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SERVICE MANUAL
Read this manual carefully, especially precaution on microwave energy, and follow the procedure strictly,
careless servicing and testing may expose yourself to the microwave energy leakage.
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 safety checks on all ovens to be serviced before activating the magnetron or other
microwave source, and make repairs as necessary:
(1)Interlock operation, (2) proper door closing, (3) seal and sealing surfaces (arcing, wear, and other
damage), (4) damage to or loosening of hinges and latches, (5) evidence of dropping or abuse.
(c) Before turning on microwave power for any service test or inspection within the microwave generating
compartments, check the magnetron, wave guide or transmission line, and cavity for proper alignment,
integrity, and connections.
(d) Any defective or misadjusted components in the interlock, monitor, door seal, and microwave generation
and transmission systems shall be repaired replaced, or adjusted by procedures described in this manual
before the oven is released to the owner.
Microwave Oven
Foreword
PRECAUTIONS
FILE NO.
EMO-SRT1(NX)
EMO-SRT1(SG)
Model No
Pro.Code No
EMO-SRT1NX
437 517 01
EMO-SRT1SG
437 517 00
REFERENCE NO.
SM-6410005-00
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Summary of Contents for Sanyo EMO-SRT1(NX)
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Page 1: Microwave Oven
FILE NO. SERVICE MANUAL EMO-SRT1(NX) Microwave Oven EMO-SRT1(SG) Model No Pro.Code No EMO-SRT1NX 437 517 01 EMO-SRT1SG 437 517 00 Foreword Read this manual carefully, especially precaution on microwave energy, and follow the procedure strictly, careless servicing and testing may expose yourself to the microwave energy leakage. PRECAUTIONS PRECAUTIONS TO BE OBSERVED BEFORE AND DURING SERVICING TO AVOID POSSIBLE EXPOSURE TO EXCESSIVE MICROWAVE ENERGY... -
Page 2: Table Of Contents
- TABLE OF CONTENTS - Adjustment Procedures ..........1 Test Procedures and Troubleshooting....4-10 Specifications ............2 Disassembly Instructions ......11-14 Power output Measurement ........2 Exploded View and Parts List ......15-22 Precautions and Repair Service Tips ....... 2 Overall Circuit Diagram......... -
Page 3: Specifications
2.SPECIFICATIONS A. SINCE NEARLY 4,000 VOLTS EXISTS IN SOME CIRCUITS OF THIS MICROWAVE OVEN, RE- Microwave output ....700W PAIRS SHOULD BE CARRIED OUT WITH Frequency ......2,450MHz GREAT CARE. Power supply ....... 220-230V, 50Hz B. TO AVOID POSSIBLE EXPOSURE TO MICRO- Rated current Microwave..5.0 Amp. -
Page 4: Circuit Diagram
5.CIRCUIT DIAGRAM Timer S301 Thermistor Magnetron Detector S101 (Infrared sensor) S201 S103 Shatter motor H.VDiode S104 H.V Capacitor Fuse Diode S102 Door Sensing SW H.V Transforemer RL-4 Geared motor RL-6 Lower Heater Upper Heater White RL-5 Main Relay Black Monitor SW RL-3 Lamp Main circuit side... -
Page 5: Test Procedures And Troubleshooting
6. TEST PROCEDURES AND TROUBLESHOOTING PRIMARY CAUTION WINDINGS -DISCONNECT THE POWER SUPPLY CORD FROM THE WALL Secondary OUTLET WHENEVER REMOVING THE CABINET FROM THE UNIT. Windings PROCEED WITH TESTS ONLY AFTER DISCHARGING THE HIGH VOLTAGE CAPACITORS AND REMOVING THE LEAD WIRES ON THE PRIMARY WINDING OF THE HIGH VOLTAGE TRANSFORM- ERS FOR LOWER AND UPPER MAGNETRONS. - Page 6 COMPONENT CHECKOUT PROCEDURE RESULT Normal reading: HIGH-VOLTAGE Measure the resistance: Across two terminals with Momentarily indicates several ohms, and an ohm-meter on highest scale. CAPACITOR gradually to 10 meg-ohms. Including internal Abnormal reading: bleeder Indicates continuity or 10 meg-ohms resistor from the beginning.
