Service Manual DECcolorwriter 1000 Color Printer Warning The following servicing instructions are for use by qualified service personnel only. To avoid personal injury, do not perform any servicing other than that contained in operating instructions unless you are qualified to do so. First printing February 1994 Order Number: EK-LF02E-FM.A01 Digital Equipment Corporation Maynard, Massachusetts U.S.A.
If acquired subject to FAR or DFARS, the following shall apply: n Unpublished — rights reserved under the copyright laws of the United States. n Restricted Rights Legend — Use, duplication or disclosures by the government is subject to restrictions as set forth in subparagraph (c) (1) (ii) of the Rights in Technical Data and Computer Software at DFARS 252.227-7013, or in subparagraph (c) (2) of the Commercial Computer Software – Restricted Rights clause at FAR 52.227-19, as applicable. Tektronix, Inc.
Users safety summary Terms in manual: CAUTION WARNING Conditions that can result in damage to the product. Conditions that can result in personal injury or loss of life. Power source: Do not apply more than 250 volts RMS between the supply conductors or between either supply conductor and ground. Use only the specified power cord and connector. Refer to a qualified service technician for changes to the cord or connector.
Service safety summary For qualified service personnel only: Refer also to the preceding Users Safety Summary. Do not service alone: Do not perform internal service or adjustment of this product unless another person capable of rendering first aid or resuscitation is present. Use care when servicing with power on: Dangerous voltages may exist at several points in this product. To avoid personal injury, do not touch exposed connections and components while power is on.
Contents 1 General Information DECcolorwriter 1000 1-2 Plain-paper printing 1-2 Print engine assemblies 1-3 Combination sensors and their meanings 1-5 Transfer roll type sensing 1-5 Media tray type sensing 1-6 Image processor boards 1-7 Rear panel 1-8 Front panel 1-10 Front panel LED service mode error codes Specifications 1-12 Regulatory specifications 1-16 2 1-11 Installing the Printer and Drivers Pre-install questions for customers 2-2 Unpacking 2-5 Inventory for the DECcolorwriter 1000 printer 2-5 S
3 Verifying the Printer and Host Connections Verifying printing to a Macintosh 3-1 Selecting the printer via the Chooser 3-1 Print the directory from Macintosh 3-2 Verifying that an application communicates to the printer 3-2 Using the Error Handler utility 3-3 Verifying printing to a PC 3-3 DOS connection verification 3-3 Windows 3.
Paper path in operation 5-9 Paper pick-up 5-9 Drum loading 5-11 Printing 5-12 Print unloading 5-14 Power supply 5-15 DECcolorwriter 1000 image processor 5-17 Image rendering technology 5-17 6 Troubleshooting System power-up sequence 6-1 Print engine troubleshooting 6-2 Verifying image processor operation by using the Test Pattern Generator 6-2 Verifying print engine operation by using its self-test print 6-3 Verifying power supply operation 6-3 Measuring power supply voltages 6-3 Inspecting the power supp
Print engine self-diagnostics 6-18 Starting service mode (self-diagnostics) 6-18 Displaying error codes on the front panel 6-18 Problems and solutions 6-19 Print engine error codes and their causes 6-19 Power problems 6-24 Front panel indicators 6-24 Macintosh printing problems 6-25 PC DOS printing problems 6-26 Windows printing problems 6-27 Workstation printing problems 6-28 DECcolorwriter 1000 image processors 6-29 Image processor normal operation indicators 6-29 Image processor hard and soft error indic
8 FRU Disassembly/Assembly Required tools 8-1 Lower tray assembly 8-2 Printer cabinet panels 8-3 Paper-feed module 8-5 Accessing the pick roller, aligning roller, and the lower feed roller 8-6 Paper-pick roller, clutch, and paper-empty flag 8-9 Lower aligning roller, clutch, and paper-pass sensorþ1þflag 8-11 Removing the upper aligning roller 8-13 Removing the feedþroller 8-14 Removing the exitþrollers 8-15 Bail roller assembly 8-16 Thermal head 8-17 Drum 8-19 Motors 8-23 Paper-feed motor 8-23 Drum motor 8
9 Checks and Adjustments Required tools summary 9-1 Printing test patterns 9-2 Printer self-checks 9-4 Thermal head motor check 9-5 Transfer roll feed check 9-5 Paper-path check 9-6 Tray select 9-6 Reflective sensor auto-calibration 9-7 Switch and interrupt sensor checks 9-8 Calibrating the transfer roll mark sensors (reflective sensors) Calibrating the paper clamp sensor (reflective sensor) 9-10 Drum belt tension adjustment 9-11 Top margin adjustment 9-12 Adjusting for best print quality 9-14 Thermal head
Service Manual xi
Figures Figure 1-1. The DECcolorwriter 1000 (shown with the Lower Tray Assembly) Figure 1-2. Internal features of the DECcolorwriter 1000 print engine Figure 1-3. Sensors and switches on the DECcolorwriter 1000 print engine Figure 1-4. Features of the DECcolorwriter 1000 image processor board Figure 1-5. DECcolorwriter 1000 rear panel Figure 1-6. DECcolorwriter 1000 front panel Figure 2-1. The DECcolorwriter 1000 packaging Figure 5-1. The thermal-wax transfer print process Figure 5-2.
Figure 8-14 Removing the bail roller assembly Figure 8-15 Removing the thermal head Figure 8-16 Removing the drum belt and pulley Figure 8-17 Removing the front idlerþroller Figure 8-18 Removing the drum's right end bushing Figure 8-19 Removing the drum Figure 8-20 Removing the paper-feedþmotor Figure 8-21 Removing the drum motor Figure 8-22 Removing the transfer roll take-up gear Figure 8-23 Removing the transfer roll take-up motor Figure 8-24 Freeing the thermal head drive belt and th
Figure C-1. Print engine control board connector diagram Figure C-2. Print engine wiring diagram Figure D-1.
Tables Table 1-1. Transfer roll core sensor combinations Table 1-2. Tray switch sensor combinations Table 1-3. DECcolorwriter 1000 rear panel DIP Switches Table 1-4. Service mode error code summary Table 1-5. Physical dimensions Table 1-6. Printer clearances Table 1-7. Functional specifications Table 1-8. Electrical specifications Table 1-9. Environmental specifications Table 2-1. Configuration page settings for DECcolorwriter 1000 printers Table 2-2. Values for modifying the DEVPARAMS.
Service Manual xv
Chapter 1 General Information This service manual contains information useful to verify operation, troubleshoot, repair, adjust, and maintain the DECcolorwriter 1000. The first half of this manual familiarizes you with the printer and provides information on installing and verifying the printer and training printer users. The latter half of the manual includes troubleshooting guides, adjustment procedures, assembly/disassembly procedures and an FRU list.
1 General Information DECcolorwriter 1000 DECcolorwriter 1000 is an Adobe PostScript Level 2, two page-per-minute, color thermal-wax transfer printer. Besides PostScript, it also supports the Hewlett Packard-Graphics Language (HP-GL) printer language. DECcolorwriter 1000 prints at an addressability of 300 dots-per-inch. The printer features a single paper tray with an optional lower tray assembly which gives the printer a dual tray capability.
General Information 1 Print engine assemblies Thermal head lift motor I/O board Thermal head fan Torque limiter Card cage Thermal head Image processor board Drum Upper exit roller Exit roller belt Engine control board Lower exit roller Paper-feed module Interconnect board Feed roller Drum motor Drum belt Power supply Paper-feed motor Transfer roll take-up motor Pick roller Print-feed circuit board 8699-02B Figure 1-2.
1 General Information Transfer-rolllow sensor Transfer roll core sensor (right) DIP Switch 1 Thermal head position sensors (2) -- mounted on top cover DIP Switch 2 Drum-homeposition sensor TEST button Transfer roll core sensor (left) Paper-pass sensor (2) Transfer roll mark sensor Tray sensors (3) Top-coveropen sensor Paper-exit sensor Paper clamp sensor Aligning roller solenoid Front-cover-open sensor Paper-empty sensor Paper-pass sensor (1) Paper-pick solenoid Figure 1-3.
General Information 1 Combination sensors and their meanings Combinations of sensors are used by the DECcolorwriter 1000 to determine the type of transfer roll and the type of media tray installed in the printers. Transfer roll type sensing The combinations of the two transfer roll core sensors “tell” the print engine what type of transfer roll is installed. The length of the cores (long or short) actuate the switches. Long cores close the switches, turning them on. Table 1-1.
1 General Information Media tray type sensing The combinations of the three tray sensors “tell” the Phaser 200e what type of paper tray is installed. (The print engine does not detect the type of media installed in the tray; it only detects the particular tray used with the media.) The tray sensors are located on the right-side interior of the paper tray slot. There are four different tray types: n Letter Perforated Media. This tray is used for paper and transparency film with the tear-off perforation.
General Information 1 Image processor boards ROM Font SIMM RAM SIMM J2 J14 I/O connector J6 J1 Interconnect board connector 8699-05 Figure 1-4.
1 General Information Rear panel Connectors The rear panel of the DECcolorwriter 1000 printer features the host interface connectors to the printer. They include the following connectors: n Standard parallel n RS-232 serial n LocalTalk The DECcolorwriter 1000 rear panel also features DIP switches to control certain aspects of the printers’ imaging. You can also use the DIP switches for controlling the self-tests of the printers’ image processor board.
