Page 1 P H A S E R ® 7 8 0 C O L O R L A S E R P R I N T E R Servic e Qu ic k Re f e re n c e G u i d e Warning The following servicing instructions are for use by qualified service personnel only.
Page 2 © Copyright 1998 by Tektronix, Inc., Wilsonville, Oregon. Printed in the United States of America. All rights reserved. Contents of this publication may not be reproduced in any form without permission of Tektronix, Inc. ® ® ® Tektronix , Phaser...
Page 3: Users Safety Summary
Users safety summary Terms in CAUTION Conditions that can result in damage to the product. manual: 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 4 Symbols as marked on product: DANGER high voltage: Protective ground (earth) terminal: Use caution. Refer to the manual(s) for information: Laser 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.
Page 5 Service safety summary For qualiﬁed service personnel only: Refer also to the preceding Users Safety Summary. Do not service alone: Do not perform internal service or adjustment of this product unless another person capable of rendering ﬁrst aid or resuscitation is present. Use care when servicing with power on: Dangerous voltages may exist at several points in this product.
Page 7: Table Of Contents
Contents General Information Phaser 780 overview Memory considerations Print engine assemblies The image processor Front panel Rear panel Network card LEDs Specifications Regulatory specifications Safety Energy Star certification Error Codes and Messages Troubleshooting System power-up sequence Print engine troubleshooting Printer will not power up...
Page 8 Adjustments Printing test prints Print service test prints Printing the configuration page Printing the demonstration pages Print engine calibration Adjusting for impulse banding Cleaning and Maintenance Service preventive maintenance procedure Recommended tools Cleaning Resetting NVRAM viii Phaser 780 Color Printer...
Page 9 Key FRU Disassembly Paper feeder Feeder registration chute Feeder registration clutch Registration brake clutch Feeder metal registration roller Feeder rubber registration roller Feeder pre-registration clutch Feeder pre-registration rollers Paper-pick turn roller Paper feed drive gear train Paper-feed motor Multi-purpose tray roller assembly Multi-purpose tray pick rollers Auto-density calibration sensor Developer assembly...
Page 10 FRU List Supplies and accessories Test Prints Wiring Diagrams Phaser 780 Color Printer...
Page 11 Figures The Phaser 780 printer (shown with optional Lower Tray Assembly) 1 Internal features of the print engine 5 Circuit boards of the print engine 6 Motors of the print engine 7 Sensors and switches on the print engine 8...
Page 12 Wiring 1 – Low voltage power supply, laser unit, and interlock switches 201 Wiring 2 – Engine control board, auto-density calibration sensor, erase lamp, waste toner sensor 202 Wiring 3 – Low voltage power supply, engine control board, high-voltage power supply and imaging components 203 Phaser 780 Color Printer...
Page 13 Wiring 4 – Engine control board, used cartridge sensor, cartridge sensor, carousel sensor, developer clutch, developer fan, toner dispense motor 204 Wiring 5 – Engine control board, low voltage power supply, carousel motor board, rotary motor 205 Wiring 6 – Engine control board, low voltage power supply, bias transfer roller cam solenoid accumulator belt sensor, paper feeder motor, process motor 206 Wiring 7 –...
Page 14 Supplies and accessories 176 Plug/Jack Locations - 1 186 Plug/Jack Locations - 2 187 Plug/Jack Locations - 3 188 Plug/Jack Locations - 4 189 Plug/Jack Locations - 5 190 Plug/Jack Locations - 6 191 Plug/Jack Locations - 7 192 Phaser 780 Color Printer...
Page 15: General Information
Tektronix Phaser® 780 Color Printer. To ensure complete understanding of the product, we recommend participation in Phaser 780 service training, if available. 3041-01 The Phaser 780 printer (shown with optional Lower Tray Assembly) Service Guide...
Page 16: Phaser 780 Overview
600 x 600 dots-per-inch on A and B-size media. The base printer does not support grayscale printing. The Phaser 780 GN (Graphics) features 96 Mbytes of RAM and can print at 600 x 1200 dpi. It also contains 136 fonts. The graphics printers supports 16 level grayscale printing as well as printing oversize-B images.
Page 17: Memory Considerations
Memory considerations The base printer features 32 Mbytes of RAM in one connector and features two additional DIMM connectors which accept 16-, 32-, 64-, or 128 Mbytes RAM DIMMs. The printer can use any off-the-shelf RAM meeting these speciﬁcations: 168 pin DIMM Synchronous DRAM 3.3 volt 9 nsec speed...
Page 18 For example: Installed RAM: 96 Mbytes Mem slot 1: SDRAM/parity/64 MB/KMM366S824AT Mem slot 1: empty This is a list of DRAM SIMMs that are branded for use by Tektronix at the time this guide was published: Size Maker Part Number...
Page 19: Print Engine Assemblies
Print engine assemblies Developer Laser assemblies unit Carousel assembly Paper feeder Fuser Media tray 1 Multi-purpose tray Accumulator belt cleaner Imaging unit Second bias transfer roller Accumulator belt assembly 3041-02 Internal features of the print engine Service Guide...
Page 20: Circuit Boards Of The Print Engine
Image processor board Engine control board Carousel motor board Low Voltage Power Supply (LVPS) Network High Voltage card board 3041-04 Circuit boards of the print engine Phaser 780 Color Printer...
Page 21: Motors Of The Print Engine
Image processor Toner Process drive dispense assembly motor Developer fan Fuser fan Carousel motor Paper feed drive gear train Process Paper feed motor motor 3041-03 Motors of the print engine Service Guide...
Page 22: Sensors And Switches On The Print Engine
Edge Fuser sensor temperature sensor Multi-purpose tray paper present sensor Fuser exit sensor Long paper sensor Environment sensor Low paper sensor Registration Paper empty sensor sensor 3041-05 Sensors and switches on the print engine Phaser 780 Color Printer...
Page 23: Solenoids And Clutches On The Print Engine
Registration clutch Second bias transfer roller solenoid Developer clutch Pre-Registration clutch Registration Multi-purpose brake clutch pick-up solenoid Multi-purpose tray clutch 3041-06 Solenoids and clutches on the print engine Service Guide...
Page 24: The Image Processor
The image processor Real Time Clock / NVRAM SCSI DIMMS riser card NVRAM Network card Postscript Font code ROM DIMM Boot DIMM 3041-07 Features of the image processor board Phaser 780 Color Printer...
Page 25: Front Panel
Front panel These front panel features are found on the printer: A two-line, 40-character LCD Six push buttons Five LEDs LCD. The LCD serves two purposes: Displaying current image processor and print engine status information and displaying an interactive menu. Status information includes image processor status such as Ready, Processing and Printing.
Page 26: Rear Panel
100 MBS. Ethernet speed is 100 MBS when lit. Note Do not use both Ethernet connectors at the same time. With a Ethernet or Token Ring network card installed, the 10baseT port is disabled. Phaser 780 Color Printer...
Page 27: Printer Rear Panel With The Optional Ethernet Card
The Token Ring network card has two LED indicators: Connection (yellow); off when the printer is not inserted into the Token Ring, blinks while the printer is attempting to insert itself into the Token Ring, on when the printer is properly inserted in the ring. Ring Speed (green);...
Page 28: Specifications
Front feet less than 5 mm above or below rear feet Left feet less than 10 mm above or below right feet Mounting surface dimensions Level surface with dimensions of at least 79 cm (31 in.) by 152 cm (60 in.). Phaser 780 Color Printer...
Page 29 Table 4 Functional speciﬁcations Characteristic Speciﬁcation Printing process Electro-photographic, four color (CMYK), two transfer printing using modulated (on/off) laser beam scanning. Imaged is fused to paper using heat and pressure with silicone oil lubricant. Color medium Four toner cartridges each containing one of four colors: cyan, magenta, yellow or black.
Page 30 0.5 g, 25 minute sweep, 5-100 Hz, 100-200 sec/sweep cycles The printer may have any corner raised and dropped 5 cm (2 in.) Shock-non-operating without impairment of operation. Acoustic Noise Idle: 38.3 db Printing: 54.8 db with impulse noise of 63.3 db Phaser 780 Color Printer...
