Canon B95 User Manual

FAXPHONE B95

SER VICE MANUAL

Canon

Copyright 2004, Canon U.S.A. This technical publication is the proprietary and confidential information of Canon U.S.A. which shall be retained for reference purposes by Authorized Service Facilities of Canon U.S.A. Its unauthorized use is prohibited.

FAXPHONE B95 Service Manual

REVISION 0

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.

All right reserved. No part of this manual may be reproduced in any form or by any means or translated into another language without the written permission of Canon Inc., except in the case of internal business use.

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 displ a y 1 - 9 3. Repair 1 - 9 3.1 Caution when replacing service parts 1 - 23 3.2 Service Switches 1 – 30 3.3 Explanation of service data 1 - 38 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

(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

(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

When replacing CR

To initialize data and restore factory setting

Adjustment Timing Purpose Tool Approx.

time

Print head cleaning When print quality is

not satisfying. BJ FAX Cartridge replacement Paper feed roller When paper does not

When an BJ FAX

Cartridge becomes empty.

feed properly.

To improve nozzle conditions.

To clean the paper feed rollers.

1-1

1.3 Product Life (1) Printer

The value from 1) - 3), whichever comes first.

1) 18,000 pages of prin ting

2) 18,000 pages of scanning

3) 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.

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

General errors Refer to 1-5 page

Paper not properly fed Refer to 1-6 page Paper not picket up from ASF

Printing operation abnormality Refer to 1-6 page

No power Abnormal display Operation panel buttons do not work No sound from speaker Printing failure (judgment criterion: test print failure)

Nothing is printed Carriage motor does not move

1-2

Print quality defect Refer to 1-7 page

Scanning failure Refer to 1-7 page

Abnormality in scanned image Refer to1-8 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)

Document slips on the rollers Document is not properly separated Scanning assembly sensor broken

Nothing printed Vertical streaks in image

2.2 Errors shown on display (judgment criterion: check display) (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 70cm. 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)Delete any unnecessary documents from the memory. 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) Error codes

1) 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.

2) 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 (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 operation 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 operation unit.

3) Replace the SCNT board

1-5

· Operation panel buttons do not work

1) If test mode can be used, ch eck which buttons do not work.

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

3) Replace the operation unit.

4) Replace the SCNT board.

· No sound from speaker

1) Check the connection between the speaker and the SCNT board (J152).

2) Replace the speaker.

3) Replace the SCNT board.

(2) Printing failure

· Printing failure (ajudgement criterion: copy failure)

· Paper not properly fed (ajudgement criteria: check machine)

· Paper feed motor is not working

1) Check the connection between the paper feed motor and the SCNT board (J302).

2) Replace the paper feed motor.

3) Replace the SCNT board.

· Paper not picked up from the ASF

1) Check for any abnormalities in the paper feed motor drive switching mechanism.

2) Check that the ASF assembly drive gear has been properly attached.

3) Replace the pickup roller unit.

4) Replace the SCNT board (paper edge sensor or pickup roller sensor failure).

· Printing operation abnormality Nothing is printed (blank page)

1) Take out the BJ cartridge and install it again.

2) Clean the BJ cartridge five times.

3) Replace the BJ cartridge.

4) Check the connection between the carriage ribbon cable and the SCNT board (J251).

5) Replace the SCNT board.

Carriage motor does not move

1) Check the connection between the carriage motor and the SCNT board (J301).

2) Replace the carriage motor.

3) Replace the SCNT board.

1-6

·Print quality defect

·Printing quality unstable If the printed image has white streaks or spots, head cleaning should be pe rf ormed. When the following sequence is performed, the BJ cartridge head will be cleaned automatically. Press the Function button, cleaning button and then the START/ COPY button.

· Head cleaning required The print head nozzles sometimes become clogged with paper dust or ink, etc. In such cases, head cleaning should be performed. When the following sequence is performed, the BJ cartridge head will be cleaned automatically. Press the Function button, cleaning button and then the START/ COPY button.

