User's Manual

1 DATECS DPP-250 User manual
13
9. Diagnostic Information
The DPP-250’s LF switch/button is used for entering various printer
modes. These modes can be used to assist developers in debugging
problems related to programming and communication. The following
explain how to access the various operating modes.
Step #1: Make sure the printer is OFF (On-line LED is OFF) before
performing step #2.
Step #2: Press and hold the line feed button (LF). While pressing
the (LF) button, press the (POWER) button momentarily
and release when one of the conditions below:
LF Button Operation Modes
Holding LF button while power on
for ~ 0.5 sec and releasing it
after 1-beep.
SHORT SELF TEST print.
Holding LF button while power on
for ~ 2.5 sec and releasing it after
2-beep.
Hex DUMP mode. All
input data are printed as
hexadecimal.
Holding LF button while power on
for ~ 4.5 sec and releasing it after
3-beep.
LONG SELF TEST print.
Holding LF button while power on
for more than 8.5 sec and releasing
it after the 5-beep (long 4-tone)
beep.
Program mode –
loading the printer
firmware.
Holding ON button while power on
for ~ 4 sec and releasing it after 1-
beep.
Temporary forcing
9600 bps serial speed.
Holding ON button while power on
for ~ 6 sec.
Hardware Setup Mode.
Table 5
Note: Care must be taken when entering operating modes to prevent the
clearing of factory preset configuration information.
Self-test
The DPP-250 has a built-in test pattern that shows the printer’s current
configuration as well as the various resident printer fonts. The self-test
can also be used as a troubleshooting tool to determine printing
problems or battery level. The steps below show how the self-test is
printed activated.