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Canon MultiPASS C755 Service Manual
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Canon MultiPASS C755 Service Manual

Canon MultiPASS C755 Service Manual

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MultiPASS C755
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Summary of Contents for Canon MultiPASS C755

  • Page 1: Service Manual

    MultiPASS C755 SERVICE MANUAL Canon...
  • Page 2 I. MEANING OF MARKS The marks used in this manual have the following meanings. Mark Meaning States a precaution to be taken to prevent danger to personnel, damage to the product, or damage to electronic components by discharge of static electricity. for example. States a precaution to be taken to prevent damage to electronic components by electrostatic discharge.
  • Page 3 II. ABOUT THIS MANUAL This manual is divided into five parts, and contains information required for servicing the product. Each of the above parts is further divided into the following four chapters: Chapter 1: General Description This part explains product specifications and the how to service the unit safely. It is very important, so please read it.
  • Page 4 III. REVISION HISTORY REVISION CONTENT Original...

  • Page 5: Table Of Contents

    IV. TABLE OF CONTENTS Chapter 1: General Description Page 1 - 1 1. FEATURES 1 - 1 1.1 Overview 1 - 2 2. SPECIFICATIONS 1 - 2 2.1 General Specification 1 - 2 2.2 Communication Specification 1 - 3 2.3 Color Communication Specification 1 - 4 2.4 Scanner Specification 1 - 6...
  • Page 6 3 - 4 2.3 Document Feed/Eject Roller 3 - 4 2.4 Separation Guide 3 - 4 2.5 Scanning Glass (Contact Sensor) 3 - 4 2.6 White Sheet 3 - 4 2.7 Printer Platen 3 - 6 3. ADJUSTMENT 3 - 6 3.1 CS LED Lights-on Duration Adjustment 3 - 7 3.2 When Adjustment of the Print Head Position is Required...
  • Page 7 3 -57 7. TEST FUNCTIONS 3 -57 7.1 User Test Print Functions 3 -57 7.1.1 Nozzle check 3 -58 7.2 Service Test Functions 3 -58 7.2.1 Test mode overview 3 -59 7.2.2 Test mode flowchart 3 -61 7.2.3 D-RAM tests 3 -61 7.2.4 CS tests 3 -62...

  • Page 8: Features

    *: This mark indicates a new function. Picture Quality Color Printer High quality printing can be accomplished with the Canon Bubble Jet (BJ) method using the maximum 1440dpi 720dpi resolution. Various kinds of media can be printed with the high speed of a maximum 8.7 pages per minute.

  • Page 9: Specifications

    MultiPASS C755 Chapter 1: General Description 2. SPECIFICATIONS 2.1 General Specification Type Desktop Body colour Art gray Power source 98 ~ 132V AC, 48 ~ 62 Hz Power consumption Standby 6.0 W Max. 44.9 W (when 100% black copy) Usage environment.

  • Page 10: Color Communication Specification

    MultiPASS C755 Chapter 1: General Description Time required for transmission protocol Pre-message Post-message Post-message * Protocol Protocol * Protocol * Mode (between pages) (after pages) G3 standard approx.18 sec. approx.4 sec. approx.4 sec. V.8/V.34 approx.8 sec. approx.2 sec. approx.2 sec.

  • Page 11: Scanner Specification

    MultiPASS C755 Chapter 1: General Description 2.4 Scanner Specification Type Sheets ADF capacity Max. 20 sheets (A4/Letter) Max. 10 sheets (Legal) Effective scanning width Letter/Legal 8.42" (214 mm) 8.19" (208 mm) Scanning method Contact sensor scanning method Scanning resolution 600 dpi Scanning line density &...
  • Page 12 MultiPASS C755 Chapter 1: General Description Scanning range Sheet dimensions (W Maximum 8.50" 39.3" (216 mm 1000 mm) Minimum 3.5" 1.75" (88.9 mm 44.5 mm) Thickness multiple pages: 0.003" ~ 0.005" (0.08 mm ~ 0.13 mm) 75~90 g/m single page: 0.003"...

  • Page 13: Printer Specification

    MultiPASS C755 Chapter 1: General Description 2.5 Printer Specification Printing method Bubble-jet ink on-demand BJ Cartridge Black BJ Cartridge Color BJ Cartridge Photo BJ Cartridge BC-30 BC-33 BC-34Photo Product code F45-1471 F45-1491 F45-1511 Structure Separate type ink tank Separate type ink tank...
  • Page 14 MultiPASS C755 Chapter 1: General Description Printing range (Black & White FAX) Paper dimensions (W Letter 8.50" 10.98" (216 mm 279 mm) Legal 8.50" 14.02" (216 mm 356 mm) 8.27" 11.69" (210 mm 297 mm) Paper leading edge PRINTING DROP OUT RANGE...
  • Page 15 MultiPASS C755 Chapter 1: General Description Printing range (Color FAX & Printer mode) Plain paper and Special media (Color FAX & Printer mode) Min. 7.17 1012 inch(182 257 mm) Max. 8.5 14.0 inch(216 356 mm) Feed direction (Plain paper , etc.) 1.26 inch/32.0 mm...

  • Page 16: Copy Specification

    MultiPASS C755 Chapter 1: General Description Banner paper Max.6 folds (To be cut at the edge of the 7th fold) : Recommended print area : Printable area a=0.13inch / 3.4mm b=0.13inch / 3.4mm c=0.12inch / 3.0mm d=1.26inch / 32mm Figure 1-4 Printing Range (2) 2.6 Copy Specification...