Page 31: Regulatory Specifications
Regulatory speciﬁcations Safety EN60950 CB Report by Third Party GOST and TUV certiﬁcation UL1950 Nationally Recognized Test Lab (NRTL) certiﬁed CSA 950 SCC recognized test lab certiﬁed EN55022 (CISPR 22) Class B EN50082-1:1994 Susceptibility EN61000-3-2 AC Mains Harmonic Distortion EN61000-3-3 AC Mains Voltage Flicker EN61000-4-2:1993 ESD EN61000-4-4:1993 Fast Burst Transients EN61000-4-5:1993 Line Surge...
Page 32 Phaser 780 Color Printer...
Page 33: Error Codes And Messages
Error Codes and Messages The following table list error codes and messages reported by the print engine control board. Error code Description Corrective action message Laser Unit There is a problem with the laser unit. Test the top cover and right front cover switches for Error The engine control board did not receive...
Page 34 Replace the engine control board Inspect the four developer housings. Each magnet roller should be evenly coated with toner. Replace a suspect developer assembly. Replace the imaging unit Replace the high voltage board Phaser 780 Color Printer...
Page 35 Error code Description Corrective action message Auto- There is problem with the auto-density Power cycle the printer Check the auto-density density calibration. The engine control board calibration sensor for Calibration detected that the auto-density contamination from toner. Error calibration sensor LED output signal is Replace the sensor, if (Error 13) below speciﬁed range.
Page 36 Check that time. the fuser heats up Check for line voltage at P/J 71 pins 1 and 2. If no voltage is present replace the power supply Replace the fuser Replace the engine control board Phaser 780 Color Printer...
Page 37 Error code Description Corrective action message Fuser There is a problem with the fuser. The Open the fuser door and ensure the fuser connectors Temperature engine control board senses an open are properly seated. Error temperature sensor circuit. Close the fuser and power (Error 42) cycle the printer.
Page 38 There is a CRU memory problem. The Power cycle the printer Replace the imaging unit with Count Error engine control board could not read the a new cartridge (Error 72) CRUM counter value. Replace the engine control board Phaser 780 Color Printer...
Page 39 Error code Description Corrective action message Imaging Unit The wrong imaging unit is installed in Power cycle the printer Replace the imaging unit with ID Error the printer. The engine control board a new cartridge (Error 73) detected that the installed imaging unit Replace the engine control is incompatible with the printer.
Page 40 Test the auto-density speciﬁcation and that the reading is calibration sensor either slow to raise or does not raise Replace the engine control after the printer attempts to increase board density. Phaser 780 Color Printer...
Page 41 Error code Description Corrective action message Replace Cyan image density is too low. The Replace the cyan toner cartridge Cyan Toner engine control board detected that the Test the toner/developer Cartridge auto-density calibration sensor reads dispense motor the cyan patch density as being below Test the auto-density speciﬁcation and that the reading is calibration sensor...
Page 42 Test the dispense motor on the Dispense Motor for more than Test the auto-density 1150 seconds in order to raise the calibration. Replace it, if image density to normal. necessary. Replace the engine control board Phaser 780 Color Printer...
Page 43 Error code Description Corrective action message Media Low in The engine control board detected that Add paper to tray 4 Check for a damaged or Tray 4 the tray 4 low paper sensor is actuated. missing sensor actuator. Replace the tray 4 low sensor Replace the engine control board Media Low in...
Page 44 The engine control board detected that Clear jammed paper from the printer A, B the registration sensor was actuated Test the feeder registration while the printer was in standby. exit sensor Replace the engine control board Phaser 780 Color Printer...
Page 45 Error code Description Corrective action message Clear Jam At There is a problem near the registration Clear jammed paper from the printer A, B sensor. The engine control board Check that the media tray detected that the registration sensor did and ensure it is correctly not actuate within the speciﬁed time loaded...
Page 46 Cartridge engine control board did not receive a Replace the cyan toner signal from the cartridge sensor when cartridge the carousel frame moved the cyan Replace the toner cartridge developer housing into position. presence sensor. Phaser 780 Color Printer...
Page 47 Error code Description Corrective action message Install The magenta toner cartridge is either Reseat the magenta toner cartridge. Power cycle the Magenta not installed or not installed correctly. printer Toner The engine control board did not receive Replace the magenta toner Cartridge a signal from the cartridge sensor when cartridge...
Page 48 Reseat the fuser oil roll Inspect the fuser roll contacts Roll the fuser oil roll assembly circuit is open. and connectors. Ensure they Cartridge are clean and seated correctly Replace the fuser roll Replace the engine control board Phaser 780 Color Printer...
Page 49 Error code Description Corrective action message Second Bias The engine control board detected that Power cycle the printer Replace the high voltage Transfer the measured current value across power supply Roller Error second bias transfer roller was not within Replace the engine control speciﬁcations.
Page 50 Replace if necessary Assembly deactuated. Replace the feeder control Cover board Inspect the lower feeder-to-printer connections at the rear of the printer Replace the feeder Replace the engine control board Phaser 780 Color Printer...
Page 51 Error code Description Corrective action message Close Left The engine control board detected that Reseat the fuser Inspect the fuser mating Fuser Unit the fuser interlock circuit is open. connectors for proper ﬁt Replace the engine control board Close Exit The engine control board detected that Close the exit cover Replace the exit chute switch...
Page 52 Error code Description Corrective action message Empty the The engine control board detected that Remove the prints from output tray Top Output the full stack sensor is actuated for more Inspect for damage the Tray than 12 seconds. output tray full sensor. Replace if necessary Replace the engine control board...
Page 53: Troubleshooting
Troubleshooting System power-up sequence The main power switch is turned on. (Or the front cover is opened and then closed or diagnostics are exited.) The print engine reads the Customer Replaceable Unit Memory (CRUM). The print engine determines that all the CRUs are in place, except for the toner cartridges.
Page 54: Print Engine Troubleshooting
Engine control board loading check Reconnect P32 and P33 to the low voltage power supply. Refer to “Wiring Diagrams” on page 185 and one by one disconnect components that are connected to the engine control board. Phaser 780 Color Printer...
Page 55: Erratic Printer Operation
Try printer from another application. Ensure that the host computer prints reliable to a different printer. Also try printing from another computer to the Phaser 780. Replace the interface cable connecting the host to the printer. Replace the engine control board.
Page 56: Making A Print Engine Only Test Print
Move the switch to the ON position. Turn on the printer. The printer generates test prints just as it does in the previous procedure. Switch off printer main power to stop generating test prints. Move the switch to the 1 position. Phaser 780 Color Printer...
Page 57: Printing And Print Quality Problems
Printing and print quality problems Initial checks and actions Does the printer display an error code? If so go to “Error Codes and Messages” on page 19. Is the AC power provided at the wall outlet within recommended speciﬁcations? Is the printer properly gounded through the AC wall outlet? Is the printer located in an area where the temperature and humidity are stable and within speciﬁcations? Is the printer located in an area free of dust?
Page 58: Light (Undertone) Prints
Is the image light when it exits the fuser? If yes, replace the oil roll cartridge. Generate a test print. Inspect the image on the sheet. Is the image density now normal as it exits the fuser? If not, replace the fuser. Phaser 780 Color Printer...
Page 59: Blank Prints
Blank prints The entire image area is blank. The printer displays no error code. Generate a test print. Is the test print blank? If no, reload the printer driver software or replace the image processor board. Remove the imaging unit. Inspect the empty imaging unit cavity for a sheet of paper that could be blocking the...
Page 60: Monochrome Prints
Manually actuate the cleaner cam solenoid and rotate the fuser input gear to cycle the cleaner cam through its cycle of operation. Does the cleaner cam operate the cleaner cam guides properly? If not, replace the fuser assembly. Replace the accumulator belt cleaner. Phaser 780 Color Printer...
Page 61: Black Prints
Black prints The entire image area is black. The printer displays no error code. Power cycle the printer, if an error 10 is detected replace the laser scanner unit. Replace the engine control board. Print Service Test Print 1. Is the test print completely black? If no, reload the printer driver software or replace the image processor...
Page 62: Missing Band In Direction Of Paper Travel
If no, replace the accumulator belt. Generate a test print and open the front cover just before the sheet of paper enters the fuser. Phaser 780 Color Printer...
