Connections On Pcb - Sanyo MDF-U53V Service Manual

Connections on PCB

The following shows the connections of connectors on the Temp. controller PCB.
Connector
CN1 Switching power supply
CN2 Network interface
Remote alarm terminal
#1: COM.
CN3
#2: N.O.
#3: N.C.
#1-#2 Temp. control relay
CN4
#3-#4 Heater relay
#1-#5: Switch PCB
CN5
#6-#7: Buzzer
CN6 Display PCB
#1-#2: Door switch
#5-#6: AT sensor
CN7
#7-#8: Filter sensor
#9-#10: Cascade sensor
#1-#2: Battery
CN8
#3-#4: Transformer
CN9 #1-#2: H. Comp. relay
CN10 Unused
CN11 #1-#3: Temp. sensor
Connects to
#1:6V #2:Battery switch
12
Usage
To supply the power to PCB.
To connect to MTR-480 option
Remote alarm contact outputs.
In normal condition, open for #1-#2 and
closed for #1-#3.
To control internal temperature (12VDC)
To supply the power to Cap. tube heater
(12VDC)
To connect to each switch
To connect to each LED
To control the door switch
To detect the ambient temperature
To detect the temperature in condenser outlet pipe.
To detect the temperature in cascade.
To supply the power during power failure
To supply the power to PCB.
To control compressor H ON/OFF (12VDC)
To detect the internal temperature.