Page 1 P H A S E R ® 8 4 0 a N D 8 5 0 C O L O R P R I N T E R S S e rv ic e Man u a l Warning The following servicing instructions are for use by qualified service personnel only.
Page 2 User safety summary Terms in manual CAUTION Conditions that can result in damage to the product. WARNING Conditions that can result in personal injury or loss of life. Power source: For 110 VAC printers, Do not apply more than 130 volts RMS between the supply conductors or between either supply conductor and ground.
Page 3 Symbols as marked on product: DANGER high voltage: Protective ground (earth) terminal: Use caution. Refer to the manual(s) for information: WARNING: If the product loses the ground connection, usage of knobs and controls (and other conductive parts) can cause an electrical shock. Electrical product may be hazardous if misused.
Page 4: Table Of Contents
Print engine assemblies Combination sensors and their meanings Media tray type sensing The main board Front panel Rear panel Phaser 840 and Phaser 850 printer differences Specifications Regulatory specifications Error Codes and Messages Rear panel LED error codes Error messages...
Page 5 Evaluating the printhead and cap/wipe/purge system Troubleshooting following cap/wipe/purge installation Macintosh printing problems Image never prints Image is rotated 90 degrees Image prints in black-and-white Printer isn’t in the Chooser Windows printing problems Image never prints Phaser 840 and 850 Color Printers...
Page 6 Locking the printhead Adjustments Process belt tension adjustment Exit roller drive belt tension adjustment Y-axis belts tension adjustment (Phaser 840 printer) Y-axis belts tension adjustment (Phaser 850 printer) Printhead-to-drum spacing adjustment (Phaser 840 printer) X-axis scale adjustment Cap/wipe/purge assembly belt adjustments...
Page 7 Power supply Power control board Upper feed roller assembly Paper/drum heater Drum/transfix assembly Drum position sensor assembly (Phaser 840 printer) Drum position sensor assembly (Phaser 850) Printhead X-axis motor and drive assembly Y-axis belt drive assembly (Phaser 840 printer) Y-axis belt drive assembly (Phaser 850 printer)
Page 8 Sensors and switches on the left side of the printer 14 Solenoids and clutches on the print engine 15 Features of the Phaser 840 printer main board 18 Features of the Phaser 850 printer main board 18 Printer front panel 19...
Page 9 Removing the drum/transfix assembly (right side) 136 Marking the drum home flag sensor alignment 138 Removing the drum position sensor assembly (Phaser 840 printer) 139 Marking the shaft for drum home alignment 140 Removing the drum position sensor assembly (Phaser 850 printer) 141...
Page 10 Tables Installed RAM and printer capabilities 6 Tray switch sensor combinations 16 Rear panel DIP switch settings 21 Summary of differences between Phaser 840 and Phaser 850 23 Physical dimensions 24 Printer installation clearances 24 Functional specifications 25 Electrical specifications 26...
Page 11 Phaser 840 and 850 Color Printers...
Page 12: General Information
General Information This service guide contains information useful to verify operation, troubleshoot, repair, adjust, and maintain the Tektronix Phaser® 840 and Phaser® 850 Color Printers. This guide includes a Field Replacement Unit list. Topics such as printer theory of operation, detailed removal/replacement procedures, conﬁguration page details, and verifying printer operation are...
Page 13: Phaser 840 Printer Overview
Phaser 840 printer overview The Phaser 840 Color Printer is an Adobe PostScript Level 3 (Version 3010) color, solid-ink printer. It also supports color PCL 5C at 600 x 600 dots-per-inch resolution. The Phaser 840 printer prints at a number of resolutions: A 10 page- per-minute (ppm) Fast Color Mode, a standard 5.7 ppm mode, an Enhanced...
Page 14 A 133-MHz PowerPC processor oversees print engine operations and PostScript image processing. The printer features an integral bi-directional parallel port (IEEE 1284C with ECP mode) and a 10BaseT Ethernet port (with support for EtherTalk, Novell NetWare/NDS, TCP/IP, DHCP and Windows Peer-to-Peer). A USB high-speed serial port is also provided.
Page 15: Phaser 850 Printer Overview
128 Mbytes of RAM. It also includes a High-capacity Paper Tray and an internal IDE hard drive. Like the Phaser 840 printer, all printers support four available paper trays. They also support the optional 500-sheet High-capacity Paper Tray Assembly. The printer can also print seven sizes of handfed envelopes.
Page 16: Solid Inks
Maximum of 2.8 cm (1.1 in.) in height (Phaser 840 printer only). SDRAM DIMMs from other Phaser printers, such as the Phaser 740 and Phaser 780 color printers may be too tall to ﬁt inside a Phaser 840 printer. Upon power-up, the image processor interrogates the 256-byte Serial Presence Detect EEROM, which describes the DIMM in great detail, such as data width, clock delay, number of address columns and row, refresh rate and more.
Page 17: Memory Considerations
(which gives greater printing throughput). The printer’s capabilities can be increase as detailed in the following table. For the Phaser 840 printer, adding RAM memory, and installing the SCSI daughter card enables the Plus and Extended conﬁgurations features.
Page 18 64 Mbytes Mem slot 1: SDRAM/parity/64 MB/KMM366S823BTL-G0 Mem slot 2: empty This is a list of SDRAM DIMMs that are branded for use by Tektronix in this printer at the time this guide was published: Size Maker Part Number Printer...
Page 19: Print Engine Assemblies
Print engine assemblies Ink load Cap/wipe/purge assembly Printhead assembly Drum Transfix roller Process motor Paper/ drum heater X-axis drive Y-axis and motor motor Paper feed motor 0388-02 Internal features of the print engine Phaser 840 and 850 Color Printers...
Page 20: Circuit Boards Of The Print Engine (Right Front View)
Seven circuit boards support the printer’s electronics. Two boards, called I/ O boards (left and right), support the front panel, solenoids and sensors. The main board contains the printer’s CPU processor, RAM and ROM. The power control board distributes power supply voltages to the other printer boards and many of the printer motors.
Page 21: Circuit Boards Of The Print Engine (Left-Rear View)
Printhead drive board Internal hard drive Drum Maintenance counter EEPROM Network card Power control board Power supply I/O board left Main board 0388-04 Circuit boards of the print engine (left-rear view) Phaser 840 and 850 Color Printers...
Page 22: The Printer's I 2 C Bus
An internal data bus, called the I C bus, connects all I/O boards to the main board. Through this single bus, the main board can “poll” the I/O boards for the state of the printer’s sensors as well as actuate the printer’s solenoids. This data bus greatly simpliﬁes the wiring that would otherwise be required for monitoring numerous sensors and solenoids.
Page 23: Printhead Maintenance System Of The Print Engine
The system consists of a vacuum pump assembly, the cap/wipe/purge assembly and the cap/wipe/ purge carriage drive. Cap/wipe/purge carriage drive Vacuum pump assembly Cap/wipe/purge assembly 0388-06 Printhead maintenance system of the print engine Phaser 840 and 850 Color Printers...
Page 24: Sensors And Switches On The Right Side Of The Print Engine
Note Unlike the Phaser 840 printer, the Phaser 850 printer does not have a separate drum-home position sensor. Ink-stick-...
Page 25: Sensors And Switches On The Left Side Of The Printer
Drum encoder Preheater sensor exit sensor Process gear position sensor Transfix roller Preheater exit sensor Preheater located on inside wall of drum/transfix frame Drum 0388-34 Sensors and switches on the left side of the printer Phaser 840 and 850 Color Printers...
Page 26: Solenoids And Clutches On The Print Engine