Page 63: Missing Bands In Parallel To The Leading Edge
Inspect the image on the paper just before the paper enter the fuser. Is there a normal test print image, without any band deletions, visible on the sheet of paper? If not, replace the second bias transfer roller. Generate a test print and slide the fuser assembly out of the printer just as the sheet of paper exits the fuser.
Page 64 If not, replace the defective developer assembly. Replace the high voltage power supply. Replace each of the four developer assemblies, one at a time. Phaser 780 Color Printer...
Page 65: Streaks In Direction Of Paper Travel
Streaks in direction of paper travel There are dark lines running along Leading Edge the page in the direction of paper travel from the leading edge to the trailing edge (B-size print shown). The printer displays no error code. Note A-size prints are processed through the printer with the short edge of the print parallel to...
Page 66: Streaks Parallel With The Leading Edge
Is there a normal test print image on the sheet of paper before entering the fuser but the image has visible streaks after it exits the fuser? If yes, replace the fuser roll cartridge. If streaks continue to occur, replace the fuser. Phaser 780 Color Printer...
Page 67: Banding
Remove the top cover. Turn the carousel frame and inspect the magnet roller of each of the four developer assemblies. Do the magnet rollers of each developer assembly appear smooth, evenly formed, without any low spots, and without obvious contamination? If not, replace the defective developer assembly.
Page 68: Random Missing Spots
Turn the carousel frame and inspect the magnet roller of each of the four developer assemblies. Do the magnet rollers of each developer assembly appear smooth, evenly formed, without any low spots, and without obvious contamination? If not, replace the defective developer assembly. Phaser 780 Color Printer...
Page 69: Random Spotting
Random spotting 3041-47 There are spots of toner randomly scattered across the page. The printer displays no error code. Slide the paper feeder out of the printer and inspect the top of the registration chute assembly. Is the top of the registration chute assembly free of toner and foreign debris? If not, remove and inspect the waste toner cartridge.
Page 70: Repetitive Mark Appears On Each Print
3041-49 also cause ghosting.) If the customer is consistently printing 250 B-size (500 A-size) prints a day, recommend the Hi-Duty Fuser Roll Cartridge. If fuser damage is excessive, replace fuser and install Hi-duty Fuser Roll Cartridge. Phaser 780 Color Printer...
Page 71: Background Contamination
Replace the imaging unit. Excessive duplexing of the same image can cause ghost images on the imaging unit drum from fuser oil contamination. Inspect the image on the surface of the accumulator belt? Is there a normal test print image, without ghosts, visible on the surface of the accumulator belt? If a ghost is present, visually inspect the operation of the cleaner cam solenoid and the cleaner cam guides located on the fuser assembly.
Page 72: Unfused Image Or Image Easily Rubs Off Of Page
If not clean the paper feeder and its metal and rubber 3041-52 registration rollers. Generate a test print and open the front cover just before the sheet of paper reaches the fuser. Phaser 780 Color Printer...
Page 73: Print Is Mottled
Open the front cover and inspect the back of the sheet of paper. Is the back of the sheet clean and free of toner? If not, replace the second bias transfer roller and if necessary also replace the accumulator belt cleaner assembly.
Page 74: Image Mis-Registered On Paper
The printer displays no error code. Ensure the shipping blocks are removed from the paper feeder. Test the accumulator belt home sensor. Replace it if necessary. Replace the engine control board. Replace the image processor. Replace the accumulator belt assembly. 3041-55 Phaser 780 Color Printer...
Page 75: Color Representation Not Correct
Color representation not correct The color of the printed image is completely different than the computer image. The printer displays no error code. Ensure driver settings are correct. Reload the printer driver software. Clean and inspect the auto- density calibration sensor. Test the sensor using the printer’s built-in diagnostics.
Page 76: Random Spotting
As you manually rotate the paper feed motor place your ﬁnger inside the auger opening and feel the movement of the auger spring. Does the auger spring rotate when you manually rotate the paper feed motor? If not, replace the auger assembly. Replace the imaging unit. Phaser 780 Color Printer...
Page 77: Media Jams And The Paper Path
Media jams and the paper path Skewed image The image area is twisted or is not parallel with the sides of the page. The printer neither jams nor displays an error code. Check that the paper tray’s metal hooks (at the corners of the leading edge of the paper in the tray) are not bent or deformed.
Page 78: Damaged Prints
If no, clean or replace the lower exit assembly and the upper exit assembly. Is the sheet of paper undamaged until it reaches exit roller? If yes, replace exit roller. Phaser 780 Color Printer...
Page 79: Inoperative Lower Tray Feeder
Inoperative lower tray feeder The lower tray feeder does not work at all, the lower tray feeder does not attempt to feed paper, and the problem is not identiﬁed by a displayed error code. Ensure the printer driver is conﬁgured with the “optional trays” installed.
Page 80: Front Panel Indications
“Ready” mode without printing image. Power cycle the printer and print again. Make sure that the correct Phaser 780 printer icon was selected in the Chooser. Try printing the job again. In the Chooser or the print dialog, switch background printing to off. Try printing the job again.
Page 81: Image Is Rotated 90 Degrees
(CMY), blue is often printed as purple. To adjust blue from within Microsoft Windows: Within the Tektronix PostScript Windows driver you have an option, Vivid Color, that alters to blue colors that are appearing purple.
Page 82: Printing From Windows 3.1 Produces The Message "Problem Writing Device Lpt1: Cancel Or Retry
Use a text editor to open and examine the ﬁle. There is a utility ﬁle that you can use to tag or remove a CTRL-D to the end of a print ﬁle. TCP/IP and Novell protocols do not accept CTRL-D with the print ﬁles. Refer to the network user manual. Phaser 780 Color Printer...
Page 83: Running Built-In Diagnostics
Running built-in diagnostics The printer diagnostic interface consists of a front panel containing a 2 line by 40 character LCD display and six buttons. For diagnostics, the front panel switches are identiﬁed as 1 through 6 with switch 1 being the left-most switch and switch 6 being the right-most switch.
Page 84 New Oil Roller Switch Fuser Interlock Switch Fuser Entry Sensor Fuser Exit Sensor Front Cover Interlock Lower Feeder Interlock Tray 1 Present Indicates Missing or Size of media selection Tray 2 Present Tray 3 Present Tray 4 Present Phaser 780 Color Printer...
Page 85 Table 1 Diagnostic tests Test Sub-tests Detail Sensors (cont.) Tray 1 Low Sensor Tray 1 Empty Tray 2 Low Sensor Tray 2 Empty Tray 3 Low Sensor Tray 3 Empty Tray 4 Low Sensor Tray 4 Empty Auto-density Calibration Pass/Fail test of sensor Sensor and its wiper solenoid;...
Page 86 Fuser Oil Life Fuser Unit Life Reset Fuser Life Perform the appropriate reset function whenever Reset Bias Transfer one of these FRUs is Roller Life replaced to return that FRUs copy count to zero Reset Belt Cleaner Life Phaser 780 Color Printer...
Page 87: Adjustments
Adjustments This topic discusses using the front panel’s interactive mode to review and change the printer’s operation. It also contains the procedures to calibrate the printer after you replace key Field Replaceable Units and to evaluate the printer's functionality. Printing test prints The prints printed via the front panel the are generated by the image processor.
Page 88: Print Engine Calibration
Repeat the procedure from Step 5 until the rotation is about 2 mm. If rotation is not enough, use a smaller shim. Too much, use a larger shim. Repeat for each developer. Phaser 780 Color Printer...
Page 89: Adjusting For Impulse Banding
Developer Place mark on roller After carousel rotation white roller mark should move 2mm Install shim Lift up slightly to install shim Toner 3041-32 Adjusting for impulse banding Service Guide...
Page 90 Phaser 780 Color Printer...
Page 91: Cleaning And Maintenance
Cleaning and Maintenance Service preventive maintenance procedure Whenever you check, service, or repair a printer, you should perform the following procedures. Cleaning the printer, as outlined in the following steps, assures proper operation of the printer and reduces the probability of having to service the printer in the future.
Page 92: Cleaning
Vacuum loose toner out of the carousel assembly. Remove and clean the accumulator belt cleaner assembly. Removing the accumulator belt cleaner assembly is explained on the Phaser 780 Service CD-ROM. Once removed, gently vacuum the cleaner assembly using a vacuum with a brush attachment. Do not touch the cleaner blade with your hands nor bend or crease the ﬁlm seal.
