Userinstallable modules

Expansion sockets located behind a panel at the rear of the plotter allow the user to install additional memory modules. These SIMMs (single in--line memory modules) are available in 4MB and 8MB sizes. Installation is accomplished by removing the access panel (4 screws), installing the module(s), and reattaching the access panel. ROM sockets are also provided for use with ROM enhancements as developed. Installation instructions are provided with the modules and also provided in Chapter 6 of...

Main pca removal

To remove the main PCA, perform the following procedure 1. Remove the electronic enclosure cover. 2. Remove the interconnect PCA. 3. Using a 3 16 nut driver, remove the two screws on top of the electronics enclosure from the RS-232-C connector. 4. Using a TORX T-10 screwdriver, remove the two screws on top of the electronics enclosure from the parallel connector. 5. Disconnect all the cable connectors from the main PCA. 6. Using a TORX T-10 screwdriver, remove the 12 screws securing the main...

Mio card removal

To install or remove and replace an MIO card, refer to Figure 6-2 and perform the followir-steps 1. If an MIO card is not already installed, use a small flat blade or Torx T10 screwdriver to remove the two screws that attach the cover plate to the top back of the plotter. Remove the cover plate. 2. If an MIO card is already installed, loosen the MIO card thumbscrews. Carefully pull the MIO card straight up and remove the MIO card from the plotter. 3. To install an MIO card, insert the card into...

Encoder strip removal

To remove the encoder strip, refer to Figure 6-20 and perform the following steps 2. Remove the left and right endcovers. WARNING no* damage the encoder strip. Lay the encode strip on a flat surface when it is not in the plotter. The encoder strip has very sharp edges, exercise care _ when handling to avoid personal injury. 3. Using a 5.5 mm nut driver, remove the nut and washer that secure the encoder strip to the right side encoder spring-bracket. See Figure 6-20. 4. Using a 5.5 mm nut...

Front panel assembly removal

To remove the front panel assembly, perform the following procedure 2. Disconnect the window sensor connector and the front panel cable connector from the front panel assembly. See Figure 6-17. 3. Release the front panel cable from the clamp on the front panel asse'bly. 4. Using a TORX T-20 screwdriver, loosen the three screws that connect the front panel assembly to the right sideplate and slide the front panel assembly clear of the plotter.

Demonstration plot

Two demonstration plot samples are resident in the HP DesignJet 650C plotters. Proper plotter operation can be checked through use of the demo plots. The demo plots show different plotter capabilities including pen line widths and shading. The demo plot can be set to plot in any of the available front panel languages. To plot a demo plot, perform the following steps 1. Turn the plotter ON and load a sheet of media. 2. From the Status display, press the Enter button. 3. Using the arrow buttons,...

Automatic bail lift mechanism removal

To remove the bail lift mechanism, perform the following steps 2. Remove the left and right endcovers. 5. Remove the overdrive support assembly. 6. Remove the drive roller assembly. 7. Using needle-nose pliers, remove the engagement lever spring. See Figure 6-35. 8. Using a TORX T-10 screwdriver, remove the engagement lever screw from inside the left sideplate. Note the placement and p'sitio. of the parts to be removed in the next step for reassembly. 9. Remove the spring, lever, and screw from...

Mechanical Overiew

The Y-axis (carriage) motor is mounted under the plotter's right endcover. It is electrically connected to the interconnect PCA, which contains a Y-axis motor driver. Its drive shaft is mechanically connected to the carriage by way of a small drive belt, double pulley, and main drive belt. When the carriage motor rotates, it moves the carriage assembly. An optical encoder, located on the carriage assembly, provides position feedback for Y-axis servo control. The line sensor, also mounted on the...

Carriage motor removal

To remove the carriage motor, perform the following steps 2. Remove the electronics enclosure cover. 3. Disconnect the carriage motor cable connector (labeled C) from te interconnect PCA. 4. Press the small drive belt against the tensioner wheel in the belt tensioner to loosen the belt and slide the belt off of the motor gear. See Figure 6-18. 5. Carefully release the tensioner wheel. 6. Using a TORX T-15 screwdriver, loosen the two carriage motor screws about 1 4 inch and rotate the motor...

While removing each screw in step 2 relieve the spring tension slightly by holding the spring with one iand to avoid

Using a TORX T-10 screwdriver, remove the screws and washers that attach the left and right springs to the pivot spring anchor pins. See Figure 6-21. 3. Using a 7 mm wrench, loosen the two nuts that secure each end of the rollfeed cover to the pivots. 4. Pull the rollfeed cover clear of the plotter.

Dram simm and rom module removal

To install or remove and replace a module, perform the following steps 1. Using a small flat blade or Torx T10 screwdriver, remove the four screws that attach the cover plate to the back of the plotter and remove the cover plate. See Figure 6-1. 2. After removing the cover plate, you will see four module slots 2 larger ROM expansion slots above 2 smaller DRAM SIMM memory expansion slots. 3. Attach a conductive wristband (if available) to yourself and a good chassis ground on the plotter or...

