R-9H58 SERVICE MANUAL S8606R9H58PJ/ CONVECTION MICROWAVE OVEN MODEL R-9H58 In interests of user-safety the oven should be restored to its original condition and only parts identical to those specified should be used. TABLE OF CONTENTS Page CAUTION, MICROWAVE RADIATION ............................................................................................................. 1 WARNING .....................................................................................................................
R-9H58
R-9H58 SERVICE MANUAL PRODUCT SPECIFICATIONS CONVECTION MICROWAVE OVEN R-9H58 APPEARANCE VIEW GENERAL IMPORTANT INFORMATION This Manual has been prepared to provide Sharp Corp. Service engineers with Operation and Service Information. It is recommended that service engineers carefully study the entire text of this manual, so they will be qualified to render satisfactory customer service.
R-9H58 PRODUCT SPECIFICATIONS ITEM Power Requirements Power Consumption Power Output Convection heater Case Dimensions Cooking Cavity Dimensions Control Complement Set Weight DESCRIPTION 230 - 240 Volts 50 Hertz Single phase, 3 wire earthed 1500 W (Microwave) 1600 W (Convection) 850 watts (IEC-705-1988 ) Operating frequency of 2450MHz 1500 W Width 627mm Height 378mm Depth 483mm Width 410mm Height 245mm Depth 410mm Touch Control System Clock ( 1:00 - 12:59) Timer (0 - 99 min. 99 sec.
R-9H58 APPEARANCE VIEW 6 13 10 1 1. Ventilation opening 2. Oven lamp 3. Door hinges 4. Door safety latches 5. See through door 6. Door seal and sealing surfaces 7. Door open button 8. Touch control panel 9. Digital readout 10. Wave guide cover 11. Coupling 12. Access cover for oven lamp replacement 13. Menu label 14. Rating label 15. low rack 16. High rack 12 9 3 8 7 11 5 4 15 4 2 14 TOUCH CONTROL PANEL MIX CONV DEFROST SENSOR COOK MULTI COOK PAD Press to select Multi Cook mode.
R-9H58 OPERATION SEQUENCE The following is a description of component functions during oven operation. 5. Upon completion of the cooking time, the power transformer, oven lamp, etc. are turned off and the generation of microwave energy is stopped. The oven will revert to the OFF condition.. 6 When the door is opened during a cook cycle, the monitor switch, upper latch switch, lower latch switch and stop switch are activated with the following results.
R-9H58 unit de-energizing the relay (RY4) and opening the circuit to the damper motor. 3. The coil of heater relay (RY3) is energized by the CPU unit and the main supply voltage is added to the convection heater. 4. When the oven temperature reaches the selected preheat temperature, the following operations occur: 4-1. The heater relay (RY3) is de-energized by the CPU unit temperature circuit and thermistor, opening the circuit to the convection heater. 4-2.
R-9H58 MIC RO 2. The cooking time will appear on the display and start counting down to zero. The cooking time is adjusted automatically according to the weight of the food. 3. The shut-off relays (RY1, RY3, RY5 and RY6) are energized, turning on the oven lamp, turntable motor, cooling fan motor and convection motor. The power supply voltage is added to the convection heater. 4. Now, the oven is in the convection cooking mode. 5.
R-9H58 IMPORTANT: During sensor cooking operation, the fire sensing operation sequence will not begin until the AH sensor has detected vapours and initiated a sensor cooking cycle. This is because the operation of the convection fan would interfere with the AH sensor's vapour detection. 0 23 24 30 32 (sec.) 64 (sec.) 6 sec. CONVECTION MOTOR ON OFF 3 sec. THERMISTOR ON OFF ON Sensing Voltage OFF Sensing the voltage across the temperature measurement circuit.
R-9H58 rounding the magnetron and cools the magnetron. This air is channelled through the oven cavity to remove steam and vapours given off from the heating foods. It is then exhausted through the exhausting air vents at the oven cavity. 2. The fuse also blows when upper latch switch and lower latch switch remain closed with the oven door open and when the monitor switch closes. 3. The fuse M8A also blows when asymmetric rectifier, H.V. rectifier, H.V. wire harness, H.V.
R-9H58 NOISE FILTER It is then exhausted at the top of the oven cavity into a condensation compartment. The noise filter prevents the radio frequency interference that might flow back in the power circuit. Convection Cooking: Damper is in the closed position, so that no hot air will be allowed to leak out the oven cavity. Damper Operation 1. When power supply cord is plugged in: 1-1. When power supply cord is plugged in, a signal is sensed in the control unit, and operates shut-off relay (RY4). 1-2.