Page 93: Resetting Nvram
Resetting NVRAM Resetting NVRAM returns all the image processor's NVRAM-stored parameters to their factory defaults except the print counts and the Adobe ﬁrmware serial number. Caution Resetting NVRAM will also reset the network card’s NVRAM. If possible, copy down all network parameters or print the Conﬁguration Page.
Page 94 Phaser 780 Color Printer...
Page 95: Key Fru Disassembly
This topic illustrates how to remove and replace key printer Field Replaceable Units (FRUs). Refer to the later topic “FRU List” on page 137 for a list of the printer’s FRUs. For more detailed removal/replacement procedures refer to the Phaser 780 Service CD-ROM. Service Guide...
Page 96: Paper Feeder
Push in on the rear rail latch as you slide the rear of the paper feeder out far enough to disengage the latch. Slide the paper feeder out of the printer. Reverse these steps to install the paper feeder. Rear latch Front latch 780-5-34 Removing the paper feeder Phaser 780 Color Printer...
Page 97: Feeder Registration Chute
Feeder registration chute Slide the paper feeder out of the printer. You do not need to remove the paper feeder. Remove the E-ring securing the rear arm of the registration chute to the paper feeder. Remove the screw securing the ground wire to the chute. Remove the wire.
Page 98: Feeder Registration Clutch
Remove the E-ring securing the registration clutch to the rear of the metal registration roller. Remove the registration clutch from the roller. Reverse these steps to install the registration clutch. Registration clutch Wiring harness 780-5-40 Removing the registration clutch Phaser 780 Color Printer...
Page 99: Registration Brake Clutch
Registration brake clutch Remove the paper feeder as described in “Paper feeder” on page 82. Turn the paper feeder over and disconnect the wiring harness from the registration brake clutch. Remove the three screws securing the registration brake clutch assembly to the side of the paper feeder. Remove the assembly. Remove the E-ring securing the registration brake clutch to the clutch shaft and remove the clutch.
Page 100: Feeder Metal Registration Roller
Reverse these steps to install the feeder metal registration roller. Metal registration roller Rear bearing Front bearing Out gear 780-5-41 Removing the metal registration roller Phaser 780 Color Printer...
Page 101: Feeder Rubber Registration Roller
Feeder rubber registration roller Remove the feeder metal registration roller. Remove the E-ring at the front of the rubber registration roller securing the gear to the roller. Remove the gear. Remove the E-ring securing the rear of the rubber registration roller to the paper feeder.
Page 102: Feeder Pre-Registration Clutch
Slide the feeder pre-registration gear off the shaft. Undress the J95 wiring harness and slide the feeder pre-registration clutch off the feeder pre-registration shaft. Pre-registration clutch Pre-registration gear Pre-registration P/J95 support Pre-registration gear assembly 780-5-39 Removing the feeder pre-registration clutch Phaser 780 Color Printer...
Page 103: Feeder Pre-Registration Rollers
Feeder pre-registration rollers Remove the feeder pre-registration clutch as explained in the previous procedure. Slide the blue feeder pre-registration knob off the feeder pre- registration shaft. Remove two screws securing the multi-purpose tray out holder to the paper feeder. Pull the holder away from the feeder. Remove the E-ring and front bearing securing the front of the feeder registration shaft to the paper feeder frame.
Page 104: Removing The Feeder Pre-Registration Roller
Front bearing Idler gear Pre-registration knob Out holder Pre-registration gear 2 Pre-registration roll shaft 780-5-38 Removing the feeder pre-registration roller Phaser 780 Color Printer...
Page 105: Paper-Pick Turn Roller
Paper-pick turn roller Remove Tray 1 from the printer. Remove the paper feeder. Remove the two screws securing the turn chute to the printer frame. Remove the turn chute. Remove the paper-pick turn chute. Remove the two screws securing the tray stopper to the printer frame. Remove the stopper.
Page 106: Paper Feed Drive Gear Train
Remove the two wire clamps from the paper-feed drive gear train. Reverse these steps to install the paper-feed drive gear train. Wire clip Wire clamps Paper feed drive gear train 780-5-73 Removing the paper-feed drive gear train Phaser 780 Color Printer...
Page 107: Paper-Feed Motor
Paper-feed motor Remove the rear cover. Disconnect the wiring harness from the paper-feed motor. Remove the four screws securing the paper-feed motor to the fuser drive gear train. Remove the motor. Remove the two motor supports. Reverse these steps to install the paper-feed motor. Paper feed motor Motor...
Page 108: Multi-Purpose Tray Roller Assembly
Remove the E-ring securing the front shaft bearing to the front of the multi-purpose tray. Slide the multi-purpose tray roller assembly out of the multi-purpose tray assembly. Lever stopper Pick up cam gear Rear bearing Pick-up gear Front bearing 780-5-27 Removing the multi-purpose tray roller assembly Phaser 780 Color Printer...
Page 109: Multi-Purpose Tray Pick Rollers
Multi-purpose tray pick rollers Note Replace the pick rollers as a set. Remove the multi-purpose tray top cover. Release the latch holding the front pick roller core to the pick up shaft and slide the core away from the front pick roller. Slide the front pick roller toward the front roller core, so the pick up roll clears the locking pin.
Page 110: Removing The Multi-Purpose Tray Pick Rollers
Reverse these steps to install the multi-purpose tray pick rollers. Note the arrows molded into the sides of the pick roller; ensure they are oriented the correct direction upon installation. Latch Pick-up rollers Printer front Front core rollers Rear core rollers 780-5-26 Removing the multi-purpose tray pick rollers Phaser 780 Color Printer...
Page 111: Auto-Density Calibration Sensor
Auto-density calibration sensor Caution Protect the accumulator belt with a sheet of paper. Remove the imaging unit. Remove the inner cover. Disconnect the wiring harness from the auto-density calibration sensor. Remove the E-ring securing the front of the auto-density calibration sensor to the front of the printer frame.
Page 112: Removing The Auto-Density Calibration Sensor
Rear cutout Auto-density calibration sensor 780-5-48 Removing the auto-density calibration sensor Phaser 780 Color Printer...
Page 113: Developer Assembly
Developer assembly Open the front cover. Remove the toner cartridge of the developer assembly to be removed. Remove the imaging unit. Remove the top cover and inner cover. Remove the screw securing the carousel latch to the front of the printer frame.
Page 114: Removing A Developer Assembly
Carousel latch Developer assembly Shoulder screw Remove shipping developer cover before installing new developer assembly 780-5-53 Removing a developer assembly Phaser 780 Color Printer...
Page 115: Developer Clutch
Developer clutch Remove the carousel motor board as described in “Carousel motor board” on page 108. Disconnect the wiring harness from the developer clutch. Remove the fuser drive train gear as described in “Fuser drive gear train” on page 126. Remove the four screws securing the developer clutch to the printer frame.
Page 116: Developer Tie Plate
Remove the two screws securing the developer tie plate to the front of the printer frame. Slide the tie plate up and out of the printer frame. Reverse these steps to install the developer tie plate. Phaser 780 Color Printer...
Page 117: Removing The Developer Tie Plate
Developer tie plate Wire clamp 780-5-82 Removing the developer tie plate Service Guide...
Page 118: Toner/Developer Dispense Motor
Disconnect the wiring harness from the toner/developer dispense motor. Note Install the motor using the two left-side mounting screw holes. Reverse these steps to install the toner/developer dispense motor. Wiring harness Toner / developer dispense motor 780-5-80 Removing the toner/developer dispense motor Phaser 780 Color Printer...
Page 119: Carousel Assembly
Carousel assembly Remove each developer assembly. Remove the knob screw. Remove the screw securing the knob in place. Release the knob latch by inserting a screwdriver blade through the slot in the front of the knob. Remove the carousel motor. Remove the toner/developer dispense motor.
Page 120: Removing The Carousel Assembly
Screw Carousel assembly Front bearing Rear bearing 780-5-54 Removing the carousel assembly Phaser 780 Color Printer...
Page 121: Carousel Motor
Carousel motor Remove the rear cover. Disconnect the wiring harness from the carousel motor. Remove the three screws securing the carousel motor to the printer frame. Remove the motor. Reverse these steps to install the carousel motor. Wiring harness Carousel motor 780-5-78 Removing the carousel motor Service Guide...
