10-9) Eeprom Circuit; 10-10) Option Circuit; 10-11) Load Drive Circuit - Samsung RS2544 Service Manual

Circuit Descriptions
1-3) When the motor rpm is in 600∼700, it will stop automatically and it tries to resume after 10 seconds. If the motor is
not working properly after 5 time trials, it will rest for 10 minutes, then try to resume again. This process will be
done continuously.
Note) If there is an abnormal situation for the motor, the self-diagnostics will show the corresponding LED segment.

10-9) EEPROM Circuit

EEPROM is semiconductor memory not to be
erased. It can be used in the area of unstable
electric power.

10-10) Option Circuit

There are a variety of models that have a
different function. A different model can set up to
use option circuit as shown.

10-11) Load Drive Circuit

1) The control of load in the system is accomplished by the main PCB.
2) Most of relays or SSRs can control the compressor, refrigerator/freezer defrost heater, and several option functions.
3) For the compressor, #18 pin of micro processor signals High (5V). This signal enters #5 pin of IC3 and #14 of output
terminal which have base and collector functions of IC3 turns on and connects the GND. Relay 73 will be grounded
through #14 of IC. Magnetic field will generate so that the second side of RY73 is activated and 115V is supplied to
the compressor. On the other hands, if #18 of micro processor turns Low(0V), #5 of IC3, the current of RY 73 relay,
and magnetic field will shut down in sequence. A contact point in secondary side of Relay 73 is off. Finally compressor
will stop.
44
D602 OPTION
X CoolSelect Zone TM
No CoolSelect Zone TM
O