Canon NP7161 User Manual

SERVICE MANUAL

REVISION 0

AUG. 1998

FY8-13FB-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 INFORMATION CONTAINED HEREIN SHOULD BE DIRECTED TO THE COPIER SERVICE DEPARTMENT OF THE SALES COMPANY.

THIS DOCUMENTATION IS INTENDED FOR ALL SALES AREAS, AND MAY CONTAIN INFORMATION NOT APPLICABLE TO 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 DEPT. 1

OFFICE IMAGING PRODUCTS TECHNICAL SUPPORT DIV.

CANON INC.

5-1, Hakusan 7-chome, Toride-shi, Ibaraki 302-8501, Japan

INTRODUCTION

This Service Manual contains basic facts and figures on the NP7161/NP7160

needed to service the machine in the field.

This copier is designed to enable full automatic copying work, and comes with the

following systems accessories:

1. ADF-G1*

2. Staper Sorter-L1*

3. MS-C1*

4. Cassette Feeding Module-C1 * NP7161 only.

This Service Manual covers the copier only, and consists of the following chapters:

Chapter 1 General Description introduces the copier’s features and specifications,

shows how to operate the copier, and explains how copies are made.

Chapter 2 Basic Operation provides outlines of the copier's various mechanical

workings.

Chapter 3 Exposure System discusses the principles of operation used for the

copier's lens drive unit and scanner drive unit. It also explains the timing at which these drive units are operated, and shows how they may be disassembled/assembled and adjusted.

Chapter 4 Image Formation System discusses the principles of how images are

formed. It also explains the timing at which the various units involved in image formation are operated, and shows how they may be disassembled/ assembled and adjusted.

Chapter 5 Pick-Up/Feeding System explains the principles used from when copy

paper is picked up to when a copy is delivered in view of the functions of electrical and mechanical units and in relation to their timing of operation. It also shows how these units may be disassembled/assembled and adjusted.

Chapter 6 Fixing System explains the principles used to fuse toner images to transfer

media in view of the functions of electrical and mechanical units and in relation to their timing of operation. It also shows how these units may be disassembled/assembled and adjusted.

Chapter 7 Externals/Auxiliary Mechanisms shows the copier’s external parts, and

explains the principles used for the copier’s various control mechanisms in view of the functions of electrical and mechanical units and in relation to their timing of operation. It also shows how these units may be disassembled/assembled and adjusted.

Chapter 8 Installation introduces requirements for the site of installation, and shows

how the copier may be installed using step-by-step instructions.

Chapter 9 Maintenance and Servicing provides tables of periodically replaced parts

and consumables/durables and scheduled servicing charts.

Chapter 10 Troubleshooting provides tables of maintenance/inspection, standards/

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

Appendix contains a general timing chart and general circuit diagrams.

i

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 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.

ii

System Configuration

The copier is designed to accommodate the following accessories: *NP7161 only.

MS-C1*

Sorts and groups up to 10 sets of pages automatically.

Stapler Sorter-L1*

In addition to the functions of a 10-bin sorter, staples sorted pages automatically.

ADF-G1*

Feeds a stack of original pages to the copyboard page by page.

Control Card IV N

Controls volumes of copying work.

Cassette Feeding Module-C1

Provides an additional cassette.

iii

iv

CHAPTER 1

GENERAL DESCRIPTION

This chapter introduces the copier’s features and specifications, shows how to operate the copier, and explains how copies are made.

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

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

A. Copier ................................................. 1-2

III. NAMES OF PARTS.................................. 1-8

A. External View ..................................... 1-8

B. Cross Section ..................................... 1-9

IV. OPERATING THE MACHINE ................ 1-10

A. Control Panel.................................... 1-10

B. User Mode........................................ 1-12

V. ROUTINE MAINTENANCE

(BY THE USER) .................................... 1-14

VI. PONITS TO NOTE (BY THE USER) ..... 1-15

VII.IMAGE FORMATION ............................. 1-16

A. Outline .............................................. 1-16

CHAPTER 1 GENERAL DESCRIPTION

I. FEATURES

1. The copier is designed light in weight (about 42 kg), and compact in size (566 mm wide, 541mm deep).

2. The copier turns out as many as 16 copies each minute (A4/LTR).

3. The addition of the Cassette Feeding Module-C1 (accessory) enables a source of paper capable of holding a maximum of 1,050 sheets.

4. The density may be adjusted to 33 different shades, or in automatic mode (AE).

5. The use of a photo mode promises faithful reproduction of halftone.

6. The use of an auto power-off function promises power-saving operation.

1–1

CHAPTER 1 GENERAL DESCRIPTION

II. SPECIFICATIONS

A. Copier

1. Type

Body Copyboard Light source Lens Photosensitive material

2. Mechanisms

Copying Charging Exposure Copy density adjustment

Desktop Fixed Halogen lamp (120V:200W/230V:220W) Lens array OPC (30 dia.)