General Information 1 The following figure illustrate the rear panel of the DECcolorwriter 1000. Health LED DIP switches Status LocalTalk® 1 2 3 4 Reset * On Color Correction * Run Off * See Below Parallel Serial (RS-232) DECcolorwriter 1000 8699-07 Figure 1-5. DECcolorwriter 1000 rear panel Table 1-3. DECcolorwriter 1000 rear panel DIP Switches Switches 220e 1 (down) Normal operation (up) Reset 2 through 4 Diagnostics modes, serial parameters fixed at 1200 baud.
1 General Information Front panel The front panel consists of seven LEDs indicating the printer's normal operating status. POWER: Illuminates to indicate that the power supply is generating +5 VDC. READY: On indicates the printer is idle. Blinking indicates the printer is receiving and processing data. COVER: On indicates either the front or top cover is open. TRANSFER ROLL (RIBBON): On indicates the transfer roll is low and will soon need to be replaced. Blinking indicates the transfer roll is empty.
General Information 1 Front panel LED service mode error codes Detected error conditions are displayed on the front panel as LED patterns. The following table lists the service mode error codes which are displayed while the printer is in service mode. (Service mode is explained in Chapter 9, “Checks and Adjustments.”) These codes are more specific than the error codes displayed during normal operation (see the previous topic “Rear panel).
1 General Information Specifications These specifications apply to the DECcolorwriter 1000 printer. Table 1-5. Physical dimensions Dimensions Value Height 28 cm. (11 ins.) 37 cm (14.5 ins.) with Lower Tray Assembly Width: 342 cm (13.4 ins.) Depth: 42.5 cm (16.7 ins.) Weight: Approximately 18 kgs (40 lbs). Print engine weight only; add 26.4 kgs (12 lbs.) for Lower Tray Assembly. Shipping weight is not to exceed 32 kgs (70 lbs). Table 1-6. Printer clearances 1-12 Clearances Value Top: 45.
General Information 1 Table 1-7. Functional specifications Characteristic Specification Printing process Sequential surface thermal transfer printing (thermal-wax transfer). Transfer rolls Wax-impregnated transfer rolls. The printer automatically senses the transfer roll type by the coding on the leading edge of the yellow band. 3-Color Transfer Roll features sequential bands of yellow, cyan, and magenta; 342 prints per roll.
1 General Information Table 1-8. Electrical specifications Characteristic Specification Primary line voltages 87 to 128 VAC (115 VAC nominal) 174 to 250 VAC (220 VAC nominal) Input voltage range is switch-selectable. Primary voltage frequency range 47 to 63 Hz Power consumption 235 watts at idle. (800 BTUs/hour) – Power consumption for the printer will be somewhat higher due to image processor electronics which draw power from the print engine. Current rating 115 VAC configuration – 7 amp max.
General Information 1 Table 1-9. Environmental specifications Characteristic Temperature Operating Non-operating (power off) Storage (without transfer roll) Specification 15 to 30 C° (59 to 86° F) 0 to 40° C (32° to 104°F) -20 to 60° C (-4 to 140° F) Humidity Operating Non-operating 20 to 80% relative humidity, non-condensing 10 to 90% relative humidity, non-condensing Altitude Operating Non-operating 0 to 4570 m (15,000 ft.) at 25°C 0 to 15200 m (50,000 ft.
1 General Information Regulatory specifications The DECcolorwriter 1000 is a recognized component in conformance with the following regulatory standards: 1-16 n The packaged product meets National Safe Transit Committee Test Procedures. n UL 1950 Information Processing & Business Equipment. n CSA C22.2 No. 950 Safety of Information Technology Equipment, Including electrical Business Equipment. n IEC 950 (1991) Second Edition; EN60950 Information Processing & Business Equipment.
Chapter 2 Installing the Printer and Drivers This chapter discusses installing the printer and its drivers. Installation consists of three main functions detailed in this and the next two chapters of this manual: n Chapter 2 “Installing the Printer and Drivers.” The first portion of installation instructions, this chapter, consists of five basic processes: n Pre-installation interview. This is a phone interview to verify that the customer is ready for the printer.
2 Installing the Printer and Drivers Pre-install questions for customers Prior to installing a DECcolorwriter 1000, you should contact the customer and verify that he or she has prepared an appropriate location for the printer. You will also want to ensure that you have all the information you need to install the printer at the customer's site.
Installing the Printer and Drivers n 2 Customers must provide the particular interface cable or network adapter they need to use with the printer. n 10 ft. parallel cable n Serial, 25-pin to 25-pin, 3 m (10 ft.), null modem n Serial, 9-pin to 25-pin, 3 m (10 ft.), null modem For AppleTalk installations, customers must provide the appropriate network adapter to the printer's 9-pin circular LocalTalk connector. Customers can obtain an adapter from their dealer.
2 Installing the Printer and Drivers Driver software must be installed on the host computer to use the printer to its fullest potential. A host computer must meet the following conditions: Mac n Mac II, Performa, Centris or Quadra n Operating System 6.0.7 or later n 4 Mbytes RAM PC n IBM AT, PS/2 or compatible, with a 386 or later CPU, a 5.25- or 3.5-inch floppy drive, and a hard disk drive, 2 Mbytes RAM DOS system DOS 3.
Installing the Printer and Drivers 2 Unpacking Inventory for the DECcolorwriter 1000 printer n Printer n Paper tray n Power cord n Getting Started folder n Cleaning kit n Supplies information sheet n Transfer roll n Paper n Transparencies n User manual n Printer drivers and utilities reference manual n Printing utilities and driver diskettes n Optional Lower Tray Assembly (with paper tray) Service Manual 2-5
2 Installing the Printer and Drivers Note Prior to repacking a printer, ensure that the paper clamp is positioned under the bail rollers. This prevents the bail rollers from “denting” the soft material of the drum. In normal operation, the paper clamp is automatically parked in this position when the printer is not printing. 8699-69 Figure 2-1.
2 Installing the Printer and Drivers Setting up the printer Installing the printer is explained in detail in either the DECcolorwriter 1000 User Manual. The following is a brief list of the steps you follow to unpack and set up the printer. 1. Place the printer in its working location. 2. Open the top cover and remove the shipping pad that protects the printhead. Also remove the shipping blocks on either side of the drum. 3. Install a transfer roll. 4. Close the top cover. 5.
2 Installing the Printer and Drivers Cabling the printer Note Carry spare serial and parallel cables. You can use them if you encounter a defective cable or as an alternate means of testing the printer-to-host communications. This topic explains making a hardware connection between a DECcolorwriter 1000 and its host computer, setting the communication parameters for the printer's serial and parallel ports to be compatible with the user's host computer and driver installation.
Installing the Printer and Drivers 2 Connecting the printer to a workstation Direct connection to a workstation 1. Turn off the printer. Turn off the host computer. 2. Attach the parallel interface cable to the workstation. Attach the other end to the printer. Alternatively, attach the serial cable to the workstation's serial port. Attach the other end to the printer's serial port. 3. Turn on the printer and the computer.
2 Installing the Printer and Drivers Turning on the printer The startup page When you turn on a DECcolorwriter 1000 printer, it executes a series of self-tests to determine if there are any problems with the PostScript interface. After running self-tests, the printer prints a startup page if it has not been disabled. (The factory default condition is to have the startup page enabled.) After running self-tests and printing the startup page, the printer is ready for operation.
Installing the Printer and Drivers 2 The configuration page To provide further diagnostic information, the printer is able to print a configuration page. The configuration page lists the values that the printer stores in its NVRAM. These values can be informative when troubleshooting the printer, particularly networked operations. A downloadable PostScript utility file, found on the Drivers and Utilities diskette, allows you to print the configuration page.
2 Installing the Printer and Drivers Table 2-1. Configuration page settings for DECcolorwriter 1000 printers (cont'd.
Installing the Printer and Drivers 2 Driver and communication setup Loading the Macintosh driver Note Turn off any anti-virus software running on the Macintosh before installing the Digital software. DECcolorwriter 1000 printer uses the Adobe PostScript Level 2 language. To take advantage of the Level 2 features, the printer features a DECcolorwriter 1000-specific driver which appears in the Chooser along with the LaserWriter 7.0.x driver.
2 Installing the Printer and Drivers Installing the custom driver for Windows 3.1 The Windows driver is a Windows PostScript driver customized for a DECcolorwriter 1000. These instructions assume a basic familiarity with Windows operation and terminology. For additional information about Windows, refer to your Microsoft Windows documentation. 1. Insert the Windows 3.1 Printer Driver diskette into your computer’s disk drive, for example, drive B:. 2. Start Windows. 3. Open the Control Panel.
Installing the Printer and Drivers 5. 2 Select the port the printer is connected to. Your printer is connected to your computer through one of the computer's communications ports. You need to tell the driver which port your printer uses so that the driver can print your documents. The two main types of communications ports are parallel ports and serial ports; your computer may have one or more of each.
2 Installing the Printer and Drivers 7. Choose the OK button to return to the Printers dialog box, then choose the Setup button. A dialog box appears with the name of the printer you selected across the top. Use this dialog box to select paper source, paper size, and image orientation. 8. Choose the Options button to see the Options dialog box. Make sure that the Color box is checked to print in color. 9. From the Options dialog box, choose the Advanced button to see the Advanced Options dialog box.
Installing the Printer and Drivers 2 Updating the standard Microsoft Windows PostScript driver If a customer prefers to use the standard Microsoft Windows PostScript printer driver instead of the custom driver for Windows, follow these instructions. This update procedure provides printer page size information for applications within Windows using the standard driver. However, color adjustments and other PostScript Level 2 features are available only with the custom Windows 3.
