Part 9
TECHNICAL ISSUES
SERVICE PORT
Please note that this service port is designed for service operation only
and is
not for end users
. A conversion cable (P/N: 21863157600) is required
to connect this port to a RS-232 port to communicate with the host under
protocol 9600 bps, none parity check, 8 data bits, 1 stop bit for that purpose.
Improper use of this port may jeopardize the printer!
DIP SWITCHES
A set of DIP switches can be found at bottom of MP-300 when the
battery is removed as in below picture. Please note that these DIP switches are
mainly designed for service operation only and is
not for end users
. For
normal operation of MP-300, all switches must be set to “OFF”.
Improper
settings of these
switches may
jeopardize the printer!
The only adjustable switch for the user could be the switch position 1.
When this switch is set to “OFF”, the printer prints under normal printing
mode. When this switch is set to “ON”, the printer prints under high power
printing mode with following cautions. The high power printing mode helps
darken the
low duty ratio graphs/logo
s. However, if the high power printing
mode is applied on a high duty ration graph/logo, the battery life will be
greatly reduced.
BAR CODE PRINTING
For adequate readability of printed bar code, it is advisable to set the
bar code width to 3 (default value) or above.
For ladder type bar code printing, the bar code height is limited to 54
dots.
BATTERY POWER
The length of each service session of a fully recharged battery
depends greatly on printer power loading and battery condition. For reference,
an average brand new fully charged battery has been tested to support
continuous printing under BlueTooth interface for about 7 and half hours with
printed paper roll length of 420 meters.
