Garland EM-C180 Service Manual Supplement

Garland microwave oven user manual

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SUPPLEMENT OF
SERVICE MANUAL
PRECAUTIONS TO BE OBSERVED BEFORE AND DURING
SERVICING TO AVOID POSSIBLE EXPOSURE TO
(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.
(e)(i) A microwave leakage check to verify compliance with the Federal performance standard should be
performed on each oven prior to release to the owner. (For U.S.A)
(e)(ii) A microwave leakage check to verify compliance with the Canadian Regulation, HEALTH AND WELFARE,
SOR/79-920 should be performed on each oven prior to release to the owner. (For CANADA)
Microwave Oven
SERVICE MANUAL SUPPLEMENT
for Model EM-C180
SUPPLEMENT OF
Microwave Oven
SERVICE MANUAL

WARNING TO SERVICE TECHNICIANS

PRECAUTIONS TO BE OBSERVED BEFORE AND DURING
SERVICING TO AVOID POSSIBLE EXPOSURE TO

EXCESSIVE MICROWAVE ENERGY

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.
(e)(i) A microwave leakage check to verify compliance with the Federal performance standard should be
performed on each oven prior to release to the owner. (For U.S.A)
(e)(ii) A microwave leakage check to verify compliance with the Canadian Regulation, HEALTH AND WELFARE,
SOR/79-920 should be performed on each oven prior to release to the owner. (For CANADA)
Microwave Oven
See the Service Manual of EM-C180US(SM-640179)
except the items described in this Service Manual.
CAUTION
CAUTION
WARNING TO SERVICE TECHNICIANS
FORM # EM-C180 (02/05)
EM-C160US
EM-C160US
PRODUCT CODE NO. 437-453-00
PRODUCT CODE NO. 437-453-00
See the Service Manual of EM-C180US(SM-640179)
except the items described in this Service Manual.
REFERENCE NO.SM-640180
REFERENCE NO.SM-640180

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Summary of Contents for Garland EM-C180

  • Page 1: Warning To Service Technicians

    (For U.S.A) SOR/79-920 should be performed on each oven prior to release to the owner. (For CANADA) FORM # EM-C180 (02/05) EM-C160US EM-C160US PRODUCT CODE NO.
  • Page 2 The owner should be told not to use the microwave oven until it has been repaired completely. If a microwave oven is found to operate with the door open, report to Dept. of Service, the manufacturer and CDRH* immediately. Also tell the owner not to use the oven.
  • Page 3: Table Of Contents

    Adjustment Procedures ... 1 Specifications ... 2 Power output Measurement ... 2 Precautions and Repair Service Tips ... 2 Circuit Diagram ... 3 1. ADJUSTMENT PROCEDURES TO AVOID POSSIBLE EXPOSURE TO MICROWAVE ENERGY LEAKAGE, THE FOLLOWING ADJUST- MENTS OF THE INTERLOCK SWITCHES SHOULD BE MADE ONLY BY AUTHORIZED SERVICE PER- SONNEL.
  • Page 4: Specifications

    208±2Volts. 4.PRECATIONS AND REPAIR SERVICE TIPS PRELIMINARY A. SINCE NEARLY 4,000 VOLTS EXISTS IN SOME CIRCUITS OF THIS MICROWAVE OVEN, RE- PAIRS SHOULD BE CARRIED OUT WITH GREAT CARE. B. TO AVOID POSSIBLE EXPOSURE TO MICRO-...
  • Page 6: Test Procedures And Troubleshooting

    6. TEST PROCEDURES AND TROUBLESHOOTING CAUTION -DISCONNECT THE POWER SUPPLY CORD FROM THE WALL OUTLET WHENEVER REMOVING THE CABINET FROM THE UNIT. 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 7: Checkout Procedure

