Epson C82305 - Manual (Page 15)

Table 7. Flag polarity selection
Jumper Function
Factory
setting
ON: MARK (do not accept data) =
JNOR
Current ON
O N
J5
JREV
ON: MARK (do not accept data)=
Negative EIA level
ON: MARK (do not accept data) =
Current OFF
ON: MARK (do not accept data)=
Positive EIA level
O F F
Note
Either the JNOR or JREV jumper must be connected.
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