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SERVICE MANUAL

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1. 5 14 Removing the Service Station Assembly 5 14 Reinstalling the Service Station Assembly 5 15 Removing the Carriage Assembly Carriage Belt and the Frame Tensioner 5 16 Removing the Carriage PWA ionan aE E nne ka Mn naa n 5 20 Reinstalling the Carriage 5 21 Remove the Paper Sensor or the Encoder Sensor 5 21 Install the Paper Sensor or the Encoder 5 23 Replacing the Carriage 0 s 5 24 Reinstalling the Carriage Assembly Carriage Belt and the Frame Tensioner 5 26 Removing the Trailirig Gable e Et eee E e nena e Ere a eer aua 5 28 Reinstalling the Trailing Cable ettet hte tee e dae dL tid 5 29 Removing the Power Supply and ON OFF Switch 5 30 Reinstalling the Power Supply and ON OFF 5 32 Remove the Stabilizer Bracket and Encoder Strip 5 33 Install the Stabilizer Bracket and Encoder 5 34 Disassembly of Plotter Before Removing the Inner Platen Parts 5 35 Removing the Inne r Platen Parts ide rtt rt e ttd d e it 5 37 R
2. 3 26 3 19 Correct Positioning of the Spring in the Pinch Roller Support 3 27 3 20 Test for Minimum Acceptance 3 28 3 21 Visual Verification of Gap between Roller and Y Arm 3 29 3 22 Paper Skew Acceptance Range for Rear Media Alignment Mark 3 30 3 23 Paper Skew Acceptance Range for Front Media Alignment Mark 3 31 3 24 Motion of Rollers and Adjustment of Mounting Screws 3 32 3 25 Paper Axis 3 34 3 20 Slow Deadbarnd tte rere 3 35 3 27 Color 3 38 3 28 MPWA Connections Diagram aari c nnb 3 45 3 29 Carriage PWA Connections 3 46 Chapter 4 Troubleshooting 4 1 5 1 5 2 5 3 5 4 5 5 Carriage Board LED D2 and 05 4 17 Chapter 5 Assembly Disassembly Removal of Right Cover Assembly sss eme 5 3 MPWA Connection and Screw Locations 5 4 Removal of Right Side Plate 5 6 Removal of Left COVOr eiie ees erts adde RR Rae KERN Read 5 10 Removal of the Servo 1 5 11 C
3. pa SERVICE MANUAL ENCAD Inc ENCAD T 200 COLOR INKJET PRINTER PLOTTER SERVICE MANUAL Part Number 219863 00 CadJet T 200 Service Manual Copyright Eastman Kodak Company 2002 KODAK ENCAD and CadJet are trademarks of Eastman Kodak Company Other trademarks and registered trademarks are the property of their respective owners Except as provided below no part of this manual may be copied or distributed transmitted transcribed stored in a retrieval system or translated in any human or comput ing language in any form or by any means electronic mechanical magnetic or otherwise or disclosed to a third party without the express written permission of ENCAD Inc 6059 Cornerstone Court West San Diego CA 92121 U S A Certain manuals developed by ENCAD are in an elec tronic format to be distributed on CDs or over the internet The registered user of an ENCAD product whose manual is distributed in this fashion may print one copy for their personal use only Printing history 1st Edition RevA October 2002 CadJet T 200 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 CADJET T 200 printer FEDERAL COMMUNICATIONS COMMISION RADIO AND TELEVISION INTERFERENCE FOR CLASS B DEVICE This equipment has been tested and found to comply with the limits fo
4. aa 2 16 Power SUDD 2 17 25 2 17 Chapter 3 Maintenance rxson aaaea 3 1 njirere i ote M M 3 1 Scheduled 3 1 Cleaning Procedures Feci 3 2 Extemal Cleaning Em 3 2 viii CadJet T 200 Service Manual Table of Contents cont Chapter 3 Maintenance cont Slide Shaft ers 3 2 Service Station Cleaning 222 1r teet cero quent aere eese phe eee 3 3 Linear Encoder Strip 3 4 Cartridge Dimples Cleaning erret eee iaceo kae 3 5 Flex Cable Contact Cleaning es 3 6 Clean and Inspect Stepper Motor 3 7 Clean and Inspect MPWA 3 7 Clean and Inspect Carriage Assembly 3 8 Reseat Connectors on MPWA and Carriage Board 3 8 Replace Carriage Bushings ene eee 3 11 Servo Motor Winding Resistance 3 12 Stepper Motor Winding Resistance 3 13 Banding Hardware vs Software sss eee 3 14 C
5. Assembly Disassembly 5 33 CadJet T 200 Service Manual Figure 5 20 Stabilizer Bracket Removal 5 Usea 7 64 Hex Nut Driver to remove the three screws from the back of the Y Arm which hold the Stabilizer Bracket on the Y Arm and remove the Stabilizer Bracket See Figure 5 20 Reinstalling the Stabilizer Bracket and Encoder Strip The new Stabilizer Bracket will already have the new Encoder Strip as well as new tapes for the Trailing Cable attached toit Refer to Fig ure 5 20 during this procedure reinstall the Stabilizer Bracket 1 Attach the Stabilizer Bracket to the Y Arm with the three screws which go through the back of the Y Arm into the Stabilizer Bracket It is easier to do this if you first attach one end then the other end and then the center Put the screws down to the bottom of the slot Assembly Disassembly 5 34 OO 51 1905 CadJet T 200 Service Manual in the Y Arm and use the 7 64 Hex Nut Driver to tighten them The exact positioning of the screws in the slot will be done later during the Carriage Height Adjustment in Chapter 3 Reinstall the Carriage Assembly The Trailing Cable Cover will be reattached later Slide the Carriage Assembly back and forth a few times to make sure it moves easily Make certain that it travels easily all the way to the left end of the Slide Shaft so that the Cutter activates Once you have checked the movement of the Carriage Assembly follow the procedur
6. COMPLETE ASSEMBLY 207611 03 Parts List 6 12 CadJet T 200 Service Manual Figure 6 6 Service Station Assembly Parts Breakdown Parts List 6 13
7. rde dan Inverkehrbringen dieses Ger tes angezeigt und die Berechtigung zur berpr fung der Serie auf die Einhaltung der Bestimmungen einger umt ENCAD Inc U S A CadJet T 200 Service Manual Material Safety Data Sheet ENCAD QIS Quality Imaging 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 858 452 4350 International users should contact their local dealer or distributor vi CadJet T 200 Service Manual WARRANTY OR DAMAGE CLAIMS United States ENCAD S Inc warrants its printers PRopucr to be free from defects in workmanship and materials for a period of one year from the date of purchase In order to submit 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 Buyer s sole and exclusive rights pursuant to this Warranty shall be for the repair or replacement of defective Product ENCAD specifically disclaims any and all other warran ties expressed or implied including but not limited to implied warranties of merchantability and fitness for a particular purpose In no event shall ENCAD be liable for any loss of profit or other commer
8. replace MPWA check cartridges check cartridges check flex driver cable connections reseat trailing cable replace trailing cable verify correct MB version ie 18 27 0 replace carriage PWA clean encoder strip top and bottom replace encoder strip Troubleshooting 4 6 CadJet 200 Service Manual Table 4 1 Troubleshooting Table cont Symptoms Does Not Print Ink Cartridge Misfiring no media loaded bad connection between computer and printer firmware is corrupted faulty quad flex cable bad MPWA nozzles clogged cartridge low on ink cartridge filter clogged ink drop out ink starvation resembling intermittent banding verify media is measured properly reseat cable connections on computer and printer refresh EEPROM firmware with new download replace quad flex cable or complete carriage assembly replace MPWA erform clean p refill or replace cartridge replace cartridge replace ink caddy Troubleshooting 4 7 CadJet T 200 Service Manual Table 4 1 Troubleshooting Table cont Symptoms Ink Cartridge Misfiring cont flex contacts dirty or damaged cartridge dimple area dirty or damaged cartridge not seated correctly bad cartridge service station dirty or not properly sealing cartridge jet area bad carriage assembly bad MPWA 1 perform Flex Cable Contact Cleaning proce
9. the other DMA channel is used to receive data through the parallel port via the gate array or the serial port when using a high speed serial mode One timer generates a servo interrupt every millisecond the other is used for timing the Stepper Motor The system is timed by a 33MHz system clock from an oscillator Y 1 The chip select generator is programmed to generate chip selects at the appropriate addresses with the appropriate data size byte word and with the appropriate number of wait states Gate Array SERVO PARALLEL CONTROLLER PORT TO MICROSWITCHES CARRIAGE 4 STATIC Figure 2 5 Gate Array Theory of Operation 2 6 CadJet T 200 Service Manual The gate array contains the hardware logic for dot firing monitoring changes in the Carriage Assembly position controlling DMA through the parallel port receiving commands from the microswitches and generating the PWM Pulse Width Modulation waveforms for the servo controller The gate array is a Xilinx device Itis a static RAM based field programmable gate array This means that the logic that it imple ments is determined by configuration information in internal RAM storage Each time power is turned on this information must be downloaded from the system ROM This type of gate array allows for the flexibility of upgrading the logic by simply downloading the new system software Memory Circuits Memory is used to retain large amou
10. 5 24 Lower Drive Shaft Assembly and Stepper Motor Assembly 5 40 5 25 Removing the Upper Pinch Roller Support 5 45 Chapter 6 Parts List 6 1 Left Side Parts Breakdown 6 3 6 2 Platen and Above Parts Breakdown 6 5 6 3 Right Side Parts Breakdown sess emen 6 7 6 4 InnerPlaten Parts Breakdown 6 9 6 5 Carriage Assembly Parts Breakdown 6 11 6 6 Service Station Assembly Parts Breakdown 6 13 xiv CadJet T 200 Service Manual List of Tables Table Chapter 1 General Description Chapter 2 Theory of Operation Chapter 3 Maintenance 3 1 Main PWA Connections Table 3 2 Carriage PWA Connections Table Chapter 4 Troubleshooting 4 1 Troubleshooting Table Chapter 5 Assembly Disassembly Chapter 6 Parts List XV General Description 1 Figure 1 1 CadJet T 200 Inkjet Printer Plotter Introduction This manual provides service information for the Inc 36 inch CadJet T 200 Color Inkjet Printer Plotters Itis written for service personnel who possess analog and digital circuitry experience Chapter 2 Theory of Operation should be read and thoroughly understood before troublesh
11. Foreign material on the carriage assembly could short out signals being developed on the carriage assembly and cause erroneous prints or even damage to the carriage assembly very common problem is where ink has been spilled onto the carriage assembly electrical circuits should be free of foreign material especially those with conductive properties Clean the carriage assembly by blowing the objects away or gently brush them aside with a soft brush if required Be careful not to let anything to fall into the printer as you clean or it could cause a new problem later Inspect the carriage assembly for any damage to the boards connec tions or any of the components on the assembly Reseat Connectors on MPWA and Carriage 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 This process helps to clean the contacts and can dissipate any static electrical charges that might have developed Maintenance 3 8 CadJet 200 Service Manual Figure 3 4 Main PWA Connection Locations Table 3 1 Main PWA Connections not used J7 Servo Motor Parallel Port J8 notused Disp
12. Motor Bracket Be careful not to damage the gears Make sure that the gears are meshing with each other Use the Pivot Screw and Pivot Nut to secure the Stepper Motor Assembly to the Stepper Motor Bracket Torque to 6 in lb Hook the Extension Spring onto the Spring Post Place the Spring Post through the Stepper Motor Assembly and the Stepper Motor Bracket and secure it with the Retainer Spring Post Torque to 6 in Ib Hook the Extension Spring onto the post on the Stepper Motor Bracket Complete the reinstallation of the Inner Platen Parts Reinstalling the Inner Platen Parts Refer as needed to Figure 5 20 Figure 5 22 and Figure 5 23 during this procedure 1 Insert the Lower Drive Shaft Assembly and Stepper Motor Assembly part way into the right end of the Platen Place the Fan Assembly under the Lower Drive Shaft beside the right Lower Drive Gear Make sure that the Fan Assembly wires face the right end of the Platen and the opening in the Fan Assembly faces the left end of the Platen Assembly Disassembly 5 41 10 CadJet T 200 Service Manual Lay the Stepper Motor Assembly on the palm of your right hand and use your fingertips to hold up the Fan Assembly as you push the Lower Drive Shaft into the Platen While inserting you must lift the Fan Assembly over the cap nuts on the inside of the bottom of the Platen and make sure you do not strike the Lower Rollers or the Gear on the Lower Drive Shaft against the screw
13. Output Power 20 W idle 50 W typical 100 W maximum Accuracy Dot Placement 0 0017 0 0008 Cut sheet feed accuracy edge shift 0 065 inches as measured over 36 inches Resolution 600x600 dpi or 300x600 dpi Interface Centronics parallel IEEE 1284 Network via 100 Base T Print Server Certifications Safety CSA CSE NRTL equivalent to UL1950 TUV GS EN 50 082 1 EN 60 950 UL1950 NOM 019 SCFT 1993 IEC 950 AS NZS 3260 EMI FCC Class B CSA C108 8 EN 55 022 Class CISPR 22 Class B AS NZS 3548 GB9254 98 General Description 1 5 Environment Operating 41 to 85 F 5 to 80 20 to 80 RH non condensing Storage 5 to 140 F 21 to 60 C 5 to 80 RH non condensing Contents of this CadJet T 200 Service Manual Weight 70 lbs 31 kg Dimensions Height 48 1210 mm Width 54 1370 mm Depth 30 710mm 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 chapters so that each chapter can stand alone This allows information to be located without having to refer back and forth between chapters 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 This manual is divided into six chapters as
14. Removal 2 Useaflat tip screwdriver to push up on the latch which holds the Carriage Bushing in place See Figure 5 16 3 Pullthe Carriage Bushing out of the Carriage Assembly 4 Repeat Steps 2 and 3 for the other Carriage Bushing Assembly Disassembly 5 25 CadJet T 200 Service Manual TABS T Figure 5 17 Carriage Bushing Installation Orient the new Bushing as shown in Figure 5 17 so that the metal tab on top of the Bushing goes into the Carriage Assembly first Push the Bushings in until they snap into place Perform the Reinstall the Carriage Assembly Carriage Belt and the Frame Tensioner procedures to reinstall the Carriage Assembly if Carriage was removed Reinstalling the Carriage Assembly Carriage Belt and the Frame Tensioner 1 To install the Belt onto the Carriage Assembly the bumps on the belt where the ends of the belt are joined together to make the belt continuous must be positioned between the left and right posts of the Belt Clamp See Figure 5 12 Slide the Carriage Belt between the right post and the middle post and guide it down into the Belt Clamp Then slide the Carriage Belt between the left post and the middle post and finish placing the Carriage Belt into the Belt Clamp Check the position of the Carriage Belt to make sure it matches Figure 5 12 Make sure the left end of the Trailing Cable extends out beyond the left end of the Trailing Cable Support Assembly Assembly Disassembl
15. Slow Deadband Alignment Depress the Menu key on the control panel to begin the main menu subroutine Using the Up Arrow Down Arrow and Select keys on the control panel select Utility Menu Db Calib Slow Db Test Selecting Slow Db Test will run the slow deadband test This will print the color calibration plot as shown in Figure 3 26 When the plot is complete observe the plot and determine if an adjustment 1s required If an adjustment is required select slow Db XX and using either Up Arrow or Down Arrow choose a value that is either one less or one greater then the current value Press Select to accept the selection and rerun the Slow Db Test Continue performing these steps until the slow deadband adjustment is correct Color Deadband Alignment The color deadband alignments are necessary to ensure that the output images are being produced with the highest quality standards available while using the ENCAD printer in a bidirectional mode These adjustments help to compensate for any deviations that may have become apparent due to the carriage speed and or the type of media loaded Precise calculations are being performed to time the release of the ink drop so that they land on the media at the correct location Differences in media thickness make the distance that the ink has to fall vary and this variable needs to be compensated for in the calcula tions Maintenance 3 36 CadJet T
16. Table of Contents cont Chapter 4 Troubleshooting eeeeeeeeeeeennnnnnnnnnennnnnn 4 1 4 1 4 1 Initialization FFallufe cecinit oo eee pe d a cet td 4 2 Media Does Not MOVO torte xr n N rotat du eR e REPRE UE 4 2 Internal ERROR Carriage Axis 4 3 Internal ERROR Encoder Sensor Failure ess 4 5 Internal ERROR Paper Sensor 2 2 7 4 5 Internal ERROR Auto Sensor 4 6 intemal ERROR MPOB Failure rd dine ted ea tkt 4 6 Unrecognized Cartridges 4 6 Image Skews Or MOVES crece tuta bee d bb d e Ce reg 4 7 Bloquer 4 7 Ink Cartridge MISIN etico ed 4 7 Paper chu tuns eux EE 4 9 Printer Output is Banding Horizontal 4 9 Printer Output is Banding 4 11 Printer Output is Banding Horizontally and Vertically 4 12 Keypad Locked Up or Not Functioning Properly 4 12 NOISY ODOFallOEi ttd v e ud 4 13 Line Quality Degrad6ed 2 entier N 4 14 Fan Does Not Power UDp eerte een a RERO E Re SERI
