Canon iR5870C, iR5870Ci, iR6870C, iR6870Ci side paper deck-u1 Service Manual
Service Manual
Paper Deck
Side Paper DeckU1
Mar 22 2004
Application
This manual has been issued by Canon Inc. for qualified persons to learn technical theory, installation, maintenance, and
repair of products. This manual covers all localities where the products are sold. For this reason, there may be
information in this manual that does not apply to your locality.
Corrections
This manual may contain technical inaccuracies or typographical errors due to improvements or changes in products.
When changes occur in applicable products or in the contents of this manual, Canon will release technical information
as the need arises. In the event of major changes in the contents of this manual over a long or short period, Canon will
issue a new edition of this manual.
The following paragraph does not apply to any countries where such provisions are inconsistent with local law.
Trademarks
The product names and company names used in this manual are the registered trademarks of the individual companies.
Copyright
This manual is copyrighted with all rights reserved. Under the copyright laws, this manual may not be copied,
reproduced or translated into another language, in whole or in part, without the written consent of Canon Inc.
COPYRIGHT © 2001 CANON INC.
Printed in Japan
Caution
Use of this manual should be strictly supervised to avoid disclosure of confidential information.
Symbols Used
This documentation uses the following symbols to indicate special information:
Symbol Description
Indicates an item of a nonspecific nature, possibly classified as Note, Caution, or Warning.
Indicates an item requiring care to avoid electric shocks.
Indicates an item requiring care to avoid combustion (fire).
Indicates an item prohibiting disassembly to avoid electric shocks or problems.
Introduction
Memo
REF.
Indicates an item requiring disconnection of the power plug from the electric outlet.
Indicates an item intended to provide notes assisting the understanding of the topic in question.
Indicates an item of reference assisting the understanding of the topic in question.
Provides a description of a service mode.
Provides a description of the nature of an error indication.
Introduction
The following rules apply throughout this Service Manual:
1. Each chapter contains sections explaining the purpose of specific functions and the relationship between electrical
and mechanical systems with reference to the timing of operation.
In the diagrams, represents the path of mechanical drive; where a signal name accompanies the symbol ,
the arrow indicates the direction of the electric signal.
The expression "turn on the power" means flipping on the power switch, closing the front door, and closing the
delivery unit door, which results in supplying the machine with power.
2. In the digital circuits, '1'is used to indicate that the voltage level of a given signal is "High", while '0' is used to
indicate "Low".(The voltage value, however, differs from circuit to circuit.) In addition, the asterisk (*) as in
"DRMD*" indicates that the DRMD signal goes on when '0'.
In practically all cases, the internal mechanisms of a microprocessor cannot be checked in the field. Therefore, the
operations of the microprocessors used in the machines are not discussed: they are explained in terms of from
sensors to the input of the DC controller PCB and from the output of the DC controller PCB to the loads.
The descriptions in this Service Manual are subject to change without notice for product improvement or other
purposes, and major changes will be communicated in the form of Service Information bulletins.
All service persons are expected to have a good understanding of the contents of this Service Manual and all relevant
Service Information bulletins and be able to identify and isolate faults in the machine."
