Hoshizaki SRK-10J Service Manual page 21

4) To verify voltage output from CB to the components, slide the CB K1 connector out far
enough to allow multimeter lead contact. With the icemaker in the cycle to be tested,
check output voltage from the corresponding pin on CB K1 connector to a neutral (W).
If output voltage is not found and the appropriate LED is on, replace CB.
5) Check CB control connectors K3, K4, and K5 for correct VDC per the table below.
Note: Pin #1 is DC ground (GND) on each connector.
Legend: CB–control board; CT–control transformer
K3 Thermistor
Pin #
#1 to #2
#1 to #3
ALARM RESET
#2 to #3
K2
1 2
K4 Bin Control
VDC Pin #
5VDC
#1 to #2
5VDC
#1 to #3
OUTPUT TEST
0VDC #2 to #3
Thermistor
Bin Control
Float Switch
ON
1 2 3 4 5
3
VDC
Pin #
5VDC #1 to #2
5VDC #1 to #3
0VDC
#2 to #3
CB
21
K5 Float Switch
VDC
1.2VDC
2VDC
1.2VDC