17. at e ted d tx d e e 2 16 Chapter 3 Maintenance 3 1 Encoder Strip Cleaning cecinere 3 5 3 2 Cartridge Dimple REGION ieee itte tta deed ei dete add 3 5 3 02 Flex Cable Contacts rer ipe 3 6 3 4 Main PWA Connection 3 9 3 5 Carriage PWA Connection 3 10 3 6 Ribbon Connector Locking Mechanism 3 11 327 PENO MOOL EUM 3 12 3 89 Stepper MOTOR 3 13 3 9 xx EY vied a e 3 14 3 10 Dial Gauge Micrometer Assembly 3 18 3 11 Measurement Positions for Slide 3 19 3 12 Slide Shaft Profile 3 19 3 13 Carriage Head Height Tolerance 2 3 20 3 14 Setting Up Tools from Height Gauge 3 21 3 15 Zeroing the Micrometer 3 21 Xii CadJet T 200 Service Manual List of Illustrations cont Figure Page Chapter 3 Maintenance cont 3 16 Test Cartridge Installed oett ere E aae oec dece 3 22 3 17 Pinch Roller Supports Numbering Sequence 3 24 3 18 Pinch Roller Support and Mounting Screws
18. complete use the Up Arrow Down Arrow and Select keys on the control panel to select Vert XX Observe the plot and using either Up Arrow or Down Arrow rotate through the selections until the one that best aligns the cyan color on the plot is selected Press Select to accept the selection and return to the Color Calib Subroutine Continue until all six calibrations on the Color Calib Menu have been accomplished Maintenance 3 39 CadJet T 200 Service Manual Diagnostics Menu To get to the Diagnostics Menu Depress the Menv key on the control panel to begin the main menu subroutine Using the Up Arrow Down Arrow and Select keys on the control panel select Utility Menu Service Menu Diag Menu All tests under the Diagnostics Menu should be performed by competent technicians only The types of tests that can be performed are Servo PWM Test Servo Cycle Test Carriage Test Color Test and Continuous Test Servo PWM Test Monitors the PWM pulse width modulation signal applied to the servo motor from the driver on the MPWA to check the amount of force required to move the Carriage The test performs three complete cycles of the carriage assembly and lists the average PWM the maximum PWM and the position of the carriage where the maximum PWM occured Servo Cycle Test Tests the servo motor by moving the carriage back and forth across the slide shaft The number of
19. flex cable contacts dirty or damaged carriage assembly obstructed carriage belt 1s loose too tight worn or damaged Troubleshooting perform Color Calibration perform Paper Axis Test Calibration replace bushings replace bushings reload firmware 1 perform Cartridge Dimple Cleaning procedure 2 replace cartridge 1 perform Flex Cable Contact Cleaning 2 replace carriage assembly check carriage assembly for proper movement along Y arm reinstall check tension assembly and or replace belt 4 10 CadJet 200 Service Manual Table 4 1 Troubleshooting Table cont Symptoms Printer Output is Banding Horizontal cont Printer Output is Banding Vertical corrupted NVRAM carriage head height incorrect incompatable or defective memory module dirty carriage bushings defective carriage bushings trailing cable connections faulty trailing cable lower roller height incorrect dirty encoder strip defective encoder strip Troubleshooting clear NVRAM check carriage head height and perform calibrations replace memory module clean bushings replace bushings reseat trailing cable replace trailing cable check lower roller clean encoder strip replace encoder strip 4 11 CadJet T 200 Service Manual Table 4 1 Troubleshooting Table cont Symptoms Printer Output is Banding Horizontally and Ver
20. gener ates a sine wave output This signalis fed into a comparator circuit thatis measuring the current through the winding of the stepper motor If the current is too low a pulse of 24V is generated When the current goes above the output of the waveform generator the pulse turns off Every time the output of the waveform generator is changed by the microprocessor the motor moves 1 micro step Each circuit contains four main functions see Figure 2 6 1 Reference waveform generator The microprocessor uses a D A digital to analog converter to set the desired level for the current in the stepper motor winding The output of the D A converter varies in time to create a reference waveform This reference waveform is centered around 10V Theory of Operation 2 9 CadJet T 200 Service Manual 2 Motorcurrent sense The voltage across a series current sense resistor is measured and level shifted so that it is centered around 5V 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 Powerdriver An H bridge allows the supply voltage to be applied across the winding in either polarity used to drive the current level to the desired value Theory
21. is applied to the MPWA where it is further regulated and separated into 24VDC 13VDC and 5VDC The 24V supply is used for the stepper controller which advances the paper the servo controller which moves the Carriage and power to fire the inkjets The 5V supply powers the logic circuits The power supply is fused using a 6 3A 250V fast blow type fuse The outputs share a common ground which is isolated from earth ground with in the supply itself Earth ground and DC ground are connected external of the power supply The power supply will shut down under overload short circuit conditions on any output over the full range of input voltage Overvoltage protec tion is 2096 3096 above nominal for the 24V output Fan Operation A fan 1s located inside the platen with its fan vent seen from under the platen on the right side of the printer This fan provides suction on the platen bed and holds the paper media flat during the printing process It also serves to cool the power supply since the power supply is located inside the platen Theory of Operation 2 17 Maintenance 9 Introduction This chapter contains general maintenance and cleaning instructions for the CadJet T 200 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 maintenance since its purpose is
22. paper sensor to communicate with the MPWA The optical sensors receive their inputs from the optical encoder strip and sends this data to the MPWA The MPWA uses this information to determine the horizontal position of the carriage assembly so that accurate printing can be established Theory of Operation 2 15 CadJet T 200 Service Manual The paper sensor circuitry senses for the presence of loaded media It does this automatically during the start up and load sequences It 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 MPWA which immediately begins an out of paper subroutine This subroutine stops the printer from printing until more media is loaded The sensor also checks for the size of the media loaded so it can deter mine the proper printing parameters Display Assembly The Display Assembly is located on the right side portion of the platen and displays information and menu options available for selection Figure 2 12 Display Assembly Theory of Operation 2 16 CadJet T 200 Service Manual Power Supply Aninternal UL recognized switching power module supplies power for the printers It provides a constant 24VDC output from input voltage in the 90 132 VAC and 180 246 VAC ranges power switch turns the power on and off The 24VDC
23. the Trailing Cable connector J6 on the Carriage PWA and remove the end of the Trailing Cable Figure 5 10 Strain Relief Removal Installation Remove the Trailing Cable and Strain Relief from the Carriage Assembly by releasing the latch on the left lower side of the Strain Relief and lifting it off of the Carriage Assembly See Figure 5 10 Compress the back of the Frame Tensioner and use the end of a screwdriver to remove the Carriage Belt from the Servo Motor pulley See Figures 5 5 and 5 6 Remove the Compression Spring from the Frame Tensioner and set it aside Assembly Disassembly 5 17 CadJet T 200 Service Manual 8 Pushthe Carriage 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 11 COMPRESSION SPRING FITS OVER THIS POST COMPRESSION SPRING FRAME TENSIONER CARRIAGE BELT THIS NOTCH IN THE n THIS NOTCH IN Leg FRAME TENSIONER THE END OF THE MUST FIT OVER C BRACKET IDLER PULLEY ASSEMBLY SIDE WITH THICKER OUTER RING OF PLASTIC MUST FACE UP Figure 5 11 Frame Tensioner 9 Slide the Carriage Assembly and Drive Belt off the left side of the Slide Shaft 10 Once the Carriage Assembly is removed from the Slide Shaft turn it over so that you can see the Belt Clamp See Figure 5 12 11 To disengage the Carriage Belt from the Belt Clamp push the Carria
24. this manual warnings cautions and notes precede the text to which each applies The defini tion of each is provided below WARNINGS Warnings are used to stress that the following steps or procedures has the potential to cause serious harm or death to service personnel Extreme care should be observed when following the proce dures and to exercise standard safety procedures They are indicated WARNING Followed by a paragraph describing the concern CAUTIONS Cautions depict that the following steps or procedures can cause damage to the equipment if not properly followed 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 NOTES Notes are placed before a procedure to inform the service personnel of specific details to improve quality to give reminders of interrelated parts and to provide other helpful information They are indicated by NOTE Followed by a paragraph describing the concern General Description 1 4 Printer Specifications CadJet T 200 Service Manual The specifications and performance characteristics of the CadJet T 200 Color Inkjet Printers are as follows Max Printing Area Norm 34 8 884 mm Extend 35 61 904 mm Language Emulation HP RTL EN RTL HP GL 2 Buffer 32 MBinstalled upgradeable to 128 MB Power Requirements Input Voltage 90 246 VAC 47 63 Hz
25. used in conjunction with the assembly disassembly procedures to aquire the necessary parts and properly install them into the printer The parts and assemblies may be ordered through your local authorized dealer or ENCAD Inc s Technical Support and Service department FIGURE ITEM 6 1 6 1 6 1 6 1 6 1 6 1 Oo A won CadJet T 200 Service Manual PART NAME PART ROLLGUIDE RIGHT ASSY 206828 5 ROLLGUIDE LEFT ASSY 204969 6 COVER ASSY LEFT 217512 00 POWER ENTRY ASSY 207508 POWER SUPPLY ASSY 150W 218759 00 CABLE POWER SUPPLY TO MPWA 218762 00 HARDWARE KIT een 205188 ASSY HEIGHT GAGE KIT 209996 1 LOOPBACK TEST CABLE 205462 Parts List 6 2 CadJet T 200 Service Manual Figure 6 1 Left Side Parts Breakdown Parts List 6 3 CadJet T 200 Service Manual FIGURE ITEM PART NAME PART 6 2 1 SPRING COMPESSION 209052 6 2 2 STOP ASSEMBLY 204246 1 6 2 8 COVERASSY TOP eene 217860 00 6 2 4 BELT 1232 neon tss 205678 6 2 5 SPRING COMPRESSION IDLER 203999 6 2 6 IDLER ASSEMBLY 8 203405 1 6 2 7 FRAME TENSIONER 203870 1 6 2 8 TRAILING CABLE ASSY 209269 01 6 2 9 PINCH RO
26. 200 Service Manual SELECT when depressed accepts the slection shown on the display UPARROW cycles through the available options DOWN ARROW cycles through the available options LOAD loads the media Interface Circuits Parallel MICRO GATE PARALLEL PROCESSOR ARRAY lt gt CONNECTOR Figure 2 10 Interface Circuits Data from the host computer is received through the Centronics parallel port The gate array provides the control signals for DMA transfers from the parallel port to DRAM The parallel port is the connection for sending print jobs to the printer This port can be connected to a wide variety of computers running various operating systems It is also used to connect the printer to a network print server device such as the SEH Print Server that comes as an option with the printer Theory of Operation 2 14 CadJet T 200 Service Manual Carriage Assembly Circuits OPTICAL ENCODER OPTICAL SENSOR TRAILING CABLE PAPER SENSOR TRAILING CARRIAGE CARTRIDGE 1 INKJET CARTRIDGE 2 DRIVERS CARTRIDGE 3 CARTRIDGE 4 CARRIAGE ASSEMBLY Figure 2 11 Carriage Assembly Circuits The Carriage Assembly contains 1 Carriage PWA 2 Optical Sensors 9 PaperSensor 4 Inkjet Cartridges The Carriage PWA contains the logic and drive circuitry for the firing of the inkjet cartridges It also establishes an interface path for the optical sensor and
27. 200 Service Manual To perform the Color Deadband Alignments Depress the Menv key on the control panel to begin the main menu subroutine Using the Up Arrow Down Arrow and Select keys on the control panel select Utility Menu Db Calib Color Db Test Select Color Db Test to run the color deadband test The test consists of 12 default calibration settings When the test is run it will print out a pattern of 5 calibration lines for each of the 12 settings It will print this pattern in black first followed by cyan magenta and then yellow Also printed will be the current settings for each of the four colors as well as the slow deadband setting When the plot is complete select K Fast DB XX Observe the plot and using either Up Arrow or Down Arrow rotate through the selections until one that seems closest to the correct value is selected Press Select to accept the selection Continue performing these steps until the all color deadband adjustments are correct Maintenance 3 37 CadJet T 200 Service Manual Color Calibration This procedure describes how to check that the cartridges are properly aligned for color plotting and should be followed each time the ink cartridges are installed Figure 3 25 is a representation of how a color calibration looks when printed SS SS SS SS SS SS SS SS SS SS SS SS SS SS M SS SS SS SS SS SS c FO T ot we te a d W dw I LLMLTTTSTSTSSTS
28. 45 1 BRACKET ASSY DRIVE SHAFT LEFT 204916 SUPPORT DRIVE SHAFT 203556 2 FAN ASSEMBLY VACUUM 210139 EXHAUST GRILL een 204976 PLUG PLATTEN 208742 Parts List 6 8 CadJet T 200 Service Manua Figure 6 4 Inner Platen Parts Breakdown Parts List 6 9 FIGURE ITEM 6 5 6 5 6 5 6 5 6 5 6 5 6 5 6 5 6 5 6 5 6 5 O oua CadJet T 200 Service Manual PART NAME PART COVER CARRIER ELECTRONICS 215111 02 CARRIAGE PWA 212151 05 ENCODER SENSOR W FLEX 209578 101 STRAIN RELIEF 2 2 2 215659 00 PEN CARRIER 208 PARTIAL 210004 CARRIAGE BUSHING SET 2 209568 PAD BUSHING 212426 00 SPRING PAD 208 JET 207572 FERRITE FLEX CABLE 210809 PWB FLEX QUAD eene 215174 00 PAPER SENSOR W FLEX 207180 PEN CARRIER ASSY COMPLETE ASSEMBLY 217619 00 Parts List 6 10 CadJet T 200 Service Manual Figure 6 5 Carriage Assembly Parts Breakdown Parts List 6 11 CadJet 200 Service Manual FIGURE ITEM PART NAME PART 6 6 1 SEAL 104 208 embeds 206502 6 6 2 WIPER ER tener tho ge 2092776 SERVICE STATION
29. Chapter 1 GENERAL DESCRIPTION Contains a general description of the ENCAD CadJet T 200 printer This includes printer specifications and related materials Also included is a description of the use of Warnings Cautions and Notes as used in this manual and chapter contents Chapter 2 THEORY OF OPERATION Functional descriptions of the overall printer and major assemblies are contained in this chapter General Description 1 6 CadJet T 200 Service Manual Chapter 3 MAINTENANCE This chapter covers the scheduled maintenance cleaning procedures and alignment adjustments recommended to perform on the printers Diagnostics and a signal flow diagram are also listed 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 1solate 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 Chapter 5 ASSEMBLY DISASSEMBLY Contains detailed procedures to remove and replace printer parts and assemblies Chapter 6 PARTS LIST Contains a complete listing of all field replacable parts and assemblies for the color inkjet printers Illustrated parts breakdown drawings are included to help clarify and identify parts for ordering Special k
30. E Ree 4 15 Media is Not Measured Properly nnns 4 15 Initialization 15 117 4 16 Chapter 5 Assembly Disassembly 5 1 EE 5 1 Removing the Right Cover Assembly 5 2 Removing the MPWA Connectors 5 4 Removing thie MPYA 5 5 Removing the Right SidePlate 5 6 Reinstalling the Right SidePlate inei hpc 5 7 Reinstalling the MPWA trt e rte re Fo ee iie eder 5 7 Reinstalling the MPWA Connectors emen 5 7 CadJet T 200 Service Manual Table of Contents cont Chapter 5 Assembly Disassembly cont Memory Module Removal teret Lee tuae 5 8 Memory Module Installation roit Ert d ea 5 9 Reinstalling the Right Cover Assembly 5 9 Removingithe Cover cu ed adea bee bn de 5 9 Reinstalling the Left Cover eren Ra geh eua Rae ebd daa a ades 5 10 Removing the Servo MOILOF e reo t gta 5 10 Reinstalling the Servo eene nnns 5 12 Removing the Display Assembly 5 13 Reinstalling the Display Assembly
31. F THE HOLDER Figure 5 14 Paper and Encoder Sensor Removal 2 To remove the Paper Sensor a Unlockthe connector at J3 and remove the flex cable b Turnthe Carriage Assembly over and hold it while firmly grasping the Paper Sensor between thumb and index finger See Figure 5 14 c Pullstraight up on the Paper Sensor and remove it from the Carriage Assembly Assembly Disassembly 5 22 CadJet T 200 Service Manual To remove the Encoder Sensor a Unlockthe connector at J2 and remove the flex cable b Turnthe Carriage Assembly over and lay it with the top side facing down c Pushdownon the plastic clip and at the same time push down on the Encoder until the plastic pieces on each side of the Encoder clear the ridges which hold it in place Then pull it straight out See Figure 5 14 Install the Paper Sensor or the Encoder Sensor 1 CARRIAGE ASSEMBLY ALIGN SIDES GROOVES OF PAPER SENSOR BOARD BETWEEN lt GROOVES AND PUSH STRAIGHT ROUTE FLEX THROUGH SLOT INSIDE THE PUSH DOWN ON CLIP PUSH ENCODER IN OVER ENCODER MUST SLIDE PAST THE RIDGES AND SNAP INTO PLACE Figure 5 15 Paper and Encoder Sensor Installation To install the Paper Sensor a Turn the Carriage Assembly so that the bottom side of it is facing up b Route the flex on the Paper Sensor through the slot in the Carriage Assembly Make sure the flex cable goes all the way through and does not curl under th