Contents
Contents
Chapter 1 Specifications
1.1 Product Specifications....................................................................................................................................... 1 1
1.1.1Specifications .............................................................................................................................................. 1 1
1.2 Names of Parts................................................................................................................................................... 1 2
1.2.1Names of Parts............................................................................................................................................. 1 2
Chapter 2 Functions
2.1 Basic Construction ............................................................................................................................................2 1
2.1.1Inputs to the Side Paper Deck (1/2)............................................................................................................. 2 1
2.1.2Inputs to the Side Paper Deck (2/2)............................................................................................................. 2 2
2.1.3Outputs from the Side Paper Deck (1/1) ..................................................................................................... 2 3
2.2 Basic Operation................................................................................................................................................. 2 4
2.2.1Overview .....................................................................................................................................................2 4
2.2.2Pickup Operation......................................................................................................................................... 2 4
2.2.3Controlling the Deck Main Motor (M1D)...................................................................................................2 6
2.2.4Controlling the Deck Lifter Motor (M2D)..................................................................................................2 7
2.3 Paper Detection ................................................................................................................................................. 2 9
2.3.1Detecting the Presence/Absence of Paper...................................................................................................2 9
2.3.2Changing the Deck Paper Size..................................................................................................................2 10
2.3.3Detecting the Level of Paper..................................................................................................................... 2 10
2.4 Deck Lifter ......................................................................................................................................................2 11
2.4.1Detecting the Presence/Absence of Paper.................................................................................................2 11
2.5 Opening /Closing the Compartment................................................................................................................2 13
2.5.1Opening/Closing the Compartment...........................................................................................................2 13
2.6 Detecting Jams ................................................................................................................................................2 15
2.6.1Overview ...................................................................................................................................................2 15
2.7 Power Supply ..................................................................................................................................................2 16
2.7.1Route of power supply .............................................................................................................................. 2 16
Chapter 3 Parts Replacement Procedure
3.1 Removing from the Host Machine.................................................................................................................... 3 1
3.1.1 Compartment............................................................................................................................................... 3 1
3.1.2 Paper Deck .................................................................................................................................................. 3 2
3.2 External Covers................................................................................................................................................. 3 3
3.2.1 Front Cover ................................................................................................................................................. 3 3
3.2.2 Rear Cover .................................................................................................................................................. 3 4
3.2.3 Right Cover................................................................................................................................................. 3 4
3.2.4 Upper Cover................................................................................................................................................ 3 5
3.3 Drive System ..................................................................................................................................................... 3 6
3.3.1 Deck Pickup Clutch ....................................................................................................................................3 6
3.3.2 Deck Feed Clutch........................................................................................................................................3 7
3.3.3 Deck Main Motor........................................................................................................................................ 3 9
3.3.4 Deck Lifter Motor ..................................................................................................................................... 3 10
3.3.5 Lifter Cable (Front)................................................................................................................................... 3 13
3.3.6 Lifter Cable ...............................................................................................................................................3 15
Contents
3.4 Document Feeding System..............................................................................................................................3 18
3.4.1 Deck Pickup Unit ......................................................................................................................................3 18
3.4.2 Deck Pickup Roller ...................................................................................................................................3 19
3.4.3 Deck Pickup/Feed Roller ..........................................................................................................................3 22
3.4.4 Deck Separation Roller .............................................................................................................................3 24
3.4.4.1 Removing the Deck Separation Roller ..............................................................................................3 24
3.5 Electrical System .............................................................................................................................................3 25
3.5.1 Deck Driver PCB ......................................................................................................................................3 25
3.5.2 Open Switch PCB......................................................................................................................................3 25
Chapter 4 Maintenance
4.1 Maintenance and Inspection ..............................................................................................................................4 1
4.1.1 Periodically Replaced Parts.........................................................................................................................4 1
4.1.2 Durables ......................................................................................................................................................4 1
4.2 Adjustment.........................................................................................................................................................4 2
4.2.1 Basic Adjustment ........................................................................................................................................4 2
4.2.2 Adjustment at Time of Parts Replacement..................................................................................................4 4
Chapter 5 Service Mode
5.1 Outline ...............................................................................................................................................................5 1
5.1.1Alarm Code..................................................................................................................................................5 1
Chapter 6 Error Code
6.1 Overview............................................................................................................................................................6 1
6.1.1Error Code ...................................................................................................................................................6 1
Chapter 1 Specifications
Contents
Contents
1.1 Product Specifications....................................................................................................................................... 1 1
1.1.1 Specifications ............................................................................................................................................. 1 1
1.2 Names of Parts................................................................................................................................................... 1 2
1.2.1 Names of Parts............................................................................................................................................ 1 2
1.1 Product Specifications
Chapter 1
1.1.1 Specifications
T-1-1
Item Description
Method of pickup by separation roller
Method of paper accommodation by side tray
Type of copy paper plain power (64 to 105 g/m2)
A4, B5, LTR
recycled paper (64 to 80 g/m2)
A4, B5, LTR
eco paper (80 g/m2)
A4
heavy paper (106 to 209 g/m2)
A4,B5,LTR
0003-2538
Capacity 385 mm (approximate height of stack)
(about 3,500 sheets of 80 g/m2 or about 4,000 sheets of 64 g/m2)
Switchover of paper size by size guide plate in steps and in service mode (OPTION)
Dimensions (approx.) 326.2 (W) x 583 (D) x 574.5 (H) mm
Weight 46 kg (approx.)
