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Руководства для Canon NP-6317

Руководство пользователя (User manual)
Руководство по сервисному обслуживанию (Service manual)
Руководство по ремонту (Repair manual)
Перечень комплектующих (PartList)

Источник

CANON NP6317 REV.0 APR. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)

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 su-

pervised to avoid disclosure of confidential

information.

Prepared by

OFFICE IMAGING PRODUCTS TECHNICAL SUPPORT DEPARTMENT 3 OFFICE IMAGING PRODUCTS TECHNICAL SUPPORT DIVISION OFFICE IMAGING PRODUCTS QUALITY ASSURANCE CENTER

CANON INC.

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

CANON NP6317 REV.0 APR. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)

INTRODUCTION

This Service Manual contains basic data and figures for the Stapler Sorter-J1/K1/E3 needed to service the machine in the field.

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 operational 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 ahd 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 tranfer 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 Installtion 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 problems identification (image fault/malfunction).

Appendix contains diagrams showing electrical parts arrangement, tables of signals, tables of special tools, tables of solvents/oils, and a general timing chart.

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 from 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.

CANON NP6317 REV.0 APR. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)

CHAPTER 1 GENERAL DESCRIPTION

I.	FEATURES …………………………….	1-1	B.	Cross Section …………………..	1-6
II.	SPECIFICATIONS …………………..	1-2	IV. OPERATION …………………………..	1-8
	A.	Type …………………………………	1-2	A.	Control Panel…………………….	1-8
	B.	System …………………………….	1-2	B.	Daily Inspection to Be
	C.	Performance ……………………..	1-2		Performed by the User …….	1-10
	D.	Others………………………………	1-3	V. IMAGE FORMATION …………….	1-11
III. NAMES OF PARTS ………………….	1-5	A.	Outline …………………………..	1-11
	A.	External View ……………………	1-5

CHAPTER 2 BASIC OPERATION

I. BASIC OPERATION ………………..	2-1	D.	DC Controller Outputs ………..	2-6
A.	Functions ………………………….	2-1	E.	Basic Sequence of Operations
B. Outline of Electric Circuitry …	2-2		(Direct, Continuous Copying
C.	Inputs to DC Controller ………	2-4		(2 sheets)) ………………………..	2-9

CHAPTER 3 EXPOSURE SYSTEM

I. BASIC OPERATION ……………….	3-1	D. Scanner Movement for
A. Changing the Reproduction		Two-Page Separation Mode
Ratio ………………………………..	3-1	(copy count «2») …………………	3-7

II. LENS DRIVE SYSTEM …………….	3-2	IV.	No. 4/5 MIRROR DRIVE
A.	Outline ……………………………..	3-2		SYSTEM ………………………………..	3-8
B. Basic Lens Drive System		V.	DISASSEMBLY AND
	Operation (change of			ASSEMBLY ………………………….	3-11
	reproduction ratio) ……………..	3-3		A.	Lens Drive Assembly ………	3-11
III. SCANNER DRIVE SYSTEM …….	3-4		B.	Scanner Drive Assembly ….	3-14
A.	Outline ……………………………..	3-4		C.	Exposure Assembly ………..	3-17
B.	Relation Between Scanner			D.	Blank Assembly ………………	3-19
	Sensor and Signals ……………	3-5		E.	No. 4/5 Mirror Mount………..	3-20
C.	Basic Scanner Operation ……	3-6

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CHAPTER 4 IMAGE FORMATION SYSTEM

I.	PROCESSES ………………………….	4-1	B.	Operation …………………………	4-9
	A.	Outline ……………………………..	4-1	V. DOCUMENT DENSITY
	B. Basic Operation of Image		MEASUREMENT SYSTEM ……	4-11
		Formation System		A.	Outline …………………………..	4-11
		(black developing assembly,		B.	Operation ………………………	4-11
		2 copies) …………………………..	4-2	C. Reading the Output of the AE
II.	CONTROLLING THE SCANNING		Sensor …………………………..	4-12
	LAMP …………………………………….	4-3	D.	Adjustment …………………….	4-13
	A.	Outline ……………………………..	4-3	VI. DEVELOPING ASSEMBLY/
	B.	Mechanism ……………………….	4-4	DRUM CLAENER …………………	4-14
III. PRIMARY/TRANSFER		A.	Outlines …………………………	4-14
	CORONA CURRENT AND GRID		B.	Remaining Toner Sensor ….	4-14
	BIAS VOLTAGE CONTROL		C.	Torque Limiter…………………	4-15
	SYSTEM ………………………………..	4-5	VII. BLANKING …………………………..	4-16
	A.	Outline ……………………………..	4-5	A.	Outline …………………………..	4-16
	B.	Switching Primary/Transfer		B. Movement of the Blank
		Corona Current ON/OFF …….	4-5		Exposure Mechanism ……..	4-17
	C.	Maintaining Primary/Transfer		VIII.DISASSEMBLY AND
		Corona Current Constant ……	4-6	ASSEMBLY ………………………….	4-19
	D.	Controlling Grid Bias		A.	Main Motor Assembly………	4-19
		Voltage …………………………….	4-7	B.	Corona System ………………	4-20
IV. CONTROLLING DEVELOPING		C.	Primary/Transfer Corona
	BIAS ………………………………………	4-8		Assembly ……………………….	4-22
	A.	Outline ……………………………..	4-8	D.	Development System ………	4-25

CHAPTER 5 PICK-UP/FEEDING SYSTEM

I. PAPER PICK-UP ASSEMBLY AND	A.	Pick-up Assembly Delay
FEEDER…………………………………	5-1		Jam ………………………………….	5-8
A.	Outline ……………………………..	5-1	B.	Delivery Assembly Stationary
B.	Pick-up and Feeder			Jam ………………………………….	5-9
	Operation …………………………	5-3	C.	Delivery Assembly Delay
C. Identifying the Paper Size …..	5-4		Jam ……………………………….	5-10
D.	Pick-Up from the		III. FEEDER SYSTEM………………..	5-11
	Multifeeder………………………..	5-5	A.	Pick-up Assembly ……………	5-11
II. JAM DETECTION ……………………	5-7	B.	Feeder Assembly ……………	5-17