  • Page 17: Function

    MultiPASS C755 Chapter 1: General Description 2.7 Function Dialling Manual dialling Numeric button Auto dialing Max. 120 digits One-touch:12, Coded speed:100, Numeric button:1 Group dial Max.111 locations Redial Numeric button redial function (Max. 120 digits) Transmission Broadcast transmission Max. 113 locations (One-touch:12, Coded speed:100, Numeric...
  • Page 18 MultiPASS C755 Chapter 1: General Description Others Closed network None Direct mail prevention None Reception printing in reverse order None Memory box None Memory backup Backup contents Dial registration data, User data, Service data, Time Backup IC 273 kbit SRAM for control Backup device Lithium battery 3.0V DC/220 mAh...

  • Page 19: Overview

    MultiPASS C755 Chapter 1: General Description 3. OVERVIEW 3.1 External View Front View ADF (AUTOMATIC DOCUMENT FEEDER) DOCUMENT SUPPORT and PRINTER COVER Holds documents as Holds documents to be scanned. they feed into the ADF. PAPER REST Supports print media...

  • Page 20: Back View

    MultiPASS C755 Chapter 1: General Description Back View PARALLEL INTERFACE PORT USB PORT TELEPHONE/ ANSWERING MACHINE/ DATA MODEM JACK TELEPHONE LINE JACK POWER CORD CONNECTOR Inside View PRINTER COVER CARTRIDGE HOLDER Figure 1-6 External View (2) 1-13...

  • Page 21: Operation Panel

    MultiPASS C755 Chapter 1: General Description 3.2 Operation Panel Operation Panel Numeric Buttons Document Feed Lever Enter numbers when Sets the ADF to (automatic document feed) for feeding dialing or registering multipage documents, or to (manual document feed) for feeding single sheets.
  • Page 22 MultiPASS C755 Chapter 1: General Description One-Touch Speed Dialing/Special Function Buttons The buttons on the right of the operation panel have the following two functions: • One-Touch Speed Dialing Buttons The buttons marked 01 to 12 can be used to dial fax/telephone numbers pre- registered under these buttons.
  • Page 23 MultiPASS C755 Chapter 1: General Description Guidelines for Entering Numbers, Letters, and Symbols When you come to a step that requires you to enter a name or number, refer to the table below to determine which numeric button to press for the character you want.

  • Page 24: Consumables

    BJ ink tanks that are placed inside the “holder.” You can replace individual BJ tanks as they run out. Canon offers several BJ cartridges for use with the MultiPASS. Color BJ Cartridge (Either one included with your MultiPASS) Prints in color and monochrome. It contains four BJ tanks: Black, cyan, magenta, and yellow.
  • Page 25 • To help ensure the maximum life of your BJ cartridges, always follow the guidelines for cartridge maintenance. • For optimum printing results and to avoid printing problems, Canon recommends that you only use the Canon BJ cartridges and tanks mentioned in this guide.

  • Page 26: Print Media

    The connected sheets are divided by perforations and you can print from two to six sheets at a time. Canon Banner Paper is specially designed for use with Bubble Jet printers and produces bright and vivid color images.
  • Page 27 High Gloss Photo Film HG-201 Canon High Gloss Photo Film HG-201 features a bright white finish that lends striking visual power to charts, graphs, and photographic images. It creates a sharper and more vivid color output than is possible with coated paper. Use of this film gives your presentation materials and graphics a professional look.

  • Page 28: Attention To Be Paid During Assembly/Disassembly

    MultiPASS C755 Chapter 2: Assembly and Disassembly 1. ATTENTION TO BE PAID DURING ASSEMBLY/ DISASSEMBLY 1.1 Safety Cautions Electrical shock In order to prevent any risk of electrical shock, always be sure to check that the power cord and modular jack have been removed.

  • Page 29: General Cautions

    MultiPASS C755 Chapter 2: Assembly and Disassembly 1.2 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.

  • Page 30: Product-Inherent Cautions

    MultiPASS C755 Chapter 2: Assembly and Disassembly 1.3 Product-Inherent Cautions Prevention of ink-soiling Be careful when handling the BJ ink cartridge nozzle, the ink pad, 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.

  • Page 31: Disassembly/Assembly

    MultiPASS C755 Chapter 2: Assembly and Disassembly 2. DISASSEMBLY/ASSEMBLY 2.1 Parts Layout The parts layout of this machine consists of the scanning assembly, printing assembly and printer. Separation roller Pick up roller Document feed motor Lifting plate Document eject roller...
  • Page 32 MultiPASS C755 Chapter 2: Assembly and Disassembly The electrical parts are laid out as follows. • SCNT board ......system control • PCNT board ......printer control • NCU board ......interface with telephone line • Power supply unit ....supplies power to the units and assemblies •...

  • Page 33: Disassembly Work-Flow

    MultiPASS C755 Chapter 2: Assembly and Disassembly 2.2 Disassembly Work-Flow The work-flow for the disassembly of the main units is as follows. In order to replace parts, you need to confirm which parts have to be removed. Numbers in parenthese indicate the disassembly number.