Caution The actual position of some printer assemblies, such as the printhead or the cap/wipe/purge assembly, cannot be ascertained at all times. The printer records, in NVRAM, where it last positioned such assemblies each time it moves them. If, after power-down or a power interruption, the assemblies are manually repositioned, the printer erroneously assumes that the assemblies are in the position it last left them.
Page 27: Combination Sensors And Their Meanings
Open Closed Open Closed Bottom switch Open Open Closed Closed The slide switch actuators on the media trays will open a switch in the forward position and close a switch in the rear position Phaser 840 and 850 Color Printers...
Page 28: The Main Board
Network connection is provided through a built-in 10BaseT port in the Phaser 840 printer and a 10/100BaseT port for the Phaser 850 printer. For the Phaser 840 printer, a plug-in SCSI interface adapter board provides a SCSI port for an external hard drive or scanner.
Page 29: Features Of The Phaser 840 Printer Main Board
SCSI riser Printer ID board NV RAM/ Real Time Clock Code ROM DIMM 0388-09 Features of the Phaser 840 printer main board RAM DIMMs EEPROM Printer ID Code ROM module 0388-76 Features of the Phaser 850 printer main board Phaser 840 and 850 Color Printers...
Page 30: Front Panel
Front panel These front panel features are found on the printer: 128 x 64 pixel backlighted graphic display Two push buttons and four arrow buttons Two LEDs LCD. The backlighted LCD serves two purposes: displaying current image processor and print engine status information and displaying an interactive menu.
Page 31: Rear Panel
Rear panel Phaser 840 printer connectors The rear panel of the Phaser 840 printer features the host interface connectors to the printer: Standard parallel (high-density connector), IEEE 1284C. For the Phaser 850 printer, it can be used to connect a parallel-interface scanner.
Page 32: Rear Panel Dip Switch Settings
Health LEDs Two health LEDs indicate the status of the printer’s CPU functions: PostScript processing and print engine control. Blinking: The printer is operating normally. Both LEDs blink irregularly during diagnostics. If a soft error occurs, image processing occurs, but in a reduced capacity. Soft failures include failure of expansion memory DIMMs or any of the interface ports.
Page 33: Phaser 840 Printer Rear Panel
Service RS-232 switches 0388-11 Phaser 840 printer rear panel IDE hard drive Optional Token Ring card PostScript Engine health health light light Ethernet 10/100BaseT Parallel Service switches RS-232 0388-77 Phaser 850 printer rear panel Phaser 840 and 850 Color Printers...
Page 34: Phaser 840 And Phaser 850 Printer Differences
+5v and +40v Hi-capacity Paper Tray leads. No x- axis fuse. RAM DIMMs Unlike the Phaser 840 printer, the Phaser 850 printer is not as restricted on the height of the RAM DIMMs the main board will accept since it uses angled RAM DIMM connectors.
Page 35: Specifications
Unrestricted to replace trays and clear paper jams Rear: 10.2 cm (4 ins.) Bottom: No obstruction under printer that could block its cooling vents. Mounting surface Within 3 degrees of horizontal with all four feet in contact with ﬂatness: the surface. Phaser 840 and 850 Color Printers...
Page 36 Addressability Phaser 840 printer: Selectable 273 x 300, 409 x 409, 491 x 982 or 600 x 1200 dots-per-inch (horizontal and vertical). Phaser 850 printer: Selectable 177 x 409, 355 x 464, 450 x 818 or 600 x 1200 dots-per-inch (horizontal and vertical).
Page 37 EN61000-4-3:1995-02 RF Field Immunity EN61000-4-2:1995-01 ESD (Electostatic Discharge) EN61000-4-4:1995-01 Fast Burst Transient EN61000-4-5:1995-02 Line Surge EN61000-4-6:1996-03 RF conducted Immunity EN61000-4-11:1994-06 Voltage Dips and Interruptions EN61000-3-3:1994-12 Flicker 73/23/EEC Low Voltage Directive 89/336/EEC Electromagnetic Compatibility Directive 89/392/EEC Machinery Directive Phaser 840 and 850 Color Printers...
Page 38 Environmental speciﬁcations Characteristic Speciﬁcation Temperature ° ° Operating to 32 C (50 to 90 ° ° Storage and to 60 C (-22 to 140 shipping Humidity Operating 10 to 80% relative humidity, non-condensing Non-operating 10 to 95% relative humidity, non-condensing Altitude °...
Page 39: Regulatory Specifications
The packaged product meets National Safe Transit Committee Test Procedures Listed: UL 1950 Information Technology Equipment Certiﬁed to: CSA C22.2 No. 950 Safety of Information Technology Equipment, Including Electrical Business Equipment GS licensed: IEC 950 (1991) Second Edition; EN60950 Information Technology Equipment Phaser 840 and 850 Color Printers...
Page 40: Error Codes And Messages
Error Codes and Messages Rear panel LED error codes The rear panel LEDs are located on each side of the rear panel DIP switches. The left LED represents the operation of the PostScript ﬁrmware. The right LED represents operation of the main board’s print engine ﬁrmware. During the POST tests, the two LEDs toggle back and forth for each successful pass through each SDRAM test.
Page 41 NVRAM. EEPROM This test reads in the ﬁrst 24 bytes from the EEPROM then veriﬁes that the Tektronix Ethernet address 0x08, 0x00, and 0x11 has been copied into three locations. Mariner ASIC This test reads and veriﬁes the version level of the Mariner ASIC.
Page 42 2L+1S=11 none 10baseT This test veriﬁes the functionality of the Ethernet (Phaser 840 LAN Controller chip. Any test failures with this only) component are treated as non-fatal errors with the error information written to the start page. If a failure is detected, the message “Ethernet:”...
Page 43: Error Messages
CAM_BEGIN down, oil roller down, the drum-maintenance cam-home sensor should have been TRUE and was instead FALSE. Check the drum maintenance cam solenoid, clutch, home sensor, and related hardware. Phaser 840 and 850 Color Printers...
Page 44 Table 4 Front panel and fault history log error codes and messages Error code Meaning 4,010.40 During the drum maintenance cycle, when the drum PC_DEV_FAULT_DM_ maintenance cam position should have been at blade CAM_BU_WU up/oil roller up, the drum-maintenance cam-home sensor should have been FALSE and was instead TRUE.
Page 45 C/W/P assembly, poorly locking pin? tension installed ink loader Measure the resistance of the x-axis motor Resistance Replace the x-axis approximately motor 12.5 Ohms? Replace the power control board 0388-82 Phaser 840 and 850 Color Printers...
Page 46 Table 4 Front panel and fault history log error codes and messages Error code Meaning 4,014.44 Calibration Failure: Deﬁned but not used. PC_DEV_FAULT_6x6DP I_CAL 4,015.45 The engine spent over 20 minutes in the printhead PC_DEV_FAULT_HEAD adjust-state. The engine declares a device fault and shuts _ADJUST_TIMEOUT down, rather than leave a hot heater against a cold drum for an indeﬁnite period.
Page 47 Drum-home sensor failure. The drum has turned a full YA_HOME_FAIL revolution without seeing the drum-home sensor activate. Check the Y-axis encoder and I/O Left board. Note: The Phaser 840 has a separate drum-home sensor. The Phaser 850 printer’s home sensor is part of the drum-position sensor. 5,002.42: Y-axis position failure.
Page 48 Table 4 Front panel and fault history log error codes and messages Error code Meaning 7,004.46: The drum-maintenance cam sensor did not see the PM_FAULT_DM_CAM_ sensor’s interrupt ﬂag as expected. The sensor may be SENSOR_BAD failing or the drum-maintenance cam may be jammed. 7,004.46 Maintenance blade position sensor (right I/O board) failed...
Page 49 Resistance Replace paper assembly move or reseat belt approximately path motor at all? 2 Ohms? Is C/W/P Replace power Replace or home sensor flag control board reseat flag functional? Replace I/O right board 0388-84 Phaser 840 and 850 Color Printers...
