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Oki ML8480FB Maintenance Manual
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Oki ML8480FB Maintenance Manual

Oki ML8480FB Maintenance Manual

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ML8480FB
Maintenance Manual
032207C
Oki Data CONFIDENTIAL

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Summary of Contents for Oki ML8480FB

  • Page 1 ML8480FB Maintenance Manual 032207C Oki Data CONFIDENTIAL...
  • Page 2 Oki Data CONFIDENTIAL Document Revision History Corrected items Person in Rev.No. Date charge Page Description of change 2005-04-22 ISSUE ODS Takahashi 2006-11-20 For RoHS ODS M.Kanno 41829406TH Rev.2...
  • Page 3 Oki Data CONFIDENTIAL Preface This service manual provides on-site maintenance procedures for the MICROLINE 8480FB for field service engineers. For handling and operation of the printer, see the operations manual. CAUTION: • No part of this manual may be reproduced in any form without prior permission.
  • Page 4 Oki Data CONFIDENTIAL Contents 1. Configuration ........................7 Standard Components ........................7 Optional Components ........................7 2. Periodic Inspection ......................8 Inspection Areas ..........................8 3. Periodic Replacement Parts .................... 9 4. Cleaning ........................10 Cleaning of Sensors ........................12 5. Lubricating ........................13 6.
  • Page 5 Oki Data CONFIDENTIAL 7.2.28 Cover Open Assembly ......................48 7.2.29 CSF Board .......................... 49 7.2.30 Removing the Printer Unit ....................50 7.2.31 S/C Board ........................... 52 7.2.32 Rear PE-Sensor Assembly / Rear PE Sensor (Mechanical) ..........53 7.2.33 Head-Cable Assembly ......................54 7.2.34 Continuous-Form Sensor ....................
  • Page 6 Oki Data CONFIDENTIAL 10.2.9 Parallel-Interface Error .....................124 10.2.10USB Interface Error ......................125 10.2.11Automatic Paper-Thickness Adjustment Motion Error ............126 10.2.12Printing-Position Error ......................127 10.2.13Unrecoverable Errors .......................128 11. Periodically Replaced Parts ..................129 12. Theory of Operation ....................131 12.1 Outline ............................131 12.2 Electrcal Operation (See Figure 12-1.) ..................132 12.2.1 µ...
  • Page 7 Oki Data CONFIDENTIAL 1. Configuration 1.1 Standard Components This printer consists of the components specified below. Upper-cover assembly Printer unit Power-supply unit Upper cover assembly Control unit Operating-panel assembly Lower-base assembly Sheet stacker Operating panel assembly Stacker support Power supply unit...
  • Page 8 Oki Data CONFIDENTIAL 2. Periodic Inspection Conducting the preventive maintenance described below in the specified cycle will help ensure the long and efficient operation of the printer and increase the MTBF (mean time between failure). CAUTION: Turn off the power switch and disconnect the power cord before conducting maintenance work.
  • Page 9 Oki Data CONFIDENTIAL 3. Periodic Replacement Parts The parts below require replacement in the specified cycles. Table 3-1. Periodic Replacement Parts Description Parts No. Replacement cycle [The time (H) is the actual operating hours.] Ribbon cartridge 41708210 6 million ANK characters in draft pica mode...
  • Page 10 Oki Data CONFIDENTIAL 4. Cleaning CAUTION: • Turn off the power switch and disconnect the power cord before cleaning. • Be careful to prevent paper dust from entering the mechanisms of the printer. • After cleaning the lubrication areas, be sure to lubricate them.
  • Page 11 Oki Data CONFIDENTIAL Carriage shaft Front/rear feed rollers (8 locations) ViewB Rear PE sensor ViewA Sheet-guide upper-front-assembly sensor (3 locations) S/C board sensor (11 locations) View A: Bottom View of Printer S/C board Rear PE sensor Sub shaft View B: Rear View of Printer 11 / 41829406TH Rev.2...
  • Page 12 Oki Data CONFIDENTIAL 4.1 Cleaning of Sensors Cleaning of Rear PE Sensor 1 Using a cotton swab, wipe the sensor on the platen side of the upper sheet guide. Clean the surface of the sensor guide. Upper sheet guide Upper sheet guide...
  • Page 13 Oki Data CONFIDENTIAL 5. Lubricating Perform lubrication as specified below. Cycle Lubricate every year or 600 hours of operation, whichever comes first (parts marked * only). Otherwise, this printer is maintenance-free and lubrication will not be necessary during operation. However, when you have conducted disassembly or reassembly, cleaned the lubrication areas, or replaced parts, perform lubrication.
  • Page 14 Oki Data CONFIDENTIAL Lubrication Areas See the illustrations below. Slider felt (*) Adjust-cam surface PM B Sliding area between carriage shaft and collar GEP B (Right/left) GEP B (Right/left) Gear tooth flank GEP B Bearing sliding surface PM B Spring hook...
  • Page 15 Oki Data CONFIDENTIAL Adjust-cam s GEP B Spring hoo Sliding area GEP B GEP B earing sliding s earing sliding s 1locations eac 1locations eac d platen collar Motor-idle gea 15 / 41829406TH Rev.2...
  • Page 16 Oki Data CONFIDENTIAL Sliding area between arm mode and rack Sliding area between stud and rack GEP B GEP B Rack tooth flank Sliding area between side frame and rack GEP B GEP B Mode Rack R Sliding area between arm mode and rack...
  • Page 17 Oki Data CONFIDENTIAL Sliding surface with mode arm GEP B Drive-shaft sliding surface for rotation PM C Drive-shaft sliding surface for rotation PM C Sliding surface with mode arm GEP B Sheet-Guide Upper F/R Assembly Bearing portion of gear GEP C (4 locations)
  • Page 18 Oki Data CONFIDENTIAL 6. Maintenance Tools Table 6-1 shows the tools required for on-site maintenance services, such as replacement of printed circuit boards and other parts. Table 6-1. Maintenance Tools Maintenance tools Quantity Parts for which the tools are used Remarks No.1-100 Phillips screwdriver...