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CANON NP6317 REV.0 APR. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)

CHAPTER 6 FIXING SYSTEM

I. BASIC OPERATIONS ………………	6-1	III. DISASSEMBLY AND
A.	Outline ……………………………..	6-1	ASSEMBLY …………………………….	6-4
B.	Operation of Fixing Assembly		A. Fixing Assembly ………………..	6-4
	Temperature Control
	System …………………………….	6-3

CHAPTER 7 EXTERNALS/AUXILIARY MECHANISMS

I.	POWER SUPPLY …………………….	7-1	A.	External Covers …………………	7-4
	A. AC Driver DC Power		B.	Control Panel…………………….	7-7
	Supply ……………………………..	7-1	C.	Copyboard Cover ………………	7-9
II.	DISASSEMBLY AND		D.	Fans…………………………………	7-9
	ASSEMBLY …………………………….	7-3	E.	PCBs …………………………….	7-11

CHAPTER 8 INSTALLATION

I. LOCATION ……………………………..

8-1

II.UNPACKING AND INSTALLING

THE COPIER ………………………….	8-2
A.	Unpacking ………………………..	8-2
B.	Mounting the Drum ……………	8-4
C.	Checking the Operation ……..	8-5
D.	Adding Toner …………………….	8-6

E.	Checking the Image …………..	8-7
F.	Universal Cassette Code
	Setting «123» …………………….	8-8
III. RELOCATING THE COPIER …….	8-9
IV. INSTALLING THE CONTROL
CARD-V ………………………………	8-10

CHAPTER 9 MAINTENANCE AND SERVICING

I.	PERIODICALLY REPLACED		III. BASIC PROCEDURE FOR
	PARTS ……………………………………	9-1	PERIODIC SERVICING ……………	9-3
II.	DURABLE PARTS……………………	9-2	IV. PERIODIC SERVICING
			SCHEDULE ……………………………	9-4

CANON NP6317 REV.0 APR. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)

CHAPTER 10 TROUBLESHOOTING

I.	MAINTENANCE AND		V. TROUBLESHOOTING FEEDING
	INSPECTION ……………………….	10-1	PROBLEMS ……………………….	10-56
	A.	Basic Image Adjustment		A.	Paper Jams ………………….	10-56
		Procedure ………………………	10-1	VI. INCORRECT PAPER FEED
	B. Points to Check for Periodic	OPERATION ………………………	10-60
		Maintenance…………………..	10-2	VII. FUNCTION AND ARRANGEMENT
II.	STANDARDS AND		OF THE ELECTRICAL
	ADJUSTMENT ……………………..	10-3	PARTS ……………………………….	10-62
	A.	Mechanical …………………….	10-3	A.	Sensors, Fuses and
	B.	Electrical ………………………	10-17		Lamps………………………….	10-62
III.	IMAGE		B.	Clutches, Solenoids, Fans,
	TROUBLESHOOTING …………	10-21		Motors and Heaters ………	10-63
	A.	Initial Check ………………….	10-21	C.	Switches, Circuit Breakers,
	B.	Samples of Image			Counters, Etc. ………………	10-64
		Faults …………………………..	10-24	D.	PCBs …………………………..	10-65
	C.	Troubleshooting of Image		VIII.SERVICE MODE …………………	10-66
		Faults …………………………..	10-25	A.	Outline …………………………	10-66
IV. OPERATION		B. Using the Service Mode …	10-66
	TROUBLESHOOTING …………	10-37	C. Guide to Service Mode ….	10-67
	A.	Troubleshooting of		IX. SELF DIAGNOSIS ………………	10-69
		Malfunction …………………..	10-37

APPENDIX

A.	GENERAL TIMING CHART ……..	A-1	C. GENERAL CURCUIT
B.	LIST OF SIGNALS/		DIAGRAM ……………………………..	A-5
	ABBREVIATIONS …………………..	A-3	D. SOLVENTS AND OILS LIST…….	A-7

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CANON NP6317 REV.0 APR. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)

CHAPTER 1

GENERAL DESCRIPTION

I.	FEATURES …………………………….	1-1		B.	Cross Section …………………..	1-6
II.	SPECIFICATIONS …………………..	1-2	IV.	OPERATION …………………………..	1-8
	A.	Type …………………………………	1-2		A.	Control Panel…………………….	1-8
	B.	System …………………………….	1-2		B.	Daily Inspection to Be
	C.	Performance ……………………..	1-2			Performed by the User …….	1-10
	D.	Others………………………………	1-3	V.	IMAGE FORMATION …………….	1-11
III. NAMES OF PARTS ………………….	1-5		A.	Outline …………………………..	1-11
	A.	External View ……………………	1-5

CANON NP6317 REV.0 APR. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)

CHAPTER 1 GENERAL DESCRIPTION

I. FEATURES

1.Copies as large as A3 in size (DIRECT) may be made, and the copyboard is of a fixed type.

•Although compact in design, the copier enables making copies as large as A3 in size in the DIRECT mode.

•The copyboard is of a fixed type so that pages of a book may be copied with much ease.

2.Zooming between 50% and 200%.

•Copies may be made in reproduction rations of between 50% and 200%, selectable in 1% increments.

3.Front loading for faster supply of paper.

•Paper is loaded from the front of the copier so that the cassette* may be replenished with paper without wasting time. The design also saves space.

* Universal and its capacity is 500 sheets.

4.Single-component fine particle toner for high resolution.

•Images are developed using the single component toner projection method. Further, the copier uses toner of extremely fine particles for enhanced image quality.

5.Multifeeder (stack bypass) pick-up.

•As many as 50 copies (80 g/m 2) may be made continuously using the multifeeding mechanism.

6.Low warm-up time

•The copier warms up in than 25 sec.

