Service Manual

21
2. Opti-Serve Model
CB K8 pin #1 (W/R), pin #2 (Y), and pin #3(W/BK): Before engaging the ice
dispense OS sensor, 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 reading is correct, engage the OS sensor. "ICE" LED turns
on. If not, conrm that the ice dispense signal VDC matches the "Engaged" column
in the table below. If not, replace the OS sensor. Ifthe VDC matches the "Engaged"
column below and the "ICE" LED does not turn on, replace CB.
5VDC CB K7 Connector
Component Pin # (Wire Color) To CB VDC Ground Disengaged Engaged
VDC Sensor Ground #1 (W/R)
To
Red K4 pin #1
(closest to CB
black K3)
0VDC 0VDC
Ice Dispense Signal #2 (Y)
0VDC 5VDC
5VDC Power Supply #3 (W/BK)
5VDC 5VDC
Fig. 6
Multimeter
5VDC
Control Board K7 Connector
Ice Dispense (W/BK)
(5VDC power supply)
Ice Dispense (Y)
(ice dispense signal)
Ice Dispense (W/R)
(VDC ground)
Red test lead
to CB red
K4 pin #1 (pin
closest to CB
black K3)
Red Test Lead
Black Test Lead