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Page: 121
Service Guide OKIPAGE 18/18n
Chapter B RS-232C Serial Interface
RS-232C Serial Interface
(1) Connector
Printer side: 25 receptacle
l
Type: 17LE-13250-27 (D4CC) (made by DDK) or equivalent
Cable side: 25-pin plug
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Type: 17JE-23250-02 (D8C) (made by DDK)
(2) Cable
Cable length: 6 feet (1.8 m) max. (Cable shall be shielded)
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Note: Cable is not provided.
3) Interface signal
Pin No.
Signal Name
Signal
Direction
Compatible
Nibble
1
Frame Ground
FG
Frame ground
2
Transmitted Data
TD
<-- PR
Transmitted data
3
Received Data
RD
--> PR
Received data
4
Request To Send
RTS
<-- PR
Stay space level
5
-
(Not connected)
6
-
(Not connected)
7
Signal Ground
SG
Signal ground
8~17
-
(Not connected)
18
+5V
<-- PR
+5V (50mA max.)
19
-
(Not connected)
20
Data Terminal Ready
DTR
<-- PR
Data terminal ready
21~25
-
(Not connected)
Connector pin arrangement
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(4) Signal level
MARK polarity: -3V to -15V (LOGIC =1)
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SPACE polarity: +3V to +15V (LOGIC = 0)
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(5) Interface circuit
a) Receiving circuit
Summary of Contents for PAGE 18
Page 11: ...Figure 1 1...
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Page 43: ...5 Printing starts after the paper turns off the Write Sensor...
Page 53: ...The printing operation timing chart is shown below...
Page 65: ...Page 26 Service Guide OKIPAGE 18 18n Chapter 3 Parts Replacement Figure 3 1...
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Page 70: ...Page 28 Service Guide OKIPAGE 18 18n Chapter 3 Parts Replacement Figure 3 3...
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Page 191: ...Page 85 Service Guide OKIPAGE 18 18n Chapter 6 Troubleshooting Procedures 2 3 Paper feed jam...
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Page 224: ...Page 109 Service Guide OKIPAGE 18 18n Chapter 7 Wiring Diagram 7 1 Interconnect Signal Diagram...
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Page 238: ...Page 117 Service Guide OKIPAGE 18 18n Chapter 8 Parts List Figure 8 1 Printer Unit...
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Page 241: ...Page 118 Service Guide OKIPAGE 18 18n Chapter 8 Parts List Figure 8 2 Frame Main Unit...
Page 244: ...Page 119 Service Guide OKIPAGE 18 18n Chapter 8 Parts List Figure 8 3 Base Unit...
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Page 288: ...Duplex FEED JAM1...
Page 289: ...Duplex FEED JAM2 Duplex FEED JAM3...
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Page 296: ...Page 147 Service Guide OKIPAGE 18 18n Chapter C Duplex Unit Maintenance option 6 0 Parts List...
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