  • Page 19 Oki Data CONFIDENTIAL 7. Replacing Parts 7.1 Precautions in Parts Replacement Turn off the power switch, disconnect the AC plug from the AC outlet, and disconnect the AC cord and the interface cable from the printer before starting disassembly. Risk of electric shock The print head will be hot immediately after printing.
  • Page 20 Oki Data CONFIDENTIAL 7.2 Removing and Installing Parts 7.2.1 Upper-Cover Assembly (1) Remove the stacker 1 and the stacker support 2. (2) Disconnect the AC cord from the printer. Remove the earth screw, if any. CAUTION: If the AC cord is connected to the printer, the upper-cover assembly cannot be removed or installed.
  • Page 21 Oki Data CONFIDENTIAL 7.2.2 Raising and Lowering the Printer Unit Remove the upper-cover assembly (see section 7.2.1). Open the operating panel 1 and remove the four screws 2. Hold the pull and raise the printer unit 3, pivoting it on its back.
  • Page 22 Oki Data CONFIDENTIAL Pull Gasket Set the stand shaft securely. Groove Stand shaft 22 / 41829406TH Rev.2...
  • Page 23 Oki Data CONFIDENTIAL 7.2.3 Control Board Remove the upper-cover assembly (see section 7.2.1). Raise the printer unit (see section 7.2.2). Disconnect all connection cords connected to the control board 1. Remove the five screws 2 and the control board 1.
  • Page 24 Oki Data CONFIDENTIAL 7.2.4 Power-Supply Unit (1) Remove the upper-cover assembly (see section 7.2.1). (2) Raise the printer unit (see section 7.2.2). (3) Disconnect all connectors connected to the power-supply unit 1. (4) Remove the five screws 2. (5) When removing the power-supply unit, disconnect the connectors, pull out the power switch upward from the lower cover 3, and disconnect the cords from the cord route of the lower cover 3.
  • Page 25 Oki Data CONFIDENTIAL 7.2.5 AG Sensor board (1) Remove the upper-cover assembly (see section 7.2.1). (2) Remove the screw 2 and the AG-sensor board assembly 3. Disconnect the connector 1 from the AG-sensor board. (3) Perform installation in the reverse order of removal.
  • Page 26 Oki Data CONFIDENTIAL 7.2.6 AG Motor Assembly Remove the upper-cover assembly (see section 7.2.1). Raise the printer unit (see section 7.2.2). Remove the cable guide 1. Disconnect the connector 3 of the AG motor assembly 2 from the CN16 on the control board 4.
  • Page 27 Oki Data CONFIDENTIAL 7.2.7 LF Motor Assembly Remove the upper-cover assembly (see section 7.2.1). Raise the printer unit (see section 7.2.2). Remove the cable guide 1 and the three screws 2. Remove the sub frame 3 and the bushes 4.
  • Page 28 Oki Data CONFIDENTIAL 7.2.8 Space Motor Remove the upper-cover assembly (see section 7.2.1). Loosen the mounting screw 2 of the idle-pulley bracket 1, slide the screw in the direction indicated by the arrow, and tighten it. Raise the printer unit (see section 7.2.2).
  • Page 29 Oki Data CONFIDENTIAL 7.2.9 Operation Board (1) Remove the upper-cover assembly (see section 7.2.1). (2) Disconnect all connection cords connected to the operation board 1. (3) Release the operating-panel assembly 2 from the catch. (4) Remove the screw 3 and the claws 4 (in 4 locations). Remove the operation board 1 from the operating-panel assembly 2.
  • Page 30 Oki Data CONFIDENTIAL 7.2.10 Starting Up in Gap Fully Open Mode (Replacement of the head/ribbon guide/ribbon protector) (1) While holding down switches 1, 5, and 6 on the operating panel, turn on the power switch to start up in maintenance mode.
  • Page 31 Oki Data CONFIDENTIAL 7.2.11 Ribbon Guide & Head Fan Assembly CAUTION: The print head will be hot immediately after printing. To prevent burns, do not touch it until it cools. Start up in gap fully open mode (see section 7.2.10).
  • Page 32 Oki Data CONFIDENTIAL 7.2.12 Print Head CAUTION: The print head will be hot immediately after printing. To prevent burns, do not touch it until it cools. Be sure to turn off the power switch prior to disassembly. (1) Start up in gap fully open mode (see section 7.2.10).
  • Page 33 Oki Data CONFIDENTIAL 7.2.13 Ribbon Protector CAUTION: The print head will be hot immediately after printing. To prevent burns, do not touch it until it cools. Remove the print head (see section 7.2.12). Remove the two screws 1 and the two paper-width-sensor assemblies 2.
  • Page 34 Oki Data CONFIDENTIAL 7.2.14 Ribbon Feed Assembly Remove the upper-cover assembly (see section 7.2.1). Remove the screws 1 and 2 and the ribbon feed assembly 3. Perform installation in the reverse order of removal. 34 / 41829406TH Rev.2...
  • Page 35 Oki Data CONFIDENTIAL 7.2.15 Ribbon Feed Motor Remove the upper-cover assembly (see section 7.2.1). Raise the printer unit (see section 7.2.2). Remove the purse lock 1. Disconnect the connector 3 from the CN19 on the control board 2. Remove the three guide-plate cables 4.
  • Page 36 Oki Data CONFIDENTIAL 7.2.16 Space Belt Remove the upper-cover assembly (see section 7.2.1). Remove the space motor (see section 7.2.7). Remove the print head (see section 7.2.10). Remove the two screws 1 and the carriage board 2. Remove the screw 3 and the belt clamp 4.
  • Page 37 Oki Data CONFIDENTIAL 7.2.17 Paper Change Sensor Board Remove the upper-cover assembly (see section 7.2.1). Raise the printer unit (see section 7.2.2). Remove the cable guide 1, the three screws 2, the sub frame 3, and then the bushes 4.
