CANON PC940 - Service Manual Immediate Download

CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)

REVISION 0

FY8-13GA-000

AUG. 1999

PC860

F13-8491

TYA00001-

PC880

F13-8291

TZA00001-

PC890

F13-8242

UAA00001-

PC920

F13-8431

TVB00001-

F13-8441

PUD00001-

PUE00001-

F13-8461

PUH00001-

PC921

F13-8432

TVC00001-

PC940

F13-8436

TVD00001-

PC941

F13-8437

TVE00001-

PC950

F13-8231

TVF00001-

F13-8241

PUF00001-

PUG00001-

PC960

F13-8434

TVG00001-

PC980

F13-8232

TVH00001-

PC981

F13-8233

TVJ00001-

CANON PC800s/900s REV.0 AUG. 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 INFOR-

MATION 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 DIVISION

CANON INC.

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

CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)

i

This service manual has been prepared for the PC800/900 Series machines,

providing basic information used for servicing the machines in the field so as to ensure

their quality and performance.

This service manual consists of the following chapters:

Chapter 1

General Description introduces the machine's features, specifications,

names of parts, and how originals are reproduced.

Chapter 2

Basic Operation explains how copies are made on a step-by-step basis.

Chapter 3

Exposure System discusses the principles of operation used for the

machine's exposure system. It also explains the timing at which exposure-

related mechanisms are operated, and shows how they may be

disassembled/assembled and adjusted.

Chapter 4

Image Formation System discusses the principles of operation used for the

machine's image formation system. It also explains the timing at which image

formation-related mechanisms are operated, and shows how they may be

disassembled/assembled and adjusted.

Chapter 5

Pick-Up/Feeding System discusses the principles of operation used for the

machine's pickup/feeding system. It also explains the timing at which pickup/

feeding-related mechanisms are operated, and shows how they may be

disassembled/assembled and adjusted.

Chapter 6

Fixing System discusses the principles of operation used for the machine's

fixing system. It also explains the timing at which fixing-related mechanisms

are operated, and shows how they may be disassembled/assembled and

adjusted.

Chapter 7

Externals/Auxiliary Mechanisms discusses the principles of operation used

for the machine's externals/auxiliary mechanisms. It also explains the timing

at which auxiliary mechanism-related mechanisms are operated, and shows

how they may be disassembled/assembled and adjusted.

Chapter 8

ADF explains the principles of operation of the ADF in view of electrical and

mechanical functions and in relation to their timing of operation. It also shows

how the unit may be disassembled/assembled and adjusted.

Chapter 9

Installation introduces requirements for the site of installation, and shows

how the machine 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.

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.

INTRODUCTION

CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)

ii

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 sig-

nal.

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 reasons, 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 PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)

iii

Model

PC860

PC880

PC890

PC920

PC921

PC940

PC941

PC950

PC960

PC980

PC981

Type

code

TYA

TZA

UAA

PUD

PUE

PUH

TVB

TVC

TVD

TVE

PUF

PUG

TVF

TVG

TVH

TVJ

Multi-

feeder

Single

feeder

Zoom

Default

ratio

2R2E

3R1E

2R2E

3R1E

ADF

as

standard

Cassette

250 sheets

Universal

500 sheets

Universal

500 sheets

Copying

speed

(cpm) at

Direct

12

10

13

12

13

10

13

The notation "

" indicates that the item in question is available.

· This service manual covers the models shown in the following table. Be sure to have a

good understanding of the difference from model to model before referring to this

manual.

Density

correction

switch

(SW101)