Panel Switches
Paper Feed button : Pressing the PF button momentarily will advance the paper one character line and
pressing it continuously will cause a fast feed at 15 lines per second.
Power Switch
A Power switch located on the lower left side of the printer is used to turn the printer on/off.
Indicators
This section explains the different patterns signaled by the two LED indicators located on the top cover
of the MD-500.
STATUS
LED1 LED2 LED3
REMARKS
GREEN RED RED
Power Off OFF OFF OFF Normal power is not supplied to the printer
Power On Flash ON ON Normal power is supplied to the printer
On line ON OFF OFF Normal error-free mode
Paper low ON OFF ON Insert new paper roll
Cover open ON Flash OFF Close cover
Paper empty ON Flash OFF Insert new paper roll
Paper jam
ON OFF
OFF Impossible to recover
OFF ON
Test mode ON ON OFF Ignored Paper Low
4. User Switches
While pressing the paper feed switch for more than 10 seconds after the printer in turned on, the self
test mode is initiated.
The printer self test includes a listing of the current default settings, read and write test of internal RAM,
checksum test of internal program memory, loop back detection statement, a staggered dot line, a few
lines of rotating character set, and a diagnostic report.
The printer then enters into the On-Line mode.
Configuration Setup
When the paper FEED switch is pressed and released instantly as the power is applied to the printer, the
printer will print the current printer configuration settings along with the DIP switch information.
If the printer setup needs to be changed, turn the Power Off before changing the setting.
The printer will be setup at the factory as follows;
Printer is setup as follows:
Model : MD-500
Firmware : Ver X.XX
Interface : Serial
Emulation : Epson TM-U200
CR Character : CR=CR only
Flow Control : DTR/DSR
Data Bits : 8 Bits
Parity : None
Baud Rate : 9600
CPL : 40/33 Char/Line
Two Color : Installed
Auto Cutter : Installed
Journal : Installed
3. Self Test
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