Indirect electrostatic Corona Slit (moving light source)

Auto or manual Development Auto

Pick-up

Manual Transfer Separation Cleaning Fixing

Dry (toner projection)

Front cassette (1 pc.)

2

Multifeeder (5 mm deep approx.; about 50 sheets of 80 g/m

paper) Corona Curvature + static eliminator Blade Heat roller (1000 W for 120V model; 1050 W for 230V model)

1–2

3. Performance

CHAPTER 1 GENERAL DESCRIPTION

Original type Maximum original size Direct Reduce I Reduce II Reduce III Reduce IV

Reproduction ratio

Enlarge I Enlarge II Enlarge III Enlarge IV Zoom Wait time

Sheet, book, 3-D object (2 kg max.) A3/279 × 432 mm (11"×17") 1:1.000 1:0.5000 1:0.707 1:0.0816 1:0.0865 1:1.154 1:1.224 1:1.414 1:2.000 1:0.500 to 2.000 (in 1% increments) 30 sec or less (at 20°C room temperature)

First copy Continuous copying Copy size Cassette

Copy paper type

Multifeeder

5.8 sec or less (A4, Direct, non-AE, cassette) 999 sheets max. A3/279×432 mm (11"×17") max. B5R/STMTR min.

2

• Plain paper (64 to 80 g/m

)

A3, B4, A4R, A4, B5R,B5, 279 × 432 mm (11"×17"), LTRR, LTR, LGL

• Colored paper (recommended by Canon) B4, A4

2

• Plain paper (64 to 80 g/m

) A3, B4, A4R, A4, B5R, B5, A5, 279X432 mm (11"×17"), LTRR, LTR,

LGL, STMTR

• Tracing paper (SM-1, GNT80) A3, B4, A4R, A4, B5R, B5, A5

• Transparency (recommended by Canon) A4/LTR

• Colored paper (recommended by Canon)* B4, A4

• Label paper (recommended by Canon) A4/LTR

2

• Heavy paper (up to 128 g/m

)

*May be used, but may not feed properly.

1–3

CHAPTER 1 GENERAL DESCRIPTION

Claws Cassette

Frame Copy tray

Leading edge Non-image width

Trailing edge Left/right Auto clear

Auto power-off

Auto pre-heat

Accessories

Used

2

55 mm deep (500 sheets of 80 g/m 100 sheets approx. (plain paper ; 64 to 80 g/m

paper; 250 sheets if B5)

2

)

Direct 2.0 ±1.0 mm Direct 2.5 ±1.5 mm Direct 2.5 ±2.0 mm Provided (2 min standard; may be changed between 1 and 9 min

in 1-min increments) Provided (30 min standard; may be changed between 10 and 90 min

in 10-min increments) Provided (15 min standard; may be changed between 15 and 90 min

in 15-min increments)

• ADF-G1*

• MS-C1*

• Control Card IV N

• Cassette Feeding Module-C1

• Stapler Sorter-L1*

• Remote Diagnostic Device II

*Applies to the NP7161 only.

1–4

4. Others

CHAPTER 1 GENERAL DESCRIPTION

Operating

Temperature Humidity

conditions

Atmospheric pressure

120V Power

120V (UL) source

127V 230V Maximum

Power Standby

consumption Continuous

Copying Noise

Standby

7.5° to 32.5°C/45.5° to 90.5°F 5% to 80% RH

810.6 to 1013.3 hPa (0.8 to 1.0 atm)

NP7160

NLB xxxxx

---NLC xxxxx PHQ xxxxx

NP7161

----

NLD xxxxx

----

PHS xxxxx

1.5 kW or less

0.135 kWh (approx.; reference only)

0.645 kWh (approx.; reference only) 66 dB or less (sound power level by ISO method)

40 dB or less (sound power level by ISO method) Ozone (8-hr average) Width Dimensions

Depth Height

Weight

Copy paper Consumables

Toner

Specifications subject to change without notice.

0.05 ppm or less

566 mm/22.3 in

541 mm/21.3 in

389 mm/15.3 in

NP7160

42 kg/92.6 lb (approx.)

NP7161

Keep wrapped, and avoid humidity.

Avoid direct sunlight, and store at 40°C, 85% or less.

