Canon GP405, Gp-335 Service Manual DADF-A1

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 MATTER.

ANY QUESTIONS REGARDING INFORMA TION CONTAINED HEREIN SHOULD BE DIRECTED TO THE COPIER SERVICE DEPARTMENT OF THE SALES COMPANY. THIS DOCUMENT ATION IS INTENDED FOR ALL SALES AREAS, AND MA Y CONTAIN INFORMATION NOT APPLICABLE TO CER TAIN 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, J apan

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

CHAPTER 1

GENERAL DESCRIPTION

I. FEATURES.................................. 1-1

II. SPECIFICATIONS ....................... 1-2

A. DADF-A1....................................1-2

III. NAMES OF PARTS ..................... 1-4

A. Exter nal View .............................1-4

B. Cross Section .............................1-4

IV. OPERATION ................................1-5

A. Original Set Indicator..................1-5

B. Warnings and Actions ................1-5

C. Routine Maintenance

by the User .................................1-6

CHAPTER 1 GENERAL DESCRIPITON

I. FEATURES

1. Two Types of Pick-Up Mode

Top pick-up: Pick-up starts with the top page. Bottom pick-up: Pick-up starts with the bottom page.

2. Stamp Marking

The machine can mark originals with a stamp to indicate that they have been processed for fax

transmission.

3. Original Size Identification

The machine can identify the size of an original in terms of its length (feeding direction) and

width for communication to its host copier.

1-1

CHAPTER 1 GENERAL DESCRIPITON

II. SPECIFICATIONS

A. DADF-A1

Item Original pick-up Original placement 1 Original placement 2

Original pick-up

Original type Original size

Original tray

Delivery tray

Original processing mode

Original size identification

Residual original detection

Continuous feeding Size mix

Communication with copier

Power supply Maximum power

consumption Weight

Dimensions (mm) Serial No.

Operating conditions Temperature Humidity

Specifications Circulating, auto duplexing pick-up method Face up Center reference Top pick-up

Bottom pick-up Sheet (50 to 105 g/m2), single-sided sheet,

double-sided sheet A5/STMT to A3/279×432 mm (11"×17") If small size, 50 sheets, 5.5 mm high max.

(A5, B5, B5R, A4, A4R, STMT, LTR, LTRR) If large size, 25 sheets (B4, A3, LGL,

279×432 mm (11"×17") If small size, 50 sheets (A5, B5, B5R, A4,

A4R, STMT, LTR, LTRR) If large size, 25 sheets (B4, A3, LGL,

279×432 mm (11"×17") Single-sided, double-sided, reduce image

composition Length (feeding direction) and width Possible in conjunction with the host copier.

Possible Possible Possible

IPC 2 24 VDC (from the host copier) 170 W or less

14.1 kg (approx.)

684 (W) × 527 (D) × 161 (H) AB ZLZ xxxxx

INCH/A ZNE xxxxx A ZNF xxxxx INCH/AB ZNG xxxxx

Same as the host copier.

Remarks

See p.2-17. No extra length original.

Paper of 80 g/m2 or less.

For fax processing only. Of the same width only. For fax processing only.

Not including the delivery tray.

1-2

The above specifications are subject to change for product improvement.

Table 1-201

CHAPTER 1 GENERAL DESCRIPITON

Note:

The following must not be used as originals:

• A transparency or paper with an opacity of 80% or less.

• A carbon-backed sheet.

• A sheet with paste-ups or binding.

• A sheet with a cut-off, hole, or tear.

• A sheet with a clip or glue.

• A sheet with curling, wrinkling, or creasing.

Caution:

Do not feed the same original more than 30 times to protect against damage.

1-3

CHAPTER 1 GENERAL DESCRIPITON

III. NAMES OF PARTS

A. External View

[1] [2] [3] [4] [5] [6] [7] [8]

Figure 1-301

[1] Upper cover [2] Side guide [3] Re-circulating guide [4] Original Set indicator [5] Original tray [6] Sub tray [7] Body cover [8] Original delivery tray

B. Cross Section

[1] [2] [3] [4] [5] [6] [7] [8] [9] [10]

[1] Delivery/reversing roller [2] Paper deflecting plate [3] Feeding roller [4] Separation belt [5] Separation flapper [6] Pre-separation guide

[16] [15] [14] [13] [12] [11]

Figure 1-302

[7] Delivery/pick-up roller [8] Paper retaining plate [9] Pick-up roller [10] Delivery roller [11] Feeding belt link roller [12] Retaining rolls

[13] Feeding belt [14] Paper stopper plate [15] Feeding belt drive roller [16] Registration roller

1-4

CHAPTER 1 GENERAL DESCRIPITON

IV. OPERATION

A. Original Set Indicator

The Original Set indicator turns on when an original is placed on the original tray, and flashes when an original jams.

A4/B5

A3/B4

Figure 1-401

Operation

1) If the original is B5R or larger or is A5 in

feeding length, open the original sub tray.

2) Set the side guide to suit the size of the

original.

B. Warnings and Actions

If the Original Set indicator flashes while an original is being fed, suspect a jam and perform the following:

1) Remove the originals from the original

tray.

2) Open the upper cover, and remove the jam.

