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3.5
Indicator Lamps
The following lamps are located on the control panel.
3.5.1
SEL Lamp (Green)
This lamp is lit when the printer is in the SELECT state.
3.5.2
PE Lamp (Red)
This lamp is lit when the PE microswjtch is activated.
3.5.3
Power-On Lamp (Green)
The lamp is lit when the printer power is on.
3.6
Other Functions
3.6.1
Self-Test Function
Ml550SEP has a Self-Test function to check printing operation. To activate Self-Test, perform the
following steps:
(a) Turn power ON. Check to see that the carriage is returned to the left home position. Turn power
OFF.
(b) Install paper (see Section 2-3),
(c) With the TOF button depressed, tum power ON, then release the TOF button. The printer will
automatically print the preprogrammed test pattern, perform line feed, and print again. The Self-
Test function will continue, providing a sample of the print capabilities.
(d) To stop Self-Test, tum power OFF.
3.6.2
Print Start Conditions
There are following conditions which causes print start, in addition to receiving the print command
from host computer.
(a) When data for whole one line without any print command is received. (Whether line feed is
performed or not is determined by changing the DIP switch.)
(b) When there are data remaining in the line buffer at the time of deselection of the printer. In this
case, the printer prints out data in the line buffer, and stops the head carrier at the position
where printing of all remnant data is completed.
(c) When the print data buffer becomes full. The printer prints out data and stops the head carrier.
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