R-9H58 SERVICING WARNING TO SERVICE PERSONNEL Microwave ovens contain circuitry capable of producing very high voltage and current, contact with any part of the high voltage circuit will result in electrocution. High voltage capacitor, Power transformer, Magnetron, High voltage rectifier assembly, High voltage harness. REMEMBER TO CHECK 3D REMEMBER TO CHECK 4R 1) Disconnect the supply. 2) Door opened, and wedged open. 3) Discharge high voltage capacitor.
R-9H58 CK = Check / RE = Replace POSSIBLE CAUSE AND DEFECTIVE PARTS CONDITION PROBLEM Home fuse blows when power supply cord is plugged into wall outlet. Fuse M8A blows when power cord is plugged into wall outlet. OFF CONDITION Display does not show anything when power cord is first plugged into wall outlet. Display does not operate properly when STOP/ CLEAR pad is touched. (The time of day should appear on the display with beep sound during normal condition.) Oven lamp does not light with door opened.
R-9H58 TEST PROCEDURES PROCEDURE LETTER A COMPONENT TEST MAGNETRON TEST NEVER TOUCH ANY PART IN THE CIRCUIT WITH YOUR HAND OR AN INSULATED TOOL WHILE THE OVEN IS IN OPERATION. CARRY OUT 3D CHECK. Isolate the magnetron from high voltage circuit by removing all leads connected to filament terminal. To test for an open circuit filament use an ohmmeter to make a continuity test between the magnetron filament terminals, the meter should show a reading of less than 1 ohm.
R-9H58 TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST Initial temperature ............................................................................................. T1 = 11°C Temperature after (49 + 2) = 51 sec. ................................................................ T2 = 21°C Temperature difference Cold-Warm ............................................................... ∆T1 = 10°C Measured output power The equation is “P = 85 x ∆T” ..................................................
R-9H58 TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST rectifier, high voltage wire or filament winding of the power transformer is shorted. CARRY OUT 4R CHECKS. NOTE: FOR MEASUREMENT OF THE RESISTANCE OF THE RECTIFIER, THE BATTERIES OF THE MEASURING INSTRUMENT MUST HAVE A VOLTAGE AT LEAST 6 VOLTS, BECAUSE OTHERWISE AN INFINITE RESISTANCE MIGHT BE SHOWN IN BOTH DIRECTIONS. D HIGH VOLTAGE CAPACITOR TEST CARRY OUT 3D CHECKS. A. Isolate the high voltage capacitor from the circuit. B.
R-9H58 TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST Table: Temperature Fuse and Thermal cut-out Test Temperature of “ON” condition (closed circuit) (˚C) Parts Name Temperature of “OFF” condition (open circuit) (˚C) Indication ofohmmeter (When room temperature is approx. 20˚C) Temp. fuse 150˚C This is not resetable type. Above 150 ˚C Closed circuit Thermal cut-out 150˚C Below 130˚C Above 150˚C Closed circuit. Thermal cut-out 95˚C Below 75˚C Above 95˚C Closed circuit.
R-9H58 TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST If incorrect readings are obtained, replace the motor. CARRY OUT 4R CHECKS. K MONITOR RESISTOR TEST CARRY OUT 3D CHECKS. Disconnect the leads from the monitor resist. Using an ohmmeter and set on a low range. Check between the terminals of the monitor resistor. The resistance of monitor resistor is approx. 0.8 ohms. If incorrect readings are obtained, replace the monitor resistor. CARRY OUT 4R CHECKS. L NOISE FILTER TEST.
R-9H58 TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST 2-3 Other possible troubles caused by defective control unit. a) Buzzer does not sound or continues to sound. b) Clock does not operate properly. c) Cooking is not possible. d) Proper temperature measurement is not obtained.
R-9H58 TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST STEPS OCCURRENCE CAUSE OR CORRECTION 1 The rated voltage is not applied between Pin No. 9 of the 5-pin connector (A) and the common terminal of the relay RY1. Check supply voltage and oven power cord. 2 The rated voltage is applied to primary side of power transformer. Power transformer or secondary circuit defective. Check and repair. 3 Only pattern at "a" is broken. *Insert jumper wire J1 and solder.
