Service manual

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EPSON LQ-300+ Revision C
Operating Principles Printer Mechanism 41
2.2.6 Release Mechanism
This mechanism switches the flow of PF motor driving forth between to the friction
feed and to the tractor feed.
Figure 2-6. Release Mechanism
Release mechanism consists of the following.

Release lever:Shifts tractor low speed gears back and forth.

Tractor gear

Paper advance reduction gear:Transfers the PF motor driving forth to the tractor
gear.

Release detector (REL): Detects the release lever position.
The table below shows the release detector specifications.
2.2.7 Other Special Functions
2.2.7.1 Energy saving mode
This function saves electric consumption when the printer is in the standby mode. This
mode turns hold current of PF motor, CR motor and CS motor OFF.
2.2.7.2 Quiet Mode
Quiet mode lowers printing temperature. When this mode is selected, carriage speed
will be lowered to the power down mode speed. Refer to Table 2-4, “Carriage Speed
Mode,” on page 35.
Compression spring
Printer mechanism
PF motor
Tractor gear
Release lever
Release detector
Plain
washer
Paper
advance
reduction
gear
Table 2-13. Release Detector Specifications
Item Specification
Method Mechanical contact method
Switching rate 0.6 to 1.0 mA, 5 VD±5%
Switching mode
• Friction: open
• Tractor: close