1–5

CHAPTER 1 GENERAL DESCRIPTION

Reproduction mode Copy paper

A3 (297 × 420mm) A4 (210 × 297mm) B4 (257 × 364mm)

Direct

(100%)

B5 (182 × 257mm) A4R (297 × 210mm) B5R (257 × 182mm)

I

(70.7%)

Reduce

II

Size

A3 → A4R B4 → B5R B4 → A4R

A3 A4 B4

B5 A4R B5R A4R B5R A4R

(81.6%)

III

(86.5%)

I

A3 → B4 A4 → B5

A5R → A3

B4

B5

A3

(200%)

Copies/min

9 16 11 17 13 14 11 13 12

10 17

8

Enlarge

II

(141.4%)

III

(122.4%)

IV

(115.4%)

A4R → A3 B5R → B4 A4R → B4

B4 → A3 B5 → A4

A3 B4 B4

A3 A4

Specifications subject to change without notice.

8

9

8 11

1–6

CHAPTER 1 GENERAL DESCRIPTION

Reproduction mode Copy paper

11" × 17" (279 × 432mm)

LTR (297 × 216mm)

Direct

(100%)

LGL (216 × 356mm)

LTRR (216 × 297mm)

I

11" × 17" → LTRR

Size

11" × 17"

LTR

LGL LTRR LTRR

(64.7%)

Reduce

II

11" × 17" → LGL

LGL

(73.3%)

III

LGL → LTRR

LTRR

(78.6%)

I

STMTR → 11" × 17"

11" × 17"

(200%)

Enlarge

II

(129.4%)

LTRR → 11" × 17"

11" × 17"

Copies/min

9 16 11 13 12

11

12

8

III

(121.4%)

LGL → 11" × 17"

11" × 17"

Specifications subject to change without notice.

8

1–7

CHAPTER 1 GENERAL DESCRIPTION

III. NAMES OF PARTS

A. External View

[1] Control panel [2] Copyboard glass [3] Copyboard cover [4] Power switch

[1] [2]

[3]

[11]

[12]

[5] Upper right cover [6] Upper rear cover [7] Multifeeder [8] Waste toner box

[10]

[4]

[9]

[5]

[7]

[6]

[9] Right door [10] Right cover [11] Front door [12] Cassette

[8]

[1] Copy tray [2] Upper left cover [3] Upper delivery cover

Figure 1-301

[1] [2] [3] [4] [5]

[4] Lower delivery cover [5] Front fixing cover [6] Inside cover

[7] [8]

[6]

[9]

[7] Open/close lever [8] Lower inside cover [9] Static eliminator

1–8

Figure 1-302

CHAPTER 1 GENERAL DESCRIPTION

B. Cross Section

1. Copier

[1] [2] [3] [4] [5] [6] [10] [11] [13][7] [8] [9] [14][12] [15]

[1] No. 3 mirror [2] No. 2 mirror [3] Scanning lamp [4] No. 1 mirror [5] Copyboard glass [6] Lens [7] Pre-exposure lamp [8] Primary charging assembly [9] Blank exposure lamp [10] No. 6 mirror

[11] Dust-proofing glass [12] Developing cylinder [13] No. 4 mirror [14] No. 5 mirror [15] Multifeeder pick-up roller [16] Feed roller [17] Separation roller [18] Vertical path roller [19] Pick-up roller [20] Registration roller

Figure 1-303

[16][17][19][24][25][26] [20][21][22][23] [18]

[21] Transfer charging assembly [22] Separation static eliminator [23] Heat discharging roller [24] Lower fixing roller [25] Upper fixing roller [26] Delivery roller

1–9

CHAPTER 1 GENERAL DESCRIPTION

IV . OPERA TING THE MACHINE

A. Control Panel

[1]

[2] [3]

[4]

[5]

[6]

[7]

[9][8]

[1 1][10]

[12]

[15]

[16]

[17]

[18]

1[9]

[20]

[21]

[14][13]

Image Combination

Sort

Two-page Separation

Staple-

Sort

Group

[22]

Ref. Name

Sorter key*

[1]

Sorter indicator*

[2]

2-on-1*/Page

[3]

Separate key Fit Page key

[4]

Photo

Max. 200% A4/LTR A3 B5 B4 A4/LTR B4 B4 A3 B5 A4/LTR

A3 B4 A4/LTR B5 B4 A4/LTR A3 B5A4/LTR B4 Min. 50%

Reduce

123

1 : 1

Enlarge

Auto Paper A3/1117 A4/LTR A4/LTR B4/LGL B5 U1

R

B5 U2

Paper Select

Auto Zoom

R

Zoom

Fit Image

A

Reset

%

Additional Functions

Interrupt

2 31 5 64 8 97

ID

0 C

[23] [24][25] [26][27] [28]

Figure 1-401

Description Remarks

Press it to select or deselect Sort, Staple Sort, or Group Sort mode.

Indicates the selected delivery mode. It remains off in non-sort mode.

Press it to select or deselect 2-on-1 or Page Separate mode.

Press to select or deselect Fit Page mode. Use the mode to make a copy covering all image area of the original.

Energy Saver

Stop

Start

Clear

*Requires a sorter or stapler sorter.