R-9H58 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 oven from power supply and remove outer case. (2) Discharge the high voltage capacitor. (3) Remove the AH sensor. (4) Install the new AH sensor. (5) Re-install the outer case. (6) Reconnect the oven to the power supply and check the sensor cook operation, proceed as follows: 6-1.
R-9H58 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. 4) ACL Circuit A circuit to generate a signals which resetting the LSI to the initial state when power is applied. (1) Key Unit (2) Control Unit 5) Buzzer Circuit The buzzer is responds to signals from the LSI to emit noticing sounds (key touch sound and completion sound).
R-9H58 DESCRIPTION OF LSI LSI(IZA736DR): The I/O signals of the LSI(IZA736DR) are detailed in the following table. Pin No. Signal I/O 1 2 VCC VEE IN IN 3 AVSS IN 4 VREF IN 5 AN7 IN 6 AN6 IN 7-9 10 AN5-AN3 AN2 IN IN 11 AN1 IN 12 AN0 IN 13 P55 OUT Description Connected to GND. Anode (segment) of Fluorescent Display light-up voltage: -30V. Vp voltage of power source circuit input. Power source voltage: -5V. VC voltage of power source circuit input.
R-9H58 Pin No. 17 18 Signal P51 P50 I/O OUT OUT Description Magnetron high-voltage circuit driving signal. To turn on and off the cook VARI MODE relay(RY2). In HIGH operation, the HIGH (100% power) signals holds "L" level during microMED HIGH (approx. 70% power) wave cooking and "H" level while not cooking. In other cooking modes MED (approx. 50% power) (MED HIGH, MED, MED LOW, MED LOW (approx. 30% power) LOW) the signal turns to "H" level LOW (approx.
R-9H58 Pin No. Signal I/O Description 35 P25 IN 36 P24 IN Signal similar to P27. When any one of G-3 line key on key matrix is touched, a corresponding signal will be input into P25. Signal similar to P27. When any one of G-4 line key on key matrix is touched, a corresponding signal will be input into P24. 37 P23 OUT 38-40 P22-P20 OUT 41 P17 OUT 42 P16 OUT 43 44 45 46 47 48 49-53 P15 P14 P13 P12 P11 P10 P07-P03 OUT OUT OUT OUT OUT OUT OUT Segment data signals.
R-9H58 Pin No. 54-56 Signal P02-P00 I/O OUT 57-59 P37-P35 OUT 60-64 P34-P30 OUT Description Digit selection signal. Signal similar to P55. Digit selection signal. Signal similar to P55. Used for initial balancing of the bridge circuit (absolute humidity sensor). ABSOLUTE HUMIDITY SENSOR CIRCUIT (1) Structure of Absolute Humidity Sensor The absolute humidity sensor includes two thermistors as shown in the illustration.
R-9H58 SERVICING 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. On some models, the power supply cord between the touch control panel and the oven proper is long enough that they may be separated from each other.
R-9H58 COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE WARNING: Avoid possible exposure to microwave energy. Please follow the instructions below before operating the oven. 1. Disconnect the oven from power supply. 2. Make sure that a definite” click” can be heard when the microwave oven door is unlatched. (Hold the door in a closed position with one hand, then push the door open button with the other, this causes the latch leads to rise, it is then possible to hear a “click’ as the door switches operate.
R-9H58 ASYMMETRIC RECTIFIER AND HIGH VOLTAGE RECTIFIER REMOVAL 1. CARRY OUT 3D CHECKS. 2. Remove one (1) screw holding the high voltage rectifier terminal to the capacitor holder. 3. Disconnect the high voltage rectifier assembly from the capacitor. CAUTION: WHEN REPLACING HIGH VOLTAGE RECTIFIER ASSEMBLY, ENSURE THAT THE EARTHING SIDE TERMINAL MUST BE SECURED FIRMLY WITH AN EARTHING SCREW. HIGH VOLTAGE CAPACITOR REMOVAL 1. CARRY OUT 3D CHECKS. 2.
R-9H58 3. Disconnect wire lead from the turntable motor. 4. Remove the two (2) screws holding the turntable motor to the mounting plate of the oven cavity bottom. 5. Pull the turntable coupling out of the oven cavity. 6. Turntable coupling and motor will be free. CONVECTION MOTOR REMOVAL 4. Take out the convection motor assembly from the unit. The convection motor assembly is now free. 5. Remove two (2) screws and nuts holding the motor to mounting angle. 6. Convection motor is now free. 1.
