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Manual No. 0158A
45/68
IWB
−
IWX Series (Overseas Use) Service Manual
Item 2. Main Board P-935
Parts side of the main board (fluorescent indicator tubes, LED and tactile keys are mounted on the
soldering side)
XJ1
XJ4
AD board
P933A
I/F board
P-934 (Contact
BOX)
XJ2
XJ3
SW1
Memory
Switch
2
1
1
1
2
4
6
17
1
18
10
9
RS232C
Input/output
Power
5V
input
(1) SW1 Memory Switch
Used for data re-writing at Test Mode initialization
Used for storing the data in E2ROM (data re-writing) after changing country No., scale No. and
span adjustment in Test Mode.
(2) Connector XJ1
Connector for connecting with I/F board P-934-1
PIN No. Signal code
P-934 XJ3
PIN No. Signal code
P-934 XJ3
1
IN1
1
6
NC
NC
2
OUT4
2
7
RESET
NC
3
OUT3
3
8
VPP
NC
4
OUT2
4
9
GND
NC
5
OUT1
5
10
VCC
10
(NC: non-connecton)
(3) Connector XJ2
DC+5V input
PIN No.
Signal code
Wire color
to power supply CN2
1
GND
Red
1
2
GND
Red
2
3
+5V
Red
3
4
+5V
Red
4