  • Page 34: Disassembly Procedure

    MultiPASS C755 Chapter 2: Assembly and Disassembly 2.3 Disassembly Procedure Disassembly 1. Upper covers/printer covers (1) Remove the three screws (a). (2) Remove the two tabs (b), then remove the upper cover (c), and the printer cover (d). Figure 2-5 Disassembly 1 To remove the upper cover, insert the tool into the two holes shown in the diagram and prise loose the tabs.
  • Page 35 MultiPASS C755 Chapter 2: Assembly and Disassembly Disassembly 2. Scanning assembly (1) Perform disassembly 1. (2) Remove the three cables (e), connected to the SCNT board at the left side of the main unit. Also, remove the cables (f), connecting the SCNT board and the PCNT board. Then, remove the two cables (j), from the carriage motor and the ink sensor, and remove the cable guide (c).
  • Page 36 MultiPASS C755 Chapter 2: Assembly and Disassembly Disassembly 3. SCNT board/NCU board The SCNT board and NCU board can be replaced without removing the scanning assembly. NOTE SCNT board (1) Perform Disassembly 1 and Disassembly 2 (3). (2) Remove the two screws (a), and then take off the whole plate assembly.
  • Page 37 MultiPASS C755 Chapter 2: Assembly and Disassembly Caution when replacing SCNT board. Follow the procedure given below when replacing the SCNT board. NOTE a) Caution before replacing After replacing the SCNT board, you will need to perform an All Clear operation. Be sure to print out any data, etc., that you may need, before you do the All Clear.
  • Page 38 MultiPASS C755 Chapter 2: Assembly and Disassembly Disassembly 4. Print ass’y (1) Perform Disassembly 1., and Disassembly 2. from (2) till (4). Then perform Disassembly 3 (2). (2) Remove the two screws (a). (3) Use a screwdriver or similar to prise loose the two tabs (e).
  • Page 39 MultiPASS C755 Chapter 2: Assembly and Disassembly Disassembly 6. Waste ink absorber (1) Perform Disassembly 4. and then remove the printer assembly. (2) Remove the two waste ink absorber (a, b), one of which is on top of the other.
  • Page 40 MultiPASS C755 Chapter 2: Assembly and Disassembly Disassembly 7. Operation panel (1) Perform Disassembly 1., and Disassembly 2 (5). (2) Remove the two screws (a). (3) Remove the operation panel (b). Figure 2-10 Disassembly 7 Attachment of operation panel sheet The service part unit configuration of the operation panel assembly assumes that it will be used with the operation panel sheet attached.
  • Page 41 MultiPASS C755 Chapter 2: Assembly and Disassembly Disassembly 8. Separation guide (1) Perform Disassembly 7. and remove the operation panel. (2) Remove the spring (a). (3) Remove the separation guide (b). Application of grease The separation pad shaft is coated with grease, so be careful not to get it on your hands or clothes.
  • Page 42 MultiPASS C755 Chapter 2: Assembly and Disassembly Disassembly 10. Contact sensor (1) Perform Disassembly 1. and Disassembly 2, up to step (5). (2) Remove the cover, a, and the three tabs (b). (3) Remove the two screws (c). (4) Remove the contact sensor (d).
  • Page 43 MultiPASS C755 Chapter 2: Assembly and Disassembly Disassembly 12. Document feed motor (1) Carry out Disassembly 1. and Disassembly 2., then take out the ADF assembly. (2) Remove the screw (a), and the earth plate (b). The plate has grease on it, so be careful not to get it on your hands or clothing.
  • Page 44 MultiPASS C755 Chapter 2: Assembly and Disassembly Disassembly 14. ASF unit. (1) Carry out Disassembly 4. (2) Remove the two red screws (c). (3) Bend the tabs (d), with your hand and remove the ASF unit. For details on how to adjust the ASF unit, refer to page 3-9, 3.4 When the ASF Gear Initial Position Adjustment is required.
  • Page 45 MultiPASS C755 Chapter 2: Assembly and Disassembly Disassembly 15. Pickup roller (1) Perform Disassembly 14. (2) Rotate the pickup roller to position (a), and then loosen the tabs (b), and slide out the pickup roller (c), to the left and remove it.
  • Page 46 MultiPASS C755 Chapter 2: Assembly and Disassembly Carriage lock release With a cartridge and carriage mounted, when the printer is powered off, it is usually locked in the carriage capping position. When the printer is able to be powered on, the NOTE carriage lock is released.
  • Page 47 MultiPASS C755 Chapter 2: Assembly and Disassembly Disassembly 17. Carriage unit (1) Carry out Disassembly 4. and remove the printer. (2) Loosen the two screws (a), and remove the carriage belt. (3) Remove the two pins (b). (4) Remove the spring (c).
  • Page 48 MultiPASS C755 Chapter 2: Assembly and Disassembly Disassembly 18. Paper feed motor (1) Perform disassembly up to Disassembly 17 (2) and take off the carriage belt. (2) Remove the two screws (a). (3) Remove the paper feed motor (b). Disassembly 19. Carriage motor (1) Carry out Disassembly 4.
  • Page 49 MultiPASS C755 Chapter 2: Assembly and Disassembly Disassembly 20. Ink sensor (1) Carry out Disassembly 4., and remove the printer assembly. (2) Take off the sensor cover (a). (3) Disengage the ink sensor (b), from the connector cables. Disassembly 21. Spur unit (1) Carry out Disassembly 20.
  • Page 50 MultiPASS C755 Chapter 2: Assembly and Disassembly Disassembly 22. ROM replacement With this unit, there should be no need to replace ROMs, but in the event that ROM replacement becomes necessary, follow the procedure described below. a) Caution After replacing the ROM, you will need to perform an All Clear, so be sure to make a note of any necessary data beforehand.
  • Page 51 MultiPASS C755 Chapter 2: Assembly and Disassembly This page intentionally left blank. 2-24...

  • Page 52: Maintenance List

    MultiPASS C755 Chapter 3: Maintenance & Service 1. MAINTENANCE LIST 1.1 Consumables Level Consumable When User BJ cartridge When normal images are not output even after inserting (BC-30/BC-33 ink into the ink tank and performing repeated HEAD /BC-34 Photo) cleaning.

  • Page 53: Periodic Inspection

    MultiPASS C755 Chapter 3: Maintenance & Service 1.3 Periodic Inspection None 1.4 Periodic Replacement Parts None 1.5 Adjustment Items The following adjustments must be made on this fax. For the adjustment procedure, see 3. ADJUSTMENT on page 3-6. Item When...