R-9H58 CORD HOLDER REMOVAL 1. Remove the one (1) special screw holding the cord holder to the rear cabinet, using the special driver LHSTIX DLR4-100T. 2. Now, the cord holder is free. NOTE: When securing or loosening the special screw, LHSTIX DLR4-100T type screw driver should be used. POWER SUPPLY CORD REPLACEMENT Removal 1. CARRY OUT 3D CHECKS. 2. Disconnect the brown and blue wire leads of the power supply cord from the noise filter. 3.
R-9H58 DOOR DISASSEMBLY After adjustment, make sure of the following : 1. Door latch heads smoothly catch the latch hook through the latch holes, and the latch head goes through the center of the latch hole. 2. Deviation of the door alignment from horizontal line of cavity face plate is to be less than 1.0mm. 3. The door is positioned with its face depressed toward the cavity face plate. 4. Re-install outer case and check for microwave leakage around the door with an approved microwave survey meter.
R-9H58 MICROWAVE MEASUREMENT After adjustment of door latch switches, monitor switch and door are completed individually or collectively, the following leakage test must be performed with a survey instrument and it must be confirmed that the result meets the requirements of the performance standard for microwave oven. 2. 3. REQUIREMENT The safety switch must prevent microwave radiation emission in excess of 5mW/cm2 at any point 5cm or more from external surface of the oven.
32 Figure O-2. Oven Schematic-High or Easy Defrost or Reheat Sensor Cooking Condition ASYMMETRIC RECTIFIER RY3 CONVECTION HEATER H.V. RECTIFIER CAPACITOR 1.13µ AC 2100V COM MAGNETRON POWER TRANSFORMER TURNTABLE MOTOR CONVECTION MOTOR TTM CM RY2 COM. LOWER LATCH SWITCH SCHEMATIC NOTE: CONDITION OF OVEN 1. DOOR CLOSED. 2. “EASY DEFROST” PAD TOUCHED. 3. WEIGHT ENTERED. 4. START PAD TOUCHED. DAMPER MOTOR N.O. N.O. A-1 A-3 N.O. N.O. COM. H.V. RECTIFIER CAPACITOR 1.
33 COM. Figure O-4. Oven Schematic-Automatic Mix Cooking Condition H.V. RECTIFIER CAPACITOR 1.13µ AC 2100V CONVECTION HEATER MAGNETRON POWER TRANSFORMER TURNTABLE MOTOR CONVECTION MOTOR TTM CM COM LOWER LATCH SWITCH N.O. COM. H.V. RECTIFIER CAPACITOR 1.13µ AC 2100V MAGNETRON L THERMAL CUT-OUT 95˚C (FM) TEMP. FUSE 150˚C NOISE FILTER LOWER LATCH SWITCH POWER TRANSFORMER TURNTABLE MOTOR CONVECTION MOTOR TTM CM COM A-1 A-3 N.O. A-5 COM N.O.
1 2 3 34 4 9 7 5 CN-A T1 COM RY1 COM RY2 COM RY3 CN-E 6 5 4 3 2 1 ORG RY2(N.O.) RY1(N.O.) 5 9 WHT 8 LOWER LATCH SWITCH COM PNK ORG BRN N.O. MONITOR SWITCH COM ORG GR CONVECTION MOTOR OVEN THERMAL CUT-OUT 150˚C RED BRN GRY WHT GRY GRY GRY Figure S-1. Pictorial Diagram YLW 1 BRN YLW 2 GRY TURNTABLE MOTOR MONITOR RESISTOR RED CONVECTION HEATER WHT DAMPER MOTOR NOTE: Neutral (WHT) wire must be connected to the terminal with black dot on the oven light socket.
4 OVEN LAMP TURNTABLE MOTOR HEATING ELEMENT COM NO COM NO COM NO A5 FAN MOTOR POWER TRANSFORMER A3 A1 CONV. MOTOR DAMPER MOTOR A7 c RY1 RY3 RY2 RY6 RY5 D2 D3 C2 1000µ/35v C1 0.1µ/50v D30 Q26 KRC243M Q25 KRA101M Q24 KRA101M – D23 (J1) ZD2 Q1 2SB1238 470 1/2w + – Q22 KRA101M Q21 KRA101M Q20 KRA101M R3 330 1/2w 5 E1 C11 C3 0.1µ/50v C5 0.1µ/50v E5 6 DAMPER SWITCH E6 R51 4.7k C50 C60 Q40 KRA101M R8 4.
