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Xerox 4400DT - Phaser B/W Laser Printer, Service Manual, Page: 72 / 503

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Xerox 4400DT - Phaser B/W Laser Printer Service Manual Download Page 72

Phaser 4400 Laser Printer Service Manual 

2-35

Toner is Low.

(J5: Toner Low)

The Print Cartridge is almost empty.

Print Cartridge Low Toner Troubleshooting Procedure

Step Actions and Questions

Yes

No

1

Install a new Print Cartridge.

Does the Replace Print Cartridge message still 

appear?

Go to step 2.

Problem 
solved.

2

1. Remove the Front Cover (RRP 1.6 on 

page 6-11

) and 

the Left Front Cover (RRP 1.7 on 

page 6-12

). 

2. Cheat the Front Cover Interlock Switch. 

3. On the Connector PWB, check the voltage between 

P/J42 pin 4 and frame ground.

Is the voltage 0.0 VDC with the print cartridge 

installed and +3.3 VDC with the print cartridge 

removed?

Go to step 5.

Go to step 3.

3

Check the voltage between P/J42 pin 3 and pin 1. 

Is the v24 VDC?

Replace the 
Toner Sensor 
(RRP 5.2 on 

page 6-59

).

Go to step 4.

4

On the Connector PWB, check the voltage between 
P/J231 pin 11 and pin 12.

Is the v24 VDC?

Replace the 
Connector 
PWB (RRP 
9.7 on 

page 6-94

).

Check the 
Connector 
Harness 
Assembly. If 
OK, replace 
the Engine 
Logic Board 
(RRP 9.3 on 

page 6-89

).

5

On the connector PWB, check the voltage between 
P/J231 pin 9 and frame ground.

Is the voltage 0.0 VDC with the print cartridge 

installed and +3.3 VDC with the print cartridge 

removed?

Check the 
Connector 
Harness 
Assembly. If 
OK, replace 
the Engine 
Logic Board 
(RRP 9.3 on 

page 6-89

).

Replace the 
Connector 
PWB (RRP 
9.7 on 

page 6-94

).

Summary of Contents for 4400DT - Phaser B/W Laser Printer

Page 1: ...Service Manual P h a s e r L a s e r P r i n t e r 4400...

Page 2: ......

Page 3: ...by qualified service personnel only To avoid personal injury do not perform any servicing other than that contained in the operating instructions unless you are qualified to do so First Printing June...

Page 4: ...ion related to a specific subject or add a comment on the results achieved through a previous action Caution A CAUTION indicates an operating or maintenance procedure practice or condition that if not...

Page 5: ...ace on or in the printer Use caution to avoid personal injury The surface is hot while the printer is running After turning off the power wait 30 minutes Avoid pinching fingers in the printer Use caut...

Page 6: ...a properly grounded outlet If the product loses its ground connection contact with conductive parts may cause an electrical shock Disconnecting Power Warning Turning the power OFF using the On Off sw...

Page 7: ...move the wrist strap before applying power to the unit under test to avoid potential shock After removing a static sensitive assembly from its anti static bag place it on a grounded conductive surface...

Page 8: ...n either supply conductor and ground A protective ground connection by way of the grounding conductor in the power cord is essential for safe operation Warning Labels Read and obey all posted warning...

Page 9: ...s easily accessible during servicing so that you may power down the printer during an emergency Warning Do not touch any electrical component unless you are instructed to do so by a service procedure...

Page 10: ...sure compliance use shielded interface cables A shielded parallel cable can be purchased directly from Xerox at www xerox com officeprinting 6200supplies Xerox has tested this product to international...

Page 11: ...ipment input current less than or equal to 16A per phase EN61000 3 3 1995 IEC61000 3 3 Part 3 Limits Section 3 Limitation of voltage fluctuations and flicker in low voltage supply systems for equipmen...

Page 12: ...0 02 ppm of ozone density TWA Time Weight Average measured according to ECMA 129 standard Other standards 100 V 120 V type satisfies UL 1950 3rd Edition CSA C22 2 no 950 M95 or equivalent NOM 200 V 2...

Page 13: ...xii Phaser 4400 Laser Printer Service Manual...

Page 14: ...des 2 1 Section Contents 2 1 Introduction 2 1 Service Diagnostics 2 7 Printer Error Messages 2 11 Image Processor POST Error Codes 2 58 Troubleshooting 3 1 Section Contents 3 1 Introduction 3 1 Measur...

Page 15: ...Assembly and Fuser 6 65 Xerographics 6 79 Main Drive 6 84 Electrical 6 87 Stacker 6 101 Optional Paper Feeder 6 120 Duplex Unit 6 141 Envelope Feeder 6 157 Parts Lists 7 1 Parts List Index 7 1 Using t...

Page 16: ...8 26 Erase Cycle 8 28 Fan Control 8 28 Duplex Printing 8 29 Envelope Feeder 8 33 Stacker 8 37 Option Feeder Assembly 8 42 Wiring Data 9 1 Section Contents 9 1 Introduction 9 2 Base Engine Wiring Data...

Page 17: ...xvi Phaser 4400 Laser Printer Service Manual...

