Hoshizaki dcm-75ibah service manual 5VDC

•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, confirm 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	5VDC	5VDC
Water Dispense Signal	#8 (DBU)		to black K3	0VDC	5VDC

Red positive test lead to red K4 connector pin closest

to black K3 connector

Red Positive Test Lead

Multimeter

5VDC

Black Negative

Test Lead

Control Board K7 Connector

Water Dispense (DBU)	Water Dispense (BR)
(switch signal)	(5VDC power supply)

Fig. 3

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