Samsung RS257BABB Service Guide - Page 49

Diagnostics 11-5) If alarm sound 1) If "Ding-Dong" sounds continuously Start Yes Isn't the door opened minutely? � Freezer door MICOM No. 60, Fridge door MICOM No. 54 - Regular voltage are 5V to Open : 0V to Close. � Separate the door S/W and check if the measured value of unit is changed from 0 to∞Ϊ according to S/W ON/OFF. No slightly NO Isn't water penetrated into the door S/W? YES Is the input voltage of NO main No. 60 and 54 changed at door-open, door-close? YES NO Is the state of inserted connector (CN30)being normal? YES NO Is the door S/W self-unit normal? Remove causes after comprehending the conditions of interference by door gasket, food etc. Exchange the door S/W. Troubleshoot the breaking of wire and bad door S/W. Connector not inserted. Troubleshoot poor contact. YES Main PCB and door S/W are normal. Exchange the door S/W. 2) If "Ding-Dong" sounds continuously Start Didn't you select Forced operation and Forced Defrosting? YES Do buzzer still sound after power-on again? Selected Release the Forced operation and Forced Defrosting functions, or turn NO ON again after power OFF. YES Check if there is any short parts due to foreign matters and the test jumper part in the main-PCB. Main-PCB is normal 49