Page 122: Carousel Motor Board
Remove the wiring harnesses from the carousel motor board. Remove the screw securing the carousel motor board to the printer frame. Remove the board. Reverse these steps to install the carousel motor board. Wiring harness Carousel motor board 780-5-79 Removing the carousel motor board Phaser 780 Color Printer...
Page 123: Carousel Sensor
Carousel sensor Remove the developer fan duct. Remove the screw securing the carousel sensor plate to the printer frame. Remove the plate, along with the attached carousel sensor, from the frame. Disconnect the wiring harness from the carousel sensor. Squeeze the three latches securing the sensor to the plate and remove the sensor.
Page 124: Laser Unit
Carefully lift the laser unit off the printer frame. Reach under the unit and disconnect the wiring harness from the laser unit motor board. Remove the laser unit. Reverse these steps to install the laser unit. Phaser 780 Color Printer...
Page 125: Removing The Laser Unit
Laser cover Laser unit 780-5-47 Removing the laser unit Service Guide...
Page 126: Erase Lamp Rail Assembly
Be careful not to damage the accumulator belt underneath the erase lamp rail assembly. Lift the erase lamp rail assembly up through the top of the printer frame. Reverse these steps to install the erase lamp rail assembly. Phaser 780 Color Printer...
Page 127: Removing The Erase Lamp Rail Assembly
Disconnect wiring harnesses Wire clamps Erase lamp rail assembly 780-5-50 Removing the erase lamp rail assembly Service Guide...
Page 128: Erase Lamp
Release the three latches holding the erase lamp assembly to the erase lamp rail assembly. Remove the lamp. Reverse these steps to install the erase lamp. Erase lamp Erase lamp latch 780-5-49 Removing the erase lamp Phaser 780 Color Printer...
Page 129: Process Drive Unit
Process drive unit Remove the imaging unit. Remove the paper feeder. Remove the paper feeder drive assembly. Remove the erase lamp rail assembly. Disconnect the wiring harness leading to the process motor. Unhook the wires from the wire harness clip attached to the process drive unit. Remove the screw securing the high voltage power supply bracket.
Page 130: Removing The Process Drive Unit
Accumulator belt bracket Process drive unit High voltage power supply bracket Wiring harness 780-5-77 Removing the process drive unit Phaser 780 Color Printer...
Page 131: Waste Auger Assembly
Waste auger assembly Caution Be careful not to spill waste toner from the auger assembly. Vacuum the auger before removal. Remove the accumulator belt assembly. Remove second bias transfer roller assembly. Remove the paper-feed motor. Remove the fuser drive gear train to access the screw securing the plastic bracket holding the water auger housing.
Page 132: Removing The Waste Auger Assembly
Waste auger drive assembly Waste auger assembly 780-5-64 Removing the waste auger assembly Phaser 780 Color Printer...
Page 133: Accumulator Belt Assembly
Accumulator belt assembly Remove the high voltage power supply. Remove the erase lamp rail assembly. Remove the paper feeder. Remove the process drive unit. Remove the auto-density calibration sensor. Reach through the paper feeder cavity and disconnect the wiring harness from the accumulator belt sensor. Move the waste auger assembly for clearance.
Page 134: Removing The Accumulator Belt Assembly
Spring loaded collar Bearing fits in hole Accumulator belt assembly Accumulator belt assembly 780-5-59 Removing the accumulator belt assembly Phaser 780 Color Printer...
Page 135: Accumulator Belt Cleaner Assembly
Accumulator belt cleaner assembly Remove the fuser assembly as described in “Fuser assembly” on page 125. Open the front cover. Reach through the empty fuser cavity and hold the bottom of the belt cleaner assembly. Loosen the two screws securing the cleaner support to the printer frame.
Page 136: Second Bias Transfer Roller Assembly
Reverse these steps to install the second bias transfer roller assembly. Second bias transfer roller assembly 780-5-62 Removing the second bias transfer roller assembly Phaser 780 Color Printer...
Page 137: Second Bias Transfer Roller Cam Assembly
Second bias transfer roller cam assembly Remove the second bias transfer roller assembly as described in “Second bias transfer roller assembly” on page 122. Remove the second bias transfer roller cam assembly as described in “Second bias transfer roller cam assembly” on page 123. Remove the waste auger assembly as described in “Waste auger assembly”...
Page 138: Removing The Second Bias Transfer Roller Cam Assembly
Wiring harness Second bias transfer roller cam assembly 780-5-60 Removing the second bias transfer roller cam assembly Phaser 780 Color Printer...
Page 139: Fuser Assembly
Fuser assembly Turn off the printer and open the top media tray. Remove the screw securing the fuser assembly to the printer frame. Slide the fuser assembly a few inches out of the printer. Lift the end of the fuser assembly and pull the assembly out of the printer.
Page 140: Fuser Drive Gear Train
Remove the ﬁve screws securing the fuser-drive gear train to the printer frame. Remove the gear train. Reverse these steps to install the fuser drive gear train. Phaser 780 Color Printer...
Page 141: Removing The Fuser-Drive Gear Train
Fuser drive gear train E ring Paper feed motor bracket Auger assembly 780-5-74 Removing the fuser-drive gear train Service Guide...
Page 142: Lower Exit Assembly
Remove the wires from the wire clips that are molded into the side of the lower exit assembly. Reverse these steps to install the lower exit assembly. Phaser 780 Color Printer...
Page 143: Removing The Lower Exit Assembly
Lower exit assembly Wiring harness 780-5-68 Removing the lower exit assembly Service Guide...
Page 144: Full Stack Sensor
Squeeze the four latches securing the full stack sensor to the bracket. Disconnect the sensor’s connector P/J 167 Reverse these steps to install the full stack sensor. Full stack sensor 780-5-158 Removing the stack full sensor Phaser 780 Color Printer...
Page 145: Low Voltage Power Supply
Low voltage power supply Remove the rear cover. Disconnect the wiring harness from the top of the low voltage power supply. All the wiring harnesses plugs are held in place with locking levers. Disconnect the remaining wiring harnesses from the low voltage power supply.
Page 146: High Voltage Power Supply
Remove the four screws securing the high voltage power supply to the high voltage power supply brackets. Remove the high voltage power supply. Reverse these steps to install the high voltage power supply. High voltage power supply Wiring harness 780-5-84 Removing the high voltage power supply Phaser 780 Color Printer...
Page 147: Image Processor
Image processor Disconnect all interface cables connecting to the image processor. Remove the right cover. Disconnect all wiring harnesses from the image processor. Remove the 10 screws securing the image processor to the image processor chassis. Pull the image processor away from the chassis, disconnecting the image processor from the engine control board.
Page 148: Image Processor Chassis
Remove the chassis from the printer frame. Reverse these steps to install the image processor chassis. Image processor chassis Loosen these screws 780-5-91 Removing the image processor chassis Phaser 780 Color Printer...
Page 149: Print Engine Control Board
Print engine control board Perform the Life Date: Save Life Count described in “Running built-in diagnostics” on page 69 to save the information stored in the print engine control board NVRAM in the image processor board. Remove the image processor chassis. Disconnect the nine wiring harnesses connected to the print engine control board.
Page 150 Phaser 780 Color Printer...
Page 151: Fru List
FRU List This topic provides a list of ﬁeld replaceable units for the Phaser 780 Color Printer. Changes to Tektronix products are made to accommodate improved components as they become available. It is important when ordering parts to include the...
Page 152: Printer Cabinet Frus
Z780-5-119 Printer cabinet FRUs Phaser 780 Color Printer...
Page 153: Printer Cover Frus
Table 1 Printer cover FRUs Parts Part number Serial number Qty Name and description Effective Discont’d 118-9714-00 Front cover assembly kit Front cover Hinge plate Front cover strap Hardware 118-9733-00 Inner cover (includes 3a and 3b) 118-9715-00 Carousel latch kit Carousel latch lever Carousel latch spring Carousel latch assembly...
Page 154: Paper Feeder Frus
Z780-5-120 Paper feeder FRUs Phaser 780 Color Printer...
