Epson FX Series Product Support page 143

GENERAL
Table 6-20 Setting of DIP Switch 2
sw Function
ON OFF
Factory
Setting
2-1
l/F board enable/disable (Note 1) Enable Disable ON
2-2
Buffer operation enable/disable
Enable
Disable ON
2-3
Flag reset timing 1
See Table 6-21
OFF
2-4
Flag reset timing 0 OFF
2-5
Self-test enable/disable Enable Disable OFF
2-6 Self-test mode selection
Line
monitor
Loopback
OFF
Note:
1. This interface board operates when switch'2-1 is ON, and d6es not
operate when it isOFF. Using this switch, the parallel interface of the
printer can be used with the serial board installed.
Table 6-21 Flag Reset Timing Selection
Vacant area for bytesin
the print buffer
SW2-3
SW2-4
261 OFF
OFF
352
OFF ON
624 ON
OFF
1,936 ON ON
Note:
1. The X-ON signalcan be sent when the vacant area reachesthe above value
6-22
EPSON PRINTERS
Table 6-22 Setting of Jumpers
Jumper
Function
Factory
Setting
J1
ON: Pull up "TTY-TXD" to + 12\/ via 470 ohm resistor (See Note 1) OFF
J2
ON: Connect "TTY-RXD Return" to signal ground (See Note 1) OFF
J3
ON; Connect "TTY-TXD Return" to signal ground (See Note 1)
OFF
J4
ON: Pull up "TTY-RXD" to + 12Vvia 470 ohm resistor (See Note 1) OFF
J5
ON: Pullup"DSR*to + 12V ON
J6
ON: Pull up "DCD" to + 12V
OFF
J7
A
ON: Select BK byte RAM (See Note 2)
OFF
B
ON; Select 2K byte RAM (See Note 2)
OFF
J8
A
ON or OFF Send X-ON/X-OFF
signal in RS-232C
level
ON Do not Send X-ON/X-
OFF signal in RS-232C
level
ON
B ON
OFF
ON
J7
A
Fixed (See Note 2)
"B
JX
ON
X-ON/X-OFF signal is used for
handshaking in Current Loop
mode (See Note 4)
OFF
Flag control is used for
handshaking in Current
Loop mode (See Note 4)
OFF
JF
OFF
ON
ON
JCL
ON; Receive data in Current Loop Mode. (See Note 5)
OFF
JRS
ON: Receive data in RS-232C Mode (See Note 5)
ON