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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
EM-C1900M(UK)
Pro.Code No. Model No.
437 624 00
EM-C1900MUK
REFERENCE NO. SM-6310023-00

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Summary of Contents for Sanyo EM-C1900M

  • Page 1 SERVICE MANUAL EM-C1900M(UK) Microwave Oven Pro.Code No. Model No. 437 624 00 EM-C1900MUK 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.
  • 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 Control Circuit Board..........23 Precautions and Repair Service Tips ......2 Circuit Diagram ............
  • Page 3: Specifications

    2.SPECIFICATIONS (1) Before the power is applied. (a) Open and close door several times to make sure Microwave output ....1,900W to 190W sure the door interlock switch and interlock monitor Frequency......2,450MHz monitor switch operation properly. Power supply ....... 230V, 50Hz (Listen for the clicking sound from switches.) Rated current .......
  • Page 4: Circuit Diagram

    5.CIRCUIT DIAGRAM EM-C1900M *Caution :The voltage between filament leads of magnetron is about 3.3VA.C, but the filament carries 4KV D.C high voltage with respect to grand. Never touch these lead with bare hand during operation. - 3 -...
  • Page 6 COMPONENT CHECKOUT PROCEDURE RESULT Measure the resistance: Across two terminals with Normal reading: an ohm-meter on highest scale. Momentarily indicates several ohms, HIGH-VOLTAGE and gradually to 10 meg-ohms. CAPACITOR Abnormal reading: Including Indicates continuity or 10 meg-ohms bleeder from the beginning. resistor Measure the resistance: Across two terminals with Normal reading:...
  • Page 8 - 7 -...
  • Page 9 B. TROUBLESHOOTING CONDITION TROUBLE CHECK RESULT REMEDY Connection of Power is applied with Poor Contact Reconnect S110 to S107 normal voltage Timer is set No display Power circuit board Voltage Replace Touch Select key cooking time (See page 6) incorrect Control circuit Voltage Replace...
  • Page 10 CONDITION TROUBLE CHECK RESULT REMEDY H.V Transformer Shorted Replace H.V Capacitor Shorted Replace Magnetron Shorted Replace H.V Diode Shorted Replace Fuse Diode Shorted Replace Low microwave Poor Magnetron Replace output oscillation Rotation of top or Rotation Repair or Uneven heating bottom anttena stop replace...
  • Page 12: Caution

    7. DISASSEMBLY INSTRUCTIONS - OVEN MUST BE DISCONNECTED FROM ELECTRI- - If the primary interlock switch, the relay 3 and 4 or the TRICAL OUTLET WHEN MAKING REPLACEMENTS, the interlock monitor switch operate properly, deter- REPA IRS, ADJUST MENT AND CO NTI NU IT Y mine which of the followings is defective : control cir- CHECKS BEFORE PROCEEDING WITH ANY RE- cuit board,blower motor, gear motor, high voltage trans-...
  • Page 13 F. CHANGING POWERSUPPLY CORD I.HOW TO RESET THE MEMORY OF ACCUMU- (See exploded view on page 15) LATIVE COOKING TIME (1) Unfasten 1 screw for earth and pull out 2 wires of power cord from terminal plate. 1. Push the keys step by step as follows, (2) Remove1 screw for bottom bracket of cord Turn the Timer Knob to left until display shows“0”.
  • Page 14 9 5 0 1900 1900 0 . . . ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Indication of remaining cooking time 1 . . . ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ To cancel remaining cooking time 3 8 0 1 9 0 ●...
  • Page 15 Maintenaunce: The microwave ovens are designed, manufactured, and tested for years of dependable operation. Howevre, the oven may require service from time to time if the consumable components listed below are not replaced at the appropriate time. For protection from unexpected service calls and undue inconvenience, we recommend that the user has the listed parts replaced at the intervals belows,(at customer cost).
  • Page 16: Exploded View And Parts List

    8. EXPLODED VIEW AND PARTS LIST Main body Parts-1 4x12 4x10 4x12 4x12 4x12 4x12 4x12 Parts marked with this sign have special characteristics important for microwave leakage. When replacing any of these parts use only manufacturers specified parts. - 15 -...
  • Page 17 3x10 4x12 3x12 4x10 Parts marked with this sign have special characteristics important for microwave leakage. When replacing any of these parts use only manufacturers specified parts. - 16 -...
  • Page 19 Main body Parts-2 4x10 4x10 4x10 4x18 4x10 15 16 3x30 4x12 Parts marked with this sign are supplied with high voltage exceeding 250V. Parts marked with this sign have special character- istics important for microwave leakage. When replacing any of these parts use only manufacturers specified parts.
  • Page 20 Parts marked with this sign are supplied with 4x10 high voltage exceeding 250V. Parts marked with this sign have special characteristics important for microwave leakage. When replacing any of these parts use only manufacturers specified parts. - 19 -...
  • Page 21 Main body Parts-2 EM-C1900MUK KEY No.SERVICE PARTS DESCRIPTION Q'TY 617 196 9245 BLOWER COMP. 415 003 1709 MAGNETRON 2M282K(M) 617 214 7628 THERMOSTAT NGT 03EN 150C 617 120 3431 DUCT,MAG.UPPER UPPER 617 120 3448 DUCT,MAG.LOWER LOWER 617 206 8220 CAPACITOR 0.1MFD 617 004 5230 MICRO SWITCH, MONITOR...
  • Page 22 Door Parts EM-C1900MUK KEY No.SERVICE PARTS DESCRIPTION Q'TY 617 201 9697 DOOR HANDLE 617 201 9680 DOOR BASE 617 120 3110 ORNAMENT PLATE UPPER 617 120 3127 ORNAMENT PLATE LOWER 617 226 5605 DOOR COVER ABS CE10 (T90) 617 257 2970 DOOR PANEL GLASS T3.2 617 121 5489...
  • Page 24: Overall Circuit Diagram

    9. OVERALL CIRCUIT DIAGRAM - 23 -...
  • Page 25 - 24 -...
  • Page 26 CONTROL CIRCUIT BOARD Figure 12 - 25 -...
  • Page 27 - 26 -...
  • Page 28 SANYO Electric Co.,Ltd. OSAKA Japan - 27 -...