Tektronix Phaser 840 Quick Reference Manual Download Page 52

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Phaser 840 Color Printer

Testing for a shorted motor

Reinstall the power supply if removed in the previous procedure.

Disconnect the process motor, the Y-axis motor, X-axis motor and the
cap/wipe/purge assembly motor wiring harness.

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 and
solenoid resistances” on page 42.

If the motors and solenoids are not shorted, but the power supply still does not
function, replace the power control board.

Testing motor and solenoid resistances

Turn off the printer and disconnect the power cord.

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

Resistance (approximately)

Process motor

3 ohms

Y-axis motor

2 ohms

X-axis motor

60 ohms/phase

Paper feed motor

<1 ohms/phase

Maintenance drawer camshaft electric
clutch

10. ohms

Paper-pick electric clutch

10 ohms

Transfix cam solenoid

45 ohms

Summary of Contents for Phaser 840

Page 1: ...ice 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 This printing May 1998 071 0388 00 P H A S E R 8 4 0 C O L O R L A S E R P R I N T E R Service Quick Reference Guide ...

Page 2: ...tered trademarks of Tektronix Inc TekColor PhaserShare PhaserMatch PhaserLink Finepoint and PhaserPrint are trademarks of Tektronix Inc RealSUPPORTSM and TekColor CareSM are service marks of Tektronix Inc Other marks are trademarks or registered trademarks of the companies with which they are associated November 1998 First printing December 1998 Changed pages 41 60 76 84 85 108 126 133 May 1999 Ch...

Page 3: ...itch does not de energize the printer You must remove the power cord to disconnect the printer from the mains Keep the power cord accessible for removal in case of an emergency Safety instructions Read all installation instructions carefully before you plug the product into a power source Terms on product CAUTION A personal injury hazard exists that may not be apparent For example a panel may cove...

Page 4: ...suscitation 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 Disconnect power before removing the power supply shield soldering or replacing components Do not wear jewelry Remove jewelry prior to servicing Rings necklaces and other metallic objec...

Page 5: ... 39 Verifying power supply operation 39 Measuring power supply voltages 40 Inspecting the power supply fuses 40 Testing for shorted drivers 41 Testing for a shorted motor 42 Testing motor and solenoid resistances 42 Media jams and the paper path 43 Media based problems 43 Paper pick errors 43 Print transfer jams 44 Checking the process motor and drive train 45 Media skews passing through the paper...

Page 6: ...top of print 57 Macintosh printing problems 57 Image never prints 57 Image prints in black and white 58 Image is rotated 90 degrees 58 Printer isn t in the Chooser 58 Windows printing problems 58 Image never prints 58 Adjustments 59 Bypass mode manufacturing mode 59 Cool down mode 59 Hidden service menu 60 Bypassing a short menu 60 Printing service test prints 61 Printing the Configuration Page 61...

Page 7: ...nd Replacement 87 Main board 88 Power supply 89 Power control board 90 Paper drum heater 91 Upper feed roller assembly 92 Drum transfix assembly 94 Drum position sensor assembly 99 Printhead 101 X axis motor and drive assembly 104 Y axis belt drive assembly 105 Cap wipe purge assembly 106 Locking the printhead 108 FRU List 109 High capacity Paper Tray Assembly 126 Service tools 128 Supplies and ac...

Page 8: ...sion 65 Attaching the digital gap indicator 66 Spacing the printhead to the drum 67 Aligning timing the cap wipe purge assembly drive belts 69 Setting the drum position encoder gap 71 Adjusting the transfix roller pressure springs 73 Adjusting the x axis scale adjustment 74 Connecting the vacuum gauge to the printer 75 Resetting print engine NVRAM menu item 84 Clearing PostScript NVRAM menu item 8...

Page 9: ...t boards FRUs 119 Solenoids and clutches FRUs 121 Gears and belts FRUs 123 Sensors and flags FRUs 125 High capacity Paper Tray 127 Print engine wiring diagram 145 Wire routing on the right side of the printer near right I O board 146 Wire dressing above the x axis drive 147 Vacuum hose dressing 148 Routing wiring on the left side of the printer 149 Wire dressing behind the printhead 150 ...

Page 10: ...Environmental specifications 23 Main board power up self test error codes 25 Front panel and fault history log error codes and messages 28 Motor and solenoid resistances 42 Hidden Service Menu 60 Cabinet FRUs 110 Imaging FRUs 112 Paper path FRUs 114 Motors and fans FRUs 116 Circuit board FRUs 118 Solenoid and clutches FRUs 120 Gears and belts FRUs 122 Sensors and flags FRUs 124 High capacity Paper...

Page 11: ...t Topics such as printer theory of operation detailed removal replacement procedures configuration page details and verifying printer operation are located on the companion Color Printer Service Support Resources CD ROM To ensure complete understanding of the product we recommend participation in Phaser 840 printer service training if available The Phaser 840 printer shown with optional High capac...

Page 12: ...RAM to bring the printer to 128 Mbytes of RAM It also includes a High capacity Paper Tray and an internal IDE hard drive All printers support four available paper trays Two A and A4 trays are meant for paper and low volumes of transparencies two other A and A4 trays are meant for label stock and high volume transparencies The optional 500 sheet High capacity Paper Tray Assemblies gives the printer...

Page 13: ... it to cool causes it to perform a printhead cleaning and purge cycle upon power up The printer s purge cycle consumes a significant amount of ink During normal use and servicing turn the printer off and allow it to cool only when necessary About RAM upgrades The printer features two DIMM connectors which accept both 32 or 64 Mbytes RAM DIMMs 16 Mbyte RAM DIMMs work but are not offered The printer...

Page 14: ... Fast Color draft printing yes yes yes Standard Printing yes yes yes Enhanced Printing yes yes yes High Resolution Photo Printing no yes yes Duplex printing no yes The printer requires at least 80 Mbytes of RAM to print duplexed high resolution 1200 x 600 dpi prints yes Color PCL 5C yes yes yes Pipelining no yes yes Check Print no yes yes Collation requires hard drive no yes yes PDF printing Requi...

Page 15: ...ty 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 32 Mbytes Samsung KMM366S403CTL G0 32 Mbytes Samsung KMM366S403CTL G0 32 Mbytes Micron MT166LSDT464Ag 66ZXX 64 Mbytes Samsung KMM366S823BTL G0 64 Mbytes Micron Crucial CT8M64S4D10 MBTBGLP ...

