Service Manual

21
• 5VDC CB K7 Connector: See Figs. 3, 4, 5, and 6.
• Water Dispense Switch/Water Dispense Sensor
f. Push Button Model–"WTRDP" LED is on: Before engaging the water 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 water dispense switch. "WTRDP" LED turns on. If
not, conrm that the water dispense signal VDC matches the "Engaged" column in
the table below. If not, check the water dispense switch continuity when engaged
(closed). If the water dispense switch is open when engaged, replace the water
dispense switch. If the VDC matches the "Engaged" column below and the "WTRDP"
LED does not turn on, replace CB.
5VDC CB K7 Connector
Component Pin # (Wire Color) To CB VDC Ground Disengaged Engaged
5VDC Power Supply #3 (BR)
To
Red K4 pin closest
to black K3
5VDC 5VDC
Water Dispense Signal #8 (DBU) 0VDC 5VDC
Red positive
test lead to red
K4 connector
pin closest
to black K3
connector
Red Positive
Test Lead
Black Negative
Test Lead
Multimeter
5VDC
Control Board K7 Connector
Water Dispense (DBU)
(switch signal)
Fig. 3
Water Dispense (BR)
(5VDC power supply)