  • Page 54: General Tools

    MultiPASS C755 Chapter 3: Maintenance & Service 1.6 General Tools Tool Phillips screwdriver Removing/inserting screws Flat bladed screwdriver Removing/inserting screws Precision Phillips screwdriver Removing/inserting screws Precision flat bladed screwdriver Removing plastic tabs Tweezers Removing coil spring Isopropyl alcohol (IPA) Cleaning the cleaning location...

  • Page 55: How To Clean Parts

    MultiPASS C755 Chapter 3: Maintenance & Service 2. HOW TO CLEAN PARTS 2.1 Main Unit Outer Covers Wipe with a dry, soft cloth. 2.2 Separation Roller Open the operation panel, and wipe with a dry, soft cloth. 2.3 Document Feed/Eject Roller Open the operation panel, and wipe with a dry, soft cloth.
  • Page 56 MultiPASS C755 Chapter 3: Maintenance & Service Separation guide White sheet Printer platen Separation roller Document eject roller Scanning glass Document feed roller Figure 3-1 Cleaning Location...

  • Page 57: Cs Led Lights-On Duration Adjustment

    MultiPASS C755 Chapter 3: Maintenance & Service 3. ADJUSTMENT 3.1 CS LED Lights-on Duration Adjustment a) Overview This adjustment is used to eliminate uneven scanning which can result from variations in light intensity between individual LED’s. Performing the adjustment will therefore have an effect on scanned and copied images.

  • Page 58: When Adjustment Of The Print Head Position Is Required

    MultiPASS C755 Chapter 3: Maintenance & Service 3.2 When Adjustment of the Print Head Position is Required a) Overview When replacing the print heads, the point of ink ejection may be off, preventing clean characters, depending on the state in which BJ cartridge is installed. In order to eliminate this drift, it is necessary to adjust the head position after attaching the BJ cartridge.
  • Page 59 MultiPASS C755 Chapter 3: Maintenance & Service Display ALIGN PRINT HEAD Function Cleaning ALIGN PRINT HEAD Pressing button Printing the HS Pattern HS CHANGE VALUE HS PATTERN PRINT For the Printed B1 pattern, HS B1: DATA ENTRY OK button to enter the Value above the perfectly lines.

  • Page 60: When The Carriage Belt Tension Needs Adjustment

    MultiPASS C755 Chapter 3: Maintenance & Service 3.3 When the Carriage Belt Tension Needs Adjustment When tension on the carriage belt has been loosened, for example, to remove the carriage, the carriage belt tension needs to be adjusted. Use the tension spring tool (QY9-0043) when fixing the pulley assembly before tightening the screws.
  • Page 61 MultiPASS C755 Chapter 3: Maintenance & Service Adjustment Procedures 1) Rotate the pick-up roller to place the ASF unit's cam and the mark in the position shown in Figure 3-7. 2) Hold the gear still with your fingers and fix the ASF unit to the printer chassis by screw. Align the projection of the ASF gear with the indention of the ASF drive gear.

  • Page 62: When The Head Gap Needs Adjustment

    MultiPASS C755 Chapter 3: Maintenance & Service 3.5 When the Head Gap Needs Adjustment If the screws fixing the head gap adjustment plate attached to the printer frame become loose, it will be necessary to adjust the head gap. Preparing for adjustment 1) Remove the printer unit from the main unit.
  • Page 63 MultiPASS C755 Chapter 3: Maintenance & Service Adjustment Procedures 1) Place the gap gauge (QY9-0054) in Position A1. 2) Move the carriage belt manually to bring the carriage to Position A2. Align the right edge of the carriage with the bottom case's rib.
  • Page 64 MultiPASS C755 Chapter 3: Maintenance & Service This page intentionally left blank. 3-13...

  • Page 65: Troubleshooting Index

    MultiPASS C755 Chapter 3: Maintenance & Service 4. TROUBLESHOOTING 4.1 Troubleshooting Index For troubleshooting, use the troubleshooting index below to investigate the cause of the problem and refer to the specified page for countermeasures. Problem • Errors shown on the display (Evaluation criteria: Look at the unit in question.) •...
  • Page 66 MultiPASS C755 Chapter 3: Maintenance & Service • Scanning problem (Evaluation criteria: Test printing is good, but the copied image is no good.) • The document is not fed. Page 3-33. The document feed motor does not run. The document slips against the rollers.
  • Page 67 MultiPASS C755 Chapter 3: Maintenance & Service 4.2 Errors Shown on the Display 4.2.1 User error message Look for the applicable error message and execute the appropriate countermeasures. "BUSY/NO SIGNAL" (#005/#018) Cause: The receiving fax did not answer within 35 seconds. (T1 timer over) Solution: Contact the other party and have them check their fax.You can try to send the...
  • Page 68 MultiPASS C755 Chapter 3: Maintenance & Service "CARTRIDGE JAMMED" Printing position correction failed Cause: Carriage movement prevented by one of the following. Damaged shaft. Parts deformed. (Carriage or guide frame) Insufficient grease. Countermeasure: Replace the shaft. Replace the deformed parts.
  • Page 69 MultiPASS C755 Chapter 3: Maintenance & Service "CHANGE CARTRIDGE" Cause: The printer cover is open and the cartridge holder is moving to the center of the unit. Solution: Wait until the cartridge holder stops, then replace the BJ cartridge or tanks.
  • Page 70 MultiPASS C755 Chapter 3: Maintenance & Service "DOC. TOO LONG" (#003) Cause: The document is longer than 39.4"(1m). Solution: Use a copy machine to make a reduced copy of the document. Then send again. Cause: It took more than 32 minutes to send or copy a document. It took more than 32 minutes to receive a document.
  • Page 71 MultiPASS C755 Chapter 3: Maintenance & Service "M INK EMPTY" Cause: The Mazenta BJ tank in the Color or Photo BJ cartridge is empty. Solution: Replace the Mazenta BJ tank. "MEMORY FULL" (#037) Cause: The fax’s memory is full because it has received too many documents.
  • Page 72 MultiPASS C755 Chapter 3: Maintenance & Service "TRY AGAIN IN B/W" (#085) Cause: You tried faxing a color document to a machine that does not support color faxing. Solution: (1) Try sending again in black & white. (2) Check the received fax machine’s setting for color faxing is available.