Page 16: ... Print engine assemblies Internal features of the print engine 0388 02 Ink load assembly X axis drive and motor Paper feed motor Paper drum heater Cap wipe purge assembly Transfix roller Process motor Y axis motor Drum Printhead ...

Page 17: ... voltages to the other printer boards as well as drive many printer motors The front panel provides a user interface to the printer The printhead drive board a part of the printhead manages the signals and voltages of the printhead s printing elements and sensors The optional network card and internal hard drive could be considered a seventh and eighth circuit boards Circuit boards of the print en...

Page 18: ...olor Printer Circuit boards of the print engine left rear view 0388 04 I O board left Power control board Printhead drive board Internal hard drive Network card Main board Power supply Drum Maintenance counter EEPROM ...

Page 19: ... 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 The I2C bus also extends down to the High capacity Paper Trays The printer s I2C bus 0388 05 I2 C bus High capacity Paper Tray connection ...

Page 20: ...nthead faceplate and clear clogs from the printhead nozzles The system consists of a vacuum pump assembly the cap wipe purge assembly and the cap wipe purge carriage drive Printhead maintenance system of the print engine Cap wipe purge carriage drive Cap wipe purge assembly Vacuum pump assembly 0388 06 ...

Page 21: ...lies such as the printhead paper preheater and the drum Sensors and switches on the right side of the print engine 0388 07 Maintenance blade position sensor Paper empty sensor Cap wipe purge home sensor A4 size media sensor Ink load cover sensor Ink stick low sensor Ink stick out sensor Exit tray full sensor Top cover switch Front cover switch A size media sensor Tray type sensors Paper pick senso...

Page 22: ...rinter Drum encoder sensor Process gear position sensor Drum home position sensor Drum temperature sensor Preheater exit sensor Duplex paper sensor Transfix exit sensor 0388 34 Preheater exit sensor located on inside wall of drum transfix frame Drum Transfix roller Preheater ...

Page 23: ...ries to position the assemblies For example the printhead could be tilted forward and crash into the raised cap wipe purge assembly Before turning on the printer ensure the printhead is tilted forward centered in front of the drum and the cap wipe purge assembly is in the retracted home position The tilt cam gear should be disengaged from the gear drive train Electric clutches and solenoids are us...

Page 24: ...Network connection is provided through a built in 10baseT port A plug in SCSI interface adaptor board provides a SCSI port for an external hard drive or scanner The printer stores unique printer status and PostScript values in its NVRAM module The printer s Ethernet address unique to each printer is stored in the printer ID chip an 8 pin socketed IC All these socketed components should be transfer...

Page 25: ... on I O board right There are four tray types Letter A size This tray is sized for 8 5 x 11 inch U S paper as well as low volumes of A size transparency film Metric Letter A4 size This tray is used for 210 x 297 mm Metric paper as well as low volumes of A4 size transparency film High volume Transparency Label A This tray supports high volumes of U S size transparency film as well as laser quality ...

Page 26: ...n NVRAM I O ports and peripheral parameters Using the front panel to review and change parameters is discussed in the topic Adjustments on page 59 Buttons Four of the six buttons are arranged as a diamond shaped keypad The other two buttons are used as Select and Help In addition when in the troubleshooting menu pressing the Left arrow and the Select button enters the hidden service support menu P...

Page 27: ...opic Resetting NVRAM on page 83 explains how to use the front panel buttons to reset the NVRAM to its factory default values Printer front panel 0388 10 READY TO PRINT Navigation buttons Select button Help button Error Power ...

Page 28: ...ctors Note When an Ethernet or TokenRing PhaserShare card is installed the printer s built in 10BaseT Ethernet port is disabled The second slot accommodates an internal IDE hard drive for print job collation job accounting font storage and PDF direct printing Health LEDs Two health LEDs indicate the status of the printer s CPU functions PostScript processing and print engine control Blinking The p...

Page 29: ...l operating mode UP UP UP UP Service mode DOWN UP UP UP Reset printer UP UP UP DOWN Manufacturing mode Bypass mode UP DOWN UP UP Development mode engineering use only DOWN DOWN DOWN UP Recovery mode engineering use only DOWN UP DOWN UP Printer rear panel 100 Mbs 10 100Base TX 10Base2 TP LINK TX RX PhaserShareTM Series B Ethernet Card 0388 11 IDE hard drive Network card SCSI Service RS 232 Parallel...

Page 30: ...ximately 36 kgs 79 lbs Print engine weight only add 9 kgs 20 lbs for each optional High capacity Paper Tray Assembly Printer installation clearances Clearances Value Top 45 7 cm 18 ins Left 10 2 cm 4 ins Right 10 2 cm 4 ins Front 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 flatness Wit...

Page 31: ...seconds per print Fast Transparency film 273 x 300 dpi on A or A4 size 12 seconds per print Standard Transparency film 409 x 409 dpi on A or A4 size 22 seconds per print Print times do not include image processing time which varies due to image complexity 25 mm 1 in margins assumed with 35 ink coverage Minimum printing margins All sides 5 mm 0 2 in Maximum print area A size 8 1 x 10 6 in A4 size 2...

Page 32: ... amp slo blo Fuses are not user accessible Secondary voltages 5V 2 5 12 V 5 12 V 5 40 V 5 12 52 V 10 54 V 10 RF emissions Both 115 and 220 VAC configured instruments pass these standards EC EN60950 1992 Safety of Information Technology Equipment including Business Equipment EC EN55022 1992 Limits and methods of measurement of radio interference characteristic of Information Technology Equipment EC...

Page 33: ... m 50 000 ft Vibration shock Non Operating vibration Non operating shock Operating shock Will withstand 0 15 G excitation 5 to 200 Hz 3 axes for up to 7 minutes with no impairment or subsequent damage 0 5 g 25 minute sweep 5 200 5 Hz 100 200 sec sweep cycles The printer may have any corner raised and dropped 1 5 cm 0 6 in while printing is in progress without impairment of operation that cannot be...

Page 34: ... 22 Class B VCCI CISPR 22 Class B EN61000 3 2 Flicker on AC Mains Susceptibility 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 ...

Page 35: ...d in the following table Other failures are indicated by the failure being printed on the Startup Page After successful power up the left LED flashes at a regular heartbeat rate The front panel Power light is turned on the Error light is flashed and the LCD is cleared Table 3 Main board power up self test error codes Left LED flashes Long flash 5 Short flash 1 2L 1S 11 Meaning Details 1 not used 2...