Page 50 Table 4 Front panel and fault history log error codes and messages Error code Meaning 9,000: Ink loader: ink melters and printhead ink-level sensors. 9,001.45: Malfunction of the ink-level sensor in the cyan reservoir. IL_FAULT_C_ Replace the printhead. TWANGER 9,002.46: Malfunction of the ink-level sensor in the magenta IL_FAULT_M_ reservoir.
Page 51 NOW! Check the printhead cabling. Replace the printhead. 13,036.48: The reservoir heater is not heating at all, or is not heating TCH_RESERVOIR_ as quickly as it should. Check the printhead cabling. SLOW Replace the printhead. Phaser 840 and 850 Color Printers...
Page 52 Table 4 Front panel and fault history log error codes and messages Error code Meaning 15,000: Drum thermals. Drum thermal faults are determined by a thermistor in contact with the drum surface. Ensure that there is adequate clearance for airﬂow (at least 4 inches (10 cms.) on all sides) and that the room temperature is between 90 C) and 50 F (10...
Page 53 VE_DM CYCLE_DONE out of order occurred VE_TF_ROLLER_LIFTED out of order 0 = event. An Unknown reason unexpected event occurred 1 - timeout. Time expired without the expected event occurring C indicates checksum Phaser 840 and 850 Color Printers...
Page 54 There is a shortcut to get the fault code while the printer is reporting a jam: For the Phaser 840 printer: Pull the paper tray out about 1 inch (2.5 cms.). This activates all three tray sensors.
Page 55 22,303.03 Unexpected Lower tray present sensor event in Lower Feeder 1 with media in the main tray *** Same as 22,101.06 *** 22,305.05 Unexpected standard tray sensor event with media in the main tray *** Same as 22,105.01 *** Phaser 840 and 850 Color Printers...
Page 56 Error code Additional clues Probable cause Action 22,306.15 Time-out of pick ﬂag on main tray with media picked from the main tray 1. Last sheet in tray a. Stuck on media grip a. Fill tray (more likely with heavier media) 2.
Page 57 Last sheet in tray b. Reload media more carefully c. Reﬁll tray(s) 6. Media really skewed with a. Problem with pick-guide a. Make sure pick guide is side edge damage assembly snapped into the printer's frame Phaser 840 and 850 Color Printers...
Page 58 Error code Additional clues Probable cause Action 22,511.02 Unexpected right-width sensor (A/A4 sensor) event 1. Media stops just inside a. A4-width media in A-size a. Check media and preheat entry rollers tray replace with good media; verify tray-type plug position 2.
Page 59 22,638.14 Time-out on preheat-exit sensor (duplex) with media in exit cover 1. More than one sheet of a. Media was pulled from a. Empty exit paper in path exit into duplex while b. Run again printing a. Multiple pick Phaser 840 and 850 Color Printers...
Page 60 Error code Additional clues Probable cause Action 2. Skew a. Last sheet in tray a. Reﬁll tray(s) b. First sheet in tray b. Make sure tray(s) is c. Failure of deskew loaded properly and system media is square in tray c.
Page 61 Run stiffer long-grained media 22,705.07 Time-out on exit sensor 1. Exit tray nearly full a. Media was pulled from a. Empty exit tray exit into duplex while printing, exit ﬂag can't move properly Phaser 840 and 850 Color Printers...
Page 62 Error code Additional clues Probable cause Action 2. Media unable to get out a. Top cover has exit ﬂag a. Remove and replace of exit trapped top cover without b. Exit ﬂag bound up capturing exit ﬂag b. Replace exit cover 3.
Page 63 Reassemble stripper release guide do not move b. E-ring missing ﬁngers or rapid release freely c. Parts bound up guide b. Reassemble stripper ﬁngers or rapid release guide c. Reassemble stripper ﬁngers or release guide Phaser 840 and 850 Color Printers...
Page 64 Error code Additional clues Probable cause Action 8. Media jammed on or a. Preheat sensor not a. Conﬁrm bracket is completely under stripper seated properly properly screwed down ﬁngers or rapid release b. Preheat sensor not onto load frame guide - margin too large or properly assembled to b.
Page 65 Phaser 840 and 850 Color Printers...
Page 66: Troubleshooting
Select button. Fast time to ready Turn the printer on. When the Tektronix logo appears on the display, press and release the left arrow, then press and release the right arrow. The printer behaves the same as if it normally powered-up and is in its Ready state except no ink is jetted.
Page 67: Network Event Logs (Phaser 850)
The logs lists events chronologically. The log is limited in length; logging stops when the log is full. The log is stored in RAM only so new data is stored each time the printer’s power is cycled. Phaser 840 and 850 Color Printers...
Page 68: System Power-Up Sequence
If an error is detected, the Phaser 850 printer ﬂashes the front panel Error LED with a repeating error code pattern as well as the rear panel PS LED. On the Phaser 840 printer, the pattern is displayed only on the rear panel PS LED (left side of the DIP switches).
Page 69 The front panel indicates the printer is in a clean cycle. A cleaning page is printed (Phaser 840 printer only). The temperature of the printhead, drum and paper preheater are allowed to stabilize at their operating temperatures and ink is melted if needed.
Page 70: No Lights, No Sound On Power-Up
During the POST tests, the two LEDs toggle back and forth for each successful pass through each DRAM test. A failure in the power on self tests is indicated by the Phaser 840 printer’s left rear panel LED (the PS LED) ﬂashing in a speciﬁc pattern of long and/or short ﬂashes and repeated indeﬁnitely.
Page 71: Verifying Power Supply Operation
Proceed to the step, “Inspecting the power supply fuses” below. If a heater shorts, F2 or F3 opens. The power supply does NOT shut down, however, a Service Required error code is displayed on the front panel. Phaser 840 and 850 Color Printers...
Page 72: Inspecting The Power Supply Fuses
Inspecting the power supply fuses Three fuses (F1 - F3) are mounted on the power supply. Turn off the printer and remove the power cord. Remove the screws securing the power supply. Disconnect the wiring harnesses plugged into the right side of the power supply and remove power supply.
Page 73: Testing For Shorted Drivers
(This isolates the I/O boards and their solenoid drivers.) If the rear-panel LEDs illuminate, isolate which I/O board is shorting or which I C cable is defective. If the power supply still does not work, replace the power supply. Phaser 840 and 850 Color Printers...
Page 74: Testing For A Shorted Motor
With a DMM set for measuring resistance, test each motor's windings for correct resistance (disconnected from the printer). Rotate the motor's drive shaft slightly while taking the measurement. Table 5 Motor and solenoid resistances Motor or solenoid Phaser 840 printer Phaser 850 printer Resistance (approximately) Resistance (approximately) Process motor 2.9 ohms +/-15% (Difﬁcult to...
Page 75: Media Jams And The Paper Path
This prevents the top sheet of paper from being mis-positioned as the tray is inserted in the printer. Hi-Capacity Paper Tray Assembly. Ensure the pick roller is installed correctly. (It can inadvertently be installed backwards.) Phaser 840 and 850 Color Printers...
Page 76: Print Transfer Jams
Check that the pick roller is being rotated. In its starting position, the pick roller’s ﬂat side should face down; the ﬂat, keyed end on the left end of the pick-roller shaft faces up. If it is not facing up, go to the topic “Checking the process motor and drive train”...
Page 77: Checking The Process Motor And Drive Train
Ensure that none are bent, damaged, or missing. The printer should be installed on a ﬂat, level surface. Ensure the pick guide assembly is properly snapped into the front of the printer frame. Phaser 840 and 850 Color Printers...
Page 78: Printing And Print Quality Problems
