Epson DLQ-3000 Service Manual page 45

<Release Mechanism>
The mechanism is used to switch the paper feed mode by setting the release lever. This operation
switches the paper feed motor power transmission and paper feed rollers. The lever rotation is
converted into horizontal and vertical linear motion.
In the paper jam removal mode, all the paper feed rollers ,are released, making it is easy to remove
the jammed paper. At this time the release link lever links to the paper bail release operation.
The release sensor detects whether the release mechanism is set to friction or tractor mode. The
control circuit switches the paper feed sequence according to the sensor state indicating the release
mode.
Abnormal wear, teeth loss, or looseness of any gear causes bad power transmission to the tractor or
unstable paper feed pitch.
Table 2-15 summarizes the release mechanism for each mode, and Table 2-16 gives the release
sensor specifications.
Paper Bail Roller
Assembly
Carriage Guide Roller
Assembly
Tractor Transmission
Gear + Tractor Gear
Paper Supply Guide
Position
Release Sensor State
Table 2-16. Release Sensor Specifications
Type
Power Supply Voltage
Switch Mode
c.
Tractor Gear
Table 2-15. Release Mechanism Modes
Friction Mode
closed
Closed
Not engaged
Parallel to the rear
paper guide (top)
Open
Leaf Switch
Friction Mode: Open (OFF)
Tractor Mode: Closed (ON)
Release Mode: Closed (ON)
I
I
aper Guide
Figure 2-8. Release Mechanism
Tractor Mode
Gearing engaged
Parallel to the tractor
(middle)
Closed
I /
/
/
4
Release Link
Release Sensor
Lever
Operating Principles
Paper Jam
Removal Mode
Open
Open
Waiting Position
(bottom)
ROLLER ASSEMBLY,
UPPER
ROLLER ASSEMBLY,
2-13