Page 6 - VDE Statement
6 Croma24 Service Manual VDE Statement Hiermit wird bescheinigt, daß der CROMA24 in Übereinstimmung mit den Bestimmungen der BMPT-AmstbIVfg 234/1991 funkentstört ist. Dervorschriftsmäßige Betrieb mancher Geräte (z.B. Meßsender) kannallerdings gewissen Einschränkungen unterliegen. Beachten Siedeshalb...
Page 7 - Material Safety Data Sheet
7 Croma24 Service Manual Material Safety Data Sheet CROMA24 QIS (Quality Image Supplies) ink is nonhazardous, requiringno special disposal handling. It can be harmful if swallowed and shouldbe kept away from children. To obtain a Material Safety Data Sheet, contact ENCAD, Inc. at: 6059 Cornerstone C...
Page 8 - WARRANTY OR DAMAGE CLAIMS
8 Croma24 Service Manual WARRANTY OR DAMAGE CLAIMS United States ENCAD ® , Inc., warrants its printers ("P RODUCT ") to be free from defects in workmanship and materials for a period of one year from the date of purchase. In order to submit aWarranty claim, please contact the ENCAD Help Desk...
Page 9 - Table of Contents
9 Croma24 Service Manual Table of Contents Chapter 1 General Description ............................................................. 17 Introduction ............................................................................................................... 17Overview .............................
Page 13 - List of Illustrations
13 Croma24 Service Manual List of Illustrations Figure Page Chapter 1 General Description Chapter 2 Theory of Operation 2-1. General Block Diagram ................................................................................... 26 2-2. Paper (Media) Axis Drive .......................................
Page 16 - List of Tables
16 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. Pinch Roller Adjustments .............................
Page 17 - General Description; Introduction
1 GENERAL DESCRIPTION 17 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 Printerfamily: CAD version GA & CAD version GA version f o r : CAD market GA & CAD GA I/O: ...
Page 18 - Overview; Electrostatic Discharge (ESD) Sensitivity
18 General Description Croma24 Service Manual plotters to respond to and anticipate our customers’ needs. Principalfeatures are summarized below. Three Versions: CAD, GA (Graphic Arts), GA & CADENCAD’s software RIP supplied with the GA (Graphic Arts) versionRemotely Configured via Host Computer2...
Page 19 - NOTE
General Description 19 GENERAL DESCRIPTION Croma24 Service Manual Warnings, Cautions, and Notes Warnings, cautions, and notes are used when additional informa-tion, instructions, or care should be observed. In this manual,warnings cautions, and notes precede the text to which each ap-plies. The defi...
Page 20 - Printer Specifications
20 General Description Croma24 Service Manual Printer Specifications The specifications and performance characteristics of the Croma24Color Inkjet Printers are as follows: Max Printing Area: Norm 23.8” 60.9cm Extend 24.6” 62.9cm Language Emulation: ENCAD RTL Buffer: 2 MB permanentlyinstalled(not upg...
Page 21 - Contents of this Service Manual
General Description 21 GENERAL DESCRIPTION Croma24 Service Manual Contents of this Service Manual Figures are used in this manual to clarify procedures. They arefor illustrative purposes only and may not necessarily be drawn toscale. Material in this manual may be repeated in various sections sothat...
Page 23 - Technical Support
General Description 23 GENERAL DESCRIPTION Croma24 Service Manual Technical Support ENCAD offers full technical support and service for its variousproducts. If you are unable to find the answer to your question ineither the User’s Guide, Service Manual, or other related publica-tions, check out ENCA...
Page 25 - Theory of Operation
2 THEORY OF OPERA TION 25 Introduction This chapter explains the mechanical and electrical theory of opera-tion of the ENCAD Croma24 D-Size Color Inkjet printer. The Croma24 is a MC68322 microprocessor-based digital printerthat receives plotting instructions from a host computer througheither the RS...
Page 28 - The Carrier Axis Drive
28 Theory of Operation Croma24 Service Manual The Carrier Axis Drive Figure 2-3. Carrier Axis Drive. The Carrier Axis Drive moves the printer’s carrier assembly alongthe length of the printer. The drive consists of a servo motor, linearencoder strip, drive belt, and tension assembly. These items are...