Printing and print quality problems Generally, print problems fall into the following six categories: Streaks or lines in the prints No printing Printing too light or too dark Poor quality printing Image is offset or cut off Wrinkling Not printing The printer processes a sheet of paper, but no image is printed on it.
Page 79: Missing Ink Or Light Colored Ink Band Running Length Of Print
Perform the procedure, “Printhead- to-drum spacing adjustment (Phaser 840 printer)” on page 102 and “Transﬁx roller pressure spring 0388-45 adjustment” on page 110. Replace the printhead. Phaser 840 and 850 Color Printers...
Page 80: Streaks Or Lines Down The Print
Streaks or lines down the print There are several possible causes of streaks running down the length of a print. Clean the blade of the drum maintenance drawer. Inspect the wiper blade of the drum maintenance kit; replace the maintenance kit, if necessary. Clean the stripper ﬁngers or rapid release guide.
Page 81: Scratches Parallel To The Long Axis Of Printing, Particularly With Film
Try a different color correction setting. Perform the procedure, “Printhead-to-drum spacing adjustment (Phaser 840 printer)” on page 102. Verify that the printhead setting “Head Adjust,” in the hidden service menu is set to 128.
Page 82: White Portion Of Print Is Colored
White portion of print is colored Color on a print where no color should be printed is often called a latent image. A latent image remains on the drum when it should have been transferred to its sheet of paper. An insufﬁcient amount of oil on the drum, provided by a dirty or defective or old maintenance drawer may be the...
Page 83: Fuzzy Text
Is the drum-maintenance cam roller and electric clutch operating correctly? Test them using PC-based diagnostics. Ensure the left and right drum-maintenance actuators operate correctly when lifted by the cams of the drum-maintenance cam roller. Phaser 840 and 850 Color Printers...
Page 84: Poor Primary Color Fills
Head-to-drum gap is too small. Verify the gap with the adjustment explained in the topic “Printhead- to-drum spacing adjustment (Phaser 840 printer)” on page 102. Verify the paper preheater temperature using PC-based diagnostics. Refer to the topic “Evaluating...
Page 85: Poor Small Text Resolution
Test them using PC- based diagnostics. Ensure the left and right drum maintenance actuators operate correctly when lifted by the cams of the drum maintenance cam roller. 0388-50 Phaser 840 and 850 Color Printers...
Page 86: Oil Streaks On Print
Oil streaks on print Oil stains the edge of the print. Are the drum maintenance cam roller and electric clutch operating correctly? Test them using PC- based diagnostics. Inspect the drum maintenance drawer. Is the wiper blade damaged? If necessary, replace the drum maintenance drawer.
Page 87 Ensure the drum temperature sensor is properly positioned and has no contamination between it and the drum surface. Verify the paper preheater temperature using PC-based diagnostics. Try a different paper, if a specialty coated paper is being used. Phaser 840 and 850 Color Printers...
Page 88: Ink Smears On First Side Of Duplex Print
Ink smears on ﬁrst side of duplex print Preheater temperature is too high. Verify the paper preheater temperature using PC-based diagnostics. Replace the paper preheater, if necessary. 0388-73 Repeating print defects on print The distance between each artifact of a repeating image defect reveals which imaging component is causing the defect.
Page 89: Banding Parallel To Long Edge Of Print
Inspect the maintenance drawer wiper blade. Replace the maintenance drawer, if necessary. The transﬁx spring pressure is incorrect. Perform the procedure 0388-74 “Transﬁx roller pressure spring adjustment” on page 110. Replace the drum/transﬁx assembly. Phaser 840 and 850 Color Printers...
Page 90: Image Is Offset Or Cut Off
Try a different paper, if a specialty coated paper is being used. Tektronix transparency ﬁlm provides the best ink adhesion versus off- the-shelf transparency ﬁlm. The transﬁx spring pressure is incorrect. Perform the procedure “Transﬁx roller pressure spring adjustment”...
Page 91: Evaluating The Printhead And Cap/Wipe/Purge System
(such as a cable rubbing the printhead). 3. Visually check printhead faceplate. Closely examine the printhead's faceplate to help evaluate whether the cap/wipe/purge assembly’s wiper blade and gasket are damaged. Faceplate showing blade wipe with no drops, smudges or streaks Phaser 840 and 850 Color Printers...
Page 92: Faceplate Showing Streaks And Smudges From A Poor Wipe
If you see spattered ink on the edges of the printhead, the cap/wipe/purge assembly’s gasket may be leaking during the purge cycle. A misaligned printhead or a defective gasket may cause this. To verify the printhead alignment, move the cap/wipe/purge assembly to its purge position and tilt the printhead forward until the upper edge of the gasket touches the faceplate.
Page 93: Connecting The Vacuum Gauge To The Printer
Simply listening for the “kiss” sound at the end of a purge cycle as the printhead separates from the cap/wipe/ purge assembly gasket is not enough to verify the vacuum system’s performance. Phaser 840 and 850 Color Printers...
Page 94 Perform the front panel Clean cycle Eliminate Light Stripes and check the PEAK vacuum and DECAY time to determine if there is a problem with the vacuum system (pump, solenoid valve or tubing) or cap/wipe/purge assembly gasket. Normal operation. In normal operation, the vacuum builds up a inside the vacuum module.
Page 95: Maintenance Tray Showing Good Purge
If the vacuum system suffered from low vacuum, either caused by a poorly-sealed gasket, a failing vacuum pump or a clogged vacuum tube, then you will see signiﬁcantly less waste ink in the waste tray. Phaser 840 and 850 Color Printers...
Page 96: Troubleshooting Following Cap/Wipe/Purge Installation
Troubleshooting following cap/wipe/purge installation After installing a new cap/wipe/purge assembly, up to 6 front panel-initiated clean cycles may be required before the cap/wipe/purge assembly gasket seals properly. Be sure to verify the new cap/wipe/purge assembly performance by completing the vacuum and decay time checks discussed earlier. Test for print quality.
Page 97: Damaged Printhead Data Cable
13,001.40 and 13,017.47: An open left and right jet stack thermistor. Reseat or replace the gray data cable. If the error reoccurs, replace printhead. If the new printhead gives the same error, replace the power control board. Phaser 840 and 850 Color Printers...
Page 98: Inadvertently Disconnected Thermistor Cable Connector
13,002.41 and 13,018.48: A jet stack thermistor appears to be shorted. Reseat or replace the gray data cable. If the error reoccurs, replace the printhead. If the new printhead gives same error, replace the power control board. 13,033.45 error: the thermistor in the reservoir appears to be open. If the 4-pin connector on the top of the driver board is disconnected, this error will occur.
Page 99: Macintosh Printing Problems
In the Print dialog box, make sure that the Color/Grayscale option has been selected. Make sure that the Phaser 840 or 850 printer icon was selected in the Chooser. Try printing the job again. Check the version of your LaserWriter driver to ensure that it is version 8.0.x or higher.
Page 100: Printer Isn't In The Chooser
Printer isn’t in the Chooser Ensure that the printer is turned on and the rear panel health light is ﬂashing at a regular rate. Check the Network or AppleTalk control panel to ensure the proper network or zone is selected. Power-cycle the printer.
Page 101 Phaser 840 and 850 Color Printers...
Page 102: Adjustments
