Ricoh PCU10, Service Training Manual

Page: 84 / 195

2.6.2 Transfer and separation mechanism
The transfer and separation corona unit is on the
transport unit.
The transfer entrance guide mylar at the transfer corona
inlet holds the paper against the photoconductor to
eliminate transfer blurring of the leading and trailing
edges of the copy.
Paper separates due to paper rigidity after the negative
charge is removed from the paper by the separation
corona. The OPC belt turns at a sharp angle and this
helps the paper to separate from the photoconductor.
The transfer is output at a constant current and
separation is output at a constant voltage from the
transfer/separation power pack.
Transfer output:
DC (--)140
±
2
µ
A. [(--)5.7KV]
Separation output:
AC200
±
5
µ
A, DC(+)25
±
5
µ
A. [AC6.3KV, DC(+)0.8KV]
2.6.3 Transport belt drive mechanism
The transport belts are driven by the main motor through
the vertical transport drive (see chart).
Paper
Separation corona wire
Tracking rollers
Guide mylar adjusting screw
Transfer
entrance
guide mylar
OPC
Separation corona wire
Antivibration ring
T/S corona
power pack
Transfer corona wire
Transfer
corona
Relay drive pulley
Main transport
drive belt
Main motor
Vertical transport
drive belt
Joint pulley
Transport belt
drive gear
Main motor
Main transport drive belt
Relay drive pulley
Joint pulley
(Vertical transport unit)
Vertical transport drive belt
Transport belt drive gear
Image Transfer and Paper Separation 1 July 1994
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