Integra CROMA24 manual

CR OMA2 4 COL OR PRINTER SERVICE MANUAL ®[...]

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Croma24™ COLOR INKJET PRINTER SER VICE MANUAL Part Number 208817 ®[...]

4 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. No part of this manual may be copied or distributed, transmitted, transcribed, sto[...]

5 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 COMMUNICA TIONS COMMISION RADIO AND TELEVI- SION INTERFERENCE FOR CLASS B DEVICE This equipment has been tested and found to comply with [...]

6 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 Bedienungsanleitun[...]

7 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. T o obtain a Material Safety Data Sheet, contact ENCAD, Inc. at: 6059 Cornerstone Court West San Diego, CA 92121-3734 (619) 452-43[...]

8 Croma24 Service Manual W ARRANTY 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 a W arranty claim, please contact the ENCAD Help Desk at (619) 452-4350. ENCAD reserves the right[...]

9 Croma24 Service Manual T able of Contents Chapter 1 General Description ............................................................. 17 Introduction ............................................................................................................... 1 7 Overview .........................................................................[...]

10 Croma24 Service Manual Service Station Cleaning .............................................................................. 45 Linear Encoder Strip Cleaning ...................................................................... 46 Cartridge Dimple Cleaning ........................................................................... 47 Flex Cab[...]

11 Croma24 Service Manual T able of Contents (cont) Firmware/Software Upgrades .................................................................................... 76 Internal Cabling and Signal Flow Diagram ................................................................ 77 Chapter 4 T roubleshooting ...............................................[...]

12 Croma24 Service Manual T able of Contents (cont) Remove the Lower Roller Assembly and Stepper Motor ......................................... 1 12 Install the Lower Roller Assembly and Stepper Motor ............................................. 1 15 Remove the Power Supply and AC Entry Module ................................................... 1[...]

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 ................................................................................. 27 2[...]

14 Croma24 Service Manual 3-17. Setting Up T ools from Height Gauge Kit .......................................................... 61 3-18. Zeroing the Micrometer Gauge ........................................................................ 62 3-19. T est Cartridge Installed .........................................................................[...]

15 Croma24 Service Manual 5-10. Trailing Cable Assembly Removal/Installation ............................................... 106 5-1 1 . Carrier Bushing Removal .............................................................................. 108 5-12. Carrier Bushing Installation .......................................................................[...]

16 Croma24 Service Manual List of T ables T able 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 ..........................................................................[...]

1 GENERAL DESCRIPTION 17 General Description Intr oduction 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 GA & CAD version GA version for: CAD market GA & CAD GA I/O: parallel serial & parallel serial & parall[...]

18 General Description 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 [...]

General Description 19 GENERAL DESCRIPTION Croma24 Service Manual W arnings, 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 definition of each is provided below. WARNINGS - W[...]

20 General Description 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 Language Emulation: ENCAD RTL Buffer: 2 MB permanently installed (not upgradable) Power Requirements: Input Voltage:[...]

General Description 21 GENERAL DESCRIPTION Croma24 Service Manual Contents of this Service Manual Figures are used in this manual to clarify procedures. They are for illustrative purposes only and may not necessarily be drawn to scale. Material in this manual may be repeated in various sections so that each section can “stand alone”. This allow[...]

22 General Description 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[...]

General Description 23 GENERAL DESCRIPTION Croma24 Service Manual T echnical Suppor t ENCAD offers full technical support and service for its various products. If you are unable to find the answer to your question in either the User’s Guide, Service Manual, or other related publica- tions, check out ENCAD’s Technical Bulletins located on ENCAD?[...]

24 General Description Croma24 Service Manual This Page Intentionally Left Blank[...]

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 printer that receives plotting instructions from a host computer through either the RS-422 serial interface or the Centronics paralle[...]

26 Theory of Operation Croma24 Service Manual Figure 2-1. General Block Diagram.[...]

Theory of Operation 27 THEORY OF OPERA TION Croma24 Service Manual Paper (Media) Axis Drive Figure 2-2. Paper (Media) Axis Drive. The Paper (Media) Axis Drive moves the plotting media in a direc- tion perpendicular to the length of the printer. This friction drive utilizes a micro-step drive technology and consists of a stepper motor, reduction gea[...]

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 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, d[...]

Theory of Operation 29 THEORY OF OPERA TION Croma24 Service Manual Main Printed Circuit Board (MPCB) 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. Interface Circuits: Ser[...]

