WILLETT 430 - I;O Board

430 Ink Jet Printer Service and Maintenance Manual
62
Issue 2
Part No. 306-0430-102
I/O Board
The I/O board Figure 22 (
3
) is mounted over the CPU board and interfaces the printer to the following:
•
the ink system;
•
product sensors;
•
external devices.
The I/O board is connected to the CPU board via interboard connectors CON_B1, CON_D and CON_P0. The
I/O Board Circuit Diagram is included
Appendix A
in this manual.
Note: This manual describes only the issue 3 I/O board.
Major Components
(
1
) I/O board
(
2
) IC U20
(
3
) Ink Pump motor
driver board
(
4
) IC U1
(
5
) VR1
(
6
) 285 V DC power
supply
(
7
) IC U15
J1
401 - 0193-101 ISS 1
VALVES
I/O VALVES
D2
R23 R24
V3
R26
R10
R19
R27
C13 C12
R48
R37
R35
R16
R3
R38
R6
R14
J2
R1
CON 1
CON 2
R43
R45
R4
R44
R39
R52
R54
R55
R49
R50
R33
V5
C15
C14
R51 D10 D8 R53 D11 D9
C8
R28 JP1 V1
C1
C7
C9
R29
JP2
R31
R12 R13
R32
R7
R25
R11
R17
R20
R30
C3 R8
R9
C4
V4
C5 R21 C6 R18
C2
R22
R15 R2
R5
D4
J6 J7
Q10
Q9
D3
INHIBIT
IS01
Q2
Q5Q1
R42
R46
J4
Q8
123
R40
D7
R47
Q4
C10
Q3
R34
Q6 V7
C11
R36
D6
V6
D5
Q7
R41
V2
+ +
+
+
+
D
GDS
D
GDS
1
7
2
3
8
4
6
5
(
8
) IC U16
Figure 25 I/O Board Major Components