Canon FY8-13FW-000DADF-A1, DADF-A1 Service Manual

DADF-A1

REVSION 0

DEC. 1998

FY8-13FW-000

IMPORTANT

THIS DOCUMENTATION IS PUBLISHED BY CANON INC., JAPAN, TO SERVE AS A SOURCE OF REFERENCE FOR WORK IN THE FIELD. SPECIFICATIONS AND OTHER INFORMATION CONTAINED HEREIN MAY VARY SLIGHTLY FROM ACTUAL MACHINE VALUES OR THOSE FOUND IN ADVERTISING AND OTHER PRINTED MA TTER.

ANY QUESTIONS REGARDING INFORMA TION CONTAINED HEREIN SHOULD BE DIRECTED TO THE COPIER SERVICE DEPARTMENT OF THE SALES COMPA NY. THIS DOCUMENT ATION IS INTENDED FOR ALL SALES AREAS , AND MA Y CONTAIN INFORMA TION NOT APPLICABLE T O CERTAIN AREAS.

Printed in Japan

Imprimé au Japon

Use of this manual should be strictly supervised to avoid disclosure of confidential information.

Prepared by

OFFICE IMAGING PRODUCTS TECHNICAL SUPPORT DEPARTMENT 1

OFFICE IMAGING PRODUCTS TECHNICAL SUPPORT DIVISION

CANON INC.

5-1, Hakusan, 7-chome, Toride-City , Ibaraki-Pref ., 302-8501, Japan

INTRODUCTION

This Service Manual provides information needed to service the DADF in the field. This Service

Manual consists of the following chapters:

Chapter 1 “General Description” introduces the DADF’s features and specifications, and

shows how to operate it.

Chapter 2 “Basic Operation” introduces the ADAF’s mechanical and electrical systems; it also

explains the principles used in these systems and the timing at which they are operated with reference to the ADAF’s electrical circuitry.

Chapter 3 “Mechanical System” explains the ADAF’s mechanical construction and how its

parts may be disassembled/assembled and adjusted.

Chapter 4 “Maintenance and Servicing” provides tables of periodically replaced parts and

consumables/durables and scheduled servicing charts.

Chapter 5 “Troubleshooting” provides tables of maintenance/inspection, standards/

adjustments, and problem identification (image fault/malfunction).

Appendix contains a general timing chart and general circuit diagrams.

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.

i

The machine’s electrical mechanisms are controlled by the DADF controller PCB. A microprocessor (CPU) is used on the DADF controller PCB, and the microprocessor reads the input signals from the sensors and the copier and generates signals used to drive DC loads (motors, solenoids) at such times as programmed in advance.

DADF controller PCB

Sensor

V ariable

resistor

CPU

(Q1)

ROM

(Q2)

RAM

(Q4)

Communication

IC(Q3)

24V

Power supply

5 VDC power supply

J2-1

circuit

5V

J1-6

Motor

Solenoid

Clutch

Brake

Indicator LED PCB

Motor

Copierk

Figure 2-101

2-1

CHAPTER 2 BASIC OPERATION

B. Communication with the Copier

The operation modes selected on the copier are communicated to the machine in an IPC communication method. Likewise, the operation states of the machine are communicated to the copier in an IPC communication.

If an error occurs in the IPC communication, the copier’s self diagnosis function turns on to indicate “E400” or “E712” on its control panel.

RSOUT

Communication

IC

RSIN

Communication

IC

CPUCPU

Copier DADF

Figure 2-102

2-2

C. Inputs to the DADF Controller PCB

1. Inputs to the DADF Controller PCB (1/2)

DADF switch

MS1

Upper cover switch

MS2

Original tray paper sensor

S1

COM J2-3 NO

COM NO

J203

-4

J31-2

J5-7

-8

-9

RFC

UPCC1

EMPS

CHAPTER 2 BASIC OPERATION

DADF controller PCB

+24V

When the RDF is open, '0'.

