Overview; Printer Mechanism; Carriage Motor Specification; Paper Feeding Motor Specification - Epson Stylus C82 Service Manual

EPSON Stylus C82

2.1 Overview

This section describes the operating principles of the printer mechanism and electrical
circuit boards

2.1.1 Printer Mechanism

The basic component of the printer mechanism is same the Stylus C80/C70.
Only the ASF is newly designed.
For throughput improvement, the special use Flashing Box utilizes 0/80 digit bi-
direction.
Paper can be supplied by 0/80 digit bi-direction. (Economy printing only.)

2.1.2 Carriage Motor Specification

Table 2-1. CR motor Specification
Items
Type
Drive voltage
Coil resistance
Inductance
Drive method
Driver IC

2.1.3 Paper Feeding Motor Specification

Table 2-2. PF motor Specification
Items
Type
Drive voltage
Coil resistance
Inductance
Drive method
Driver IC
OPERATING PRINCIPLES
Specifications
DC motor with brushes
+42V ± 5% (voltage applied to driver)
27.1Ω ± 10% (per phase at 25 degree)
19.8mH ± 25% (1KH 1VmA)
PWM, constant-current chopping
LB11947
Specifications
DC motor with brushes
+42V ± 5% (voltage applied to driver)
22.3Ω ± 25% (per phase at 25 degree)
17.3mH ± 25% (1KH 1VmA)
PWM
LB11947

2.1.4 Paper Loading Mechanism (New ASF unit)

The ASF of this printer is newly designed. It has the following characteristics.
Uses a Retard Roller. (Laser printers also use this roller.)
New design of PF/ASF change mechanism. (Operating principle same as
previous.)

2.1.4.1 Drive Process

1. The motion of the PF Motor is always transmitted to the Combination Gear
Ratchet 65.6 but not transmitted to the LD Roller.
2. After receiving the paper feed command, the Carriage Unit contacts the A or B
ASF Trigger Lever.
3. At this point, the Change Lever extends in the direction of arrow C, locking the
Clutch mechanism.
4. The motion of Combination Gear Ratchet 65.6 is transferred to Clutch Gear 1.
5. LD Roller Gear 2 rotates one time (LD Roller rotates once), and then the LD
Roller is stopped by the Clutch Gear again contacting the Change Lever.
ASF trigger lever
B
LD roller
Retard roller
Combination gear ratchet 65.6
Figure 2-1. Drive Process
Overview
Revision A
A
Change lever
2
C
1
17