Front panel controls

Plotter set-up and plot management functions are input through the front panel. The front panel contains a 2-row by 20-character vacuum fluorescent display. Menu scrolling and implementation are accomplished through 4 menu buttons. Plotting modes are initiated through the color monochrome select buttons and print quality buttons. User interaction is available through 3 pen media action buttons. LEDs associated with various buttons are used to indicate whether the function is enabled or...

Drop detect and bail sensors removal

To remove the drop detect or bail sensor, refer to Figure 6-27 and perform the following procedure 3. Move the pen carriage to the middle of the platen. 4. Disconnect the drop detect sensor cable connector from the wire harness. Release the drop detect sensor cable from the Y-tensioner bracket and let the cable hang down. 5. Using a TORX T-9 screwdriver, remove the four screws that secure the service station cover to the service station housing. 6. While holding the sled in position with one...

Outer electronics enclosure assembly removal c2858a only

To remove the outer electronics enclosure assembly, perform the following procedure 1. Remove the electronics enclosure cover. 2. Disconnect all the cables from the PCAs shown in Figure 6-6. 3. Using a Torx T-15 screwdriver, remove the bottom three, and loosen the top three, electronics enclosure assembly screws shown in Figure 6-6. 4. Carefully lift up and pull the electronics enclosure assembly from the plotter making sure to ease the cables through the slots in the assembly.

Using this Manual

This service manual contains information necessary to test, adjust, and service the Hewlett-Packard Models C2858A and C2859A DesignJet 650C plotters. It is designed o help you easily find the cause of a C2858A C2859A hardware problem and to rerform the necessary repairs and adjustments to get the plotters into proper operating condition. Service strategy for this manual is to support the products to the field replaceable unit. For ease of reference, this manual is divided into ten chapters as...

Drop And Bail Sensors

The drop sensor is located in the drop detect assembly. Its purpose is to detect ink drops during pen testing. The drop sensor contains a detector system capable of detecting the presence of a drop shortly after one is fired into the detector. In order for the drop to be fired into the detector, the pen must be positioned over the sensor. An infrared LED sends a beam across an aperture. The beam is received at the other side by a photo-sensitive diode. When a drop passes through the beam, it...

Pinch wheel sensor removal

To remove the pinch wheel sensor, perform the following procedure 1. Remove the electronic enclosure cover. 3. Disconnect the pinch wheel sensor cable connector from the main PCA. 4. Pull the pinch wheel sensor cable clear of any clamps. 5. Using a Torx T-10 screwdriver, remove the two screws that attach the toroid to the bracket. See Figure 6-12. 6. Using a Torx T-20 screwdriver, remove the two screws that attach the toroid bracket to the right sideplate. Don't cross-thread or over-tighten the...

The cutter blade is very sharp Use caution when using the cuter to trim or cut media Keep hands away from the blade

Keep Hands Away From Blade

Loading the Leading Edge of the Media Figure 3-6. 10. When the front panel displays Sheet load Roll load, press the Down Arrow button to select Roll load. 11. When the front panel displays SELECT MEDIA, press the Up or Down Arrow button to scroll through and select the media choice. Press the Enter button to set the plotter for the media type being used. The plotter will now load the roll of media. 12. When indicated on the front panel, raise the pinchwheel lever to the up position. 13. When...

Entry platen assembly removal

To remove the entry platen assembly, perform the following procedure 2. Remove the left and right endcovers. 3. Remove the electronics enclosure cover. 4. Disconnect the media sensor cable from the main PCA. 5. Disengage the media sensor cable from all clamps and remove the media sensor from the entry platen. 6. Lower the rollfeed cover to the open position. 7. Using a TORX T-15 screwdriver, loosen the we 'e screw, that attach the entry platen to the left and right sideplates until the screws...

Adjustments Calibrations

This chapter describes any adjustments and or calibration procedures to be performed on Models C2858A and C2859A DesignJet 650C plotters. Also provided is a listing of 'hen each procedure is required. Adjustments Calibrations Sheet Length Calibration Accuracy Calibration Media Sensor Calibration Drop Detect Calibration Edge Sensor Calibration Bail There are no electrical or mechanical adjustments required on the HP C2858A ad C28 9A DesignJet 650C plotters. DesignJet 650C plotters have several...

