Garland EM-C180 Disassembly Instructions, A. Removing Interlock Switch, C. Removing Fuse

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 RE- PAIR, WORK , WAIT AT LEAST 1 MINUTE, UNTIL THE CAPACITOR IN THE HIGH VOLTAGE AREA HAS FULLY DISCHARGED.

A. REMOVING INTERLOCK SWITCH

(See Figure 1 on page 1)

(1)Disconnect all lead wires from the interlock switches.

(2)Remove 2 screws securing the lever stopper.

(3)Remove 1 screw securing the switches.

Then pull out the switches.

(4)Make the necessary adjustment, and perform a microwave energy leakage check according to

“ 1 . A D J U S T M E N T P R O C E D U R E F O R SWITCHES” on page 1. Check proper operation according to “CHECKOUT PROCEDURE FOR SWITCHES” on page 6.

B.REMOVING INTERLOCK MONITOR AND DOOR SENSING SWITCH

(See Figure on page 1)

(1)Disconnect all lead wires from the interlock moni- tor switch and door sensing switch.

(2)Remove 1 screw securing the these switches. Then pull out the switches.

(3)Make the necessary adjustments or replace- ment of the switch by reversing step (2) and check microwave energy leakage according to

“ 1 . A D J U S T M E N T P R O C E D U R E F O R SWITCHES” on page 1. Check proper operation according to “CHECKOUT PROCEDURE FOR SWITCHES” on page 6.

WHEN REPLACING ANY DOOR MICROSWITCH, REPLACE ONLY WITH THE SAME SWITCH SPECI- FIED ON THE PARTS LIST.

C. REMOVING FUSE

Remove the 10A fuse with screwdriver.

NOTES

-When replacing the 10A fuse, be sure to use the exact repair part.

-If the 10A fuse blows immediately, check the primary and secondary interlock switch, the relays RL-3 and RL-4 (on the control circuit board) and the interlock monitor switch according to “CHECKOUT PROCE- DURE FOR SWITCHES” on page 6. Make sure to check the microwave energy leakage according to “1. AD- JUSTMENT PROCEDURE FOR SWITCHES” on page 1, when the primary and secondary interlock switches, the relay RL-3 and RL-4 or the interlock monitor switch is adjusted or replaced.

-If the interlock switch, the relay RL-3 and RL-4 or the interlock monitor switch operate properly, determine which of the following is defective : control circuit board, high voltage transformer, high voltage capacitor, high voltage diode or magnetron.

D. REMOVING DISPLAY CIRCUIT BOARD

(1)Disconnect all lead wires on the Control panel from the Control PCB and Power PCB.

(2)Remove 4 screws securing the Control panel Ass’y to the oven cavity.

(3)Push up and pull out the Control panel Ass’y.

(4)Remove 4 screws securing the Display PCB.

(5)Take out the Display PCB and push up the lever

end of the plastic fastener and remove the FPC connector from the connector socket S101.

CAUTION:

When replacing new Display PCB please ensure that all 10 LED heads are positioned exacty into the square holes of the control frame at once.

Never force any LED head into the PCB.

E. REMOVING MAGNETRONS

(1)Remove 1 screw securing the thermal protector .

(2)Disconnect 2 lead wires from the magnetron terminals .

(3)Remove thermistor (lower magnetron) by pulling horizontally.

(4)Remove 4 hex nuts (upper magnetron) or 2 hex nuts (lower magnetron)securing to the waveguide.

(5)Remove magnetrons.

(6)Take out the magnetron VERY CAREFULLY.

NOTES

-When removing the magnetron, make sure that its dome does not hit any adjacent parts, or it may be damaged.

-When replacing the magnetron, be sure to install the magnetron gasket in the correct position and be sure that the gasket is in good condition.

-After replacing the magnetron, check the microwave energy leakage to ensure it is below the limit of 5mW/cm2. (For US)

-After replacing the magnetron, be sure to check the microwave energy with a leakage detector and

confirm it is below the limit of 1 mW/cm2 (at 275cc water load),5 mW/cm2 (at no load) and 5 mW/cm2 (at 275 cc water load without cabinet) when measured with a detector. (For CANADA)

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