eXtendo®
Thermal Printer Family
Part No. D-684-124
Mod. No. 4 270919 HW1
page 14 of 33
3.6.3.
LED Indicators
There are two LED indicators in the eXtendo® series printers, located as shown in Fig. 2 and
Fig. 3. The upper LED is red, and the lower one is green. These LEDs are used to signal
various status information concerning the eXtendo® printer. There are several flashing
speeds used in the printer LEDs. These are:
Slow:
0.5 Hz
(LED is “on” for one second and “off” for one second)
Medium: 5 Hz
(“on” for 100 ms and “off” for 100 ms)
Flicker (F): 10 Hz
(“on” for 50 ms and “off” for 50 ms)
0:
(off for 1 second)
1:
( on for 1 second)
Green
LED
Red
LED
Meaning
Slow
Off
Paper is loaded. Normal operation. Printer ready.
Medium
Off
Out of paper
Flicker
On
Data upload in progress (fonts, images, firmware, not
normal data communication). Do NOT disconnect or
power the printer off!
F
0
F
On
Printhead raised, printer stalled or over voltage
F
0
1
0
F
On
Paper error
F
0
1
0
1
0
F
On
Cutter error
Off
On
Boot failure
Flicker
Flicker
Initialization error
On
On
System “hung” during initialization
Please note that much more detailed information concerning the printer’s current state
and sensor conditions can be obtained by requesting the printer’s status (
eXtendo®
Emulation Command Set Reference D 684 112) or by using the eXtendo® Diagnostic Tool.
3.6.4.
Printhead Status Sensor
An additional Head Status Sensor is used to determine whether the printhead is in the up
(do not print) or down position (ready to print). Normally, most of the heat generated by
thermal printing is transferred to the paper being printed and so is removed from the head
as the paper advances. When the printhead is in up position no printing or paper loading is
possible.
The output of this sensor as well as the current printhead temperature is also available
from various query functions.
3.6.5.
Chute/Jam Sensor
The chute/jam sensor continually monitors whether there is paper in the chute, and can be
read via the Status function. This function is often used in conjunction with the host’s
peripherals to signal the user when a printout has not been taken. Examples where this is
important include when the information is confidential, or the printout can be redeemed
for cash or items of value. This function can also be used to prevent the host from sending
a new print job until the printout from the previous print job has been removed.
Additionally, the chute/jam sensor is monitored while first printing after a cut. After a cut,
the printer “knows” where the end of the paper is. As printing takes place, the printer also
“knows” when the edge of the paper should reach the sensor. If the paper does not reach