Page 30 - Microprocessor
30 Theory of Operation Croma24 Service Manual Microprocessor The microprocessor (a Motorola MC68322) is the central processorunit which supervises system functions, executes the printer firm-ware, manipulates data, and controls input/output data busses. Ithas a built-in parallel port, a two channel ...
Page 31 - Memory Circuits; Flash EEPROM
Theory of Operation 31 THEORY OF OPERA TION Croma24 Service Manual The gate array contains the hardware logic for dot firing, monitor-ing changes in the Carrier Assembly position, controlling DMA forthe serial port, and generating the PWM (Pulse Width Modulation)waveforms for the servo controller. T...
Page 32 - DRAM
32 Theory of Operation Croma24 Service Manual The system firmware is stored in Flash EEPROM and can be up-graded by opening the Control Panel located on the host computer.Once the Control Panel has been executed, it first starts an initial-ization and status communication sequence with the printer. ...
Page 33 - Stepper Motor Controller
Theory of Operation 33 THEORY OF OPERA TION Croma24 Service Manual Stepper Motor Controller Figure 2-6. Stepper Motor Controller. The media is driven by a Stepper Motor, which drives the media ina direction perpendicular to the length of the printer. The mediain the printer can advance forward and b...
Page 34 - Servo Motor Controller
34 Theory of Operation Croma24 Service Manual 2. Motor current sense The voltage across a series current sense resistor is measuredand level shifted so that it is centered around 5 V. 3. Comparator This portion divides the output of the reference waveform gen-erator by two and compares it to the out...
Page 37 - Carrier Assembly Circuits
Theory of Operation 37 THEORY OF OPERA TION Croma24 Service Manual Carrier Assembly Circuits Figure 2-10. Carrier Assembly Circuits. The Carrier Assembly contains: 1) Carrier PCB2) Optical Sensors3) Paper Sensor4) Inkjet Cartridges The Carrier PCB contains the logic and drive circuitry for the firin...
Page 38 - Power Supply; System Grounding
38 Theory of Operation Croma24 Service Manual also constantly monitors the media during printing to determine ifthe media has run out. If no paper is sensed, the paper sensor sends this information to theMPCB, which immediately begins an ‘out of paper’ subroutine. Thissubroutine starts the LEDS on t...
Page 40 - Front Key Controls
40 Theory of Operation 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 sideof the printer and consists of five controls and two LED indicators.The controls are (from left to right): B...
Page 43 - Maintenance
3 MAINTENANCE 43 Maintenance Introduction This chapter contains general maintenance and cleaning instruc-tions for the Croma24 printer. Scheduled Maintenance Scheduled maintenance consists of a list of checks that are plannedto be performed on a regular basis or when conditions warrant it. Scheduled...
Page 44 - Cleaning Procedures
44 Maintenance Croma24 Service Manual Cleaning Procedures Always turn the printer OFF, remove the power cordand the interface cable before cleaning the printer. Anelectrical shock hazard may be present if these proce-dures are not followed. External Cleaning Do not use abrasive cleansers of any sort...
Page 45 - Service Station Cleaning
Maintenance 45 MAINTENANCE Croma24 Service Manual Printer problems can be caused by an accumulation of dirt or othercontamination on the slide shaft. This contamination may lead todrag on the carrier. Extreme drag results in a “carrier axis failure”fault and will stop the carrier motion. These probl...
Page 46 - Linear Encoder Strip Cleaning
46 Maintenance Croma24 Service Manual 4. Using a cotton swab dampened with distilled water, wipe theseals and the rubber wiper in the service station until nomore ink residue or dust can be removed. 5. With a dry swab, wipe all moisture from the seals andwipers. 6. Close the cover and reconnect the ...
Page 47 - Cartridge Dimple Cleaning
Maintenance 47 MAINTENANCE Croma24 Service Manual Cartridge Dimple Cleaning Figure 3-2. Cartridge Dimple Region. The cartridge dimple area can easily be contaminated by oils anddirt on fingers and hands or ink spilled onto them. This causes thecartridges to not receive some of the electrical signals...
Page 48 - Flex Cable Contact Cleaning; Clean and Inspect Stepper Motor Gears
48 Maintenance 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 easeof which this area can become dirty. This also causes the cartridgesto not receive all of the electrical signals for a proper firin...
