® CROMA24 COLOR PRINTER SERVICE MANUAL
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® Croma24™ COLOR INKJET PRINTER SERVICE MANUAL Part Number 208817
Croma24 Service Manual Copyright © 1995 and 1996 ENCAD®, Inc. All rights reserved. ENCAD is a registered trademark of ENCAD, Inc. CROMA24™ is a trademark of ENCAD, Inc. Other trademarks and registered trademarks are the property of their respective owners.
Croma24 Service Manual FCC Statement (U.S.A.) The United States Federal Communications Commision has specified that the following notice be brought to the attention of the users of the Croma24 printers. FEDERAL COMMUNICATIONS COMMISION RADIO AND TELEVISION INTERFERENCE FOR CLASS B DEVICE This equipment has been tested and found to comply with the limits for a class B digital device, pursuant to part 15 of the FCC Rules.
Croma24 Service Manual VDE Statement Hiermit wird bescheinigt, daß der CROMA24 in Übereinstimmung mit den Bestimmungen der BMPT-AmstbIVfg 234/1991 funkentstört ist. Der vorschriftsmäßige Betrieb mancher Geräte (z.B. Meßsender) kann allerdings gewissen Einschränkungen unterliegen. Beachten Sie deshalb die Hinweise in der Bedienungsanleitung.
Croma24 Service Manual Material Safety Data Sheet CROMA24 QIS (Quality Image Supplies) ink is nonhazardous, requiring no special disposal handling. It can be harmful if swallowed and should be kept away from children. To obtain a Material Safety Data Sheet, contact ENCAD, Inc. at: 6059 Cornerstone Court West San Diego, CA 92121-3734 (619) 452-4350 International users should contact their local dealer or distributor.
Croma24 Service Manual WARRANTY OR DAMAGE CLAIMS United States ENCAD®, Inc., warrants its printers ("PRODUCT") to be free from defects in workmanship and materials for a period of one year from the date of purchase. In order to submit a Warranty claim, please contact the ENCAD Help Desk at (619) 452-4350. ENCAD reserves the right to make changes or improvements to Products, without incurring any obligation to similarly alter Products previously purchased.
Croma24 Service Manual Table of Contents Chapter 1 General Description............................................................. 17 Introduction ............................................................................................................... 17 Overview ................................................................................................................... 18 Related Publications ...........................................................................................
Croma24 Service Manual Table of Contents (cont) Chapter 3 Maintenance (cont) Service Station Cleaning .............................................................................. 45 Linear Encoder Strip Cleaning ...................................................................... 46 Cartridge Dimple Cleaning ........................................................................... 47 Flex Cable Contact Cleaning ........................................................................
Croma24 Service Manual Table of Contents (cont) Chapter 3 Maintenance (cont) Firmware/Software Upgrades .................................................................................... 76 Internal Cabling and Signal Flow Diagram ................................................................ 77 Chapter 4 Troubleshooting ................................................................... 79 Introduction ...................................................................................................
Croma24 Service Manual Table of Contents (cont) Chapter 5 Assembly\Disassembly (cont) Remove the Lower Roller Assembly and Stepper Motor ......................................... 112 Install the Lower Roller Assembly and Stepper Motor ............................................. 115 Remove the Power Supply and AC Entry Module ................................................... 117 Install the Power Supply and AC Entry Module .......................................................
Croma24 Service Manual List of Illustrations Figure Page Chapter 1 General Description Chapter 2 Theory of Operation 2-1. 2-2. 2-3. 2-4. 2-5. 2-6. 2-7. 2-8. 2-9. 2-10. 2-11. 2-12. 2-13. General Block Diagram ................................................................................... 26 Paper (Media) Axis Drive ................................................................................. 27 Carrier Axis Drive ....................................................................................
Croma24 Service Manual List of Illustrations (cont) Figure Page Chapter 3 Maintenance (cont) 3-17. 3-18. 3-19. 3-20. 3-21. 3-22. 3-23. 3-24. 3-25. 3-26. 3-27. 3-28. 3-29. 3-30. 3-31. 3-32. 3-33. 3-34. 3-35. 3-36. Setting Up Tools from Height Gauge Kit .......................................................... 61 Zeroing the Micrometer Gauge ........................................................................ 62 Test Cartridge Installed ................................................................
Croma24 Service Manual List of Illustrations (cont) Figure Page Chapter 5 Assembly/Disassembly (cont) 5-10. 5-11. 5-12. 5-13. 5-14. 5-15. 5-16. 5-17. 5-18. Trailing Cable Assembly Removal/Installation ............................................... 106 Carrier Bushing Removal .............................................................................. 108 Carrier Bushing Installation............................................................................ 109 Service Station, Exploded View ........
Croma24 Service Manual List of Tables Table Page Chapter 1 General Description Chapter 2 Theory of Operation 2-1. Front Key Control LED Codes ......................................................................... 41 Chapter 3 Maintenance 3-1. 3-2. Pinch Roller Adjustments ................................................................................ 58 Keypad Test Indications ................................................................................... 71 Chapter 4 Troubleshooting 4-1.
General Description 1 GENERAL DESCRIPTION Introduction This manual provides service information for the ENCAD, Inc. Croma24 Color Inkjet Printer. There are three versions to the Croma24 Color Inkjet Printer family: CAD version for: CAD market I/O: parallel includes: GA & CAD version GA & CAD serial & parallel GA version GA serial & parallel ENCAD software RIP All versions will have an ADI Windows driver and print utility.
Croma24 Service Manual plotters to respond to and anticipate our customers’ needs. Principal features are summarized below. Three Versions: CAD, GA (Graphic Arts), GA & CAD ENCAD’s software RIP supplied with the GA (Graphic Arts) version Remotely Configured via Host Computer 25" (63.6 cm) Maximum Media Width 600 x 600 dpi (mono) addressable 300 x 300 dpi (color) Overview Printers draw according to instructions issued from a “host” computer.