  • Page 38 Oki Data CONFIDENTIAL 7.2.18 Platen (1) Remove the upper-cover assembly (see section 7.2.1). (2) Raise the printer unit (see section 7.2.2). (3) Remove the three screws 1, the sub frame 2, and then the bushes 3. Be careful not to lose the coil spring 4.
  • Page 39 Oki Data CONFIDENTIAL 7.2.19 Paper Change Selector Motor Remove the upper-cover assembly (see section 7.2.1). Raise the printer unit (see section 7.2.2). Disconnect the connector 2 from the CN17 on the control board 1. Remove the two screws 3 and the paper change selector motor 4.
  • Page 40 Oki Data CONFIDENTIAL 7.2.20 EI Sensor Assembly CAUTION: The print head will be hot immediately after printing. To prevent burns, do not touch it until it cools (1) Remove the head fan assembly, the ribbon guide, and then the print head (see section 7.2.12).
  • Page 41 Oki Data CONFIDENTIAL 7.2.21 Paper-Width-Sensor Assembly CAUTION: The print head will be hot immediately after printing. To prevent burns, do not touch it until it cools Remove the head fan assembly, the ribbon guide, and then the print head (see section 7.2.12).
  • Page 42 Oki Data CONFIDENTIAL 7.2.22 LCD Bracket Assembly Remove the upper-cover assembly (see section 7.2.1). Disconnect the connector 2 from the CN2 on the operation board 1. Tilt the LCD bracket assembly 3 forward and downward. Remove the two screws 4 and the LCD bracket assembly 3.
  • Page 43 Oki Data CONFIDENTIAL 7.2.23 Sheet-Guide Upper Front Assembly Remove the upper-cover assembly (see section 7.2.1). Remove the LCD bracket assembly (see section 7.2.22). Raise the printer unit (see section 7.2.2). Remove the cable guide 1, and disconnect the connector from the S/C board 2.
  • Page 44 Oki Data CONFIDENTIAL 7.2.24 Mini Pitch Belt (LF) (1) Remove the upper-cover assembly (see section 7.2.1.) (2) Remove the sheet guide upper front assembly (see section 7.2.23). (3) Remove the cable guide 1, the three screws 2, the sub frame 3, the bushes 4, and then the flange 5.
  • Page 45 Oki Data CONFIDENTIAL 7.2.25 S/C Motor Assembly Remove the upper-cover assembly (see section 7.2.1). Remove the sheet-guide upper front assembly (see section 7.2.23). Remove the mini pitch belt LF (see section 7.2.24). Disconnect the connector 1 from the S/C board 2.
  • Page 46 Oki Data CONFIDENTIAL 7.2.26 Carriage Board CAUTION: The print head will be hot immediately after printing. To prevent burns, do not touch it until it cools. Remove the print head (see section 7.2.12). Remove the two screws 1 and the carriage board 2.
  • Page 47 Oki Data CONFIDENTIAL 7.2.27 Head Connector CAUTION: The print head will be hot immediately after printing. To prevent burns, do not touch it until it cools. Remove the print head (see section 7.2.12). Remove the carriage board (see section 7.2.26).
  • Page 48 Oki Data CONFIDENTIAL 7.2.28 Cover Open Assembly Remove the upper-cover assembly (see section 7.2.1). Raise the printer unit (see section 7.2.2). Disconnect the connector 2 from the CN3 on the operation board 1. Disconnect connectors 4 and 5 from the CN100 and the CN400 on the control board 3.
  • Page 49 Oki Data CONFIDENTIAL 7.2.29 CSF Circuit Board Remove the upper-cover assembly (see section 7.2.1). Raise the printer unit (see section 7.2.2). Disconnect the flat cable connected to the CSF board 1. Remove the four screws 2. Perform installation in the reverse order of removal.
  • Page 50 Oki Data CONFIDENTIAL 7.2.30 Removing the Printer Unit Remove the upper-cover assembly (see section 7.2.1). Remove the two screws 2 fastening the front of the printer unit 1. Remove the two screws 3 fastening the rear of the printer unit 1.
  • Page 51 Oki Data CONFIDENTIAL 51 / 41829406TH Rev.2...
  • Page 52 Oki Data CONFIDENTIAL 7.2.31 S/C Board Remove the upper-cover assembly (see section 7.2.1). Remove the printer unit (see section 7.2.30). Place the printer unit 1 upright. Remove the four screws 2 and the film guard (sc) 3. Disconnect connectors 4, 5, and 6.
  • Page 53 Oki Data CONFIDENTIAL 7.2.32 Rear PE-Sensor Assembly / Rear PE Sensor (Mechanical) Remove the upper-cover assembly (see section 7.2.1). Remove the printer unit (see section 7.2.21). Place the printer unit 1 in the upright position. Disconnect connectors 3 and 4 from the CN5 and the CN20 on the control board 2.
  • Page 54 Oki Data CONFIDENTIAL 7.2.33 Head-Cable Assembly (1) Remove the upper-cover assembly (see section 7.2.1). CAUTION: The print head will be hot immediately after printing. To prevent burns, do not touch it until it cools. (2) Remove the print head (see section 7.2.12).
  • Page 55 Oki Data CONFIDENTIAL 7.2.34 Continuous-Form Sensor (1) Remove the upper-cover assembly (see section 7.2.1). (2) Raise the printer unit (see section 7.2.2). (3) Disconnect the connector 2 from the continuous-form sensor 1. (4) Press the lock of the continuous-form sensor 1 inward from the rear of the frame 3 to remove the continuous-form sensor 1.
  • Page 56 Oki Data CONFIDENTIAL 7.2.35 Slip-Roller Sensor Remove the upper-cover assembly (see section 7.2.1). Raise the printer unit (see section 7.2.2). Remove the screw 1 and the position-sensor bracket 2. Disconnect the connector 4 from the slip-roller sensor 3. Press the lock of the slip-roller sensor 3 inward from the rear of the position-sensor bracket 2 to remove the slip-roller sensor 3.
