7
Troubleshooting
No lights on the control panel
Check the power supply cable connections and the power outlet.
ERROR LED on (not flashing) with no printing
If PAPER OUT is on, the roll paper is not installed or is near the end.
If PAPER OUT is off, the printer cover is not closed properly.
ERROR LED flashing with no printing (and no paper jam)
Printing stops if the head overheats and resumes automatically when it cools.If
overheating is not the cause, turn the printer off, and after 10 seconds, back on.
DIP Switch Tables
* Only when DIP Switches 1-7 and 1-8 are on, the
transmission speed can be selected from one of seven
speeds: 2400, 4800, 9600, 19200, 38400, 57600, and
115200 bps by conrol commands. The default is 38400.
*1: For USB I/F, DIP Switches 1-3 and 1-4 are Undefined.
*2: For Parallel I/F, DIP Switch 1-8 is Undefined.
DIP switch 1 (Serial Interface)
SW Function ON OFF
1-1 Data receive error Ignored Prints “?”
1-2 Receive buffer
capacity
45 bytes 4K bytes
1-3 Handshaking XON/XOFF DTR/DSR
1-4 Data word length 7 bits 8 bits
1-5 Parity check Enabled Disabled
1-6 Parity selection Even Odd
1-7
1-8
Transmission speed (See table A.)
Table A
Transmission speed (bps)-bits per second 1-7 1-8
Adjustable by control commands* ON ON
4800 OFF ON
9600 ON OFF
19200 OFF OFF
DIP switch 1 (Parallel/USB Interface)
SW Function ON OFF
1-1 Auto line feed Always
enabled
Always
disabled
1-2 Receive buffer
capacity
45 bytes 4KB
1-3
*1
Select paper sensors
to output paper-end
signals (default value
of a command) from
parallel I/F.
Disabled Roll Paper end
sensor enabled,
Roll Paper near-
end sensor
enabled
1-4
*1
Error signal output
from parallel I/F
Disabled Enabled
1-5~
1-7
Undefined
1-8
*2
Power saving
function for USB
Disabled Enabled
DIP switch 2 (Serial/Parallel/USB Interface)
SW Function ON OFF
2-1 Handshaking
(BUSY condition)
Receive buffer
full
Offline or
Receive buffer
full
2-2 Do not change
settings
Fixed to OFF
2-3
2-4
Print density/
Liner-free label
See Table B
2-5 Release condition
of receive buffer
BUSY (If receive
buffer capacity
set to 4 KB.)
Releases BUSY
when remaining
receive buffer
capacity
reaches
138 bytes.
Releases BUSY
when remaining
receive buffer
capacity
reaches
256 bytes.
2-6 Do not change
settings.
Fixed to OFF
DIP switch 2-7, 2-8 (Serial Interface)
SW Function ON OFF
2-7 I/F pin 6 reset Enabled Disabled
2-8 I/F pin 25 reset Enabled Disabled
DIP switch 2-7, 2-8 (Parallel/USB Interface)
SW Function ON OFF
2-7 Do not change Fixed to OFF
2-8 Do not change Fixed to ON
Table B
Paper Print density 2-3 2-4
Recommended liner-
free label
Fixed ON ON
Thermal roll paper
Normal OFF OFF
Medium ON OFF
Dark OFF ON
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