Canon FAX-B820 Manuale utente

FAX-B820/B822/B840

Service Manual

First Edition

HY8-10B0-000

Scope

This manual has been issued by Canon Inc., to provide the service technicians of this product with the

information necessary for qualified persons to learn technical theory, installation, maintenance, and repair of

products. The manual covers information applicable in all regions where the product is sold. For this reason, it

may contain information that is not applicable to your region.

Revision

This manual could include technical inaccuracies or typographical errors due to improvements or changes made

to the product. When changes are made to the contents of the manual, Canon will release technical information

when necessary. When substantial changes are made to the contents of the manual, Canon will issue a revised

edition.

The following do not apply if they do not conform to the laws and regulations of the region where the manual or

product is used

Trademarks

Product and brand names appearing in this manual are registered trademarks or trademarks of the respective

holders.

another language without the written permission of Canon Inc., except in the case of internal business use.

CANON INC.

5-1 Hakusan 7-Chome, Toride-city, Ibaraki 302-8501, Japan

I. MANUAL OUTLINE

This manual is divided into three parts, and contains information required for servicing the product.

Part 1: Maintenance

Information on maintenance and troubleshooting of the product.

Part 2: Technical Reference

New technology and technical information of the product.

Part 3: Appendix

Schematic and Specifications.

Reference

This manual does not provide sufficient information of disassembly and reassembly procedures. Refer to the

graphics in the separate Parts Catalog.

II. Table of Contents

Page Part 1: Maintenance

1 - 1 1. Maintenance

1 - 1 1.1 Adjustment, Periodic Replacement Parts, Periodic Maintenance, Replacement of

Consumables by Service Engineer

1 - 1 1.2 Customer Maintenance

1 - 2 1.3 Product Life

1 - 2 1.4 Special Tools

1 - 2 2. LIST OF ERROR DISPLAY

1 – 2 2.1 Troubleshooting Index

1 - 3 2.2 Errors shown on display (judgment criterion: check diplay)

1 - 5 2.3 Errors not shown on display

1 - 8 3. Repair

1 - 8 3.1 Caution when replacing service parts

1 - 20 3.2 Service Switches

1 - 28 3.3 Explanation of service data

1 - 36 3.4 Test Function

Page Part 2: Technical Reference

2 - 1 1. New Technology

Page Part 3: Appendix

3 - 1 1. Schematic

3 - 2 2. Specifications

Part 1

Maintenance

1.MAINTENANCE

1.1 Adjustment, Period Replacement Parts, Periodic Maintenance, and Replacement

Consumables by Service Engineer

Resetting the ink counter

(1) Adjustment

Item When Purpose Tool When

Adjusting gear phase When replacing gear unit To adjust gear phase

Resetting the ink counter When replacing NK ABSORBER To reset the ink counter

CS pre-scan When replacing CS To set scan data

Data Set When replacing SCNT board

When replacing CR

To initialize data and

restore factory setting

(2) Periodic maintenance

Item When Purpose Tool When

None

(3) Periodic replacement parts

Item When Purpose Tool When

None

(4) Replacement consumables

Item When Purpose Tool When

None

1.2 Customer Maintenance

Adjustment Timing Purpose Tool Approx.

time

Print head cleaning Whenprint quality is not satisfying. To improve nozzle

conditions.

BJ FAX Cartridge

replacement

When an BJ FAX Cartridge becomes

empty.

Paper feed roller When paper does not feed properly. To clean the paper

feed rollers.

1-1

1.3 Product Life

(1) Printer

The value from (I) - (III), whichever comes first.

(I)18,000 pages of printing

(II)18,000 pages of scanning

(III)5 years of use

(2) Print CRG (ink tank)

Approx. 900 pages of printing

*When printing Canon Fax Standard Chart No.1

1.4 Special Tools

Name Tool No. Purpose Remarks

None

2. LIST OF ERROR DISPLAY

2.1 Troubleshooting Index

Use the troubleshooting index below to investigate the cause of the problem and refer to the specified page for

countermeasures.