32. FT DRIVE SHAFT SUPPORT REMOVE THROUGH LEFT END OF PLATEN Figure 5 22 Removal of Lower Drive Shaft Screws 1 Lay Platen on its back 2 Useaflat screwdriver to pry out the Snap Plug on the bottom side of the Platen 3 Using a 1 6 or 8 Phillips screwdriver remove the four screws on the bottom of the Platen which hold the Exhaust in place 4 Insert your left hand into the opening for the Exhaust and hold the Fan Assembly in place while using a 2 6 or 8 Phillips screwdriver to remove the 3 flat head screws on the bottom of the Platen which hold the Fan Assembly in place Do not allow the screws to come out at an angle 5 Laythe Platen on its bottom Assembly Disassembly 5 37 CadJet T 200 Service Manual 6 Using a 16 or 8 Phillips screwdriver remove the 4 black flat head screws which hold the left and middle Drive Shaft Supports in place There are two screws in the center of the Platen and two screws approximately three inches to the left of the left brass bracket See Figure 5 22 7 Remove the left Drive Shaft Support through the left end of the Platen and the middle Drive Shaft Support through the Snap Plug opening NOTE Be very careful when removing the Foam Block so that it does not tear If it does tear however it must be replaced with a new one so that the Inner Platen has sufficient vacuum 8 Remove the Foam Block which is beside the Stepper Motor Assembly by putting your index finger into th
33. G SCREW 1 2 TURN AT A TIME 1 2 TURN AT A TIME Figure 3 24 Motion of Rollers and Adjustment of Mounting Screws Once you have completed the adjustment of Rollers 8 7 and 6 adjust Rollers 5 and 4 following the same procedures After Rollers 5 and 4 are adjusted adjust Rollers 3 2 and 1 following the same procedures Maintenance 3 32 CadJet T 200 Service Manual Paper Axis Calibration The paper axis calibration procedure ensures that the processing that drives the stepper motor is correct to minimize line length accuracy errors perform the paper axis procedure Depress the Menu key on the control panel to begin the main menu subroutine Using the Up Arrow Down Arrow and Select keys on the control panel select Utility Menu Paper Calib Calib XYz On or Ensure that Calib XY is set to ON and press Select This allows the printer to store the data that is entered in the following steps Then select Paper Axis Test This runs the paper axis test which prints out two T figures that are mirrored from each other and about 33 apart See Figure 3 27 Maintenance 3 33 CadJet T 200 Service Manual 33 Figure 3 25 Paper Axis Test With a precision drafters measuring stick measure the exact distance from each of the T intersections Select Paper Axis XX The XX will read 33 00 if the plotter is set in English units or 83 82 if in met
34. If you think that the printer is coming back to ENCAD for Failure Mode Analysis do not clear the as it will also clear out any additional information that FMA and Engineering may need to properly diagnose the cause of the failure Clearing the is required anytime that a MPWA is to be perma nently removed from a printer The NVRAM is a section of nonvolatile memory that stores printer size information The MPWA is the identi cal for both printers but it will have to learn which size printer it is installed in Clearing the NVRAM allows the MPWA to relearn which size printer it is reinstalled into Clearing the NVRAM also resets all values to their default settings including the clock After clearing the NVRAM all user settings and electrical calibrations will be lost and needs to be performed again To clear the Depress the Menv key on the control panel to begin the main menu subroutine Using the Up Arrow Down Arrow and Select keys on the control panel select Utility Menu Service Menu Press either the Up Arrow Down Arrow key until a blank is displayed on the bottom line then press the Select key twice Maintenance 3 42 CadJet T 200 Service Manual Using the Up Arrow Down Arrow and Select keys on the control panel select Codel 0 Codel 8 2 0 Code2 2 Code3 0 Code3 4 Code4 0 Code4 5 Hidden Menus Clear NVRAM After se
35. LLER ASSEMBLY 204773 6 2 10 STABILIZER ASSY WITH ENCODER STRIP eene 204550 6 2 11 SLIDESHATT 4 4 217506 01 6 2 12 KNIFE DAMPER ASSY 202000 6 2 13 PEATENASSY 214495 02 Parts List 64 CadJet T 200 Service Manual Figure 6 2 Platen and Above Parts Breakdown Parts List 6 5 FIGURE ITEM 6 3 6 3 6 3 6 3 6 3 6 3 F wo N HG CadJet T 200 Service Manual PART NAME PART PRINT SERVER OPTIONAL 218239 00 SIDE PLATE 217516 00 MAIN PCB T 200 SERVICE 2119668 025 DRAM DIMM 32M 212456 00 COVER ASSEMBLY WITH KEYPAD diii 217510 00 DISPLAY HOUSING ASSY 217543 00 Parts List 6 6 CadJet T 200 Service Manual Figure 6 3 Right Side Parts Breakdown Parts List 6 7 FIGURE ITEM 6 4 6 4 6 4 6 4 6 4 6 4 6 4 6 4 6 4 6 4 1 10 CadJet T 200 Service Manual PART NAME PART MOTOR ASSY SERVO WIEERRELDE tertie ettet nene 213674 04 BLOCK RIGHT FOAM 217568 00 MOTOR ASSY STEPPER W FERRITE AND GEAR 210848 1 BRACKET ASSY DRIVE SHAFT se coast eset 204916 1 LOWER DRIVE E ASSY COMPLETE WITH STEPPER MOTOR AND RIGHT BRACKET 2048
36. M TY m mW M 6 5 4 3 1 0 1 2 3 4 5 6 COLOR HORIZONTAL HEAD TO HEAD CALIBRATION Current Heads Y M C 2 Figure 3 27 Color Calibration 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 Maintenance 3 38 CadJet T 200 Service Manual 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 Be careful that you are aligning the correct color by observing the C cyan M magenta and Y yellow on the right side of the plot The Color Vertical Head to Head Calibration checks the alignment of the nozzles vertically and allows corrections when required Just enter the value below the set of lines that are correctly aligned Be careful that you are aligning the correct color by observing the C cyan M magenta and Y yellow on the right side of the plot To perform the Color Calibration Depress the Menu key on the control panel to begin the main menu subroutine Using the Up Arrow Down Arrow and Select keys on the control panel select Utility Menu Color Calib Print Test This will print the color calibration plot as shown in Figure 3 25 When the plot is
37. Manual Initialization Troubleshooting The sequence that the printer follows during initialization power up is as follows 1 Power supply turns on LED D2 on carriage turns on then D5 turns on 2 Readsthe Flash ROM information 3 Performs memory test with installed SIMMs 4 Writes the Flash ROM data into RAM for quicker execution of the code Starts executing instructions from RAM 5 Loads MPWA gate array with boot code data 6 Checks for a valid ROM If the ROM is not valid waits for a ROM image to be downloaded 7 Steps 2 4 performed again 8 Loads MPWA gate array with ROM code data 9 Loads gate array on the carriage board LED D2 goes out as soon as the carriage board gate array is programmed 10 Turns on power supply cooling fan 11 Moves carriage 12 Checks and measures media size if loaded 13 Turn on display To troubleshoot using the D2 and D5 LEDs With the power off move the carriage away from the service station and snap the carriage cover off just enough to view the LEDs located in Figure 4 1 Turn on the unit After a short delay the LED D2 will light This will be followed by D5 turning on D5 will illuminate dimly After about 3 4 seconds LED D2 will extinguish Ensure that the LED extinguishes after about 3 4 seconds Approximately 4 seconds later LED D5 will illuminate brightly momentarily and then return to the dimly lit status The fan will turn on and the carriage assembly will
38. OFF Disconnect the power cord and interface cable 2 Raisethe printer lid 3 Carefully move the carriage toward the center of the printer Maintenance 3 3 CadJet T 200 Service Manual 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 With a dry swab wipe all moisture from the seals and wipers Close the lid and reconnect the power cord and interface cable If the service station is filling with ink or very dirty it can be removed for cleaning To remove pull the tab on the right side of the service station and lift out Replacement of the pads in the service station are recommended at this time Wash dry thoroughly and replace by placing the left side in first then pushing down on the right side until the tab locks it in place Linear Encoder Strip Cleaning Clean the linear encoder strip weekly or as necessary to remove any buildup of debris Distilled water or isopropyl alcohol may be used You may notice that it tends to fog the encoder strip however no detrimen tal effect has been observed in the field clean the Encoder Strip 1 2 Disconnect the power cord and interface cable Slightly dampen a cotton swab with distilled water or isopropyl alcohol and wipe along the length of the encoder strip on both sides Reconnect the power cord and interface cable Maintenance 34 CadJet T 200 Ser
39. PWA Connectors 1 2 3 Reinstall the Stepper Motor connector at J10 Reinstall the Fan connector Red and Black wires at J5 Reinstall the Servo Motor connector Red and Blue wires at J7 Assembly Disassembly 5 7 CadJet T 200 Service Manual 4 Reinstall the Trailing Cable at J6 When inserting the Trailing Cable connector apply pressure on the locking clip towards the MPWA in order to lock the connector in place Test to make sure the connector is locked by pulling slightly on the cable to see if it comes out 5 Reinstall the Display Cable at J3 When inserting the Display Cable connector apply pressure on the locking clip towards the MPWA in order to lock the connector in place Test to make sure the connector is locked by pulling slightly on the cable to see if it comes out Memory Module Removal This printer ships with a 32MB memory module installed on the MPWA If the MPWA 15 to be returned to ENCAD it will be returned with a factory installed 32MB module If a module of higher capacity has been installed by the customer it is recommended that this memory module be replaced with the original module before returning the MPWA to ENCAD Integrated circuits can be weakened or inactivated by electrical discharge It 15 recommended that you be grounded to a static station by an ESD wrist strap to prevent ESD damage The memory module is secured by locking tabs located at both of the narrow edges of the module
40. TE The rollers should be adjusted moving from the right side of the Platen to the left side of the Platen Load a sheet of B Size paper and adjust Rollers 8 7 and 6 following the directions in the Adjustment of Pinch Roller Supports section Load a sheet of D Size paper and adjust Rollers 5 and 4 following the directions in the Adjustment of Pinch Roller Supports section Load a sheet of E Size paper and adjust Rollers 3 2 and 1 following the directions in the Adjustment of Pinch Roller Supports section Mounting Screw Information 1 The torque requirements for the Pinch Roller Support mounting screws is 3 In Lbs 0 5 Turning the mounting screw clockwise will tighten the screw Turning the mounting screw counterclockwise will loosen the screw Figure 3 18 shows the Pinch Roller Pinch Roller Spacer and the mounting screws You must stand behind the plotter in order to adjust the mounting screws on the Pinch Roller Supports Maintenance 3 25 CadJet T 200 Service Manual ROLLER PINCH ROLLER ASSEMBLY FEM PINCH ROLLER SPACER LEFT MOUNTING ae RIGHT MOUNTING SCREW as SCREW ORIENTATION STANDING BEHIND THE PLOTTER FACING THE BACK OF THE PLOTTER Figure 3 18 Pinch Roller Support and Mounting Screws 4 If the mounting screw on the right side is loosened turned counterclockwise the roller will move
41. To remove the memory module pry both tabs away from the module at the same time This will unlock the module and lift it out of the slot for easy removal Assembly Disassembly 5 8 CadJet T 200 Service Manual Memory Module Installation The memory module is secured by locking tabs located at both of the narrow edges of the module To install the memory module verify that the locking tabs are in the unlocked position then align the module over the slot ensuring that the module is oriented properly While applying equal pressure to both edges of the module press the module down into the slot until both tabs are locked into the module Reinstalling the Right Cover Assembly 1 4 Make sure that all wires are inside the Right Cover Assembly area as you begin to put the Right Cover Assembly back on so that none of the wires are pinched between the Right Cover Assembly and the Right Side Plate Align the back of the Right Cover Assembly over the connector clips on the parallel port Remove the rubber band holding the connector clips together Reinsert all three screws on the inside of the Right Cover Assembly See Figure 5 1 All three screws should be torqued to 15 in Ibs Do not overtighten Put the Top Cover back on Removing the Left Cover Removing the Left Cover provides access to the Power Supply and the Power Entry Module To remove the Left Cover proceed as follows 1 Remove the Top Cover Keep the right
42. UNTING SCREW PINCH ROLLER SPACER PINCH ROLLER ASSEMBLY PINCH ROLLER ASSEMBLY MUST TOUCH SPACER IN THE AREA SHOWN Figure 3 19 Correct Positioning of the Spring in the Pinch Roller Support Maintenance 3 27 CadJet T 200 Service Manual Other Functional Requirements The paper skew has a tendency to increase as the size of paper increases B Size through E Size When adjusting the skew make sure that 1 the skew for B Size paper is as close to the low end of the range as possible and 2 aminimum gap still remains between all Pinch Roller Supports and the Y Arm The test for acceptable gap is that a piece of bond paper can be inserted through the gap without interference that 1s the gap must be at least the thickness of a piece of bond paper See Figure 3 20 Avoid adjusting the Pinch Roller Supports so that they touch the Y Arm s cut outs ft THE MINIMUM ACCEPTABLE THE MINIMUM ACCEPTABLE GAP BETWEEN THESE TWO GAP BETWEEN THESE TWO POINTS EQUALS THE THICKNESS POINTS EQUALS THE THICKNESS OF A PIECE OF BOND PAPER OF A PIECE OF BOND PAPER Figure 3 20 Test for Minimum Acceptable Gap Maintenance 3 28 CadJet T 200 Service Manual Adjustment of Pinch Roller Supports NOTE Be sure to perform the adjustment according to the se quence given in Figure 3 17 Visual Verification Make sur
43. Upper Pinch Roller Supports 6 Putthe Carriage Belt back into place in the Y Bracket by installing the Frame Tensioner Assembly Assembly Disassembly 5 46 CadJet T 200 Service Manual NOTE Make sure that the Carriage Belt is not twisted One way to check this is by standing at the left end of the plotter and looking down the length of the inside of the Y Bracket You can also check for twisting by moving the Carriage Assembly as far as possible to the left end of the Slide Shaft Once you are certain there is no twisting of the Carriage Belt slide the Carriage back and forth a few times to make sure that it slides smoothly 7 Reattachthe Trailing Cable Cover to the Y Bracket 8 Reattach the Left Cover 9 Because you have replaced the Upper Pinch Roller Supports it is necessary to perform the following portions of Chapter 3 PaperSkew Setup Paper Skew Adjustment Because the Carriage Belt was loosened during this procedure you will need to verify the Deadband Adjustment by performing the following portions of Chapter 3 Deadband Calibration 10 Replace the Top Cover after you have finished Step 9 Assembly Disassembly 5 47 Parts List 6 This chapter lists the items and their associated numbers for the parts and assemblies of the CadJet T 200 printers that are field replaceable The list is in order of part name as identified in the assembly disassem bly chapter This list is to be
44. VE SHAFT SNAP PLUG POWER POWER SUPPLY SUPPLY CABLE Figure 5 19 Inner Platen Parts 1 Ifthe ON OFF Switch was removed push the new switch into place Position it so the switch is on top and the prongs for the Power Cord are on the bottom Connect the ground wire to the inside of the Platen Torque to 6 in lbs NOTE The ground wire from the power entry module must be on the bottom and make good contact with the platen surface Assembly Disassembly 5 32 6 CadJet T 200 Service Manual Connect the Power Cable coming from the MPWA to the connector on the Power Supply Make sure that the ground from the Power Cable is still connected to the inside of the Platen at the same location as the ground from the ON OFF Switch Insert the Power Supply part way into the Platen Connect the Power Switch cable to the connector on the Power Supply Position the Power Supply in place inside the Platen and insert the screws through the bottom of the Platen and into the Power Supply Use a 2 Phillips screwdriver to torque the screws to 6 in lbs Do not overtighten them Reinstall the Left Cover and the Top Cover Removing the Stabilizer Bracket and Encoder Strip 1 2 Remove the Cartridges and the Top Cover Remove the Left Cover Remove the Trailing Cable Cover Frame Tensioner and Carriage Assembly Remove the Trailing Cable from the tapes on the Stabilizer Bracket Discard the Trailing Cable it cannot be reused
45. a PowerPC 33MHz microprocessor based digital printer that receives plotting instructions from a host computer through the Centronics parallel interface This interface is either connected directly to a computer or through a network print server CadJet T 200 Printers General Block Diagram Figure 2 1 illustrates the major functional areas of the printers The CadJet T 200 printers consist of two mechanical assemblies 1 Paper Media Axis Drive 2 Carriage Axis Drive and four main electrical assemblies 1 MPWA Main Printed Wiring Assembly 2 Carriage Assembly 3 Display Assembly 4 PowerSupply CadJet T 200 Service Manual SERVO ome MOOR T 4 SENSOR ENCODER SENSOR o DISPLAY MCRO KE CM E CIRCUITS PROCESSOR DR DEMNM CARRIAGE ASSEMBLY POWER GATE SUPPLY ARRAY MEMORY CIRCUITS MPWA LOWER Fc La NE PAPER AXIS DRIVE gt DRIVE MOTOR ASSEMBLY LEGEND ELECTRICAL CONNECTION MECHANICAL CONNECTION MAIN DATA BUS 7 gt Figure 2 1 General Block Diagram Theory of Operation 2 2 CadJet T 200 Service Manual Paper Media Axis Drive PINCH ROLLERS 77 STEPPER MOTOR A LOWER ROLLER SHAFT ASSY 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