CANON NP6317 REV.0 APR. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)

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CHAPTER 1 GENERAL DESCRIPTION

II.	SPECIFICATIONS
A.	Type

Body		Desktop
Copyboard		Fixed
Light sourse		Halogen lamp
Lens				Single lens + mirror movement
Photosensitive medium	OPC
B.	System

Reproduction		Indirect electrostatic method
Charging		Corona
Exposure		Slit (moving light source)
Copy density adjustment	Auto or manual
Development		Dry
Pick-up		Automatic	Exclusive cassette
			Manual	Multifeeder
Transfer		Corona
Separation		Curvature and Static eliminator
Drum cleaning		Blade
Fixing		Heat roller (900W)

C.Performance

Type of document		Sheet, Book, 3-D object (2 kg)
Document size		A3 max.
Wait time		25 sec (approx.; at 20°C)
First copy		9.4 sec (A4, AE ON/OFF, 1:1)
Continuous copying	99 copies
Type of copy		Cassette	A3 (max.), A6 (min.;148×105 mm)
paper		Multifeed tray	Plain paper (64 to 80 g/m2), Tracing paper, Colored paper
			Plain paper (64 to 128 g/m2), Tracing paper*, Colored paper,
			OHP film*, Label sheet

* Use of tracing paper may cause double feeding. If thin paper or OHP film, feed one sheet at a time.

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CANON NP6317 REV.0 APR. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)

		CHAPTER 1 GENERAL DESCRIPTION

Two-sided	Multifeed tray	Plain paper (64 to 128 g/m2), Colored paper
copying

Overlay	Multifeed tray	Plain paper (64 to 128 g/m2), Colored paper
copying

Cassette	Claw	Provided
	Standard	60 mm deep (about 500 sheets of 80 g/m2 paper)
	Universal	Yes
Copy tray		100 sheets (approx.; A4, 80 g/m2)
Non-image	Leading edge	2.0 ±1.5 mm or less
width (1st side)	Left/Right	2.5 ±1.5 mm or less
Auto clear		Provided (2 min, standard)
Auto shutoff		Yes
Option		ADF-A1, MS-A1, Stapler Sorter D3, CC-V

D.Others

Power supply		Serial Numbers
	230V 50Hz	UFW xxxxx
	230V 50Hz	QFE xxxxx
Power	Maximum	1.5kW or less
consumption

Noise	Copying	55 dB or less	(sound power level as prescribed by ISO)
	Standby	40 dB or less	0.05ppm or less (UL standards)
Ozone		0.05 ppm or less (UL standards)
Dimensions	Width	610 mm
	Depth	617 mm
	Height	416 mm
Weight		50 kg or less
Operating	Temperature	15.0° to 30°C
environment	Humidity	5% to 80%
	Atmospheric	0.6m to 1
	pressure

Others		Keep copy paper wrapped to protect against moisture.

CANON NP6317 REV.0 APR. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)

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CHAPTER 1 GENERAL DESCRIPTION

Reproduction mode	Paper size	Cassette	Copies/min
DIRECT		A3 (297x420mm)	A3	9
		A4 (210x297mm)	A4	17
		B4 (257x365mm)	B4	10
		B5 (182x257mm)	B5	17
		A5R (210x149mm)	A5R	16
REDUCE	I	50%
	II	A3 → A4	A4R	10
ENLARGE	I	A4 → A3	A3	9
	II	200%

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CHAPTER 1 GENERAL DESCRIPTION

III. NAMES OF PARTS

A.External View

Figure 1-301

[2] [3]

[4]

[1]

	[5]
[12]	[6]
[11]
[10]	[8]
[9]	[7]

Figure 1-302

[1]Copy tray

[2]Copyboard cover

[3]Control panel

[4]Cassette

[5]Front cover

[6]Delivery cover

[1]Copyboard glass

[2]Power indicator

[3]Power switch

[4]Right cover

[5]Multifeeder tray

[6]Developing assembly release lever

[7]Developing assembly

[8]Transfer/separation assembly

[9]Primary corona assembly cleaner

[10]Feeder assembly release lever

[11]Copy density knob

[12]Fixing assembly knob

CANON NP6317 REV.0 APR. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)

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CHAPTER 1 GENERAL DESCRIPTION

B.Cross Section

[1]

[2]

[3]

[4]

[5]

[6]

[7]

[8]

[9]

[10]

[11]

[12]

[13]

[24]

[23]

[22]

[21]

[20]

[19]

[18]

[17]

[16]

[15]

[14]

[1]

No. 3 mirror

[10] No. 6 mirror

[19] Photosensitive drum

[2]

No. 2 mirror

[11] No. 5 mirror

[20] Cassette

[3]

No. 1 mirror

[12] No. 4 mirror

[21] Feeder assembly

[4]

Scanning lamp

[13] Multifeeder tray

[22] Exhaust fan

[5] Copyboard glass

[14] Developing assembly

[23] Fixing assembly

[6]

Copyboard cover

[15] Feeder roller 1

[24] Delivery roller

[7]

Lens

[16]

Pick-up roller

[8]

Pre-exposure lamp

[17]

Registration roller

[9]

Primary corona

[18] Transfer corona

assembly

Figure 1-303

1-6

CANON NP6317 REV.0 APR. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)

CHAPTER 1 GENERAL DESCRIPTION

Blank Page

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CHAPTER 1 GENERAL DESCRIPTION

IV. OPERATION

A.Control Panel

[1]

[2]

[3] [4][5] [6]

[7]

[8]

[9]

[10]

[22] [21] [20] [17] [16] [15] [14] [13] [12] [11] [19]

[18]

Figure 1-401

1-8

CANON NP6317 REV.0 APR. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)

		CHAPTER 1 GENERAL DESCRIPTION

No.	Name	Description
[1]	Sort/Group key	Press to select or cancel the Sort or Group mode.
		* To use the Sort or Group mode, your copier must be
		equipped with the optional Sorter or Stapler Sorter.

[2]	Two-Page Separation key	Press to select or cancel the Two-Page Separation mode.
[3]	Paper Jam indicator	Flashes when a paper jam occurs.
[4]	Control Card Check indicator	Flashes when the Control Card is not fully inserted.
[5]	Paper Out indicator	Flashes when there is no paper in the selected paper sup-
		ply (paper cassette or stack bypass).