  • Page 57 Oki Data CONFIDENTIAL 7.2.36 Slider Remove the upper cover (see section 7.2.1). Remove the screw 2 from the carriage frame 1, and then remove the holder slider 3. Be careful not to lose the coil spring 4 in the holder slider 3, as it may come off easily.
  • Page 58 Oki Data CONFIDENTIAL 8. Adjusting • Leave the printer unit fastened to the lower cover when making adjustments. • To minimize deviation in adjustment, place the printer on a rigid assembly bench (flatness of 1 mm or less) and keep it level while conducting your work.
  • Page 59 Oki Data CONFIDENTIAL 8.1 Adjusting the Line-Feed Belt Tools • 500-gr pressure bar gauge • No. 2-200 Phillips screwdriver • Vernier calipers Adjustment Procedure Turn off the power switch, and disconnect the AC plug from the AC outlet. Remove the upper-cover assembly (see section 7.2.1).
  • Page 60 Oki Data CONFIDENTIAL 8.2 Checking the Gap between the Platen and Core Block Turn on the power while holding down switches 1, 5, and 6 to start up in maintenance mode. While holding down the switch 6, press the switch 1. The gap between the print head and the platen is set to range 1, and you can check the gap between the platen and the core block for automatic paper-thickness adjustment.
  • Page 61 Oki Data CONFIDENTIAL 8.3 Correcting the Automatic Paper-Thickness Adjustment Distance Turn on the power while holding down switches 1, 5, and 6 to start up in maintenance mode. While holding down the switch 6, press the switch 5. The automatic paper-thickness adjustment distance is automatically corrected.
  • Page 62 Oki Data CONFIDENTIAL When the operations have been completed, the printer prints [AV. = “correction value”] and automatically calculates the average of the 15 measurements. The calculation result is registered as the reference value for automatic paper-thickness adjustment. It is desirable that the value of [AV. = “ “] be within the range of 009 to 032.
  • Page 63 Oki Data CONFIDENTIAL 8.4 Correcting the TOF Position during Auto Loading The TOF (top of form) position of a continuous form or cut sheet during auto loading is corrected using the switches on the operating panel in accordance with the procedure specified below.
  • Page 64 Oki Data CONFIDENTIAL Press the switch 3 while offline, and install paper by auto loading. Continue to hold down the switch 3 after the auto loading has been completed. While holding down the switch 3, use switches 2 and 5 to correct the TOF position.
  • Page 65 Oki Data CONFIDENTIAL 8.5 Adjusting the Paper Cut Position By operating the switches on the operating panel in accordance with the procedure specified below, the paper cut position is adjusted so as to match separate continuous forms at their perforation.
  • Page 66 Oki Data CONFIDENTIAL When the leading edge of the paper is aligned with the paper cut position, release the switch. The paper position at the time the switch is released is registered as the new paper cut position. CAUTION: • The adjustment range is from +200/120 to –40/120 inches.
  • Page 67 Oki Data CONFIDENTIAL 8.6 Correcting the Horizontal Printing Position When the settings in the adjustment-mode menu (section 9.2.2).are changed by the procedure specified below, horizontal offsets between lines in bidirectional printing are corrected. The correction value is separately adjustable for each print mode: low speed, normal speed, high speed 1, and high speed 2.
  • Page 68 Oki Data CONFIDENTIAL 8.7 Correcting the Cut-Sheet Line-Feed Pitch When the setting in the adjustment-mode menu (section 9.2.2).is changed in accordance with the following procedure, the cut-sheet line-feed pitches for manual feed and CSF are corrected. Cases in which correction is required •...
  • Page 69 Oki Data CONFIDENTIAL 8.8 Adjusting Sensors 8.8.1 Checking the Slice Level of Sensors Turn on the power while holding down switches 1, 5, and 6 to start up in maintenance mode. While holding down the switch 3, press the switch 5. The detection level of each sensor is automatically adjusted to determine whether the level is normal.
  • Page 70 Oki Data CONFIDENTIAL 8.8.2 Sensor Check Turn on the power while holding down switches 1, 5, and 6 to start up in maintenance mode. While holding down the switch 3, press the switch 1. The printer checks to determine whether each sensor is operating properly.
  • Page 71 Oki Data CONFIDENTIAL 8.8.3 Correcting the Paper-Width Sensor Turn on the power while holding down switches 1, 5, and 6 to start up in maintenance mode. While holding down the switch 1, press the switch 4. The horizontal positions of the right- and left-hand paper-width sensors are automatically adjusted.
  • Page 72 Oki Data CONFIDENTIAL 8.8.4 Correcting the Front PE Sensor Turn on the power while holding down switches 1, 5, and 6 to start up in maintenance mode. While holding down the switch 1, press the switch 6. The vertical positions of the seven front PE sensors are automatically adjusted.
  • Page 73 Oki Data CONFIDENTIAL 8.8.5 Manual Setting of the Sensor Slice Level Turn on the power while holding down switches 1, 5, and 6 to start up in maintenance mode. While holding down the switch 3, press the switch 2. The slice level of each sensor is viewed on the LCD and set manually (seven levels [1 to 7] are available).
  • Page 74 Oki Data CONFIDENTIAL <Setting Item> Item Function Preset Table Sensor 1 to 7 Sets the slice level of table sensors 1 to 7 Level 1 Level 2 Level 3 Level 4 Level 5 Level 6 Level 7 ↑ Front PE Sensor 1 to 7 Sets the slice level of front TOF/PE sensors 1 to 7 ↑...
  • Page 75 Oki Data CONFIDENTIAL 9. Maintenance Test 9.1 Selecting Test Mode 9.1.1 Local Mode Start Switch The switches on the operating panel have the functions as shown in Table 9-1 for various tests for maintenance. When the power is turned on while a switch marked with is held down, the printer enters the mode shown in Table 9-1.