When the upper cover is open, '0'.

+5V

When an original blocks the sensor, '1'.

Registration paper sensor

Upper cover sensor

Pick-up roller sensor

Delivery sensor 1

LED3

S3

S4

S5

S6

-1

-2

+5V

ENTS

+5V

CVRSW

+5V

DCTS

+5V

EJTS1

When an original blocks the sensor, '1'.

When the upper cover is open, '0'. (The light-blocking plate is at the sensor.)

When the pick-u roller is at the home position, '1'. (The light-blocking plate is at the sensor.)

When an original is detected, '1'. (The light-blocking plate is at the sensor.)

J205

2

J212

2

3 1 2

J207

3

1

3

2

3 41

1 21

3 1

2

J9-B10

-B9

-B12

-B11

J9-B6

-B8

-B7

J5-3

J9-A1

-A3

-A2

Pick-up sensor

S7

J208

3

1

3

2

3 1

2

J9-A4

-A6

-A5

+5V

SPRS

When an original is detected, '1'. (The light-blocking plate is at the sensor.)

Figure 2-103

2-3

CHAPTER 2 BASIC OPERATION

2. Inputs to the DADF Controller PCB (2/2)

DADF controller PCB

Reversal sensor S8

Feeder motor

S9

clock sensor

Belt motor

S10

clock sensor

Registration roller

S11

clock sensor

Delivery sensor 2 S12

J209

3 1 2

1 2 3

3 1 2

1 3 2

J219

3 1 2

J9-A7

-A9

-A8

J9-A12

-A11

-A10

J9-B5

-B4

-B3

J5-4

-5

-6

J14-4

-6

-5

+5V

TURNS

+5V

FCLK

+5V

BCLK1

+5V

RCLK

+5V

EJTS2

When an original is detected, '1'. (When the light-blocking plate is at the sensor.)

While the feeder motor is rotating, alternates '1' and '0'.

When an original is detected, '1'. (When the light-blocking plate is at the sensor.)

Delivery motor clock sensor

Re-circulation sensor

Original width detecting VR

S13

Display PCB

S14

J219

1

3

2

3

1

J101-3

-2

-1

J218

3 2 1

J14-3

4

-2

5

-1

6

J8-3

-2

-1

1

J8-7

2

-8

3

-9

+5V

ECLK

+5V

RSS

+5V

WIDTH

While the delivery motor is rotating, alternates '1' and '0'.

When the re-circulation bar is set on the top original, '1'.

Detects the width of the original stacked on the original tray.

2-4

D. Outputs to the DADF Controller PCB

Stopper plate solenoid

When '0', the solenoid (SL1) turns on. (The stopper plate moves down.)

SL1

J217

1

2

J5-10

-11

+24V

STPSL

2

1

Paper retaining plate solenoid

When '0', the solenoid (SL2) turns on. (The paper retaining plate moves down.)

SL2

J216

1

2

J5-12

-13

+24V

WGTSL

2

1

Stamp solenoid

When '0', the solenoid (SL4) turns on. (The stamp puts a marking on the original.)

SL4

J220

1

2

J14-9

-10

+24V

SMPSL

Clutch

When '0', the clutch (CL1) turns on.

CL

J13-1

-2

+24V

CL

Brake

When '0', the brake (BK1) turns on.

BK

J6-1

-2

+24V

BK

Pick-up motor

See p. 2-43.

M1

J12-1

-2

Feeder motor

When '0', the feeder motor (M2) turns on.

M2

J11-1

-2

+24V

FMPWM

Belt motor

Delivery motor

See p. 2-45.

M3

J7-1

-2

When '0', the delivery motor (M5) turns on.

M5

J14-8

-7

+24V

EMPWM

Re-circulation motor

Display PCB

LED101

LED102

When '0', the re-circulation motor (M4) turns on.

M4

J8-5

-6

-3

-4

J102-1

-2

J101 -5

-6

-3

+5V

RSDRV

When '0', the Original Set indicator turns on.