Croma24 Service Manual Warnings, Cautions, and Notes WARNINGS - Warnings are used to stress that the following steps or procedure has the potential to cause serious harm or death to service personnel. Extreme care should be observed when following the procedures and to exercise standard safety procedures. They are indicated by: Followed by a paragraph describing the concern. CAUTION - Cautions depict that the following steps or procedures can cause damage to the equipment if not properly followed.
Croma24 Service Manual Printer Specifications The specifications and performance characteristics of the Croma24 Color Inkjet Printers are as follows: Max Printing Area: Norm 23.8” 60.9cm Extend 24.6” 62.9cm Accuracy: 0.
Croma24 Service Manual Contents of this Service Manual Material in this manual may be repeated in various sections so that each section can “stand alone”. This allows information to be located without having to refer back and forth between sections. Figures and tables are easily located and cross-referenced, and are listed in the front of the manual under List of Illustrations and List of Tables.
Croma24 Service Manual Chapter 4 TROUBLESHOOTING - A table containing problems that could occur and possible causes and repairs is found in this chapter. This table is not intended to be a complete listing of troubleshooting procedures. It will isolate the problem down to the lowest replacable assembly. If the problem happens to be the wiring between assemblies, standard troubleshooting techniques will have to be implemented to correct the problem.
Croma24 Service Manual Technical Support ENCAD BBS: ENCAD Website: (619) 452-2653 or (619) 452-3768 http://www.encad.com Additional information is available though our Technical Support and Service Department’s Help Desk. ENCAD, Inc. Technical Support & Service Dept. 6059 Cornerstone Court West San Diego, CA 92121 Help Desk Telephone: Help Desk FAX: (619) 452-4350 (619) 546-0659 International Users contact your local ENCAD service provider. see details on your ENCAD registration card.
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Theory of Operation 2 Introduction This chapter explains the mechanical and electrical theory of operation of the ENCAD Croma24 D-Size Color Inkjet printer. THEORY OF OPERATION The Croma24 is a MC68322 microprocessor-based digital printer that receives plotting instructions from a host computer through either the RS-422 serial interface or the Centronics parallel interface. Croma24 Printer General Block Diagram Figure 2-1 illustrates the major functional areas of the printer.
Croma24 Service Manual Figure 2-1. General Block Diagram.
Croma24 Service Manual Paper (Media) Axis Drive THEORY OF OPERATION Figure 2-2. Paper (Media) Axis Drive. The Paper (Media) Axis Drive moves the plotting media in a direction perpendicular to the length of the printer. This friction drive utilizes a micro-step drive technology and consists of a stepper motor, reduction gears, lower drive shaft assembly, and pinch wheels. This can be seen in Figure 2-2.
Croma24 Service Manual The Carrier Axis Drive Figure 2-3. Carrier Axis Drive. The Carrier Axis Drive moves the printer’s carrier assembly along the length of the printer. The drive consists of a servo motor, linear encoder strip, drive belt, and tension assembly. These items are illustrated in Figure 2-3. The servo motor, drive belt, and tension assembly are the components that actually drive the carrier assembly.
Croma24 Service Manual Main Printed Circuit Board (MPCB) THEORY OF OPERATION Figure 2-4. Main Printed Circuit Board. The Main Printed Circuit Board (MPCB) consists of six functional areas: 1. Microprocessor (CPU) 2. Gate Array 3. Memory Circuits 4. Stepper Motor Controller 5. Servo Motor Controller 6.
Croma24 Service Manual Microprocessor The microprocessor (a Motorola MC68322) is the central processor unit which supervises system functions, executes the printer firmware, manipulates data, and controls input/output data busses. It has a built-in parallel port, a two channel DMA (Direct Memory Access) controller, timer module, clock generator, and an on-board chip select generator.
Croma24 Service Manual The gate array contains the hardware logic for dot firing, monitoring changes in the Carrier Assembly position, controlling DMA for the serial port, and generating the PWM (Pulse Width Modulation) waveforms for the servo controller. Memory Circuits Memory is used to retain large amounts of information. This information is stored in the device memory in the form of binary bits. Printer memory consists of Flash EEPROM, DRAM, and EEPROM.
Croma24 Service Manual The system firmware is stored in Flash EEPROM and can be upgraded by opening the Control Panel located on the host computer. Once the Control Panel has been executed, it first starts an initialization and status communication sequence with the printer. The Control Panel requires ink levels and deadband information to load correctly. At the same time, it checks the version of firmware that is loaded on the printer.
Croma24 Service Manual Stepper Motor Controller The media is driven by a Stepper Motor, which drives the media in a direction perpendicular to the length of the printer. The media in the printer can advance forward and backward, depending upon the commands which the Stepper Motor receives from the microprocessor. The Stepper Motor Controller contains two identical circuits, one for each winding of the stepper motor.
Croma24 Service Manual 2. Motor current sense The voltage across a series current sense resistor is measured and level shifted so that it is centered around 5 V. 3. Comparator This portion divides the output of the reference waveform generator by two and compares it to the output of the motor current sensor. Logic inside the gate array generates the control signals for the power driver that applies voltage across the motor winding in order to make the actual current match the reference waveform. 4.
Croma24 Service Manual tor) register in the gate array which sets the duty cycle to make adjustments to the Carrier Assembly speed. A linear optical encoder is used to monitor the Carrier Assembly position. Figure 2-8. Quadrature Signal Generation. Theory of Operation 35 THEORY OF OPERATION The optical encoder strip runs the length of the Stabilizer Bracket and contains 150 lines and spaces per inch. Thus there are 300 edges per inch.