Source of power DC from host machine
Operating environment same as host machine
Specifications are subject to change
for product improvement.
1-1
Chapter 1
1.2 Names of Parts
1.2.1 Names of Parts
External Covers
1 Deck release grip
2 Upper front cover
3 Compartment open/close switch
4 Front cover
5 Right cover
6 Upper cover
7 Rear cover
[1]
[2]
0003-2542
[7]
[6]
[3]
F-1-1
[4]
[5]
1-2
Chapter 2 Functions
Contents
Contents
2.1 Basic Construction ............................................................................................................................................2 1
2.1.1 Inputs to the Side Paper Deck (1/2)............................................................................................................ 2 1
2.1.2 Inputs to the Side Paper Deck (2/2)............................................................................................................ 2 2
2.1.3 Outputs from the Side Paper Deck (1/1) ....................................................................................................2 3
2.2 Basic Operation................................................................................................................................................. 2 4
2.2.1 Overview ....................................................................................................................................................2 4
2.2.2 Pickup Operation........................................................................................................................................ 2 4
2.2.3 Controlling the Deck Main Motor (M1D)..................................................................................................2 6
2.2.4 Controlling the Deck Lifter Motor (M2D)................................................................................................. 2 7
2.3 Paper Detection ................................................................................................................................................. 2 9
2.3.1 Detecting the Presence/Absence of Paper..................................................................................................2 9
2.3.2 Changing the Deck Paper Size................................................................................................................. 2 10
2.3.3 Detecting the Level of Paper.................................................................................................................... 2 10
2.4 Deck Lifter ......................................................................................................................................................2 11
2.4.1 Detecting the Presence/Absence of Paper................................................................................................2 11
2.5 Opening /Closing the Compartment................................................................................................................2 13
2.5.1 Opening/Closing the Compartment.......................................................................................................... 2 13
2.6 Detecting Jams ................................................................................................................................................2 15
2.6.1 Overview ..................................................................................................................................................2 15
2.7 Power Supply ..................................................................................................................................................2 16
2.7.1 Route of power supply ............................................................................................................................. 2 16
2.1 Basic Construction
Chapter 2
2.1.1 Inputs to the Side Paper Deck (1/2)
Deck pickup
sensor
Deck paper
absent sensor
Deck lifter upper
limit sensor
Deck lifter
position sensor
Deck set sensor
Deck feed sensor
Deck paper
supply position
Deck paper level
sensor
Deck open sensor
J10-1
PS101
PS102
PS103
PS104
J24-1
PS105
J12-1
PS106
J18-1
PS107
J19-1
PS108
J25-1
PS109
J5-1
J6-1
J7-1
J8-5
-2
-4
-3
-3
J4-4
-2
-3
-2
-3
-2
-3
-2
-3
-2
-3
-2
-3
-2
-3
-2
-3
J4-7
J4-10
J8-10
J17-3
J17-6
-3
-2
-6
-5
-9
-8
-9
-8
-2
-1
-5
-4
Side deck driver PCB
+5VR
J104-5
-4
DPPD
-3
+5VR
J103-7
-6
DPE*
-5
+5VR
J103-10
-9
DLUL
-8
+5VR
J103-13
-12
DLPD
-11
+5VR
J108-5
-4
DSET
-3
+5VR
J104-10
-9
DPFD
-8
+5VR
J107-3
-2
DPSP
-1
+5VR
J107-6
-5
DPLD
-4
+5VR
J108-8
-7
DOPND*
-6
When PS101 detects paper, '1'.
