CANON NP6251 - Service Manual Immediate Download

SERVICE

MANUAL

REVISION 0

FY8-13F0-000

JULY 1997

CANON NP6350/NP6251 REV.0 JULY 1997 PRINTED IN JAPAN (IMPRIMÉ 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 supervised to avoid

disclosure

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-shi, Ibaraki 302 Japan

CANON NP6350/NP6251 REV.0 JULY 1997 PRINTED IN JAPAN (IMPRIMÉ AU JAPON)

This Service Manual contains basic data and figures on the plain paper copier

NP6350/NP6251 needed to service the machine in the field.

The NP6350/NP6251 is designed to enable full automatic copying work, and comes

with the following systems accessories:

1. Stapler Sorter-E2

2. RDF-D1

3. Paper Deck-A1

4. Sorter-G1

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

Paper Deck-A1 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 9

Installation introduces requirements for the site of installation, and shows

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

Chapter 10

Maintenance and Servicing provides tables of periodically replaced parts

and consumables/durables and scheduled servicing charts.

INTRODUCTION

Chapter 11

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 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.

CANON NP6350/NP6251 REV.0 JULY 1997 PRINTED IN JAPAN (IMPRIMÉ AU JAPON)

System Configuration

The NP6350/NP6251 is designed to accommodate the following accessories:

CANON NP6350/NP6251 REV.0 JULY 1997 PRINTED IN JAPAN (IMPRIMÉ AU JAPON)

iii

Stapler Sorter-E2

RDF-D1

NP6350/NP6251

(front paper deck + cassette type)

Paper Deck-A1

Sorter G1

Control Card V

It feeds a stack of originals to

the copier, sheet by sheet.

It allows control of

copy volume.

It can automatically sort

and group copies.

It can accommodate

as many as 3,500

sheets of

A4/B5/LTR paper.

In addition to the

functions of the 20-Bin

Stapler Sorter, it can

automatically staple

sorted copies.

It also is equipped with

a front access function,

in which copies may be

removed from the front,

and a multiple stacking

function, in which two or

more sets may be

delivered in a single bin.