2 Installing the Printer and Drivers Check existing printer object port assignments before installing a new printer to be sure there is no conflict. Once you are familiar with existing printer objects (drivers and ports associated with these objects) you can install a new printer. In the procedure below the printer remains associated with LPT1, and you will set up a new printer object for LPT2. Following are the steps to create the LPT2 PRINTER object: 1.
Installing the Printer and Drivers 2 b. Select the Printer Driver Tab. Confirm that the DECcolorwriter 1000 is selected (highlighted). Double-click on the DECcolorwriter 1000 driver to configure the Printer Properties. This is where you can define printer paper sizes and orientation. These settings can be adjusted from within software applications as well. To get started, set Forms to Legal-size paper. This is the recommended setting.
2 Installing the Printer and Drivers Configuring the printer's serial port for a PC Use the PostScript command file DEVPARAM.PS (also located on the Utilities diskette) to modify the printer’s serial port settings. To modify DEVPARAM.PS you should be familiar with the PostScript setdevparams command. This file lets you configure the printer's serial port. The following example sets flow control to Xon/Xoff, parity to none, data bits to 8, stop bits to 2 and the baud rate to 9600.
Installing the Printer and Drivers 2 When you change the settings for the serial port, the baud rate DIP Switch 7 on the printer's back panel must be down before the changes will take effect. 1. Use a text editor or word processor to modify the DEVPARAMS.PS file. (Be sure to save the file as a text-only file.) Substitute the values you want for the values used in the sample DEVPARAM.PS file. The possible values for each parameter are listed in the following table.
2 Installing the Printer and Drivers Using printcap to configure a Unix workstation for the printer's serial port The printcap file configures the workstation's lpr queues. The file is usually found in the workstation's /etc directory. The printer's rear panel switch settings should all be down. Use a null modem cable, since the printer is set up as a DTE device.
Installing the Printer and Drivers 2 px:\ :br#9600:rw:\ :fc#00000374:fs#00000003:\ :xc#0:xs#0040040:\ :mx#0:sf:sh:\ :sd=/var/spool/px:\ :if=/var/spool/px/if:\ :lp=/dev/ttya: 5.
2 Installing the Printer and Drivers 2-24 DECcolorwriter 1000
Chapter 3 Verifying the Printer and Host Connections In this chapter, you verify that the host computer can send files to the printer. This chapter assumes that the printer and the printer drivers have been properly installed as explained in the previous chapter “Installing the Printer and Drivers.” Verifying printing to a Macintosh Selecting the printer via the Chooser This procedure applies to both operating system version 6.0.7 (and higher) and system 7.0 (and higher). 1.
3 Verifying the Printer and Host Connections If you do not see the printer listed in the dialog box, then the printer is not communicating with the Macintosh. Check the printer's cable connection to the network. Also check the printer to see if its rear panel health LED is blinking. Ensure that the correct network is selected, in the event that the Macintosh is connected to more than one network (such as both LocalTalk and Ethernet).
3 Verifying the Printer and Host Connections If problems occur at this point, download the error handling utility to the printer as explained in the next procedure. Refer to the DECcolorwriter 1000 Drivers and Utilities Printing Reference which provides information on using the printer with specific applications. Using the Error Handler utility If the Macintosh does not print to the printer, download one of the Tek Error Handler utility files to the printer. 1.
3 Verifying the Printer and Host Connections Windows 3.1 driver verification Using the Windows Paint application, verify that the PC, running under Windows 3.1, can print to the printer. 1. If it is not already running, launch Windows by typing this command: WIN 3-4 2. Launch the program manager by double-clicking the Program Manager icon. 3. Open the Accessories window by double-clicking the Accessories icon. 4. Double-click on the Write icon.
Verifying the Printer and Host Connections 3 OS/2 connection verification Note The Print Screen function is controlled from within the OS/2 System folder. 1. Open the System folder, then open the System object. 2. Click on the Print Screen Tab to view the Print Screen settings. Be sure that Enable has been selected. With Enable Print Screen selected, the following options are available. a. You may print the contents of a window by pointing to that window and pressing Print Screen. b.
3 Verifying the Printer and Host Connections Veryifing printing to a PC using the Error Handler utility If a PC has trouble printing directly to the printer, download one of the Advanced Error Handler utility files to the printer. 1. Locate the ADVEHAND.PS file in the Printer Utility diskette. 2. Copy the file ADVEHAND.PS to the PC's hard disk or use the file from the diskette. 3. Use the DOS COPY command to send the file to the printer. For example: COPY advehand.ps LPT1:.
Verifying the Printer and Host Connections 3 Verifying printing to a workstation using the Error Handler utility If the workstation host does not print to the printer, download the Advanced Error Handler utility to the printer. 1. Locate the ADVEHAND.PS file in the PrinterUtility diskette. 2. Copy the file ADVEHAND.PS to the workstation's hard disk or use the file from the diskette. 3. Make sure that the printer port is configured to receive PostScript, then send the file to the printer.
3 Verifying the Printer and Host Connections 3-8 DECcolorwriter 1000
Chapter 4 Key Operator Training This section covers the last portion of the printer installation: training the printer's key operator. The steps you follow here place an emphasis on encouraging the key operator to read and use the printer's user manual and to clean and care for the printer.
4 Key Operator Training Printer controls and indicators Front panel LEDs: Explain the meanings of the front panel LEDs. n Show where these indicators are explained in the user manual. Error reporting: Explain how error conditions are displayed on the front panel. n Show where error conditions are explained in the user manual. Rear panel DIP switches: Explain the functions of these switches. n Show how to reset the printer with DIP Switch 1.
4 Key Operator Training Loading media Paper/transparency: Demonstrate how to load paper or transparency film into a paper tray. n Emphasize to the customers not to touch the printing surface of the media; handle it by the edges only. Fingerprints can affect print quality. n Explain that the customers should not bend the media (especially transparency film) too sharply. Otherwise print quality may be affected. n Demonstrate fanning the media prior to installing it in the paper tray.
4 Key Operator Training Clearing paper jams Paper input (pick jam): Show how you remove the tray to clear a paper-pick jam. n Show where this is explained in the user manual. n Point out the paper empty flag (inside the paper feeder). Emphasize to customers that they should not force the tray in or out of the printer and possibly break the flag. n Point out the pick rollers.
Key Operator Training 4 Supplies ordering The printer is shipped with the latest version of the supplies information sheet. It lists all the available supplies for the printer, as well as printer accessories, such as software and printer stands, that customers may be interested in. Additionally, some supplies are listed in the user manual. United States: Customers can call 1-800-DIGITAL (1-800-344-4825) to place a supplies order. Open Monday through Friday, 7:30 am to 8:00 pm (EST).
4 Key Operator Training 4-6 DECcolorwriter 1000
Chapter 5 Theory of Operation This chapter provides a high-level description of the thermal-wax transfer printing technology and how the printer employs it. Following that is a high-level discussion of the image processor board and how it receives data from a host computer and transforms it into data for the print engine.
5 Theory of Operation Print engine Wax transfer — the engine's printing technology To make colored prints, the print engine uses a color printing method called sequential surface thermal transfer printing. Simply said, the print engine prints by melting dots of colored wax from a Mylar ribbon onto a piece of paper. The benefits of this method are high-resolution printing, easy maintenance, and fast printing. The print process Figure 5-1 illustrates the printing process employed by the print engine.
Theory of Operation 5 During printing, the print engine moves the paper past the thermal head three times. During each pass, individual thermal head elements melt tiny dots of wax from the transfer roll's colored bands; first from the yellow band, then the magenta band, and finally, cyan. The three overlaid colors combine on the paper to produce a complete color image. After the three passes, the finished copy is ejected from the printer.
5 Theory of Operation Plain-paper printing Using the special 4-pass, Plain Paper Transfer Roll, the printer can print on ordinary Bond paper. In this process, a special coating is applied to the paper in its first pass past the thermal head. The coating supplies a smooth, flat surface for the yellow, magenta and cyan wax applied in the following three passes. The coating is applied only to the portions of the paper where colored wax is to be applied.
5 Theory of Operation Image data DECcolorwriter 1000 print engines must receive data in a specific format to correctly print the image that the data represents. The printer's image processor board must convert the data into the correct format. The following topics describe some of the data formatting that the host or the interface module must perform. The print engine prints an image in a raster format, line by horizontal line, dot by dot.
5 Theory of Operation Engine control board block description The engine control board receives color bitmaps from the image processor board. It also controls the print engine's printing process, including all motors, sensors, and the thermal head. The block diagram shown in Figure 5-2 illustrates the functional operation of the print engine control board.
5 Theory of Operation CPU All DECcolorwriter 1000 print engine CPUs consist of a microprocessor, ROM, RAM and a clock circuit. The CPU is the heart of the print engine. It controls the timing controller, the mechanical controller, and print engine diagnostics. Interface buffers The interface buffers receive data from the image processor board, where the image data was received from the host computer and processed into data for the print engine.
5 Theory of Operation Thermal head controller The thermal head controller uses the information received from the heat controller, in conjunction with timing signals, to drive the thermal head with the data stored in the line memory buffer. The head controller generates four different strobes. These four strobes are combined to provide seven drive pulses ranging from 435 uS for “cold” thermal elements, to 200 uS for “hot” elements.
5 Theory of Operation Paper path in operation This topic discusses the movement of a piece of paper from the paper tray, through the printing process, to the printer's output tray. Paper pick-up Paper pick-up takes place at the paper-feed unit. It begins when the pick-up solenoid energizes and the paper-feed motor rotates forward. This causes the pick-up roller (gear-driven by the paper-feed motor through a one-way clutch) to force a sheet of paper from the tray to the feed rollers.