[Problem]

2.1.1 Errors shown on display (judgment criterion: check display)

When errors shown on display Refer to 1-3 page

When errors not shown on display Refer to 1-5 page

2.1.2 Errors not shown on display (judgment criterion: check machine)

General errors Referto1-5page

No power

Abnormal display

Operation panel buttons do not work

No sound from speaker

Printing failure (judgment criterion: test print failure)

Paper not properly fed Refer to 1-6 page

Paper not picket up from ASF

Printing operation abnormality Refer to 1-6 page

Nothing is printed

Carriage motor does not move

1-2

Print quality defect Refer to 1-6 page

Print is not clear

Blurred image or smudged print

Stain on the back of printout

Inconsistent print quality

Head cleaning required

Horizontal white streaks in black header

Scanning failure (judgment criterion: test print is OK but

copy fails)

Scanning failure Refer to 1-7 page

Document slips on the rollers

Document is not properly separated

Scanning assembly sensor broken

Abnormality in scanned image Refer to 1-7 page

Nothing printed

Vertical streaks in image

2.2 Errors shown on display (judgment criterion: check display)

2.2.1 User error messages

Check the error message in question and take the appropriate action.

[BUSY/NO SIGNAL] (#018)

Cause: Other party machine does not respond within 55 seconds. (T0 timeout)

Countermeasure: Contact the other party and have them check the condition of their fax.

Transmit manually. In the case of an international call,

insert a pause into the programmed telephone number.

Cause: The machine’s tone/ pulse dial settings are not correct.

Countermeasure: Programme the settings according to the telephone line being used.

Cause: Other party machine is not a G3 fax.

Countermeasure: Contact the other party and have them send or receive in G3.

Cause: Other party machine is broken.

Countermeasure: Contact the other party and have them check the condition of their fax machine.

Cause: Dialled number is busy.

Countermeasure: Call again later.

1-3

[CARTRIDGE JAMMED]

Printer position correction failure

Cause: Carriage does not operate normally, for one of the following reasons.

Carriage shaft is broken/ deformed. Broken /deformed parts

Or, contact sensor unit does not return from scanning position.

Countermeasure: Replace printer assembly or contact sensor unit.

[CHECK DOCUMENT] (#001)

Cause: PAPER JAM

This message appears when the document edge sensor cannot detect the edge of the document after the

document sensor detects the presence of the document and the feeder roller rotates 360 degrees to perform one

document feeding operation

Countermeasure: Clear the document jam.

[CHECK PAPER SIZE]

Cause: The size of paper set in the ASF is different from the paper size programmed in the printer.

Countermeasure: Change the printer’s PAPER SIZE setting to the correct paper size.

[CHECK PRINTER] (##332 to ##337, #343, ##345, ##346, ##348)

Cause: Printer internal failure

Countermeasure: (1) Is the BJ cartridge’s operation being hampered by jammed paper? Clear the jammed paper.

(2) Press the STOP button.

(3) Reset the BJ cartridge.

(4) Turn the power OFF/ ON.

(5) Refer to the appropriate action for the error code.

[DATA ERROR]

Cause: SRAM data have been destroyed and a checksum error has been generated because

the lithium battery is dead or some kind of SRAM failure.

Countermeasure: (1) Perform ALL CLEAR in the service mode.

(2) Replace the SCNT board.

[DOC. TOO LONG] (#003)

Cause: The document length exceeds 700cm.

Countermeasure: Make a reduced size copy of the document and send it again.

1-4

[MEMORY FULL] (#037)

Cause: A very large document has been received in memory reception and the memory is full.

Countermeasure: (1) Print out the document(s) stored in the memory and try the operation again.

(2)Deleteanyunnecessarydocumentsfromthememory.

Cause: There are too many pages in the transmission document and the transmission memory is full.

Countermeasure: Split up the document and send it.

2.2.2 Error codes

a) Service error code output

When service data #1 SSSW SW01 bit 0 is set to ‘1’, if a transmission ends in error,

a service error code will be output on the transmission activity report, reception results report and

the error transmission report. Also, in the event of an error, the error code will be shown on

the display.

b) Error codes

Refer to ‘G3/G4 Facsimile Error Codes Service Handbook’ for details on error code causes

and countermeasures.

2.3 Errors not shown on display

2.3.1 General errors

·No power

(1) Check that the power cord is properly connected.

(2) Check the connection between the SCNT board (J151) and the power supply unit.

(3) Check the power supply unit fuse (F1).

(4) Replace the power supply unit.

(5) Replace the SCNT board.

·Abnormal display

Nothing displayed

(1) Check the connection between the control panel unit and the SCNT board (J202).

(2) Replace the control panel unit.

(3) Replace the SCNT board.

Part of the LCD does not display

(1) Check the connection between the control panel unit and the SCNT board (J202).

(2) Replace the control panel unit.

(3) Replace the SCNT board

· Operation panel buttons do not work

(1) If test mode can be used, check which buttons do not work.

(2) Check the connection between the control panel unit and the SCNT board (J202).

(3) Replace the control panel unit.

(4) Replace the SCNT board.

1-5

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