+5V

ORGLED

2

1

2

3

2

J221

J101-4

Paper deflecting plate solenoid

When '0', the solenoid (SL3) turns on. (The paper deflecting plate operates.)

SL3

J9-B2

-B1

+24V

FLPSL1

1. Outputs to the DADF Controller PCB (1/1)

CHAPTER 2 BASIC OPERATION

2-5

CHAPTER 2 BASIC OPERATION

II . BASIC OPERATION

A. Outline

The machine uses four motors and one clutch to pick up, feed, and deliver originals.

The pick-up motor (M1) serves to pick up originals. The feeder motor (M2) serves to reverse and deliver originals. The belt motor (M3) moves and stops originals to and on the copyboard glass, and delivers them. The delivery motor (M3) operates to deliver originals to the delivery tray.

The clutch (CL) is used to engage or disengage the drive of the feeder motor (M2) and the belt motor (M3).

DADF controller PCB

Belt motor clock signal

Feeder belt brake drive signal

Belt motor drive signal

Clutch drive signal

Feeder motor clock signal

S9

S10

Delivery detection signal 1

Reversal/feeder paper detection signal

Feeder motor drive signal

M2

CL

Paper deflecting plate solenoid drive signal

SL3

S6

S8



BK M3

Pick-up registration signal

S7

S3

S11

Registration roller clock signal

Pick-up paper detection signal

S1

Original tray paper signal

Pick-up roller home position detection signal

Upper cover open/closed detection signal 2

S4

S5

SL1

Paper holding solenoid drive signal

SL2

Last original detection signal

Stopper plate solenoid drive signal

Indicator

S14

M1

Delivery motor clock signal

Original set indicator ON signal

Re-circulator motor drive signal

PCB

S13

Pick-up motor drive signal

M4

M5

S12

SL4

Delivery detection signal 2

Delivery motor drive signal

Stamp solenoid drive signal

2-6

Figure 2-201

CHAPTER 2 BASIC OPERATION

B. Operation

The machine enables the following six

operations:

1. Bottom pick-up

2. Double-sided original to single-sided copy

3. 2 small-size originals to reduced page composition

4. Single-sided original to double-sided copy

5. Double-sided original to double-sided copy

Using auto duplexing unit.

6. Top pick-up mode original feeding The machine feeds originals in any of the following five ways according to the instructions from the copier:

1. Bottom Pick-Up Mode

The machine picks up the originals on the original tray from the bottom (last page of the stack), and places each on the copyboard glass.

After copying, it moves the original from the copyboard glass to the original tray.

Original

Original tray

Original set

Pick-up 2

Copying

Delivery 1

Delivery 2

Figure 2-202

2-7

CHAPTER 2 BASIC OPERATION

2. Double-Sided Original Mode

When copying the face (1st side) and the back (2nd side) of an original, the machine

automatically reverses the original.

Pick-Up Operation

Picks up an original for the 1st side.

Reverses the original from the 1st side

to the 2nd side.

Scanner

Reverses the original from the 2nd side to the 1st side.

Copies the 2nd side.

Copies the 1st side.

2-8

Delivers the original.

Figure 2-203

CHAPTER 2 BASIC OPERATION

3. Reduced Page Compositon Mode

When reducing and copying two originals in page composition mode, the machine automatically picks up two originals and places them on the copyboard glass side by side. Table 2-201 shows the sizes of originals that may be used in the machine.

1st original

Picks up the 1st original.

A/B-configured

A5 B5 A4

Table 2-201

2nd original

INCH-configured

STMT

LTR

–

Reverses the original from the 1st side to the 2nd side.

Picks up the 2nd original

While reversing the 1st original, picks up the 2nd original. (At this time, the order of originals is switched.)

Feeds the 2nd original and the 1st original.

Copying

1st original

2nd original

Delivers the 1st original, and delivers the 2nd original.