Page 36: ... test failures with this component are treated as non fatal errors with the error information written to the Start Page If a failure is detected the message SCSI Option Card with one of the following messages will be sent to the Start Page Wrong values in script set scratch registers Script operation timed out Script operation returns wrong exit code DMA transfer spills outside buffer DMA transfer...

Page 37: ...with the error information written to the Start Page If a failure is detected the message Token Ring Option Card with one of the following messages will be sent to the Start Page General error Problem with EEPROM Error trying to Bring Up Diags Error initializing device Command completion error Interrupt error Wrong vendor ID Wrong microcode version Wrong version ID none LocalTalk Option Card This ...

Page 38: ...thead NVRAM data was all zeros has this printhead been through normalization If so check wiring to printhead 4 003 42 0x2403 PC_DEV_FAULT_HEAD _ONES Printhead NVRAM data was all ones has this printhead been through normalization If so check the wiring to the printhead 4 004 43 0x2404 PC_DEV_FAULT_HEAD _CHECKSUM Printhead NVRAM checksum failure the data within the printhead NVRAM has been corrupted...

Page 39: ... engine has attempted to move the process motor through enough revolutions to disengage the head tilt mechanism but the motor stalled The X axis was then displaced to the right 3 8 mm 0 15 in and the disengage was repeated but the motor stalled again This fault is then declared The head is unable to move on its tilt axis perhaps because it is colliding with something head restraint pin cap poorly ...

Page 40: ...edia to the drum surface and creating a mess around the stripper fingers 4 023 66 Cannot tilt head forward The engine was attempting to do something that required the printhead to be in print position The printhead was not in position and some condition was preventing the code from tilting it 5 000 Y axis drum 5 001 41 0x2c01 YA_HOME_FAIL Drum home sensor failure the drum turned one full revolutio...

Page 41: ...of the cap home sensor did not occur The home sensor may be faulty or the cap motor may not be operating or the cap may be jammed and unable to move 8 002 46 CAP_FAULT_ OVERCURRENT The cap wipe purge assembly stalled Defined but not used 9 000 Ink loader ink melters and printhead ink level sensors 9 001 45 0x4c01 IL_FAULT_C_ TWANGER Malfunction of the ink level sensor in the cyan reservoir Replace...

Page 42: ...mer parameter block in its linked list The block was not found 13 000 Printhead thermals 13 001 40 0x6c01 TCH_JS_LEFT_OPEN The thermistor in the left jet stack appears to be open Replace the printhead 13 002 41 0x6c02 TCH_JS_LEFT_SHORT The thermistor in the left jet stack appears to be shorted Replace the printhead 13 003 42 0x6c03 TCH_JS_LEFT_HOT The left jet stack heater is running away Unplug t...

Page 43: ...t heating at all or is not heating as quickly as it should Check for an open connection or open thermistor in power supply 15 000 Drum thermals 15 001 42 0x7c01 TCD_THERMISTOR_ OPEN The drum thermistor appears to be open Replace the drum temperature sensor 15 002 43 0x7c02 TCD_THERMISTOR_ SHORT The drum thermistor appears to be shorted Replace the drum temperature sensor 15 003 44 0x7c03 TCD_THERM...

Page 44: ...ly Wave Amplifier on the power control board print head interconnect cable etc 19 002 4X HC_DEV_FAULT 0x02 Occur when the printer is attempting to determine how many data taps the print head uses If this process fails an fault is declared Any part in the chain could be responsible for the incorrect reading including the print head electronics the A D electronics the waveform generation electronics...

Page 45: ...ty pick sensors 05 Standard tray sensors 06 Standard tray pick sensors 07 Handfeed sensors 08 Preheat entry sensor 09 Width sensors 10 Width A sensor 11 Width A4 sensor 12 Preheat exit sensor 13 Stripper exit sensor 14 Media Exit sensor 15 undefined 16 VE_DM CYCLE_DONE out of order 17 VE_TF_ROLLER_LIFTED out of order 18 Unknown reason 31 000 Motor Faults 31 001 4x MP_FAULT_AUX_MOTO R_ERROR Not use...

Page 46: ...36 Phaser 840 Color Printer ...

Page 47: ...two status LEDs at the rear panel should be blinking and the front panel LEDs are turned on 2 If POST diagnostics pass the front panel Error LED is turned off and the LCD display is cleared 3 If the printhead is in either the Standby or Print position a If the printer is in its Standby mode the cap wipe purge motor is run to ensure that the cap wipe purge assembly activates its home position senso...

Page 48: ... position then the heaters in the printhead and cap wipe purge assembly are activated in case the printhead and cap wipe purge may be glued together by cooled ink b After waiting for the ink to melt the cap wipe purge assembly is lowered to its home position c The process motor is rotated to tilt the printhead forward if not already forward rotate all the rollers to their ready positions disengage...

Page 49: ...hed and the LCD is cleared Verifying print engine operation by printing its startup page 1 If not already on turn on the printer If the printer does not begin initializing go to the topic Verifying power supply operation below 2 Once the Power light is on not blinking and the front panel displays Ready to Print scroll to Menu and press Select Then scroll to the Printer Configuration menu item pres...

Page 50: ...unted on the power supply 1 Turn off the printer and remove the power cord 2 Remove the screws securing the power supply Disconnect the wiring harnesses plugged into the power supply and remove power supply 3 With a DMM determine that the fuses on the power supply are functional Fuse F1 is the AC input fuses for the DC section of the power supply If F1 opens the power supply does not function and ...

Page 51: ...nter Reconnect the 40 volt service connector to the power control board then disconnect all load connectors from the power control board Turn the printer on If the rear panel LEDs still do not illuminate the power control board has a shorted driver and must be replaced If the LEDs do illuminate isolate which motor or fan is overloading the power control board and power supply by turning off the pr...

Page 52: ...olenoids are not shorted but the power supply still does not function replace the power control board Testing motor and solenoid resistances 1 Turn off the printer and disconnect the power cord 2 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 a...

Page 53: ... 32 lb Bond 60 120 g m2 or 50 80 lb Cover 135 220 gm2 6 Ensure that envelopes are of the acceptable size and orientation with the side flap up Paper pick errors Paper pick errors occur when the media in the media tray mispicks or the printer double picks two or more sheets of paper 1 Fan the media before inserting it in the media tray 2 In humid environments keep media sealed in packaging until it...

Page 54: ...ed 9 Inspect the paper feed module for obstructions Print transfer jams 1 Using PC diagnostics test the paper preheater If the test fails replace the paper drum heater assembly 2 Check to see if the upper feed roller drive belt is broken or slipped off of its pulleys In such a case the upper feed roller does not rotate when the lower feed roller rotates 3 Check that the feed rollers rotate smoothl...