Croma24 Service Manual The direction that the Carrier Assembly is moving is known based upon the state of one detector’s output and the direction of the transition of the other detector’s output. A hardware counter in the gate array increments as the Carrier Assembly moves left and decrements as the Carrier Assembly moves right. The hardware counter is only eight bits wide, so it cannot store a value large enough to represent an absolute Carrier Assembly position.
Croma24 Service Manual Carrier Assembly Circuits THEORY OF OPERATION Figure 2-10. Carrier Assembly Circuits. The Carrier Assembly contains: 1) 2) 3) 4) Carrier PCB Optical Sensors Paper Sensor Inkjet Cartridges The Carrier PCB contains the logic and drive circuitry for the firing of the inkjet cartridges. It also establishes an interface path for the optical sensor and paper sensor to communicate with the MPCB.
Croma24 Service Manual also constantly monitors the media during printing to determine if the media has run out. If no paper is sensed, the paper sensor sends this information to the MPCB, which immediately begins an ‘out of paper’ subroutine. This subroutine starts the LEDS on the printer to blink (green blinks slow while yellow blinks faster.) It also informs the host computer of the situation and stops the printer from printing until more media is loaded.
Croma24 Service Manual THEORY OF OPERATION Figure 2-11. Croma24 System Ground Network (Left Side).
Croma24 Service Manual Figure 2-12. Croma24 System Ground Network (Right Side). Front Key Controls The Control Panel (see Figure 2-13) is located on the lower right side of the printer and consists of five controls and two LED indicators. The controls are (from left to right): Backward, Load, Forward, Cut, and Power. Table 2-1 lists all possible indications allowed using the LEDs and the conditions that generated that indication. Figure 2-13. Front Key Controls.
Croma24 Service Manual Table 2-1. Front Key Control LED Codes.
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Maintenance 3 Introduction This chapter contains general maintenance and cleaning instructions for the Croma24 printer. Scheduled Maintenance Scheduled maintenance consists of a list of checks that are planned to be performed on a regular basis or when conditions warrant it. Below is a list of scheduled maintenance checks and their periodicity.
Croma24 Service Manual Cleaning Procedures Always turn the printer OFF, remove the power cord and the interface cable before cleaning the printer. An electrical shock hazard may be present if these procedures are not followed. External Cleaning Do not use abrasive cleansers of any sort on the surfaces of the printer. Damage to the surface may result. The exterior surfaces of the printer may be cleaned with a soft cloth which has been dampened.
Croma24 Service Manual Printer problems can be caused by an accumulation of dirt or other contamination on the slide shaft. This contamination may lead to drag on the carrier. Extreme drag results in a “carrier axis failure” fault and will stop the carrier motion. These problems may be eliminated by maintaining and cleaning the slide shaft at intervals determined by the environmental conditions. Do not use any lubrication. To clean the slide shaft: 1. Remove the power cord. 2. Raise the middle cover. 3.
Croma24 Service Manual 4. Using a cotton swab dampened with distilled water, wipe the seals and the rubber wiper in the service station until no more ink residue or dust can be removed. 5. With a dry swab, wipe all moisture from the seals and wipers. 6. Close the cover and reconnect the power cord and interface cable. Linear Encoder Strip Cleaning Clean the linear encoder strip monthly, or as necessary, to remove any buildup of debris. Distilled water or isopropyl alcohol may be used.
Croma24 Service Manual Cartridge Dimple Cleaning The cartridge dimple area can easily be contaminated by oils and dirt on fingers and hands or ink spilled onto them. This causes the cartridges to not receive some of the electrical signals for a proper firing of the jets. This can be seen as a misfiring of the cartridge. NOTE Care should be used when handling the cartridges. Avoid touching the cartridges on the dimple area or on the inkjet holes on the bottom.
Croma24 Service Manual Flex Cable Contact Cleaning Figure 3-3. Flex Cable Contacts. Cleaning the flex cable contact area is very important due to the ease of which this area can become dirty. This also causes the cartridges to not receive all of the electrical signals for a proper firing of the jets. This can be seen as a misfiring of the cartridge. NOTE Care should be used when handling the flex cable contact area.
Croma24 Service Manual gears with a stiff brush to knock off any debris. A cotton swab soaked with isopropyl alcohol can be used to remove any ink that may have accumulated on the gears. Clean and Inspect MPCB Foreign material on the MPCB could short out electrical signals being developed on the MPCB and cause erroneous prints or even damage to the MPCB. All electrical circuits should be free of foreign material, especially those with conductive properties.
Croma24 Service Manual Reseat Connectors on MPCB and Carrier Board Integrated circuits may become weakened or damaged by electrical discharge. Do not touch or work near integrated circuits without wearing an ESD wrist strap. Ribbon connectors can be easily damaged if incorrectly handled. Observe extreme caution when handling the ribbon connectors to avoid damage. Many problems can be corrected simply by removing and reseating connections found in circuit assemblies.
Croma24 Service Manual Figures 3-4 and 3-5 shows the locations of all the connectors on the MPCB and carrier board respectively. To remove the ribbon cables from their connectors, lift the connector’s ribbon locking mechanism as shown in Figure 3-6. To reattach, depress the locking mechanism back into the locking position after inserting the ribbon cable end. Figure 3-6. Ribbon Connector Locking Mechanism. Maintenance 51 MAINTENANCE Figure 3-5. Carrier PCB Connection Locations.
Croma24 Service Manual Replace Carrier Bushings The carrier bushings are rated for approximately 1500 hours of operational usage. Given an average of about 3 hours a day of printing for 104 weeks, results in 1560 hours. Therefore, it is safe to approximate 1500 hours into 2 years of continuous service. If not replaced, the wear on the bushings can result in erratic carrier motion and/or carrier axis failures. It can even cause cartridge headheight to become uneven.