Ensure Switches 1, 3 and 4 are up. (Normal operation is all switches up.) Turn on the printer. The printer will not print a Cleaning Page (Phaser 840 printer) nor a Startup Page when placed in Bypass Mode. Cool down mode The printer features a menu item that accelerates the cooling down of the printhead.
Page 103: Bypassing A "Short Menu
The Conﬁguration Page shows a great deal of information regarding the data and set-up values stored in NVRAM. Refer to the topic, “Conﬁguration Page” on the Color Printer Service & Support Resources CD-ROM for an explanation of the Conﬁguration Page. Phaser 840 and 850 Color Printers...
Page 104: Hidden Service Menu
To access the hidden service menu: Scroll to the Troubleshooting menu and press Select. Press and hold the left arrow button. While holding the left arrow button; press Select. Hidden Service Menu Troubleshooting (Phaser 840) Troubleshooting (Phaser 850) Previous Menu Previous Menu Test Prints...
Page 105: Selecting Duplex (2-Sided) Oil Chase
Scroll and highlight the menu item Center Image. Press Select to turn the menu item on. Up the up and down arrow keys to enter a value to move the image to the left or right. Exit the hidden service menu. Phaser 840 and 850 Color Printers...
Page 106: Locking The Printhead
Locking the printhead During normal power-down, the printer tilts the printhead back and energizes the x-axis drive to move the printhead to the far right. This allows the printhead’s tilt arm, which moves as the printhead moves, to engage a pin protruding from the left-side printer frame.
Page 107: Adjustments
0.7 kgs (1.5 lbs.) and then tighten the tensioner in place. Do not over-tension the belt. Press here to set belt deflection Process belt tensioner 0388-28 Setting process belt tension Reinstall the left side panel. Phaser 840 and 850 Color Printers...
Page 108: Exit Roller Drive Belt Tension Adjustment
Exit roller drive belt tension adjustment Turn off the printer and remove the left-side cabinet panel. To adjust the belt tension, loosen the exit roller drive belt tensioner. With a spring scale, press downward on the idler tensioner of the exit roller drive belt with a pressure of 0.5 kg (1 lb.) then tighten the tensioner in place.
Page 109: Y-Axis Belts Tension Adjustment (Phaser 840 Printer)
Y-axis belts tension adjustment (Phaser 840 printer) Perform this procedure after loosening or removing the Y-axis belt drive assembly. Note the additional steps you must perform for a new Y-axis drive assembly. Ensure that the three mounting screws that secure the Y-axis drive assembly to the chassis are 1 turn loose and that the Y-axis idler bracket slides freely with respect to the chassis.
Page 110: Setting The Y-Axis Belt Tension
Reassemble the printer and make a test print. Tighten 3 mounting screws after setting tension Mark the pulleys Never loosen these 3 screws Attach tension tool to keyholes Y-axis belt assembly Pull lever arm to set tension 0388-30 Setting the Y-axis belt tension Service Guide...
Page 111: Y-Axis Belts Tension Adjustment (Phaser 850 Printer)
Use a distinct color if the pulleys have been previously marked. Loosen the 3 mounting screws until the bracket slides freely on the chassis and then re-tighten the screws to 30 in.-lbs. Phaser 840 and 850 Color Printers...
Page 112 Reassemble the printer and make a test print. Tighten screws (3) after setting tension Mark the pulleys Y-axis belt assembly 0388-78 Setting the Y-axis belt tension Service Guide...
Page 113: Printhead-To-Drum Spacing Adjustment (Phaser 840 Printer)
Make this adjustment after removing or replacing the printhead. The Phaser 850’s printhead mounts are factory calibrated; no printhead-to-drum calibration is needed. If calibration is ever required, follow the Phaser 840 printhead-to-drum adjustment. Remove the top cover. Remove the metal heat cover.
Page 114: Attaching The Digital Gap Indicator
Install the digital gap indicator and bracket to the left side of the printer frame and tilt arm. Ensure the digital indicator is set to inches, “in.” Press Origin to zero the digital indicator. Secure indicator in place with screw provided in frame Place indicator bracket over...
Page 115: Spacing The Printhead To The Drum
Remove the head-to-drum gap indicator and bracket from the frame. Reinstall the ink loader and metal heat cover. Select Complete from the front panel. Reinstall the top cover. Print service test print Head-to-Drum Gap to check alignment. Phaser 840 and 850 Color Printers...
Page 116: X-Axis Scale Adjustment
To correct thin, parallel pin stripes running the length of the page, appearing evenly-spaced across the width of the page (not due to a weak or missing jet). Anytime the NVRAM chip (Phaser 840 printer) or BootROM/Printer ID chip (Phaser 850 printer) is replaced Anytime an X-axis component is replaced.
Page 117: Cap/Wipe/Purge Assembly Belt Adjustments
Repeat until the right-side timing lock’s pointer points at the index mark on the right-side frame as the left-side timing belt lock’s pointer points between its index marks on the left-side frame. Phaser 840 and 850 Color Printers...
Page 118: Aligning (Timing) The Cap/Wipe/Purge Assembly Drive Belts
Belt lock Index mark on right frame Unlock Latch For new belt, break off actuator on left-side belt lock Left belt lock: align pointer between two index marks Idler pulley Lock Right Leave gap cap/wipe/purge between latch assembly belt and belt tensioner 0388-32 Aligning (timing) the cap/wipe/purge assembly drive belts...
Page 119: Drum Position Encoder Gap
Phaser 840 printer only: Ensure that the retaining spring is not in the drum-position sensor assembly’s encoder wheel groove. This ensures that the encoder wheel is not tensioned and slides easily onto the drum shaft.
Page 120: Setting The Drum Position Encoder Gap
Gap tool Groove (Phaser 840) Retaining spring (Phaser 840) Drum position sensor assembly 0388-33 Setting the drum position encoder gap Service Guide...
Page 121: Transfix Roller Pressure Spring Adjustment
Do not adjust the set screws more than 3/8 of a revolution from their original position. Any adjustment beyond this point results in ink adhesion problems. If wrinkling continues to occur, replace the drum/transﬁx assembly. Phaser 840 and 850 Color Printers...
Page 122 Original registration mark 3/8 turn 3/8 turn maximum maximum Tension spring set screws 0388-38 Adjusting the transﬁx roller pressure springs Service Guide...
Page 123: Vacuum Check
With a T-connector, connect the vacuum gauge to the between the vacuum/pump module and the cap/wipe/purge unit. Vacuum guage T-connector - 7 6 Vacuum assembly Cap/wipe/purge vacuum hose 0388-35 Connecting the vacuum gauge to the printer Phaser 840 and 850 Color Printers...
Page 124 Turn on the printer and enable the PC diagnostics as explained in the topic, “PC-based diagnostics” on the Color Printer Service & Support Resources CD-ROM. Run the from the Purge Printhead Test Head Maintenance test suite. In normal operation, the vacuum builds up a inside the vacuum module.
Page 125 Phaser 840 and 850 Color Printers...
Page 126: Cleaning And Maintenance
Cleaning and Maintenance The printer requires periodic cleaning to keep it in peak operating condition. Some cleaning procedures, such as purging the ink-jets are done automatically when necessary. Other procedures, such as scrubbing the paper-feed rollers with an alcohol- soaked cloth, must be done by customers, but only if the rollers are visibly dirty. The printer should be cleaned when any of the following symptoms occur: Light stripes or missing colors appear in prints.
Page 127: Cleaning
High-capacity Paper Tray Assembly. Duplex path jam Clean the preheat, duplex and exit rollers. Use the blue thumbwheel on the duplex roller to manually rotate the rollers. Double picks Clean pick pad with 90% alcohol. Phaser 840 and 850 Color Printers...
Page 128: Cleaning Page (Phaser 840 Printer Only)