Page 49 - Clean and Inspect MPCB
Maintenance 49 MAINTENANCE Croma24 Service Manual gears with a stiff brush to knock off any debris. A cotton swabsoaked with isopropyl alcohol can be used to remove any ink thatmay have accumulated on the gears. Clean and Inspect MPCB Foreign material on the MPCB could short out electrical signalsbe...
Page 50 - Reseat Connectors on MPCB and Carrier Board
50 Maintenance Croma24 Service Manual Reseat Connectors on MPCB and Carrier Board Integrated circuits may become weakened or damagedby electrical discharge. Do not touch or work near in-tegrated circuits without wearing an ESD wrist strap. Ribbon connectors can be easily damaged if incorrectlyhandle...
Page 52 - Replace Carrier Bushings; Servo Motor Winding Resistance Check
52 Maintenance Croma24 Service Manual Replace Carrier Bushings The carrier bushings are rated for approximately 1500 hours ofoperational usage. Given an average of about 3 hours a day ofprinting for 104 weeks, results in 1560 hours. Therefore, it is safe toapproximate 1500 hours into 2 years of cont...
Page 53 - Stepper Motor Winding Resistance Check; Banding: Hardware vs Software
Maintenance 53 MAINTENANCE Croma24 Service Manual Stepper Motor Winding Resistance Check Figure 3-8. Stepper Motor. 1. Disconnect the stepper motor connection from the MPCB. 2. Using a standard ohmmeter or multimeter, measurebetween pins 1 (yellow wire) and 3. 3. The reading should indicate 7.2 - 8....
Page 55 - Alignments/Adjustments; Color Calibration
Maintenance 55 MAINTENANCE Croma24 Service Manual Alignments/Adjustments The ENCAD Croma24 printers are designed with a minimum ofmaintenance requirements in mind. Most of the adjustments arecontrolled and performed via software/firmware interaction thatrequire you to run a subroutine and enter valu...
Page 56 - Deadband Alignment
56 Maintenance Croma24 Service Manual The “Current Heads (Y, M, C)” view represents the alignment of theheads as they are currently entered. This is just an overview of allheads and how they are aligned. Do not attempt to align the headsusing this view. The “Color Horizontal Head-to-Head Calibration...
Page 57 - Pinch Roller Adjustment Procedure
Maintenance 57 MAINTENANCE Croma24 Service Manual X-Axis Calibration The X-axis calibration procedure ensures that the processing thatdrives the stepper motor is correct to minimize line length accuracyerrors. Pinch Roller Adjustment Procedure The purpose of the Paper Skew Adjustment is to make cert...
Page 60 - Head Height Alignment Procedure
60 Maintenance Croma24 Service Manual Figure 3-15. Upper Roller Adjustment. Figure 3-15 shows how the motion (rapid drifting to the right or tothe left) of the roller determines which mounting screw should betightened in order to eliminate the motion of the roller so that theroller stays in the cent...
Page 65 - Croma24 Control Panel
Maintenance 65 MAINTENANCE Croma24 Service Manual Croma24 Control Panel During the installation procedures for the Croma24 , a softwareControl Panel for this printer is installed onto the computer. Thiscontrol panel provides a means to monitor and adjust certain vari-ables utilized by the printer. T...
Page 66 - Manufacturing Menu
66 Maintenance 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 isdivided into 3 submenus: ManufacturingDiagnosticsService Options Manufacturing Menu Figure 3-22. Manufacturin...
Page 67 - Print Quality Test
Maintenance 67 MAINTENANCE Croma24 Service Manual The Manufacturing Submenu (Figure 3-22) consists of two proce-dures: Print Quality TestDeadband The procedures are primarily used in the manufacturing processand is adjusted correctly before it leaves the plant. They are alsoavailable to the field te...
Page 68 - Diagnostics Menu
68 Maintenance Croma24 Service Manual Figure 3-24. Deadband Slow/Fast Display. Figure 3-24 shows what the display will look like when printingeither the fast or slow test if it is out of alignment. A correctlyaligned printer will appear as if there is only a series of vertical linesprinted. No diffe...
