Paper Loading/Paper Feed Mechanism - Epson Stylus C110 Service Manual

EPSON Stylus C110/C120/D120

2.2.3 Paper Loading/Paper Feed Mechanism

The paper loading/feed mechanism are driven and controlled by the PF motor (DC
motor) and the PF encoder.
The PF motor drive force is transmitted to the LD roller and the PF roller via the gears
in the mechanism. In the loading mechanism, paper is fed to the PF roller from the ASF
unit, and the feed mechanism transports the paper during printing and ejects it.
The rotational direction of the PF motor switches between the loading and feed
operations as shown in the table below.
Table 2-2. Rotational Direction of PF Motor & ASF Operations
Rotational Direction*
Clockwise • Releases the change lever from the clutch mechanism.
• Feeds a paper into the printer and transports it.
Counterclockwise
• Locks the clutch mechanism with the change lever.
Note " * " : Rotational direction of the PF motor pinion gear as seen from the left side of the
printer.
Figure 2-7 shows how the PF motor drive is transmitted to the LD roller and the PF
roller. (The numbers in the figure indicate the sequence of the drive transmission.)
The PE sensor detects the paper top and bottom edges during the loading and feeding
operations. When the sensor could not detect the top edge of paper during the loading
operation, the printer causes a paper out error. And when the sensor could not detect
the bottom edge of paper during feeding operation, the printer causes a paper jam error.
For more details on the errors, see Chapter 3 "TROUBLESHOOTING"
OPERATING PRINCIPLE
Operations
(p42).
Printer Mechanism Operating Principles
Left side
Spur Gear A
(PF Roller)
PF Encoder Sensor
PF Scale
1
2 4
3
PF Motor
Pinion Gear
Transmission Gear
PF Motor LD Roller
PF Roller
EJ Roller
PE Sensor
<No Paper> <Detects Paper>
Low signal High signal
Spur Gear C
(PF Roller)
2
Combination Gear A
Combination Gear B
(Pump Unit)
Figure 2-7. Paper Loading/Feed Mechanism
Revision B
Spur Gear B
EJ Roller
PE Sensor
Right side
Combination Gear E
(LD Roller/Clutch)
Combination
Gear D
7
6
5
3
4
Combination
Gear C
(Change Lever)
26