  • Page 73: Error Codes

    MultiPASS C755 Chapter 3: Maintenance & Service 4.2.2 Error codes a) Service error code output When service data #1 SSSW SW01 bit 0 is set to “1”, then service error codes are printed on the activity management reports, reception result reports and error transmission reports, when communication ends in an error.
  • Page 74 MultiPASS C755 Chapter 3: Maintenance & Service • EPT (Echo Protect Tone) Change service data #1 SSSW SW03 bit 1. Bit 1:1 Transmit an echo protect tone. Not transmit an echo protect tone. • Adjust NL equalizer. Set service data #2 MENU Parameter No.05 to “ON”.
  • Page 75 MultiPASS C755 Chapter 3: Maintenance & Service c) ERROR CORD LIST for MultiPASS C755 New error codes indicate "new" in this list. C-1) User error code Tx or Rx Definition #001 [ TX Paper jam #003 [ TX/RX ] Copy page, communication time over...
  • Page 76 MultiPASS C755 Chapter 3: Maintenance & Service Tx or Rx Definition ##283 [ TX Excessive repeat protocol during Tx ##284 [ TX DCN reception after TCF transmission ##285 [ TX DCN reception after EOP transmission ##286 [ TX DCN reception after EOM transmission...
  • Page 77 MultiPASS C755 Chapter 3: Maintenance & Service • ECM mode error codes Tx or Rx Definition ##750 [ TX Exceed repeat protocol due to failure to receive significant signals after transmitting PPS-NULL during ECM Tx ##752 [ TX Receive DCN after PPS-NULL transmission during ECM Tx...
  • Page 78 MultiPASS C755 Chapter 3: Maintenance & Service Tx or Rx Definition ##783 [ TX Exceed protocol retransmission limit or T5 time (60 seconds) after EOR-EOM transmission during ECM Tx ##784 [ TX Receive ERR after EOR-EOM transmission during ECM Tx...
  • Page 79 MultiPASS C755 Chapter 3: Maintenance & Service d) Recovery methods for codes indicated as “New” Note, however, the following supplementary information, as the machine requires different actions than the existing models to correct: ##085 Other party does not support ITU-T Color Faxing Solution: (1) Try sending again in black &...
  • Page 80 MultiPASS C755 Chapter 3: Maintenance & Service ##674 [TX] The protocol did not move from phase 3 to phase 4 and a T1 time-out occurred during V.34 transmission. Cause: The called party disconnected the line during phase 3 or the signal from the called party was not able to be detected.
  • Page 81 MultiPASS C755 Chapter 3: Maintenance & Service 4.3 Errors not Shown on the Display 4.3.1 General errors • The unit does not power on. (1) Check the power cord connection. (2) Check the connection between the PCNT board (J204) and power supply unit.

  • Page 82: Printing Problems

    MultiPASS C755 Chapter 3: Maintenance & Service 4.3.2 Printing problems • Faulty printing (Evaluation criteria: Test print is no good.) • The paper is not fed properly. (Evaluation criteria: Look at the actual unit.) The Paper feed motor does not run.
  • Page 83 MultiPASS C755 Chapter 3: Maintenance & Service • Printing quality error • The printer does not at all. • Printing stops midway. • Certain colors are not printed. (1) Check that the orange cap or tape is not on the BJ cartridge.

  • Page 84: Scanning Problems

    MultiPASS C755 Chapter 3: Maintenance & Service 4.3.3 Scanning problems • Faulty scanning (Evaluation criteria: Test print is good, but the copied image is no good.) • The document is not fed. The document feed motor does not run. (Evaluation criteria: Check it visually.) (1) Check the connection from the document feed motor to the SCNT board (JMOTOR1).
  • Page 85 MultiPASS C755 Chapter 3: Maintenance & Service • The scanning image is abnormal. (Evaluation criteria: Check the copy image's faults.) Nothing is printed. (1) Check the connection between the contact sensor and SCNT board (JCS1). (2) Clean the white sheet.
  • Page 86 MultiPASS C755 Chapter 3: Maintenance & Service 4.4 Processing Communication Problems 4.4.1 Initial identification of problems Since the facsimile must transmit picture information, a transmitter, a receiver and telephone lines are required for this purpose. Transmissions may cause problems if one or more of the three is poor.

  • Page 87: Procedures For Processing Communication Problems

    MultiPASS C755 Chapter 3: Maintenance & Service 4.4.2 Procedures for processing communication problems If the problem proves to be communication trouble, deal with it according to the following procedures. (1) Study the conditions at the time of trouble as closely as possible.
  • Page 88 MultiPASS C755 Chapter 3: Maintenance & Service • Procedures for processing communication problems with the Canon facsimile The process for carrying out communications at three points as shown in the figure. Trouble FAX:A FAX:B FAX:C Start A: Your customer's facsimile B: Facsimile of other communication party C: Facsimile for check in the same region.
  • Page 89 MultiPASS C755 Chapter 3: Maintenance & Service • Procedures for processing communication problems with other manufacturer’s facsimiles When problems occur with other manufacturer’s facsimiles, make the user of the other party’s facsimile call the serviceman in charge. Perform communication at the four points listed in the figure.