Page 69 - Paper Sensor Test
Maintenance 69 MAINTENANCE Croma24 Service Manual The Diagnostics Menu as seen in Figure 3-25 consists of eighttests: Paper Sensor TestFan TestCarrier Vibration TestColor TestKeypad TestLED TestServo Motor TestPaper Motor Test Paper Sensor Test The Paper Sensor Test checks the operation of the optic...
Page 70 - Carriage Vibration Test
70 Maintenance Croma24 Service Manual Carriage Vibration Test The Carriage Vibration Test prints 5 sets of 3 parallel lines to testthe 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 testfor ban...
Page 71 - Keypad Test
Maintenance 71 MAINTENANCE Croma24 Service Manual Keypad Test Figure 3-29. Keypad Test. The Keypad Test checks the keypads on the MPCB. The keypadsare the microswitches that are activated whenever one of the tabson the actuator is depressed. Each time a switch is activated and hold for a few seconds...
Page 72 - LED Test
72 Maintenance 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 30minutes, or 1 hour. LED Test Figure 3-30. LED Test. The LED Test lights both LEDs on the printer. The test is selectablein...
Page 73 - Paper Motor Test
Maintenance 73 MAINTENANCE Croma24 Service Manual The Servo Motor Test tests the servo motor by moving the carrierback and forth across the slide shaft. Speed is selectable to eitherslow or fast. The number of cycles the carrier does is selectablebetween 0 and 10,000 cycles. Paper Motor Test Figure ...
Page 74 - Service Menu
74 Maintenance 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, anddate and time of development. This information helps the technicianby providing a means of ...
Page 76 - Firmware/Software Upgrades
76 Maintenance Croma24 Service Manual To enter the BIT mode, apply power to the printer while simulta-neously depressing the ‘soft on’ button. Continue to hold onto the‘soft on’ button until the carrier assembly has traveled halfwayacross the length of the platen. Release the ‘soft on’ button. The p...
Page 77 - Internal Cabling and Signal Flow Diagram
Maintenance 77 MAINTENANCE Croma24 Service Manual The latest firmware version was included and installed onto thecomputer during the installation process. To upgrade the firm-ware on the printer, open the Control Panel with the printeronline. During the initial start up of the Control Panel, it comm...
Page 79 - Troubleshooting
4 TROUBLE- SHOOTING 79 Troubleshooting No Power • faulty power replace power cord cord • AC input not replace AC entry present at power module supply Introduction Chapter 4, Troubleshooting consists of a table that is intended toaide the technician in troubleshooting the Croma24 printer. Thistable a...
Page 89 - Install the Left, Middle, and Right Covers
Assembly\Disassembly 89 ASSEMBL Y/ DISASSEMBL Y Croma24 Service Manual Figure 5-1. Cover Removal/Installation. 5. Remove the Left Cover by using a flat head screwdriver tounhook the locking clasps located in Figure 5-1. All clasps butone can be accessed from under the Base. The clasp locatednear the...
Page 90 - Remove the MPCB (Main Printed Circuit Board)
90 Assembly\Disassembly Croma24 Service Manual Remove the MPCB (Main Printed Circuit Board) and Actuator Assembly Integrated circuits may become weakened or damagedby electrical discharge. Do not touch or work near in-tegrated circuits without wearing an ESD wrist strap. 1. Perform steps 1 through 4...
Page 91 - Install the MPCB and Actuator Assembly
Assembly\Disassembly 91 ASSEMBL Y/ DISASSEMBL Y 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 storageor shipment may cause damage to the MPCB and af-fect the Warranty. 12. Place the MPCB in an ESD ba...
Page 92 - Remove Servo Motor
92 Assembly\Disassembly 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 ...
Page 94 - Install Servo Motor
94 Assembly\Disassembly Croma24 Service Manual Install Servo Motor Integrated circuits may become weakened or damagedby electrical discharge. Do not touch or work nearintegrated circuits without wearing an ESD wrist strap. 1. Put on an ESD wrist strap. 2. Reinsert the Servo Motor under the Platen wi...
Page 95 - Remove the Carrier Assembly, Carrier Belt, and
Assembly\Disassembly 95 ASSEMBL Y/ DISASSEMBL Y 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 Figure 5-3. Electronics Cover Removal. 1. ...
Page 98 - Install the Carrier Assembly, Carrier Belt, and the
98 Assembly\Disassembly Croma24 Service Manual Failure to use an approved anti-static bag for storageor shipment may cause damage to the MPCB and af-fect 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 i...