Window sensor removal

To remove the window sensor, perform the following procedure 2. Disconnect the window sensor cable connector from the front panel PCA. 3. Using a TORX T-8 screwdriver, remove the two screws that attach t,1 window sensor to the right sideplate and lift the sensor clear of the plotter. See Figure 6-13. Don't cross-thread or over-tighten the screws when installing. Window Sensor Cable Window Sensor Window Sensor Cable Window Sensor

Electronics enclosure cover removal

To remove the electronics enclosure cover, perform the following procedure 1. Switch the plotter OFF and disconnect the ac power cord and interface cable from the plotter. 2. If a modular input output (MIO) card is installed, remove the MIO from the plotter. 3. Using a TORX T-15 screwdriver, remove the rear sideplate trim pieces and electronics enclosure cover shown in Figure 6-3. The C2858A has 10 cover screws and the C2859A has 12 cover screws. The trim pieces have two screws each. 4. Gently...

Loading sheet media

To load sheet media, perform the following steps 1. Ensure that the pinchwheel lever is down and the roll cover is closed. 2. Load the leading edge of the sheet making sure to push the sheet in straight (not skewed) while aligning the right edge of the sheet with the perforated line on the entry platen. See Figure 3-8. 3. Push the sheet in until it buckles slightly as it hits the stops inside the plotter. (The buckling should be even across the width of the sheet.) Let go as soon as the plotter...

Error Messages And Codes

Two types of error messages can be viewed in the front panel display Worded error messages indicate that a user error or an internal error has occurred. Some error messages require action to clear, and others are only displayed until the next operation is performed by the plotter. See Table 8-1. The plotter experienced an internal alignment failure. The window was lifted, or the front panel was used to perform some other action while pen alignment was proceeding. Press the down arrow to...

Loading roll media

If the spindle is already loaded into the plotter, remove the spindle by opening the roll cover and pulling on both ends of the spindle to remove it from the plotter. To load roll media into the plotter, put a roll of media on the plotter spindle and insert the spindle in the plotter by performing the following steps Be sure that the plotter wheels are locked to prevent the plotter from moving while loading roll media. To lock the wheels, press the locking levers on the wheels to the down...

Configuration Plot

The configuration plot aids in the analysis of plotter problems by providing a hardclip border around the plot so the margins can be measured. unique patterns for use in detecting pen nozzle problems, pen-to-pen alignment problems, ink flow problems and vertical line straightness. four, X-shaped marks (crosshairs) for measuring plotter pen-to-pen accuracy (The centers of the crosshairs should be 500 mm apart). pen palette set up information. the plotter statistics, including code rev and Rom...

Rollfeed module assemblies left and right removal

To remove the left or right rollfeed module assembly, perform the following procedure 1. Remove the appropriate left or right endcover as required. 2. Remove the rollfeed cover assembly. 3. Using a TORX T-20 screwdriver, remove the three screws that secure the rollfeed module assembly to the sideplate. See Figure 6-22. Module Assembly Screws (3) Each Side Module Assembly Screws (3) Each Side

Rom Code Revision Level

When powered on, the plotter scans the ROM SIMM slots from top to bottom in sequence and determines the presence of any code revision level upgrades. If any upgrade modules are present, the plotter executes the first code upgrade encountered and overrides the code level resident in the ROM on the main PCA. Typically, any ROM SIMM code upgrade will be a higher level than that on the main PCA. The only way this could be reversed is if new main PCA ROMS were installed while an older revision level...

Overdrive support assembly removal

To remove the overdrive support assembly, perform the following procedure 2. Remove the left and right endcovers. 4. Remove the front panel assembly. 7. Remove the service station assembly. 8. Using a TORX T-15 screwdriver, remove the gear shoulder screw that secures the overdrive cluster gear to the left sideplate. See Figure 6-31. 9. Pull the overdrive cluster gear out of the plotter. The gear should move freely when properly installed. 10. Using needle-nose pliers and a small standard...

Power supply pca removal

To remove the power supply PCA, perform the following procedure 1. Remove the electronics enclosure cover. 2. For model C2858A plotters, remove the outer electronics enclosure assembly. 3. Remove the flexible, DANGER HIGH VOLTAGE, protective cover from the electronics enclosure. Carefully flex the cover and pull it out of the plotter. 4. Disconnect the ac connector and the dc power distribution connector at the power supply PCA. 5. Using a TORX T-10 screwdriver, remove the six screws that...

Ytensioner and housing removal

To remove the Y-tensioner and housing, perform the following procedure 2. Slide the pen carriage a few inches towards the center of the plotter in order to access the tensioner. 3. Remove the trailing cable guide screw which attaches the guide to the tensioner housing. 4. Using a TORX T-15 screwdriver, remove the tensioner plate screw. See Figure 6-25. C A U T I O N tensioner plate is und' spn.g te.ion. Ensure that the plate does not spring back. Hold the right end (viewed from the rear) of the...