[6]	Toner Out indicator	Flashes when toner needs to be added.
[7]	Copy quantity/Copy ratio display	Displays the number of copies to be made, and the se-
		lected enlargement/reduction ratio.
		Also, when the copier is not functioning properly, the Ser-
		vice Call message will appear here.

[8]	Reset key	Press to return the copier to the Standard mode.
[9]	Start key	Press to begin copying.
[10]	Stop key	Press to stop the copier before copying is complete.
[11]	Clear key	Press to change the number of copies to be made to one.
[12]	Number keys	Press to input the number of copies to be made.
[13]	Percent key	Press to display the selected enlargement/reduction ratio.
[14]	Zoom keys	Press to reduce or enlarge copy images by any ratio from
		50% to 200%, selectable in 1% increments.

[15]	Autom. Zoom key	Press to select or cancel Automatic Zoom.
		* To use Automatic Zoom, your copier must be equipped
		with the optional Automatic Document Feeder (ADF).
		When copying using the stack bypass or a universal cas-
		sette, you cannot use Automatic Zoom.

[16]	Paper Select key	Press to select the paper supply (paper cassette or stack
		bypass).

[17]	Paper Supply/Jam Location indica-	Lights to show the selected paper supply (paper cassette
	tor	or stack bypass).
		If a paper jam occurs, flashes to show jam location.
		* This indicator will also flash to inform the user of vari-
		ous errors.

[18]	Enlarge key	Press to enlarge copy images using a fixed enlargement
		ratio.

[19]	1:1 (Direct) Copy key	Press to make copies the same size as the original.
[20]	Reduce key	Press to reduce copy images using a fixed reduction ratio.
[21]	AE (Automatic Exposure) key	Press to select or cancel Automatic Exposure Control.
[22]	Exposure lever	Use to manually adjust the lightness/darkness of copies.

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CHAPTER 1 GENERAL DESCRIPTION

B.Daily Inspection to Be Performed by the User

Carefully instruct the user to be sure to clean the following parts of the copier once a week.

1.Primary Corona Assembly

Slide in and out the wire cleaner to clean the corona wires.

2.Copyboard Glass

Clean the copyboard glass with a moist cloth; then, wipe it dry.

3.Copyboard Cover

Clean the copyboard cover with a mild detergent solution; then, wipe it dry.

4.Transfer Corona Assembly

Remove the transfer corona assembly from the copier; then, slide the knob (wire cleaner) at the bottom of the transfer corona assembly back and forth to clean the corona wires.

Further, clean the static eliminator using the cleaning brush (accessory).

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CHAPTER 1 GENERAL DESCRIPTION

V. IMAGE FORMATION

A.Outline

Copyboard glass
		Scanning lamp
		Lens
		Primary corona assembly		Developing
			assembly
		Pre-exposure lamp
Cleaning roller	Drum cleaner				Picture to	be changed
	+			+		(1 register	station only)
+		+
+		+	+
Upper fixing roller
+
			+	+
+
	+	Transfer	corona	assembly
	+
	Static	charge		+

		eliminator			+

	Upper	fixing roller

Figure 1-501

This copier consists of the units shown in Figure 1-501.

The image forming process is divided into the eight steps shown below. Step 1: Pre-exposure

Step 2: Primary corona (negative DC) Step 3: Image exposure

Step 4: Developing (positive plus AC) Step 5: Transfer (negative DC)

Step 6: Separation Step 7: Fixing

Step 8: Drum cleaning

	Electrostatic latent image formation block
	2. Primary corona	3. Image exposure
1. Pre-exposure	4. Developing
8. Drum	cleaning
		5. Transfer	Multifeeder
Copy delivery	6. Separation	Registration
	7. Fixing	Cassette
		Flow of	copy paper
		Direction	of rotation of drum

Figure 1-502

CANON NP6317 REV.0 APR. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)

1-11

CHAPTER 2

BASIC OPERATION

In outline diagrams, represents mechanical drive paths, and indicates electrical signal paths.

Signals in digital circuits are identified as ‘1’ for High and ‘0’ for Low. The voltage of signals, however, depends on the circuit.

Nearly all operations of the product are controlled by a microprocessor; the internal workings of the processor are not relevant to the serviceman’s work and, therefore, are left out of the discussions. By the same token, no repairs are prescribed for the PCBs at the user’s premises; for this reason, PCBs are discussed by means of block diagrams rather than circuit diagrams.

For the purpose of explanation, discussions are divided into the following: from sensors to DC controller PCB input ports; from DC controller output ports to loads; and minor control circuits and functions.

I. BASIC OPERATION ………………..	2-1	D.	DC Controller Outputs ………..	2-6
A.	Functions ………………………….	2-1	E.	Basic Sequence of Operations
B. Outline of Electric Circuitry …	2-2		(Direct, Continuous Copying
C.	Inputs to DC Controller ………	2-4		(2 sheets)) ………………………..	2-9

CANON NP6317 REV.0 APR. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)

CHAPTER 2 BASIC OPERATION

I. BASIC OPERATION

A.Functions

The copier can be divided into four functional sections: paper pick-up and feed system, exposure system, image formation system, and control system.

Control	system
Control	panel
Control		circuit

Exposure system
Copybord
Scanner
Optical
system	tormation
Image
system
Pnimary corona

	Cleaning unit	Photosensi-
	Developing
	tive drum

		assembly

				Transfer and		Multifeeder
				separation

				assembly	Pick-up	assembly
Paper	delivery			Feeder	control

			assembly
tray	Copy	delivery

	Fixing	assembly
	assembly

Cassette

Paper pick-up and feed system

Figure 2-101

CANON NP6317 REV.0 APR. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)

2-1

CHAPTER 2 BASIC OPERATION

B.Outline of Electric Circuitry

The NP-6317’s main mechanisms are controlled by the microprocessor, PROM, and EEPROM on the DC controller PCB.