30 Theory of Operation Croma24 Service Manual Microprocessor The microprocessor (a Motorola MC68322) is the central processor unit which supervises system functions, executes the printer firm- ware, manipulates data, and controls input/output data busses. It has a built-in parallel port, a two channel DMA (Direct Memory Access) controller, timer mo[...]

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 for the serial port, and generating the PWM (Pulse Width Modulation) waveforms for the servo controller. The gate array is a Xilinx device. It is a stati[...]

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. The Control Panel requires ink levels and deadb[...]

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 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 S[...]

34 Theory of Operation 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 gen- erator by two and compares it to the output of the motor current sensor. Logic inside th[...]

Theory of Operation 35 THEORY OF OPERA TION 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. The optical encoder strip runs the length of the Stabilizer Bracket and contains 150 lines and spac[...]

36 Theory of Operation 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[...]

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 PCB 2) Optical Sensors 3) Paper Sensor 4) Inkjet Cartridges The Carrier PCB contains the logic and drive circuitry for the firing of the inkjet cartridges. It also establishes[...]

38 Theory of Operation 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 whil[...]

Theory of Operation 39 THEORY OF OPERA TION Croma24 Service Manual Figure 2-11. Croma24 System Ground Network (Left Side).[...]

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 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-[...]

Theory of Operation 41 THEORY OF OPERA TION Croma24 Service Manual Table 2-1. Front Key Control LED Codes.[...]

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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 planned to be performed on a regular basis or when conditions warrant it. Scheduled maintenance can be thought of as preventive mai[...]

44 Maintenance 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 proce- dures are not followed. External Cleaning Do not use abrasive cleansers of any sort on the sur- faces of the printer. Damage to th[...]

Maintenance 45 MAINTENANCE 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 cl[...]

46 Maintenance 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 [...]

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 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 se[...]

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 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 o[...]

Maintenance 49 MAINTENANCE 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 p[...]

50 Maintenance 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 in- tegrated circuits without wearing an ESD wrist strap. Ribbon connectors can be easily damaged if incorrectly handled. Observe extreme caution when handling the ri[...]

Maintenance 51 MAINTENANCE Croma24 Service Manual Figure 3-5. Carrier PCB Connection Locations. 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 [...]

52 Maintenance 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 th[...]

Maintenance 53 MAINTENANCE Croma24 Service Manual Stepper Motor W inding Resistance Check 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 [...]

54 Maintenance 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 move- ment that is possibly due to the stepper motor, lower drive shaft assembly, or the rollguides on the back of the printer. All these possible fau[...]

Maintenance 55 MAINTENANCE 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 inc[...]

56 Maintenance 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 align- ment of the nozzles[...]

Maintenance 57 MAINTENANCE 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 The purpose of the Paper Skew Adjustment is to make certain that the Pinch Roller in the Upper Roller Su[...]

58 Maintenance 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. AC TI ON RE S UL T 1. Turn mo unti ng screw coun t erclockw i se (ccw ) . 1. Screw i s loosened. 2. Turn mo unti ng screw clockw i se (cw ) . 2.[...]

Maintenance 59 MAINTENANCE Croma24 Service Manual Figure 3-13. Upper Roller Mounting. 3. If you loosen one of the mounting screws and the roller moves in one direction, and you need to move the roller in the opposite direction, tighten the screw that was loosened to its maximum torque (1 in.-Lbs. ± 0.5) BEFORE loosening the other screw to move the[...]

60 Maintenance 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 [...]

Maintenance 61 MAINTENANCE Croma24 Service Manual Figure 3-16. Carrier Head Height Tolerance. 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[...]

62 Maintenance 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[...]

Maintenance 63 MAINTENANCE 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. 7. While lifting up the measuring tip of the micrometer, slide the Carrier to the center of the[...]

64 Maintenance 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 3- 20. 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 stab[...]

Maintenance 65 MAINTENANCE Croma24 Service Manual Cr oma24 Contr ol 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 vari- ables utilized by the printer. These variables include: ink levels in the car[...]

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 is divided into 3 submenus: Manufacturing Diagnostics Service Options Manufacturing Menu Figure 3-22. Manufacturing Menu.[...]

Maintenance 67 MAINTENANCE Croma24 Service Manual The Manufacturing Submenu (Figure 3-22) consists of two proce- dures: 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[...]

68 Maintenance 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[...]

Maintenance 69 MAINTENANCE 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 The Paper Sensor Test checks the operation of the optical paper sensor. Once activated, a pop-up [...]

