Mita-Kyocera DF30 Service Manual SDF3002
Chapter 2 OPERATION THEORY
Contents
General 2
Basic operations 3
Outline 3
Outline of electrical circuits 3
Finisher driver input/output 5
Feed and drive systems 9
Outline 9
Face-down paper ejection 1 0
Normal stacking 10
Job offset 10
Stapling 11
Face-up paper ejection 12
Normal stacking 12
Feeding and ejection 13
Outline 13
Face-down feeder (inversion operations)/paper ejection operations 16
Face-up feeder, paper ejection operations 16
Job offset 16
Staple operations 18
Outline 18
First page operations 19
Second and subsequent page operations 21
Last page operations 22
Tray operations 23
Stapler unit 25
Tray loading volume detection 26
Stacking mode details 26
Jam detection 27
Power supply 30
Outline 30
Protection functions 30
OPERATION THEORY
General
2.1 General
This chapter provides explanations on the purpose, role and mechanical system of
each function, as well as providing an outline of the operational timing of each part
by function.
The descriptions of the digital circuits for this device include signals names without slashes (“/”) for H and PSNS electrical signal levels, and signal names with
slashes, such as L and /SCNON.
H and other signal names without slashes (“/”) are true (indicating that the signal
has been output) at the supply voltage level and false (indicating that the signal
has not been output) at the G ND leve l. L and other s ignal s name s wit h sla she s are
true at the ND level and false at the supply voltage level.
This device uses a microcomputer. However, as it is impossible to run an internal
operation check on a microcomputer, the explanation for the microcomputer operations has been omitted.
Also, as it is a pre-requisite for the internal printed circuit board to be untampered
with by the customer, simple summaries with the use of block diagrams have been
used in this manual to cover the descriptions of these printed circuit boards. Owing
to this, the explanations for circuits only cover the two areas from the sensors to
the input areas of the main substrates and from the output area of the main substrates to the load, and block diagrams are used to explain each function.
DF-30/DF-31
2-2
2.2 Basic operations
Outline
The finisher performs the face-down ejection and fa ce-up ejection of paper fed
through from the printer. The job offset and stapling functions are available with
face-down ejection.
These operations are controlled by the finisher driver’s circuit board.
OPERATION THEORY
Basic operations
Figure 2.1
Outline of the finisher
Outline of electrical circuits
The finisher’s operational sequence is controlled by the finisher driver’s circuit
board. A 16-bit microcomputer (CPU) is used in the finisher driver’s circuit board,
and this performed serial communications with the sequential control.
The finisher driver operates the solenoids and motors, etc., in accordance with the
various commands that are transmitted from the option controller via the serial
communications line. The finisher driver also notifi es the option controller of sensor and switch information via the serial communications line.
The major roles of the ICs mounted in the finisher driver are as follows.
Q1 (CPU). Sequential control.
•
Q2 (EP-ROM). Sequential programs built in.
•
Q3 (RAM). Used for backing up the initial data.
•
Q4 (IPC). Used for communications control.
•
The diagram below shows the signal flow between the finisher and the printer.
2-3
OPERATION THEORY
Basic operations
Figure 2.2
Signal flow between the finisher and the printer
DF-30/DF-31
2-4
Finisher driver input/output
OPERATION THEORY
Basic operations
Staple tray paper
detection sensor
Matching board
home position
detection sensor
Paper ejectio n
detection sensor
Base board
shelter solenoi d
Matching board
movement mo tor
Staple tray assembly
Finisher driver circuit board
"L" when the sensor
detects paper.
"L" when the sensor
detects the matchi n g
board’s home position.
"L" when the sensor
detects paper.
The base board is
sheltered when "L".
Control signals for
the matching board
movement mo tor
Paper ejection
motor clock
detection sensor
Paper ejection
motor
Pulse emitted in
accordance with the
revolution speed of
the ejection motor
Control signals for
the paper ejection motor
2-5
OPERATION THEORY
Basic operations
Frame assembly
Joint sensor
Tray elevation
motor clock
detection sensor
Distance sensor
Tray elevation
motor temperature sensor
Tray elevation
motor
Top cover open/
close detection
switch
Front cover open/
close detection
switch
Tray home position detection
sensor
"L" when connected to the
printer.
Pulse emitted in
accordance with
the revolution
speed of the tray
elevation motor .
Control signal for
the distance sensor
"L" when the
temperature of
the tray elevation
motor is high.
Control signals for
the tray elevation
motor.
"L" when the sensor detection the
tray’s home position.
Safety area
detection switch
Tra y uppe r limit
detection switch
Feeder motor
Control signal for
the feeder mot o r.
DF-30/DF-31
2-6
OPERATION THEORY
Basic operations
Swing guide
assembly detection sensor
Paddle drive solenoid
Swing guide
open/close detection switch
Swing guide
open/close detection switch
Shutter close
detection sensor
Shutter open
detection sensor
Swing guide assembly
Shutter guide assembly
Finisher driver circuit board
"L" when the
swing guide is
open.
Paddle revolves
when "L".
"H" when the
shutter is
closed.
"H" when the
shutter is closed
Stapler home
position detection sensor
Intermediate circuit board
Stapler move ment motor
Staple motor
Staple unit
"L" when the stapler’s home position is detected.
Liaision
board
Control signals for
the stapler movement motor.
Control signals
for the stapler
motor
2-7
OPERATION THEORY
Basic operations
Finisher driver circuit board
Inlet paper
detection sensor
Inversion paper
detection sensor
Inversion roller
drive solenoid
Face-up flapper
solenoid
Staple exchange
completion
switch
"L" when the sensor detects
paper.
"L" when the sensor detects
paper.
Inversion roller
revolved when
"L".
Paper fed face-up
when "L".
Staple exchange completion
switch circuit board
Staple operations
started when "H".
DF-30/DF-31
2-8
OPERATION THEORY
2.3 Feed and drive systems
Outline
This device stacks, shifts, staples and ejects paper to the tray in accordance with
the commands transmitted from the printer.
The four different methods of paper ejection are explained below.
Paper ejection methods
Face-down ejection
Feed and drive systems
Normal stacking
Job offset
Staple
One on the left-hand side
One on the right-hand side
Two in the center
Figure 2.3
Feed and drive sys tem
2-9
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