Fresenius Medical Care 4008 E Technical Manual page 461

Fig.: Block diagram P.C.B. LP 639 Power logic
24V_SW
EM_HEAT_OFF
TEMP_ADJ
HEAT_OFF
Heater
TEMP_SET
control
HOT_RINSE
Control
NTC
220V_L1
220V_N
Fuse Fuse
Standby
STDBY
voltage
Power relay
STDBY
SW_ON_OFF
AUTO_ON
CPU_OFF
Fresenius Medical Care
Heater
relay
Triac
Heater rod
FROM_TRANS
Fuse
TO_TRANS
Fuse
Current
surge relay
Power failure
Switchon
alarm tone
logic
PWR_OFF
8-163
4008 4/09.03 (TM)
8.18.2 Circuit diagram and component layout diagram
P.C.B. LP 639 Power logic
8-164
Fresenius Medical Care 4008 4/09.03 (TM)
P.C.B. LP 639
Component layout diagram