46. adJet T 200 Service Manual Observation of Paper Skew at Front Media Alignment Mark 1 Press FEED MEDIA and then the UP ARROW to move the media forward while you observe the paper skew at the Front Media Alignment Mark 2 The paper should be returning to its preloading location preferably without any skew gap Engineering specification requires the skew to be within 0 00 0 06 approximately one width of Platen s line See Figure 3 23 FRONT MEDIA ALIGNMENT MARK LOCATED ON THE FRONT SIDE OF THE PLATEN PAPER PAPER 0 00 0 06 l LEFT PAPER SLEW ACCEPTANCE RIGHT RANGE ONE LINE WIDTH Figure 3 23 Paper Skew Acceptance Range for Front Media Alignment Mark Maintenance 3 31 CadJet T 200 Service Manual Adjustment of the Mounting Screws Figure 3 24 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 1s a gap when the Lower Roller is rotated forward IF ROLLER MOVES IF ROLLER MOVES TO THE RIGHT TO THE LEFT AND TOUCHES AND TOUCHES d STANDING BEHIND THE PLOTTER FACING THE BACK OF THE PLOTTER 5 D THEN TIGHTEN THE THEN TIGHTEN THE LEFT MOUNTING SCREW RIGHT MOUNTIN
47. al DETECTOR 2 e DETECTOR 1 OUTPUT OF DETECTOR 1 PFLILI LIU LI LE L OUTPUT OF DETECTOR 2 Ed test des Mea dee EST esl TE COMPOSITE TRANSITION TRIGGERED OUTPUT OF BOTH DETECTORS LLLEELEEEEEEELLELELLLLEEELEEEEELL T T T 57 4 OUTPUT PULSES PER OPTICAL LINE Figure 2 8 Quadrature Signal Generation The direction that the Carriage 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 Carriage Assembly moves left and decrements as the Carriage Assembly moves right The hardware counter is only eight bits wide so it cannot store a value large enough to represent an absolute Carriage Assembly position Instead it is read during the servo interrupt and its value compared with that from the previous interrupt This difference is used to update the absolute position value in the software Theory of Operation 2 12 CadJet T 200 Service Manual Control Panel Figure 2 9 Control Panel The Control Panel is located on the right side of the printer and contains two indictors ERROR READY and seven buttons RESET resets all conditions to factory select settings SHORTCUTMENU allows immediate access to common functions cut prime feed media access cartridge pause and clean MENU begins the main menu routine Theory of Operation 2 13 CadJet T
48. and software banding errors HARDWARE SOFTWARE 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 pinch rollers or the rollguides on the back of the printer All these possible faulty areas deal with a rotational movement that if faulty will gener ate a consistent banding pattern The MPWA and Carriage PWA can also cause this type of error to incur Software banding is characterized by inconsistent banding lines These banding lines are generated by the software when the application incorrectly interprets the media advancing ink firing sequence of the expected print file Because it is not directly tied to a mechanical movement the bands become inconsistent in both frequency and duration The possible causes are the printer driver the original software package or the RIP if one is used To eliminate the chance that it is the printer driver 1 Remove any RIP or network systems and connect the printer directly to the computer Maintenance 3 14 CadJet T 200 Service Manual 2 Printatest file approved by ENCAD that uses only the printer driver software and the ENCAD printer If the test file prints correctly the problem lies in either the software package that generated the print or the RIP if used A simple test to determine if the band
49. ash EEPROM That s why the printer control program is also copied from the Flash EEPROM to RAM where it can be executed faster The printer also has one 168 pin 64 bit DIMM socket for a DRAM memory module The printer is supplied with a 32 Megabyte DIMM installed on the MPWA The following DIMM sizes are supported 32MB 64MB and 128MB Serial EEPROM Serial EEPROM is an Electrically Erasable Programmable Read Only Memory which provides storage for calibration constants and user configuration data entered from the host computer An 8K bit serial nonvolatile EEPROM stores calibration and configura tion information It retains data while the unit is off Theory of Operation 2 8 CadJet T 200 Service Manual Stepper Motor Controller DATA BUS gt MOTOR WAVEFORM gt COMPARATOR DRIVER CURRENT STEPPER GENERATOR SENSE Figure 2 6 Stepper Motor Controller The media is driven by a Stepper Motor which drives the media in a direction perpendicular to the width 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 The circuit is a combination of two simpler types of circuits and can be thought of as a variation of either one A waveform generator receives digital data from the CPU and
50. begin to move Troubleshooting 4 16 CadJet T 200 Service Manual Turn the unit off immediately after the LED D5 returns to the dimly lit status to ensure no damage occurs to the carriage or carriage cover due to the carriage movement as stated in step 11 Snap the cover back onto the carriage LED D5 signifies that bias voltage is available on the carriage board If LED D2 does not go out setup the printer and download new firmware as discussed in Chapter 3 Repeat these procedures If LED D2 still does not go out possible areas to suspect is the MPWA carriage board or the trailing cable Figure 4 1 Carriage Board LED D2 and D5 Locations Troubleshooting 4 17 Assembly Disassembly Introduction Chapter 5 contains the procedures for removal and replacement of the CadJet T 200 printer assemblies and mechanisms Illustrations are provided for clarity Steps for each replacable part may depend on parts already removed in previous diassembly procedures It is recommended that you read through each procedure before beginning the removal and replacement of any assemblies or mechenisms The following is a list of tools which are recommended to disassemble and reassemble the printer 1 Phillips Torque Screwdriver 2 Phillips Torque Screwdriver 1 Slotted Torque Screwdriver 2 Slotted Torque Screwdriver 1 Phillips Screwdriver 2 Phillips Screwdriver 1 Slotted Screwdriver 2 Slotted Screw
51. cial damages special incidental or consequential damages or any other damages or claims whatsoever This Warranty gives Buyer specific legal rights and Buyer may also have other rights that vary from state to state This Warranty applies only to printers purchased from ENCAD or authorized ENCAD distributors or dealers The intent of this Warranty is to repair or replace defective Prod ucts subjected to normal wear and tear when operated according to ENCAD instructions This Warranty does not cover damage to the Product resulting from the following e Accident or negligence e Unauthorized modification of the Product e Adverse environmental conditions e Service of the Product by other than an ENCAD authorized service provider e Unauthorized or improper use including but not limited to Use applications for which the Product was not designed Using cartridges or ink other than those supplied by ENCAD or authorized ENCAD resellers Using media other than that supplied by ENCAD or authorized ENCAD resellers Lubricating any part of the printer Internationally Contact your dealer or distributor for warranty information vii CadJet T 200 Service Manual Table of Contents Chapter 1 General Description 1 1 T LEE 1 1 e 1 3 Related Publications 1 3 Electrostatic Discha
52. cycles is selectable and the available options are 10 100 1 000 10 000 100 000 1 000 000 Maintenance 3 40 CadJet T 200 Service Manual Carriage Test Prints 5 sets of 3 parallel lines to test the vibration characteristics of the carriage assembly Color Test The Color Test prints a wide swath of each color total of four to test for banding The test is selectable in the amount of ink that is to be printed The available are 10 25 3596 5096 6596 75 and 10096 Continuous Test The Continuous Test sends the printer into a test loop that will perform a series of tests continuously Powering down and restarting the printer is the only way of exiting this test loop The Continuous Test will first prime the cartridges followed by a serial port test parallel port test a fast deadband display and a color calibration display The deadband and color calibration displays are used only as a visual inspection of the operating condition of the printer No adjustments can be performed while in the Continuous Test mode A loopback Test Cable is required to correctly accomplish the serial and parallel port tests Install both ends of the Loopback Cable before running this test The Loopback Test Cable is listed in Chapter 6 After completing the deadband display the test will begin again with the prime and continue until power is removed Maintenance 3 41 CadJet T 200 Service Manual Clearing the NVRAM NOTE
53. d of the Carriage PWA See Figure 5 13 5 Slide the Carriage PWA to the right to remove the tab on the left end of the Carriage PWA from the slot in the Carriage Assembly Failure to use an approved antistatic bag for storage or shipment may cause damage to the Carriage PWA and affect the Warranty 6 Placethe Carriage PWA in an ESD bag antistatic bag in preparation for shipment to ENCAD for replacement or repair or if itis to be stored at your facility for repair Install the Carriage PWA 1 Put the tab on the left end of the Carriage PWA into the slot in the left side of the Carriage Assembly See Figure 5 13 2 Ensurethat no flex cables are underneath the Carriage PWA 3 Pushdown the right end of the Carriage PWA until the latch snaps into place 4 Reattach all flex cables on the Carriage PWA 5 Perform the Install the Carriage Assembly Carriage Belt and the Frame Tensioner procedures to reinstall the Carriage Assembly Remove the Paper Sensor or the Encoder Sensor 1 Perform the Remove the Carriage Assembly Carriage Belt and the Frame Tensioner procedures to remove the Carriage Assembly from the Slide Shaft Assembly Disassembly 5 21 CadJet T 200 Service Manual TO REMOVE PAPER SENSOR BOARD GRASP HERE AND PULL UP OLEO ME PUSH DOWN ON PUSH DOWN ON ENCODER THEN PULL OUT THIS PIECE OF PLASTIC ONE ON EACH SIDE MUST CLEAR THE RIDGES ON THE UNDERSIDE O
54. der sensors that are slightly off set from each other and reading the leading and trailing edges of the lines a resolution of 600 dpi can be obtained The stepper and servo motors are controlled from the main printed wiring assembly by the microprocessor Theory of Operation 24 CadJet T 200 Service Manual Main Printed Wiring Assembly MPWA cesses CARRIAGE PWA SERVO MOTOR CONTROLLER DATA BUS SERIAL DYNAMIC n MEMORY CIRCUITS CONTROL PANEL Figure 2 4 Main Printed Wiring Assembly The Main Printed Wiring Assembly MPWA consists of seven func tional areas 1 2 Microprocessor CPU Gate Array Memory Circuits Stepper Motor Controller Servo Motor Controller Control Panel Interface Circuits Parallel Theory of Operation 2 5 CadJet T 200 Service Manual Microprocessor The microprocessor an IBM PowerPC is the central processor unit which supervises system functions executes the printer firmware manipulates data and controls input output data busses It has two built in serial ports a two channel DMA Direct Memory Access controller a timer module clock generator and an on board chip select generator One serial port connects to the Mini DIN connector which can be used to communicate with the host computer the other serial port interfaces to the Control Panel One DMA channel supplies data to the gate array for jet firing
55. driver 5 16 Hex Nut Driver 7 64 Hex Nut Driver Wrench 1 4 Screwdriver Socket Head 1 4 Wire Cutters Needle Nose Pliers X ACTO Knife ESD Wrist Strap Fixture Trailing Cable Tape Location P N 204142 optional The following materials are also required Isopropyl Alcohol Cotton Swabs Lint Free Cloth or Tissue Double Sided Tape 1 16 thick 3 4 wide Loctate Blackmax P N 200172 A Hardware Kit is available for the printers See Chapter 6 of this manual for the part number 5 1 CadJet T 200 Service Manual Always turn the printer OFF remove the power cord and the interface cable before beginning any disassem bly procedures An electrical shock hazard may be present if these precautions are not followed Removing the Right Cover Assembly Removing the Right Cover Assembly provides access to the Memory Module MPWA and all MPWA connectors Stepper Motor Servo Motor Fan Display Power Supply and Trailing Cable To remove the Right Cover Assembly 1 Removethe Top Cover Keep the right end of the Top Cover tilted up so that the Retracting Stop and Compression Spring don t fall out 2 You may find it helpful to wrap a rubberband around the connector clips on the parallel port to hold them out of the way while the Right Cover Assembly is being removed 3 Movethe Carriage Assembly to the middle of the Platen Assembly Disassembly 5 2 CadJet T 200 Service Manual 4 Using a 2 Phillips screwdr
56. dures 2 replace carriage assembly 1 perform Cartridge Dimple Cleaning procedure 2 replace cartridge reseat cartridge replace cartridge 1 perform Service Station Cleaning procedures 2 replace service station replace carriage assembly replace MPWA Troubleshooting 4 8 CadJet 200 Service Manual Table 4 1 Troubleshooting Table cont Symptoms Paper Skewing Printer Output is Banding Horizontal stepper motor gearing dirty or damaged lower roller loose low print pass mode if banding is consistent check amount ofink in cartridges cartridges need to be primed clean assemblies and perform Inspect Stepper Motor Gears procedure torque screws down securing lower roller increase print pass mode 1 inspect and or replace stepper motor perform Stepper Motor Winding Resistance Check 2 inspect and or replace stepper motor gears and or lower roller assembly 3 replace MPWA replace or refill cartridges perform Prime followed by Color Test to ensure nozzles are clear Troubleshooting 4 9 CadJet T 200 Service Manual Table 4 1 Troubleshooting Table cont Symptoms Printer Output is Banding Horizontal cont color calibration required paper axis calibration required carriage bushings worn or damaged defective carriage bushings faulty or corrupt firmware cartridge dimple area dirty or damaged
57. e Belt looped over the front of the Slide Shaft soitis not damaged ALSO MAKE SURE YOU ARE LOOSENING THE CORRECT SCREWS AND NOT THE ONES WHICH HOLD ON THE STABILIZER BRACKET Assembly Disassembly 5 45 CadJet T 200 Service Manual Installing the Upper Roller Supports Make sure that the Carriage Belt 1s kept looped over the front of the Slide Shaft while installing the new Upper Pinch Roller Supports as follows 1 Placetheroller end of an Upper Pinch Roller Support behind the Slide Shaft between the back of the Slide Shaft and the front of the Stabilizer Bracket and push it forward as far as possible through the Upper Pinch Roller Support opening in the front of the Y Bracket See Figure 5 25 2 Insert and place the Pinch Roller Spacer into position Ensure that the tab on the back of the spacer is inserted into the hole in the Y Bracket 3 Movethe Upper Pinch Roller Support into place Make sure the point on top back of the Upper Pinch Roller Support is in its hole in the Pinch Roller Spacer See Figure 5 25 4 Keep pressure on the front of the Upper Pinch Roller Support while putting in the screws Make sure the Upper Pinch Roller Support 1s centered in its opening Tighten the screws until snug no more than 3 0 In Lbs 0 5 if using a torque screwdriver MAKE SURE YOU ARE TIGHTENING THE CORRECT SCREWS AND NOT THE ONES WHICH HOLD ON THE STABILIZER BRACKET 5 RepeatSteps 1 through 4 for the rest of the
58. e Carriage PWA Assembly Disassembly 5 23 CadJet T 200 Service Manual c Graspthe Paper Sensor between thumb and index finger and guide the sides of the board into the grooves on each side of the opening See Figure 5 15 d Pushthe Paper Sensor board down into the Carriage Assembly untilit snaps firmly into place e Turnthe Carriage Assembly over and insert the Paper Sensor flex cable into the connector at J7 f Pushboth sides of the connector lock shut at the same time To install the Encoder Sensor a Turn the Carriage Assembly so that the bottom side of it is facing up b Pushdown on the plastic clip and slide the back of the Encoder Sensor over it c Pushthe Encoder Sensor in past the ridges until the Encoder Sensor snaps into place d Turnthe Carriage Assembly over and insert the Encoder flex cable into the connector at J5 e Push both sides of the connector lock shut at the same time Perform the Carriage Assembly Carriage Belt and the Frame Tensioner Reinstallation procedures to reinstall the Carriage Assembly Replacing the Carriage Bushings 1 If there is not enough space on both sides of the Slide Shaft to remove the Carriage bushings perform the Carriage Assembly Carriage Belt and the Frame Tensioner Removal procedures to remove the Carriage Assembly from the Slide Shaft Assembly Disassembly 5 24 CadJet T 200 Service Manual CARRIAGE BUSHING LATCH Figure 5 16 Carriage Bushing
59. e back edge of the Platen so that it is out of the way of the Fan Assembly Assembly Disassembly 5 42 CadJet T 200 Service Manual 11 Hold the Fan in place with your left hand and insert the screws Make sure that the screws go in straight Using a 2 6 or 8 Phillips screwdriver torque them to 15 in Ibs Do not overtighten or the threads on the screw holes will strip 12 Reinstall the Exhaust on the outside of the bottom of the Platen Using a 2 6 or 8 Phillips screwdriver torque to 8 in lbs 13 Reinsert the Snap Plug in the bottom of the Platen and turn the Platen onto its bottom side Reassembly of Plotter After Reinstalling the Inner Platen Parts 1 Reinstall the Servo Motor 2 Reinstall the Display Assembly 3 Reinstall the Service Station Assembly 4 Make sure the Ground from the Power Cable is still connected to the inside of the Platen at the same location as the ON OFF Switch Ground Reinstall the Power Supply 5 Reinstall the Left and Right Rollguides 6 Route all the wires from the Servo Motor Assembly Stepper Motor Assembly Fan Assembly and Power Supply through the bottom opening on the Right Side Plate See Figure 5 23 Secure the Right Side Plate to the Platen with four screws See Figure 5 3 8 Route the Trailing Cable with the silver fingers facing up through the top slot in the Right Side Plate 9 Securethe MPWA to the Right Side Plate using three screws Make sure the Trailing Cabl
