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7. Reference 7-1 Checkpoints before service request SYMPTOM DIAGNOSIS REMEDY Measure an input voltage. (120V) Check circuit breaker. Measure an input voltage of power cord Make sure that the state of wire is housing. connected with power cord housing. Measure voltage of connector (CN101) Check the harness is inserted into the on Main PCB L1~N : 120V relay on sub PCB Replace or repair harness. Replace Main PCB. Oven is not operated Make sure that the relay on Main PCB Replace or repair harness. is properly worked. Replace or repair Main PCB. (No power, No display) Measure voltage regulator(IC102) on Open and close the door again. Main PCB. (Beeping sounds indicate that the food - IC102 : 7812A(DC 12V) is ready to be removed from the oven Measure voltage regulator(IC103) on after cooking is complete.) Main PCB. - IC103 : 7805A(DC 5V) Check whether valve of gas line is Make sure that valve is opened. opened Check whether ignition spark is Make sure that terminal of electrode is generated from the electrode connected to the spark module Cooktop is not worked Replace the electrode (in case of (Ignition fault) broken electrode or cut-off wire) Replace the spark module. Check whether harness is connected Repair and replace harness. to Broil, Bake and convection heater (Disconnected or Loosen) Measure the resistance of both ends of Repair the hot surface ignitor Oven temperature housing at hot surface ignitor ) is increased too slow Measure the voltage of Safety valve Repair the safety valve (This should be corrected to 3.3/3.6 amps VAC.) Make sure that heater relay and pattern Replace or repair relay. on main PCB. Replace or repair Main PCB. Check whether temperature is risen If relay on Main PCB has a short