Hoshizaki DCM-271BAH-OS Service Manual page 20

b) Ice Dispense
1. Push Button Model
CB K7 connector pins #2 (Y) and #3 (W/BK): "ICE" and "AM" LEDs are on: Before
engaging the ice dispense switch, check for the correct VDC from the locations given
in the "Disengaged" column in the table below. If the VDC is different than in the
table, replace CB. If the VDC is correct, engage the ice dispense switch. "ICE" LED
turns on. If not, check the ice dispense switch continuity when engaged (closed).
If the ice dispense switch is open when engaged, replace. If the VDC matches the
"Engaged" column below and the "ICE" LED does not turn on, replace CB.
Component
5VDC Power Supply
Ice Dispense Signal
Red test lead
to CB red
K4 pin #1 (pin
closest to CB
black K3)
5VDC CB K7 Connector
Pin # (Wire Color) To CB VDC Ground
#3 (W/BK)
To
#2 (Y)
Multimeter
5VDC
Red Test Lead
Ice Dispense (W/BK)
(5VDC power supply)
Fig. 5
Disengaged Engaged
Red K4 pin #1
(closest to CB
black K3)
Black Test Lead
Control Board K7 Connector
Ice Dispense (Y)
(ice dispense signal)
20
5VDC 5VDC
0VDC 5VDC