60. e is not pinched between the stand off and the MPWA 10 Bring the Trailing Cable around the bottom of the MPWA and connect it at the J6 connector Make sure the silver fingers face down when the Trailing Cable is inserted into the connector Assembly Disassembly 5 43 11 12 13 14 15 16 CadJet T 200 Service Manual Route the Display Cable through the top left edge in the Right Side Plate Bring the Display Cable down around the flat edge of the MPWA Connect the Display Cable at the J3 connector on the MPWA The silver fingers must face the back side of the plotter when the Display Cable is inserted into the connector Reconnect the Servo Motor wire Red and Blue to the J7 connector the Stepper Motor wire to the J10 connector and the Fan wire Red and Black to the J5 connector Reference Figure 5 2 Reinstall the Trailing Cable Cover Reinstall the Right Cover Assembly Make sure that none of the harnesses or cables are pinched between the cover assembly and the Right Side Plate Reinstall the Left Cover Reinstall the Top Cover The entire plotter is now reassembled Removing the Upper Pinch Roller Supports 1 2 Remove the Top Cover and Left Cover Use the 1 Phillips Screwdriver to remove the 3 screws which secure the Trailing Cable Cover to the back of the Y Bracket and remove the Trailing Cable Cover Depress the back of the Frame Tensioner see Figure 5 6 and slip the Carriage Belt of
61. e opening in the top of the Foam Block and pulling it towards you See Figure 5 23 FRONT OF 7 PLATEN JE BLOCK ALL CABLES PASS THROUGH THE FOAM BLOCK THROUGH THIS CORNER Figure 5 23 Removing the Foam Block Assembly Disassembly 5 38 CadJet T 200 Service Manual 9 Using a 1 6 or 8 Phillips screwdriver loosen but do not remove the 2 black flat head screws which hold the Stepper Motor Assembly Hold the Stepper Motor Assembly with your right hand soit does not drop suddenly and use your left hand to finish unscrewing the two screws and remove them 10 Reach into the Fan opening on the bottom of the Platen and use your fingertips to hold up the Fan Assembly so that it clears the openings screws and cap nuts on the inside of the Platen while simultaneously pulling the Stepper Motor Assembly and Lower Drive Shaft Assembly out of the right end of the Platen Removing the Stepper Motor NOTE If removing only the Stepper Motor do not remove the Bowed Washer Washer and Retaining Ring which are between the end of the Lower Drive Assembly and the Stepper Motor Bracket NOTE Do not remove the 20 Teeth Gear from the Stepper Motor NOTE Do not remove the Oilite Bushing from the Stepper Motor Bracket If it should happen to fall out press it back in as far asit will go NOTE Do not clean the Oilite Bushing with alcohol Wipe it
62. e that the roller is centered in the Y Arm The gap between the roller and the Y Arm should be approximately equal on both sides of the roller See Figure 3 21 GAP Figure 3 21 Visual Verification of Gap between Roller and Y Arm Maintenance 3 29 CadJet T 200 Service Manual Observation of Paper Skew at Rear Media Alignment Mark 1 Position a sheet of the appropriate size paper for loading The cut corner should be the top right corner of the paper as you load it Make sure the correct side is up against the rollers and the right hand side 1s aligned with the Front Media Alignment Mark on the front of the Platen NOTE Make sure that there is no gap between the right edge of the paper and the left edge of the Front Media Alignment Mark on the Platen Hold the media and press LOAD The paper will be pulled in past the Platen s groove The paper will roll forward out and stop Check to make sure that the gap between the right edge of the paper and the left edge of the Rear Media Alignment Mark on back of the Platen is within 2 line widths 0 12 See Figure 3 22 PLOTTER S REAR MEDIA ALIGNMENT MARK LOCATED ON THE BACK SIDE OF THE PLATEN PAPER LEFT k 0 00 0 12 3 RIGHT PAPER SLEW ACCEPTANCE RANGE TWICE THE WIDTH OF THE MEDIA ALIGNMENT MARK Figure 3 22 Paper Skew Acceptance Range for Rear Media Alignment Mark Maintenance 3 30 C
63. emoving the Stepper Motor 8 5 39 Reinstalling the Stepper aa 5 41 Reinstalling the Inner Platen 541 Reassembly of Plotter After Reinstalling the Inner Platen 5 43 Removing the Upper Pinch Roller 5 44 Reinstalling the Upper Pinch Roller 5 46 6 Parts CSU C 6 1 Xi CadJet T 200 Service Manual List of Illustrations Figure Page Chapter 1 General Description 1 1 CadJet T 200 Inkjet Printer Plotter secessit 1 1 Chapter 2 Theory of Operation 2 1 General Block DIagratm otro durae cepe 2 2 2 2 Paper Media AXIS DIVO uscite tete acd a E 2 3 2 3 Carriage AxIS DIlVe icc pt tx Pace RUD 2 4 2 4 Main Printed Wiring 2 5 2 5 Gate ieiunia rude 2 6 2 6 Stepper Motor Coritroller etit hne nh aen p d a Raga 2 9 2 7 Servo Motor Controle 2 11 2 8 Quadrature Signal Generation 2 12 2 9 Control Panel 2 13 2 10 Interface CIFOUIES accord rtl 2 14 2 11 Carriage Assembly Circuits 2 15 2 12 Display Assembly 2 2222 ttt tetti cie
64. end of the Top Cover tilted up so that the Retracting Stop and Compression Spring don t fall out While holding the Left Cover remove the three screws securing the Left Cover The three screws are removed from the the left side of the cover as shown on Figure 5 4 Assembly Disassembly 5 9 CadJet T 200 Service Manual Figure 5 4 Removal of the Left Cover Reinstalling the Left Cover reinstall the Left Cover proceed as follows 1 While holding the Left Cover reinstall the three screws that secure the Left Cover The four screws are reinserted as shown on Figure 5 4 All screws should be torqued to 15 in lbs Do not overtighten 2 Putthe Top Cover back on Removing the Servo Motor remove the Servo Motor proceed as follows 1 Disconnect the power cord and the interface cables 2 Remove the Top Cover 3 Remove the Trailing Cable Cover from the Y Arm Assembly in order to have easier access to the Frame Tensioner and to the screws that hold the Servo Motor in place Assembly Disassembly 5 10 CadJet T 200 Service Manual 4 Removethe Right Cover MPWA and Right Side Plate for removal of the Servo Motor SERVO MOTOR REAR PULLEY cyr our SCREW CARRIAGE BELT Figure 5 5 Removal of Servo Motor 5 Usea 2 Phillips screwdriver to remove the back screw on the Servo Motor See Figure 5 5 While using extreme care not to damage the Trailing Cable align the screwdriver through the cut
65. es for attaching the Trailing Cable to the tapes on the Stabilizer Bracket Reattach the Trailing Cable Cover Reattach the Left Cover Reinstall the Cartridges and the Top Cover Perform the Carriage Height Adjustment procedure located in Chapter 3 Disassembly of Plotter Before Removing the Inner Platen Parts Refer to previous sections of this chapter and Figure 5 21 as necessary during this procedure To obtain access to the Inner Platen Parts 1 2 pa a Remove the Top Cover and Left Cover Remove the Right Cover Assembly Disconnect all the connectors from the MPWA Remove the MPWA Remove the Right Side Plate Remove the Display Assembly Assembly Disassembly 5 35 CadJet T 200 Service Manual CAUTION RIGET CAUTION ROLLGUIDE DO NOT REMOVE SCREWS TO Y ARM ASSY H LEFT ROLLGUIDE SCREWS RIGHT SIDE PLATE Figure 5 21 Disassembly of Plotter Prior to Removing the Inner Platen Parts 7 Remove the Left and Right Rollguides from the back of the Platen 8 Removethe Trailing Cable Cover 9 Remove the Power Supply 10 Remove the Servo Motor 11 Clean and remove the entire Service Station Assembly Disassembly 5 36 CadJet T 200 Service Manual Removing the Inner Platen Parts Refer to Figure 5 20 and Figure 5 22 during this procedure REMOVE 2 x REMOVE SEX DRIVE SHAFT SUPPORT WITH STEPPER MOTOR REMOVE THROUGH RIGHT END OF PLATEN REMOVE mt LE
66. ethe lid and the right cover of the printer See Chapter 5 for procedures 2 Obtainthe 3 tools Micrometer Dial Gauge Test Cartridge and Measuring Tip Extender from the Height Gauge Kit Assemble the tools as shown in Figure 3 14 Maintenance 3 20 CadJet T 200 Service Manual SPIN HEAD ON MICROMETER GAUGE MICROMETER TO FACE BACKWARDS Pp di DIAL GAUGE TIGHTEN SET SCREWS TEST CARTRIDGE we MEASURING TIP EXTENDER ENSURE TIP EXTENDS BELOW CARTRIDGE 1 4 6mm Figure 3 14 Setting Up Tools from Height Gauge Kit 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 15 ZERO e ENSURE PRESSURE IS GAUGE PLACED ON THE REAR OF THE CARTRIDGE Figure 3 15 Zeroing the Micrometer Gauge Maintenance 3 21 CadJet T 200 Service Manual 4 Removethe Cyanink cartridge Snap the test cartridge with the micrometer gauge into the position vacated by the Cyan ink cartridge See Figure 3 16 Ensure that the micrometer can be read from the BACK of the printer L Figure 3 16 Test Cartridge Installed 5 Slightly loosen the screws located on the back of the Y arm that secures the stabilizer to the Y arm Damage may occur to the micrometer gauge if the Carriage is moved without liftin
67. ew on the stabilizer that is next to the Carriage Continue performing steps 10 through 12 until all four of the stabilizer screws have been adjusted Reposition the Carriage to all of the adjustment positions and verify that the measurements are correct Perform steps 6 through 14 as many times as necessary to correctly accomplish this adjustment Install the ink delivery system support bracket following the procedures located in Chapter 5 Maintenance 3 23 CadJet T 200 Service Manual Paper Skew Adjustment The purpose of the Paper Skew Adjustment is to make certain that the Pinch Roller in the Upper Roller Support stays centered on its shaft and or has a gap when the Lower Roller is rotated forward for approxi mately two full revolutions In other words the Pinch Roller should not drift rapidly to the left or to the right when the Lower Roller is rotated forward for two full revolutions Slow drifting is acceptable Use the torque screwdriver with the PO bit to adjust the Pinch Roller mounting screws NOTE Read and follow ALL of the information in the following pages before you begin the actual ajustments Paper Skew Adjustment Sequence It is very important that the sequence for the adjustment given in this section be observed Refer to Figure 3 17 for the numbering sequence of the Pinch Roller Supports Figure 3 17 Pinch Roller Supports Numbering Sequence Maintenance 3 24 CadJet T 200 Service Manual NO
68. f the Servo Motor Pulley The Carriage Belt only needs to be loose during this procedure it does not need to be removed Lift both sides of the Carriage Belt out of the Y Bracket and loop them over the front of the Slide Shaft Use the 1 Phillips Screwdriver to remove the screws which hold the far left Upper Pinch Roller Support on the Y Bracket The screws are located on the back of the Y Bracket See Figure 5 25 MAKE SURE YOU ARE LOOSENING THE CORRECT SCREWS AND NOT THE ONES WHICH HOLD ON THE STABILIZER BRACKET Assembly Disassembly 5 44 CadJet T 200 Service Manual Using your fingers pull the Upper Pinch Roller Support forward Thie will seperate it from the Pinch Roller Spacer Move the Pinch Roller Spacer to the side Push the Upper Pinch Roller Support towards the back of the unit and turn it 90 degrees and carefully lift it away from the Y Arm assembly Guide the lower tab of the Upper Pinch Roller Support up past the front of the Stabilizer Bracket Make sure the Upper Pinch Roller Support does not catch on the front edge of the Trailing Cable and that it does not damage the Slide Shaft or the encoder strip PINCH ROLLER SPACER Figure 5 25 Removing the Upper Pinch Roller Support 7 Working from the far left Upper Pinch Roller Support to the far right Upper Pinch Roller Support follow Steps 4 through 7 for each of the remaining Upper Pinch Roller Supports As you do so be sure to keep the Carriag
69. f the shaft to remove any bowing of the shaft s profile The following procedure is to ensure that the Slide Shaft is relatively perpen dicular to the surface of the Platen and to remove any bowing that may be present in the shaft s profile The Slide Shaft is set to 1 418 86cm from the top of the Slide Shaft to the Platen surface for these printers The normal operating range for the height of the Slide Shaft is between 1 390 85 3cm to 1 440 36 6cm Maintenance 3 17 CadJet T 200 Service Manual You will need the following Height Gauge Kit Assembly 1 4 open and box end wrench 110 thick Height Gauge Alignment Kit Contents are Dial Gauge Micrometer Modified Novajet Cartridge for newer products Modified Novajet 4 Pro Pro 50 Cartridge Not Used Platen Carriage Shaft Mounting Block Calibration Jo Block 1 434 Not used Plastic Gauge Card 0 011 Not used There are two basic measurements that are to be made using this kit ensure power is off prior to performing these procedures 1 Slide Shaft Profile Adjustment 2 Carriage Cartridge Head Height Setting 1 Connect the dial gauge micrometer to the Shaft mounting block as shown in Figure 3 10 GAUGE SHAFT MOUNTING TIGHTEN SET BLOCK SCREW NOT SHOWN Figure 3 10 Dial Gauge Micrometer Assembly 2 Place gauge against left side of shaft assembly allowing micrometer tip to rest directly on top of shaft See Figure 3 11 Zero the gauge
70. g up on the measuring tip This ac tion could also take the micrometer out of alignment and foul the results of the alignment 6 Whilelifting up the measuring tip of the micrometer slide the Carriage to the left side of the stabilizer 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 7 Move the left end of the stabilizer bracket until the reading below is observed Read only the RED numbers on the micrometer gauge For these printers adjust for a reading of 67 3 This equates to a head height of 0 075 Maintenance 3 22 10 11 12 13 14 15 16 CadJet T 200 Service Manual NOTE The actual measurement is different than the true head height due to the fact that the test cartridge does not con tain a jet plate assembly A difference had to be calcu lated to compensate for the lack of a jet plate assembly on the test cartridge Tighten the screw on the left side of the stabilizer While lifting up the measuring tip of the micrometer slide the Carriage to the right until the next stabilizer screw is lined up 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 Move the left end of the stabilizer bracket until a correct reading is observed Read only the RED numbers on the micrometer gauge Tighten the scr
71. ge bushings remove power and reseat trailing cable connections at the MPWA and the carriage assembly replace cutter assembly 1 check idler tension assembly 2 check carriage belt replace trailing cable Troubleshooting 4 4 CadJet 200 Service Manual Table 4 1 Troubleshooting Table cont Symptoms Internal ERROR Encoder Sensor Failure Internal ERROR Paper Sensor Failure encoder sensor cable unseated bad encoder sensor servo motor and vacuum fan connections to MPWA are switched paper sensor cable unseated bad paper sensor servo motor disconnected trailing cable connection is faulty bad trailing cable reseat encoder sensor cable replace encoder sensor reattach connections correctly use Figure 3 4 for reference reseat paper sensor cable replace paper sensor check servo motor connections reseat trailing cable replace trailing cable Troubleshooting 4 5 CadJet T 200 Service Manual Table 4 1 Troubleshooting Table cont Symptoms Internal ERROR MPCB Failure Unrecognized Cartridges Error Image Skews or Moves bad MPWA faulty connection of cartridge ID chip to flex cable wrong cartridges installed carriage flex cable disconnected trailing cable connections faulty trailing cable MB version incorrect faulty carriage PWA dirty encoder strip defective encoder strip
72. ge Belt away from the left post of the Belt Clamp and gently lift up until the bottom edge of the Carriage Belt clears the top of the left post Assembly Disassembly 5 18 CadJet T 200 Service Manual CARRIAGE BELT RIGHT POST OF BELT CLAMP LEFT POST OF BELT CLAMP Figure 5 12 Carriage Belt Clamp 12 Push the Carriage Belt away from the right post of the Belt Clamp and gently lift up to finish removing the Carriage Belt from the Belt Clamp Failure to use an approved antistatic bag for storage or shipment may cause damage to the MPWA and affect the Warranty 13 Place the Carriage Assembly in an ESD antistatic bag in preparation for shipment to ENCAD for replacement or repair or ifitis to be stored for repair at your facility Assembly Disassembly 5 19 CadJet T 200 Service Manual Remove the Carriage PWA 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 the Carriage Assembly Carriage Belt and the Frame Tensioner Removal procedures to remove the Carriage Assembly from the Slide Shaft 2 Putonan ESD wrist strap 3 Unlock the connectors and remove all flex cables on the Carriage PWA LATCH Figure 5 13 Carriage PWA Removal Installation Assembly Disassembly 5 20 CadJet T 200 Service Manual 4 Unlock the latch on the right end of the Carriage Assembly and lift up the right en