Page 155: Paper Feeder Frus
Table 2 Paper feeder FRUs Parts Part number Serial number Qty Name and description Effective Discont’d 118-9747-00 Size switch board 118-9742-00 Feed gear 118-9743-00 Feed spring 118-9744-00 Feed solenoid 118-9717-00 Paper pick rollers 118-9718-00 Turn roller assembly kit Turn gear pin Turn arm spring Turn rear bearing Turn assembly...
Page 156: Multi-Purpose Tray Cover Frus
780-5-121 Multi-purpose tray cover FRUs Phaser 780 Color Printer...
Page 157: Multi-Purpose Tray Cover Frus
Table 3 Multi-purpose tray cover FRUs Parts Part number Serial number Qty Name and description Effective Discont’d 118-9748-00 Multi-purpose tray left (front) cover 118-9749-00 Multi-purpose tray right (rear) cover 118-9751-00 Multi-purpose tray/extender 118-9750-00 Multi-purpose tray holder 118-9720-00 Multi-purpose tray assembly (items 1 thru 4) Service Guide...
Page 158: Multi-Purpose Tray Frus
780-5-122 Multi-purpose tray FRUs Phaser 780 Color Printer...
Page 159: Multi-Purpose Tray Frus
Table 4 Multi-purpose tray FRUs Parts Part number Serial number Qty Name and description Effective Discont’d 118-9763-00 Multi-purpose tray pad kit 118-9752-00 Multi-purpose tray edge sensor 118-9754-00 Multi-purpose tray paper sensor actuator 118-9827-00 Multi-purpose tray paper sensor 118-9756-00 Multi-purpose tray pick-up cam gear 118-9757-00 Multi-purpose tray cam gear spring 118-9758-00...
Page 160: Paper Feeder Cover Frus
780-5-123 Paper feeder cover FRUs Phaser 780 Color Printer...
Page 161: Paper Feeder Cover Frus
Table 5 Paper feeder cover FRUs Parts Part number Serial number Qty Name and description Effective Discont’d 118-9766-00 Paper feeder turn chute 118-9765-00 Paper feeder cover 118-9865-00 paper feeder assembly Service Guide...
Page 162: Paper Feeder Frus
780-5-124 Paper feeder FRUs Phaser 780 Color Printer...
Page 163: Paper Feeder Frus
Table 6 Paper feeder FRUs Parts Part number Serial number Qty Name and description Effective Discont’d 118-9771-00 Registration rubber roller 118-9768-00 Feeder pre-registration roller 118-9770-00 Registration clutch 118-9721-00 Registration spring kit Rear spring (black) Front spring (silver) 118-9769-00 Pre-registration clutch 118-9767-00 Pre-registration knob 118-9752-00...
Page 164: Imaging Frus
780-5-125 Imaging FRUs Phaser 780 Color Printer...
Page 165: Imaging Frus
Table 7 Imaging FRUs Parts Part number Serial number Qty Name and description Effective Discont’d 118-9774-00 Laser unit 118-9778-00 Erase lamp 118-9777-00 Auto-density calibration sensor assembly 118-9722-00 Bias charge roller connector kit with wiring harness 118-9779-00 Waste cartridge full sensor 118-9780-00 Waste cartridge installed sensor 118-9781-00...
Page 166: Developer Frus
780-5-126 Developer FRUs Phaser 780 Color Printer...
Page 167: Developer Frus
Table 8 Developer FRUs Parts Part number Serial number Qty Name and description Effective Discont’d 118-9782-00 Developer assembly, Black 118-9783-00 Developer assembly, Cyan 118-9784-00 Developer assembly, Magenta 118-9785-00 Developer assembly, Yellow 116-0073-00 Developer shim kit (1 each of 4 sizes) Service Guide...
Page 168: Carousel Frus
780-5-127 Carousel FRUs Phaser 780 Color Printer...
Page 169: Carousel Frus
Table 9 Carousel FRUs Parts Part number Serial number Qty Name and description Effective Discont’d 118-9787-00 Toner cartridge presence sensor 118-9724-00 Developer contact assembly 118-9820-00 Carousel knob 118-9723-00 Carousel assembly kit Carousel knob Carousel front bearing Carousel frame Carousel rear bearing 118-9788-00 New toner cartridge sensor 118-9786-00...
Page 170: Accumulator Belt Assembly Frus
780-5-128 Accumulator belt assembly FRUs Phaser 780 Color Printer...
Page 171: Accumulator Belt Assembly Frus
Table 10 Accumulator belt assembly FRUs Parts Part number Serial number Qty Name and description Effective Discont’d 118-9790-00 Tension lever 118-9726-00 Belt cleaning assembly kit Cleaner support assembly Belt cleaner 118-9791-00 Second bias transfer roller cam assembly 118-9789-00 Accumulator belt assembly 118-9793-00 Waste auger assembly 118-9792-00...
Page 172: Fuser Assembly Frus
780-5-129 Fuser assembly FRUs Phaser 780 Color Printer...
Page 173: Fuser Assembly Frus
Table 11 Fuser assembly FRUs Parts Part number Serial number Qty Name and description Effective Discont’d 118-9886-01 Fuser, 110 VAC 118-9887-01 Fuser, 220 VAC 016-1866-00 Fuser roll cartridge 118-9986-00 Fuser tray release lever 118-9727-00 Fuser assembly 110V 118-9728-00 Fuser assembly 220V Service Guide...
Page 174: Paper Exit Frus
780-5-130 Paper exit FRUs Phaser 780 Color Printer...
Page 175: Paper Exit Frus
Table 12 Paper exit FRUs Parts Part number Serial number Qty Name and description Effective Discont’d 118-9798-00 Lower exit assembly 118-9799-00 Upper exit assembly 118-9800-00 Exit tray assembly Service Guide...
Page 176: Paper Exit Frus
780-5-131 Paper exit FRUs Phaser 780 Color Printer...
Page 177: Paper Exit Frus
Table 13 Paper exit FRUs Parts Part number Serial number Qty Name and description Effective Discont’d 118-9729-00 Exit upper roller kit Exit idler gear Exit spur gear Exit rear bearing Exit-3 roller Exit front bearing Exit-2 roller 118-9802-00 Exit door switch 118-9801-00 Media exit sensor with ﬂag 118-9803-00...
Page 178: Drive Frus
780-5-132 Drive FRUs Phaser 780 Color Printer...
Page 179: Drive Frus
Table 14 Drive FRUs Parts Part number Serial number Qty Name and description Effective Discont’d 118-9804-00 Paper feed drive assembly 118-9806-00 Process drive assembly Process motor (part of process drive assembly) 118-9809-00 Carousel motor board 118-9810-00 Toner/developer dispense motor 118-9811-00 Developer clutch 118-9730-00 Paper feed motor assembly kit...
Page 180: Electronic (Rear) Frus
Part of Carousel FRU Part 2 Part of Imaging FRU Part 4 780-5-133 Electronic (rear) FRUs Phaser 780 Color Printer...
Page 181: Electronic (Rear) Frus
Table 15 Electronic (rear) FRUs Parts Part number Serial number Qty Name and description Effective Discont’d 118-9873-00 High voltage power supply board 118-9731-00 Developer fan kit Developer fan Developer fan duct 118-9816-00 Top cover switch 118-9817-00 Fuser connector, Main 119-5871-00 Low voltage power supply, 110 VAC 119-5872-00 Low voltage power supply, 220 VAC...
Page 182: Electronics (Front) Frus
780-5-134 Electronics (front) FRUs Phaser 780 Color Printer...
Page 183: Electronic (Front) Frus
Table 16 Electronic (front) FRUs Parts Part number Serial number Qty Name and description Effective Discont’d 118-9822-00 Front cover switch, right 118-9821-00 Front cover switch, left 118-9815-00 Exit connector-8 118-9814-00 Exit connector -4 118-9824-00 Video harness 118-9825-00 Laser unit harness 118-9796-00 Engine control board 118-9823-00...
Page 184: Image Processor Frus
780-5-135 Image processor FRUs Phaser 780 Color Printer...
Page 185: Image Processor Frus
Table 17 Image processor FRUs Parts Part number Serial number Qty Name and description Effective Discont’d 118-9826-00 Image processor fan 118-9885-00 Front panel harness 671-4303-80 Image processor board 156-4759-00 RAM DIMM, 32 Mbytes 156-4765-00 RAM DIMM, 64 Mbyte 156-4780-00 RAM DIMM, 128 Mbyte 671-4759-00 Font ROM SIMM, Kanji 671-4687-00...