(When the light-blocking sensor is
at PS101.)
When paper is absent in the deck,
'0'.
(When the light-blocking sensor is
not at PS102.)
When the deck lifter is at the upper
limit, '1'.
(When the light-blocking sensor is
at PS103.)
When the lifter is at the pickup
position, '1'.
(When the light-blocking sensor is
at PS104.)
When the deck is set in the copier,
'1'.
(When the light-blocking sensor is
at PS105.)
When PS106 detects paper, '1'.
(When the light-blocking sensor is
at PS106.)
When the deck lifter is at the paper
supply position, '1'.
(When the light-blocking sensor is
at PS107.)
When PS108 detects the absence
of paper (level decreasing to half),
'1'.
(When the light-blocking sensor is
at PS108.)
When the compartment is set in
the deck, '1'.
(When the light-blocking sensor is
at PS109.)
0003-2548
F-2-1
2-1
Chapter 2
2.1.2 Inputs to the Side Paper Deck (2/2)
Deck open
switch
Deck open
indicator
Deck open
detecting switch
Deck lifter lower
limit detecting
switch
Power supply
SW100
LED100
Open switch PCB
SW101
NO
SW102
J21-1-2J20-1
NO
+24V
0VU
J2-1
J3-1
-2
-2
-3
-3
-4
-4
J26-1
-2
J17-8
-7
-3
Side deck driver PCB
J103-4
DOPN*
-3
+5VR
-2
-1
DOLON*
J109-3
DOPD*
-1
J107-8
DLLD
-7
J101-1
-2
When SW100 is pushed to open
the deck, '0'.
When the deck is open/closed,
'0'.
(The LED turns on or flashes
while the deck lifter motor is
rotating.)
When the deck is open, '0'.
(When SW101 is not pushed.)
When the deck lifter is at the
lower limit, '1'.
(When SW102 is not pushed.)
0003-2567
Copier
F-2-2
2-2
Chapter 2
2.1.3 Outputs from the Side Paper Deck (1/1)
J106-1
J105-5
J107-9
J104-6
J104-11
Deck main
motor
Deck lifter
motor
Deck feeding
clutch
Deck pickup
clutch
M101
M102
CL101
CL102
J15-1
J22-1
J11-1
J13-2
J14-2
-2
-2
-1
-2
-6
-5
-4
-3
-1
J17-9
-10
J8-6
-7
-11
-12
Side deck driver PCB
+24VU
-2
+5VR
-1
DBIT1
-2
DBIT0
-3
DMPLK
-4
DMON
-6
-10
24VU
-7
DPFCD*
24VU
-12
DPUCD*
0003-2579
See p. 10-14.
See p. 10-16.
When '0', CL101 turns on.
When '0', CL102 turns on.
Deck pickup
roller releasing
solenoid
Deck open
solenoid
SL101
SL102
J9-2
-1
J23-2
J8-1
-2
-1
J104-1
J108-1
-2
-2
24VU
DPRSD*
24VU
DOPSD*
When '0', SL101 turns on.
When '0', SL102 turns on.
F-2-3
2-3
Chapter 2
2.2 Basic Operation
2.2.1 Overview
The side paper deck (hereafter, "deck") is capable of accommodating as many as 3500 sheets of paper at a time (A4/
LTR/B5; 80 g/m2), ready to pick up and feed paper in response to control signals from its host machine' s DC
controller.
The lifter of the deck is driven by the deck lifter motor (M102), and the pickup operation is executed using the drive
from the deck main motor (M101).
2.2.2 Pickup Operation
The paper placed in the deck is held up by the lifter at a specific point of paper pickup.
