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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-C120
Microwave Oven

WARNING TO SERVICE TECHNICIANS

EXCESSIVE MICROWAVE ENERGY

See the Service Manual of EM-C180US(SM-640179)
except the items described in this Service Manual.
CAUTION
FORM # EM-C120 (02/05)
EM-C160US
PRODUCT CODE NO. 437-453-00
REFERENCE NO.SM-640180

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Summary of Contents for Garland EM-C120

  • Page 1: Microwave Oven

    (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) REFERENCE NO.SM-640180 FORM # EM-C120 (02/05)
  • Page 2 CAUTION For microwave energy emission In the area emitting the highest reading, switch the On every service call. A check for micro- meter to SLOW RESPONSE and take a reading for wave energy emission must be made minimum of three (3) seconds. We recommended the according to the following manner.
  • Page 3 Power output Measurement ........1 Test Procedures ..........3 Precautions and Repair Service Tips ....... 1 Disassembly Instructions....... 3 •`4 Circuit Diagram ............2 Exploded View and Parts List......5 •`12 Overall Circuit Diagram.........13 •`16 1. SPECIFICATIONS 2. POWER OUTPUT MEASUREMENT Microwave output ....
  • Page 5 4. 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 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 7 6. 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 8 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 10 Main body Parts-2 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 11 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 18 Wiring of High voltage Circuit BACK BACK BACK BACK BACK FRONT FRONT FRONT FRONT FRONT Wiring of Switches Monitor switch Brown(C Inside) Orange(C) White (NO) Blue(NC Inside) Pink(NO Insde) Viewed from back Brown Light Blue Orange (NC) White/ Black Yellow Interlock switch Purple Purple...