Page 55: ...he motor s winding resistances are within specification inspect the wiring harness for nicks crimps opens or other problems If the harness is functional then replace the power control board 5 Inspect the gear train on the inside of the printer frame look for stripped gears or broken teeth Be sure to inspect the inner teeth on the process motor gear Media skews passing through the paper path 1 Chec...

Page 56: ...otor 3 Replace the power control board Streaks or lines down the print 1 Clean the blade of the drum maintenance drawer 2 Possible missing or weak jet Print the service test print Weak Missing Jet to determine if a jet is not performing Perform up to three printhead cleaning cycles to try to clean a clogged jet 3 If necessary turn off the printer and allow the printhead to cool for 4 hours 4 Test ...

Page 57: ...itiated cleaning process Remove ink smears 11 Smears on a duplex print can also be caused by the paper preheater operating at a too high temperature Use the PC diagnostics to check the paper preheater s temperature Replace if necessary Missing ink or light colored ink band running length of print Possible missing or weak jet 1 Print the Service Test Print 2 Weak Jet to determine if a jet is not pe...

Page 58: ...railing ends of the sheet of paper extending from the entry and exit of paper preheater gently pull the sheet of paper back and forth several times and then remove the sheet of paper Be careful of the paper sensor flags 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 trans...

Page 59: ...the drum maintenance cam roller and the left and right cam actuators it pushes against 2 Perform the procedure Printhead to drum spacing adjustment on page 66 and Transfix roller pressure spring adjustment on page 72 3 Replace the printhead Not printing The printer processes a sheet of paper but no image is printed on it 1 No drive voltages to the printhead Check for a loose connector leading to t...

Page 60: ...properly positioned 3 If the problem persists replace the printhead Poor primary color fills Primary fills appear banded and inconsistent 1 Head to drum gap is too small Verify the gap with the adjustment explained in the topic Printhead to drum spacing adjustment on page 66 2 Verify the drum temperature using PC based diagnostics Ensure the drum temperature sensor is properly positioned 3 Verify ...

Page 61: ...rature sensor is properly positioned 2 Inspect and clean the drum temperature sensor 3 Ensure that the X axis drive system is correctly assembled and lubricated 4 If the problem persists replace the printhead Ghosting Drum is too warm 1 Verify the drum temperature using PC based diagnostics Ensure the drum temperature sensor is properly positioned 0388 48 0388 49 ...

Page 62: ...nce cam roller and electric clutch operating correctly Test them using PC based diagnostics 3 Ensure the left and right drum maintenance actuators operate correctly when lifted by the cams of the drum maintenance cam roller Vertical line appear wavy Straight vertical lines appear to be wavy and ill formed 1 Too much oil on the drum Inspect the drum maintenance drawer Is the wiper blade damaged If ...

Page 63: ... correctly when lifted by the cams of the drum maintenance cam roller Poor ink adhesion poor image durability 1 Verify the paper preheater temperature using PC based diagnostics 2 The drum is too cold Verify the drum temperature using PC based diagnostics Ensure the drum temperature sensor is properly positioned and has no contamination between it and the drum surface 3 Try a different paper if a ...

Page 64: ... sufficient oil Replace the drum maintenance roller if necessary 3 Are the drum maintenance cam roller and electric clutch operating correctly Test them using PC based diagnostics 4 Ensure the left and right drum maintenance actuators operate correctly when lifted by the cams of the drum maintenance cam roller 5 The drum may be too warm verify the drum temperature using PC based diagnostics Ensure...

Page 65: ...ng component is causing the defect 1 Repeating defect 13 6 cm 5 34 in are caused by the transfix roller 2 White or dark lines parallel to the long edge of the print spaced 1 4 mm 0 054 in in solid fills using Standard printing mode indicate the X axis step accuracy is incorrect Ensure the long spring mounted underneath the printhead is intact and not contaminated with ink remove the maintenance dr...

Page 66: ...rinthead Wrinkling 1 Try different media from a sealed package In high humidity environments paper left exposed unpacked absorbs moisture and begins to warp 2 Ensure the deskew fingers inside the front cover are not damaged or missing 3 Inspect the maintenance drawer wiper blade Replace the maintenance drawer if necessary 4 The transfix spring pressure is incorrect Perform the procedure Transfix r...

Page 67: ...a different application 2 In the Chooser switch background printing off Try printing the job again With newer LaserWriter printer drivers select Foreground Printing in the Print dialog box 3 Download the Echo showpage snippet which produces a blank sheet of paper to determine if the printer is receiving and processing files 4 Make sure you are printing with the correct PPD file 5 Activate Error Ha...

Page 68: ... CD ROM Image is rotated 90 degrees 1 In the application s Page Setup make sure that the image is selected to print in Portrait or Landscape orientation as you expect Printer isn t in the Chooser 1 Ensure that the printer is turned on and the rear panel health light is flashing at a regular rate 2 Check the Network or AppleTalk control panel to ensure the proper network or zone is selected 3 Check...

Page 69: ...s all switches up 2 Turn on the printer The printer will not print a Cleaning page 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 When the printer is turned off it automatically gives the option of performing a quick cool down 1 Turn off the printer 2 Scroll to the menu item Shutdown For Moving Printe...

Page 70: ...ter Configuration menu 1 While holding the Left arrow button press Select The front panel will display the complete menu list 2 Exiting from the submenu returns the printer to the short version of the Printer Configuration menu Hidden Service Menu Troubleshooting Previous Menu Test Prints Fault History Reset NVRAM Cool Down for Power Off Reset Printer Head Adjust Adjust X axis Scale Drift Compensa...

Page 71: ...the menu item Print Configuration Page and press the Select button 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 Selecting Duplex Oil Chase This item is turned on to correct a print artifact called b...

Page 72: ... belt tension loosen the process belt tensioner With a spring scale press inward on the tension idler of the process belt with a pressure of 0 7 kgs 1 5 lbs and then tighten the tensioner in place Do not over tension the belt 3 Reinstall the left side panel Setting process belt tension 0388 28 Process belt tensioner Press here to set belt deflection ...

Page 73: ...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 Do not over tension the belt 3 Reinstall the left side panel Setting exit roller drive belt tension Press here to set belt deflection Exit roller drive belt tensioner 0388 29 ...

