EPCB016

Machine not working problem du for solenoid valve installed in EPCB016 Board.

1 PRT3348 KIT, PREVENTIVE MAINTENANCE (UNITS W/O
ENTRAINMENT)
2 PRT3350 KIT, PREVENTIVE MAINTENANCE (UNITS W/ ENTRAINMENT)
6 PRT4402 ASSY, BATTERY 7.2V 6 D-CELL NICAD 5AH (Do not substitute)
11 PRT4407 ASSY, FLOW VALVE
12 PRT4409 ASSY, LCD DISPLAY
13 PRT4410 LED, ALARM
15 PRT3312 ASSY, PC BOARD COMPLETE WITH ALL IC'S
16 PRT3313 ASSY, PC BOARD, COMPLETE W DISPLAY & TOUCH
SCREEN
18 PRT4414 ASSY, PEEP VALVE
19 PRT4415 ASSY, PILOT VALVE
22 PRT4414 ASSY, PRESSURE VALVE
23 PRT4419 ASSY, SOLENOID VALVE "A"
24 PRT4420 ASSY, SOLENOID VALVE "B"
29 4416A CHARGER w/US HOSPITAL-GRADE CORD (Do not substitute)
30 4416B CHARGER w/EURO UNTERMINATEDCORD (Do not substitute)
32 PFIL008 FILTER, DUCK BILL
75 EOVE003 KEYPAD MATRIX 6 x 6
119 PVAL029 VALVE, PRESSURE RELIEF
121 PRT4425 MAX/DARV PRESSURE LINE
122 PRT4426 PEEP PRESSURE LINE
139 PRT4455 BACKLIGHT

Some boards don't have that contact, so the circuit can't work. Any advice for this problem?

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