Croma24 Service Manual Stepper Motor Winding Resistance Check MAINTENANCE Figure 3-8. Stepper Motor. 1. Disconnect the stepper motor connection from the MPCB. 2. Using a standard ohmmeter or multimeter, measure between pins 1 (yellow wire) and 3. 3. The reading should indicate 7.2 - 8.0 ohms. 4. Continue by measuring between pins 4 and 6. 5. Reading should also indicate 7.2 - 8.0 ohms. 6. If either measurement is out of tolerance, replace the stepper motor.
Croma24 Service Manual Figure 3-9. Examples of Banding. Hardware banding is usually characterized by consistent banding strips as shown. It signifies a slippage in the media’s normal movement that is possibly due to the stepper motor, lower drive shaft assembly, or the rollguides on the back of the printer. All these possible faulty areas deal with a rotational movement that, if faulty, will generate a consistent banding pattern. The MPCB and Carrier PCB can also cause this type of error to incur.
Croma24 Service Manual Alignments/Adjustments The ENCAD Croma24 printers are designed with a minimum of maintenance requirements in mind. Most of the adjustments are controlled and performed via software/firmware interaction that require you to run a subroutine and enter values on the computer. Programmed calibrations include: color calibration, deadband alignment, and X-axis calibration. The mechanical adjustment requirements include the pinch roller adjustments and the encoder strip height adjustments.
Croma24 Service Manual The “Current Heads (Y, M, C)” view represents the alignment of the heads as they are currently entered. This is just an overview of all heads and how they are aligned. Do not attempt to align the heads using this view. The “Color Horizontal Head-to-Head Calibration” checks the alignment of the nozzles horizontally and allows corrections when required. Just enter the value below the set of lines that are correctly aligned.
Croma24 Service Manual X-Axis Calibration The X-axis calibration procedure ensures that the processing that drives the stepper motor is correct to minimize line length accuracy errors. Pinch Roller Adjustment Procedure Use the torque screwdriver with the P0 bit to adjust the Pinch Roller mounting screws. The maximum torque requirement is 1 in-lbs ± 0.5. Figure 3-12. Upper Roller Support Description. 1. Figure 3-12 shows the Upper Roller Support and the mounting screws.
Croma24 Service Manual 2. Become familiar with the actions and results shown in Table 3-1. Note that these actions are performed from behind the printer. Table 3-1. Pinch Roller Adjustments. A CT IO N R ESU LT 1. Turn mo unting screw coun terclockw ise (ccw ). 1. Screw is loosened. 2. Turn mo unting screw clockw ise (cw ). 2. Screw is tigh tened . 3. Lo osen left mou nting screw (tu rn ccw ). 3. R oller mo ves to the right. 4. Tig hten left m onting scre w (tu rn cw ). 4.
Croma24 Service Manual Figure 3-13. Upper Roller Mounting. 4. Following all of the above information precisely will ensure that the Upper Roller Support springs are deflected and the lower tail of the springs will always be pressed against the C-bracket’s vertical wall (without a gap) as shown in Figure 3-13. Figure 3-14. Gap of Pinch Roller. Maintenance 59 MAINTENANCE 3.
Croma24 Service Manual Figure 3-15. Upper Roller Adjustment. Figure 3-15 shows how the motion (rapid drifting to the right or to the left) of the roller determines which mounting screw should be tightened in order to eliminate the motion of the roller so that the roller stays in the center of the shaft and/or there is a gap when the Lower Roller is rotated forward.
Croma24 Service Manual 1. Remove the lid and the right cover of the printer. See Chapter 5 for procedures. 2. Obtain the 3 tools (Micrometer Dial Gauge, Test Cartridge, and Measuring Tip Extender) from the Height Gauge Kit. Assemble the tools as shown in Figure 3-17. Figure 3-17. Setting Up Tools from Height Gauge Kit. Maintenance 61 MAINTENANCE Figure 3-16. Carrier Head Height Tolerance.
Croma24 Service Manual 3. Place the test cartridge upright on a flat surface and ‘zero’ the gauge by loosening the knob near the top and turning the dial until the needle is at the ‘0’ position on the dial. Tighten the knob. See Figure 3-18. Figure 3-18. Zeroing the Micrometer Gauge. 4. Remove the Cyan ink cartridge. Snap the test cartridge with the micrometer gauge into the position vacated by the Cyan ink cartridge. See Figure 3-19. Ensure that the micrometer can be read from the BACK of the printer.
Croma24 Service Manual Damage may occur to the micrometer gauge if the Carrier is moved without lifting up on the measuring tip. This action could also take the micrometer out of alignment and foul the results of the alignment. Figure 3-20. Carrier Positions for Head Height Adjustment. 8. Move the left and right ends of the stabilizer bracket until a reading of 0.075 +/- 0.003” is observed. Read only the RED numbers on the micrometer gauge. The measurement of 0.075 +/-0.
Croma24 Service Manual 10. While lifting up the measuring tip of the micrometer, slide the Carrier to the left of the stabilizer as shown in Figure 320. Position it as close to the screw as possible and drop the measuring tip onto the platen. Do this a couple of times to ensure an accurate reading. 11. Move the left end of the stabilizer bracket until a reading of 0.075” +/- 0.003” is observed. Read only the RED numbers on the micrometer gauge. 12. Tighten the screw on the left end of the stabilizer. 13.
Croma24 Service Manual Croma24 Control Panel During the installation procedures for the Croma24 , a software Control Panel for this printer is installed onto the computer. This control panel provides a means to monitor and adjust certain variables utilized by the printer.
Croma24 Service Manual This brings up the Maintenance Menu as seen in Figure 3-21. Figure 3-21. Maintenance Menu. Figure 3-21 shows that the Maintenance Menu for the Croma24 is divided into 3 submenus: Manufacturing Diagnostics Service Options Manufacturing Menu Figure 3-22. Manufacturing Menu.