Cleaning Page (Phaser 840 printer only) Under certain conditions, the printer purges its ink-jet nozzles to clear any jets plugged with ink. When the purge is completed, the printer outputs a cleaning page to clear the purge pattern from the print drum. Ink jets are purged under the following conditions: During warm-up from a power-off condition.
Page 129: Maintenance
Maintenance roller The printer uses the maintenance roller as part of its self-maintenance routine to coat the print drum with oil before each print. The Phaser 840 maintenance roller (and its counter) must be replaced after about 30,000 prints (the starter maintenance roller must be replaced after 10,000 prints).
Page 130: Lubrication
Lubrication Tools and supplies required Light oil Grease 006-7997-00 In general, all of the printer's bearings and motors are lifetime factory-lubricated. However, over time and under certain extreme operating conditions, oil and grease may dry out, causing squeaks and rumbling noises in the printer. Look for ﬁne metal particles —...
Page 131: Inspection
Symptoms of a malfunctioning clutch are the printer not picking paper from the tray or other paper jams. Also the cap/wipe/purge system could fail. In such cases, replace the clutch. Intermittent jams are often caused by failing clutches. Phaser 840 and 850 Color Printers...
Page 132: Resetting Nvram
Resetting NVRAM Resetting NVRAM Resetting NVRAM returns all the printers's PostScript NVRAM-stored parameters, including those of the network card, to their factory defaults, except the print count (for images processed through the image processor), the Adobe ﬁrmware serial number, the usage proﬁle and the authorization codes. Print engine NVRAM values are not changed by the following procedure.
Page 133: Resetting Print Engine Nvram Menu Item
Running Reset PE NVRAM to Default or Clear PS NVRAM downloads a ﬁle to the printer that performs the indicated reset function; there is no conﬁrmation or cancel function. Resetting print engine NVRAM menu item Phaser 840 and 850 Color Printers...
Page 134: Clearing Postscript Nvram Menu Item
Clearing PostScript NVRAM menu item Service Guide...
Page 135 Phaser 840 and 850 Color Printers...
Page 136: Key Fru Removal And Replacement
Key FRU Removal and Replacement This topic illustrates how to remove and replace key printer Field Replaceable Units (FRUs). For more detailed removal/replacement procedures, refer to the Color Printer Service & Support Resources CD-ROM. Procedures included here are: Main board and its components Power control board Power supply Upper feed roller assembly...
Page 137: Main Board And Its Components
Loosen the two rear panel securing screws. Slide out the main board. Phaser 840 printer: If you are replacing the main board, transfer the socketed realtime clock/NVRAM chip and the printer ID chip to the new board so that the printer’s settings and Ethernet address are retained.
Page 138: Removing The Phaser 850 Printer Main Board
Phaser 850 printer: If you are replacing the main board, transfer the printer ID chip to the new board so that the printer’s settings and Ethernet address are retained. Also swap the code ROM DIMM and the SDRAM DIMMs. DIMMS Code ROM Module Boot ROM/...
Page 139: Power Supply
At the right side of the printer, disconnect the two wiring harnesses leading to the power supply. Remove the four screws securing the power supply in place. Remove the power supply. Wiring harnesses Power supply 840-4-32 Removing the power supply Phaser 840 and 850 Color Printers...
Page 140: Power Control Board
Power control board Turn off the printer and remove the power cord. Remove the right cover. Remove the left cover. Remove the top cover. Remove the ink loader. Remove the main board. Remove the power supply. Remove the network card or its cover plate, whichever is in place. Remove the internal hard drive or cover plate which ever is in place.
Page 141: Upper Feed Roller Assembly
Remove the upper feed roller assembly (left side) Front: Open the front door and remove the drum maintenance drawer. Also, remove the bright, metal duplex paper guide from the front of the printer. It is held in place with two screws. Phaser 840 and 850 Color Printers...
Page 142: Removing The Upper Feed Roller Assembly (Front)
Remove the left and right maintenance drawer guides. Each is held in place by a single screw at the front and two frame latches at the rear. Note If you have trouble removing the right maintenance drawer guide, manually rotate the x-axis drive to move the printhead (in its forward position) to the center of its travel.
Page 143: Paper/Drum Heater
At the front of the paper/drum heater remove the two screws securing the heater to the inside of the printer frame. Do not confuse the mounting screws with the nearby smaller, brass-colored assembly screws. Paper / Drum heater Wiring harness 840-4-16 Removing the paper/drum heater Phaser 840 and 850 Color Printers...
Page 144: Drum/Transfix Assembly
Drum/transﬁx assembly Remove the right cover. Remove the left cover. Remove the front panel. Left side Free the wiring harness leading from the drum/transﬁx assembly along the left side of the print engine to the power control board and left I/O board.
Page 145: Removing The Drum Transfix Assembly (Left Side)
Exit roller drive-belt tensioner Wiring harness Tilt- spring Exit roller drive belt screw Compound gear Remove drum/transfix assembly screws C-clip 840-4-19 Removing the drum transﬁx assembly (left side) Phaser 840 and 850 Color Printers...
Page 146 Right side Remove the y-axis belt drive assembly. Disconnect the wiring harnesses leading to the transﬁx solenoid bracket. Remove the three screws securing the bracket in place and remove the bracket. Remove the left and right frame bridges. Each is held in place with two screws.
Page 147: Removing The Drum/Transfix Assembly (Right Side)
Wiring Left frame harnesses bridge Transfix Right frame solenoid bridge bracket Drum transfix assembly Remove 2 inside screws Remove 4 Remove screws screw 840-4-20 Removing the drum/transﬁx assembly (right side) Phaser 840 and 850 Color Printers...
Page 148 119. Set the Y-belt tension; refer to the topic “Y-axis belts tension adjustment (Phaser 840 printer)” on page 98 or “Y-axis belts tension adjustment (Phaser 850 printer)” on page 100. Power up the printer in Bypass Mode to skip the startup and mud pages.
Page 149: Drum Position Sensor Assembly (Phaser 840 Printer)
Drum position sensor assembly (Phaser 840 printer) Remove the left and right cover. Remove the top cover. Caution Unhook the head-tilt spring to avoid possible damage to the printhead and drum. Disconnect the drum home-position sensor wiring harness from J180 of left I/O board leading to the drum position assembly.
Page 150: Removing The Drum Position Sensor Assembly (Phaser 840 Printer)
Screws 840-4-18 Removing the drum position sensor assembly (Phaser 840 printer) Reverse these steps to reinstall the drum position sensor assembly. The drum must be in the same position relative to the drum position encoder wheel when the drum position sensor assembly was removed. This ensures that the stripper ﬁngers contact the drum in the same location as before;...
Page 151: Drum Position Sensor Assembly (Phaser 850)
Drum position encoder wheel 840-4-77 Marking the shaft for drum home alignment Rotate the tilt gear to orient the gear’s missing teeth to the drum position sensor assembly’s rear mounting screw. Phaser 840 and 850 Color Printers...
Page 152: Removing The Drum Position Sensor Assembly (Phaser 850 Printer)
Remove the three screws securing the drum position sensor assembly housing to the print engine. Insert the gap tool to hold the encoder wheel in position. Slide the assembly off the drum shaft. If necessary, use the small ﬂat-blade screwdriver to push the encoder disk hub along the shaft as you remove the assembly.
