Epson LX-300 Service Manual

LX~lW Service Manual
Operating
Principb
2.1.4 Ribbon Advance Mechanism
The ribbon is held between the ribbon advance roller (ribbon driven gear) and the ribbon pressure
roller. When the carriage moves on the CR guide shaft from left to right and vice versa, the timing
belt turns the belt driven pulley. Then the torque is transmitted to the ribbon driving gear through
the gear trains.
The ribbon driving gear rotates counterclockwise no matter what direction the
carriage moves, because a planetary gear is used in the gear linkage.
Table 2-3. Ribbon Advance Gear Linkage
1
Direction of Carriage Movement
Gear Linkage
I
Left to right
Belt driven pulley + Gear(1)+ Gear (2)+
(indicated by the black arrow)
Ribbon driving gear
Right to light
Belt driven pulley + Gear(1) -+ Gear (3)+
indicated by the white arrow)
Gear (4)
+ Ribbon driving gear
The ribbon brake sprina attached to the exit of the cartridge case, prevents slack in the ribbon and
keeps the ribbon tension at an appropriate level.
The ribbon mask prevents the ribbon from
brushing against the paper.
Ribbo
Ribbon
Figure 2-8. Ribbon Advance Gear Linkage
Spring
Rev.A
2-7

Epson LX-300 Specifications

General

Print Method	9-pin impact dot matrix
Interface	Parallel
Paper Handling	Friction feed, tractor feed
Weight	4.4 kg
Operating Environment	Temperature: 5 - 35°C, Humidity: 10 - 80%