Epson SQ-B50/2550 Technical Manual page 238

REV.-A
09: Ink cartridge sensor
Select this mode to check the ink cartridge sensor. The state of the ink cartridge sensor is displayed
on the LCD panel. Check the ink cartridge sensor by operating it manually (i.e. install and remove the
ink cartridge in the ink cartridge holder).
To exit this mode, press the ON-LINE switch.
If a problem can not be corrected by replacing the ink cartridge sensor, replace IC6B (G.A.).
10: Ink end sensor
Select this mode to check the ink end sensor. The state of the ink end sensor is displayed on the LCD
panel. Check that the ink end sensor by operating it manually (i.e. move the ink end sensor using your
hand).
To exit this mode, press the ON-LINE switch.
If a problem can not be corrected by replacing the ink end sensor, replace IC6B (G.A.).
11: PE sensor
Select this modes to check the paper end sensor. The state of the paper end sensor is displayed on
the LCD panel. Check the paper end sensor by operating it manually (i.e. move the paper in front of
the paper end sensor).
To exit this mode, press the ON-LINE switch.
If a problem can not be corrected by replacing the paper end sensor, please replace IC6B (G.A.).
12: TE sensor
Select this mode to check the paper sensor. The state of the paper sensor is displayed on the LCD panel.
Check the paper sensor by operating it manually (i.e. move the paper in front of the sensor).
To exit this mode, press the ON-LINE switch.
If a problem can not be corrected by replacing the paper exist sensor, replace IC6B (G.A.).
13: CSF sensor
Select this mode to check the CSF sensor. The state of the CSF sensor is displayed on the LCD panel.
Check the CSF sensor by operating it manually (i.e. move the CSF sensor usin your hand).
To exit this mode, press the ON-LINE switch.
If a problem can not be corrected by replacing the C.S.F sensor, replace IC6B (G.A.).
14:
CR encoder check
Select this mode to check the CR encoder. The state of the CR encoder and CR moving direction are
displayed on the LCD panel. Check the CR encoder signal and CR direction detection circuit in IC4B
by moving thecarriage with your hand).
To exit this mode, press the ON-LINE switch.
If a problem can not be corrected by replacing the carriage motor, replace IC4B (G.A.).
I
ENA=H ENB=L dir=CW
I
ENA: CR encoder A signal
ENB : CR encoder B signal
dir : CR direction CW : to the right
CCW : to the left
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