  • Page 76 Oki Data CONFIDENTIAL Table 9-1. Local test (2/3) Switch Test Item Paper mode Remarks 1 1 1 1 1 2 2 2 2 2 3 3 3 3 3 4 4 4 4 4 5 5 5 5 5 6 6 6 6 6...
  • Page 77 Oki Data CONFIDENTIAL 9.2 Menu This printer has the internal memory necessary to store the control-mode data. When returned to the default settings by power-on operation or reset-signal input, the printer refers to the memory and automatically sets up the modes. If commands have been input from the host computer, the printer operates according to these commands.
  • Page 78 Oki Data CONFIDENTIAL 9.2.1 Function Setting Menu With a printer placed in the DESELECT state after it is turned on, pressing 4 switch while holding 6 down provides a function setting menu, on the printer. The function setting menu consists of the following 12 modes, and the mode 1) is established directly after the function setting menu is provided.
  • Page 79 Oki Data CONFIDENTIAL (1) Printer Control Underlined values are defaults. Item (LCD Display) Function Setting(s) (LCD Display) Emulation Mode Selects EPSON LQ mode, IBM PPR mode , EPSON LQ IBM AGM mode or Diablo mode. IBM PPR IBM AGM Diablo (2) Font Underlined values are defaults.
  • Page 80 Oki Data CONFIDENTIAL Underlined values are defaults. Item (LCD Display) Function Setting(s) (LCD Display) Language Set Selects a foreign character set. American French German British Danish I Swedish Italian Spanish I Japanese Norwegian Danish II Spanish II Latin American French Canadian...
  • Page 81 Oki Data CONFIDENTIAL Command Fnc. Underlined values are defaults. Item (LCD Display) Function Setting(s) (LCD Display) Auto LF Selects behavior at CR (carriage return) code reception. Auto CR Selects behavior of carriage return (CR) system commands (whether to include CR) (this item is displayed only during IBM emulation).
  • Page 82 Oki Data CONFIDENTIAL (4) Set up Underlined values are defaults. Item (LCD Display) Function Setting(s) (LCD Display) Multi Pass Selects a printing direction for a print line Bi-Directional containing double-height print data. Uni-Directional Graphics Selects a printing direction for a print line Bi-Directional containing image data.
  • Page 83 Oki Data CONFIDENTIAL (5) Hardware Underlined values are defaults. Item (LCD Display) Function Setting(s) (LCD Display) Rcv. Buffer Selects whether to use a receive buffer. 128K Path Change Selects whether to perform continuous-form Not Tear Off paper cut operation at media switching.
  • Page 84 Oki Data CONFIDENTIAL Underlined values are defaults. Item (LCD Display) Function Setting(s) (LCD Display) Buzzer Volume Selects a buzzer beeping volume. Middle High Power Saving Selects whether to enable a power saving Enable function. Disable Power Save Time Selects the time to a power saving state.
  • Page 85 Oki Data CONFIDENTIAL Form Select Underlined values are defaults. Item (LCD Display) Function Setting(s) (LCD Display) Line Spacing Selects line spacing. 6LPI 8LPI PageLeng.Select Selects a page length. 279.4mm (11") A fixed page length of 558.8 mm (22 inches) 304.8mm (12") is used for auto cut-sheet feed modes.
  • Page 86 Oki Data CONFIDENTIAL (Note 1) a) CSF The settings for TOF, Eject Dir., Gap Control and Gap Pos conform to those in an applicable auto feed mode. The correction amounts for TOF Adj., PE Adj., 1st DotAdj And LF Revise conform to those in an applicable manual feed mode.
  • Page 87 Oki Data CONFIDENTIAL Manual Feed Underlined values are defaults. Item (LCD Display) Function Setting(s) (LCD Display) Selects a basic top-of-form position in 2.12mm (1/12”) Note 1) manual cut-sheet feed modes <the vertical 3.18mm (1/8”) center of the first print (character) line of 6.35mm (1/4”)
  • Page 88 Oki Data CONFIDENTIAL Underlined values are defaults. Item (LCD Display) Function Setting(s) (LCD Display) Auto Align(POW) Selects whether to enable, at printer’s power- Align1 on, a skew adjustment mechanism and a left Align2 margin. Align3 Align1: Selects enabling skew adjustment Align4 and Align1 Pos.Adj.
  • Page 89 Oki Data CONFIDENTIAL Underlined values are defaults. Item (LCD Display) Function Setting(s) (LCD Display) Align4 Pos.Adj. Adjusts within a range of 0 to 45.4 mm a left 0mm: margin when a Auto Align function is used (in (1/90 inch increments) 1/90 inch increments).
  • Page 90 Oki Data CONFIDENTIAL CSF front Underlined values are defaults. Item (LCD Display) Function Setting(s) (LCD Display) Selects a basic top-of-form position in the 2.12mm (1/12") auto feed mode for cut sheets <the vertical 3.18mm (1/8”) Note 1) center of the first print (character) line of 6.35mm (1/4")
  • Page 91 Oki Data CONFIDENTIAL CSF Rear Underlined values are defaults. Item (LCD Display) Function Setting(s) (LCD Display) Selects a basic top-of-form position in the 2.12mm (1/12") Note 1) auto feed mode for cut sheets <the vertical 3.18mm (1/8”) center of the first print (character) line of 6.35mm (1/4")
  • Page 92 Oki Data CONFIDENTIAL Note 1) 1Chr. Set Pos. is displayed only when a top-of-form position is set using a paper position setting function. Note 2) Settings for the auto feed mode for cut sheets (a rear CSF) apply with ManualSheetCSF set to CSF when paper is fed from a table in the auto feed mode for cut sheets (a rear CSF mode).