    COMPONENT CHECKOUT PROCEDURE Measure the resistance: Across two terminals with an ohm-meter on highest scale. HIGH-VOLTAGE CAPACITOR Including internal bleeder resistor Measure the resistance: Across two terminals with an ohm-meter on highest scale. HIGH-VOLTAGE DIODE RESULT Normal reading: Momentarily indicates several ohms, and gradually to 10 meg-ohms.
  • Page 8 COMPONENT CHECKOUT PROCEDURE Measure the resistance between terminals of F P C c o n n e c t o r a f t e r r e m o v i n g i t f r o m TOUCH KEY S101.(Figure 10) BOARD...
  • Page 9 WARNING: When removing the cabinet, you must disconnect the power supply cord from the wall oulet for your safety. Only the checkout procedure below needs the power supply on. TAKE GREAT CARE to avoid possible electrical shock. For your safety, proceed with the test only after removing the wire leads from the pri- mary winding of the high voltage transformer COMPONENT...
  • Page 10: Troubleshooting

    B. TROUBLESHOOTING CONDITION TROUBLE Power with normal voltage is applied. Place a cup of water inside microwave oven * “TIME”,”1”,”0” ,”0” Fuse(10A) blows and “START” keys off immediately are touched No display cooking time Cooking ope- ration will not start...
  • Page 11 CONDITION TROUBLE Low microwave output Uneven heating C. ERROR INDICATION The Display will show an error indication for self-diagonosis as follows. “E” means that a service technician is required . “U” means that user can correct the operation. Display Trouble Thermistor (on duct) sensies E-21 a temperature of 120°C or...
  • Page 12: Thermistor Chart

    THERMISTOR CHART Thermistor connector “HINT” PROCEDURE FOR DETERMING WHETHER THE UPPER MAGNETRON CIRCUIT OR LOWER MAGNETRON CIRCUIT IS DEFECTIVE. SYMPTOM:One magnetron does not work giving less than normal heat. Caution: Make sure that cabinet (outer wrap) and rear plate are not removed from the oven for your safety. 1.Operate oven as follows.
  • Page 13: Disassembly Instructions

    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 PAIR, WORK , WAIT AT LEAST 1 MINUTE, UNTIL THE CAPACITOR IN THE HIGH VOLTAGE AREA HAS FULLY DISCHARGED.
  • Page 14 HINT FOR LAMP-CHANGE Before removing the bulb access panel, pull out the main-plug. Change the faulty bulb and secure the bulb access panel. Plug the cord back in and check operation. F. CHANGING POWER SUPPLY CORD (See exploded view on page 15) (1) Unfasten 1 screw for ground and pull out the 2 wires of the power cord from the terminal plate.
  • Page 15: Additional Functions

    K. ADDITIONAL FUNCTIONS The following functions can be completed by the key operation described below. The Accumulative cooking time and the number of door opening /closings can be observed. The Type and level of the buzzer sound can be selected. The “display of remaining cooking time when cooking is temporarily stopped due to door opening”...
  • Page 16 Maintenance: The microwave ovens are designed, manufactured, and tested for years of dependable operation. However, 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 below, (at customer cost).
  • Page 17: Exploded View And Parts List

    8. EXPLODED VIEW AND PARTS LIST Main body Parts-1 NOTE: All component have special characteristics for safety and must be replaced using parts listed in this manual. All service on M/W ovens should be performed by a qualified technician using approved testing equipment.
  • Page 18 NOTE: All component have special characteristics for safety and must be replaced using parts listed in this manual. All service on M/W ovens should be performed by a qualified technician using approved testing equipment. Customers should not attempt replace component marked with a symbol.
  • Page 20 Main body Parts-2 NOTE: All component have special characteristics for safety and must be replaced usnig parts listed in this manual. All service on M/W ovens should be performed by a qualified technician using approved testing equipment. Customers should not attempt replace component marked with a - 20 - symbol.
  • Page 21 NOTE: All component have special characteristics for safety and must be replaced using parts listed in this manual. All service on M/W ovens should be performed by a qualified technician using approved testing equipment. Customers should not attempt replace component marked with a symbol.
  • Page 28: Door Sensing Switch

    ��������������� Wiring of Switches Monitor switch White (NO) L i g h t Blue (NC) Door sensing switch March/99 Wiring of High voltage Circuit ����� ��������� �������� ����� ����� ����������� ���������������� FRONT FRONT FRONT FRONT FRONT Brown(C Inside) Orange(C) Blue(NC Inside) Pink(NO Inside) Brown Orange...

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