Epson Stylus Pro 7500 - Print Mechanism Components

EPSON Stylus Pro 7500 Revision A
Operating Principles Print Mechanism Components 59
2.2 Print Mechanism Components
The major electrical parts used in the printer mechanism of this printer are as shown below.
Hereafter, we will explain each printer mechanism focusing on these parts.
Table 2-1. Printer Mechanism Components
Part Drive voltage Description
Carriage components
B printhead
C printhead
+42VDC,
+28VDC,
-2VDC
B/C/M printhead,
LC/LM/Y printhead
Head thermistor +5VDC One in each printhead, B and C
CR motor +42VDC DC motor
CR_HP sensor +5VDC
Photo interrupter
active= CR out of HP
interrupted = CR in HP
CR encoder sensor +5VDC
Linear encoder
two channel A phase/B phase
Pump motor
(PG adjustment)
+42VDC,
+5VDC
4 phase 200 cycle HB type stepping
motor with internal encoder sensor
-also used for cleaning
PG (HD_SLID) sensor +5VDC
Photo reflector
reflected = in PG HP
unreflected = out of PG HP
P_Edge sensor +5VDC
Photo reflector
over threshold = paper exists
under threshold = no paper
Cutter solenoid +28VDC solenoid, cutter drive
Paper feed components
PF motor +42VDC DC Servo motor
PF encoder sensor +5VDC
Rotary encoder
two channel A phase/B phase
in PF motor
Paper suction fans (x2) +28VDC DC motor fan
P_Front sensor +5VDC
Photo reflector
over threshold = paper exists
under threshold = no paper
P_Rear sensor +5VDC
Photo reflector
over threshold = paper exists
under threshold = no paper
P_Thick sensor +5VDC
Photo interrupter
active= thick paper
interrupted = normal paper
Paper set lever position
sensor
+5VDC
Photo interrupter
active= thick paper
interrupted = normal paper
Ink delivery components
Pump motor
(cleaning)
+42VDC,
+5VDC
4 phase 200 cycle HB type stepping
motor with internal encoder sensor
also used for PG adjustment
Clwaing components
I/C sensors
(B/C/M/lc/lm/Y)
+5VDC
Microswitch 1/ slot
Open = no I/C
Closed = I/C installed
Table 2-1. Printer Mechanism Components (continued)
Part Drive voltage Description