  • Page 90: Fax/Tel Switching

    MultiPASS C755 Chapter 3: Maintenance & Service 5. COMMUNICATION SYSTEM OPERATIONS 5.1 FAX/TEL Switching This fax is set to automatically switch between fax and telephone, on the same telephone line. If the other party is a fax, the fax is received automatically, and if the other party is a telephone, the alarm in the main unit is rung to alert the user.

  • Page 91: Answering Machine Connection

    MultiPASS C755 Chapter 3: Maintenance & Service 5.2 Answering Machine Connection This connection is for effective use of an answering machine connected to the extension phone jack. If the other party is a telephone, the answering telephone records the message, and if the other party is a fax, the fax receives automatically.

  • Page 92: Operations Where Other Machine Does Not Have Color Communications Ability

    MultiPASS C755 Chapter 3: Maintenance & Service 5.4 Operations Where Other Machine Does not Have Color Communications Ability When sending a color FAX where the other machine does not have color communications ability, this machine informs the user by displaying "TRY AGAIN IN B/W" (#085).

  • Page 93: Specifications For Color Communications

    MultiPASS C755 Chapter 3: Maintenance & Service 5.6 Specifications for Color Communications The operations for color communications shown below are specifications, so please take care when fielding questions from users. Transmission Specifications · Even if the Color/B&W button is pressed and the display changed between pages during transmission, pages of BW images and pages of Color images cannot be mixed.

  • Page 94: Hardware Switches

    MultiPASS C755 Chapter 3: Maintenance & Service 6. SERVICE SWITCHES 6.1 Hardware Switches There is no service hardware switch on the Circuit board. 6.2 Service Data Setting Service data can be checked and changed with items on display menus. The default values of the SSSW/ parameters available in this fax machine are shown in this Chapter, 6.2.3 Service data setting in this...

  • Page 95: Service Data Registration/Setting Method

    MultiPASS C755 Chapter 3: Maintenance & Service #8 CLEAR (Data initialization mode) Various data are initialized by selecting one of these setting items. There is a setting item for checking/ inputting the total number of pages printed and total number of pages scanned by this fax.

  • Page 96: Service Data Setting

    MultiPASS C755 Chapter 3: Maintenance & Service 6.2.3 Service data setting Service data #1 SSSW Error management SW01 – – – (Service soft switch setting) Not used SW02 – – – – – – – – Echo solution setting SW03 –...
  • Page 97 MultiPASS C755 Chapter 3: Maintenance & Service #2 MENU Not used (Menu switch settings) Not used Not used Not used NL equalizer setting DIAL Line monitor setting SERVICEMAN Transmission level setting 10 (-10dBm) (8~15) 3429 (baud) V.34 Baud rate 3200...
  • Page 98 MultiPASS C755 Chapter 3: Maintenance & Service #3 NUMERIC Param. (Numeric parameter settings) Default Range Not used 10 (10%) (1~99) RTN signal transmission condition (1) 15 (15 lines) (2~99) RTN signal transmission condition (2) 12 (12 times) (1~99) RTN signal transmission condition (3)
  • Page 99 MultiPASS C755 Chapter 3: Maintenance & Service #3 NUMERIC PARAM. (Numeric parameter settings) The relationship between the settings and the detection levels is as follows: Parameter 24 NOTE 0: Not used 1: Not used 2: Not used 3: Not used...
  • Page 100 MultiPASS C755 Chapter 3: Maintenance & Service #4 NCU TONE/PULSE (NCU settings) DIAL TONE 2nd DIAL TONE BUSY TONE 0 BUSY TONE 1 REORDER TONE MULTI AUTO RX CNG DETECT SPECIAL RKEY PBX DIAL TONE PBX BUSY TONE U.S.A #5 TYPE...
  • Page 101 MultiPASS C755 Chapter 3: Maintenance & Service 1. SSSW #7 PRINTER (Printer function settings) Not used SW01 – – – – – – – – SW02 – – – – – – – – Not used SW03 – – –...
  • Page 102 MultiPASS C755 Chapter 3: Maintenance & Service Dialling data initialization #8 CLEAR (Data initialization mode USER SW User data and service data #1 to #3 settings) initialization SERVICE SW User data and service data #1 to #3 and #6 to #7 initialization...
  • Page 103 MultiPASS C755 Chapter 3: Maintenance & Service 6.2.4 Explanation of service data a) SSSW (Service Soft Switch settings) The items registered and set by each of these switches comprise 8-bit switches. The figure below shows which numbers are assigned to which bits. Each bit has a value of either 0 or 1.

  • Page 104: New Sssws/Parameters Added To This Model

    MultiPASS C755 Chapter 3: Maintenance & Service 6.2.5 New SSSWs/parameters added to this model #1 SSSW (service soft switch setting) SW01 (service soft switch 01: error management) Function Service error code Output Not output Error dump list Output Not output...
  • Page 105 MultiPASS C755 Chapter 3: Maintenance & Service [Bit 3] Select whether to declare the V.8 protocol in DIS signal for reception (mainly caller manual transmission). If NO is selected, the V.8 protocol cannot be used because it is not declared in DIS signal.
  • Page 106 MultiPASS C755 Chapter 3: Maintenance & Service #3 NUMERIC PARAM (numeric parameter settings) Function Selecting range Default setting T0 Timer 0~9999 5500 (55 second) T1 Timer (Rx) 0~9999 3500 (35 second) Maximum time to receive 500~3000 1300 (13 second) one line of image data [Parameter 10] The "wait time after transmission of a dialing signal ends until a significant signal is detected in...
  • Page 107 MultiPASS C755 Chapter 3: Maintenance & Service #7 PRINTER (printer function settings) 2. NUMERIC PARAM. Function Selecting range Default setting Trailing edge margin 0 ~ 9999 7 ( 7 mm) for black&white copy & FAX Trailing edge margin 0 ~ 9999 26 ( 26 mm) for color copy &...