73. hooting skills will be required to perform the symptom identification troubleshooting fault isolation and repair of the printer when using this table Ensure that all applicable software diagnostic tests have been properly executed all visual indications including LED status have been observed and all applicable pushbuttons have been depressed to obtain a complete list of symptoms to be applied to the table below Use the table in conjunction with Chapter 3 Maintenance whenever the table prompts you for additional information This information may be in the form of an illustration additional data or a procedure that needs to be performed Table 4 1 Troubleshooting Table Symptoms No Power printer not ON depress power switch faulty power replace power cord cord AC input not replace AC entry present at power module supply 4 1 CadJet T 200 Service Manual Table 4 1 Troubleshooting Table cont Symptoms No Power cont Initialization Failure Media Does Not Move DC output voltage not present see Figure 3 28 for pin out DC voltage present at MPWA DIMM unseated defective or missing power supply defective trailing cable defective perform Stepper Motor Winding Resistance check rough motion while spinning stepper motor replace power supply replace MPWA reseat or replace DIMM replace power supply replace trailing cable replace stepper mo
74. ignals 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 con tact area Avoid touching the contact area because the oils on your skin can contaminate the area and result in misfiring of the inkjets Clean the flex cable contacts by gently dabbing the area with a cotton swab soaked with isopropyl alcohol Clean and Inspect Stepper Motor Gears The stepper motor gears can become dirty and after time if not cleaned up it could cause wide banding in the print This will reduce the quality of the intended output Clean the motor gears with a stiff brush to knock off any debris cotton swab soaked isopropyl alcohol can be used to remove any ink that may have accumulated on the gears Clean and Inspect MPWA Foreign material on the MPWA could short out electrical signals being developed on the MPWA and cause erroneous prints or even damage to the MPWA electrical circuits should be free of foreign material especially those materials with conductive properties Clean the MPWA by blowing the objects away or gently brush them aside with a soft brush 1f required Inspect the MPWA for any damage to the board connections or any of the components on the board Replace board if inspection reveals any damage or flaws that could effect the function of the MPWA Maintenance 3 7 CadJet T 200 Service Manual Clean and Inspect Carriage Assembly
75. ing is caused by the computer RIP application or the printer is to rotate the image 90 degrees and see ifthe banding rotates or remains in the same orientation as the previ ous print If the banding does not rotate then look for causes in the printer If the banding does rotate with the image then look for causes in the computer RIP or application Common Banding Causes 1 The RIP Raster Image Processor and print cycles We recommend printing to a file first and then queuing the file to the printer to avoid the RIP and print cycle delays that can cause banding while printing 2 Uneven inkjet kogation partial clogging or orifice restriction on the inkjet cartridge head nozzles Run the 10096 color test and re prime or replace the cartridge if necessary 3 Lower quality print modes normally cause slight banding to reduce this banding switch to 4 pass printing mode 4 Air bubbles in the ink delivery system if installed This indicates a loss of negative pressure within the ink cartridge or ink delivery system check all quick release fittings and connections for possible leaks and ensure that the cartridge 15 primed properly 5 Improper priming The lower secondary chamber within the cartridge may de prime and then temporarily recover after entering the service station causing a momentary color drop out in the print if the cartridge is improperly primed Maintenance 3 15 CadJet T 200 Service Manual 6 Wiping during a p
76. its and adjustment jigs may also be required ORIENTATION Instructions in this manual are based on the assumption that the service person is facing the front of the printer References to top view back view and so forth are consistent with this engineering standard References to the X Axis and Y Axis Paper Axis and Carrier Axis respectively follow the standard of AutoCAD absolute coordinates up and down for X left to right for Y General Description 1 7 CadJet T 200 Service Manual Technical Support ENCAD offers full technical support and service for its various prod ucts If you are unable to find the answer to your question in either the User s Guide Service Manual or other related publications check out ENCAD s Knowledge Base located on ENCA D s website support ENCAD Website http www encad com Additional information is available though our Technical Support and Service Department s Help Desk ENCAD nc Technical Support amp Service Dept 6059 Cornerstone Court West San Diego CA 92121 Help Desk Telephone 858 452 4350 or 877 ENCAD TS 362 2387 Help Desk FAX 858 558 4672 International users contact your local ENCAD service provider See details on your EN CAD registration card General Description 1 8 Theory of Operation 2 Introduction This chapter explains the mechanical and electrical theory of operation ofthe ENCAD CadJet T 200 color inkjet printers The CadJet T 200 is
77. iver loosen the top and front captive fastener screws and remove the bottom back screw on the inside of the Right Cover The front captive fastener screw can be accessed by inserting the screwdriver into the groove on the Display Assembly as shown on the lower right side of Figure 5 1 LOOSEN CAPTIVE FASTENER SCREWS REMOVE SCREWS Figure 5 1 Removal of Right Cover Assembly 5 Remove the Right Cover Move the Right Cover towards the back of the unit as you remove it so that it clears the parallel port on the back of the unit Be very careful when removing the Right Cover so that the LED s on the MPWA are not damaged Assembly Disassembly 5 3 CadJet T 200 Service Manual Removing the MPWA Connectors Do not pull the cables from the connectors on the J3 location Display Cable and J6 location Trailing Cable ubtil they are unlocked Doing so may cause damage to the cable Do not pull thelock too hard as you unlock the connectors or the lock may break off Disconnect all 6 connectors on the MPWA so that the MPWA can be removed see Figure 5 2 for positions of the connectors as follows J6 TRAILING CAPTIVE CABLE FASTENER CAPTIVE SCREW FASTENER J9 POWER SUPPLY DISPLAY ASSEMBLY 05 S CREW SERVO VACUUM MOTOR COOLING FAN Figure 5 2 MPWA Connection and Screw Locations Assembly Disassembly 5 4 CadJet T 200 Service Manual 1 Disconnect the Display Cable connector a
78. lay Circuits J9 Power Supply DIMM socket 10 Stepper Motor Vacuum Cooling Fan 11 not used Trailing Cable Maintenance 3 9 CadJet T 200 Service Manual J1 J2 SW y MSS E lt WW J4 E is SW WWW Figure 3 5 Carriage PWA Connection Locations Table 3 2 Carriage PWA Connections J1 X Yellow Drivers J5 Encoder Sensor J2 Magenta Drivers J6 Trailing Cable J3 Cyan Drivers J7 Paper Sensor J4 Black Drivers Figures 3 4 amp 3 5 and Tables 3 1 amp 3 2 show the locations of all the connectors on the MPWA and carriage 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 Maintenance 3 10 CadJet T 200 Service Manual RIBBON LOCKING MECHANISM UNLOCKED LOCKED e CONNECTOR ASSEMBLY Figure 3 6 Ribbon Connector Locking Mechanism Replace Carriage Bushings The carriage bushings are rated for approximately 1500 hours of operational usage Many factors including but not limited to hours day used cleanliness of the slide shaft and general ambient environ ment make it impossible to calculate the average time that the carriage bushings to last If not replaced the wear on the bushings can result in erratic car riage motion and or carriage axis failures I
79. lecting Clear cycle the power on the printer Firmware Download Upgrading The normal method of downloading new firmware is to send the file as if it was a standard print job To perform the firmware download follow the steps listed below 1 Power OFF printer wait 15 seconds 2 Connect parallel printer cable between the printer and PC 3 Turn the printer ON 4 Obtain the latest firmware for your printer Save both of the files to the same directory on the hard drive Double click on XXXX EXE file to inflate the compressed files The file name might be different then listed above 5 Goto a DOS environment and from within that same directory type GO XXXX ROM and press Enter The firmware is sent to the printer as an ordinary print job Maintenance 3 43 CadJet T 200 Service Manual NOTE For NT3 5x or NT4 0 systems click on Start Pro grams Command Prompt At the dos prompt go to the location of the ROM i e if the ROM file is on a floppy disk type A and press Enter Then type PRINT D LPT1 A XXXX ROM and press Enter 6 Wait approximately 40 seconds 7 Remove power from printer for 15 20 seconds Apply power to the printer The printer should initialize properly Verify firmware revision by sequencing through Utility Menu Service Menu About menu Verify firmware has been incorporated 8 Ifthe firmware download is not successful you may hear more than 1 beep or c
80. n needed in bidirectional printing mode debris or ubrication on slide shaft leaks or bubbles in ink delivery lines dirty encoder strip defective encoder strip carriage bushings worn clean and prime ink cartridges clean or replace cartridge perform Color Calibration perform Deadband Calibration clean slide shaft 1 reseal prime ink delivery lines on both sides 2 replace ink delivery lines clean encoder strip replace encoder strip replace carriage bushings Troubleshooting 4 14 CadJet T 200 Service Manual Table 4 1 Troubleshooting Table cont Symptoms Line Quality Degraded cont Fan Does Not Power Up Media is Not Measured Prop erly normal carriage function is observed but media reverses out the rear of printer or continually advances forward drive belt worn drive belt slipping on idler vacuum fan not operating MPWA has 24 VDC at J3 pins 1 2 power not being applied to fan dirty platen surface defective platen surface dirty paper sensor defective paper sensor Troubleshooting replace drive belt replace frame tensioner spring or idler replace fan assembly 1 reseat connection at MPWA to fan 2 replace fan 1 reload firmware 2 replace MPWA clean platen surface recoat platen surface with applicable paint clean paper sensor replace paper sensor 4 15 CadJet T 200 Service
81. nts of information This infor mation is stored in the device memory in the form of binary bits Printer memory consists of Flash DRAM and EEPROM Maximum installable memory is as follows DRAM 32 MB Flash 1 MB Serial EEPROM 1KB Flash EEPROM Flash EEPROM is Electrically Erasable Programmable Read Only Memory used to store instructions and data constants which the microprocessor can access and interpret with no loss of information when power is off Theory of Operation 2 7 CadJet T 200 Service Manual The system firmware is stored in Flash EEPROM The Flash EEPROM allows the firmware to be upgraded by downloading the files containing the new firmware It can be erased and reprogrammed more than 10 000 times The term Flash means that bytes cannot be individually erased A block or the whole device is erased at the same time and the block or whole device is then reprogrammed The normal method of downloading new firmware is to send the unit the files containing the code using either the GO EXE utility or printing the file to the unit This requires using an appropriate host utility and can be done through the serial port for Macintosh users or the parallel port for PC users See Firmware Downloading in Chapter 3 for the proce dures DRAM DRAM is Dynamic Random Access Memory which provides temporary storage of the microprocessor calculation and input output data It is also a faster type of memory then the Fl
82. of Operation 2 10 CadJet T 200 Service Manual Servo Motor Controller i SERVO CONNECTOR ENCODER MOTOR cate L7 gt X ARRAY 652 CARRIAGE CARRIAGE CONNECTOR MAIN PWA i Figure 2 7 Servo Motor Controller The Carriage Assembly is driven by the Servo Motor The speed of the Carriage Assembly is controlled by varying the duty cycle of the signal applied to the controller The microprocessor checks the position of the Carriage Assembly approximately 1 000 times per second during the servo interrupt It then updates the PWM pulse width modulator register in the gate array which sets the duty cycle to make adjust ments to the Carriage Assembly speed A linear optical encoder is used to monitor the Carriage Assembly position 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 The detector circuit actually consists of two optical edge detectors They are separated from each other by one half the width of one of the optical lines on the encoder strip This allows 4 evenly spaced pulses to be developed for each line on the encoder strip This is known as quadrature signals It gives an effective resolution of 600 lines per inch See Figure 2 8 for a graphical representation of quadrature signals For 300 dpi resolution one of the detectors is not used Theory of Operation 2 11 CadJet T 200 Service Manu
83. ommon Banding Causes aee era e RA E FED 3 15 eene nennen nme ennemis 3 17 Slide Shaft Profile Adjustment escena 3 17 Head 3 20 Paper 5 2 3 24 Paper Skew Adjustment Sequence 3 24 Mounting Screw Information 3 25 Other Functional Requirements 3 28 Adjustment of Pinch Roller Supports 3 29 Visual Verification 00 eene 3 29 Observation of Paper Skew at Rear Media Alignment Mark 3 30 Observation of Paper Skew at Front Media Alignment Mark 3 31 Adjustment of the Mounting Screws 3 32 Paper Axis Calibration 3 33 22 0 eit saa eee veia ce 3 35 Color Deadband 3 36 Color Calibration E 3 38 Diagnostics 3 40 Clearing the 22 0 2 3 42 Firmware Download Upgrading for the 3 43 Internal Cabling and Signal Flow Diagrams 3 44 CadJet T 200 Service Manual
84. omplete silence Check parallel port connections and return to step 5 Internal Cabling and Signal Flow Diagrams Figures 3 28 and 3 29 are schematics of the major components and the cabling associated between them The diagrams depicts component boards or assemblies jack connections cables and signal flow It is to be used by the technician as an additional aid in troubleshooting and improve understanding of the printers theory of operation Figure 3 28 shows all cable connections to the MPWA and the power supply Figure 3 29 shows all cable connections to the carriage PWA Maintenance 3 44 200 Service Manual CadJet T AI8IN3SSV SNIIAN NIVIA vasa 4394315 B 4 SNIHOLIMS HOIIMS UMd 8 Figure 3 28 MPWA Connections Diagram 3 45 Maintenance CadJet T 200 Service Manual FOARIUVO 5 SNIIIM NIYIN Q ON VMd JOVINUVD 5 WOlldO NNIVAL Figure 3 29 Carriage PWA Connections Diagram 3 46 Maintenance Troubleshooting 4 Introduction Chapter 4 Troubleshooting consists of a table that is intended to aide the technician in troubleshooting the CadJet T 200 printers This table addresses symptoms with their possible causes and solutions Basic troubles
85. ompression of Frame Tensioner 5 12 5 6 xiii CadJet T 200 Service Manual List of Illustrations cont Figure Page Chapter 5 Assembly Disassembly cont 5 7 Removal of Display Assembly 5 13 5 8 Service Station REMOVA enne 5 14 5 9 Electronics Cover Removal 1 ccrtc ee dete e ea 5 16 5 10 Strain Relief Removal Installation seeeeeeenees 5 17 5 11 Frame TenslOler 2 ott oe en nutre x Ege dius 5 18 5 12 Carriage Belt erreki eee ipae yvy Une ey E Ripa 5 19 5 13 Carriage PWA Removal Installation 5 20 5 14 Paper and Encoder Sensor Removal 5 22 5 15 Paper and Encoder Sensor 5 23 5 16 Carriage Bushing Removal sse nennen 5 25 5 17 Carriage Bushing 5 26 5 18 Revealing the Power Supply Screws sse 5 31 5 19 Inner Platen Parts tr ena ane pad 5 32 5 20 Stabilizer Bracket REMOVAL 5 34 5 21 Disassembly of Plotter Prior to Removing the Inner Platen Parts 5 36 5 22 Removal of Lower Drive Shaft 2 5 37 5 23 Removing the Foam BIOGCk 1 2c cit eet ne d ee ua 5 38
86. ooting calibrating the printers The printers support both pre cut and roll media Media size is auto matically determined and hardclip limits are set accordingly Pre cut 1 1 CadJet T 200 Service Manual media uses different maximum plotting areas than roll media See the Printer Specifications in the User Guide for more details on the media size printable area A Centronics parallel connection is provided to interface with the host computer Network connections are made possible through the optional SEH print server Commands sent from the host computer can bein several forms including HP GL 2 HP RTL and EN RTL formats Drivers are supplied to support Windows based PC s 3 95 98 and NT as well as Macintosh and Power PC computers These printers expand upon ENCAD s tradition of delivering fast high quality color or monochrome graphics for a variety of applications ENCAD has made significant advances in designing these printers to respond to and anticipate our customers needs Principal features are summarized below Locally or Remotely Configured via Host Computer Take Up Basket PowerPC 33 MHz Microprocessor 8 User Configurable Settings 208 Jet Foam Filled Ink Cartridges Ink Priming System Snap On Ink Cartridge Caddies for longer print times between refilling Smart Cartridges Odometer Function Electronic Jet Compensation Fast CAD printing speeds General Description 1 2 CadJet T 200 Service Manual Ove