Croma24 Service Manual The Manufacturing Submenu (Figure 3-22) consists of two procedures: Print Quality Test Deadband The procedures are primarily used in the manufacturing process and is adjusted correctly before it leaves the plant. They are also available to the field technician in case such adjustments are required to be performed again. Print Quality Test Deadband Figure 3-23. Deadband Options Menu.
Croma24 Service Manual Figure 3-24. Deadband Slow/Fast Display. Figure 3-24 shows what the display will look like when printing either the fast or slow test if it is out of alignment. A correctly aligned printer will appear as if there is only a series of vertical lines printed. No differences will be apparent between the segments in each set of lines . The SLOW DEADBAND calibration is a precision test that checks the firing time of the jets as related to the forward and reverse direction.
Croma24 Service Manual The Diagnostics Menu as seen in Figure 3-25 consists of eight tests: Paper Sensor Test Fan Test Carrier Vibration Test Color Test Keypad Test LED Test Servo Motor Test Paper Motor Test Paper Sensor Test MAINTENANCE The Paper Sensor Test checks the operation of the optical paper sensor. Once activated, a pop-up dialog box (Figure 3-26) appears that displays the widthof the media loaded in inches, centimeters, and millimeters. Figure 3-26. Paper Sensor Reported Data Dialog Box.
Croma24 Service Manual Carriage Vibration Test The Carriage Vibration Test prints 5 sets of 3 parallel lines to test the vibration characteristics of the carrier assembly. Color Test Figure 3-28. Color Test. The Color Test prints a 1 inch swath of each color (total of 4) to test for banding. The test is selectable in the amount of ink that is printed to 10%, 25%, 35%, 50%, 65%, 75%, or 100%.
Croma24 Service Manual Keypad Test The Keypad Test checks the keypads on the MPCB. The keypads are the microswitches that are activated whenever one of the tabs on the actuator is depressed. Each time a switch is activated and hold for a few seconds, a LED (or both LEDs) becomes illuminated. The indications to be observed is listed in Table 3-2. Table 3-2. Keypad Test Indications. Maintenance 71 MAINTENANCE Figure 3-29. Keypad Test.
Croma24 Service Manual The test is selectable in duration. The available time selections are: 5, 10, 20, 30, 40, 50, 60, 90, 120, 180, 240, or 300 seconds, 10 or 30 minutes, or 1 hour. LED Test Figure 3-30. LED Test. The LED Test lights both LEDs on the printer. The test is selectable in duration. The available time selections are: 5, 10, 20, 30, 40, 50, 60, 90, 120, 180, 240, or 300 seconds, 10 or 30 minutes, or 1 hour. Servo Motor Test Figure 3-31. Servo Motor Test.
Croma24 Service Manual The Servo Motor Test tests the servo motor by moving the carrier back and forth across the slide shaft. Speed is selectable to either slow or fast. The number of cycles the carrier does is selectable between 0 and 10,000 cycles. Paper Motor Test MAINTENANCE Figure 3-32. Paper Motor Test. The Paper Motor Test tests the stepper (media) motor by moving the paper forward by a selected number of steps. The number of steps is selectable between 0 and 300 steps.
Croma24 Service Manual Service Menu Figure 3-33. Service Menu. The Service Menu consists of ROM Information. Figure 3-34. ROM Info. The ROM Info screen displays the current firmware version, and date and time of development. This information helps the technician by providing a means of identifying the firmware loaded on the printer. Additional information can be obtained by revealing the Service Special Information Menu as shown in Figure 3-35.
Croma24 Service Manual MAINTENANCE Figure 3-35. Service Special Information. The Service Special Information Menu displays information about the printers plot and ON time (in seconds) as well as the Maximum PWM/Position and Carriage Shut Down Position. Built In Test (BIT) The Croma24 printer has a built in test mode which is used as an additional tool for the technician in troubleshooting.
Croma24 Service Manual To enter the BIT mode, apply power to the printer while simultaneously depressing the ‘soft on’ button. Continue to hold onto the ‘soft on’ button until the carrier assembly has traveled halfway across the length of the platen. Release the ‘soft on’ button. The printer will go through its normal start-up routine. Once the start-up routine is completed, it will perform and print out a series of tests. First thing it will do is prime the cartridges.
Croma24 Service Manual The latest firmware version was included and installed onto the computer during the installation process. To upgrade the firmware on the printer, open the Control Panel with the printer online. During the initial start up of the Control Panel, it communicates with the printer’s firmware. The Control Panel is collecting information stored on the printer such as current ink levels and the firmware version.
Croma24 Service Manual Figure 3-36. Signal Wiring Diagram.
Troubleshooting 4 Introduction Chapter 4, Troubleshooting consists of a table that is intended to aide the technician in troubleshooting the Croma24 printer. This table addresses symptoms with their possible causes and solutions. Basic troubleshooting skills will be required to perform the symptom identification, troubleshooting, fault isolation, and repair of the printer when using this table.
Croma24 Service Manual Table 4-1. Troubleshooting Table (cont).
Croma24 Service Manual Table 4-1. Troubleshooting Table (cont).
Croma24 Service Manual Table 4-1. Troubleshooting Table (cont).
Croma24 Service Manual Table 4-1. Troubleshooting Table (cont).
Croma24 Service Manual Table 4-1. Troubleshooting Table (cont).
Croma24 Service Manual Table 4-1. Troubleshooting Table (cont).
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Assembly\Disassembly 5 Introduction Chapter 5 contains the procedures for removal and replacement of the Croma24 printer assemblies and mechanisms. Illustrations are provided for clarity. Steps for each replaceable part may depend on parts already removed in previous disassembly directions. It is recommended that you read through each procedure before beginning the removal and replacement of any assemblies or mechanisms.
Croma24 Service Manual Always turn the printer OFF, remove the power cord and the interface cable before beginning any disasembly procedures. An electrical shock hazard may be present if these precautions are not followed. Remove the Left, Middle (Lid), and Right Covers Removing the Left Cover allows immediate access to the left side of the Platen for removal of the Carrier Assembly, Carrier Drive Belt, Tension Assembly, and the Cutter Activator.