  • Page 93 Oki Data CONFIDENTIAL (10) Front Feed Underlined values are defaults. Item (LCD Display) Function Setting(s) (LCD Display) Selects a basic top-of-form position for auto 2.12mm (1/12") Note 1) loading in a continuous-form front tractor 3.18mm (1/8”) mode <the vertical center of the first print 6.35mm (1/4")
  • Page 94 Oki Data CONFIDENTIAL (11) Rear Feed Underlined values are defaults. Item (LCD Display) Function Setting(s) (LCD Display) Selects a basic top-of-form position for auto 2.12mm (1/12") Note 1) loading in a continuous-form rear tractor 3.18mm (1/8”) mode <the vertical center of the first print 6.35mm (1/4")
  • Page 95 Oki Data CONFIDENTIAL (12) Adjustment Underlined values are defaults. Item (LCD Display) Function Setting(s) (LCD Display) TOF Adj.(Cut) Sets a correction value for a basic top-of- (Note 1) form position for manual cut-sheet feeding (or any of numbers of up to ±40)
  • Page 96 Oki Data CONFIDENTIAL Underlined values are defaults. Item (LCD Display) Function Setting(s) (LCD Display) PE Adj.(Rear) Selects a correction value for PE POS. in a continuous-form rear tractor mode (a (or any of numbers of up to ±15) corresponding position is corrected in 1/120 inch increments downward using positive values, and upward using negative values).
  • Page 97 Oki Data CONFIDENTIAL Underlined values are defaults. Item (LCD Display) Function Setting(s) (LCD Display) Regist. Normal Corrects normal-print-speed registration. An appropriate value that (Note 2) The print dot positions of backward printing in is configured at factory unidirectional printing is corrercted in 1/360 shipping (any of numbers of up to ±5)
  • Page 98 Oki Data CONFIDENTIAL 9.2.1.1 Functions of Switches During menu setting, the switches on the operating panel have the functions specified below. Switch Function • Pressing switch 2 while holding down the switch 6 moves forward by one mode, or returns to the first mode if pressed in the last mode.
  • Page 99 Oki Data CONFIDENTIAL Every time the switch 2 is pressed, the setting items are scrolled forward. (Example) Press the switch 2. Press the switch 2. S p a c Press the switch 2 repeatedly until the desired item appears. If you press the switch 5 instead of the switch 2, the setting items are scrolled backward.
  • Page 100 Oki Data CONFIDENTIAL 9.2.2 Adjustment-Mode Menu Underlined values are defaults. Item (LCD indication) Function Setting (LCD indication) TOF Adj.(Cut) Sets the correction value of cut-sheet manual Factory-set to the (Note 1) feed with respect to the TOF reference appropriate value (correctable within ±40).
  • Page 101 Oki Data CONFIDENTIAL 9.2.2.1 Operating Procedure After the adjustment-mode menu has been opened (if paper is not installed, install paper and press the switch 3 to load it), the printer prints out the horizontal printing-position correction items (Nos. 6 to 9), displays the last item (No.
  • Page 102 Oki Data CONFIDENTIAL 10. Procedures for Repairing Before Conducting Repair When you have received a request for repair from a customer, first check whether the problem can be solved through troubleshooting using the operations manual. If possible, ask the customer in what situation the problem occurred and make a note of it.
  • Page 103 Oki Data CONFIDENTIAL Layout of switches and lamps 10.1 Problem Analysis Procedure Start ↓ Turn off the power switch. Disconnect the interface cable. Remove the paper. ↓ Move the carriage to the right and left by hand. ↓ Does the carriage move smoothly?
  • Page 104 Oki Data CONFIDENTIAL Continued from the previous page ↓ Does the printer perform line-feed motion? N: Check for an operating-panel error as specified in section 10.2.4, or for a paper-feed error as specified in section 10.2.5. Y: Press the switch 2.
  • Page 105 Oki Data CONFIDENTIAL 10.2 Repair Procedure The table below shows typical problems. If your problem is not in the table, check for similar problems. Layout of switches and lamps Table 10-1 Item D-etails of problem Section No. Remarks 10.2.1 Power-supply error •...
  • Page 106 Oki Data CONFIDENTIAL 10.2.1 Power-Supply Error • The power switch is turned on but nothing happens. (no lamps light up) Does the AC cord conduct electricity properly? N: Replace the AC cord. Y: Is the AC fuse in the power supply blown? Y: Replace the power-supply assembly (do not replace the fuse).
  • Page 107 Oki Data CONFIDENTIAL 10.2.2 Reset-Circuit Error • The power switch is turned on but nothing happens. (there is no change in the lamp on/off state at power-on) Does pin 58 (RST input signal) of the IC9 (MSM67X640) become high level within the specified length of time after the power is turned on? N: Replace the Control board.
  • Page 108 Oki Data CONFIDENTIAL 10.2.3 Alarm Display If an error occurs, this printer displays the content of the error using the lamps on the operating panel and the LCD. Lamps B and F blink to display the status. Layout of switches and lamps...
  • Page 109 Oki Data CONFIDENTIAL 10.2.4 Operating-panel error • One or more lamps do not light up (the carriage moves). Do all of the lamps remain off? Y: Are the voltages between pins 6/8 and pins 4/5/7 of connector CN1 of the operation board within the range of 4.75 to 5.25 V?
  • Page 110 Oki Data CONFIDENTIAL 10.2.5 Paper-feed error • Paper end is detected even if there is paper installed (the lamp B lights up). 1 Continuous forms are used (front tractor). Is [FRONT] selected on the LCD? N: Go offline and press the switch 4 to choose [FRONT].
  • Page 111 Oki Data CONFIDENTIAL 2 Continuous forms are used (rear tractor: optional). Is [REAR] selected on the LCD? N: Go offline and press the switch 4 to choose [REAR]. Y: Are cut sheets also installed? Y: Remove the cut sheets. N: Is the rear PE sensor dusty or stained? Y: Clean it and go to N.
