Read Sharp AL-840 (serv.man3) Service Manual online
(Paper release operation)
The lock lever arm is always pressed onto the paper release lever by
the spring. When the paper release lever is pulled toward you, the
lock lever arm is brought into contact with the lower frame so that the
paper pressure plate is fixed at the paper release position. Under this
condition, a clearance is provided between the paper feed roller and
the paper feed tray as shown in the figure below, and the paper is
released.
the spring. When the paper release lever is pulled toward you, the
lock lever arm is brought into contact with the lower frame so that the
paper pressure plate is fixed at the paper release position. Under this
condition, a clearance is provided between the paper feed roller and
the paper feed tray as shown in the figure below, and the paper is
released.
(Paper fixing operation)
When the paper release lever is pushed down, the paper release
lever arm pushes the lock lever arm in the direction of arrow (A).
lever arm pushes the lock lever arm in the direction of arrow (A).
By the above operation, the rotating disk is lifted and the paper is
pushed by the paper feed roller.
pushed by the paper feed roller.
If printing is made without pushing down the paper release lever, the
lock lever arm is pushed by the paper feed roller gear boss in the
direction of arrow (A) and the paper feed tray is pushed to fix the
paper.
lock lever arm is pushed by the paper feed roller gear boss in the
direction of arrow (A) and the paper feed tray is pushed to fix the
paper.
*
Paper feed roller, paper feed solenoid
The paper feed solenoid is used to turn ON/OFF the paper feed
clutch. When the paper feed solenoid is turned on, the paper feed
roller is rotated.
clutch. When the paper feed solenoid is turned on, the paper feed
roller is rotated.
The paper feed clutch is a spring clutch. The paper feed roller gear
rotation is transmitted to the paper feed roller only in the direction of
(A). That is, the paper feed roller is rotated only in the direction of (A)
(paper feed direction).
rotation is transmitted to the paper feed roller only in the direction of
(A). That is, the paper feed roller is rotated only in the direction of (A)
(paper feed direction).
Notch
Lower frame
Lock lever arm
Lock lever
Spring
Paper feed tray
Paper release lever
Paper feed roller
Paper feed clutch
Clearance
(A)
Paper release lever
Sub release lever
Lock lever arm
Paper feed roller gear
Paper plessure plate
Paper release lever
Paper feed clutch
Paper feed solenoid
Paper feed clutch
ON
A
Paper feed roller
paper feed clutch
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