Epson LQ-2550 Technical Manual page 152

2.3.11 Initialization Sequence
Figure 2-100 shows the initial sequence from power-on to printing operation.
No
T
Figure
NOTES: *1: For the setup operations marked with a *), use the value stored in the back-up memory.
*2: The platen gap detected by the PW sensor is converted into voltage Vs.
The sub CPU detects the paper end by comparing Vs with 2 X Vs.
WITH PAPER
1
I
I
voltage set
m e a s u r e m e n t
(using the PT
PAPER THICKNESS EZF
Paper loaded
voltage measurement
the PT sensor).
PG ADJUST
2-100. Printer Mechanism Initialization Sequence 1
POWER ON
PG HP SEEK
T
Platen surface voltage
measurement
PAPER THICKNESS EIF
-
s e n s o r ) .
CR CENTERING
(PAPER CENTER)
F E E D T.O.F I
PRINTING
2-106
TRACTOR
FRICTION
OUT
PAPER
the PW sensor).
I
1
. . . . .
,.,
. .. . .