·Horizontal white streaks in black header

1) Clean the BJ FAX cartridge five times. Perform a visual check to see whether ink is being properly ejected.

2) Remove the BJ FAX cartridge and then replace it.

3) Replace the BJ FAX cartridge.

4) Check the connection between the carriage ribbon cable and the SCNT board (J251).

5) Replace the SCNT board.

(3) Scanning failure

· Scanning failure (judgement criterion: reception is OK but copy fails) Document slips on the rollers (evaluation level: visual check. Copy image elongated.)

1) Clean the document feed rollers.

2) Replace the rollers.

Document is not properly separated (evaluation level: check on actual machine.)

1) Check that the paper feed motor is driving all rollers. (Check for any broken gears or foreign

bodies.)

2) Clean the document feed rollers and the document separation rollers.

3) Replace the ASF unit.

Scanning assembly sensor broken (judgement criterion: document is not detected when set or when being fed.)

1) Perform a copy operation and check for any faulty sensors.

2) Check the connections between the sensors and the SCNT board.

3) Replace the SCNT board.

1-7

· Abnormality in scanned image (evaluation level: Check copy image for defects.) Nothing printed

1) Check the connection between the contact sensor and the SCNT board (J201).

2) Clean the white reference.

3) Replace the contact sensor.

4) Replace the SCNT board.

Vertical streaks in image

1) Clean the contact sensor’s scanning glass.

2) Clean the white reference.

3) Check the connection between the contact sensor and the SCNT board (J201).

4) Replace the contact sensor.

1-8

3. Repair

3.1 Caution when replacing service parts (1) Safety Cautions

Electrical shock Be sure to disconnect the power cable and modular cable to prevent electrical shock. If working with power on is required, do not use grounding strap. Using such equipment may create conducting pathway, posing a risk of electrical shock. See the following for parts and co mponents that may generate electrical shock:

• Power supply unit primary (supplied with AC voltage)

• Telephone line primary

High temperature In order to prevent burns during disassembly, allow at least ten minutes, after the power has been switched off, for the high temperature components to cool down. General high temperature components are as follows.

• Motors

• Power supply unit

• Elements on driver ICs, etc., on PCBs (in particular, ICs with heatsinks)

• BJ cartridge aluminum plate

Fire It is dangerous to throw lithium batteries and parts and components containing flammable substances, such as cartridges, etc., into fire. Such parts and components must be disposed of in accordance with local laws and regulations.

Ignition When using solvents such as alcohol, etc., while conducting service, there is a danger of fire igniting from heat from internal circuitry and from sparks. Before using any such solvents, be sure to switch off the power and allow time for high temperature parts to cool down. Make sure that there is sufficient ventilation when working with solvents.

Movable parts In order to prevent accidents with movable parts, be sure to remove the power cable when conducting service that requires disassembly. Also, take care that personal accessories and hair, etc., are not caught in any moving parts.

1-9

(2)

General Cautions

Damage due to electrostatic discharge This machine contains contact sensors and printed circuit boards that use ROMs, RAMs, custom chips and other electronic components that are vulnerable to damage by electrostatic discharge. Be careful to avoid any damage from electrostatic discharge when conducting service that requires disassembly.

*Static electricity warning

Electrostatic discharge can destroy electronic components and alter electrical characteristics. Plastic tools and even your hands, if they are not earthed, contain sufficient static electricity to damage electronic components.

The following materials may be used as countermeasures against electrostatic discharge:

• Earth-connected conductive mat,

• Earth-connected wrist-strap,

• Crocodile clips for the purpose of grounding metallic parts of the main unit.

For service conducted on the user's premises, etc., where such countermeasure materials are not available, the following countermeasures may be employed.

• Use anti-static bags for the storage and carrying of PCBs and electrical elements.

• Avoid silk and polyester clothing and leather-soled shoes, favoring instead cotton clothes and rubber soled shoes.

• Avoid working in a carpeted area.

• Before work, touch the grounded earth terminals of the main unit in order to discharge any static electricity.

• Use a wrist-strap and earth the metal parts of the main unit.

