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Enclosure Reassembly
9
Figure 2-4. 590 AG Indicator CPU Board
2.4
Enclosure Reassembly
Once cabling is complete, position the backplate over the enclosure, reconnect battery cable, and reinstall the
backplate screws. Use the torque pattern shown in Figure 2-5 to prevent distorting the backplate gasket. Torque
screws to 15 in-lb (1.7 N-m).
Figure 2-5. Enclosure Backplate
Torqued screws may become less tight as the gasket is compressed during torque pattern, therefore a second
torque is required using the same pattern and torque value.
R12
C34
C33
D3
D4
RN1
C40
C38
C36
C39
C35
R23
C72
C73
C71
C74
C78
C76
R27
R28
C81
C83
R24
R25
R31
D5
F1
C80
EMI1
R46
R45
R44
R40
R39
R38
R37
C92
C91
C90
R34
R33
R43
C84
C85
U15
C77
VR2
D1
R2
C31
C32
R1
C1
L2
C28
U1
VR1
L1
C13
C6
R7
C10
C9
R26
C79
C75
U6
C14
R32
R29
C82
C2
XT1
C4
C8
C7
C3
C5
R6
R5
R3
R4
C41
R15
R14
C37
C42
Q1
C11
C12
R30
C86
C87
C15
U12
U10
U7
U11
R8
C17
C18
C19
R9
C16
C20
C27
U9
C88
C89
VR4
U8
R49
R50
C95
R48
R42
R41
C94
C93
R35
R36
R47
RICE LAKE WEIGHING SYSTEMS
1
RESET
AGND
DGND
+SIG
–SIG
+SENSE
–SENSE
SHIELD
+EXC
–EXC
1
2
3
4
5
6
7
LOAD CELL
CONNECTOR
J1
JP2
JP1
D2
J5
Keypad Connectors
(J5 and J7)
1
J4
J2
TxD
GND
RxD
1
2
3
SERIAL PORT
1
J3
Battery
Input
AC
Adapter
Input
1
J6
To Setup
Switch
A / D C o n v e r t e r
GND
GND
1
J7
VR3
U4
Microcontroller
U5
FLASH RAM
U2
U3
Display Drivers
R11
C29
R13
C30
RN2
+
+
+
C26
C23
C25
R10
C21
C22
C24
+
1
3
4
5
6
2
7
Torque backplate screws
to 15 in-lb (1.7 N-m)
Torque
pattern
8
Grounding
Screw
Note
Summary of Contents for 590 AG
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