Page 186: Optional Lower Feeder Cabinet Frus
780-5-136 Optional lower feeder cabinet FRUs Phaser 780 Color Printer...
Page 187: Optional Lower Feeder Cabinet Frus
Table 18 Optional lower feeder cabinet FRUs Parts Part number Serial number Qty Name and description Effective Discont’d 118-9923-00 Lower feeder front cover 118-9926-00 Lower feeder left cover 118-9924-00 Lower feeder rear cover 118-9925-00 Lower feeder harness cover 118-9928-00 Lower feeder chute assembly 118-9929-00 Lower feeder chute support 118-9927-00...
Page 188: Optional Feeder Frus
10: Items 1 thru 9 780-5-137 Optional Feeder FRUs Phaser 780 Color Printer...
Page 189: Optional Feeder Frus
Table 19 Optional feeder FRUs Parts Part number Serial number Qty Name and description Effective Discont’d 118-9931-00 Lower feeder assembly 118-9934-00 Lower feeder gear assembly 118-9933-00 Lower feeder motor 118-9936-00 Lower feeder interface harness 118-9935-00 Lower feeder circuit board 118-9747-00 Lower feeder paper size sensor 118-9932-00 Lower feeder turn-in chute...
Page 190: Supplies And Accessories
CD, ROM, French 063-3039-20 CD, ROM, Italian 063-3039-30 CD, ROM, German 063-3039-40 CD, ROM, Spanish 063-3039-70 CD, ROM, Simpliﬁed Chinese 063-3039-80 CD, ROM, Traditional Chinese 063-3039-90 CD, ROM, Korean 063-3040-00 User Guide, English 063-3040-10 User Guide, French Phaser 780 Color Printer...
Page 191 Table 20 Supplies and accessories Parts Part number Serial number Qty Name and description Effective Discont’d 063-3040-20 User Guide, Italian 063-3040-30 User Guide, German 063-3040-40 User Guide, Spanish 063-3040-05 User Guide, Russian 063-3041-00 Quick Reference Guide, Service 063-3094-00 Setup Guide, English 063-3094-10 Setup Guide, French 063-3094-20...
Page 192 Recycle kit for developer assemblies, California only 003-1496-00 Vacuum cleaner, 110/115 VAC 003-1497-00 Vacuum cleaner, 220/240 VAC 003-1498-00 Vacuum cleaner ﬁlter, Type 2, 3M 004-4845-00 Shipping Box 003-0602-00 #1 Pozidrive screwdriver tip 006-7971-00 Imaging unit lightshield Phaser 780 Color Printer...
Page 193: Test Prints
Test Prints This topic illustrates the test prints produced by the print engine. It also illustrates a number of defective prints and the reason for the defects. The topic “Printing and print quality problems” on page 43 discusses solutions to the problems shown in this appendix.
Page 194 Side edge. The value measure from the side edge to the center should be 148.5 mm (+/-2.5 mm). (When the print is accurately folded in half lengthwise, the center line should be in the center of the crease.) TRAIL EDGE 3041-35 Phaser 780 Color Printer...
Page 195 Interpreting Service Print 4 Service print 2 should always be printed on B-size paper. The print reveals repeating defects that can be traced back to defects on the printers belts, drum or rollers. Look for repeating defects inline down the print. Refer to the topic “Repetitive mark appears on each print”...
Page 196 Refer to the topic “Printing and print quality problems” on page 43 for solution to any print problems detected. Look for voids, repeating spots and banding. This solid ﬁll is also useful for ﬂushing out defective cyan toner. Phaser 780 Color Printer...
Page 197 Interpreting Sevice Print 8: Black Calibration Page Service print 8 is a 100% black solid ﬁll. Refer to the topic “Printing and print quality problems” on page 43 for solution to any print problems detected. Look for voids, repeating spots and banding. This solid ﬁll is also useful for ﬂushing out defective black toner.
Page 198 Phaser 780 Color Printer...
Page 199: Print Engine Wiring Diagram
Wiring Diagrams J 42 HIGH VOLTAGE POWER SUPPLY J 16 J 41 LOW VOLTAGE J 35 POWER SUPPLY J 32 J 33 (BCR) BIAS CHARGE ROLLER J 79 J 195 J 196 SECOND J 21 J 12 J 97 J 191 J 192 J 193 J 194 J 70 RIGHT J 72...
Page 200: Plug/Jack Locations - 1
Low voltage power supply P/J32 Map 6-C609 High voltage power supply Engine control board P/J16 49 CN1 Map 6-E609 Paper feed Motor Low voltage power supply P/J32 50 CN2 Map 6-608 Paper feed Motor Engine control board P/J17 Phaser 780 Color Printer...
Page 201: Plug/Jack Locations - 2
Plug/Jack Locations - 2 Map & Coordinates Connected to... Other end connected to... Map 6-E609 Mounted on Paper feed motor board Map 6-E608 Mounted on Paper feed motor board Map 6-D608 Process Motor Low voltage power supply P/J32 Map 6-D607 Process Motor Engine control board P/J17 Map 7-E708...
Page 202: Plug/Jack Locations - 3
Map 1-I105 Erase lamp P/J86A Map 1-I105 P/J86A Engine control board P/J17 Map 5-I506 Used cartridge sensor Engine control board P/J17 Map 1-F106 Waste toner sensor P/J116 Map 8-D805 Cartridge sensor P/J168 P/J89A Map 8-D805 P/J89 P/J161B Phaser 780 Color Printer...
Page 203: Plug/Jack Locations - 4
Plug/Jack Locations - 4 Map & Coordinates Connected to... Other end connected to... Map 4-G409 P/J90B Paper feeder P/J91 Map 4-G409 P/J90A Loop Map 2-D211 Paper feeder Engine control board P/J20 Map 4-E408 Map 4-E409 Multi-purpose tray assembly P/J92B Paper feeder P/J91 Map 4-E409 Multi-purpose tray assembly Paper feeder P/J92A...
Page 204: Fuser Fan
131A Map 6-B610 Option connection not on schematic Map 6-B610 Option connection not on schematic 132A Map 6-B610 Option connection not on schematic 161A Map 7-G707 P/J161B Engine control board P/J17 Map 8-D805 Phaser 780 Color Printer...
Page 205: Plug/Jack Locations - 6
Plug/Jack Locations - 6 Map & Coordinates Connected to... Other end connected to... 161B Map 8-D805 P/J161A Top Exit sensor P/J165 Exit Chute switch P/J166 163A Map 7-G707 P/J163B Engine control board P/J17 Map 8-D805 163B Map 8-D805 P/J163A Full Stack sensor P/J167 Map 8-F804 Top exit sensor P/J161B...
Page 206: Plug/Jack Locations - 7
Map 5-E510 Second bias transfer roller contact plate Map 8-I806 Not on schematic Map 3-F306 Image processor board Front panel P/J317 Map 3-G306 Image processor board Image processor fan Map 3-C306 Front panel Image processor board P/J314 Phaser 780 Color Printer...
Page 207: Map 1 - Wiring Routing At The Top And Front Of The Printer
The following illustrations detail the proper means of routing and dressing printer wiring. Incorrect wiring dressing can result in wires pinched by cabinet panels or damaged by moving parts of the printer. 83, 83A 116, 116A 86, 86A F422 84, 84A 81, 81A 3041-10 Map 1 –...
Page 208: Map 2 - Wire Routing Around The Engine Control Board
22, 22A 105, 105A 103, 103A 106, 106A 101, 101A 104, 104A 3041-11 Map 2 – Wire routing around the engine control board Phaser 780 Color Printer...
Page 209: Map 3 - Wiring Routing Around The Image Processor Board
3041-12 Map 3 – Wiring routing around the image processor board Service Guide...
Page 210: Map 4 - Wiring Routing Around The Paper Feeder
94, 94A 110A, 110B 95, 95A 201A, 201B 202A, 202B 109, 109A 113A, 113B 92A, 92B 90A, 90B 3041-13 Map 4 – Wiring routing around the paper feeder Phaser 780 Color Printer...
