Print Mechanism Components - Epson Stylus Pro 7400 Service Manual

EPSON Stylus Pro 7400/7800/9400/9800

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
Print Mechanism (Print Head) (p.150)
Print head
Head thermistor
Carriage (CR) Mechanism (p.151)
CR motor
CR HP sensor
CR encoder sensor
Ink mark sensor
(Detection in a direction parallel to
the Carriage movement)
PG HP sensor
P EDGE sensor (Paper width
detection)
Cutter Solenoid
Paper Feed Assembly (p.160)
PF motor
PF encoder sensor
Paper suction fans
P Rear sensor
(Paper presence detection)
P THICK 1/2 sensor
(Paper thickness)
Release sensor (I/C lever detection)
Cleaning Mechanism (p.163)
Pump motor
Ink pressure motor
Regulator solenoid
Operating Principles
Drive
Explanation
voltage
The number of nozzles: 180
---
Nozzle x 8 colors
+3.3V Incorporated in the print head
+42V DC motor
Transmission type photo-
+3.3V
interrupter
+5V Linear encoder (180LPI)
+3.3V/+5V Reflection type photo-interrupter
Transmission type photo-
+3.3V
interrupter
+3.3V/+5V Reflection type photo-interrupter
+24V DC solenoid
+42V DC motor
+5V Linear encoder (360LPI)
+24V The number of DC blowers: 3
+3.3V/+5V Reflection type photo-interrupter
Transmission type photo-
+3.3V
interrupter
+3.3V Leaf switch
+42V DC motor
+42V Stepping motor
+24V DC solenoid
Print Mechanism Components
Table 2-1. Printer Mechanism Components
Part
Ink Supply Mechanism (p.165)
Ink cartridge
Maintenance Tank
Refer
Others (p.166)
to
Cover sensor
(Front Cover open/close detection)
MAIN board
p.150
Radiator cooling fan
---
Take-up motor
Power Supply Circuit Board
p.152
p.152
p.152
p.152
p.154
p.155
p.159
p.160
---
p.161
p.162
p.162
---
p.163
---
---
Revision B
Drive
Explanation
voltage
+5V, +3.3V CSIC
+5V, +3.3V CSIC
+3.3V Leaf switch
--- Printer control/drive circuit board
+5V DC brushless fan
+24V DC motor
--- ---
Refer
to
---
p.164
p.166
p.167
---
---
p.168
149