70 Maintenance 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 in[...]

Maintenance 71 MAINTENANCE Croma24 Service Manual Keypad Test Figure 3-29. 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 [...]

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 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[...]

Maintenance 73 MAINTENANCE 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 Figure 3-32. Paper Motor Test. The Paper Motor Test te[...]

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, and date and time of development. This information helps the technician by providing a means of identifying the firmware loaded on the printer. [...]

Maintenance 75 MAINTENANCE Croma24 Service Manual 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 T est (BIT) The Croma24 printer has a built in test mode which is used as[...]

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 halfway across the length of the platen. Release the ‘soft on’ button. The printer will go through its normal s[...]

Maintenance 77 MAINTENANCE Croma24 Service Manual The latest firmware version was included and installed onto the computer during the installation process. To upgrade the firm- ware on the printer, open the Control Panel with the printer online. During the initial start up of the Control Panel, it commu- nicates with the printer’s firmware. The C[...]

78 Maintenance Croma24 Service Manual Figure 3-36. Signal Wiring Diagram.[...]

4 TROUBLE- SHOOTING 79 T roubleshooting 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 to aide the technician in troubleshooting the Croma24 printer. This table addresses symptoms with their possible cause[...]

80 T roubleshooting Croma24 Service Manual Symptoms Possible cause Solution T able 4-1. T roubleshooting T able (cont). No Power (cont) • all DC output 1) check fuse on voltages not power supply present (see Figure 3-18 for voltages) 2) replace power supply • all DC voltages replace MPCB present at MPCB Media Does Not Move • perform Stepper r[...]

T roubleshooting 81 TROUBLE- SHOOTING Croma24 Service Manual Symptoms Possible cause Solution T able 4-1. T roubleshooting T able (cont). Carrier Axis Failure • dirty (or perform Slide Shaft lubricated) slide Cleaning procedure shaft • perform Servo replace servo motor Motor Winding Resistance check • check servo bad bearings - motor for smoo[...]

82 T roubleshooting Croma24 Service Manual Symptoms Possible cause Solution T able 4-1. T roubleshooting T able (cont). Carrier Axis Failure • cutter assembly replace cutter (cont) malfunction assembly • damaged carrier 1) check idler/ drive belt system tension assembly 2) check carrier belt Does Not Print • bad connection reseat cable betwee[...]

T roubleshooting 83 TROUBLE- SHOOTING Croma24 Service Manual Symptoms Possible cause Solution T able 4-1. T roubleshooting T able (cont). Ink Cartridge • cartridge dimple 1) perform Misfiring (cont) area dirty or Cartridge Dimple damaged Cleaning procedure 2) replace cartridge • cartridge not reseat cartridge seated correctly • bad cartridge [...]

84 T roubleshooting Croma24 Service Manual Symptoms Possible cause Solution T able 4-1. T roubleshooting T able (cont). Printer Output is Banding • if banding is 1) inspect and/or consistent replace stepper motor (perform Stepper Motor Winding Resistance Check ) 2) inspect and/or replace stepper motor gears and/or lower roller assembly 3) replace[...]

T roubleshooting 85 TROUBLE- SHOOTING Croma24 Service Manual Symptoms Possible cause Solution T able 4-1. T roubleshooting T able (cont). • flex cable 1) perform Flex contacts dirty or Cable Contact damaged Cleaning 2) replace carrier assembly • carrier belt is reinstall, check loose, too tight, tension assembly, worn, or damaged and/or replace[...]

86 T roubleshooting Croma24 Service Manual This Page Intentionally Left Blank[...]

5 ASSEMBL Y/ DISASSEMBL Y 87 AssemblyDisassembly Intr oduction Chapter 5 contains the procedures for removal and replacement of the C roma 24 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 r[...]

88 AssemblyDisassembly 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 [...]

AssemblyDisassembly 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 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 flathea[...]

90 AssemblyDisassembly 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 in- tegrated circuits without wearing an ESD wrist strap. 1. Perform steps 1 through 4 of the Left, Middle, and Right Cover Removal pr[...]

AssemblyDisassembly 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 storage or shipment may cause damage to the MPCB and af- fect the Warranty. 12. Place the MPCB in an ESD bag (anti-static bag) in preparation for shipment [...]

92 AssemblyDisassembly 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 t[...]

AssemblyDisassembly 93 ASSEMBL Y/ DISASSEMBL Y 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 dam- aged by electrical discharge. Do not touch or work near integrated circuits wi[...]