  • Page 112 Oki Data CONFIDENTIAL 3 Cut sheets are used (rear CSF: optional). Is [CSF Rear] selected on the LCD? N: Go offline and press the switch 4 to choose [CSF Rear]. Y: Is the rear PE sensor dusty or stained? Y: Clean it and go to N.
  • Page 113 Oki Data CONFIDENTIAL 4 Cut sheets are used (manual feed). Is [MANUAL] selected on the LCD? N: Go offline and press the switch 4 to choose [MANUAL]. Y: Is the S/C board sensor or the sheet-guide upper-front-assembly sensor dusty or stained? Y: Clean them and go to N.
  • Page 114 Oki Data CONFIDENTIAL • Paper end is not detected even if there is no paper installed (the lamp B does not light up). 1 Continuous forms are used (front tractor). Is [FRONT] selected on the LCD? N: Go offline and press the switch 4 to choose [FRONT].
  • Page 115 Oki Data CONFIDENTIAL 2 Continuous forms are used (rear tractor: optional). Is [REAR] selected on the LCD? N: Go offline and press the switch 4 to choose [REAR]. Y: Is the rear PE sensor dusty or stained? Y: Clean it and go to N.
  • Page 116 Oki Data CONFIDENTIAL 3 Cut sheets are used (rear CSF: optional). Is [CSF Rear] selected on the LCD? N: Go offline and press the switch 4 to choose [CSF Rear]. Y: Is the rear PE sensor dusty or stained? Y: Clean it and go to N.
  • Page 117 Oki Data CONFIDENTIAL 4 Cut sheets are used (manual feed). Is [MANUAL] selected on the LCD? N: Go offline and press the switch 4 to choose [MANUAL]. Y: Edit the menu settings and print them out. Is the printer set to output a paper-end signal if paper end is detected in cut-sheet manual mode (set to [Offline])? N: Select [Offline], and check whether the printer has recovered from the error.
  • Page 118 Oki Data CONFIDENTIAL • Paper is not fed at all or the line-feed pitch is abnormal. • The LF motor makes an inappropriate noise. Turn off the power switch. Does the platen knob rotate smoothly? N: Remove the mini pitch belt from the LF motor gear. Rotate the LF motor by hand, or turn on the power to perform LF/FF motions.
  • Page 119 Oki Data CONFIDENTIAL • Paper jams occur frequently. • Paper is torn. • Skew occurs. Is the paper path clogged with paper dust? Y: Remove the paper dust. N: Are the paper’s sprocket holes aligned with the pins of the pin tractor? N: Adjust the sheet-feeder assembly so that the pins of the pin tractor are positioned in the center of each sprocket hole.
  • Page 120 Oki Data CONFIDENTIAL 10.2.6 Carriage Motion Error • The character pitch is abnormal, characters overlap, or the printing position offsets horizontally. • ERROR 101 (homing error) occurs. • ERROR 102 (spacing error) occurs. Turn off the power switch, remove the ribbon cartridge, and rotate the ribbon feed knob by hand.
  • Page 121 Oki Data CONFIDENTIAL Continued from the previous page N: Is the auto-gap mode selected? Y: Correct the automatic paper-thickness adjustment distance (see section 8.3). N: If the printer is in auto-gap mode, does the setting of [GAP X] (X=1 to 8, A to E) displayed on the screen during printing match the paper thickness? N: Edit the manual gap setting to match the paper thickness.
  • Page 122 Oki Data CONFIDENTIAL 10.2.7 Ink-Ribbon Feed Error • The ink ribbon is not fed properly or is not fed at all. • Ink-ribbon jams occur. • The print is too light or smeared, or the print density is uneven. Is the problem solved if the ribbon cartridge is replaced? Y: Replace the ribbon cartridge.
  • Page 123 Oki Data CONFIDENTIAL 10.2.8 Print-Head Motion Error • Dots are missing or excess dots are printed. • Dots are offset. • The printer does not print at all (the carriage moves). Is auto-gap mode selected? Y: Correct the automatic paper-thickness adjustment distance (see section 8.3).
  • Page 124 Oki Data CONFIDENTIAL 10.2.9 Parallel-Interface Error • The lamp D is on but the printer does not print at all (no reaction). • The lamp D goes out and the printer does not print. • The printer misprints or prints meaningless characters.
  • Page 125 Oki Data CONFIDENTIAL 10.2.10 USB Interface Error • The lamp D is on but the printer does not print at all (no reaction). • The lamp D goes out and the printer does not print. • The printer misprints or prints meaningless characters.
  • Page 126 Oki Data CONFIDENTIAL 10.2.11 Automatic Paper-Thickness Adjustment Motion Error • ERROR 0103 (auto gap error) occurs. Is the auto-gap motor running? N: Measure the resistance between the terminals of the auto-gap motor assembly in the locations specified below, and check for broken wires, short circuiting with another cord, or other fault.
  • Page 127 Oki Data CONFIDENTIAL 10.2.12 Printing-Position Error • The printing start position is offset. The printer prints past the paper edge. Is the paper-width sensor dusty or stained? Y: Clean it and go to N. N: In offline mode, press the switch 4 to choose [MANUAL]. Conduct the sensor check in maintenance mode.
  • Page 128 Oki Data CONFIDENTIAL 10.2.13 Unrecoverable Errors 1 ERROR 0107 (fan error) occurs. Is the connection cord connected properly to the CN14 on the Control board and the CN2 on the Carriage board? N: Connect them properly. Y: Does the connection cord conduct electricity? N: Replace the connection cord.
  • Page 129 Oki Data CONFIDENTIAL 11. Periodically Replaced Parts The table below shows the maintenance parts for the mechanical and control units that are required when 100 units of this printer are used under the working conditions specified below for a year.
  • Page 130 Oki Data CONFIDENTIAL Table 11-1 (2/2) Maintenance Parts List Quantity used Requirement Quantity as Description Diagram No. Remarks for a printer level maintenance parts LCD assembly 41590601 Slider 41633501 AG-sensor board assembly 41592301 Space motor 41573001 Ribbon motor assembly 41636701...
