Service Manual

21
2c) 5VDC CB K7 Connector: See Figs. 3, 4, 5, and 6.
a) Water Dispense Switch/Water Dispense Sensor
1. Push Button Model
CB K7 pin #3 (BR) or (W/BK) and pin #8 (DBU) or (P): 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) or (W/BK)
To
CB K4 pin #1 (pin
closest to CB black
K3)
5VDC 5VDC
Water Dispense Signal #8 (DBU) or (P) 0VDC 5VDC
Red Test Lead
Black Test Lead
Multimeter
5VDC
Control Board K7 Connector
Water Dispense Signal
#8 (DBU) or (P)
Fig. 3
Water Dispense Output
#3 (BR) or (W/BK)
Red test lead to
CB K4 pin #1
(pin closest to CB
black K3)