5 Theory of Operation Caution Never rotate the pick rollers in the reverse direction. Paperpass sensor 2 Aligning roller Feed roller Paperpass sensor 1 Path from paper tray Path from second feeder paper tray Pick-up rollers Paper tray 8699-10 Figure 5-3. The paper pick process Drum loading As the paper passes beyond the aligning rollers, it triggers paper-pass sensor 2. This activates the transfer roll feed motor long enough to apply tension to the transfer roll, pulling it taut.
Theory of Operation 5 The drum slowly rotates forward (clockwise, viewed from the left side), automatically closing the spring-loaded clamp until the paper-clamp sensor detects the paper loaded in the clamp, and then speeds up to draw more of the paper around the drum. This continues until the leading edge of the paper (the clamped end) is beneath the thermal head, ready for printing. Drum rotates forward to close clamp Paper clamped to drum Paper clamped sensor 8699-12 Figure 5-5.
5 Theory of Operation Printing After checking the transfer roll's position (through the transfer roll mark sensors) the thermal head lift motor rotates an eccentric cam to push the thermal head down from its standby position to its print position, sandwiching the transfer roll and paper together between the thermal head and the drum.
Theory of Operation 5 Unlike other thermal wax printers, the DECcolorwriter 1000 does not reverse the drum to “back up” the print to the start position for each pass during printing. This is one of the reasons for the DECcolorwriter 1000's faster print times. Between passes, the thermal head raises to allow the paper clamp to pass 8699-15A Figure 5-8.
5 Theory of Operation Print unloading To unload the print after printing, the drum rotates clockwise until the trailing edge of the paper flips out into the exit path, then the drum motor rotates the drum counterclockwise to the clamp-open position. This also pushes the print to the lower exit rollers. The paper-feed motor, running backward for a set amount of time, drives the lower and upper exit rollers, which pull the print through the rollers and out to the printer's output tray.
Theory of Operation 5 Power supply The printer power supply is a combination power supply. It outputs the following voltages: n +5 VDC generated from a chopper system. +5 VDC is used for the digital logic systems. n ±12 VDC generated from a flyback converter system. ±12 VDC is supplied to the image processor board for specialized circuitry. n +25.5 VDC generated from a pulse-width-modulated (PWM) system. +25.5 VDC is used for the 24 V motors and the thermal head.
5 Theory of Operation Fusing is provided by two in-line fuses on the AC input line. Overvoltage protection for the +25.5 VDC and +5 VDC supplied is provided by a “crowbar” circuit formed by a Zener diode and an SCR. +25.5 VDC overcurrent is sensed and regulated by altering the oscillations of the pulse-width-modulator that generates the voltage. Overheating is detected by a thermostat that also shuts down the pulse-width-modulator oscillator.
Theory of Operation 5 DECcolorwriter 1000 image processor Image rendering technology The image processor board handles PostScript data sent from a host computer and transforms it into a format suitable for the print engine. The hardware/software structure that performs this function is called a graphics pipeline. The graphics pipeline is composed of five basic parts.
5 Theory of Operation n The control loop, which oversees the operation of the graphics pipeline, routes the color planes to the engine driver that transmits the color plane data to the print engine. The control loop also monitors the control and error signals fed back from the print engine. Control loop LocalTalk Serial Parallel LocalTalk handler I/O serializer PostScript interpreter Rasterizer Engine driver Print engine SCSI Ethernet Ethernet SIMM Fonts in ROM Image processor Figure 5-11.
Chapter 6 Troubleshooting This chapter discusses troubleshooting the DECcolorwriter 1000. Troubleshooting is discussed with two approaches: n A step-by-step verification procedure that systematically confirms that particular components of a printer are properly functioning until a problem is found. n A symptom/cause scheme that lists particular printer failures and error codes and their possible causes.
6 Troubleshooting The print engine is initialized. The engine fan runs continuously while the printer is on. The thermal head fan runs during printing and while the thermal head temperature is o o greater than 35 C (95 F). Print Engine Troubleshooting This topic is a step-by-step procedure for systematically verifying particular aspects of a printer's operation. Following this procedure should lead to the cause of a printer's failure.
6 Troubleshooting 2. Once the READY light is on (not blinking), press and hold the TEST button for 5 seconds. The printer should print out a test pattern. If the printer prints a test pattern, then the print engine is working correctly and the printer's problem resides with its image processor board. Refer to the later topic “Image processor self-diagnostics” on page 6-30. If the printer does not print a test pattern, then a problem exists with the print engine.
6 Troubleshooting If you do not measure DC voltages, proceed to the next step “Inspecting the power supply fuses.” If the +5 VDC and +24 VDC voltages measure correctly, but the printer does not operate correctly, then proceed to the procedure “+24 VDC safety interlocks.” Pin 28 +5 VDC 33 34 CN 2 Pin 11 +5 VDC Pin 7 P-GND Pin 12 GND Pin 8 +24 VDC 1 2 8699-20 Figure 6-1.
Troubleshooting 6 Inspecting the power supply fuses Two 5 A fuses are mounted on the power supply. 1. Refer to the Chapter 8 topic “Card cage and power supply” on page 8-35 for the procedure to follow to access the fuses. 2. Visually, and with a VOM, check to determine that the fuses are good. If the fuses are good, but the printer's power supply does not output DC voltages, proceed to the topic “Testing for a shorted motor” on page 6-6. Power supply Fuses 8699-19 Figure 6-2.
6 Troubleshooting Testing for a shorted motor 1. Reinstall the power supply removed in the previous procedure. 2. Disconnect the drum motor, the thermal head lift motor, transfer roll take-up motor and the paper-feed motor. 3. Turn on the printer again to see if it does not overload now that the motors are disconnected from the power supply. If the power supply is functional, move to the procedure “Testing motor resistances” on page 6-8.
Troubleshooting 6 If motor resistances are correct, replace the engine control board. Refer to the Chapter 8 topic “Engine control board” on page 8-39. Top cover interlock Front cover interlock 8345-21 Figure 6-3.
6 Troubleshooting Testing motor resistances Required tools #1 POSIDRIV® screwdriver VOM n n With a VOM set for measuring resistance, test each motor's windings for its correct resistance. Rotate the motor's drive shaft slightly while taking the measurement. Table 6-1.
Troubleshooting 3. 6 Ensure that the correct media is in the correct paper tray. The tray indicates the size and the type of media loaded in the tray; the printer does not directly sense the size or type of media. Paper-pick errors Paper-pick errors occur when the media in the paper tray mis-picks or the printer double-picks two sheets of paper. 1. Clean the interior of the paper tray. When installing paper, push the stack of paper down until the tray's lift-plate locks to the bottom of the tray.
6 Troubleshooting 8. Inspect the wiring harness leading to the paper-feed module for nicks, cuts or crimped wiring. 9. Inspect the paper-feed module for obstructions. Paper-clamping errors Note Figure 1-3 illustrates the location of all the printers' sensors. 1. Check hex-encoded error indicators on the front panel by momentarily pressing the TEST button. (The later topic “Displaying error codes on the front panel” on page 6-18 explains how to interpret error codes.
Troubleshooting 3. Inspect the idler rollers on the inside of the top-front cabinet panel; they should rotate freely. 4. Check that the exit roller rotates smoothly and that the front cover is fully closed and seated. 5. Check the paper eject path for obstructions. 6 Checking the paper-feed motor and drive train 1. Determine if the paper-feed motor runs. If it does not rotate, go to Step 2. If it does rotate, go to Step 5. 2.
6 Troubleshooting Media skews passing through the paper path 1. Check to see if the media is excessively curled. Curled media can get mistracked in the paper path. 2. Examine the paper path. Is there an obstacle blocking the path? 3. Check to see if the drum's paper clamp operates correctly. You should be able to open and close it smoothly and evenly. Is it clean? Paper or film can slip in a dirty clamp. Refer to the cleaning procedures in Chapter 5. 4.
Troubleshooting 6 Printing and print quality problems Required tools #1 POSIDRIV® screwdriver Volt-ohm-meter (VOM) n n Print problems fall into the following five categories: n Streaks or lines in the prints n No printing n Printing too light or too dark n Image is offset or cut off n Wrinkling Streaks or lines in the print parallel to the long axis of printing 1. Clean the thermal head. This is discussed in the Chapter 7 topic “Cleaning.” 2.
6 Troubleshooting 6. If no problems are found in the previous steps, then you can assume that the print engine control board is driving the drum motor incorrectly; replace the engine control board. White portion of print is colored 1. If the thermal head is transferring wax to the paper when it shouldn't, the thermal head is too hot. Thermal head voltage control may be bad; check the power supply thermal head voltage.
Troubleshooting 6 10. Perform the Chapter 9 procedure “Adjusting for best print quality” on page 9-14. 11. Replace the thermal head. This is explained in the Chapter 8 topic “Thermal head” on page 8-17. Not printing The printer processes a sheet of paper, but no image is printed on it. 1. Ensure that the thermal head temperature-adjust DIP switches are correctly set for the resistance of the thermal head. Refer to the Chapter 9 topic “Adjusting for best print quality” on page 9-14." 2.
6 Troubleshooting Printing too light or too dark 1. Check that a quality brand of paper is being used. In the case of coated paper, ensure that it is being placed in the tray with the printing side up. 2. Ensure that the customer is using the Plain Paper Transfer Roll for printing on plain paper. The 3-Color Transfer Roll will appear dull and washed out on plain paper. Ensure the PAPER/TRANSPARENCY switch on the side of the tray is set to the correct setting. 3.