Page 74: ...tion to the keyholes in the side frame of the printer just below and in front of the Y axis drive assembly The tool s fishhook should engage the eyelet of the Y axis drive assembly 3 Pull forward and down on the lever arm of the tension tool to apply tension to the Y axis belts 4 While the belts are under tension rotate the drum pulley 5 times to rotate the belts and seat them in place 5 Beginning...

Page 75: ... Reassemble the printer and make a test print Setting theY axis belt tension Attach tension tool to keyholes Y axis belt assembly 0388 30 Pull lever arm to set tension Tighten screws after setting tension Mark the pulleys ...

Page 76: ...that the printhead can be accessed Do not unplug the printhead 5 If not already tightened tighten the printhead mounting screws to 20 in lbs 6 If not already loose loosen the printhead s four locking screws two at each end of the printhead until they are just snug in place 7 Install the digital gap indicator and bracket to the left side of the printer frame and tilt arm Ensure the digital indicato...

Page 77: ...0 in lbs 11 If not connected plug the printhead s data ribbon cable and power wiring harness into the power control board Inspect both ends of the data ribbon cable to ensure they are properly seated 12 Recheck the gap at both ends of the printhead 13 Remove the head to drum gap indicator and bracket from the frame 14 Reinstall the ink loader and metal heat cover 15 Select complete from the front ...

Page 78: ...etween the printhead faceplate and the cap wipe purge assembly 1 Ensure that the cap wipe purge assembly is properly installed 2 Rotate the large drive gear to pull the cap wipe purge assembly to about the middle of its travel in the chassis frame slot 3 Ensure each timing belt lock is tightened to its fourth tooth as illustrated 4 Position the left side timing belt lock so its pointer points betw...

Page 79: ...elts Unlock Index mark on right frame Belt lock Right cap wipe purge assembly belt Fan Latch Lock Leave gap between latch and belt tensioner 0388 32 Idler pulley Left belt lock align pointer between two index marks For new belt break off actuator on left side belt lock ...

Page 80: ... that the encoder wheel is not tensioned and slides easily onto the drum shaft 2 If not already mounted in place secure the drum position sensor assembly onto the drum shaft and secure it to the printer frame 3 Through the access hole in the drum position sensor assembly position the encoder gap tool on the drum shaft 4 Reposition the drum position sensor assembly s encoder wheel on the drum shaft...

Page 81: ...Service Guide 71 Setting the drum position encoder gap Drum position sensor assembly 0388 33 Retaining spring Groove Gap tool ...

Page 82: ...e both the left and right spring set screws 6 On the side of the printer corresponding to the wrinkling tighten the set screw clockwise 1 8 of a revolution using a 4 mm hex driver On the side that does not wrinkle loosen its set screw 1 8 of a revolution Note Whatever adjustment is added to one side must be taken away from the other side to maintain roller balance 7 Reassemble the printer and agai...

Page 83: ...Service Guide 73 Adjusting the transfix roller pressure springs Tension spring set screws Original registration mark 3 8 turn maximum 3 8 turn maximum 0388 38 ...

Page 84: ...ss Select 3 Scroll to the service menu item Test Prints and press Select Choose the test print 1 X axis Motion and press Select to print it 4 Interpret the second of the two X axis motion prints The print features four purple columns each containing a jagged black band The black bands should all align horizontally with each other 5 If an adjustment is needed scroll to the menu item Set X axis Scal...

Page 85: ...ad faceplate 1 Turn off the printer 2 Remove the top and right side covers 3 With a T connector connect the vacuum gauge to the between the vacuum pump module and the cap wipe purge unit Tools required Magnetic screwdriver Vacuum gauge T 20 TORX tip T 15 TORX tip PC diagnostics Connecting the vacuum gauge to the printer 0388 35 Vacuum guage 40 20 0 60 76 Cap wipe purge vacuum hose T connector Vacu...

Page 86: ... the vacuum as it is applied to the printhead the cap wipe purge assembly should be sharply sucked against the printhead faceplate If it is not there may be an ink clog in the vacuum tube leading to the cap wipe purge assembly If the vacuum does not bleed off then the air valve is not opening properly the 7 mil orifice a part of the vacuum pump assembly is blocked or the vacuum tubing may be clogg...

Page 87: ...aned when any of the following symptoms occur Light stripes or missing colors appear in prints Ink smears or random streaks appear on the front or back of prints Oily spots appear along the top of prints Mispicks or multiple picks occur at the media tray Persistent paper jams inside the printer or at the media tray Wiggly vertical stripes caused by too much oil created by a dirty maintenance drawe...

Page 88: ...ck or edges of a page Select the automated procedure Remove Ink Smears from the front panel Troubleshooting menu Check the drum maintenance tray for ink and paper dust build up on the wiper blade Oil drum fluid on top edge of print Select the automated procedure Remove Ink smears from the front panel Troubleshooting menu Media jams Problem type Solution Paper pick or jamming problems at the tray C...

Page 89: ...he printer exits the Energy Star mode When customers initiate the Eliminate Light Stripes automatic cleaning procedure from the front panel Vacuum Vacuum dust from the top cover the metal heat duct over the printhead and plastic dust cover under the stripper fingers Drum temperature sensor With a dry swab clean any buildup around the drum temperature sensor You can access the sensor through the op...

Page 90: ... printing is possible Refer to the instructions included with the kit to replace the maintenance roller kit Note The drum fluid an oil poses no known adverse health effects Refer to the Material Safety Data Sheet for amino oil in Phaser 840 Printer Advanced Features and Troubleshooting Manual for more information Waste tray The maintenance drawer contains a waste tray that collects ink that has be...

Page 91: ...rop of light oil to a bushing if it is noisy or running dry Plastic gear train This gear train from the process motor to the paper feed module requires only a small amount of white grease for noise reduction purposes Apply grease sparingly so that it does not fling off of the gears when they turn You need only to apply a dab of grease to a single gear and the grease will migrate throughout the ent...

Page 92: ...o belts from the y axis motor drive A belt from the lower paper feed roller to the upper paper feed roller Two belts on the cap wipe purge drive An exit roller drive belt A small belt for driving the cap wipe purge assembly from the cap wipe purge clutch Look for these problems Loose rubber particles below the belts indicate a worn belt Missing teeth in the belts Cracking or moderate fraying a sma...

Page 93: ...nd the authorization codes Print engine NVRAM values are not changed by the following procedure To reset the printer to its factory default values follow this procedure 1 If possible print the Configuration Page for a record of all the printer s port settings and other customer unique settings 2 Enter the Troubleshooting menu 3 Press and hold the Left arrow button 4 While holding the Left arrow bu...