87. out on the Stabilizer Bracket to get a good angle on the screwhead 6 Loosen the front screw on the Servo Motor 7 See Figures 5 5 and 5 6 While you compress the back of the Frame Tensioner with your left index finger use your right hand to gently remove the Carriage Belt from the Servo Motor pulley Assembly Disassembly 5 11 8 9 CadJet T 200 Service Manual PUSH IN HERE TO SLACKEN CARRIAGE BELT Figure 5 6 Compression of Frame Tensioner Support the Servo Motor with one hand and remove the front screw Remove the ServoMotor out of the right side of the Platen Reinstalling the Servo Motor 1 Reinsert the Servo Motor inside the opening on the right of the Platen Guide the Servo Motor into the Platen Push the Servo Motor pulley through the top of the Platen and Y Arm and at the same time rotate the Servo Motor so that the connector is facing the BACK side of the Platen Align the screw holes with the screw hole openings Insert one screw into the Servo Motor and tighten it slightly Insert the second screw into the Servo Motor and tighten it Make sure both screws are torqued to 15 in lbs Compress the back of the Frame Tensioner with your left index finger and wrap the Carriage Belt over the Servo Motor pulley Make sure that the three guides on the inside of the belt are inserted in the three pulley grooves Assembly Disassembly 5 12 CadJet T 200 Service Manual 7 Move the Carriage Assembl
88. paration for shipment to ENCAD for replacement or repair or if it is to be stored for repair at your facility Removing the Right Side Plate Figure 5 3 Removal of the Right Side Plate To remove the Right Side Plate 1 Remove the Top Cover 2 Remove the Right Cover Assembly 3 Disconnect the MPWA connections and remove the MPWA Assembly Disassembly 5 6 CadJet T 200 Service Manual While holding the Right Side Plate remove the screws securing the side plate to the Platen See Figure 5 3 Slowly pull the Right Side Plate away from the Platen while feeding the cables through the side plate Reinstalling the Right Side Plate reinstall the Right Side Plate reverse the steps followed when removing the Right Side Plate 1 3 4 Feed the cables through the appropriate holes in the side plate then hold it in place against the Platen Reinstall the Right Side Plate to the Platen by securing with the screws Torque to 15 in lbs Reinstall the MPWA and all MPWA connections Reinstall the Right Cover Assembly and the Top Cover Reinstalling the MPWA reinstall the MPWA reverse the steps followed when removing the MPWA 1 Putonan ESD wrist strap 2 Removethe MPWA from the ESD bag 3 Hold the MPWA in place on the Right Side Plate while putting in the correct three screws in the holes located on Figure 5 2 Usea 2 Phillips screwdriver to torque the screws to 6 in Ibs Reinstalling the M
89. proper grounding or earthing An improper A C outlet power ground may cause banding due to excessive noise on the line between the neutral and ground Ensure the outlet has a clean zero ground potential with minimal noise between the neutral and ground Maintenance 3 16 CadJet T 200 Service Manual 14 Static electricity Using certain types of media i e polyester based media static electricity buildup within the media roll may effect the un roll resistance and cause momentary banding to occur However this has not been tested 15 Data corruption may also effect banding If you are using a parallel cable that is too long or improperly shielded the data being sent to the printer may get corrupted and cause artifacts in the print 16 Overlapping images of different types on the same print may create color bands between the images at the overlaps i e RGB images with CMYK images Alignments Adjustments The ENCAD CadJet T 200 printer is designed with a minimum of maintenance requirements in mind Calibrations include paper axis calibration deadband alignment and color calibration The mechanical adjustment requirements include the slide shaft profile cartridge head height and paper skew adjustments They do not require any electrical alignments Slide Shaft Profile Adjustment The CadJet T 200 printer Slide Shaft height is factory set and is firmly mounted on the outer sides and only has adjustments in the middle portion o
90. r a class B digital device pursuant to part 15 of the FCC Rules These limits are designed to provide reasonable protection against harmful interference in a residential installation This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instructions may cause harmful interference to radio communica tions User Instructions If the equipment does cause harmful interference to radio or television reception which can be determined by turning the equipment off and on the user is encouraged to try to correct the interference by one of the following measures Reorient or relocate the receiving antenna e Increase the separation between the equipment and receiver e Connect the equipment into an outlet on a circuit different from that to which the receiver is connected e Consult the dealer or an experienced radio TV technician for help Changes or modifications not expressly approved by ENCAD Inc could void the user s authority to operate the equipment CadJet T 200 Service Manual VDE Statement Hiermit wird bescheinigt da der CADJET T 200 in bereinstimmung mit den Bestimmungen der BMPT AmstbIVfg 234 1991 funkentst rt ist Der vorschriftsmaRige Betrieb mancher Ger te z B MeRsender kann allerdings gewissen Einschr nkungen unterliegen Beachten Sie deshalb die Hinweise in der Bedienungsanleitung Dem Zentralamt f r Zulassungen im Fernmeldewesen w
91. rge ESD Sensitivity 1 3 Warnings Cautions and Notes ssssssssssssseeeneeeeee eene nns 1 4 2 1 5 Contents of this Service 2 1 6 Technical SUpport RARE 1 8 Chapter 2 Theory of Operation 2 1 E EET 2 1 CadJet T 200 Printer General Block Diagram 2 1 Paper Media AXIS DIVE ire un eerte etre es rca un adu 2 3 The Camiage AXIS ex tg rv dece 2 4 Main Printed Wiring Assembly 2 5 MICFO PROCESSOR 2 6 Gate et ek e sexe plene tempns 2 6 Memory COURS zi 2 7 Flash EEPROM 2 7 DRAM 2 8 Serial EEPROM mnm 2 8 Stepper Motor Controller eise tet a 2 9 Servo Motor Controller 4 a A a a a aa 2 11 2 13 Interface Circuits Serial amp 2 14 Carriage Assembly CitGuits 2 rd ia due oe Rx aU 2 15 BICIEWEICIT INR
92. ric units Using either Up Arrow or Down Arrow rotate through the selections until the exact value of the measurement found is selected Press Select to accept the selection Maintenance 3 34 CadJet T 200 Service Manual Deadband Alignments Deadband calibration compensates for minute differences created when bidirectional printing is used Unidirectional printing is not affected by deadband There are two types of deadband tests Fast Deadband Slow Deadband Figure 3 26 Slow Deadband Figure 3 26 shows what the display will look like when printing the slow deadband test if it is out of alignment A correctly aligned printer will appear as if there is only a series of verticallines printed No difference between the top and bottom set of lines to the center set of lines would be apparent The SLOW DEADBAND calibration is a precision test that checks the firing time of the jets as related to the forward and reverse direction Allowable values for the Slow Deadband calibration is 2 1 0 1 and 2 The Fast Deadband test will print a display similiar to Figure 3 26 but will print the pattern for each of the four colors This is a visual check of the color deadband alignment only No adjustments can be made for this test To make adjustments see the Color Deadband Alignment section Allowable values for the Color Deadband alignments are from 1 to 12 Maintenance 3 35 CadJet T 200 Service Manual To perform the
93. rint can sometimes cause a band of lighter density color in the image Auto wipe may need to be temporarily turned off to prevent banding 7 Operator intervention If someone lifts up the media on the take up side of the printer while it is printing it can cause momentary banding in the print Lifting up the media while printing changes the inkjet head to media distance and will effect the printed dot size and placement of the ink droplets 8 Cartridge failures can cause banding electrical cartridge failures and partial clogging of the inkjets can produce banding With Inkjet Detection and Compensation technology electrical cartridge failures and clogging can be corrected for up to 20 failures per cartridge with minimal degradation of the output 9 Media width variations causing the media to drag on the media guides can cause banding Check the edges of the media for evidence of media drag and edge anomalies 10 Lower quality dithering Select the highest quality dithering pattern in the printer driver i e stochastic dithering 11 Deadband and cartridge calibrations If the deadband calibration is off or the cartridge calibration is off it can effect banding Also if one color seems to be causing the banding shifting the color calibration of that color 1 unit may help 12 Inkjet sputter If the cartridge heater is set too high inkjet sputter may occur causing intermittent white spots throughout the print 13 Im
94. rview Printers draw according to instructions issued from a host computer Every printer is engineered to understand a specific set of instructions and to execute each instruction in a precise manner In addition most printers are designed to execute predetermined characters automati cally without a specific line by line instruction from the program These characters are part of the printer s permanent memory Related Publications The following publication contains additional information which may be usefulin servicing the ENCAD Inc CadJet T 200 Color Inkjet Printers e ENCAD Quick Start Guide for the Cad Jet 200 P N 217892 xx ENCAD CadJet T 200 CD ROM P N 217893 xx Copies of these and other ENCAD Inc publications may be obtained by contacting your nearest authorized ENCAD Unc dealer or by contacting ENCAD s Technical Support and Service Department Electrostatic Discharge ESD Sensitivity PWAs Printed Wiring Assemblies associated with the printers have components sensitive to ESD electrostatic discharge Care must be taken to avoid damage to any of the components by following current ESD handling procedures and practices Always use an approved ESD grounding strap when handling or working with PWAs General Description 1 3 CadJet T 200 Service Manual Warnings Cautions and Notes Warnings cautions and notes are used when additional information instructions or care should be observed In
95. s cap nuts or openings in the Platen Align the right Lower Drive Shaft Support with the screw holes and insert the screws Using a Z2 6 or 8 Phillips screwdriver tighten them slightly Insert the middle Lower Drive Shaft Support through the Snap Plug opening see Figure 5 22 align it with the screw holes and insert the screws Using a Z2 6 or 8 Phillips screwdriver tighten them slightly Insert the left Lower Drive Shaft Support in the left end of the Platen so that the shaft goes through the brass bushing in the support The support should be oriented in the same manner as the support which is by the Stepper Motor See Figure 5 22 Align it with the screw holes and insert the screws Using a 2 6 or 8 Phillips screwdriver tighten them slightly Torque all the screws in the supports to 6 in lbs Insert the Foam Block Make sure that the Power Supply Cable is in the opening in the back of the Foam Block Also make sure that the Stepper Motor Assembly and Fan Assembly cables are also at the back corner of the Foam Block See Figure 5 23 Push the Foam Block in until it is flush against the Stepper Motor Assembly Make sure 1t 1s not tilted at an angle Turn the Platen onto its back Reach through the opening for the Fan Assembly with your left hand align the opening in the Fan Assembly with the right edge of the opening in the Platen and align the three screw holes If necessary push the Power Supply Cable towards th
96. ssembly See Figure 5 9 Lift up on the front left side of the Carriage Cover until it comes part way off of the Carriage Assembly Then lift up on the front right side of the Carriage Cover and move the Carriage Cover slightly to the left so that the back of it clears the Back Support Bracket 6 Liftupon the connector lock to unlock the Trailing Cable connector J6 on the Carriage PWA and remove the end of the Trailing Cable 7 Remove the Trailing Cable and Strain Relief from the Carriage Assembly by releasing the latch on the left lower side of the Strain Relief and lifting it off of the Carriage Assembly See Figure 5 10 8 Pull the Trailing Cable away from the double sided tape on the Stabilizer Bracket Remove the Trailing Cable from the plotter unit Assembly Disassembly 5 28 CadJet T 200 Service Manual Reinstalling the Trailing Cable 1 10 11 Apply two new pieces of double sided tape to the Stabilizer Bracket Ensure that the tape is in the same location as the original tape was Do not remove the top protective cover on the tapes yet Place the Trailing Cable on the Stabilizer Bracket Route the right end of the Trailing Cable through the Right Side Plate and connect the Trailing Cable connector at the J6 location on the MPWA Be sure to slide both sides of the connector lock shut at the same time Insert the Trailing Cable into the Strain Relief Assembly Insert the Strain Relief with Trailing Cable onto
97. ssembly with the thicker outer ring of plastic is facing up See Figure 5 11 Once the Idler Pulley Assembly is in position pinch the belt to hold the Idler Pulley Assembly in place and pullit into the Frame Tensioner so that the axle rests in the V shaped groove in the Frame Tensioner 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 Assembly Disassembly 5 27 CadJet T 200 Service Manual 15 Fit the Compression Spring over the post at the back of the Y Arm Assembly 16 Fit the notch in the front end of the Frame Tensioner over the notch in the front of the Y Arm Assembly 17 Depress the back of the Frame Tensioner and slip the Carriage Belt over the Servo Motor pulley Make sure that the guides in the Carriage Belt are properly fitted over the Servo Motor pulley 18 Gently move the Carriage Assembly from end to end and make sure that the Carriage Belt is not rubbing against any other parts Removing the Trailing Cable 1 Removethe Top Cover 2 Removethe Trailing Cable Cover 3 Removethe Right Cover Assembly 4 Disconnect the Trailing Cable connector at the J6 location on the MPWA Use the thumb and forefinger to pull forward on the connector lock and remove the Trailing Cable from the connector 5 With a flathead screwdriver press the Electronics Cover tab located in the upper slot on the left side of the Carriage A
98. step drive technology and consists of a stepper motor reduction gears lower drive shaft assembly and pinch rollers This can be seen in Figure 2 2 The reduction gear meshes the stepper motor to the lower drive shaft assembly which allows the media to advance or retract The purpose of the pinch rollers is to apply pressure to the media onto the drive shaft assembly to reduce the chance of slipping Misaligned pinch wheels is a main cause of skewing the media When skewing occurs pinch roller alignment may be required Theory of Operation 2 3 CadJet T 200 Service Manual The Carriage Axis Drive ENCODER STRIP BELT TENSIONING SERVO ASSY MOTOR Figure 2 3 Carriage Axis Drive The Carriage Axis Drive moves the printer s carriage assembly along the length of the printer The drive consists of a servo motor linear encoder strip drive belt and tensioning assembly These items are illustrated in Figure 2 3 The servo motor drive belt and tensioning assembly are the compo nents that actually drive the carriage assembly The servo motor drives the belt back and forth allowing the attached carriage assembly to be repositioned as required The tensioning assembly is spring controlled and allows the proper amount of tension on the belt The linear optical encoder strip 1s used to obtain the printers accuracy along the axis of the printer Itis made with 150 parallel lines per inch etched intoit By utilizing two optical enco
99. t can even cause the cartridge head height to become uneven To replace the carriage bushings follow the procedures for Carriage Bushing Replacement found in Chapter 5 Maintenance 3 11 CadJet T 200 Service Manual Servo Motor Winding Resistance Check Figure 3 7 Servo Motor 1 Disconnect the servo motor connection from J7 on the MPWA 2 Usinga standard ohmmeter or multimeter connect the meter leads to the two wires going to the motor 3 While manually rotating the servo motor monitor the readings on the meter The acceptable range is 4 10 ohms Typically the reading 1s 5 8 ohms 5 Ifthe measurement is found to be unsatisfactory replace the servo motor Maintenance 3 12 CadJet T 200 Service Manual Stepper Motor Winding Resistance Check Figure 3 8 Stepper Motor 1 Disconnect the stepper motor connection from J10 on the MPWA 2 Usingastandard ohmmeter or multimeter measure between pins 1 red wire and 3 3 Thereading 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 Ifeither measurement is out of tolerance replace the stepper motor Maintenance 3 13 CadJet T 200 Service Manual Banding Hardware vs Software The technician must be able to identify whether the banding that is being observed is related to either a hardware or a software problem The two examples in Figure 3 9 represent classic types of hardware