Croma24 Service Manual Figure 5-1. Cover Removal/Installation. 5. Remove the Left Cover by using a flat head screwdriver to unhook the locking clasps located in Figure 5-1. All clasps but one can be accessed from under the Base. The clasp located near the AC input plug can be reached with a #1 flathead screwdriver inserted into the slot between the Base and the Cover above and to the left of the AC plug on the back of the printer. See insert on Figure 5-1. Carefully lift off the Cover. 1.
Croma24 Service Manual Remove the MPCB (Main Printed Circuit Board) and Actuator Assembly Integrated circuits may become weakened or damaged by electrical discharge. Do not touch or work near integrated circuits without wearing an ESD wrist strap. 1. Perform steps 1 through 4 of the Left, Middle, and Right Cover Removal procedures to remove the Middle and Right covers. 2. Remove the three screws and washers securing the Actuator Assy and the MPCB. 3. Lift out the Actuator Assy. 4.
Croma24 Service Manual 11. Using care, remove the MPCB by bringing it out the front of the printer. Failure to use an approved anti-static bag for storage or shipment may cause damage to the MPCB and affect the Warranty. 12. Place the MPCB in an ESD bag (anti-static bag) in preparation for shipment to ENCAD for replacement or repair, or if it is to be stored at your facility for repair. Install the MPCB and Actuator Assembly Integrated circuits may become weakened or damaged by electrical discharge.
Croma24 Service Manual 6. Connect the Servo Motor connector to J4 on the MPCB. 7. Connect the Power Supply connector to J5 on the MPCB. 8. Connect the Stepper Motor connector to J7 on the MPCB. 9. Connect the Fan connector to J3 on the MPCB. 10. Connect and lock the Trailing Cable connector to J6 on the MPCB. 11. Reinstall the Middle and Right Covers by performing steps 2 through 4 of the Reinstall the Left, Middle, and Right Covers procedure. Remove Servo Motor 1.
Croma24 Service Manual 4. Move the Carrier Belt to the left so it is out of the way of the Servo Motor pulley. 5. Move the Carrier Assembly to the left end of the Slide Shaft. Integrated circuits may become weakened or damaged by electrical discharge. Do not touch or work near integrated circuits without wearing an ESD wrist strap. 6. Put on an ESD wrist strap. 7.
Croma24 Service Manual Install Servo Motor Integrated circuits may become weakened or damaged by electrical discharge. Do not touch or work near integrated circuits without wearing an ESD wrist strap. 1. Put on an ESD wrist strap. 2. Reinsert the Servo Motor under the Platen with the connector facing the FRONT side of the Platen. Guide the pulley up through the opening in the Platen. 3.
Croma24 Service Manual 11. Perform the Reinstall the Left, Middle, and Right Covers procedures to reinstall the Left, Middle and Right Covers. Remove the Carrier Assembly, Carrier Belt, and the Frame Tensioner ASSEMBLY/ DISASSEMBLY Figure 5-3. Electronics Cover Removal. 1. Perform the Left, Middle, and Right Cover Removal procedures to remove the Left, Middle and Right Covers. 2. Remove the Cutter Actuator by reaching under the Platen and releasing the actuator support tabs. 3.
Croma24 Service Manual 4. Lift up on the front left side of the Electronics Cover until it comes part way off of the Carrier Assembly. Then lift up on the front right side of the Electronics Cover and move the Electronics Cover slightly to the left so that the back of it clears the Trailing Cable Support Assembly. See Figure 5-3. 5. Lift up on the connector lock to unlock the Trailing Cable connector (J1) on the Carrier PCB and remove the end of the Trailing Cable. Figure 5-4.
Croma24 Service Manual 9. Push the Carrier Belt through the Frame Tensioner enough to remove the Idler Pulley Assembly from the Frame Tensioner, and then set aside the Idler Pulley Assembly and the Frame Tensioner. (See Figure 5-6 for part identification, if necessary.) 10. Slide the Carrier Assembly and Drive Belt off the left side of the Slide Shaft. Figure 5-5. Carrier Belt Clamp. 11. Once the Carrier Assembly is removed from the Slide Shaft, turn it over so that you can see the Belt Clamp.
Croma24 Service Manual Failure to use an approved anti-static bag for storage or shipment may cause damage to the MPCB and affect the Warranty. 14. Place the Carrier Assembly in an ESD (anti-static) bag in preparation for shipment to ENCAD for replacement or repair, or if it is to be stored for repair at your facility. Install the Carrier Assembly, Carrier Belt, and the Frame Tensioner 1.
Croma24 Service Manual 7. Insert the Strain Relief (with Trailing Cable) onto the Carrier Assembly by sliding it onto the Strain Relief Support until it snaps firmly into place. See Figure 5-4. 8. Place the Trailing Cable into the J1 connector lock on the Carrier PCB. Make sure the silver fingers on the Trailing Cable are fully inserted into the lock and slide both sides of the connector lock shut at the same time. 9.
Croma24 Service Manual 13. Once the Idler Pulley Assembly is in position, pinch the belt to hold the Idler Pulley Assembly in place and pull it into the Frame Tensioner so that the axle rests in the V-shaped groove in the Frame Tensioner. 14. Insert the Compression Spring into the opening in the back of the Frame Tensioner so that the end of the spring fits over the post inside the opening. 15. Fit the Compression Spring over the post at the back of the CBracket. 16.
Croma24 Service Manual 4. Unlock the latch on the right end of the Carrier Assembly and lift up the right end of the Carrier PCB. See Figure 5-7. 5. Slide the Carrier PCB to the right to remove the tab on the left end of the Carrier PCB from the slot in the Carrier Assembly. Assembly\Disassembly 101 ASSEMBLY/ DISASSEMBLY Figure 5-7. Carrier PCB Removal/Installation.