Page 94: ...AM contents or the PostScript NVRAM contents to their factory default values as shown in the following illustrations 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 ...

Page 95: ...Service Guide 85 Clearing PostScript NVRAM menu item ...

Page 96: ...86 Phaser 840 Color Printer ...

Page 97: ...r to the Color Printer Service Support Resources CD ROM Procedures included here are Main board Power control board Power supply Upper feed roller assembly Preheat drum heater assembly Drum transfix assembly Drum position sensor assembly Printhead X axis motor and drive assembly Y axis belt drive assembly Cap wipe purge assembly This topic concludes with a discussion about printhead locking ...

Page 98: ...ing screws 3 Slide out the main board If you are replacing the main board transfer the socketed realtime clock NVRAM chip and the printer ID chip to the new board so the printer s settings and Ethernet address are retained Also swap the SCSI riser board code ROM DIMM and the SDRAM DIMMs Removing the main board 840 4 36 Main board RAM DIMMS Real time clock NVRAM SCSI riser board Printer ID Code ROM...

Page 99: ...he printer and remove the power cord 2 Remove the right cover Remove the left cover 3 Remove the rear cover 4 Remove the top cover 5 At the right side of the printer disconnect the two wiring harnesses leading to the power supply 6 Remove the four screws securing the power supply in place Remove the power supply Removing the power supply 840 4 32 Power supply Wiring harnesses ...

Page 100: ...ove the network card or its cover plate whichever is in place 8 Remove the internal hard drive or cover plate which ever is in place 9 Disconnect the wiring harnesses leading to the power control board 10 Remove the four screws securing the power control board cover plate Remove the plate 11 Remove the four screws securing the power control board in place Lift and remove the board Removing the pow...

Page 101: ...s described in the topic Upper feed roller assembly on page 92 4 Disconnect the locking wiring harness from the right side of the paper drum heater 5 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 Removing the paper drum heater Paper Drum heat...

Page 102: ...and compound gear from the left end of the upper feed roller Note the small slot in the compound gear to ease removal 6 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 Remove the upper feed roller assembly left side 840 4 13 Compound gear Slot Feed drive belt Upper fee...

Page 103: ...ide of the printer frame 9 Disconnect the wiring harness leading from the upper feed roller assembly to the inside the left side of the printer frame 10 Remove the C clip located on the left inside printer frame securing the upper feed roller assembly in place 11 Remove the upper feed roller assembly Separate the assembly into its two halves Removing the upper feed roller assembly front Keyed bush...

Page 104: ...the left side of the print engine to the power control board and left I O board 5 Remove the drum position sensor assembly 6 Remove the upper feed roller assembly 7 Remove the paper drum heater 8 Remove the drum temperature sensor 9 Remove the C clip securing the compound gear and remove the gear 10 Loosen the exit roller drive belt tensioner Remove the exit roller drive belt 11 Remove the tilt ar...

Page 105: ...e 95 Removing the drum transfix assembly left side 840 4 19 Exit roller drive belt tensioner Exit roller drive belt Wiring harness Tilt arm spring Hex screw Compound gear Remove drum transfix assembly screws C clip ...

Page 106: ...ace with two screws 15 Remove the two screws securing the front of the drum transfix frame to the inside printer frame 16 Remove the five screws securing the left side of the drum transfix assembly to the print engine Note that one screw is removed with a 3 32 hex key 17 Remove the five screws securing the right side of the drum transfix assembly to the print engine Note that one screw is removed ...

Page 107: ...7 Removing the drum transfix assembly right side 840 4 20 Left frame bridge Remove hex screw Remove 4 screws Remove 2 inside screws Right frame bridge Wiring harnesses Transfix solenoid bracket Drum transfix assembly ...

Page 108: ...sition encoder sensor gap b Set the Y belt tension refer to the topic Y axis belts tension adjustment on page 64 c Power up the printer in Bypass Mode to skip the startup and mud pages d Select service test print 10 Manufacturing Paper Path to verify the paper path and that all ink jets operate e Print service test print 9 Seal Drum to seal the new drum f Perform the printhead to drum adjustment d...

Page 109: ...om the drum position assembly 5 Precisely mark the end of the drum shaft relative to the drum home flag on the drum position sensor assembly this is not necessary if you are also replacing the drum as part of the drum transfix assembly 6 Rotate the tilt gear to orient the gear s missing teeth to the drum position sensor assembly s rear mounting screw 7 With a small flatblade screwdriver slide the ...

Page 110: ...mbly 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 otherwise print artifacts will result Install the encoder wheel on the drum shaft precisely aligning the home flag to the alignment mark drawn on the shaft Use the encoder whe...

Page 111: ... top cover 4 Remove the ink loader 5 Remove the metal heat duct from over the printhead 6 Disconnect the power wiring and data harnesses leading from the printhead to the power control board Also disconnect the two ground wires from the printer frame 7 Carefully plug the printhead s reservoir chamber holes with the silicone plugs The plugs keep liquid ink from spilling if you should inadvertently ...

Page 112: ...ocedure Printhead to drum spacing adjustment on page 66 Ensure the digital indicator is set to inches in Press Origin to zero the digital indicator 5 At the left of the printhead insert the left printhead spacer between the printhead and the drum Check the indicator it should read 0 0030 0 0010 inches Adjust the printhead s spacing adjustment by twisting a flat blade screwdriver in the adjustment ...

Page 113: ...Service Guide 103 Removing the printhead Install removal tool 840 4 24 Loosen mounting screws Slide lock to secure to printhead Removal tool leg in up position ...

Page 114: ...on of the X axis drive yoke Lift up on the yoke and remove the upper portion of the yoke 7 Rotate the X axis cone gear counter clockwise to remove it from the X axis shaft 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 it ends locks the yoke in position Perform ...

Page 115: ...Caution Never loosen or remove the three screws securing the assembly parts together 4 Remove the three tension set screws securing the Y axis belt drive assembly to the engine frame Remove the assembly with its two belts Note Tension the drive belts using the procedure Y axis belts tension adjustment on page 68 Removing theY axis belt drive assembly 840 4 12 Y axis belt assembly Tension screws Ne...

Page 116: ...he cap wipe purge assembly 25 mm 1 in from the top of its travel 8 Place a few sheets of paper between the drum and the cap wipe purge assembly to prevent scratching the drum 9 Remove the right timing belt s lower pulley to create slack in the right timing belt 10 Remove the metal vacuum line from the assembly 11 Remove the wiring from the right cap wipe purge assembly bracket 12 Push the wiring t...