Figure 2-204

2-9

CHAPTER 2 BASIC OPERATION

4. Top Pick-Up Feeding

The machine picks up the originals on the original tray from the top (first page of the stack), and places them on the copyboard glass.

Each time an original has been read, the machine moves the original from the copyboard glass to the original delivery tray.

Placement

Pick-up

Reading

Delivery 1

Delivery 2

2-10

Figure 2-205

CHAPTER 2 BASIC OPERATION

5. Recirculating Mode

If the copier is not equipped with a sorter, this mode enables sorting of copies. Originals are copied one after another until one set of copies have been made; and this operation is repeated until as many sets as desired have been made.

Operation

1) Set originals on the original tray.

2) Select sort mode on the copier.

3) Enter a number (of sets) on the copier’s keypad.

4) Press the Copy Start key.

2-11

CHAPTER 2 BASIC OPERATION

C. Detecting Originals

1. Outline

The machine has the following four types

of document detection:

1. Detects the presence/absence of an original on the original tray.

2. Detects the size of originals place on the original try.

3. Detects the number of originals that have been copied.

4. Detects the trailing edge of the last original.

2. Detecting the Presence/Absence of an Original

The presence/absence of an original on the

original tray is detected by the original tray paper sensor (PS1).

When an original is set on the original tray,

the light between the original tray paper sensor (S1) and the prism is blocked, causing the original tray paper sensor (S1) to generate the original detection signal (EMPS).

In response to the original detection signal

(EMPS), the DADF controller PCB turns on the Original Set indicator (LED101, LED102).

Original Set indicator

Original

Original tray

Figure 2-207

DADF controller PCB

LED 101,102

Prism

Original

S1

S11

Figure 2-206

Original Set

indicator ON

signal

Indicator

PCB

Original tray paper signal

2-12

CHAPTER 2 BASIC OPERATION

3. Detecting the Size of an Original

a. Outline

The machine detects the size of an original in relation to the vertical (feeding) and horizontal directions of the original, ensuring correct size detection and for use for the communication protocol of fax mode.

b. Detecting in Vertical (feeding)

Direction

Detection in vertical direction is made by the registration paper sensor (S3) and the registration roller clock sensor (S11).

The registration paper sensor detects the leading and trailing edges of an original, and the registration roller clock sensor detects the rotation of the registration roller while the original moves past the sensor. The rotation of the registration roller is converted to the length of the original.

DADF controller PCB

c. Detection in Horizontal Direction

Detection in horizontal direction is made by the original width detecting volume (VR) on the original tray. The original width detecting volume operates in conjunction with the side guide. As its resistance varies, the changes are detected by the DADF controller PCB, which converts them into a length in horizontal direction.

Side guides

VR

DADF controller PCB

Figure 2-209

Registration paper sensor

Registration roller

Pick-up detection signal

Registration roller clock signal

Registration roller clock sensor

Figure 2-208

2-13

CHAPTER 2 BASIC OPERATION

The copier identifies the size of an original in terms of a default size based on the results of vertical and horizontal lengths communicated by the machine.

Table 2-202 shows the default sizes that are identified:

d. A Model, A/B Model

Default

B5R

A5

A4R

FOOLSCAP

B5 B4

COMPUTER

paper

A4 A3

Vertical length

257mm

148.5mm 330mm 330mm 182mm 364mm

381mm 210mm

420mm

Original width

177~187mm

205~215mm

252~262mm

274~284mm

292~302mm

f. Inch Model and Inch/AB Model

Default

B5R

A5

A4R

STMT

LTRR

FOOLSCAP

LGL

B5 B4

LTR

COMPUTER

paper

279mm×432mm

(11"×17")

A4 A3

Original

length 257mm 148mm 297mm 140mm 279mm 330mm 356mm 182mm 364mm 216mm

381mm

432mm 210mm

420mm

Original

width

177~187mm 205~213mm

214~221mm

252~262mm

274~284mm

For vertical direction, a deviation of ±10 mm is ignored; for horizontal direction, a deviation of ±5 mm is ignored; outside the ranges, the original will be identified as being of a non-default size.