100. t the J3 location Pull forward on the connector lock and remove the flex cable from the connector 2 Disconnect the Trailing Cable connector at the J6 location Use the thumb and forefinger to pull forward on the connector lock and remove the Trailing Cable from the connector 3 Disconnect the Servo Motor connector Red and Blue wires at the J7 location Grasp the Servo Motor connector with the thumb and forefinger and pull straight out 4 Disconnect the Fan connector Red and Black wires at the J5 location Grasp the Fan connector with the thumb and forefinger and pull straight out 5 Disconnect the Stepper Motor connector at the J10 location Grasp the Stepper Motor connector with the thumb and forefinger and pull straight out 6 Disconnect the Power Supply connector at the J9 location Grasp the Power Supply connector with the thumb and forefinger and pull straight out Removing the MPWA Integrated circuits can be weakened or inactivated by elec trical discharge It is recommended that you be grounded to a static station by an ESD wrist strap to prevent ESD damage Assembly Disassembly 5 5 CadJet T 200 Service Manual To remove the MPWA 1 Putonan ESD wrist strap 2 Usea 2 6 Phillips screwdriver to remove the three remaining screws holding the MPWA onto the side plate See Figure 5 2 for locations Hold the top of the MPWA while removing the screws 3 Placethe MPWA in an ESD bag anti static bag in pre
101. the Carriage Assembly by sliding it onto the Strain Relief Support until it snaps firmly into place Connect the Trailing Cable to the J6 connector on the Carriage PWA Slide both sides of the connector lock shut at the same time Press the Trailing Cable down onto the double sided tape on the Carriage PWA Move the Carriage Assembly to the very left end of the Slide Shaft Remove the top protective cover on the 2 double sided tape on the right end of the Stabilizer Bracket and press the right end of the Trailing Cable onto the tape With the Carriage Assembly still at the very left end of the Slide Shaft and with the Trailing Cable still in line remove the top protective cover on the 2 double sided tape in the center of the Trailing Cable and press the Trailing Cable onto the tape Slide the Carriage Assembly back and forth several times to make sure that the Trailing Cable does not catch on anything and to make sure that the Carriage Assembly will travel the full length of the Slide Shaft Reinstall the Electronics Cover and Right Cover Assembly Also reinstall the Trailing Cable Cover and Top Cover Assembly Disassembly 5 29 CadJet T 200 Service Manual Removing the Power Supply and ON OFF Switch NOTE To gain access to all the screws that secure the Power Supply to the Platen the left leg must be loosened and turned or removed entirely from the Platen To the left leg assembly first remove the media basket Then re mo
102. this is to become the reference point Maintenance 3 18 CadJet T 200 Service Manual MEASURE MEASURE MEASURE FIRST LAST SECOND ADJUST IF NECESSARY Figure 3 11 Measurement Positions for Slide Shaft Measure the right side next to media alignment mark and note the difference Divide this amount by two Measure just off the center of the slide shaft and adjust the center turnbuckle with an open ended wrench if required for the average value the value found in step 3 See Figure 3 12 THIS IS THE TURNBUCKLE SCREW POSITION GAUGE AS CLOSE TO THE SCREW AS POSSIBLE THIS IS THE INNER SCREW lt POSITION GAUGE DIRECTLY IN FRONT OF IT Figure 3 12 Slide Shaft Profile Adjustment Maintenance 3 19 CadJet T 200 Service Manual For example If the Left 0 Right 40 004 then the center should be adjusted to 0 002 This will ensure a smooth plane of travelfor the carriage assembly There are no adjustments on either end of the shaft in all models Head Height Alignment Procedure Perform this procedure only when the encoder strip stabilizer has been removed from the Y Arm or whenever the alignment is in question The head height alignment procedure is to ensure that the correct amount of distance exists between the cartridge jet plate and the Platen See Figure 3 13 CARTRIDGE JET PLATE PLATEN HEAD HEIGHT d Figure 3 13 Carriage Head Height Tolerance 1 Remov
103. tically dirty encoder clean encoder strip strip defective encoder replace encoder strip strip bad MPWA replace MPWA Keypad Locked Up or Not Func tioning Properly firmware 1 reset printer problem 2 refresh or up grade firmware keypad assembly replace keypad damaged assembly faulty connection reseatorreplace between MPWA connector and keypad bad MPWA replace MPWA Troubleshooting 4 12 CadJet 200 Service Manual Table 4 1 Troubleshooting Table cont Symptoms Noisy Operation ink or paper debris in printer obstruction in path of carriage carriage bushings worn debris or obstruction in fan drive belt slipping on idler hardware or assemblies loose carriage height toolow lower drive shaft gears are dirty or misaligned noisy servo motor noisy stepper motor clean printer remove obstruction clean printer replace carriage bushings clean fan assembly replace frame tensioner spring or idler tighten hardware or assemblies perform Carriage Head Height Adjustment clean and or realign lower drive shaft gears replace servo motor replace stepper motor Troubleshooting 4 13 CadJet T 200 Service Manual Table 4 1 Troubleshooting Table cont Symptoms Line Quality Degraded ink cartridges dirty or clogged cartridge dimple region dirty or damaged color calibration needed deadband calibratio
104. to prolong the life of the printer It is not intended to repair or isolate an existing problem though it can sometimes be helpful in detecting a condition due to a weakened component that has not yet completely failed Below is a list of scheduled maintenance checks and their recom mended periodicity Clean external areas semiannually or as required Clean slide shaft weekly Clean service station daily Clean encoder strip weekly Clean cartridge dimples weekly of if prime fails Clean flex cable contacts weekly or if prime fails or cartridge 1s replaced Clean and inspect motor gears bimonthly Clean and inspect MPWA annually Clean and inspect carriage assembly annually Reseat connectors on MPWA annually Reseat connectors on carriage board annually Replace carriage bushings semiannually Replace service station wipers every 150 plot hours 3 1 CadJet T 200 Service Manual Cleaning Procedures Always turn the printer OFF remove the power cord and the interface cable before cleaning the printer An electri cal 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 For more persistent stains a small amount of liquid detergent may be used Cleaning intervals are determined by the en
105. to the left If the mounting screw on the left side is loosened turned counterclock wise the roller will move to the right NEVER LOOSEN OR TIGHTEN BOTH MOUNTING SCREWS AT THE SAME TIME ON THE SAME UPPER ROLLER SUPPORT If you have loosened one of the mounting screws and the roller has moved and you need to move the roller in the opposite direction you must tighten that mounting screw BEFORE loosening the other screw to move the roller in the opposite direction When tightening the first screw turn it clockwise with the torque screwdriver until the maximum torque is reached Then loosen the other screw AGAIN NEVER LOOSEN OR TIGHTEN BOTH MOUNTING SCREWS AT THE SAME TIME ON THE SAME UPPER ROLLER SUPPORT Maintenance 3 26 CadJet T 200 Service Manual Itis extremely important that you maintain downward pressure towards the floor on the head of each screw at the same time as you tighten or loosen the screws Each screw must be completely at the bottom edge of its hole in the back of the Y Bracket If this is not done the Upper Roller Support will not be perfectly level and will not perform its function properly Following all of the information in this section precisely will ensure that the Pinch Roller Support springs are deflected and the lower tail of the springs will always be pressed against the Pinch Roller Spacer without a gap as shown in Figure 3 19 MO
106. tor if out of tolerance bad bearings replace stepper motor Troubleshooting 4 2 CadJet 200 Service Manual Table 4 1 Troubleshooting Table cont Symptoms Media Does Not Move cont Internal ERROR Carriage Axis Failure media control switches are operating correctly firmware corrupted bad MPWA ESD electro static discharge dirty or lubricated slide shaft perform Servo Motor Winding Resistance check check servo motor for smooth movement obstruction in path of carriage may or may not be visible driver corrupted reload printer driver reload firmware replace MPWA ensure that all ESD components are properly installed then replace MPWA perform Slide Shaft Cleaning procedure replace servo motor bad bearings replace servo motor remove obstruction Troubleshooting 4 3 CadJet T 200 Service Manual Table 4 1 Troubleshooting Table cont Symptoms Internal ERROR Carriage Axis Failure cont dirty encoder strip dirt under the carriage bushings damaged encoder strip bad encoder sensor worn carriage bushings loose trailing cable connections cutter assembly malfunction damaged carriage drive belt system faulty trailing cable perform Encoder Strip Cleaning procedure remove carriage bushings and clean replace encoder strip reseat or replace encoder sensor replace carria
107. ure 5 8 Raise the right side of the Service Station out of the Platen Lift out the left side of the Service Station from the Platen and remove the Service Station Moving the Service Station farther to theright might be required to release the left side of the Service Station Reinstalling the Service Station Assembly 1 To install the Service Station position the Service Station inside the Right Cover and place the left side of the Service Station into the Platen Push down on the right side of the Service Station until the Service Station snaps into place Slide the Carriage Assembly to the right and back into the home position Lower the Top Cover Assembly Disassembly 5 15 CadJet T 200 Service Manual Remove the Carriage Assembly Carriage Belt and the Frame Tensioner 1 Removethe Top Cover and Trailing Cable Cover 2 Remove the Left and Right Covers Figure 5 9 Electronics Cover Removal Assembly Disassembly 5 16 5 7 CadJet T 200 Service Manual With a flathead screwdriver press the Electronics Cover tab located in the upper slot on the left side of the Carriage Assembly See Figure 5 9 Lift up on the front left side of the Carriage Cover until it comes part way off of the Carriage Assembly Then lift up on the front right side of the Carriage Cover and move the Carriage Cover slightly to the left so that the back of it clears the Back Support Bracket Lift up on the connector lock to unlock
108. ve three screws and loosen the last screw see Figure 5 18 that connects the left leg assembly to the platen While holding the plotter up turn the leg assembly in a clockwise direction to reveal the other two Power Supply Assembly screws Once the screws are revealed tighten the leg assembly to support the plotter 1 Removethe Top Cover and the Left Cover 2 Using a 2 Phillips screwdriver remove the 4 screws on the bottom of the Platen which hold the Power Supply in place 3 Pullthe Power Supply part way out of the Platen grasp the connector on the black and white ON OFF Switch Cable and remove the cable from the Power Supply 4 Pullthe Power Supply the rest of the way out of the Platen grasp the connector on the Power Cable coming from the MPWA and remove the Power Cable from the Power Supply 5 Ifthe ON OFF Switch needs to be replaced push the top of the switch out of the back of the Platen pry up on the bottom of the switch with a screwdriver from inside the Platen and push the switch out of the Platen Remove the ground wire from the Platen Assembly Disassembly 5 30 CadJet T 200 Service Manual LOOSEN Figure 5 18 Revealing the Power Supply Screws Assembly Disassembly 5 31 CadJet T 200 Service Manual Reinstalling the Power Supply and ON OFF Switch FOAM BLOCK LOWER ROLLER ASSY STEPPER DRIVE SHAFT CABLE MODULE FAN ASSEMBLY BRACKET N DRI
109. vice Manual Figure 3 1 Encoder Strip Cleaning Cartridge Dimples Cleaning CARTRIDGE DIMPLE AREA Figure 3 2 Cartridge Dimple Region Maintenance 3 5 CadJet T 200 Service Manual 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 The oils and dirt on fingers and hands can contaminate the area and result in misfiring of the inkjets Clean the cartridge dimple area by gently dabbing the area with a lint free cloth or cotton swab saturated with isopropyl alcohol Be sure to clean the yellow cartridge because it is not readily apparent that it is dirty The yellow ink is hard to see and could be overlooked Flex Cable Contact Cleaning FLEX CABLE CONTACTS Figure 3 3 Flex Cable Contacts Maintenance 3 6 CadJet T 200 Service Manual Cleaning the flex cable contact area is very important due to the ease of which this area can become dirty The flex for the yellow cartridge is deceiving because it is not readily apparent that it is dirty This also causes the cartridges to not receive all of the electrical s
110. vironment in which the printer is used Slide Shaft Cleaning Use only isopropyl alcohol on the slide shaft of the printer Damage to the stainless steel slide shaft may result if cleaned with water and not completely dried off Maintenance 3 2 CadJet T 200 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 carriage Extreme drag results in a carriage axis failure fault and will stop the carriage 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 Turnthe printer OFF Disconnect the power cord and interface cable 2 Raisethe printer lid 3 Moisten a clean cloth or paper wipe with isopropyl alcohol 4 Wipethelength of the slide shaft with the moistened cloth or wipe 5 Manually move the carriage assembly from side to side 6 Wipethe shaft again to remove any deposits left from the carriage 7 Close the cover and reconnect the power cord and interface cable turn the printer ON and perform the PRIME procedure Be sure that the carriage moves freely on the slide shaft Service Station Cleaning Ink and dust may build up on the service station resulting in contami nation which may smear the prints The service station is cleaned as follows 1 Turnthe printer
111. with a clean dry cloth only Assembly Disassembly 5 39 CadJet T 200 Service Manual e BUSHING 7 RETAINER 7 SPRING SCREW BOWED WASHER WASHER RETAINING RING RETAINING RING Figure 5 24 Lower Drive Assembly and Stepper Motor Assembly 1 Once the Inner Platen Parts have been removed remove the Stepper Motor from the Stepper Motor Bracket by unhooking the Extension Spring from the post on the Stepper Motor Bracket See Figure 5 24 2 Unscrew the Retainer Spring Post from the Spring Post and remove them from the Stepper Motor Bracket and Stepper Motor Assembly 3 Unscrew the Pivot Screw and Pivot Nut and remove them from the Stepper Motor Bracket and Stepper Motor Assembly 4 Remove the Stepper Motor from the end of the Lower Drive Assembly Assembly Disassembly 5 40 CadJet T 200 Service Manual If you are replacing the Stepper Motor Bracket you will need to remove the Retaining Ring Washer and Bowed Washer which are between the end of the Lower Drive Assembly and the Stepper Motor Bracket Reinstalling the Stepper Motor 1 Ts If you are replacing the Stepper Motor put the Stepper Motor Bracket onto the Lower Drive Assembly and then put the Bowed Washer the Washer and the Retaining Ring on over the end of the Lower Drive Assembly Make sure that the Retaining Ring snaps into the groove in the end of the Lower Drive Assembly Gently place the Stepper Motor Assembly onto the Stepper
112. y 5 26 10 11 12 18 14 CadJet T 200 Service Manual Slide the Carriage Assembly onto the left end of the Slide Shaft making sure that the Encoder Strip fits into the slot in the Slider and the Encoder on the Carriage PWA Guide the belt while sliding the Carriage Assembly from left to right on the Slide Shaft Move the Carriage Assembly to the left end of the Slide Shaft and align the left bushing on the Carriage Assembly with the left end of the Slide Shaft Insert the Strain Relief with Trailing Cable onto the Carriage Assembly by sliding it onto the Strain Relief Support until it snaps firmly into place See Figure 5 10 Place the Trailing Cable into the J6 connector lock on the Carriage PWA 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 Place the right side of the back of the Electronics Cover under the Trailing Cable Support Assembly and gently press down on the ends of the Electronics Cover until the latches snap into the Carriage Assembly Slide the Carriage Assembly to about the middle of the Slide Shaft and stretch out the Carriage Belt Insert the Carriage Belt into the Frame Tensioner so that the belt extends about an inch past the Frame Tensioner Holding the Carriage Belt and Frame Tensioner insert the Idler Pulley Assembly into the loop of the belt Make sure that the side of the Idler Pulley A
113. y back and forth to check the Carriage Belt tension 8 Reinstall the Trailing Cable Cover and the Top Cover Removing the Display Assembly 1 Disconnect the power cord and the interface cables 2 Remove the Right Cover Assembly 3 Disconnect the Display Cable connector at the J3 location on the MPWA Pullforward on the connector lock and remove the flex cable from the connector Figure 5 7 Removal of Display Assembly 4 Usinga 1 Phillips screwdriver remove the 2 screws from the bottom of the Display Assembly See Figure 5 7 Assembly Disassembly 5 13 CadJet T 200 Service Manual Reinstalling the Display Assembly Reinstall Display Assembly by reversing the procedure used to remove it When reinserting the Display Cable make sure that the silver fingers on the end of the cable face the Display PWA Route the Display Cable over the groove on the top of the Right Side Plate down between the Right Side Plate and the MPWA and around to the front ofthe MPWA near the J3 connector Torque Display Assembly screws to 6 in lbs Removing the Service Station Assembly SERVICE STATION Figure 5 8 Service Station Removal 1 Place the Top Cover in the open position 2 Move the Carriage Assembly to the left side of the Slide Shaft Assembly Disassembly 5 14 CadJet T 200 Service Manual Reach into the Right Cover and pull back on the Service Station release tab located on the far side of the Service Station See Fig

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