Liquid Controls SP834 User Manual

INSTALLATION & OPERATION

MANUAL

SP834

Portable Printer System

DOC#: MN-834-A

POWER SWITCH & AUTO POWER OFF

This switch turns the printer on and off. If the printer is left on with no activity (no motion of the
print head) for more than 1.5 minutes, the printer will automatically turn off. To turn the printer
back on, turn off the power switch, then turn the power switch back on.

STATUS LED – when operating

The STATUS LED located on the front panel of the printer indicates the following:
OPERATING = RED

CHARGING = GREEN

OPERATING

When the power is turned on, and the printer is not receiving a signal from the T675, the RED
STATUS LED will illuminate steadily. When the printer is receiving a signal from the T675, the
RED STATUS LED will flash rapidly.

When the printer is NOT receiving a signal from the T675 and low battery power is detected, the
RED STATUS LED will flash once per second and the built-in beeper will beep at the same rate.
To reset the low battery condition, turn the printer off and back on. This low power indicator is
useful when troubleshooting printers that suddenly stop printing for no ‘apparent’ reason.
If the printer detects an internal problem during power-on, or if a printer mechanism fails during
operation, the RED STATUS LED will slowly flash indicating an error code. The error code is
displayed by the RED STATUS LED blinking a certain number of times, and after a 2-second
pause, the blinking resumes. Count the number of times to determine the error code. The error
codes are:

01 = LOW BATTERY POWER DETECTED
02 = PRINT HEAD CANNOT FIND HOME POSITION
03 = CANNOT FIND TOP-OF-FORM MARK
04 = PAPER OUT CONDITION DETECTED
05 = BAD CPU RAM OR EPROM
06 = BAD EXTERNAL RAM
07 = BAD REAL-TIME CLOCK
08 = STUCK KEYPAD
09 = FLASH ERASE ERROR
10 = FLASH PROGRAMMING ERROR

CHARGING

When charging power is first connected and if the battery is excessively discharged, the unit will
trickle charge the battery for several minutes until the cell voltage reaches approximately 0.9V.
While this initial trickle charge takes place the GREEN STATUS LED will flash every 1.5 seconds.
Once the trickle charge has raised the cell voltage enough, fast charge will automatically begin
and the GREEN STATUS LED will be illuminated steadily.

When the battery is fully charged, the GREEN STATUS LED will flash 2 times per second. If the
battery is completely charged and the printer is again connected for charging, depending upon the
battery voltage the GREEN STATUS LED will turn on for approx. 1 second 1-2 seconds after the
unit is first connected. The LED then turns off for several minutes and then begins flashing rapidly
2 times per second just as it does when fast charging is complete.

A fully discharged battery pack should take approx. 1.25 hours to be fully charged. It is safe to
leave the unit always connected for a charge. After fast charge, the battery will trickle charge at a
rate of C/50 which is (1/50 x 1.3aH) or 26 milliamps.

RECHARGING THE PRINTER

Insert 12VDC Probe into
lighter outlet

TOP OF FORM PUSHBUTTON (BLACK)

The TOP OF FORM pushbutton will cause the paper to advance to the top of the next form. Once
this button is pressed the paper will advance until the TOP OF FORM mark is detected. During
the paper advancement, the print head is constantly moved across the paper to help prevent the
paper from getting caught under the print head. Once the TOF mark is detected and the
pushbutton is released, the printer will home the print head and is then ready to operate normally.

TOP OF FORM is detected by the top of form sensor located at the right side of the paper tray
under the drag bar. The threshold of the sensor is factory calibrated.

PRINT PUSHBUTTON (RED)

The PRINT pushbutton will cause a ticket to be printed as long as the printer is receiving a signal
from the T675 and the RED STATUS LED is flashing rapidly. First, the ticket information is stored
in the ticket storage memory. Next the paper advances to the top of form (if it is already at top of
form, the paper will back up slightly then advance forward so that the ticket is aligned with the
upper edge of the top of form mark). Finally, the print head returns to home (leftmost) position,
and the ticket is printed. The paper is then advanced to the top of the form position so the ticket
can be easily removed from the printer.

SETTING THE TIME AND DATE

The time and date are received from the T675 and therefore must be changed in the T675 in
order to be changed on a ticket.

PRINTER CONROL PC BOARD