R-9H58 1 2 4 3 5 6 R A 1 DIP ,F B E Q90 1 2 R90 (ONLY PHR) (CF1) CF1 (R85) (C80) (R45) (C45) C7 R7 R8 C8 E E 5 C B Q4 B Q3 1 12 R79 R78 R77 R76 R75 6 7 12 C9 64 9 C5 4 5 D 1 8 3 14 CN - F 15 1 R40 16 17 18 6 R31 R30 E C3 D31 D30 C4 E Q1 D23 RY2 1 Q24 E B E E RY1 D21 D3 D4 D1 B D20 4 1 S1 1 5 P VRS1 3 5 7 DAMP M CONV M FAN M RY4 E F Q22 25 Q20 D2 E BE Q26 23 24 B RY5 C1 C20 BLK POWER C22 B Q21 21 C2 22 ZD2 D26 R2
R-9H58 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-9H58 Note: The parts marked "∆" may cause undue microwave exposure. The parts marked "*" are used in voltage more than 250V. REF. NO. IC2 Q1 Q3 Q4 Q20-23 Q24-25 Q26 Q40 Q90 R2 R3 R4 R7-8 R10-11 R30 R31 R40 R50 R51 R62 R63 R64 R70-81 R90-93 R100 RY1-3 RY4-6 SP40 T1 VRS1 ZD2 ZD3 ZD4 3- 2 3- 2-1 3- 2-2 3- 3 3- 4 3- 5 3- 6 3- 7 3- 8 3- 9 PART NO.
R-9H58 Note: The parts marked "∆" may cause undue microwave exposure. The parts marked "*" are used in voltage more than 250V. REF. NO. 4-32 4-33 4-34 4-35 4-36 4-37 4-38 4-39 4-40 4-41 4-42 4-43 4-44 PART NO.
R-9H58 HOW TO ORDER REPLACEMENT PARTS To have your order filled prompty and correctly, please furnish the following information. 1. MODEL NUMBER 3. PART NO. 2. REF. NO. 4. DESCRIPTION PACKING AND ACCESSORIES TRAY HOLDER (SPADFA348WRE0) PACKING PAD KIT CPADBA083WRK0 DOOR PROTECTION SHEET TURNTABLE TRAY SPADPA178WRE0 PLASTIC BAG SSAKHA012WRE0 INSTRUCTION BOOK AND COOK BOOK MICROWAVE OVEN ROLLER STAY TRAY PACKING FOAM SPADPA198WRE0 Not replaceable items.
H 1 2 3 41 4-8 7-7 x2 4-39 4-23 4 B 7-1 7-14 4-5 7-26 4-18 1-4 4-19 2-2 2-1 4-28 6-5 7-3 x3 7-14 7-10 x3 7-8 x8 5 2-1-2 2-1-1 7-23 4-41 1-15 6-9 7-28 7-19 4-43 7-22 4-2 7-6 2-5 1-18 2-12 A 1-5 x4 2-7 x4 4-26 7-1 1-10 1-10 1-8 1-9 B 7-10 x4 4-14 7-22 1-1 1-11 2-8 4-40 7-23 x3 7-20 4-28 4-39 4-36 7-22 7-32 4-15 4-20 1-21 7-16 7-24 4-22 1-20 1-14 4-10 1-3 2-11 2-10 4-29 7-12 7-15 x2 7-11 2-3 7-1 4-38 1-22 2-9 7-29 2-6 6-10
R-9H58 2 1 4 3 3-9 3-5 CONTROL PANEL PARTS 6 5 x4 3-8 A A x3 7-10 3-1 3-2 3-6 3-1E 7-10 3-1F B B 6-8 3-7 C C 3-2-2 7-10 3-2-1 DOOR PARTS 5 5-2 D D 5-1 7-19 x3 3-4 5-3 3-3 5-5 5-6 5-10 E 7-17 x3 7-25 7-17 E 7-18 x3 5-9 7-2 5-7 5-8 F F MISCELLANEOUS 5-4 6-6 6-1 6-2 G G 6-7 Actual wire harness may be different than illustration. 6-9 H 1 2 H 4 3 5 6 '96SHARP CORP. (8K0.