Page 117: ...Service Guide 107 Removing the cap wipe purge assembly Short pin screw Cap wipe purge assembly Vacuum inlet 840 4 43 Long pin screw Short pin screw ...

Page 118: ...lts driving the tilt arm After servicing the printer When you service the printhead x axis drive cap wipe purge assembly or other relevant printer components leave the printhead in its print position centered in front of the drum Upon power up the printer can safely move the printhead Manually locking the printhead If you must manually lock the printhead 1 With the printer powered off carefully ti...

Page 119: ...rinter produced on that day The serial number is coded as follows BLxxDMY B indicates the headquarter city of the manufacturing company Beaverton L indicates the modification level of the printer ranging alpha numerically from 0 to Z xx alpha numerically indicates the sequence of the printer among the printers produce on that day of manufacture ranging from 01 to ZZ representing 1 to 1296 the lett...

Page 120: ...gner Edition 3 214 4814 00 1 Hinge Front cover pivot 4 650 4028 00 650 4121 00 1 Front cover control panel Front cover control panel 840DP Designer Edition 5 200 4365 00 200 4589 00 1 Left cover Left cover 840DP Designer Edition 6 200 4375 00 200 4599 00 1 Exit cover Exit cover 840DP Designer Edition 7 200 4367 00 200 4600 00 1 Top cover with inkload door Top cover with inkload door 840DP Designer...

Page 121: ...Service Guide 111 Figure 1 Cabinet FRUs 7 5 6 8 1 2 4 0388 21 3 ...

Page 122: ...m transfix assembly Part of 650 3617 00 Drum Transfix Assy Kit 8 441 2137 00 1 Cap wipe purge assembly 9 650 3623 00 1 Printhead kit 10 174 3807 00 1 Cable printhead data 11 650 4025 00 1 Ink loader 12 166 0714 00 1 Vacuum hose rubber 13 147 0079 00 1 Vacuum pump assembly 14 166 0713 00 1 Vacuum hose rigid 15 650 3615 00 1 Head maintenance drive belt Part of 650 3615 00 Belt Kit 16 650 3619 00 1 P...

Page 123: ...Service Guide 113 Figure 2 Imaging FRUs 4 2 3 6 5 7 8 11 9 13 15 17 16 12 14 1 2 0388 18 18 10 ...

Page 124: ...4 401 0778 01 1 Lower feed roller 5 401 0813 00 1 Paper pick roller 6 119 5743 00 1 Drum paper heater assembly 7 351 1047 00 351 1048 00 1 1 Upper feed assy top half with circuit bd Upper feed assembly lower half 8 351 1035 00 1 Duplex paper guide 9 401 0784 01 1 Duplex roller 10 650 4026 00 1 Upper stripper finger assembly 11 386 7018 00 1 Lower stripper finger assembly 12 401 0781 01 1 Exit roll...

Page 125: ...Service Guide 115 Figure 3 Paper path FRUs 0388 16 2 1 5 11 10 9 12 6 4 3 7 13 8 ...

Page 126: ... number Effective Discont d Qty Name and description 1 147 0086 00 1 X axis motor with gear 2 650 3621 00 1 X axis drive assembly 3 119 5876 00 1 Drum fan 4 147 0180 00 1 Paper path motor 5 147 0082 00 1 Y axis motor 6 147 0108 01 1 Process motor with encoder 7 119 5781 00 1 Main fan ...

Page 127: ...Service Guide 117 Figure 4 Motors and fans FRUs 0388 14 7 4 3 5 6 2 1 ...

Page 128: ...1 Masked avail Mar 99 Code ROM DIMM English OS 1 36 PS 8 64 Eng 8 12 Net 10 50 Code ROM DIMM English OS 1 38 PS 8 76 Eng 8 22 Net 10 62 Code ROM DIMM Japanese Morisawa Code ROM DIMM Chinese Traditional Code ROM DIMM Chinese Simplified Code ROM DIMM Korean Hangul Code ROM DIMM Japanese Heisei Flash Code ROM DIMM Japanese Morisawa Code ROM DIMM Chinese Traditional Code ROM DIMM Chinese Simplified Co...

Page 129: ...Service Guide 119 Figure 5 Circuit boards FRUs 4 3 5 2 1 9 7 6 8 10 11 13 0388 13 12 ...

Page 130: ... Effective Discont d Qty Name and description 1 401 0792 00 1 Electric clutch upper feed roller exit roller 2 401 0808 00 1 Electric clutch pick roller 3 401 0807 00 1 Electric clutch drum maintenance 4 401 0792 00 1 Electric clutch cap wipe purge drive 5 148 0301 00 1 Solenoid transfix assembly ...

Page 131: ...Service Guide 121 Figure 6 Solenoids and clutches FRUs 4 5 3 2 1 0388 23 ...

Page 132: ...15 00 1 Guide head tilt 9 650 3615 00 2 Head maintenance timing belt and ratchet clip Part of 650 3615 00 Belt Kit 10 650 3619 00 5 Pulley drive head maintenance Part of 650 3619 00 Gear Kit 11 650 3615 00 1 Exit roller drive belt Part of 650 3615 00 Belt Kit 12 650 3619 00 5 Pulley exit drive Part of 650 3619 00 Gear Kit 13 650 3615 00 1 Tensioner exit drive belt Part of 650 3615 00 Belt Kit 14 6...

Page 133: ...Service Guide 123 Figure 7 Gears and belts FRUs 0388 22 9 7 3 4 2 13 15 11 5 10 6 14 12 16 17 18 19 1 8 ...

Page 134: ...ensor handfeed sensor Part of 351 1047 00 upper feeder roller assy with circuit bd 8 119 5803 00 1 Preheater exit sensor assembly 9 119 4968 00 1 Process gear sensor 10 650 3622 00 1 Y axis encode kit 11 650 3618 00 1 Transfix exit sensor flag Part of 650 3618 00 Flag Kit 12 644 0927 00 1 Front cover open sensor Part of 644 0927 00 Front cover Control Panel 13 650 3618 00 1 Duplex paper sensor fla...

Page 135: ...Service Guide 125 Figure 8 Sensors and flags FRUs 0388 15 7 3 2 1 4 5 9 8 10 16 12 17 14 18 19 6 11 13 15 ...

Page 136: ...erial number Effective Discont d Qty Name and description 1 436 0328 00 436 0329 00 1 High capacity paper tray A size High capacity paper tray A4 size 2 116 0272 00 1 Paper pick roller 437 0467 00 437 0468 00 1 High capacity paper tray assembly A size includes tray High capacity paper tray assembly A4 size includes tray ...