Troubleshooting 6 Wrinkling An example of wrinkling is shown in Appendix B “Color Test Patterns.” Wrinkling occurs when the transfer roll is not maintaining smooth, even contact between the thermal head and the paper; instead, it is wrinkling and rippling. 1. Clean the thermal head. Refer to the Chapter 7 topic “Cleaning.” 2. Inspect the front idler roller. Ensure that the two sleeves are properly located on the idler roller and that they line up correctly with the drum.
6 Troubleshooting Print engine self-diagnostics Starting service mode (self-diagnostics) 1. Turn off the printer if it is not already turned off. Ensure that the printer has paper and a transfer roll installed. 2. Press and hold the TEST button and turn on the printer. Wait 1 or 2 seconds and then release the TEST button. The printer will power-up into service mode.
Troubleshooting 6 Problems and solutions Print engine error codes and their causes These are the error codes displayed in service mode and their possible causes. These codes can also be displayed in normal mode, after an error occurs, when you press the TEST button. Table 6-3. Print engine error codes and their meanings Code Meaning o o o o o o Z Hex Code 00 No error Print engine is functioning normally. o o o o o Z Z Hex Code 01 Drum position error.
6 Troubleshooting Table 6-3. Print engine error codes and their meanings (cont'd.) Code Meaning o o o Z Z o Z Hex Code 06 Strobe error. The strobe pulse driving the thermal head is too long. Turn the printer off and then on again and try making another print. If the error recurs, replace the print engine control board. Refer to the Chapter 8 topic “Engine control board” on page 8-39. o o o Z Z Z Z Hex Code 07 RAM error. Turn the printer off and on again.
Troubleshooting 6 Table 6-3. Print engine error codes and their meanings (cont'd.) Code Meaning o Z o o o o Z Hex Code 10 Transfer roll empty. Determine if the transfer roll is empty. Determine if the transfer roll is installed and is properly seated in the transfer roll holders. Check the operation of the transfer roll sensors located under the left and right ends of the supply roll. The switches are actuated by the core end of the roll.
6 Troubleshooting Table 6-3. Print engine error codes and their meanings (cont'd.) Code Meaning Z o o o Z o Z Hex Code 22 Paper-eject sensor failed to turn on. Check the paper-exit rollers for proper operation. Check for blockage at the paper-exit sensor or paper tray. Ensure that the paper-exit sensor operates correctly and is properly adjusted. Refer to the topic “Switch and interrupt sensor checks” on page 9-8. Z o o o Z Z Z Hex Code 23 Paper-pass error – lower tray.
Troubleshooting 6 Table 6-3. Print engine error codes and their meanings (cont'd.) Code Meaning Z o o Z Z o Z Hex Code 26 Clamp error. Check to see that the paper clamp is opening properly when the drum is rotated backward into the drum stops. Determine if the drum rotates smoothly to the clamp-open position. Ensure that the clamp holds media firmly; clean it. Ensure that no foreign matter interrupts the paper clamp sensor. Ensure that the bail rollers operate smoothly and correctly.
6 Troubleshooting Table 6-3. Print engine error codes and their meanings (cont'd.) Code Meaning Z o Z o Z Z Z Hex Code 2B Clamp error. Check the platen for a media jam. Clean the paper clamp. See Chapter 7 topic “Cleaning.” Check to see if media is being clamped firmly by the paper clamp. Ensure that the paper clamp operates smoothly. Ensure that the drum drive operates correctly. Check the paper clamp sensor for proper operation.
Troubleshooting 6 Macintosh printing problems Image never prints. Printer READY light flashes as if receiving data, but nothing comes out of printer or goes back to “Ready” mode without printing image. Make sure that the correct DECcolorwriter 1000 icon was selected in the Chooser. Try printing the job again. In the Chooser, switch background printing to off. Try printing the job again. Download the Error Handler utility and try printing the job again.
6 Troubleshooting PC DOS printing problems Image never prints. Printer READY light flashes as if receiving data, but nothing comes out of printer, or the printer goes back to “Ready” mode without printing image. Make sure that you are communicating with the printer. At the DOS prompt, type the following in lowercase letters: echo showpage > port: (substitute LPT1:, LPT2: or COM1, etc., for port:) The printer responds by sending a page through the print cycle and ejecting a blank page.
Troubleshooting 6 Windows printing problems Image never prints. Printer READY light flashes as if receiving data, but nothing comes out of printer or the printer goes back to “Ready” mode with out printing image. Perform the same troubleshooting ideas suggested in the previous topic “PC DOS printing problems.” Blue color on the screen is printing too purple. Many applications describe color as percentages of a video display screens primary colors red, green, and blue (RGB).
6 Troubleshooting Workstation printing problems Image never prints. Printer READY light flashes as if receiving data, but nothing comes out of the printer or the printer goes back to “Ready” mode without printing an image. 6-28 DECcolorwriter 1000 For serial or parallel printing. Ensure that the print file ends with a “CTRL-D” character. CTRL-D indicates the end-of-file which the printer responds to by closing host-to-printer communications and then processing and printing the file.
Troubleshooting 6 DECcolorwriter 1000 image processors Image processor normal operation indicators There are three indications that the print engine and its image processor are powered-up and operating normally: the front panel POWER and READY indicators are on (steady) and the rear panel STATUS light is blinking. When the printer is receiving or processing data, the front panel READY light blinks.
6 Troubleshooting Image processor self-diagnostics Image processor rear panel switches for self-testing All the image processors feature types of self-diagnostic modes. The type of self-diagnostics run depend upon the position of rear panel DIP Switches 2, 3 and 4. The switch combinations are listed here. The selected self-diagnostics begin upon power-up or after a hardware reset (DIP Switch 1 is toggled).
Troubleshooting 6 Manufacturing service test. This test setting is used for servicing and testing the printer during manufacturing. It is not intended for use in field servicing. The rear panel LED flashing in a regular one flash-per-second rate means no errors were detected and that the image processor's CPU is running.
6 Troubleshooting Resetting the DECcolorwriter 1000’s NVRAM Resetting NVRAM returns all the image processor's parameters to factory defaults except the print count (processed through the image processor) and the Adobe firmware serial number. To reset the image processor to its factory default values, follow this procedure: 1. Place the rear panel DIP Switch 4 in the on position (up). Place the rear panel DIP Switches 2 and 3 in the off position (down). 2.
Chapter 7 Cleaning and Maintenance The DECcolorwriter 1000 requires cleaning for optimum operation. Follow the printer cleaning, lubricating and inspecting procedures in this chapter for the best printer performance. Cleaning Tools and supplies required n n #1 Phillips screwdriver 600 grit sandpaper n n Lint-free cloth 90% pure isopropyl alcohol Generally, the following three steps are performed by the customer. Each time the transfer roll is replaced: 1.
7 Cleaning and Maintenance 3. Remove the paper-feed module as explained in the Section 8 topic “Paper-feed module” on page 8-5 to gain easier access to its rollers. With an alcohol-dampened cloth, clean the following: n Three black rubber feed rollers n Two alignment rollers n All sheet metal surfaces 4. Reinstall the paper-feed module. 5. With a 90% isopropyl alcohol-dampened cloth, clean the lower paper-eject rollers. 6.
Cleaning and Maintenance 7 The two clutches used in the printer look slightly different but function and are serviced in the same manner. Refer to the Section 8 topics “Paper-pick roller, clutch, and paper-empty flag” on page 8-9 and “Lower aligning roller, clutch, and paper-pass sensorþ1þflag” on page 8-11 for the procedures on removing the clutches.
7 Cleaning and Maintenance Gears: Replace gears that show any signs of wear or breakage. Look for these problems: n Thinned gear teeth. n Bent or missing gear teeth; check especially where a metal gear drives a plastic gear. n Fractured or cracked gears. Belts: Inspect the belts for wear. There are three rubber belts in the printer: a belt from the head motor to the head lift cam, a belt from the drum motor to the drum pulley, and a belt from the lower eject roller to the upper eject roller.
Chapter 8 FRU Disassembly/Assembly Required tools n Magnetic tip screwdriver — 8.5 in.
8 FRU Disassembly/Assembly Lower tray assembly The Lower Tray Assembly, sometimes referred to as the second feeder, is serviced and replaced as a unit. Its construction and operation is very similar to the paper feed unit in the print engine. 1. Turn off the printer. 2. Unplug the Lower Tray Assembly cable from the rear of the printer. 3. Lift the printer off of the Lower Tray Assembly.
FRU Disassembly/Assembly 8 Printer cabinet panels Tools required #1 POSIDRIV® screwdriver n The printer features cabinet panels. To a certain degree the cabinet panels interlock; you must remove some cabinet panels before you can remove others. You can remove the following panels anytime: n Top rear panel (two screws). n Left and right side panels (two screws each.) Slide the front cover forward and loosen the rear panel slightly before removing a side panel.
8 FRU Disassembly/Assembly Top rear panel Top access cover panel Right side panel Rear cabinet panel Top front access panel Left side panel Front access panel Front access cover panel Bottom cabinet panel Figure 8-2 8-4 Removing the cabinet panels DECcolorwriter 1000 8699-57
FRU Disassembly/Assembly 8 Paper-feed module Tools required n n n #1 POSIDRIV® screwdriver Small flat-blade screwdriver Needle-nose pliers 1. Power down the printer and remove the power cord. Remove the paper tray. 2. Remove the front access cover. Also, remove the lower front cabinet panel and the left and right side cabinet panels. Refer to the earlier topic “Printer cabinet panels” on page 8-3. 3. Disconnect the paper-feed module wiring harnesses on the left side of the printer. 4.