When the Start key is pressed and the deck pickup clutch (CL102) goes on, the pickup roller starts to rotate by the
drive of the deck main motor (M101), thus picking up paper. At this time, the pickup/feed roller ad the separation
roller make sure that no more that a single sheet of paper is moved ahead. Thereafter, when the deck pickup sensor
(PS101) detects the paper, the deck pickup roller release solenoid (SL101) goes on so that the pickup roller leaves
the surface of the stack of paper.
0003-2610
0003-2616
2-4
Chapter 2
The deck feed roller starts to rotate when the deck feed clutch (CL101) goes on. The paper is then moved to the host
machine' s registration roller, where it is arched to remove any skew.
The registration roller serves to control the paper so that its leading edge will match the image on the photosensitive drum.
Deck feed paper detection
signal (DPFD)
Deck pickup detection signal
(DPPD)
PS106
PS101
DC controller PCB
Side deck driver PCB
Deck feeding clutch dive signal
(DPFCD*)
Deck pickup clutch drive signal
(DPUCD*)
CL101
CL102
(copier)
Deck pickup roller releasing
Deck main motor drive signal
M101
solenoid drive signal (DPRSD*)
SL101
Copy Start key
Deck main motor
(M101)
Deck pickup clutch
(CL102)
Deck pickup roller releasing
solenoid (SL101)
Deck pickup sensor
(PS101)
Deck feed sensor
(PS106)
Deck feeding clutch
(CL101)
F-2-5
ON
INTR
SCAN
F-2-4
PRINT
LSTR
STBY
2-5
Chapter 2
2.2.3 Controlling the Deck Main Motor (M1D)
0003-2623
1. Controlling the Deck Main Motor (M101)
The deck main motor is controlled by the host machine' s DC controller. The following diagram shows the circuit
used to drive the deck main motor, and the circuit has the following functions:
1 turns on/off the deck main motor
2 changes the speed of rotation of the deck main motor
a. Turning On/Off the Motor
When the deck main motor drive signal (DMON) from the host machine goes '1', the motor drive circuit goes on so
that the motor starts to rotate at a specific speed. When the deck main motor drive signal (DMON) goes '0' , on the
other hand, the motor drive circuit goes off to stop the motor.
The host machine' s DC controller monitors the rotation of the deck main motor with reference to the deck main
motor PULL lock signal (DMPLK); if the PULL lock signal remains '1' for 900 msec or more white DMON is '1', it
will indicate 'E043' on the host machine' s control panel.
Deck main motor
Deck main motor drive
DC
controller
PCB
Side
deck
driver
PCB
J105
signal (DMON)
-4
Deck main motor PLL
-3
lock signal (DMPLK)
Deck main motor speed
-2
switch signal (DBIT 0)
J14
-3
-4
-5
Motor
drive circuit
M101
Encoder
(copier)
Deck main motor driver PCB
F-2-6
b. Changing the Speed of Rotation of the Motor
The deck is designed to automatically change the speed of pickup so as to support future host machines. The pickup
speed is changed in response to external clock signals (MOTOR CLK) that are sent by the host machine' s DC
controller to the side deck drive PCB in keeping with the speed of motor rotation. The relationship between the speed
of motor rotation and the frequency of the external clock signals is as follows:
T-2-1
Drive speed Rotation of motor shaft External clock setting (Hz) Drive mode
Speed 1 2885.93 1443 used when picking up plain paper
Speed 2 2308.80 1155 used when picking up H/H color (PS)
Speed 3 1847.05 924 used when picking up heavy paper (1/3 PS)
MEMO
When making color copies/prints, the drive speed is shifted to speed 2 or 3.
2-6
Chapter 2
2.2.4 Controlling the Deck Lifter Motor (M2D)
2. Controlling the Deck Lifter Motor (M102)
The deck lifter motor control circuit is found as part of the side deck driver PCB. The following is a block diagram
of the circuit:
The combination circuit shown in the diagram consists of various logic circuits, and the deck lifter motor is rotated
in normal or reverse direction using combinations of the deck lifter drive signal (DLMON*) and the deck lifer ascent
signal (DLUP*) from the host machine' s DC controller and the output signals of various sensors.