1.Microprocessor (Q300)

•controls the copying sequence

•controls the control panel

•controls the main motor/scanner motor/mirror motor

•controls the scanning lamp/fuser lamp

•reads the analog signals

2.PROM (Q301)

•contains the sequence program

3.EEPROM (Q317)

•stores data that can be modified in the service mode (replaces conventional variable resistors and switches)

Note:

EEPROM is a type of ROM in which data may be erased or stored newly.

For this reason, the NP-6317’s RAM and RAM are not backed up by a lithium battery.

Note:

The NP-6317 is equipped with an A/D converter and, therefore, its microprocessor can read analog signals.

Note:

The main motor (M1) is a brushless motor.

The scanner motor (M2) and mirror motor (M3) are stepping motors which use the oscillation frequency of the crystal oscillator on the DC controller.

2-2

CANON NP6317 REV.0 APR. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)

CHAPTER 2 BASIC OPERATION

Scanner home position sensor Lens home position sendor Cassette paper sensor Delivery paper sensor Pre-registration paper sensor Multifeeder paper densor Mirror home position sensor

Cassette size sensor

Right door switch

AE sensor

Black toner level sensor

Conntrol panel

Thermistors

Sensors, Switches

DC controller PCB

Microprocenssor (Q300)

PROM (Q301)

EEPROM (Q317)

Driver (Q324)

Microprocessor

Sorter controller PCB

Microprocessor

ADF controller PCB

Figure 2-102

<Loads>

		Main motor


AC driver/DC		Fixing roller heater
power supply	PCB

HVT

Registration roller clutch

Lens solenoid

Pick-up clutch solenoid

Blank solenoid

Multifeeder solenoid

Primary/Transfer corona assembly

Developing bias

GND bias

Lamp regulator			Scanning lamp

Scanner motor

Mirror motor

Pre-exposure lamp

Exhaust fan

Scanner cooling fan

Sorter

ADF

CANON NP6317 REV.0 APR. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)

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CHAPTER 2 BASIC OPERATION

C.Inputs to DC Controller

1.Inputs to DC Controller (1/2)

Multifeeder paper sensor

Pre-registration paper sensor

Right door sensor

Mirror home position sensor

Scanner home position sensor

Lens home position sensor

Cassette paper sensor

Delivery paper sensor

				DC controller PCB
J24-1	J311-5	5V

-2	-4		when	paper is over	Q1, «1»
MFPD	(light-blocking	plate	is	at	Q1)

-3	-3
J23-1	J304-9	5V

-2	-8		when	paper is at Q2, «1»
PRP	(light-blocking	plate	is	at	Q2)

-3	-7
J27-1	J311-8	5V
	when	night door is	closed, «1»
-2	-7
RDC	(light-blocking	plate	is	at	Q3)

-3	-6
J801-1	J312-3	5V

-2	-2		when	mirror motor	is	at	home	position, «1»
MHP	(light-blocking	plate	is	at	Q4)

-3	-1
J35-1	J312-6	5V

-2	-5		when	scanner	is at	home position, «1»
SCHP	(light-blocking	plate	is	at	Q5)

-3	-4
J33-1	J312-9	5V

-2	-8		when	lens is at home	position, «1»
LHP	(light-blocking	plate	is	at	Q6)

-3	-7
J26-1	J303-7	5V

-2	-6		when	paper is in cassette, «1»
CPEP	(light-blocking	plate	is	at	Q7)

-3	-5
J44-1	J314-5	5V

-3	-3		when	paper is at Q8, «0»
DLP	(light-blocking	plate	is	not at Q8)

-2	-4
	Figure 2-103

2-4

CANON NP6317 REV.0 APR. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)

CHAPTER 2 BASIC OPERATION

2.Inputs to DC Controller (2/2)

AE sensor

Black toner leveol sensor

Thermistor 2 (auxiliary)

Thermistor 1 (main)

Cassette size sensor

DC controller PCB

24V

J701-4

J312-13

24V

-2

-11

—

See p. 3-25

-1

-10

AEGIN

-3

-12

TS1

J39-3

J303-3

-2

BTEP

-1

J45-1

J317-1

TH2

TH2 (NTC2)

-2

TH1(NTC1)

The voltage lowers as the fixing

-4

J317-4

TH1

heater

temperature

rises.

-3

CST(SW3)

J28-3

J313-2

CSZ1

-4

-3

CSZ2

-5

-4

CSZ3

Reads

the cassette

size; see p. 3-32.

-6

-5

CSZ4

-2

-1

oscillation

signal

Figure 2-104

CANON NP6317 REV.0 APR. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)

2-5

CHAPTER 2 BASIC OPERATION

D.DC Controller Outputs

1.DC Controller Out Puts (1/3)

Noise

filter DS1

SW1

Control panel PCB

24V

J509-1

DC controller PCB

		Power supply
			assembly	J316-11	PWOFF	when «0»	AC power OFF (main

			24V
									switch).
			K100
					J318-3	HTPT		when «0»	AC power OFF (power

										supply unit).
Fixing roller heater		Fixing heater		-2	HTCK		when «0»	fixing roller heater ON.
	ON detection
J4-1
		circuit
LA1			Fixing
	-2			-1
	heater drive		HTRD		when «1»	fixing roller heater ON.
F1
		circuit
Thermoswitch 1
	J201-1		J203	J305	24V
		-1	-6
Scanning lamp	F2	-2		-4	-3	LAMP-CHECK
		-5	-2

	J202-3	Lamp driver unit	ZERO-CROSS	See p. 3-20.
LA2	Thermoswitch 2	-1	-3	-4
	LIGHT

				-2	-5
				-6	-1	LAMP-SHIFT
Scanner motor	M2					See	p. 3-9.
Mirror motor	M3					See	p. 3-9.
	J351-1				J301-1	MMLOCK	when «0»	main motor is moving.
	-2				-2	MMD		when «1»	main motor ON.
Main motor	M1
-3				-3

	-4				-4	+24V
			Figure 2-105

2-6

CANON NP6317 REV.0 APR. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)

CHAPTER 2 BASIC OPERATION

2.DC Controller Outputs (2/3)

DC controller PCB

Pick-up clutch	solenoid	24V
				J307-5

	SL1		-6	PUSD


Lens	drive	solenoid	24V
				J309-1

	SL2		-2	LNSD


Multifeeder	solenoid	24V
				J311-9

	SL3		-10	MFSD


Blank	solenoid			24V
				J307-7

	SL4		-8	BLSD


Registration	roller	clutch	24V
				J307-3

	CL1			-4	RGCD


				Figure 2-106

when «0», SL1 ON.

when «0», SL2 ON.

when «0», SL3 ON.

when «0», SL4 ON.

when «0», CL1 ON.