Page 153: Printhead
Carefully plug the printhead’s reservoir chamber holes with the silicone plugs. The plugs keep liquid ink from spilling if you should inadvertently tip the printhead. Silicone Disconnect reservoir plugs Plugging the reservoir holes Phaser 840 and 850 Color Printers...
Page 154: Removing The Printhead
If you use the removal tool, rotate the removal tool’s plastic leg into its up position. Slide the removal tool’s standoff locks inward. Place a sheet of transparency ﬁlm between the printhead and the drum to protect the drum surface. If you use the printhead removal tool, carefully, lower it onto the printhead.
Page 155 Caution Be careful not to spill ink out of the hot printhead. Adjustment Steps 4 through 8 are for the Phaser 840 printer only. Do not loosen the printhead locking screws on the Phaser 850 printer. The Phaser 850 has no printhead-to-drum adjustments.
Page 156: X-Axis Motor And Drive Assembly
X-axis motor X-axis drive yoke (remove bottom first) Phaser 840 only 840-4-22 Removing the x-axis motor and drive assembly For reassembly, apply a small amount of grease on the tip of the nose cone. Apply a small amount, 3 dabs, on the threads of the X-axis shaft. Be sure to rotate the black, plastic retainer so its end locks the yoke in position.
Page 157: Y-Axis Belt Drive Assembly (Phaser 840 Printer)
Y-axis belt assembly Never remove these screws Mounting screws 840-4-12 Removing the Y-axis belt drive assembly (Phaser 840 printer) Note Tension the drive belts using the procedure, “Y-axis belts tension adjustment” on page 68. Phaser 840 and 850 Color Printers...
Page 158: Y-Axis Belt Drive Assembly (Phaser 850 Printer)
Y-axis belt drive assembly (Phaser 850 printer) Remove the right cover. Disconnect the wiring harness leading from the front panel to the right I/O board passing beside the Y-axis belt drive assembly. Remove the drum fan. (Note the fan orientation, it blows into the drum.) Caution Never loosen or remove the three screws securing the assembly parts together.
Page 159: Cap/Wipe/Purge Assembly (Phaser 840 Printer)
Reverse these steps to reinstall the cap/wipe/purge assembly. Refer to “Wiring Diagrams” on page 191 for details on dressing the cap/wipe/purge wiring. Phaser 840 and 850 Color Printers...
Page 160: Removing The Cap/Wipe/Purge Assembly (Phaser 840 Printer)
Cap wipe/purge Vacuum assembly inlet Short pin screw Long pin screw Short pin screw 840-4-43 Removing the cap/wipe/purge assembly (Phaser 840 printer) Service Guide...
Page 161: Cap/Wipe/Purge Assembly (Phaser 850 Printer)
Removing the lower cap/wipe/purge retainer clip Disconnect the wiring harness leading from the cap/wipe/purge assembly to the power supply wiring harness. Clip the tie wraps securing the cap/wipe/purge wiring harness. Disconnect the green ground wire from the printer frame. Phaser 840 and 850 Color Printers...
Page 162: Removing The Lower Cap/Wipe/Purge Retainer Clip
From within the maintenance drawer cavity, remove the lower white retainer clip at the lower-right end of the cap/wipe/purge assembly. Plastic retainer Cap/wipe/purge clip assembly 840-4-81 Removing the lower cap/wipe/purge retainer clip Rotate the cap wipe drive gear to position the cap/wipe/purge assembly at the top of its travel.
Page 163: Removing The Cap/Wipe/Purge Assembly (Phaser 850 Printer)
Reverse these steps to reinstall the cap/wipe/purge assembly. Refer to “Wiring Diagrams” on page 191 for details on dressing the cap/wipe/purge wiring. Vacuum Cap wipe/purge inlet assembly Vacuum tube Plastic retainer clip Guide Guide 840-4-82 Removing the cap/wipe/purge assembly (Phaser 850 printer) Phaser 840 and 850 Color Printers...
Page 164: Fru List
FRU List This topic provides a list of ﬁeld-replaceable units for the Phaser 840 and 850 Color Printers. Changes to Tektronix products are made to accommodate improved components as they become available. It is important when ordering parts to include the...
Page 165: Cabinet Frus
Qty Name and description Effective Discont’d 200-4412-00 Right cover 200-4591-00 Right cover, 840GP “Designer Edition” 200-4370-00 Front cover, jam access, Phaser 840 200-4598-00 Front cover, am access door, 840GP “Designer Edition” 200-4607-00 Front cover, jam access, Phaser 850 214-4814-00 Hinge, Front cover pivot...
Page 166: Cabinet Frus
0388-21 Figure 1 Cabinet FRUs Service Guide...
Page 167: Imaging Frus
Part of 650-3619-00Gear Kit 650-3615-00 Head maintenance timing belt and ratchet clips. Part of 650-3615-00 Belt Kit 134-0265-00 Plug, Maintenance drawer life counter 650-4148-00 Y-axis tensioner, Phaser 850 200-4379-01 Cover heat plate, printhead thermal duct Phaser 840 and 850 Color Printers...
Page 168: Imaging Frus
0388-79 Figure 2 Imaging FRUs Service Guide...
Page 169: Paper Path Frus
650-4155-00 Drum/paper heater assembly, Phaser 850 351-1047-01 Upper feed assy, top half, with circuit bd 351-1048-00 Upper feed assy, lower half, Phaser 840 351-1079-00 Upper feed assy, lower half, Phaser 850 351-1035-00 Duplex paper guide 401-0841-01 Duplex roller, Phaser 840...
Page 170: Paper Path Frus
0388-80 Figure 3 Paper path FRUs Service Guide...
Page 171: Motor And Fan Frus
119-5876-00 Drum fan 147-0180-01 Paper path motor 147-0082-00 Y-axis motor, Phaser 840 147-0113-00 Y-axis motor, Phaser 850 147-0108-01 Process motor, with encoder, Phaser 840 147-0112-01 Process motor, with encoder, Phaser 850 119-5781-00 Main fan Phaser 840 and 850 Color Printers...
Page 172: Motor And Fan Frus
0388-14 Figure 4 Motor and fan FRUs Service Guide...
Page 173: Circuit Board Frus
671-4194-50 I/O board, right 671-4195-50 I/O board, left, Phaser 840 671-5026-50 I/O board, left, Phaser 850 671-4542-50 IDE hard drive, internal, Phaser 840 650-4176-00 IDE hard drive, internal, programmed, Phaser 850 386-6997-00 Blank cover plate (no hard drive) 671-3994-00 100Base T Ethernet card, Phaser 840...
Page 174: Circuit Board Frus
0388-81 Figure 5 Circuit board FRUs Service Guide...
Page 175: Solenoid And Clutch Frus
Electric clutch, pick roller 401-0807-00 Electric clutch, drum maintenance, Phaser 840 401-0871-00 Electric clutch, drum maintenance, Phaser 850 401-0792-00 Electric clutch, cap/wipe/purge drive, Phaser 840 401-0855-00 Electric clutch, cap/wipe/purge drive, Phaser 850 148-0301-01 Solenoid, transﬁx assembly Phaser 840 and 850 Color Printers...
Page 176: Solenoid And Clutch Frus
0388-23 Figure 6 Solenoid and clutch FRUs Service Guide...
Page 177: Gear And Belt Frus
Part of 650-3619-00 Gear Kit 650-3619-00 Paper path, idler 1. Part of 650-3619-00 Gear kit 650-3619-00 Paper path, idler 2. Part of650-3619-00 Gear Kit 650-3619-00 Gear/pulley, upper feed roller, preheat entry. Part of 650-3619-00 Gear Kit Phaser 840 and 850 Color Printers...
Page 178: Gear And Belt Frus
0388-22 Figure 7 Gear and belt FRUs Service Guide...
Page 179: Sensor And Flag Frus
All sensor ﬂags are provided in Flag Kit 650-3618-00 (Phaser 840 printer) or 650-4156-00 (Phaser 850 printer). Table 8 Sensor and ﬂag FRUs Parts Part number Serial number Qty Name and description Effective Discont’d 650-3618-00 Cap/wipe/purge home ﬂag, Phaser 840 650-4156-00 Cap/wipe/purge home ﬂag, Phaser 850...
Page 180: Sensor And Flag Frus
0388-15 Figure 8 Sensor and ﬂag FRUs Service Guide...
Page 181: High-Capacity Paper Tray Assembly
Qty Name and description Effective Discont’d 436-0328-00 High-capacity paper tray, A-size 436-0329-00 High-capacity paper tray, A4-size 116-0272-00 Paper pick roller 437-0467-00 High-capacity paper tray assembly, A-size, includes tray 437-0468-00 High-capacity paper tray assembly, A4-size, includes tray Phaser 840 and 850 Color Printers...
Page 182: High-Capacity Paper Tray
0388-65a Figure 9 High-capacity Paper Tray Service Guide...
Page 183: Service Tools