Croma24 Service Manual Failure to use an approved anti-static bag for storage or shipment may cause damage to the Carrier PCB and affect the Warranty. 6. Place the Carrier PCB in an ESD bag (anti-static bag) in preparation for shipment to ENCAD for replacement or repair, or if it is to be stored at your facility for repair. Install the Carrier PCB 1. Put the tab on the left end of the Carrier PCB into the slot in the left side of the Carrier Assembly. See Figure 5-7. 2.
Croma24 Service Manual Figure 5-8. Paper and Encoder Sensor Removal. 2. To remove the Paper Sensor: a. Unlock the connector at J3 and remove the flex cable. c. Pull straight up on the Paper Sensor and remove it from the Carrier Assembly. 3. To remove the Encoder Sensor: a. Unlock the connector at J2 and remove the flex cable. b. Turn the Carrier Assembly over and lay it with the top side facing down. c.
Croma24 Service Manual the Encoder clear the ridges which hold it in place. Then pull it straight out. See Figure 5-8. Install the Paper Sensor or the Encoder Sensor Figure 5-9. Paper and Encoder Sensor Installation. 1. To install the Paper Sensor: a. Turn the Carrier Assembly so that the bottom side of it is facing up. b. Route the flex on the Paper Sensor through the slot in the Carrier Assembly. Make sure the flex cable goes all the way through and does not curl under the Carrier PCB. c.
Croma24 Service Manual e. Turn the Carrier Assembly over and insert the Paper Sensor flex cable into the connector at J3. f. Push both sides of the connector lock shut at the same time. 2. To install the Encoder Sensor: a. Turn the Carrier Assembly so that the bottom side of it is facing up. b. Push down on the plastic clip and slide the back of the Encoder Sensor over it. c. Push the Encoder Sensor in past the ridges until the Encoder Sensor snaps into place. d.
Croma24 Service Manual 4. Remove the Trailing Cable from the triangular portion of the Strain Relief. 5. Lift up on the short end of the tape and unfold the bend in the Trailing Cable. 6. Remove the Strain Relief by pushing the Trailing Cable down through the opening in the Strain Relief. 7. Disconnect the Trailing Cable connector at the J6 location on the MPCB. Use the thumb and forefinger to pull forward on the connector lock and remove the Trailing Cable from the connector. See Figure 3-6 if necessary.
Croma24 Service Manual 8. Using a #2 Phillips screwdriver, remove the three screws and washers securing the Trailing Cable Cover Assembly to the CBracket Assembly. See Figure 5-10. 9. With the Carrier Assembly in the far right position (if still installed), carefully slide the Trailing Cable Cover left until it clears the back of the Carrier Assembly. Then lift the Trailing Cable Assembly out of the printer. Install the Trailing Cable Cover Assembly 1.
Croma24 Service Manual 7. Insert the Strain Relief (with Trailing Cable) onto the Carrier Assembly by sliding it onto the Strain Relief Support until it snaps firmly into place. See Figure 5-4. Replacing the Carrier Bushings 1. Perform the Carrier Assembly, Carrier Belt, and the Frame Tensioner Removal procedures to remove the Carrier Assembly from the Slide Shaft. Figure 5-11. Carrier Bushing Removal. 2. Use a flat tip screwdriver to push up on the latch which holds the Carrier Bushing in place.
Croma24 Service Manual Figure 5-12. Carrier Bushing Installation. 5. Orient the new Bushing as shown in Figure 5-12 so that the metal tab on top of the Bushing goes into the Carrier Assembly first. 6. Push the Bushings in until they snap into place. 7. Perform the Reinstall the Carrier Assembly, Carrier Belt, and the Frame Tensioner procedures to reinstall the Carrier Assembly.
Croma24 Service Manual Remove the Service Station, Seals, and Wipers Figure 5-13. Service Station, Exploded View. 1. Place the Middle Cover in the open position. 2. Move the Carrier Assembly to the left side of the Slide Shaft. 3. Reach into the Right Cover and pull back on the Service Station release tab located on the far side of the Service Station. See Figure 5-13. 4. Raise the right side of the Service Station out of the Platen. 5.
Croma24 Service Manual farther to the right might be required to release the left side of the Service Station. 6. To remove a Service Station Wiper, lift the Wiper up and off of the Wiper support. 7. To remove a Service Station Seal: a. Disconnect the Sled spring from the post on the bottom of the Service Station Sled. See Figure 5-13. b. Slide the Service Station Sled to the right and up until it is removed from the Service Station Base. c.
Croma24 Service Manual 3. Position the Service Station inside the Right Cover and place the left side of the Service Station into the Platen. 4. Push down on the right side of the Service Station until the Service Station snaps into place. 5. Slide the Carrier Assembly to the right and back into the home position. 6. Lower the Middle Cover. Remove the Lower Roller Assembly and Stepper Motor 1.
Croma24 Service Manual . retnirp ASSEMBLY/ DISASSEMBLY Figure 5-14. C-Bracket Assembly and Platen Removal.
Croma24 Service Manual 7. Remove the C-Bracket Assembly by removing the four attaching screws. See Figure 5-14. 8. Using a #2 Phillips screwdriver, remove the grounding strap on the left side of the Slide Shaft. 9. Remove the Slide Shaft using a 3mm hex head driver. 10. Disconnect the Lower Drive Shaft Assembly from the Platen by removing the 4 attaching screws. See Figure 5-14. 11. Remove the Platen by releasing the 4 securing tabs (2 on each side) and six screws. Gently lift the Platen off of the Base.