*Requires an ADF.

ON/OFF

[5]

Photo key Reduce/Direct/

[6]

Enlarge key Default Ratio indicator

[7]

Control Card indicator

Jam indicator

[8]

Toner indicator

Paper indicator

Paper Source/Jam

[9]

* Applies to the NP7161 only

Press it to select or deselect Photo mode. Press it to select Reduce/Enlarge (default ratio) or

reset any ratio to Direct. Indicates the selected default reproduction ratio. Flashes when the control card is not set properly.

Flashes when a jam occurs. Flashes when toner is running out. It stops

flashing and remains on when toner runs out completely.

Flashes if paper runs out in the selected cassette or the manual feed tray (or, when the cassette is not set properly).

Indicates the selected cassette or the manual tray; flashes the location of a jam, if any. (It also flashes when a jam occurs in the ADF or when the sorter or the right door needs to be checked.)

Table 1-401

Requires a Control Card Unit.

1–10

CHAPTER 1 GENERAL DESCRIPTION

Ref. Name

Location indicator

[10]

Paper Size indicator

[11]

Paper Select key

[12]

Copy Count/Ratio

[13]

indicator Auto Ratio key*

[14]

[15]

% key

[16]

Reset key

[17]

Keypad

[18]

Start key

Description Remarks

Flashes when the waste toner box needs to be replaced. When the case becomes full, it stops flashing and remains on.

Indicates the size of the paper in the cassette selected by the Paper Select key.

Press it to select Auto Paper Select*, Cassette, or Manual Feed Tray mode.

Indicates the copy count/ratio and the selected user mode.

Use it to select or deselect Auto Ratio mode, in which the best reproduction ratio is automatically selected to suit the original and the selected paper.

Press it to indicate the selected reproduction ratio. Use it to reset the current copy mode to default. Use it to set a copy count or to enter a numeric value. Press it to start copying.

*Requires an ADF.

[19]

Stop key

[20]

Power Save key

[21]

Power switch Copy Density

[22]

lever AE key

[23]

Zoom key

[24]

[25]

User Mode key Interrupt key

[26]

ID key

[27]

Clear key

[28]

Press it to stop continuous copying. Press it to select or deselect power save mode. Press it to turn on or off the power. Slide it to adjust the copy density manually.

Press it to select or deselect AE (auto density adjustment) mode.

Press it to select a reproduction ratio (50% to 200%) in 1% increments. Hold it down to increase/decrease the ratio continuously.

Press it to set or change user mode settings. Press it to stop an ongoing copying run to make a

copy of a different original. Press it after entering an appropriate ID number.

Press it also after entering a number for ID registration.

Press it to reset the copy count to 1 or to clear any wrong input when making settings.

* Applies to the NP7161 only

Table 1-402

1–11

CHAPTER 1 GENERAL DESCRIPTION

B. User Mode

1. Outline

The copier provides user modes, which may be changed freely by the user. These modes

provide the functions shown in the following table.

Notation

U00

U01

U02

U03

U04

U05

Resetting user mode

Changing auto clear time

Changing auto power-save time

Changing auto power-off time

Fine-adjusting Zoom

Turning on/off auto cassette change

DescriptionItem

Use it to reset new settings made in user mode to default settings.

Use it to set the auto clear time length between 1 an 9 min in 1-min increments. Setting it to 0 disables the auto-clear function.

Use it to select an appropriate auto powersave time length: 10, 15, 20, 30, 40, 50, 60, or 90 min (8 lengths).

Use it to select an appropriate auto poweroff time length: 10, 15, 20, 30, 40, 50, 60, 90 (8 lengths).

Use it to adjust vertical and horizontal reproduction ratios over ±5 grades in 0.2% increments. Rang: -1.0% to +1.0% in units of 0.2%

Use it to turn on/off the auto cassette change function, in which copying is continued by switching cassettes when the selected cassette runs out of paper. O N : Enable auto cassette change. OFF : Disable auto cassette change.

Factory settings

(default)

–

2 min

15 min

30 min

±0.0%

ON

U06

U07

U08

1–12

Turning on/off auto sort

Turning on/off ADF jam recovery

Cleaning feeder

Use it to turn on/off the auto sort function, in which sorting takes place when making multiple copies of multiple originals using an ADF. O N : Enable auto sort. OFF : Disable auto sort.

Use it to turn on/off auto counting of originals in ADF jam recovery. O N : Enable auto count. OFF : Disable auto count.

Use it to clean the feeder (after placing paper in the ADF and pressing the Start key).

ON

OFF

–

Canon NP7161 User Manual

INTRODUCTION

CONTENTS

CHAPTER 1

I. FEATURES

II. SPECIFICATIONS

III. NAMES OF PARTS

IV . OPERA TING THE MACHINE