Page 211: Map 5 - Wire Routing Around The Laser Scanner And High Voltage Power Supply
197, 197A F421 F423 3041-14 Map 5 – Wire routing around the laser scanner and high voltage power supply Service Guide...
Page 212: Map 6 - Wire Routing At The Rear Of The Printer
195, 195A 82, 82A (CN4) 132, 132A 50(CN2) 131, 131A 49(CN1) 103A (CN3) 3041-15 Map 6 – Wire routing at the rear of the printer Phaser 780 Color Printer...
Page 213: Map 7 - Wire Routing Around The Power Supply
161A 163A 111A 63, 63A 56.56A 71, 71A 3041-16 Map 7 – Wire routing around the power supply Service Guide...
Page 214: Map 8 - Wire Routing Around The Fuser
161A, 161B 163A, 163B F791 77, 77A 111A, 111B 62, 62A 80, 80A 78A, 72A, 72B 69A, 76, 76A 3041-17 Map 8 – Wire routing around the fuser Phaser 780 Color Printer...
Page 215: Wiring 1 - Low Voltage Power Supply, Laser Unit, And Interlock Switches
ENGINE LOW VOLTAGE POWER SUPPLY CONTROL BOARD PAPER FEEDER LASER UNIT 3041-19 Wiring 1 – Low voltage power supply, laser unit, and interlock switches Service Guide...
Page 216: Wiring 2 - Engine Control Board, Auto-Density Calibration Sensor, Erase Lamp, Waste
3041-20 Wiring 2 – Engine control board, auto-density calibration sensor, erase lamp, waste toner sensor Phaser 780 Color Printer...
Page 217: Wiring 3 - Low Voltage Power Supply, Engine Control Board, High-Voltage Power Supply And Imaging Components
ENGINE HIGH VOLTAGE POWER SUPPLY CONTROL BOARD VOLTAGE POWER SUPPLY BIAS 2ND BIAS TRANSFER CHARGE ROLLER CAM ASSY FIRST ROLLER BIAS TRANSFER CONNECTOR ROLLER ASSY BIAS PLATE FIRST BIAS TRANSFER DEVELOPER ASSY ROLLER ACCUMULATOR BELT ASSY SECOND SECOND BIAS BIAS TRANSFER TRANSFER ROLLER...
Page 218: Wiring 4 - Engine Control Board, Used Cartridge Sensor, Cartridge Sensor, Carousel Sensor, Developer Clutch, Developer Fan, Toner Dispense Motor
CAROUSEL SENSOR CAROUSEL HOME SENSED(H) 5VDC TONER DISPENSE MOTOR ASSY TONER DISPENSE MOTOR ON(L) 24VDC 3041-22 Wiring 4 – Engine control board, used cartridge sensor, cartridge sensor, carousel sensor, developer clutch, developer fan, toner dispense motor Phaser 780 Color Printer...
Page 219: Wiring 5 - Engine Control Board, Low Voltage Power Supply, Carousel Motor Board
ENGINE CAROUSEL MOTOR CONTROL BOARD CAROUSEL MOTOR BOARD ASSY CAROUSEL MOTOR HOLD (L) 5VDC CAROUSEL MOTOR ON (L) 5VDC CAROUSEL MOTOR CLOCK LOW VOLTAGE POWER SUPPLY 3041-23 Wiring 5 – Engine control board, low voltage power supply, carousel motor board, rotary motor Service Guide...
Page 220: Wiring 6 - Engine Control Board, Low Voltage Power Supply, Bias Transfer Roller Cam Solenoid Accumulator Belt Sensor, Paper Feeder Motor, Process Motor
BIAS TRANSFER ROLLER CAM SOLENOID BOARD ACCUMULATOR SENSOR PAPER FEEDER LOW VOLTAGE POWER SUPPLY 3041-24 Wiring 6 – Engine control board, low voltage power supply, bias transfer roller cam solenoid accumulator belt sensor, paper feeder motor, process motor Phaser 780 Color Printer...
Page 221: Wiring 7 - Engine Control Board, Low Voltage Power Supply, Fuser, Oil Roll Assembly
LOW VOLTAGE POWER SUPPLY PRESSURE HEAT ROLLER ROLLER ENGINE CONTROL BOARD 3041-25 Wiring 7 – Engine control board, low voltage power supply, fuser, oil roll assembly Service Guide...
Page 222: Wiring 8 - Engine Control Board, Fuser Assembly, Environment Sensor
ENGINE CONTROL BOARD 3041-26 Wiring 8 – Engine control board, fuser assembly, environment sensor Phaser 780 Color Printer...
Page 223: Wiring 9 - Engine Control Board, Paper Size Switch Board, Feed Solenoid, No Paper Sensor, Low Paper Sensor
ENGINE PAPER SIZE SWITCH CONTROL ASSY BOARD 3041-27 Wiring 9 – Engine control board, paper size switch board, feed solenoid, no paper sensor, low paper sensor Service Guide...
Page 224: Wiring 10 - Engine Control Board, Paper Feeder
ENGINE CONTROL PAPER FEEDER BOARD FRONT TRANSPARENCY SENSOR REAR TRANSPARENCY SENSOR 3041-28 Wiring 10 – Engine control board, paper feeder Phaser 780 Color Printer...
Page 225: Wiring 11 - Engine Control Board, Paper Feeder, Multi-Purpose Tray
PAPER FEEDER MULTI-PURPOSE TRAY MULTI-PURPOSE TRAY EDGE SENSOR ENGINE CONTROL BOARD MULTI-PURPOSE TRAY EDGE PAPER SENSED (L) 5VDC MULTI-PURPOSE TRAY OHP SENSED (L) 5VDC MULTI-PURPOSE MULTI-PURPOSE TRAY TRAY OHP SENSOR LONG PAPER SENSED (L) 5VDC MULTI-PURPOSE TRAY LONG N/P SENSOR MULTI-PURPOSE TRAY SHORT N/P SENSOR MULTI-PURPOSE TRAY...
Page 226: Wiring 12 - Engine Control Board, Top Exit Sensor, Media Exit Switch, Full Stack Sensor
ENGINE CONTROL BOARD MEDIA EXIT SWITCH ON (L) 5VDC 3041-30 Wiring 12 – Engine control board, top exit sensor, media exit switch, full stack sensor, fuser fan Phaser 780 Color Printer...
Page 227: Wiring 13 - Engine Control Board, Image Processor Board, Front Panel, Image Processor
ENGINE CONTROL BOARD IMAGE PROCESSOR BOARD IMAGE PROCESSOR FAN FRONT PANEL 3041-31 Wiring 13 – Engine control board, image processor board, front panel, image processor fan Service Guide...
Page 228: Wiring 14 - Lower Tray Assembly Master Wiring Diagram
BOARD 1 BOARD 2 BOARD 4 BOARD 3 3041-59 Wiring 14 – Lower Tray Assembly master wiring diagram Phaser 780 Color Printer...
Page 229: Wiring 15 - Engine Control Board And Low Voltage Power Supply To Lower Tray
3041-60 Wiring 15 – Engine control board and low voltage power supply to Lower Tray Assembly feeder board Service Guide...
Page 230: Wiring 16 - Lower Tray Assembly Feeder Board To Feeder Chute Switch, Size Switches
3041-61 Wiring 16 – Lower Tray Assembly feeder board to feeder chute switch, size switches and feeder motor Phaser 780 Color Printer...
Page 231: Wiring 17 - Lower Tray Assembly Feeder Board To No Paper Sensors And Low Paper
3041-62 Wiring 17 – Lower Tray Assembly feeder board to no paper sensors and low paper sensors Service Guide...
Page 232: Wiring 18 - Lower Tray Assembly Feeder Board To Feed Solenoids And Turn Chutes
3041-63 Wiring 18 – Lower Tray Assembly feeder board to feed solenoids and turn chutes Phaser 780 Color Printer...
Page 233 Service Guide...
Page 234 Phaser 780 Color Printer...

Tektronix PHASER 780 Service Quick Reference Manual

General Information

Error Codes and Messages

Troubleshooting

Adjustments

Cleaning and Maintenance

Resetting NVRAM

Key FRU Disassembly

Quick Links

Troubleshooting

Related Manuals for Tektronix PHASER 780

Summary of Contents for Tektronix PHASER 780