Table 2-202

e. Inch Model

Default

STMT LTRR

FOOLSCAP

LGL LTR

COMPUTER

paper

297mm×432mm

(11"×17")

Original

length 140mm 279mm 330mm 356mm 216mm

381mm

432mm

Original

width

211~221mm

274~284m

For original length, a deviation of ±10 mm is ignored; for original width, a deviation of ±5 mm is ignored; outside the ranges, the original will be identified as being of a non-default size.

Table 2-204

In vertical direction, a deviation of ±10 mm is ignored; in horizontal direction, a deviation of ±5 mm is ignored; outside the ranges, the original will be identified as being of a nondefault size.

Table 2-203

2-14

CHAPTER 2 BASIC OPERATION

4. Detecting the Number of Originals

The number of originals is detected in terms of “stack end detection,” “last original rear edge detection,” and “original count detection.”

a. Detecting the End of a Stack

The machine picks up and delivers originals on the same tray, requiring distinction of originals that have been copied from originals that have not been copied.

Before picking up originals, the recirculating lever is placed on top of the stack. The lever will drop on the original tray when all originals have been picked up, enabling the re-circulation sensor (S14) to identify the last original and to generate the last original detection signal (RSS).

DADF controller PCB

Recirculating lever

b. Detecting the Trailing Edge of the Last

Original

A copier with a long paper path (from the cassette to the drum) is designed to pick up copy paper early to speed up copying work. As such, when the machine picks up the last original and places it on the copyboard glass, the next paper is likely to be kept in wait.

To accommodate this, the machine is designed to pick up originals to suit the timing at which its host copier picks up copy paper.

If the length of an original is 220 mm or less, the machine sets the first original on the copyboard glass, and moves the second original beyond the registration roller.

Recirculating lever

DADF controller PCB

Re-circulating lever

Figure 2-210

Original

RSS

Re-circulation sensor (S14)

2nd original

Figure 2-211

If the re-circulating lever is on the original tray in this condition, the machine communicates to the copier that the third and subsequent originals are present, and the copier picks up copy paper for the next copying run.

When the re-circulating lever has dropped on the original tray, the machine communicates to the copier that there is not third or subsequent originals (RSS signal) so that the copier will not pick up copy paper.

2-15

CHAPTER 2 BASIC OPERATION

c. Original Count Detection

The machine need not count originals when making single-sided copies of singlesided originals, signal-sided originals of double-sided originals, or double-sided copies of double-sided originals; as such, it merely feeds the originals on the original tray in sequence.

When making double-sided copies of signal-sided originals, however, the machine must find out whether there is an odd or even number of originals.

Holding the copier from making copies, the DADF picks up and delivers the originals to find out how many there are.

Reference:

The machine can pick up the last page of originals first. When making doublesided copies of single-sided originals, it must decide whether the last page must be on the face or back of a sheet (odd or even page). Figure 2-212 shows what would happen if an odd number originals were fed without control. (The first page would be copied on the back of a sheet.)

1

2

3

1

2

3

Copier

Figure 2-212

On some copiers, you can disable original count operation in user mode.

2-16

Canon FY8-13FW-000DADF-A1, DADF-A1 Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

CONTENTS

I. FEATURES

II. SPECIFICATIONS

A. DADF-A1

III. NAMES OF PARTS

A. External View

B. Cross Section

IV. OPERATION

A. Original Set Indicator

B. Warnings and Actions

C. Routine Maintenance by the User

I. BASIC CONSTRUCTION

A. Outline of the Electrical Circuitry

B. Communication with the Copier

C. Inputs to the DADF Controller PCB

D. Outputs to the DADF Controller PCB

II . BASIC OPERATION

A. Outline

B. Operation

C. Detecting Originals