94 AssemblyDisassembly 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 Pl[...]

AssemblyDisassembly 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 T ensioner Figure 5-3. Electronics Cover Removal. 1. Perform the Left, Middle, and Right Cover Remova[...]

96 AssemblyDisassembly 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[...]

AssemblyDisassembly 97 ASSEMBL Y/ DISASSEMBL Y 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 [...]

98 AssemblyDisassembly Croma24 Service Manual Failure to use an approved anti-static bag for storage or 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 is to be stored for repair at your facility. Ins[...]

AssemblyDisassembly 99 ASSEMBL Y/ DISASSEMBL Y 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 t[...]

100 AssemblyDisassembly 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 [...]

AssemblyDisassembly 101 ASSEMBL Y/ DISASSEMBL Y Croma24 Service Manual Figure 5-7. Carrier PCB Removal/Installation. 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 t[...]

102 AssemblyDisassembly 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.[...]

AssemblyDisassembly 103 ASSEMBL Y/ DISASSEMBL Y 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. b. Turn the Carrier Assembly over and hold it while firmly grasping the Paper Sensor between thumb and index finger. See Figure 5-8. c . Pull st[...]

104 AssemblyDisassembly 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. [...]

AssemblyDisassembly 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 so that the bottom side of it is facing up. b. Pus[...]

106 AssemblyDisassembly 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 co[...]

AssemblyDisassembly 107 ASSEMBL Y/ DISASSEMBL Y Croma24 Service Manual 8. Using a #2 Phillips screwdriver, remove the three screws and washers 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 still installed), carefully slide the Trailing Cable Cover [...]

108 AssemblyDisassembly 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 [...]

AssemblyDisassembly 109 ASSEMBL Y/ DISASSEMBL Y 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, Carr[...]

110 AssemblyDisassembly Croma24 Service Manual Remove the Service Station, Seals, and W ipers 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 fa[...]

AssemblyDisassembly 111 ASSEMBL Y/ DISASSEMBL Y 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 Se[...]

112 AssemblyDisassembly 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 [...]

AssemblyDisassembly 113 ASSEMBL Y/ DISASSEMBL Y Croma24 Service Manual p r i n t e r . Figure 5-14. C-Bracket Assembly and Platen Removal.[...]

114 AssemblyDisassembly 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 Pla[...]

AssemblyDisassembly 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 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 [...]

116 AssemblyDisassembly 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 sto[...]

AssemblyDisassembly 117 ASSEMBL Y/ DISASSEMBL Y 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 [...]

118 AssemblyDisassembly 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 th[...]

AssemblyDisassembly 119 ASSEMBL Y/ DISASSEMBL Y 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 lo[...]

120 AssemblyDisassembly 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 mountin[...]

AssemblyDisassembly 121 ASSEMBL Y/ DISASSEMBL Y 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 be[...]

122 AssemblyDisassembly Croma24 Service Manual This Page Intentionally Left Blank[...]

6 P ARTS LIST 123 Parts List This chapter lists the items and their associated numbers for the parts and assemblies of the Croma24 printers that are field re- placeable. 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 n[...]

124 Parts List Croma24 Service Manual 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 .............[...]

Parts List 125 P ARTS LIST Croma24 Service Manual Figure 6-1. Croma24 Assembly Parts (Platen and Above).[...]

126 Parts List Croma24 Service Manual Figure 6-2. Croma24 Assembly Parts (Below Platen).[...]

Parts List 127 P ARTS LIST Croma24 Service Manual Figure 6-3. Carrier Assembly Breakdown.[...]

128 Parts List Croma24 Service Manual Figure 6-4. C-Bracket Assembly Breakdown.[...]

Parts List 129 P ARTS LIST Croma24 Service Manual Figure 6-5. Lower Roller Assembly Breakdown.[...]

130 Parts List Croma24 Service Manual This Page Intentionally Left Blank[...]

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 . . 95 carrier axis failure . . 81 carrier bushings . . 108 cartridges . . 47 , 55 cautions . . 19 c[...]

132 Croma24 Service Manual S scheduled maintenance . . 43 service station . . 45 ,1 1 0 servo motor . . 92 signal flow . . 77 skewing . . 57 stepper motor . . 1 12 T technical specifications . . 20 technical support ENCAD BBS . . 23 ENCAD website . . 23 help desk F AX # . . 23 telephone # . . 23 tests carriage vibration . . 70 color . . 70 fan . . [...]