Epson SQ-B50/2550 Technical Manual page 137

Table 2-8. Ink-end Signal
REV.-A
Situation
IE Sensor Switch ICE sensor switch lE Signal
ICE Signal
Ink cartridge present!
closed
closed
LOW LOW
ink present
Ink cartridge present/
closed HIGH
LOW
no ink remaining
open
Ink cartridge not
open HIGH
HIGH
installed
open
Wasted ink absorbent Ink end detection spring
Level
in d icato r
--+-~=---....I
1
.....
A . Ink end detection plate
Figure 2-84. Composition of Ink Cartridge
Ink draining needle
lE IEC sensor
"I,...
Ink supply needle
~~-'~
I
".
Figure 2-85. Composition of Ink Cartridge Holder
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