8 FRU Disassembly/Assembly Accessing the pick roller, aligning roller, and the lower feed roller 1. Power down the printer and remove the power cord. 2. Remove the paper-feed module as explained in the previous procedure “Paper-feed module” on page 8-5. 3. Remove the two screws securing the paper-feed circuit board to the paper-feed module. (One screw is reached through an access hole.) Slide the board out of the way.
FRU Disassembly/Assembly 4. 8 Remove the four screws securing the top half of the paper-feed module. (For reassembly, note the alignment pins in the top half and the receiving holes in the bottom half. Ensure that they properly line up during reassembly.
8 FRU Disassembly/Assembly 5. Separate the two halves and flip the upper half over to expose all the rollers. 8699-26 Figure 8-6 Separating the paper-feedþunit At this point you can proceed to any individual roller removal procedures explained on the following pages.
FRU Disassembly/Assembly 8 Paper-pick roller, clutch, and paper-empty flag You must remove the paper-pick roller and clutch prior to removing the paper-empty flag. Removing the paper-empty flag is an optional step. 1. Remove the E-ring securing the pick roller clutch. Remove the clutch. (For reassembly, note the keyed shaft the clutch fitsþonto.) 2. Remove the two E-rings securing the pick roller to the upper half of the paper-feed module. Rotate and remove the paper-pick roller.
8 FRU Disassembly/Assembly 4. Rotate and remove the paper empty flag.
FRU Disassembly/Assembly 8 Lower aligning roller, clutch, and paper-pass sensor 1 flag You must remove the lower aligning roller and clutch prior to removing the paper-pass sensor 1 flag. Removing the paper-pass sensor 1 flag is an optional step. 1. Remove the E-ring securing the aligning roller clutch. Remove the clutch. (For reassembly, note the keyed shaft the clutch fitsþonto.) 2. Remove the two E-rings securing the lower aligning roller (black rubber) to the upper half of the paper-feed module.
8 FRU Disassembly/Assembly 3. Paper-pass sensor 1 flag removal: Rotate the paper-pass sensor flag about 180o and slide it out of the paper feed unit.
FRU Disassembly/Assembly 8 Removing the upper aligning roller 1. Flip over the upper half of the paper-feed unit to access the upper aligning roller (white nylon); refer to Figure 8-6. 2. Remove the two tensioning springs holding down each end of the upper aligning roller. 3. Remove the two E-rings securing the upper aligning roller. Remove the aligning roller from the guide plate and bronze bushings.
8 FRU Disassembly/Assembly Removing the feed roller 1. If not already upright, flip over the upper half of the paper-feed unit to access the feed roller; refer to Figure 8-6. 2. Remove the two E-rings securing the feed roller. 3. Remove the white nylon gear and its pin. 4. Remove the feed roller. If necessary, remove the right end bushing to create more clearance for removing the roller.
FRU Disassembly/Assembly 8 Removing the exit rollers 1. Power down the printer and remove the power cord. 2. Open the top cover and remove the front access cover. Also, remove the top front, left and right side cabinet panels as described in “Printer cabinet panels” on page 8-3. 3. Lower exit roller: Remove the E-rings securing the lower exit roller pulley. 4. Remove the lower exit roller pulley, roller, bushings and the paper-eject belt. 5.
8 FRU Disassembly/Assembly Bail roller assembly Tools required #1 POSIDRIV® screwdriver 1. Power down the printer and remove the power cord. Open the top access cover and remove the transfer roll. 2. Remove the left and right side cabinet panels. Refer to the earlier topic “Printer cabinet panels” on page 8-3. 3. Remove the four screws securing the bail roller assembly (two at each end: one inside the frame and one outside) to the print engine frame. 4. Remove the bail roller assembly.
FRU Disassembly/Assembly 8 Thermal head Tools required #1 POSIDRIV® screwdriver 1. Power down the printer and remove the power cord. Remove the top cabinet panel. Refer to the earlier topic “Printer cabinet panels” on page 8-3. Close the top cover. 2. Remove the screws securing the thermal head fan and move the fan out of the way so that you can access the thermal head's guide pin. 3. Remove the E-ring securing the thermal head's guide pin to the thermal head frame.
8 FRU Disassembly/Assembly Reverse these steps to reinstall the thermal head, then perform the Chapter 9 procedure “Adjusting for best print quality” on page 9-14. Route the grounding strap so that it does not interfere with the thermal head lift belt.
FRU Disassembly/Assembly 8 Drum Tools required n n #1 POSIDRIV® screwdriver Small flat-blade screwdriver n n Needle-nose pliers 2 mm wrench 1. Power down the printer and remove the power cord. Open the top access cover and remove the transfer roll. 2. Remove the left and right side panels. Refer to the earlier topic “Printer cabinet panels” on page 8-3. 3. Loosen the drum belt tensioner set screw.
8 FRU Disassembly/Assembly 6. Remove the E-rings and bronze bushings from each end of the front idler roller. Remove the roller. Front idler roller Drum 6 6 8699-35 Figure 8-17 7. 8-20 Removing the front idlerþroller Remove the bail roller assembly by removing the pair of screws at each end of the assembly.
FRU Disassembly/Assembly 8. 8 Remove the E-ring securing the right end of the drum's shaft to the print engine frame. Also, remove the shaft's bronze bushing. 7 Drum Bail roller assembly 7 8 8699-36 Figure 8-18 Note Removing the drum's right end bushing During removal and replacement, be careful not to scratch or damage the drum. Defects in the surface of the drum can affect print quality.
8 FRU Disassembly/Assembly 9. Remove the drum. You will find it necessary to rotate the drum so that the paper clamp sensor flag (on the left end of the paper clamp) fits through a hole in the left-top side of the frame. This allows you to position the drum far enough to the left so that you can raise the right end of the drum and lift the drum out of the print engine. Reverse these steps to reinstall the drum.
FRU Disassembly/Assembly 8 Motors Paper-feed motor Tools required n #1 POSIDRIV® screwdriver 1. Power down the printer and remove the power cord. 2. Remove the left side cabinet panel. Refer to the earlier topic “Printer cabinet panels” on page 8-3. 3. Disconnect the wiring harness leading to the paper-feed motor. 4. Remove the two screws securing the paper-feed motor to the print engine frame. Remove the motor. Reverse these steps to reinstall the paper-feed motor.
8 FRU Disassembly/Assembly Drum motor Tools required n #1 POSIDRIV® screwdriver 1. Power down the printer and remove the power cord. 2. Remove the left side cabinet panel. Refer to the earlier topic “Printer cabinet panels” on page 8-3. 3. Loosen the drum belt tensioner set screw. Push the tensioner to loosen the drive belt and then tighten the set screw to hold the belt in its loosened position. 4. Remove the drum belt from the drum pulley. 5.
FRU Disassembly/Assembly 8 Transfer roll take-up motor Tools required n #1 POSIDRIV® screwdriver 1. Power down the printer and remove the power cord. 2. Open the top access cover and remove the transfer roll. 3. Remove the left side cabinet panel. Refer to the earlier topic “Printer cabinet panels” on page 8-3. 4. On the inside of the printer, loosen the transfer roll take-up gear's two set screws. Remove the gear.
8 FRU Disassembly/Assembly 5. On the outside of the printer, disconnect the wiring harness leading to the transfer roll take-up motor. 6. Remove the two screws securing the transfer roll take-up motor to the print engine frame. Remove the motor. Transfer roll take-up motor 6 5 8699-48 Figure 8-23 Removing the transfer roll take-up motor Reverse these steps to reinstall the transfer roll take-up motor.
FRU Disassembly/Assembly 8 Thermal head lift motor Tools required n #1 POSIDRIV® screwdriver 1. Power down the printer and remove the power cord. Remove the cabinet top. Refer to the earlier topic “Printer cabinet panels” on page 8-3. 2. Unloop the thermal head lift belt from the thermal head lift cam roller's pulley. 3. Remove the screw securing the bottom of the thermal head lift motor bracket. The transfer roll mark sensors are mounted to this bracket.
8 FRU Disassembly/Assembly 4. Slip the thermal head lift cam belt off the pulley on the end of the thermal head lift motor shaft. 5. Remove the screw securing the thermal head lift motor in place. Remove the motor with an upward twisting motion. 6. Disconnect the thermal head lift motor's wiring harness. Reverse these steps to reinstall the thermal head lift motor.
FRU Disassembly/Assembly 8 Sensors and switches The following topics explain how to remove sensors or switches that are difficult to reach, require considerable print engine disassembly, or require special cautions. Paper-pass sensor 1 and paper-empty sensor These sensors are located on the paper-feed module. The paper pass sensor 1 and the paper empty sensor are soldered on the paper-feed circuit board. The board must be replaced to replace the sensors.
8 FRU Disassembly/Assembly Paper-pass sensor 2 and tray sensor Tools required n #1 POSIDRIV® screwdriver Paper-pass sensor 2 and the paper tray sense switches are located inside the paper-feed module. You follow the same basic procedure to access either sensor. 1. Power down the printer and remove the power cord. 2. Remove the paper-feed module as explained in the previous procedure “Paper-feed module” on page 8-5. 3.
FRU Disassembly/Assembly 4. Remove the four screws securing the top half of the paper-feed module. Separate the two halves and flip over the upper half. 5. Paper-pass sensor 2: Unclip paper-pass sensor 2 and remove it and its wiring harness leading to the paper-feed circuit board.