• PCBs and electrical elements must be lifted by holding the edges and avoid direct contact with terminals.

*Caution against electrical shock while working with power on

In cases where service must be carried out with power on, via a connected power cable, be sure to wear an anti-static wrist-strap or other earth, in order to prevent an electrical path being created through your body.

Attaching and removing cables Attaching and removing cables with the power still on may cause breakdowns and should be avoided. In particular, flat cables are likely to cause short circuits. When attaching or removing cables, always be sure to turn the power off.

1-10

(3) Prevention of ink soiling

Be careful when handling the BJ ink cartridge nozzle, head cap, head wiper and waste ink pad. Residual

Ink may soil the main unit, working surfaces, your hands and clothes, etc. The ink is water-soluble, but because it contains pigments, it will not wash out of clothes. The ink does not contain any substances that are harmful to humans, but does contain organic solvents (isopropyl alcohol 67-63-0, glycerin 56-81-5 and ethylene glycol 107-21-1). If the ink should accidentally get into someone’s eyes, rinse the affected eye with plenty of clean water and seek medical attention. If a large quantity of ink is accidentally swallowed, seek medical advice immediately. In such a case, let the doctor know exactly what is written on the BJ cartridge label.

Conductivity of the ink The ink used in the BJ cartridge is conductive. This means that, if the ink leaks, mechanical parts should be wiped with a dampened paper towel or similar and electrical circuits wiped with tissue paper so that all ink is removed from below the IC chips. If power is switched on while ink is leaking on the electrical circuits, the circuitry may short out and be damaged. If ink is leaking, the power must be switched off.

1-11

(4) Action in the Event of Abnormality (All Clear)

In the event of extreme noise or shock, etc., in very rare cases, the display may go out, and all the buttons become inoperable. In that case, perform an All Clear. This operation returns all values and settings to their default settings.

[16:50 FaxTal] Standby State (Time and RX Mode displayed on LCD)

1. Select User Data Mode: Press the function button.

[DATA REGSTRATION]

2. Select Service Data Mode: Press the [#] button.

[#1 SSSW]

3. Press [Í] [Î] until [ #8 CLEAR] appears.

[#8 CLEAR]

4. Press the [Start/Copy] button. Press [Í] [Î] to select ALL.

*ALL will initialize all data.

[ALL]

5. Press the [Start/Copy] button.

[PRESS START KEY]

6. Press the [Start/Copy] button.

[CLEAR OK] [PLEASE WAIT]

7. Standby State

Figure 1-1 How to Perform ALL CLEAR

1-12

(5) PRODUCT TRANSPORTATION

Please follow procedures below when to transport repaired products.

1) Be sure to attach the BJ cartridge to a carriage unit.

2) Turn off the printer, and secure the carriage locks in the home position. * If the print head is removed from the printer and left alone by itself, ink is likely to dry.

For that reason, keep the print head installed in the printer even during transportation. Then, securely lock the carriage in the home position, to prevent the carriage from moving and applying stress to the carriage, during transportation.

(6) Caution about Data

Data to be deleted when the machine is turned OFF. The following data will be deleted when the blackout happens or when the power cord is unplugged from the outlet.

FAX Image Data

*Audio data is stored in the flash memory, and therefore will not be deleted by turning OFF the machine.

Data to be Held in the Memory

The machine will back up all data stored in the control memory to SRAM memory in the case of blackout and unplugged powe r c or d.

1-13

(7) Caution about Detaching the Cradle from the Main Unit

PHOTO 1-1

Insert an opener (1) to detach claw from the main unit and remove the cradle from the main unit.

(8) Caution about Detaching the Printer Unit from the Main Unit

PHOTO 1-2

Detach claw (1) on the right edge of the printer unit from the main unit.

1-14

PHOTO 1-3

Detach claw (2) from the main unit by lifting the right edge of the printer unit and moving it to the right.

(9) Caution about Detaching the Operation Unit from the Main Unit

PHOTO 1-4

Push down the Operation Unit by engaging the cut (1)

1-15

+ 46 hidden pages