Page 100 - Remove the Carrier PCB
100 Assembly\Disassembly 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 theFrame Tensioner so that the axle rests in the V-shaped groovein the Frame Tensioner. 14. Insert the Compression Spring into...
Page 102 - Install the Carrier PCB; Remove the Paper Sensor or the Encoder Sensor
102 Assembly\Disassembly Croma24 Service Manual Failure to use an approved anti-static bag for storageor shipment may cause damage to the Carrier PCBand affect the Warranty. 6. Place the Carrier PCB in an ESD bag (anti-static bag) inpreparation for shipment to ENCAD for replacement or repair,or if i...
Page 104 - Install the Paper Sensor or the Encoder Sensor
104 Assembly\Disassembly Croma24 Service Manual the Encoder clear the ridges which hold it in place. Then pull itstraight 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 Assembl...
Page 105 - Remove the Trailing Cable Cover Assembly
Assembly\Disassembly 105 ASSEMBL Y/ DISASSEMBL Y 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 s...
Page 107 - Install the Trailing Cable Cover Assembly
Assembly\Disassembly 107 ASSEMBL Y/ DISASSEMBL Y Croma24 Service Manual 8. Using a #2 Phillips screwdriver, remove the three screws andwashers securing the Trailing Cable Cover Assembly to the C-Bracket Assembly. See Figure 5-10. 9. With the Carrier Assembly in the far right position (if stillinstal...
Page 108 - Replacing the Carrier Bushings
108 Assembly\Disassembly Croma24 Service Manual 7. Insert the Strain Relief (with Trailing Cable) onto the CarrierAssembly by sliding it onto the Strain Relief Support until itsnaps firmly into place. See Figure 5-4. Replacing the Carrier Bushings 1. Perform the Carrier Assembly, Carrier Belt, and t...
Page 110 - Remove the Service Station, Seals, and Wipers
110 Assembly\Disassembly 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 ...
Page 111 - Install the Service Station, Seals, and Wipers
Assembly\Disassembly 111 ASSEMBL Y/ DISASSEMBL Y Croma24 Service Manual farther to the right might be required to release the left sideof the Service Station. 6. To remove a Service Station Wiper, lift the Wiper up and offof the Wiper support. 7. To remove a Service Station Seal: a. Disconnect the S...
Page 112 - Remove the Lower Roller Assembly and Stepper
112 Assembly\Disassembly Croma24 Service Manual 3. Position the Service Station inside the Right Cover and placethe left side of the Service Station into the Platen. 4. Push down on the right side of the Service Station until theService Station snaps into place. 5. Slide the Carrier Assembly to the ...
Page 115 - Install the Lower Roller Assembly and Stepper
Assembly\Disassembly 115 ASSEMBL Y/ DISASSEMBL Y Croma24 Service Manual Install the Lower Roller Assembly and Stepper Motor NOTE Ensure that the stepper motor wires are exiting themotor casing in the “down” direction when completelyinstalled. The wires should be opposite from the holesthat secure th...
Page 117 - Remove the Power Supply and AC Entry Module
Assembly\Disassembly 117 ASSEMBL Y/ DISASSEMBL Y Croma24 Service Manual 6. Route the Stepper Motor ground strap through the wire accessarea and to the wire clamp. Attach onto the back of the MPCB. 7. Carefully snap the Platen onto the printer Base. Ensure thatthe ground straps for the Slide Shaft an...
Page 120 - Install the Power Supply and AC Entry Module
120 Assembly\Disassembly Croma24 Service Manual Install the Power Supply and AC Entry Module 1. Insert the AC Entry Module by snapping it into the PowerSupply base. 2. Install Power Supply board into the Power Supply base usingfour mounting screws and washers. Attach the ground wirefrom the AC Entry...
Page 123 - Parts List
6 P ARTS LIST 123 Parts List This chapter lists the items and their associated numbers for theparts and assemblies of the Croma24 printers that are field re-placeable. The list is in order of part name as identified in theassembly/disassembly chapter. This list is to be used in conjunction with the ...
Page 131 - Index
INDEX 131 Index A axis drive carrier . . 28 paper (media) . . 27 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 . . 95carrier axis failure . . 81carrier bushings ....