CANON NP6317 REV.0 APR. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)

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CHAPTER 2 BASIC OPERATION

3.DC Controller Outputs (3/3)

DC controller PCB

					J309-1	24V

Scanner cooling fan	FM1			-2	FM1D


					J311-1	24V

Exhaust fan	FM2			-3	FM2D


	Pre-exposure lamps	J731	J307	24V
				-2	-1

				-1	-2	PEXP

					J314-2	24V

Total	counter	CNT1			-1	TCNTD


	Control panel PCB
CCV		5V
J504-2

	-4		J503-11		J316-1	CCNTC
	-3		J503-10		-2	CCNNT
	-1
Power indicator		J501		J315
PCB		5V	J502
	J505-1		J503		J316
	-2
Density volume	5V
PCB	J506-3

	-2		J501-1	J315-10	DNST
	-1
VR501
	H V T
				Figure 2-107

when «0» FM1 ON

when «0» FM2 ON

when «0» Pre-exposure lamps ON

when «0» Total counter operates

When «0» Operates.

When «0» Card sensed.

The voltage changes according to the volume setting.

See p. 4-5.

2-8

CANON NP6317 REV.0 APR. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)

CHAPTER 2 BASIC OPERATION

E.Basic Sequence of Operations (Direct, Continuous Copying (2 sheets))

WMUPR

POWER SWITCH 90 C

110 C COPY START key

SCRV

WMUP

STBY

INTR

SCFW

LSTR

STBY

AER

Main motor(M1)

Scanning lamp

Primary/transfer

corona assembly

Scanner is set for

Forward

Scanner movement

HOME position

Reverse

* Numbers in parentheses apply to

when the CT unit is used.

Figure 2-108

Period

Purpose

Remarks

WMUP

From switch on until the

Allows time for fixing

Warm-up time varies

(Warm-up)

fixing roller temperature

roller to warm up.

with fixing roller tem-

reaches 155°C.

perature at power ON.

When the COPY START

key lights green.

WMUPR

Until the fixing roller

Keeps fixing roller tem-

• After the WMUPR pe-

(Warm-up

temperature reaches 90°C

perature uniform.

riod ends, the READY/

rotation)

to 110°C for the.

WAIT indicator changes

from flashing green to

green.

• Even when the fixing

roller has warmed up, it

rotates for at least 4.2

sec.

INTR

About 2.2 sec after the

Stabilizes drum sensitiv-

A PAPER FEED signal is

(INITIAL

COPY START key is

ity to prepare for copying.

generated to feed first

rotation)

pressed.

sheet of copy paper.

Table 2-101a

CANON NP6317 REV.0 APR. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)

2-9

CHAPTER 2 BASIC OPERATION

	Period	Purpose	Remarks

AER	From when the scanner	Moves the scanner for-	In the non-AE mode the
(AE rotation)	moves forward about 70	ward about 70 mm from	scanner does not move
	mm from the end of the	the end of the image and	forward or in reverse.
	image until it returns to	measures the document
	its home position.	density.

SCFW	When the scanner is mov-	The scanning lamp illu-	• A REGISTRATION sig-
(Scanner	ing forward	minates original, and the	nal is generated, and
forward)	• Travel distance changes	reflected optical image is	copy paper is fed to the
	with copy paper size.	transmitted to photo-	transfer area.
		sensitive drum through	• A PAPER FEED signal
		mirrors and lens array.	is generated to feed the
			next sheet of copy paper.

SCRV	While the scanner is mov-	The scanner is moved
(Scanner	ing in reverse.	back to HOME position
reverse)	• The speed of the reverse	to prepare for the next
	movement is 2.5 times	copy.
	that of the forward
	movement.

LSTR	Until the main motor	Ensures full discharge of
(LAST rotation)	stops after SCRV until	the last copy.
	the last copy ends.

STBY		Waits until the COPY
(Stand-by)		START key is pressed.

Table 2-101b

2-10

CANON NP6317 REV.0 APR. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)

CHAPTER 3

EXPOSURE SYSTEM

1.Disconnect the power cord for safety before disassembly or reassembly work.

2.Group the screws by type (length and diameter) and location.

3.The mounting screws are equipped with washers to protect against static electricity; do not leave them behind when attaching the covers.

4.The mounting screw for the grounding wire is equipped with a washer to ensure electrical continuity; make sure that the washer is attached to the screw when removing/fitting it.

5.If possible, avoid operating the machine with any of its parts removed.

6.Unless otherwise noted, re-assembly is the reverse of disassembly.

I. BASIC OPERATION ……………….	3-1	D. Scanner Movement for
A. Changing the Reproduction		Two-Page Separation Mode
Ratio ………………………………..	3-1	(copy count «2») …………………	3-7

II. LENS DRIVE SYSTEM …………….	3-2	IV.	No. 4/5 MIRROR DRIVE
A.	Outline ……………………………..	3-2		SYSTEM ………………………………..	3-8
B. Basic Lens Drive System		V.	DISASSEMBLY AND
	Operation (change of			ASSEMBLY ………………………….	3-11
	reproduction ratio) ……………..	3-3		A.	Lens Drive Assembly ………	3-11
III. SCANNER DRIVE SYSTEM …….	3-4		B.	Scanner Drive Assembly ….	3-14
A.	Outline ……………………………..	3-4		C.	Exposure Assembly ………..	3-17
B.	Relation Between Scanner			D.	Blank Assembly ………………	3-19
	Sensor and Signals ……………	3-5		E.	No. 4/5 Mirror Mount………..	3-20
C.	Basic Scanner Operation ……	3-6

CANON NP6317 REV.0 APR. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)

CHAPTER 3 EXPOSURE SYSTEM

I.BASIC OPERATION

A.Changing the Reproduction Ratio

The reproduction ratio across the drum is varied by changing the position of the lens and the position of No. 4 and No. 5 mirrors. It is moved by the lens drive system. The reproduction ratio around the drum is varied by changing the speed of the scanner. Figure 3-101 shows how the position of the lens and mirror is varied to change the reproduction ratio across the drum.