8 FRU Disassembly/Assembly 6. Tray sensor circuit board: Disconnect the tray sensors’ wiring harness. 7. Straighten the two metal tabs securing the tray sensors’ bracket to the paper-feed module. Unhinge the bracket to access the tray sensor circuit board. 8. Remove the screw securing the paper tray sensor circuit board to the bracket. Remove the circuit board. Reverse these steps to reinstall paper-pass sensor 2 and the tray sensor circuit board.
FRU Disassembly/Assembly 8 Transfer roll low sensor Tools required n #1 POSIDRIV® screwdriver This sensor is located inside the print engine near the power supply (below the supply-side transfer roll). 1. Power down the printer and remove the power cord. 2. Open the top access cover and remove the transfer roll. 3. Remove the card cage and power supply as explained in the later topic “Card cage and power supply” on page 8-35. 4.
8 FRU Disassembly/Assembly 1. Power down the printer and remove the power cord. 2. Open the top access cover and remove the transfer roll. 3. Remove the drum as detailed in the earlier procedure “Drum” on page 8-19. 4. Disconnect the paper clamp sensor's wiring harness. 5. Remove the two screws securing the paper clamp sensor in place. Reverse these steps to reinstall the paper clamp sensor.
FRU Disassembly/Assembly 8 Card cage and power supply Tools required n #1 POSIDRIV® screwdriver 1. Power down the printer and remove the power cord. Disconnect all host interface connectors. 2. Remove the rear and side cabinet panels. Refer to the earlier topic “Printer cabinet panels” on page 8-3. 3. Disconnect all wiring harnesses from the card cage. 4. Disconnect the four screws securing the card cage to the print engine frame (two screws each on the left and the right sides).
8 FRU Disassembly/Assembly 5. Disconnect the power supply wiring harness leading to the printhead. Cut the cable ties securing the harness in place. 6. Slide the card cage and power supply out the rear of the print engine. As you slide the card cage out you can disconnect the thermal head power supply harness from the power supply. Fuses: Note the location of the power supply's fuses. Engine fan: Note that the engine fan blows into the cardþcage.
FRU Disassembly/Assembly 8 Circuit boards Power supply circuit board Tools required n #1 POSIDRIV® screwdriver Warning Unplug the power cord to remove a possible electric shock hazard. 1. Power down the printer. Unplug the power cord. 2. Remove the power supply as detailed in the previous procedure “Card cage and power supply” on page 8-35. 3. Disconnect the AC line voltage select switch's input connectors from the power supply circuit board.
8 FRU Disassembly/Assembly Reverse these steps to reinstall the power supply. After replacing the power supply, run the adjustment “Thermal head temperature adjustment” on page 9-14 to ensure that the printhead is calibrated to the new power supply.
FRU Disassembly/Assembly 8 Paper-feed circuit board The paper-feed circuit board can be removed as a part of the paper-feed module disassembly procedure. Refer to the earlier procedure “Paper-feed module” on page 8-5. Engine control board Tools required n #1 POSIDRIV® screwdriver 1. Power down the printer. Leave the power cord plugged in to provide a ground path for static discharges. 2. Remove the left side and top-rear cabinet panel. Refer to the earlier topic “Printer cabinet panels” on page 8-3.
8 FRU Disassembly/Assembly 4. Remove the card cage top (held by 3 screws). 5. Flip over the hinged card cage top. 6. Lift out the engine control board. Note If you exchanged an old engine control board for a new engine control board, be sure to exchange the NVRAM (IC 5) from the old board into the new board. The NVRAM IC contains the printhead temperature and sensor calibration setting.
FRU Disassembly/Assembly 8 Card cage interconnect board 1. Power down the printer. Leave the power cord plugged in to provide a ground path for static discharges. Remove all interface cables. 2. Remove the left side, right side and top-rear cabinet panels. Refer to the earlier topic “Printer cabinet panels” on page 8-3. 3. Remove the engine control board and the image processor board from the card cage.
8 FRU Disassembly/Assembly I/O board Tools required n #1 POSIDRIV® screwdriver 1. Power down the printer. Leave the power cord plugged in to provide a ground path for static discharges. Remove the interface cables. 2. Remove the top-rear and rear cabinet panels. Refer to the earlier topic “Printer cabinet panels” on page 8-3. 3. Remove the screws securing the I/O board to the card cage. 4. Disconnect the I/O board’s ribbon cable from the image processor board. Remove the I/O board.
FRU Disassembly/Assembly 8 Image processor board Tools required n #1 POSIDRIV® screwdriver 1. Power down the printer. Leave the power cord plugged in to provide a ground path for static discharges. Remove the interface cables. 2. Remove the top-rear and rear cabinet panels. Refer to the earlier topic “Printer cabinet panels” on page 8-3 3. Remove the card cage top (3 screws). 4. Flip over the hinged card cage top. 5.
8 FRU Disassembly/Assembly RAM SIMM Tools required n #1 POSIDRIV® screwdriver 1. Power down the printer. Leave the power cord plugged in to provide a ground path for static discharges. Remove the interface cables. 2. Remove the I/O board and the image processor board as explained in the previous procedure “I/O board” on page 8-42 and “Image processor board” on page 8-43. 3. Insert a memory module in connector J6 (a), and tilt the module upright until it locks in place (b).
FRU Disassembly/Assembly 8 Font module Tools required n #1 POSIDRIV® screwdriver 1. Power down the printer. Leave the power cord plugged in to provide a ground path for static discharges. Remove the interface cables. 2. Remove the I/O board and the image processor board as explained in the previous procedures “I/O board” on page 8-42 and “Image processor board” on page 8-43. 3. Insert the font module in connector J14 (a), and tilt the card upright until it locks in place (b).
8 FRU Disassembly/Assembly 8-46 DECcolorwriter 1000
Chapter 9 Checks and Adjustments This chapter describes how to make mechanical and electrical adjustments to the DECcolorwriter 1000 print engines. It also describes how to maximize print quality. Required tools summary n Magnetic tip screwdriver -- 8.5 ins.
9 Checks and Adjustments Printing test patterns Note Do not print test patterns using the Black Transfer Roll; many patterns will print blank. Checking and adjusting the printer often involves printing the printer's built-in test patterns. The following procedure explains how to select and print a test pattern. 1. Turn off the printer. 2. Remove the top rear cabinet panel to access the engine control board. Refer to the Chapter 8 topic “Printer cabinet panels” on page 8-3. 3.
Checks and Adjustments Table 9-1 9 Selecting self-test print patterns Dip switches 1-4 1-5 1-6 1-7 ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ Print pattern and tests Color Test Pattern 0: Speckle detect CMY Test Pattern 1: Rag patch (full step) CMY Test Pattern 2: Bridging detect (orange) MY Test Pattern 3: Composite black fill (C, M, Y) CMY Test Pattern 4: 25% fill CMY Test Pattern 5: Dither CMY Test Pattern 6: Wrinkle 1 CM Test Pattern
9 Checks and Adjustments Printer self-checks Table 9-2 summarizes using DIP Switches 1-4 through 1-7 to select self-check modes to adjust and calibrate the print engine's sensors and mechanisms. The topics following Table 9-2 explain when and how to use each check mode. The printer must be in service mode to execute self-checks. Note Turn off the printer and reenter service mode between each test. Turning Switch 1-3 on starts the selected test. Turning it off stops the test.
Checks and Adjustments 9 Thermal head motor check 1. Turn off the printer. 2. Remove the rear cabinet panel to access the engine control board. Refer to the Chapter 8 topic “Printer cabinet panels” on page 8-3. 3. Press and hold the TEST button and turn on the printer. Release the TEST button. The printer is now in service mode. 4. Set all the DIP 1 Switches off. 5. Set DIP Switch 1-3 on to start the test. LEDs ERROR and JAM blink rapidly to indicate that the test is active. 6.
9 Checks and Adjustments Paper-path check 1. Turn off the printer. Ensure that the paper tray is filled. 2. Remove the rear cabinet panel to access the engine control board. Refer to the Chapter 8 topic “Printer cabinet panels” on page 8-3. 3. Press and hold the TEST button and turn on the printer. Release the TEST button. The printer is now in service mode. 4. Set all the DIP 1 Switches off. 5. Set DIP Switches 1-6 and 1-7 on. 6. Set DIP Switch 1-3 on to start the test.
Checks and Adjustments 9. 9 LED READY will turn off if the standard tray is selected. 10. Set DIP Switch 1-3 off to exit the mode. Reflective sensor auto-calibration This procedure automatically calibrates the transfer roll mark sensors and the paper clamped sensor. These sensors can also be individually calibrated in the later procedures “Calibrating the transfer roll mark sensors (reflective sensors)” on page 9-10 and “Calibrating the paper clamp sensor (reflective sensor)” on page 9-10.
9 Checks and Adjustments Switch and interrupt sensor checks There are six switch check modes to test a total of 21 switches and interrupt sensors. The modes test the following switches: Note Figure 1-3 illustrates the locations of the print engine's sensors.
9 Checks and Adjustments 6. Set DIP Switch 1-3 on to start the test. LEDs ERROR and JAM blink rapidly to indicate the mode is active. 7. Actuate the switches corresponding to the test mode you selected. LEDs PAPER, TRANSFER ROLL, COVER, or READY blink rapidly when each switch is actuated.
9 Checks and Adjustments Calibrating the transfer roll mark sensors (reflective sensors) 1. Turn off the printer. Ensure that a 3-Color transfer roll is installed. 2. Remove the rear cabinet panel to access the engine control board. Refer to the Chapter 8 topic “Printer cabinet panels” on page 8-3. 3. Press and hold the TEST button and turn on the printer. Release the TEST button. The printer is now in service mode. 4. Set all the DIP 1 Switches off. 5. Set DIP Switches 1-4, 1-5 and 1-6 on. 6.