  • Page 131 Oki Data CONFIDENTIAL 12. Theory of Operation 12.1 Outline This printer consists of the print mechanical unit and the print control unit. The mechanical unit consists of the print head, the space system, the line-feed system, the ribbon-feed system, the auto-gap system, and the skew correction system. These components perform the actions specified below.
  • Page 132 Oki Data CONFIDENTIAL 12.2 Electrcal Operation (See Figure 12-1.) The control circuit consists of a µ CPU with various peripheral LSI circuits. 12.2.1 µ CPU and Peripheral Circuits µ CPU [ MSM67 × 640] The µ CPU is the nucleus of the control circuit. It controls the peripheral LSI and the entire printer. In addition, it reads on/off data for the seven table sensors and seven paper end sensors, as well as the data for the D-roller rotation detection sensor.
  • Page 133 Oki Data CONFIDENTIAL (i) Controls the operating-panel LSI for control of the operating-panel switches and lamps and the LCD in accordance with commands input from the µ CPU (j) The AG , paper change, LF, ribbon-motor control signal, and various sensor signals are allocated.
  • Page 134 Oki Data CONFIDENTIAL Fig. 12-1 134 / 41829406TH Rev.2...
  • Page 135 Oki Data CONFIDENTIAL 12.3 Mechanical Operation 12.3.1 Print Head Mechanism and Operation (See Figures 12-2 & 12-3.) The print head is a spring-charged head using a permanent magnet. The head is mounted on the carriage, which travels parallel to the platen.
  • Page 136 Oki Data CONFIDENTIAL (1) Print Head mechanism (See Figure 12-3.) The armature spring is loosened by the permanent magnet, and the armature is adhered to the core. The print wire attached to the armature is in the reset state. When a print command is sent from the print control unit, the magnet coil is excited and generates a magnetic field opposite that of the permanent magnet.
  • Page 137 Oki Data CONFIDENTIAL 12.3.2 Space Mechanism Spacing is performed by driving the carriage on the main and sub shafts mounted in parallel to the platen by the DC servo motor. Spacing (See Figure 12-4.) The carriage carrying the print head is moved in parallel to the platen by the main shaft and the sub shaft.
  • Page 138 Oki Data CONFIDENTIAL 12.3.3 Ribbon-Feed Mechanism (See Figure 12-5.) The ribbon-feed mechanism feeds the ink ribbon, and drives using the stepping motor. Ribbon Cartridge A one-way-feed endless ribbon is used. The mechanism is designed to ensure consistently clear printing. Feeding The ribbon-feed mechanism not only operates during printing, but also begins to drive as soon as the spacing motion begins to operate, and stops ribbon feeding when spacing stops.
  • Page 139 Oki Data CONFIDENTIAL 12.3.4 Head Gap Adjustment Mechanism There are two head gap adjustment mechanisms: the manual gap adjustment mechanism and the auto gap adjustment mechanism. The manual gap adjustment mechanism adjusts the gap between the print head and the platen according to the paper thickness through operation of a switch on the operating panel or a menu setting.
  • Page 140 Oki Data CONFIDENTIAL Auto Gap Adjustment Mechanism The auto gap adjustment mechanism adjusts the gap between the platen and the print head automatically according to the paper thickness. When [Auto] is selected, the mechanism moves the print head up and down, and drives using a stepping motor.
  • Page 141 Oki Data CONFIDENTIAL Spring Main shaft Idle gear Stepping motor (auto-gap motor) Adjust cam Idle gear Spring Platen Print head Ribbon protector Idle gear Carriage frame Platen Slit disk Ribbon protector Figure 12-7. Auto Gap Adjustment Mechanism 141 / 41829406TH Rev.2...
  • Page 142 Oki Data CONFIDENTIAL 12.3.5 Paper Feed Mechanism (See Figures 12-8, 12-9, and 12-10.) Line feeding is done by the rotation of the feed roller, platen, and sheet feeder, which are driven by a stepping motor. Paper Feeding The stepping motor for line feeding is mounted on the left-hand frame.
  • Page 143 Oki Data CONFIDENTIAL Paper change Selector Mechanism The selection of cut sheets and continuous forms is made by switch operation on the printer’s operating panel. Press the paper-mode switch on the operating panel to select [MANUAL]. The cut-sheet/ continuous-form selector motor begins to run and slides the mode rack, driving via the gears and shafts.
  • Page 144 Oki Data CONFIDENTIAL Mode rack R Upper roller Cut-sheet/continuous-form selector motor Mode shaft Sensor PCB Mode rack L Continuous-form retraction (rear) Continuous-form (rear) Cut sheet Continuous-form (front) Continuous-form retraction (front) Figure 12-9 144 / 41829406TH Rev.2...
  • Page 145 Oki Data CONFIDENTIAL Cut sheet Yawing shaft Drive shaft Upper roller Roller-arm end Feed roller Continuous form Release (Continuous-form retraction) Figure 12-10. Positions of the Upper Roller 145 / 41829406TH Rev.2...
  • Page 146 Oki Data CONFIDENTIAL 12.3.6 Paper End Detection Mechanism (See Figure 12-11.) A reflective sensor is used to detect whether paper is loaded. From the position detected by this sensor, the remaining amount of paper is calculated and paper end is detected in accordance with the menu setting.
  • Page 147 Oki Data CONFIDENTIAL 12.3.7 Skew Correction Mechanism/Skew Detection Mechanism The skew correction mechanism detects paper on the table, and presses the paper to the feed roller using the slip roller to automatically correct the skew of the paper (see figure 12-12).
  • Page 148 Oki Data CONFIDENTIAL The skew detection mechanism detects skew of the paper by monitoring the leading edge of paper fed by the feed rollers using the seven paper end sensors (reflective sensors) mounted in parallel to the feed rollers (Figure 12-13).