If, for some reason, the deck lifter position sensor (PS104) does not detect the lifter within 60 sec after the deck lifter
ascent signal is generated, an error code (E041) will be indicated on the host machine' s control panel.
1 Conditions Used to Move Up the Lifter
the deck is joined with its host machine, i.e., the deck set signal (DSET) is '1'.
the deck (compartment) is closed, i.e., the deck open detection signal (DOPND*) is '1'.
the deck (compartment) is closed, i.e., the deck open detecting switch is 'on'.
the deck lifter upper limit signal (DLUL) is '0' and, in addition, the deck lifter position detecting signal (DLPD) is '0'.
the deck lifer motor drive signal (DLMON*) is '0'.
the deck lifter ascent signal (DLUP* is '0'.
In the presence of these conditions, the lifter starts to move up.
0003-2639
2-7
Chapter 2
2 Conditions Used to Move Down the Lifter
the deck (compartment) is open, i.e., the deck open detection signal (DOPND*) is '0'.
the deck lower limit detection signal (DLLD) is '0' and, in addition, the deck lifter position detection signal (DLPD)
is '0'.
the deck lifter motor drive signal (DLMON*) is '0'.
the deck lifter ascent signal (DLUP*) is '1'.
In the presence of these conditions, the lifter starts to move down.
Deck open
detection signal
(DOPD)
Deck lifter up drive signal
Deck lifter motor down signal
DC controller PCB
Deck lifter motor
drive signal
(DLMON*)
Communication conversion IC (Q17)
Deck lifter up
signal (DLUP*)
Deck paper supply position detection signal (DPSP)
Copier
Note: The communications conversion IC (Q17) in the diagram converts
serial signals to parallel signals and vice versa.
24V
24V
Motor drive circuit
Deck open signal
(DOPN*)
Deck lifter upper limit
detection signal
(DLUL)
Deck open detection
signal (DOPND*)
Deck lifter position
detection signal
(DLPD)
Combination circuit
Deck set signal
(DSET)
Deck lifter roller limit
detection signal
(DLLD)
Side deck driver PCB
24V
Deck open detecting
switch (SW101)
M102
Deck lifter
motor
Deck open
switch (SW100)
PS103
Deck lifter upper
limit sensor
PS109
Deck open
sensor
PS104
Deck lifter
position sensor
PS105
Deck set
sensor
Deck lifter lower limit
detecting switch (SW102)
PS107
Deck paper supply
position sensor
F-2-7
2-8
2.3 Paper Detection
Chapter 2
2.3.1 Detecting the Presence/Absence of Paper
0003-2817
1. Detecting the Presence/Absence of Paper
The presence/absence of paper inside the deck is checked by the deck paper sensor (PS102). When paper runs out
and the paper detecting lever of the pickup roller assembly leaves the deck paper sensor, the host machine indicates
the absence of paper on its control panel.
Paper detecting lever
Deck paper absent sensor
Copy paper
Lifter
F-2-8
Paper detecting lever
Deck paper absent sensor
F-2-9
Lifter
2-9
Chapter 2
2.3.2 Changing the Deck Paper Size
2. Changing the Deck Paper Size
To change the paper size of the deck, you must move the guide plate in the deck to suit the user' s needs and then
select the correct paper size in service mode: OPTION>ACC>DKP.
2.3.3 Detecting the Level of Paper
3. Detecting the Level of Paper in the Deck
The deck uses the deck paper supply position sensor (PS107), deck paper level sensor (PS108), and deck paper
sensor (PS102) to check the level of paper inside its compartment; the result of the check is indicated on the host
machine' s control panel. The following table shows how a check is made with reference to the states of the sensors:
T-2-2
paper level PS102 PS107 PS108
about 1750 to 3500 sheets 1 1 1
about 500 to 1750 sheets 1 1 0
0003-2666
0003-2669
1 to about 500 sheetssheets 1 0 0
no paper 0 0 0
1: the lightblocking plate is over the sensor.
0: the lightblocking plate is not over the sensor.
2-10
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