Samsung SR-L676EV Service Manual

Also see for SR-L626EV: Owner's instructions

Contents

Samsung Electronics 232) Key ScanThe grid waveform of each output is supplied to each button line through switching diode(IN4148). The grid #1 signal goes to the setting button of refrigerator. Then, refrigerator buttonis pressed, around 4.5V goes to IC05(UAN2981A) pin 8 through key input line. MICOM detectsthe refrigerator button pressed after MICOM pin1 receives the signal.If MICOM outputs “high” signal to driver-IC(ULN 2803) according to each load operationconditions, IC turns on and DC 12V flows to ground through the relevant relay coil. Then, core ismagnetized by the coil current, and relay contact switches on. When relay contact is on, AC POWERis supplied to the relevant operation load, then which will be activated. If MICOM outputs “low”signal, load operation stops with the relevant relay contact off.8. Load Operation97531975315319753197531531IC0618 111 812 713 615 415 317 218 117 2Vcc GNDULN2803IC07+12RY01RY02RY03RY04RY05RY06RY07RY08R0310KC2410414(COMP-COOL FAN) 1618192122(F-LAMP)23(F CIRCLE-FAN)(COMP) 2417(R-DEF-HET)SWING MOTOR(R CIRCLE-FAN)(R-LAMP)9AC1RCINETWORK+12(DC12V)C27104P05P07P11P12P14P15P17P10P06P16(F-DEF-HET) 15C25104R0210KIC06RY09SPK1-4SQ-1201V12CON8CON10CON9REDR-Defrost heaterCOMP COOL FANSWING MOTORR-C/FANF-C/FANCOMP.R-LAMPF-LAMPF-Defrost heater