  • Page 108: User Test Print Functions

    MultiPASS C755 Chapter 3: Maintenance & Service 7. TEST FUNCTIONS 7.1 User Test Print Functions User enabled Test print functions are as follow. 7.1.1 Nozzle check Execute cleaning if this test printing shows each nozzle condition such as no ejection, unclear or unstable etc.

  • Page 109: Service Test Functions

    MultiPASS C755 Chapter 3: Maintenance & Service 7.2 Service Test Functions The fax functions for testing individual operations, such as below. See Page 3-44 for details of entering the test mode. To leave the test mode, press the Function button, and then Clear button.
  • Page 110 MultiPASS C755 Chapter 3: Maintenance & Service 7.2.2 Test mode flowchart TEST MODE ‘ ’ indicates that these items are not used in the field. [1] D-RAM See Page 3-61 [2] CS See Page 3-61 [1] ADJ LED TIME [2] CS READ...
  • Page 111 MultiPASS C755 Chapter 3: Maintenance & Service [6] FACULTY TEST [1] G3 4800bps Tx [2] REGISTRATION [3] SENSOR See Page 3-67 [4] ADF [5] Not used [6] SPEAKER [7] PANEL See Page 3-69 [8] Not used [9] LINE DETECT 1–4...

  • Page 112: D-Ram Tests

    MultiPASS C755 Chapter 3: Maintenance & Service 7.2.3 D-RAM tests Pressing the 1 button from the test mode menu selects the D-RAM tests. D-RAM Test 1 writes data to the entire D-RAM region and reads it out to check that operations are correct. D-RAM Test 2 just reads data at high speed.

  • Page 113: Print Test

    MultiPASS C755 Chapter 3: Maintenance & Service 7.2.5 PRINT test Pressing the 3 button from the test mode menu selects the print test. This test prints various patterns. For servicing, use the 3-7: CHECKERS pattern (press the 7 button from the print test menu). The other patterns are not to be used since they are for development and factory personnel.
  • Page 114 MultiPASS C755 Chapter 3: Maintenance & Service Figure 3-31 Print Pattern Sample 3-63...

  • Page 115: Modem And Ncu Tests

    MultiPASS C755 Chapter 3: Maintenance & Service 7.2.6 Modem and NCU tests These tests test modem and NCU transmission and reception. The modem tests check whether signals are sent correctly from the modem by comparing the sound of the signals from the speaker with the sounds from a normal modem.
  • Page 116 MultiPASS C755 Chapter 3: Maintenance & Service b) G3 signal transmission test The G3 signal transmission test menu is selected by pressing the 4 button from the MODEM NCU test menu. The G3 signals below are sent from the modem using the modular jack and the speaker. The frequency can be changed with the numeric buttons.
  • Page 117 MultiPASS C755 Chapter 3: Maintenance & Service c) V.34 G3 signal transmission test The V.34 G3 signal transmision test menu is selected by pressing the 8 key from the MODEM NCU test menu. The V.34 G3 signals below are sent from the modem using the modular jack and the speaker by pressing the start key.

  • Page 118: Faculty Tests

    MultiPASS C755 Chapter 3: Maintenance & Service 7.2.7 Faculty tests The faculty tests are selected by pressing the 6 button from the test mode menu. These tests test the following faculties of this fax. Test type Overview Sensor tests Test whether the sensors are operating correctly.
  • Page 119 MultiPASS C755 Chapter 3: Maintenance & Service 6-3 : SENSOR Alternately Pressing the 1 key. displayed D S of D E S of DS: Document sensor DES: Document edge sensor on/off : decument/no document Figure 3-32 Sensor Tests 3-68...
  • Page 120 MultiPASS C755 Chapter 3: Maintenance & Service b) Operation panel tests The operation panel test is selected by pressing the 7 button from the faculty test menu. In this test, check that the display, LED lamps, and buttons on the control panel are operating correctly.
  • Page 121 MultiPASS C755 Chapter 3: Maintenance & Service 6-7:OPERATION PA Press Start button. H pattern displayed HHHHHHHHHHHHHHHH Press Start button. All LCD dots displayed Press Start button. All LED lamps light up. LED TEST Press Start button. When a button is pressed, the 1 2 3 4 5 6 7 8 9 corresponding character goes out.
  • Page 122 MultiPASS C755 Chapter 3: Maintenance & Service c) Line signal reception test The line detect test menu is selected by pressing the 9 button from the faculty test menu. This test checks the operation of the NCU signal sensor and frequency counter. In Menu 1, the CI, status can be detected and in Menu 2 the frequency can be detected at changing detection levels.

  • Page 123: Printer Test

    MultiPASS C755 Chapter 3: Maintenance & Service 7.2.8 Printer test Press key “8” on the keypad in the test mode menu, and select Printer test. After that, select “1.” When this function is selected, the printer scans the carriage and detects the presence/absence of ink. It then prints the results.
  • Page 124 MultiPASS C755 Chapter 3: Maintenance & Service 8. SERVICE REPORT 8.1 Report Output Function 8.1.1 User report output functions The fax can output user reports manually by user operation, or automatically, according to user data settings. a) Manual output of reports by user operation...
  • Page 125 MultiPASS C755 Chapter 3: Maintenance & Service c) Reports output automatically Memory clear report The fax automatically outputs a memory clear report when the power is turned on after a power cut. Figure 3-35 Memory Clear List TX/RX NO : Indicates four digits of the transaction number MODE : Indicates, TRANSMIT, or AUTO RX or B’CAST (Broadcast) and COL...

