By-Pass Tray; Composition; Mechanisms - Minolta Di850 Service Manual

BY-PASS TRAY

[1] Composition

By-pass feed roller
By-pass double feed prevention roller

[2] Mechanisms

Mechanism
*1 First paper feed
*2 Paper lift-up
Double feed prevention Torque limiter
No paper detection
*3 Paper size detection
*1 By-pass paper feed roller
To keep constant contact pressure on the paper
by the paper feed roller at the time of paper pick-
up, the weight of the paper feed roller itself is
used. The pick up solenoid (SD11) moves the
paper feed swivel plate down (when the roller is
rotating) so that the paper feed roller mounted on
the plate falls down to touch the paper as well.
Then, the paper feed roller picks up a paper and
feeds it toward the paper conveyance section.
The first paper feed solenoid moves the paper
feed swivel plate down only when paper is to be
fed. Otherwise, it releases contact.
By-pass paper feed roller
By-pass feed tray
Method
Swivel roller
Pick up solenoid
(SD11)
Paper up/down plate
Up/down motor
(M22) (by-pass tray)
Photosensor
Paper size detection
PS (PS55/PS56)
Pick up solenoid (SD11)
By-pass feed roller
*2 Paper lift-up
When paper is set in the bypass tray, the up/
down motor (by-pass) (M22) drives the paper up/
down plate via gears. Paper is automatically
pushed up to the paper feed position.
Paper up/down plate
*3 Paper size detection
The paper size is automatically detected by the
following three sensors:
• Lateral: Paper size detection VR (VR4)
• Longitudinal: Paper size PS 1/2 (PS55/PS56)
2-L-1
BY-PASS TRAY
Paper feed
swivel plate
Up/down motor
(by-pass) (M22)