100%

50%

200%

Figure 3-101

The scanner drive system changes the reproduction ratio around the drum by varying the speed at which mirror 1 moves relative to the peripheral speed of the drum. (The scanner consists of mirror 1 and the scanning lamp.)

The mirror speed is higher than the drum peripheral speed for REDUCTION and lower for ENLARGEMENT.

Note:

For DIRECT copying, the speed of the mirror is the same as the peripheral speed of the drum.

CANON NP6317 REV.0 APR. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)

3-1

CHAPTER 3 EXPOSURE SYSTEM

II. LENS DRIVE SYSTEM

A.Outline

The lens is moved by the scanner motor (M2). Normally, the coupling gear is in its upper position, and connects the scanner motor to the scanner drive capstan. To move the lens, the lens solenoid (SL2) goes ON, causing the coupling gear to disengage from the scanner capstan gear and engage with the lens capstan gear. The lens is a «floating element» type. In operation, the relative position of lens elements (individual lenses) changes, and the focal length changes as a result, but the changes are intended to optimize lens sharpness for each reproduction ratio, not to make the lens function as a zoom lens. (The lens should not be dismantled.)

When the scanner motor rotates (CW), the lens will be moved to the left (for ENLARGEMENT) by the capstan and cable.

When the paper size is changed or when the copier is in the REDUCE mode, the blank exposure shutter moves in relation to the distance over which the lens travels, thereby blanking out the width corresponding to the reproduction ratio.

The DC controller indicates ‘E210’ on the control panel in response to an error in the lens drive system.

Couping gear

Scanner drive capstan

Solenoid «ON»

Scanner motor (M2)

SL2

Lens drive cable

Idler gear

Lens

SOLENOIDLENS (LNSD)commandDRIVE

POSITIONHOMELENS (LHP)signal

ENLARGEMENT direction

DC contoroller PCB

Figure 3-201

3-2

CANON NP6317 REV.0 APR. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)

CHAPTER 3 EXPOSURE SYSTEM

B.Basic Lens Drive System Operation (change of reproduction ratio)

	copy start
	key ON

STAND BY	INITIAL ROTATION	SCAN FORWARD
AE ROTATION

Scanner home position sensor (Q5)

Scanner motor (M2)

Scanner movement

Lens solenoid (SL2)

Lens movement

Lens home position sensor (Q6)

Mirror home position sensor (Q4)

Mirror movement

: Forward : Reverse

Figure 3-202

When the paper size is changed or when the copier is in the ZOOM mode, the lens first returns to the home position before moving to the position that corresponds to the cassette size and the reproduction ratio.

This operation is executed also when the ZOOM mode is switched to the DIRECT mode.

CANON NP6317 REV.0 APR. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)

3-3

CHAPTER 3 EXPOSURE SYSTEM

III. SCANNER DRIVE SYSTEM

A.Outline

The scanner is driven by the scanner motor (M2). The direction of rotation of the scanner motor determines whether the scanner moves forward or backward. The forward speed of the scanner motor is continuously variable to produce the required reproduction ratio. The reverse speed is fixed regardless of the reproduction ratio (2.5 times the forward speed for DIRECT copying).

The distance that the scanner moves varies to suit the size of copy paper and the reproduction ratio.

The control panel displays ‘E202’ in response to an error in the scanner motor (M2) or the scanner home position sensor (Q5).

Mirror 2 mount

Mirror 1 mount

Forward

Signal generating plate

Scanner home position sensor (Q5)

Connecting	gear	(SCHP)

Lens gear	signal

SL2		position
LENS DRIVESOLENOID (LNSL)command	Scannerhome
Scanner motor (M2)
Solenoid

«OFF»

				A	J302-5

				COM-A	-4
				A	-6
				B	-2
				COM-B	-1
				B	-3

driver (Q324)	controller	PCB
Motor	DC

Figure 3-301

3-4

CANON NP6317 REV.0 APR. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)

CHAPTER 3 EXPOSURE SYSTEM

B.Relation Between Scanner Sensor and Signals

Scanner sensor	Signal name	Scanner

Forward	Reverse

Scanner home	SCHP

position sensor
(Q5)

Meaning

•Grid bias ON

•After 0.1 sec, the scanner stops advancing.

Table 3-301

CANON NP6317 REV.0 APR. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)

3-5

CHAPTER 3 EXPOSURE SYSTEM

C.Basic Scanner Operation

POWER switch ON	COPY START key ON
WMUP	STBY INTR	SCFW SCRV SCFW SCRV LSTR
	AER

Scanner home position sensor (Q5)signal

Pre-registration paper sensor (Q2) signal

Forward Reverse

Scanner movement

Scanning lamp

Figure 3-302

3-6

CANON NP6317 REV.0 APR. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)

CHAPTER 3 EXPOSURE SYSTEM

D.Scanner Movement for Two-Page Separation Mode (copy count «2»)

Doc.L.E.

Doc.L.E. Doc.L.E. Doc.L.E.

INTR

(1st page)

(1st page)(2st page) (1st page) (2st page)

SCRV1

SCRV2

STBY

SCFW1

SCFW2

LSTR

Scanner home position sensor signal (Q5)

SCANNER FORWARD command (SCFW)

SCANNER REVERSE command (SCRV)

Scanning lamp (LA1)

ForwardForward Forward Forward

Reverse

Figure 3-303

Timing of operations, i.e., I, II, and III shown in Figure 3-304, is with reference to the leading edge of the first page of the document (fall of Q3 signal).