  • Page 126: Service Report Output Functions

    MultiPASS C755 Chapter 3: Maintenance & Service 8.1.2 Service report output functions The fax outputs service data setting status, past communications history reports. a) List of service reports The fax outputs the service reports shown below. Report type Operations 1. System data list In the service mode, press the Report button then select the report 2.
  • Page 127 MultiPASS C755 Chapter 3: Maintenance & Service a-1) System data list This list shows service data #1~#5, #7, #9 setting statuses. The following is a sumple list. Figure 3-36 System Data List (page 1 ~ page 4) 3-76...
  • Page 128 MultiPASS C755 Chapter 3: Maintenance & Service Figure 3-37 System Data List (page 5 ~ page 6) “START DATE” records the date when the fax performs its first transmission, after shipment from the factory. NOTE 3-77...
  • Page 129 MultiPASS C755 Chapter 3: Maintenance & Service a-2) System dump list This list shows the past communications statuses and error communications history. The following is a sample list. Figure 3-38 System Dump List (1/2) 3-78...
  • Page 130 MultiPASS C755 Chapter 3: Maintenance & Service CLEAR DATE : Date on which data was initialized with service data #8 CLEAR, RX/TX : Total number of receptions/transmissions A4/B4/A3/LTR/LGL : Total number of pages transmitted and received for each document size...
  • Page 131 MultiPASS C755 Chapter 3: Maintenance & Service Figure 3-39 System Dump List (2/2) ##nnn : Service error code START TIME : Communication start date and time (on 24 hour clock) OTHER PARTY : Telephone number sent from other party MAKER CODE...
  • Page 132 (OTHER PARTY) SUBADDRESS : Subaddress number sent from the other party CONNECTION ID : ID sent from the other party, if the other party is a Canon fax START TIME : Communication start date and time (on 24-hour display) USAGE TIME...
  • Page 133 (lower 20 digits) SUBADDRESS : Subaddress number sent from the other party CONNECTION ID : ID sent from the other party, if the other party is a Canon fax START TIME : Communication start date time (on 24-hour display) USAGE TIME...

  • Page 134: Wiring Diagram

    MultiPASS C755 Chapter 3: Maintenance & Service 9. WIRING DIAGRAM 9.1 Wiring Diagram Document Operation sensor panel Document edge sensor to PCNT board Color Contact sensor Flat J201 cable Flat Flat cable cable Document 1- - - - - - - - - - - -32...
  • Page 135 MultiPASS C755 Chapter 3: Maintenance & Service 10. BLOCK DIAGRAM 10.1 Block Diagram 16M bit (IC201) SRAM 256K bit (IC202) controller (IC901) MPU&Printer controler (IC101) (IC101) Figure 3-43 Block Diagram 3-84...

  • Page 136: Circuit Board Components

    MultiPASS C755 Chapter 3: Maintenance & Service 10.2 Circuit Board Components a) System control section The system controller is made up of the following components, and controls the entire fax system. This section drive +3.3V voltage from power supply unit.
  • Page 137 MultiPASS C755 Chapter 3: Maintenance & Service a-4) Main ROM (IC201) This 8 Mbit ROM contains the control programs (e.g. operation panel, scanner and communications section etc.) for this fax. a-5) SRAM (IC 202) This 256 Kbit SRAM is backed up by lithium battery. SRAM holds data registered for system control and communications management information.
  • Page 138 MultiPASS C755 Chapter 3: Maintenance & Service d) Printer control section d-1) MPU&Printer controller (IC 101) The main functions of the printer controller are as follows: • Bi-centronics interface • EEP-ROM control • DRAM control • Buffer control • Print head control Also, the printer controller include MPU function are as follows: •...
  • Page 139 MultiPASS C755 Chapter 3: Maintenance & Service This page intentionally left blank. 3-88...
  • Page 140 MultiPASS C755 Chapter 4: Appendix 1. USER DATA FLOW 1.1 User Data Flow (by Operation Panel) Press the Function button, then press the Data Registration button. Function button + Data Registration button DATA REGISTRATION 1. USER SETTINGS DATE & TIME...
  • Page 141 MultiPASS C755 Chapter 4: Appendix 2. REPORT SETTINGS TX REPORT PRINT ERROR ONLY PRINT WITH IMAGE OUTPUT YES PRINT WITH IMAGE OUTPUT NO RX REPORT PRINT ERROR ONLY OUTPUT YES OUTPUT NO ACTIVITY REPORT AUTO PRINT 3. TX SETTINGS ECM TX MID PAUSE SET 02 SEC.
  • Page 142 MultiPASS C755 Chapter 4: Appendix FAX/TEL AUTO SW RING START TIME 08 SEC. (00~30 SEC.) F/T RING TIME 15 SEC. (10~45 SEC.) DEFAULT ACTION RECEIVE DISCONNECT INCOMING RING 02 TIMES (01~99 TIMES) MAN/AUTO SWITCH 15 SEC. (01~99 SEC.) REMOTE RX...

  • Page 143: User Data Flow (By Multipass Suite)

    MultiPASS C755 Chapter 4: Appendix 6. SYSTEM SETTINGS DATE SETUP MM/DD/YYYY DD/MM YYYY YYYY MM/DD DISPLAY LANGUAGE ENGLISH FRENCH SPANISH TX START SPEED 33600 bps 14400 bps 9600 bps 7200 bps 4800 bps 2400 bps RX START SPEED 33600 bps...

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