Samsung RS21 Service Manual

Also see for RS21: User manual

Contents

64F-SENSORMain PCBAss'yF-DEF-SENSORHOME BAR S/W2134F-DOOR S/W(If Door Close : 1<->2 OPEN)Measuring Terminals(1<->9)Measuring Terminals(5<->10)2134R-DOOR S/W(If Door Close : 1<->2 OPEN)R-SENSORR-DEF-SENSOR1234567891011Check with power applied.The Door S/W is a two-contact switch. Onedetects Door Open/Close with DC 5V at thePCB and the other one turns on/off the roomlight.(R-Room Light)1 . Check if the light comes on by opening the R-Door. If it lights up, check if the light goes off by pressing downthe Door S/W with the door open.If there is any problem, check the R-Door S/W.(R-Door Open Sensing Part of MAIN PCB)1 . Place the positive(+) terminal on CN30 No.⑤ and the negative(-) on No.⑩.And,check the voltage.2. When the voltage is DC 5V with the door open, it is normal.3. When the voltage is DC 0V with the door closed, it is normal. If there is any problem, check the Door S/W andthe wire connections.(F-Room Light)1 . Check if the light comes on by opening the F-Door. If it lights up, check if the light goes off by pressing downthe Door S/W with the door open.If there is any problem, check the F-Door S/W.(F-Door Open Sensing Part of MAIN PCB)1 . Place the positive(+) terminal on CN30 No.① and the negative(-) on No.⑨. And,checkthe voltage.2. When the voltage is DC 5V with the door open, it is normal.3. When the voltage is DC 0V with the door closed, it is normal. If there is any problem, check the Door S/W andthe wire connections.Disconnect the connector from the Main PCB,than measure the resistance of the followingsensors.1. Check the resistance the Freezer sensor cn30 between the no. 2 and 3.2. Check the resistance the Fridge Room sensor cn30 between the no. 6 and 7.3. Check the resistance the F Defrosting sensor cn30 between the no. 2 and 4.4. Check the resistance the R Defrosting sensor cn30 between the no. 6 and 8.5. Check the resistance between the no. ① and ④ the ambient Air sensor cn31.6. Check the resistance between the no. ③ and ④of the Ice-Maker sensor cn90.7. Check the resistance between the no. ⑬ and ⑭ of the CoolSelect Zone TMsensor cn51.8. Decide the sensor by comparing above resistances to the temperature ofeach sensor with the conversion table of sensor resistance and voltage fromthe reference temperature of Ref. 6 on this manual.※When the resistance is ∞Ωor 0Ω,check the connection of electric wire andsensorconnector.Appendix ⅠⅠ(Reference for circuit diagnostics)Ref. 1) Check sensorsRef. 2) Check Door S/W