Then, open the DADF to reset the

warning. (If any original is on the

copyboard glass, remove it.)

Caution:

If the jam is in the copier, the copier will run jam recovery mode and will automatically set the originals. Do not open the DADF to reset.

3) Set the originals in correct order, and set

the stack in the DADF.

Reference:

The side guide lock must be removed if the width of the original is larger than 297 mm (A4/A3). For details, see 3. “Side Guide Lock” on p. 3-3.

3) Place the originals with the first page on top.

4) As needed, set the appropriate copying mode on the copier.

5) Press the copier’s Copy Start key.

1-5

CHAPTER 1 GENERAL DESCRIPITON

C. Routine Maintenance by the User

Instruct the user to clean the following at least once a week:

1. Copyboard Glass

Wipe it with a cloth moistened with water or alcohol; then, dry-wipe it.

2. Feeding Belt

Wipe it with water or alcohol.

3. Other Parts

Clean all other parts of the DADF (if soiled) using a solution of mild detergent; then, dry-wipe

them to remove any residue.

4. Feeding Belt and Feeding Roller

Execute cleaning mode in the copier’s user mode.

5. Stamp

If markings start to be fuzzy, replace the stamp using tweezers.

Stamp

Tweezers

Figure 1-402

Caution:

Do not touch the stamp face. If your skin has come into contact with its ink, be sure to wash it with water immediately.

1-6

CHAPTER 2

BASIC OPERATION

I. BASIC CONSTRUCTION ............2-1

A. Outline of the Electrical

Circuitry ......................................2-1

B. Communication with the Copier .2-2 C. Inputs to the D ADF

Controller PCB ........................... 2-3

D. Outputs to the DADF Controller PCB

....................................................2-5

II. BASIC OPERATION .................... 2-6

A. Outline ........................................ 2-6

B. Operation .................................... 2-7

C. Detecting Originals ................... 2-12

D. Picking Up Originals ................ 2-17

E. Reversal ................................... 2-25

F. Reduced Page Composition .... 2-27

G. Delivery .................................... 2-34

H. Stamping Function ................... 2-40

I. Controlling the Pick-Up Motor ..2-43

J. Controlling the Belt Motor.........2-45

K. Detecting Original Jams ...........2-47

L. Improper Placement of

Originals ...................................2-50

III. POWRE SUPPLY ...................... 2-53

A. Outline ...................................... 2-53

CHAPTER 2 BASIC OPERATION

I. BASIC CONSTRUCTION

A. Outline of the Electrical Circuitry

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

DADF switch

MS1

MS2

S1

J203

J205

LED3

S3

S4

S5

S6

S7

J212

COM J2-3

+24V

+5V

RFC

EMPS

ENTS

CVRSW

DCTS

EJTS1

SPRS

UPCC1

-4

1-2

J5-7

J9-B10

-B9

-B12

J9-B6

J5-3

J9-A1

J9-A4

-A6

-A5

-A3

-A2

-1

-2

-B8

-B7

-B11

-8

-9

3

1 21

3 1 2

3

J207

J208

1 2

3 1

2

3 1

2

3 1

2

1 3

2

1 3

2

3 1

2

41

2

J3-

NO

COM NO

Upper cover switch

Original tray paper sensor

Registration paper sensor

Upper cover sensor

Pick-up roller sensor

Delivery sensor 1

Pick-up sensor

DADF controller PCB

When the RDF is open, '0'.

When the upper cover is open, '0'.

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.)

C. Inputs to the DADF Controller PCB

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

CHAPTER 2 BASIC OPERATION

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

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

CHAPTER 2 BASIC OPERATION

Stopper plate solenoid

Paper retaining plate solenoid

Paper deflecting plate solenoid

Stamp solenoid

Clutch

Brake

Pick-up motor

SL1

SL2

SL3

SL4

CL

BK

M1

2

1

2

1

2

1

J217

J216

J220

STPSL

WGTSL

FLPSL1

SMPSL

+24V

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

+24V

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

+24V

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

+24V

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

1

2

1

2

1

2

J5-10

-11

J5-12

-13

J9-B2

-B1

J14-9

-10

original.)

J13-1

-2 J6-1

-2

J12-1

-2

J11-1

+24V

CL

+24V

BK

See p. 2-43.

+24V

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

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

Feeder motor

Belt motor

Re-circulation motor

Delivery motor

M2

M3

J102-1

M4

-2

Display PCB

M5

J101 -5

LED101

LED102

J221

3

2

-6

J101-4

1

2

FMPWM

-2

J7-1

-2

J8-5

RSDRV

-6

J14-8

-7

-3

ORGLED

-4

EMPWM

-3

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

See p. 2-45.

+5V

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

+5V

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

+24V

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

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

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

Stopper plate solenoid drive signal

Paper holding solenoid drive signal

SL2

M1

Registration roller clock signal

Last original detection signal

Indicator

S14

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

Canon GP405, Gp-335 Service Manual DADF-A1

INTRODUCTION

CONTENTS

CHAPTER 1

I. FEATURES

II. SPECIFICATIONS

III. NAMES OF PARTS

IV. OPERATION

CHAPTER 2

I. BASIC CONSTRUCTION

II . BASIC OPERATION