKITPB035MRE0 E 3 E 8 D25 D26 D22 F RY4 RY3 9 1 RY6 LOT NO. D24 D23 F C100 RY5 5 1 CN-A G G CN-B H H Figure S-4.
PAGE 28
R-1512 PARTS LIST Note: The parts marked “ ∆ ” may cause undue microwave exposure. The parts marked “*” are used in voltage more than 250V. REF. NO. "§" MARK: PARTS DELIVERY SECTION PART NO.
PAGE 29
R-1512 REF. NO. 3- 2-2 3- 2-3 3- 2-4 3- 3 3- 4 3- 5 PART NO.
PAGE 30
R-1512 REF. NO. 6-14 6-15 PART NO.
PAGE 31
R-1512 2 1 4 3 6 5 OVEN AND CABINET PARTS 6-1-5 6-12 A A 4-10 6-16 7-2 2-1 7-7 7-3 7-6 B 1-17 7-3 7-3 2-5 7-3 7-3 B 4-12 1-12 7-3 4-19 7-7 7-3 1-14 6-14 4-24 C C 7-3 7-3 4-23 4-17 4-16 2-6 7-3 4-18 4-13 4-17 D 6-13 D 7-7 7-3 2-4 2-2 7-3 4-7 6-8 6-10 1-3 7-3 4-16 1-15 E 4-20 4-13 7-1 4-15 6-7 7-5 4-8 6-6 F 4-3 1-9 1-4 7-7 4-9 1-10 1-7 1-11 1-10 2-8 7-8 1-13 F 4-21 4-14 4-22 7-7 1-6 4-25 1-13 7-3 4-2 G E 1-1 1-16 1-5 1-16 7-8 4-5
PAGE 32
R-1512 2 1 4 3 CONTROL PANEL PARTS 6 5 3-5 3-3 3-4 A A 3-1 3-2 3-5 3-5 3-2-1 B B DOOR PARTS 4-1 5 7-3 3-2-3 C C 5-3 3-2-2 5-4 3-2-4 5-5 5-1 D 5-2-3 D 5-5 5-2-3 E E 5-2-1 5-2-2 5-2 6-4 F F 6-5 MISCELLANEOUS 6-1 6-1-1 6-1-4 G G 6-1-5 6-1-2 6-1-6 6-9 6-1-7 6-1-3 H H 6-15 1 2 3 4 5 6 '03 SHARP CORP. (6S2.400E) Printed in U.S.