Croma24 Service Manual Install the Lower Roller Assembly and Stepper Motor NOTE Ensure that the stepper motor wires are exiting the motor casing in the “down” direction when completely installed. The wires should be opposite from the holes that secure the bracket to the platen. 1. Loosely attach the Stepper Motor to the Lower Roller bracket using Stepper Motor hardware as shown in Figure 5-15. 2. Attach the Stepper Motor tension spring to the Stepper Motor and the Lower Roller Bracket.
Croma24 Service Manual Figure 5-16. Installing Lower Roller Assembly. 3. Lower the Lower Roller Assembly into the Base of the printer by aligning the bracket guides with the base guide tracks. See Figure 5-16. 4. Slide the Lower Roller Assembly to the right until the left lower roller bracket is snug against the bracket stop guide. 5. Route the Stepper Motor wires through the wire access area and to the wire clamp. Attach the connector to J7 on the MPCB.
Croma24 Service Manual 6. Route the Stepper Motor ground strap through the wire access area and to the wire clamp. Attach onto the back of the MPCB. 7. Carefully snap the Platen onto the printer Base. Ensure that the ground straps for the Slide Shaft and C-Bracket are coming through the holes in the Platen. 8. Secure the Lower Roller Assembly onto the Platen. 9.
Croma24 Service Manual 6. Disconnect the Trailing Cable from J6 on the MPCB and remove the Trailing Cable Cover Assembly. 7. Disconnect the Servo Motor cable from J4 on the MPCB and remove the Servo Motor. 8. Remove the C-Bracket Assembly. 9. Using a #2 Phillips screwdriver, remove the grounding strap on the left side of the Slide Shaft. 10. Remove the Slide Shaft using a 3mm hex head driver. 11. Disconnect the Lower Drive Shaft Assembly from the Platen by removing the 4 attaching screws. 12.
Croma24 Service Manual 17. Disconnect the AC Entry Module from the Power Supply Board by disconnecting cable from TB1. 18. Remove 4 screws and washers securing power supply board and remove power supply board. Remove grounding wire to the AC Entry Module from the mounting screw on the power supply lower cover. 19. Remove AC Entry Module by unsnapping from the power supply base. ASSEMBLY/ DISASSEMBLY Figure 5-18. Power Supply Assembly.
Croma24 Service Manual Install the Power Supply and AC Entry Module 1. Insert the AC Entry Module by snapping it into the Power Supply base. 2. Install Power Supply board into the Power Supply base using four mounting screws and washers. Attach the ground wire from the AC Entry Module to the lower Power Supply cover mounting screw. 3. Connect the AC Entry Module plug into TB1 on the Power Supply board. 4. Attach the Power Supply cable to the TB2 connector on the Power Supply board. 5.
Croma24 Service Manual 12. Secure the Lower Roller Assembly onto the Platen. 13. Attach the C-Bracket Assembly to the Platen by aligning the bracket onto the bracket guide pins and securing with attaching hardware. Ensure that the Pinch Rollers are centered on the lower rollers and that tension is being applied the the lower rollers. 14. Attach the Slide Shaft to the supports tightening to 15 in-lbs of torque using 3mm hex head torque screwdriver. 15.
Croma24 Service Manual This Page Intentionally Left Blank 122 Assembly\Disassembly
Parts List 6 This chapter lists the items and their associated numbers for the parts and assemblies of the Croma24 printers that are field replaceable. The list is in order of part name as identified in the assembly/disassembly chapter. This list is to be used in conjunction with the assembly/disassembly procedures to aquire the necessary parts and properly install them into the printer. The parts and asssemblies may be ordered through your local authorized dealer or ENCAD, Inc.
Croma24 Service Manual FIGURE ITEM PART NAME PART # 6-2 3 ACTUATOR, MPCB................................ 207030 6-2 4 MAIN PRINTED CIRCUIT BOARD ..... 207047 6-2 5 LOWER DRIVE SHAFT ASSY .............. 206479 6-2 6 FAN ASSEMBLY .................................... 203443 6-2 7 POWER SUPPLY ASSEMBLY .............. 207042 6-2 8 ROLLGUIDE ASSY, RIGHT ................. 204969-5 6-2 9 ROLLGUIDE ASSY, LEFT .................... 206828-4 6-2 10 FEET .......................................
Croma24 Service Manual PARTS LIST Figure 6-1. Croma24 Assembly Parts (Platen and Above).
Croma24 Service Manual Figure 6-2. Croma24 Assembly Parts (Below Platen).
Croma24 Service Manual PARTS LIST Figure 6-3. Carrier Assembly Breakdown.
Croma24 Service Manual Figure 6-4. C-Bracket Assembly Breakdown.
Croma24 Service Manual PARTS LIST Figure 6-5. Lower Roller Assembly Breakdown.
Croma24 Service Manual This Page Intentionally Left Blank 130 Parts List
Index L axis drive carrier . . 28 paper (media) . . 27 language emulation . . 20 line accuracy . . 20 linear encoder strip . . 46 lower roller assembly . . 112 B banding . . 84 hardware or software . . 53 built in test (BIT) . . 75 C cabling . . 77 calibration color . . 55 deadband . . 56, 67 head height . . 60 X-axis . . 57 carrier assembly . . 95 carrier axis failure . . 81 carrier bushings . . 108 cartridges . . 47, 55 cautions . . 19 control panel . . 40, 65 M media does not move . .
Croma24 Service Manual S V scheduled maintenance . . 43 service station . . 45, 110 servo motor . . 92 signal flow . . 77 skewing . . 57 stepper motor . . 112 version CAD only . . 17 GA & CAD . . 17 GA (Graphic Arts) . . 17 T warnings . . 19 technical specifications . . 20 technical support ENCAD BBS . . 23 ENCAD website . . 23 help desk FAX # . . 23 telephone # . . 23 tests carriage vibration . . 70 color . . 70 fan . . 69 keypad . . 71 LED . . 72 paper sensor . . 69 print quality . .