Page 137: ...Service Guide 127 Figure 9 High capacity PaperTray 0388 65a 1 2 ...

Page 138: ...eplacements 063 3009 00 1 Service diagnostics diskette SW 650 3973 00 Tool kit Torque Screwdriver Encoder Alignment Tool Head to Drum Gap Tool Assy Y Axis Belt Tensioner tool Hot Head Assy Hot Head Plug Assy Serial Adapter Cable 40 v Service Plug PC DB 9F to DB25M Cable T 10 Torx Bit T 15 Torx Bit T 20 Torx Bit T 25 Torx Bit 003 1623 00 1 Spring removal tool 650 3620 00 Hardware kit 650 3616 00 Ca...

Page 139: ...and counter 436 0370 00 Waste ink tray 016 1368 00 A size paper 500 sheets 016 1369 00 A4 size paper 500 sheets 016 1724 00 Premium Transparency 50 sheets A size 016 1725 00 Premium Transparency 50 sheets A4 size 016 1720 00 Standard Transparency 50 sheets A size 016 1721 00 Standard Transparency 50 sheets A4 size 016 1194 00 A size transparency pockets 016 1130 00 A size transparency sleeves 016 ...

Page 140: ...Manual German 070 9103 40 Advanced Features and Troubleshooting Manual Spanish 070 9103 70 Advanced Features and Troubleshooting Manual Simplified Chinese 070 9103 80 Advanced Features and Troubleshooting Manual Traditional Chinese 070 9103 50 Advanced Features and Troubleshooting Manual Korean 070 9103 05 Advanced Features and Troubleshooting Manual Russian 063 3126 01 Adobe Type Manager CD SW 06...

Page 141: ...tes Russian 161 0066 00 Power cord Standard U S 115V 161 0066 09 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 Table 11 Supplies and accessories Parts Part number Serial number Effective Discont d Qty Name and description ...

Page 142: ...132 Phaser 840 Color Printer ...

Page 143: ...ive printhead can also cause uniformity problems particularly if the density difference is about 1 3 of an A size page wide Narrower density problems may be caused by a paper preheater Print Service Print 6 3 Weak jets or off axis jets Defective printhead Defective cap wipe purge system that is unable to clear a clogged jet Print Service Print 2 4 Wrinkling See Service Print 8 Causes Gaps could ei...

Page 144: ...that the printhead and drum thermals are correct A weak jet can also cause banding refer to the Weak missing Jets test print Make sure that the drum temperature sensor is correctly mounted and in proper even contact with the drum If necessary remove the sensor and check it for an accumulation of debris at its contact point As a last resort replace the printhead 1 2 3 4 6 7 8 9 10 11 12 13 14 15 16...

Page 145: ...stuvwxyz1234567890 8 point Times Roman ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz1234567890 6 point Times Roman ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz1234567890 5 point Times Roman ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz1234567890 4 point Times Roman ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz1234567890 10 point Times Roman ABCDEFGHIJKLMNOPQRSTUVWXYZab...

Page 146: ...agnostics to check the printhead and drum for good thermal regulation Also check the printhead to drum gap Ensure the drum fan is running properly A vertical band 1 5 page wide running the length of the page is caused by a stuck heating plate in the paper preheater Run the front panel cleaning procedure Clean Ink Smears which raises the temperature of the paper preheater and may free the stuck hea...

Page 147: ...t for wrinkling print the YMCKRGB prints in duplex mode at the standard resolution Causes Weak jets or uneven drum heating may cause uneven fills To solve wrinkling try different print media Replace the drum maintenance drawer to correct streaking Check the drum temperature sensor for debris build up on the sensor or the sensor is in improper contact with the drum Refer to the Reverse Text test pr...

Page 148: ...6 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 5 1 2 3 4 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74...

Page 149: ... and right ends of the print A difference indicates the printhead is misaligned Text Look for text that is fuzzy or text that differs in quality from one side of the print to the other Either conditions indicates the printhead to drum gap is incorrect Perform the procedure Printhead to drum spacing adjustment on page 66 0388 39 Time_to_Drum Head_to_Drum test print Short dashes above the line indic...

Page 150: ...scribed in Transfix roller pressure spring adjustment on page 72 As a last resort replace the drum transfix assembly 13 Red 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 m...

Page 151: ...d in Transfix roller pressure spring adjustment on page 72 As a last resort replace the drum transfix assembly 15 Blue 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 152: ...ibed in Transfix roller pressure spring adjustment on page 72 As a last resort replace the drum transfix assembly 17 Magenta 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 ...

Page 153: ...ng Check the drum temperature sensor for debris build up on the sensor Or the sensor is in improper contact with the drum 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 72 As a last resort replace the drum transfix assembly 19 Color Bands This print consists of sequen...

Page 154: ...144 Phaser 840 Color Printer ...

Page 155: ... paper tray 1 Size A A4 Empty Tray present Process Gear Position Sensor Drum home sensor Drum encoder sensor Upper feed roller clutch Drum maintenance cam clutch Pick clutch Preheater exit sensor Left I O board Handfeed sensor A size sensor A4 size sensor Preheat entry left edge sensor J 140 J 180 J 150 4 3 6 3 4 2 2 2 Drum temperature sensor 2 2 2 2 3 J 990 J 970 J 170 Right I O board Tray presen...

Page 156: ... printer wiring Incorrect wiring dressing can result in wires pinched by cabinet panels or damaged by moving parts of the printer Wire routing on the right side of the printer near right I O board Bundle vacuum hose through Tie wrap wiring harness cable restraint Tie wrap hose and wiring to corner of fan ...

Page 157: ...Service Guide 147 Wire dressing above the x axis drive The power wiring harness for the ink loader is routed through a cable strap located behind the vacuum pump module ...

Page 158: ...ch tie wrap s knot should be oriented inward so it does not rub against the printer cabinet panel Do not pinch the vacuum hose shut Vacuum hose dressing Orient knots in ties inward Bundle cap wipe purge wiring with hose Tie wrap cap wipe purge wiring harness to both ends of metal vacuum hose ...

Page 159: ...Service Guide 149 Routing wiring on the left side of the printer Wrap drum position sensor wiring harness around drum temperature sensor wiring harness Tie wrap to frame Tie wrap to bracket ...

Page 160: ...150 Phaser 840 Color Printer Wire dressing behind the printhead Printhead cable restraints Printhead ground lugs built into frame Maintenance tray counter sensor wiring harness restraint ...

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