Paper Supply And Eject Drive Section - Sony UP-D2500 Service Manual

PU gear pulley paper eject roller 3-609-372-01
3-609-399-01 separation gear 3-609-389-01
72TN15 belt P supply idler gear paper supply
3-686-322-01 3-609-388-02 roller
supply paper motr RF-500TB paper = sa
1-698-323-11 3-609-700-01
paper
3-173-567-02 SS
paper supply motor pull P limite gear
3-609-400-02
PU B gear paper separation roller 5-609-371-01
3-609-398-01 separation gear 3-609-389-01
PU A gear pick up roller 3-609-369-02
3-609-387-02 pick up gear 3-609-386-02
Paper supply and eject drive section is composed by paper supply motor block ass'y and paper
supply block ass'y.
The pick up roller sends the paper in the paper supply tray. In this stage, some papers are
conveyed. Next, when the papers are sent to between paper supply roller and separation roller, the
most upper paper is only conveyed to the platen block by paper supply roller. The papers later than
second paper are not advanced in this position. This is cause that the rotation of paper supply
motor is directly transmitted until paper supply motor but, it is transmitted to the separation roller
via P limiter gear ass'y.
When only the paper is supplied, the separation roller is pressed to the paper supply roller. When
there is one paper or nothing, gear B and A is slipped and separation roller is rotated correctly
since transmission drive power from paper supply roller to separation roller is stronger than drive
power from P limiter gear(torque limiter). But when more than two papers are put between paper
supply roller and separation roller, gears A and B of P limiter gear ass'y are rotated same direction
and the separation roller is rotated reversely since direct transmission drive power from paper
supply roller to separation roller becomes weak because the paper is slipped, the drive power from
P limiter gear becomes bigger. Such as this, when one piece, the paper is conveyed since the
separation roller is rotated correctly. When more than two pieces, most upper paper is conveyed
only and later two pieces are returned since the separation roller is rotated reversely.
Lastly, the printed paper is conveyed to the paper eject section by the paper eject roller.