Pen carriage assembly and main drive belt removal

To remove the pen carriage assembly, see Figure 6-26 and perform the following procedure 2. Remove the left and right endcovers. 3. Disconnect the trailing cable from the carriage PCA. 4. Using a TORX T-15 screwdriver, remove the screw that secures the trailing cable bracket to the pen carriage assembly and lift the trailing cable assembly clear of the pen carriage assembly. 5. Remove the trailing cable guide. 7. Remove the Y-tensioner and housing. 8. Slide the main idler out of the housing. 9....

General Definitions of Safety Symbols

International caution symbol (refer to manual) the product will be marked with this symbol when it is necessary for the user to refer to the instruction manual in order to protect against damage to the instrument. Indicates dangerous voltage (terminals fed from the interior by voltage exceeding 1000 volts must also be marked). Protective conductor terminal. For protection against electrical shock in case of a fault. Used with field wiring terminals to indicate the terminal which must be...

Media type and print quality

DesignJet 650C plotters have several combinations of plotting modes. Each mode is dependent upon the color monochrome setting, media type, and print quality settings input through the front panel. Interaction between the settings produces the ten modes. Each mode has a unique combination of print resolution, number of passes and resultant ink-drying time. Media Type is set through the front panel when media is loaded into the plotter. The front panel display prompts the user to select for sheet...

Drive roller assembly removal

While removing the drive roller assembly, see Figure 6-34. To remove the platen roller assembly, perform the following procedure 2. Remove the left and right endcovers. 5. Remove the overdrive support assembly. 6. Remove the carriage drive motor assembly. 7. Remove the paper drive motor assembly. 8. Using a TORX T-10 screwdriver, remove the two screws that secure the drive roller worm gear to the drive roller shaft. See Figure 6-34. 9. Pull the drive roller worm gear clear of the drive roller...

Service Tests

HP DesignJet 650C plotters have numerous internal service tests that can be used in troubleshooting. To access the service tests menu, perform the following steps Certain plotter failures that can occur will prevent the plotter from reaching the STATUS Ready for Media state. If one of these problems occurs, switch the plotter OFF. Press and hold down the ENTER and the UP ARROW buttons while switching the plotter ON. This will allow access to the service tests. 3. Use the ARROW buttons to scroll...

Front panel languages

DesignJet 650C plotter menus and messages can be configured to display in English, French (Francais), German (Deutsch), Spanish (Castell.), Italian (Italiano), Portuguese (Portuguese) and Japanese (Katakana) characters. To change the display language, or if the display is in a language you cannot understand, use the following procedure to get to a language you do understand. 2. Press and hold down the Enter button while turning the plotter ON. Release the Enter button. 3. Using the arrow...

Primer assembly and sensor removal

To remove the primer assembly and sensor, perform the following steps 3. Disconnect the primer assembly and sensor cable connector. 4. Disconnect the four rubber tubes from the primer assembly. 5. Using a TORX T-20 and extension bit, remove the two bottom screws and loosen the top screw, that attach the primer assembly to the left sideplate. See Figure 6-11. 6. Slide the primer assembly out from the plotter. 7. To remove the optical sensor from the primer assembly, use a TORX T-10 screwdriver...

Pinch arm and lift mechanism removal

To remove the pinch arm lift mechanism, perform the following procedure 7. Place the manual lift lever in the down position. 8. Disconnect the rocker plate tension spring to relieve any remaining tension on the pinch arm lift mechanism. See Figure 6-37. 9. On the right side, use a TORX T-9 screwdriver to turn the cam journal screw 12 turns counter-clockwise and push the screw in toward the center of the plotter. Repeat this step again and try to pull the cam journal and rear wire link to the...

Performed only by servicetrained personnel otherwise personal injury may occur

If ink is spilled on the drive roller, remove the ink. Due to the ink's reflectance, ink on the roller can disrupt the plotter's edge-sensing function. To remove any ink from the roller, perform the following procedure 1. Connect the plotter to an ac power source. 3. Press the Enter button on the front panel. 4. Using the arrow buttons, scroll to the utilities menu display, then press the Enter button. 5. Using the arrow buttons, scroll to the statistics submenu display. 6. Simultaneously press...

Poweron Self Tests

HP C2858A 9A DesignJet 650C plotters will automatically perform a series of internal self tests, as well as certain initialization sequences, whenever the plotter is switched ON. These self test and initialization sequences are described in the following paragraphs. As the plotter moves through the tests, a series of dots will quickly appear on the display. During a failure condition, a failure analysis may be performed by either noting th number of dots present on the display or interpreting...

Simplified Description Of Circuits

HP C2858A 59A DesignJet 650C circuits communicate with an external contro'ler by w ay of either a Centronics or an RS-232-C interface. If an approved modular input output MIO printed circuit assembly PCA is installed, the circuits can communicate by way of an HP-IB interface or be connected to a network. The main processor reads Centronics, HP-IB, and Ethernet communications through the port it uses to read memories ROM or DRAM . RS-232-C communications are handled by a universal, asynchronous,...