Hardware kit, Phaser 840 650-4145-00 Hardware kit, Phaser 850 650-3616-00 Cable kit, printer wiring harnesses, Phaser 840 650-4139-00 Cable kit, printer wiring harnesses, Phaser 850 650-4051-00 Vacuum Gauge assembly 071-0388-01 Phaser 840/850 Printer Service Quick Reference Guide Phaser 840 and 850 Color Printers...
Page 184: Supplies And Accessories
Cleaning Kit 016-1845-00 5 Tekwipes 016-1604-00 Phaser 840 Black Ink, 3 pack 016-1605-00 Phaser 840 Cyan Ink, 5 pack plus 2 black sticks 016-1606-00 Phaser 840 Magenta Ink, 5 pack plus 2 black sticks 016-1607-00 Phaser 840 Yellow Ink, 5 pack plus 2...
Page 185 Phaser 840 User Guide, Simpliﬁed Chinese 070-9102-80 Phaser 840 User Guide, Traditional Chinese 070-9102-90 Phaser 840 User Guide, Korean 070-9102-05 Phaser 840 User Guide, Russian 061-4200-00 Z840 “Designer Edition” Manual Pack: Welcome Kit, User Guide, Driver CD-ROM, Phaser 840 and 850 Color Printers...
Page 186 Cable Adapter, ATM CD-ROM, 070-9103-00 Advanced Topics and Troubleshooting Manual, English 063-3126-01 Adobe Type Manager, CD SW 063-3166-00 Phaser 840 Drivers and Utilities, CD SW 063-2627-00 Phaser 840 Drivers and Utilities, Diskettes, English 063-2627-10 Phaser 840 Drivers and Utilities, Diskettes, French...
Page 187 Power cord, Euro, 220V 161-0066-10 Power cord, United Kingdom, 240V 161-0066-11 Power cord, Australian, 250V 161-0154-00 Power cord, Swiss, 220V 161-0240-00 Power cord, Danish 065-0580-00 Shipping carton kit, Phaser 840 065-0589-00 Shipping carton kit, Phaser 850 Phaser 840 and 850 Color Printers...
Page 188: Test Prints
Test Prints This topic illustrates the service test prints produced by the printer. The test prints push the printer to the extremes of its performance to reveal possible shortcomings. Note that defects revealed by the prints may not show up at all in the course of ordinary printing.
Page 189 If necessary, remove the sensor and check it for an accumulation of debris at its contact point. As a last resort, replace the 9923-115 printhead. Phaser 840 and 850 Color Printers...
Page 190 4: Reverse Text. The print indicates if the printhead is outputting properly sized 10 point Times-Roman ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz1234567890 8 point Times-Roman ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz1234567890!@#$%^&* drops of ink and that the drum 6 point Times-Roman ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz1234567890!@#$%^&* 5 point Times-Roman ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz1234567890!@#$%^&* temperature is not too high. 4 point Times-Roman ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz1234567890!@#$%^&* 10 point Times-Roman ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz1234567890 Note: This print should be made with the...
Page 191 Likewise, some defects do not show until projected. Causes: The ink drops from the jets are traveling in incorrect trajectories. The printhead is incorrectly mounted or its printhead-to-drum spacing is incorrect. 9923-117 Phaser 840 and 850 Color Printers...
Page 192 6: 66% Gray, dot size uniformity. This print is made up of a 66% black ﬁll. It reveals variations in the ink-drop-spread caused by thermal variations or transﬁx roller pressure variations or drum oiling variations. Light band Light band Look for: Large area of differences in the density across the width of the page.
Page 193 Refer to the Reverse Text test print. 9923-119 The transﬁx pressure may be incorrect. Perform the transﬁx spring adjustment described in “Transﬁx roller pressure spring adjustment” on page 110. As a last resort, replace the drum/transﬁx assembly. Phaser 840 and 850 Color Printers...
Page 194 9: Drum Seal. These ﬁve prints are used to treat a newly installed drum. To seal a newly installed drum: 1. Power up the printer in Bypass Mode to skip the Startup and mud pages (refer to “Bypass mode (manufacturing mode)”...
Page 195 102. Generally the Phaser 850 printer. should never require this adjustment Indicates that head-to-drum gap is too small 0388-39 12.: Manuf. x-axis (scanner). This print is used for manufacturing and engineering evaluation of printhead performance. Phaser 840 and 850 Color Printers...
Page 196 13: Black Solid Fill. This prints shows uniformity of ﬁll. Look for: Even, uniform ﬁlls throughout the print. There should be no wrinkling or deformity of the paper throughout the print. Causes: Weak jets or uneven drum heating may cause uneven ﬁlls. To solve wrinkling, try different print media.
Page 197 Refer to the test print Reverse Text. The transﬁx pressure may be incorrect. Perform the transﬁx spring adjustment described in “Transﬁx roller pressure spring adjustment” on page 110. As a last resort, replace the drum/transﬁx assembly. Phaser 840 and 850 Color Printers...
Page 198 17: Cyan Solid Fill. This prints shows uniformity of ﬁll. Look for: Even, uniform ﬁlls throughout the print. There should be no wrinkling or deformity of the paper throughout the print. Causes: Weak jets or uneven drum heating may cause uneven ﬁlls. To solve wrinkling, try different print media.
Page 199 20: OHP Color Bands. This print consists of sequential bands of primary and secondary colors followed by a blue tint. This print is used for manufacturing and engineering evaluation of printhead performance. 0388-37 Phaser 840 and 850 Color Printers...
Page 200 21: Primary Solid Fills 10x. Phaser 850 printer only. This item prints 10cyan solid ﬁll prints, then 10 magenta solid ﬁll prints, then 10 yellow solid ﬁll prints and then 10 black solid ﬁll prints. 22: Manuf. Skew Margins. Phaser 850 printer only.
Page 201 Phaser 840 and 850 Color Printers...
Page 202: Wiring Diagrams
Wiring Diagrams Phaser 840 only SCSI load loader Empty High capacity Size A/A4 Main Board board paper tray 2 Empty Cover Tray present SDRAM hard Power 8 AC Drum SDRAM Printer ID drive supply Network heater card Paper 6 AC...
Page 203: Wire Routing On The Right Side Of The Printer Near Right I/O Board
Bundle vacuum hose through cable restraint Tie-wrap hose and wiring to corner of fan Tie-wrap wiring harness Wire routing on the right side of the printer near right I/O board Phaser 840 and 850 Color Printers...
Page 204: Service Guide
The power wiring harness for the ink loader is routed through a cable strap located behind the vacuum/pump module Vacuum pump Paper path motor X-axis motor Drum Right I/O board Wire dressing above the x-axis drive Service Guide...
Page 205: Vacuum Hose Dressing
Tie wraps on the vacuum hose should be trimmed closely and each tie-wrap’s “knot” should be oriented inward so that it does not rub against the printer cabinet panel. Do not pinch shut the vacuum hose. Orient knots in ties inward. Tie-wrap cap/wipe/purge wiring harness to Bundle cap/wipe/purge wiring both ends of metal vacuum hose with hose Vacuum hose dressing Phaser 840 and 850 Color Printers...
Page 206: Routing Wiring On The Left Side Of The Printer
Tie-wrap to frame Main fan Process motor encoder Tie wrap to Process bracket motor Y-axis motor High capacity paper tray Left I/O board Wrap drum position sensor wiring harness around drum temperature sensor wiring harness Routing wiring on the left side of the printer Service Guide...
Page 207: Wire Dressing Behind The Printhead
Printhead ground lugs Printhead cable restraints built into frame Maintenance tray counter sensor wiring harness restraint Wire dressing behind the printhead Phaser 840 and 850 Color Printers...

This manual is also suitable for:

Phaser 850

Tektronix PHASER 840 Service Manual

General Information

Error Codes and Messages

Troubleshooting

Adjustments

Cleaning and Maintenance

Resetting NVRAM

Key FRU Removal and Replacement

FRU List

Test Prints

Wiring Diagrams

Quick Links

Troubleshooting

Related Manuals for Tektronix PHASER 840

Summary of Contents for Tektronix PHASER 840