I:The distance traveled by the scanner from the leading edge of the original is determined by the reproduction ratio and the copy paper size, just as for a normal copy.

II:This is roughly the same as I. If the forward distance traveled by the scanner is greater than 210 mm (220V, or 240V copier) the DC controller will judge that 210 mm is the leading edge of the original. If the distance that the scanner moves forward is less than 210 mm, the point at which the scanner reverses in I will be the leading edge of the second page of the document.

III: Same as I.

CANON NP6317 REV.0 APR. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)

3-7

CHAPTER 3 EXPOSURE SYSTEM

IV. No. 4/5 MIRROR DRIVE SYSTEM

1.Outline

The copier changes the reproduction ratio by varying the position of the No. 4/5 mirror and moving the lens. Figure 3-401 shows the positions of the mirror and the lens according to different reproduction ratios.

The mirror is driven by the mirror motor (M3), and its position is monitored by the mirror home position sensor (Q4). The mirror is positioned with reference to the number of motor pulses counted from the mirror home position.

When the power is turned on, the mirror motor (M3) continues to rotate clockwise until the mirror home position sensor (Q4) turns on. Thereafter, it rotates counterclockwise for a specific number of pulses to stop the No. 4/5 mirror at Direct position.

When a non-Direct ratio is selected during standby, both mirror and lens are driven accordingly.

Mirror motor (M3)

Mirror

home position sensor (Q4)

	Enlargement /
Direct	Reduction

Figure 3-401

3-8

CANON NP6317 REV.0 APR. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)

CHAPTER 3 EXPOSURE SYSTEM

2.Driving the Scanner Motor (M2) and the Mirror Motor (M3)

Figure 3-402 is a block diagram showing the drive circuit used for the scanner motor (M2) and the mirror motor (M3). These motors are 4-phase stepping motors.

The pulse signals used to drive the motors (MIRRA, MIRRA*, MIRRB, MIRRB*) are generated by Q300 of the DC controller PCB; on the other hand, the motor select signal (MIRRCOM, SCNCOM) is generated by Q300 and Q303.

The motor selected by the motor select signal is controlled for direction and speed by the pulse signals from Q300.

DC controller PCB
			24V
Q300	Q320	Q319
(CPU)	MIRRCOM
	MIRRA	Q323	5V			Mirror
				J303
			Q325	MIRRA	motor
		5V		5


	MIRRA*	Q326		COM	3	M3

			Q325
			MIRRA*
		5V		4
	MIRRB	Q327	Q325	MIRRB
		2


		5V		MIRRB*
	MIRRB*	Q328	Q325	1


			5V	5V
			Q329	Q330
			Q371	Q370
			TDA	TDB
			Q324
			Scanner motor		Scanner
			driver		J302
			24V	PMA	motor
	Q365	Q321	5
Q303
SCNCOM
		COM
			4	M2


				PMA*	6

				PMB	2
				COM
				1
				PMB*
				3

			Figure 3-402

CANON NP6317 REV.0 APR. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)

3-9

CHAPTER 3 EXPOSURE SYSTEM

100% to	70% to	50% to
70%	50%	200%
setting	setting	setting

Scanner motor (M2)

Lens HP sensor (Q6)

Mirror motor (M3)

Mirror HP sensor (Q4)

:motor foward

:motor reverce

Figure 3-403

3-10

CANON NP6317 REV.0 APR. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)

CHAPTER 3 EXPOSURE SYSTEM

V. DISASSEMBLY AND ASSEMBLY

A.Lens Drive Assembly

1.Outline

The unit is adjusted at the factory with high precision using special tools. Do not remove parts or loosen screws other than those discussed.

Lens pully

fixing plate

[2]

4 turns

Mounting screws

[3]

Cable fixing

Pulley mount

Figure 3-501

CANON NP6317 REV.0 APR. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)

3-11

CHAPTER 3 EXPOSURE SYSTEM

2.Detaching the Lens Cable

1)	Detach the copyboard cover, copyboard
	glass, lens cover, rear cover, and upper
	rear cover.
2)	Remove the three screws shown in Figure	[1]
	3-502, and detach the upper frame.

[1] Screws

Figure 3-502

3)Mark the position of the pulley mount and the cable mount using a scriber.

4)Remove the two screws that hold the pulley mount in place.

5)Detach the cable.

3-12

CANON NP6317 REV.0 APR. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)

CHAPTER 3 EXPOSURE SYSTEM

3.Routing the Lens Cable

1) Remove the two screws that hold the lens
pulley mount in place, and detach the lens	[2]
pulley; see Figure 3-501.	[1]

[3]

[1]	Screws	[2] Pulley
[3]	Pulley mount

Figure 3-503

2)Wind the lens cable around the lens pulley as shown in Figure 3-504; then, fix it using two screws.

3)Shift the pulley mount to the position marked with a scriber, and fix it in place using two screws.

CANON NP6317 REV.0 APR. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)

3-13

CHAPTER 3 EXPOSURE SYSTEM

B.Scanner Drive Assembly

1.Detaching the Scanner Cable

1)Mark the position of the mount, and loosen screws B (2 pcs.), which hold the mount in place.

2)Loosen screw A (1 pcs.), and detach the scanner cable.

2.Attaching the Scanner Cable

1)Route the scanner cable as shown in Figure 3-504.

2)Position the fixing plate where a mark has been put using screw A.

3)Tighten screws B.

[6]

[2]

Top groove of the pulley

Lower groove of the pulley

Scanner pulley

[4] [1]

[3]

Pulley 2

Mark the position

Figure 3-504 Scanner Drive Assembly

3-14

CANON NP6317 REV.0 APR. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)

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INTRODUCTION

CONTENTS

CHAPTER 1

I. FEATURES

III. NAMES OF PARTS

IV. OPERATION

V. IMAGE FORMATION

CHAPTER 2

I. BASIC OPERATION

CHAPTER 3

II. LENS DRIVE SYSTEM

III. SCANNER DRIVE SYSTEM

IV. No. 4/5 MIRROR DRIVE SYSTEM

V. DISASSEMBLY AND ASSEMBLY

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