12-4) Door S/W Sensing Circuit - Samsung RSE8KPAS Service Manual

Circuit Descriptions

12-4) Door S/W Sensing Circuit

- DOOR PARTS FUNTION
Terminal Operation
DOOR OPEN
Freezer
(No.31)
DOOR CLOSE
DOOR OPEN
Fridge
(No.32)
DOOR CLOSE
→ Door Parts Funtion
1 ) F-Room door open is picked up based on the state (5V/0V)of the MICOM No.31 Port.
When the F-Room door opens, it becomes short between the Door S/W 1&2.And Door S/W 3&4 open.
Vcc → R401 → Door S/W (3&4)open → R402(10K) → MICOM 31 PORT.
When the state of MICOM 31 PORT is 0.7V, the door is picked up as closed. When it is 5V, the door is considered to be open.
2) R-Room door open is picked up based on the state (5V/0V)of the MICOM No.32 Port.
When the R-Room door opens, it becomes short between the Door S/W 1 &2.And Door S/W 3&4 open.
Vcc →R403 → Door S/W (3&4)open → R404(10K) → MICOM 32 PORT.
When the state of MICOM 44 PORT is 0V,the door is picked up as closed. When it is 5V, the door is considered to be open.
3) When door open is detected, the MICOM have the relevant Fan Motor stop and the relevant Room Lamp light up.
Depending on the state of Door Open/Close,there are following operations; Lamp On/Off, Fan Motor On/Off and Door open alarm.
So, check relevant items upon A/S.
- SENSOR PARTS FUNTION
Volt(state)
F-SENSOR (51)
5V (HIGH)
F-DEF-SENSOR (52)
0.7V (LOW)
R-SENSOR (53)
5V (HIGH)
R-DEF-SENSOR (54)
0.7V (LOW)
EXT-SENSOR (57)
Terminal No
Micom terminal
voltage may
change
according temp.
77
Remark