Checks and Adjustments 9 Drum belt tension adjustment Tools required n #1 POSIDRIV® screwdriver This adjustment should be made whenever the drum or drum belt has been removed or replaced. 1. Power down the printer. 2. Remove the left-side cabinet panel. Refer to the Chapter 8 topic “Printer cabinet panels” on page 8-3. 3. Loosen the drum belt tensioner set screw. The tensioner spring will automatically adjust the belt to the correct tension. 4.
9 Checks and Adjustments Top margin adjustment Note Top margin refers to the top edge of test prints produced by the print engine; the top edge of the test print is the edge inserted into the paper clamp. Prints made via the image processor insert the bottom edge of the print into the paper clamp. This adjustment sets how far a sheet of media is inserted into the paper clamp before it is clamped. Consequently, it also set the print's top margin by forcing printing to begin at the top of a page.
Checks and Adjustments 7. Set DIP Switches 1-5, 1-6 and 1-7 to correspond to the desired top margin adjustment. Positive numbers increase the distance the paper is inserted into the paper clamp, thereby increasing the top margin. The bottom margin will get correspondingly smaller. Conversely, negative numbers decrease the distance the paper is inserted into the paper clamp. 8. Press the TEST button to store the new value into the printer's memory. The MEDIA LED blinks when the value is stored.
9 Checks and Adjustments Adjusting for best print quality Thermal head temperature adjustment This adjustments sets the reference pulse duration for the strobe pulses that drive each thermal head element during printing. The longer the pulse duration is, the hotter the element. During printing, the engine alters the pulse duration slightly to compensate for ambient temperature, thermal head temperature, the color being printed, the history of nearby printed dots and dot density.
Checks and Adjustments 9 Use test pattern 5 to check and make the thermal head temperature adjustment.
9 Checks and Adjustments Thermal head pitch (to correct speckle and wrinkle) Tools required n n #1 POSIDRIV® screwdriver n 7/32-inch nutdriver n cement compound This adjustment corrects for speckles in the prints. This adjustment allows you to set the pitch or tilt of the thermal head's elements in relation to the drum surface as illustrated in Figure 9-3. Properly setting the pitch of the thermal head places the printing elements in optimum contact with the drum, eliminating speckles and wrinkling.
Checks and Adjustments 9 8 Pitch adjustment nut Thermal head Pitch adjustment nut Thermal head elements Drum 8699-91A Figure 9-3 Adjusting the thermal head pitch Service Manual 9-17
9 Checks and Adjustments Paper clamp adjustment (to correct misregistration) Before making this adjustment, be sure that the thermal head leaf spring (which presses against the right end of the thermal head when it's in its print position) is in good contact with the thermal head. If it isn't, bend the leaf spring until it makes good contact and keeps the thermal head from making any side-to-side motion during printing. This adjustment corrects for misregistration in the prints.
Checks and Adjustments 9 7 Paper clamp Access hole 4 6 High side mark on eccentric nut. Set it so the mark always faces toward the front of the printer.
9 Checks and Adjustments 9-20 DECcolorwriter 1000
Appendix A Field Replaceable Units List This appendix provides a list of field replaceable units for the DECcolorwriter 1000 Color Printer. Changes to the instruments are made to accommodate improved components as they become available. It is important when ordering parts to include the following information: n Component's order number. n Instrument type or number. n Instrument serial number. n Modification number, if any.
A Field Replaceable Units List Table A-1.
Field Replaceable Units List A 4 3 5 2 6 1 9 7 8 8699-76A Figure A-1.
A Field Replaceable Units List Table A-2. FRU interior parts list Figure Digital Part Number Vendor Part Number Quantity Name and description A-2-1 671-3169-00 1 CIRCUIT BD ASSY: I/O BOARD A-2-4 118-8930-00 1 FAN: POWER SUPPLY A-2-5 118-8931-00 1 FAN: THERMAL HEAD A-2-6 30-41596-08 671-1561-01 1 CIRCUIT BD ASSY: 4MB SIMM A-2-7 30-41596-07 671-2412-00 1 FONT ROM CKT. BD. ASSY.
Field Replaceable Units List Service Manual A A-5
30 14 21 18 A-6 DECcolorwriter 1000 20 8 6 1 7 6 2 3 9 10 11 4 12 23 22 15 17 13 15 Figure A-2.
Field Replaceable Units List A Table A-3. Printer accessories Figure Number .
A Field Replaceable Units List A-8 DECcolorwriter 1000
Appendix C Wiring Diagrams The tables below detail the signals carried through several of the print engine's wiring harness connectors at the print engine control board. Figure C-1 illustrates the print engine's control board connectors. Table C-1.
C Wiring Diagrams . Table C-3. Connector CN4 Pin Signal Pin Signal 1 DHED-0 8 RMK1 2 24S 9 +5 VDC 3 DHFAN-0 10 RMK2 4 24S 11 GND 5 HLFTA 12 RMK3 6 GND 13 STHR 7 HLFTB 14 no connect Table C-4. Connector CN5 Pin Signal Pin Signal 1 +5 VDC 5 LJAM-0 2 LCOV-0 6 LERR-0 3 LTROLL-0 7 LRDY-0 4 LPAP-0 8 LPWR-0 Table C-5.
Wiring Diagrams C . Table C-6. Connector CN7 Pin Signal Pin Signal 1 RHLFR 3 RHLF 2 GND Table C-7.
C Wiring Diagrams Thermal head . . CN8 2 Core sensor, left CN4 . . . . . . . . CN5 Front panel . . . . . . . 2 18 Thermal head lift motor . . . . . . . 14 Thermal head fan CN6 13 Thermal head position sensor . . . . . . . . Transfer roll mark sensor 13 Drum-homeposition sensor Paper-feed circuit board . . . . . . CN3 Drum motor . . . . . . . . . . . . . . . . . . 2 1 Paper-feed motor . . . . . . . . . . . . . . . . . . CN2 Paper-clamp sensor CN7 Core sensor, right . . .
C Wiring Diagrams Thermal head fan Thermal head lift motor CN4 Image processor Thermal head position sensor board Test switch Engine control board Interconnect board Drum motor CN3 CN8 Engine fan CN7 Transfer roll mark sensor Core sensor, left Drum-homeposition sensor Transfer-rolllow sensor Paper clamp sensor CN2 Power supply Core sensor, right Paper feed motor CN1 Paper pass-1 Paper-feed circuit board Paper-empty sensor Transfer roll feed motor Thermal head Paper-eject sensor Fron
C Wiring Diagrams C-6 DECcolorwriter 1000
Appendix D Test Pattern Generator The Test Pattern Generator allows you to test a printer as if it was receiving a file from a host computer. In the case of the DECcolorwriter 1000, the PostScript script causes the printer's image processor to forward a command to the print engine which generates and prints the test pattern. Note The Test Pattern Generator is NOT AVAILABLE in the field and was only used for engineering development. It has been shown here as a reference only.
D Test Pattern Generator To use the Test Pattern Generator, do the following: 1. Select a test pattern to be printed using the Test Pattern Generator's five DIP switches. The following tables lists the available test patterns. 2. Plug the Test Pattern Generator onto the printer's parallel port. You do not have to turn the printer off; you can plug-in the Test Pattern Generator “hot.
Test Pattern Generator 3. Press the Test Pattern Generator's START button. Its green LED flashes as you press the button. 4. The printer will print the transmitted print file. D Besides print files, the test pattern generator also allows you to turn off and on the printer's startup page. Table D-1.
D Test Pattern Generator D-4 DECcolorwriter 1000
Index A adjusting for best print quality 9-14 adjusting thermal head temperature 9-14 Adobe PostScript Level 2 1-2 B bail roller assembly removing 8-16 belts inspecting 7-4 C cabinet panels removing 8-3 card cage removing 8-35 checking 6-19 circuit boards removing 8-37 cleaning customer-performed 7-1 service-performed 7-1 clearances 1-12 installation 2-3 clutches inspecting 7-4 Color prints unevenly 6-14 color test patterns interpreting B-1 communication parameters 2-8 connectors rear panel 1-8 correcting
G gears inspecting 7-4 grease assembly 8-1 using 7-2 H hard error 1-8 health LED 1-8 heat controller 5-7 Hewlett Packard-Graphics Language (HP-GL) 1-2 I image data 5-5 Image is offset or cut off 6-16 image processor troubleshooting 6-29 image processor board description 1-7 removing 8-43 theory 5-17 inspecting the printer 7-3 interface cables, required 2-3 internal test pattern generator 5-8 K key operator training 4-1 L LED error codes 1-11 lower and upper exit rollers theory 5-14 Lower Tray Assembly r
print process 5-8, 5-12 print quality troubleshooting 6-13 print unloading theory 5-14 printcap, configuring a workstation 2-22 print-eject jams troubleshooting 6-11 printer assembly locations 1-3 inspecting 7-3 lubricating 7-2 self-checks 9-4 theory of operation 5-1 troubleshooting 6-1 printer clearances 1-12 printer dimensions 1-12 printer page description file 3-2 printing PC 3-3 printing process 5-2 printing test patterns 9-2 printing to a Macintosh 3-1 printing to a workstation 3-7 R RAM SIMM installi
theory 5-11 transfer roll jam troubleshooting 6-12 Transmission Retry, Windows 2-15 tray sensors 1-6 troubleshooting 6-1 V verification self-test 6-30 W White portion of print is colored 6-14 Windows 3.1 driver verification 3-4 Windows 3.