- Page 7 THERMISTOR CHART Duct Magnetron Thermistor connector 7. DISASSEMBLY INSTRUCTIONS - THE OVEN MUST BE DISCONNECTED FROM THE ELECTRICAL OUTLET WHEN MAKING REPLACE- MENTS, REPAIRS, ADJUSTMENT OR CONTINUITY CHECKS. BEFORE PROCEEDING WITH ANY B.REMOVING DOOR INTERLOCK SWITCH PAIR, WORK , WAIT AT LEAST 1 MINUTE, UNTIL (See Figure on page 1) THE CAPACITOR IN THE HIGH VOLTAGE AREA HAS (1) Disconnect all lead wires from the door inter-...
- Page 8 (6) Lift up the control circuit board from its C.REMOVING DOOR SENSING SWITCH left side and take out from the control base. (See Figure on page 1) (1) Disconnect all lead wires from the door sens- ing switch and door interlock switch. (2) Remove 2 screw securing the lever stopper.
- Page 9 I.RELEASING TYPE CONNECTOR This oven is provided with locked type connectors. When you remove a connector, pull the connector while releasing the lock by pressing “A” point shown below. Do not pull the wire of the connector. Connector: S1, S2, S102, S104 (Figure 13) Figure 13 Figure 14 Pull connector case (Never pull the wire)
- Page 10 Shatter Filter Hanging up Sensor Figure 16 Adjustment Method for Infrared sensor When Control PCB or Infrared sensor is changed, please carry the following ‘Initialization’ adjustment out for the Infrared sensor. Procedure 1. Prepare 250g ±5g tap water and ice 500g ±5g. 2.
- Page 13 8. EXPLODED VIEW AND PARTS LIST Main body Parts Parts marked with this sign have special Characterstics important for microwave leakage. When replacing any of these parts use only Parts marked with this sign are supplied with Manufacturers specified parts. high voltage exceeding 250V - 16 -...
- Page 14 Main body Parts Parts marked with this sign have special Parts marked with this sign are supplied with Characterstics important for microwave leakage. high voltage exceeding 250V When replacing any of these parts use only Manufacturers specified parts. - 17 -...
- Page 15 Main body Parts Parts marked with this sign are supplied with Parts marked with this sign have special high voltage exceeding 250V Characterstics important for microwave leakage. When replacing any of these parts use only Manufacturers specified parts. - 18 -...
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Page 16: Exploded View And Parts List
Main body Parts Key No Service parts No Description Spec. Q’ty 617 228 6303 FRAME 617 220 9593 DUCT FR-P.P E-7000 617 202 1577 THERMISTOR ASS’Y 617 221 7895 HEAT INSU. 617 227 6847 HEATER ASS’Y UPPER 617 227 6854 HEATER ASS’Y LOWER 617 154 4701 SPECIAL SCREW... - Page 17 Control Panel Parts Key No Service parts No Description Spec. Q’ty 1 617 227 4218 P.C.B COMP. CONTROL C-BOARD 2 617 219 6299 P.C.B COMP. SWITCH SW-BOARD 3 617 227 6939 CONTROL PLATE SUS430 HL#150 T0.4 4 617 219 7180 CONTROL PLATE PMMA 5 617 220 2365...
- Page 18 Door Parts Key No Service parts No Description Spec. Q’ty 1 617 219 6657 DOOR ASSY. COMP. 2 617 219 6787 DOOR ORNAMENT PLATE PC+ABS 3 617 229 6838 DOOR ORNAMENT PLATE SUS430 T0.3 4 617 219 6756 DOOR COVER 5 617 227 6724 DOOR PANEL 6 617 227 6731...
- Page 19 Packing Parts Key No Service parts No Description Spec. Q’ty 4 617 219 6251 TURN TABLE BASE 5 617 219 6466 BAKING TRAY 6 617 219 7630 TURNTABLE 7 617 219 7647 COOKING RACK SWM-B 8 617 227 7233 INST. MANUAL ENGLISH 9 617 216 0092 GLOVE...
- Page 20 9. OVERALL CIRCUIT DIAGRAM - 23 -...
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Page 24: Overall Circuit Diagram
Nov./99 Printed in JAPAN - 27 -...