Page 18: ...r 4400 Laser Printer Overview 1 2 Configurations 1 2 Printer Memory Configuration 1 3 Monitoring Consumables 1 3 Repackaging Information 1 3 Parts of the Printer 1 4 Base Configuration Components 1 4...

Page 19: ...a 64 Mbyte DIMM installed In order to get the full 64 Mbytes of memory to be reported as well as activate other features users need to upgrade to the N configuration with a Configuration Upgrade Kit...

Page 20: ...y does not meet the following specifications it is ignored by the printer PC133 DRAM Standard 144 Pin SODIMM Serial Presence Detect 3 3 Volt Monitoring Consumables The status of printer consumables is...

Page 21: ...guration components Internal components Printer options Base Configuration Components Front view of base configuration No Description 1 Paper exit slot 2 Standard Output Tray 3 Front panel 4 Front cov...

Page 22: ...5 Rear view of base configuration No Description 1 Option Cover 2 Rear cover release 3 Rear cover shown closed 4 Parallel connector 5 USB connector 6 Ethernet connector 7 Power cord receptacle 8 Left...

Page 23: ...04703 Configuration Upgrade Chip upgrades a Base printer to a Network printer 20 Gbyte Hard Drive 97S02917 Adds hard disk capability to the printer Stores fonts forms etc Enables collation proof secur...

Page 24: ...0 Laser Printer Service Manual 1 7 Printer options No Description 1 500 Sheet Stacker 2 Envelope feeder 3 550 sheet feeder with tray 2 4 550 sheet feeder with tray 3 5 Automatic duplex unit 1 2 3 4 s4...

Page 25: ...or red and can be off blinking or steady LED indications Green Ready to Print Flashing Green Receiving Processing Data or Printing Flashing Yellow Warning Flashing Red Error blinks in unison with Imag...

Page 26: ...nt Panel Shortcuts Mode Press this selection at power on Skip execution of POST diagnostics OK Print Service Menu Map INFO Reset PostScript NVRAM BACK OK When Password appears press UP DOWN keys withi...

Page 27: ...n replacing the Image Processor Board Inside the printer on the Image Processor board are four LEDs shown in the figure DS210 illuminates when the e net rate is set to 10 Mbits sec off indicates 100 M...

Page 28: ...P switches should be left in the Normal operating mode The DIP switches are defined as follows Switches 1 2 select the modes of operation as follows Switch 3 selects whether the rear panel serial port...

Page 29: ...1 12 Phaser 4400 Laser Printer Service Manual Machine Orientation For servicing the Phaser 4400 Laser Printer all references to machine orientation are as illustrated below Machine Orientation...

Page 30: ...he order of menus items and values found in the Menu Map is the order in which the menus items and values are displayed when scrolling through the menu items Menus and items in this map marked with a...

Page 31: ...Size and weight not including the Print Cartridge Image Processor Board or any options Width 422 mm x Depth 439 mm x Height 413 mm 16 5 in x 17 25 in x 16 25 in Weight 25 Kg 55 lbs Packaged Weight 32...

Page 32: ...e size of paper also specify the size on the front panel Supported paper and paper sizes Paper Type Envelopes Monarch 3 87 x 7 5 in C5 162 x 229 mm Transparencies Letter 8 5 x 11 in A4 210 x 297 mm Ca...

Page 33: ...paper envelopes Do not use envelopes with windows or metal clasps Label media should be fanned prior to loading Do not print to label stock once a label has been removed Simplex Duplex two sided 550 S...

Page 34: ...11 in 3R721 Xerox 4024 DP folio Folio 8 5 x 13 in 3R725 Xerox 4024 DP legal Legal 8 5 x 14 in 3R727 Transparencies Xerox 3M Type L transparencies A4 210 x 297 mm 3R91334 Xerox Clear transparencies Let...

Page 35: ...ce completion of the last print to minimize energy consumption Continuous Operating Printing Speed Paper Size Fuser Setting Duplex Low Medium High Extra High ipm Letter SEF 18 26 22 8 19 A4 SEF 18 25...

Page 36: ...5 80 Relative Humidity with no condensation present Severe condition 1 month maximum at 20 to 0 C 4 to 32 F or 35 to 40 C 95 to104 F 5 15 or 80 95 Relative Humidity with no condensation present Storag...

Page 37: ...1 20 Phaser 4400 Laser Printer Service Manual...

Page 38: ...quire running Service Diagnostics tests to verify a specific printer assembly is operating correctly Refer to Service Diagnostics on page 2 7 To troubleshoot problems not associated with a front panel...

Page 39: ...emove any foreign matter such as paper clips staples pieces of paper dust or toner 6 Clean the printer interior with a lint free cloth dampened slightly with cold water and mild detergent Do not use s...

Page 40: ...u to perform a certain action or procedure The steps are to be followed sequentially in the order given until the problem is fixed or resolved 2 The Actions and Questions box contains additional infor...

Page 41: ...ake sure the printer is switched ON the Imaging Unit and the paper trays are in place and the interlock switches are actuated 6 All voltage values given in the troubleshooting procedures are approxima...

Page 42: ...rror message and code then cycle power to the printer to see if the error recurs Accessing Fault History 1 View the printer s fault history on the front panel a Enter Menus then select Support Menu Se...

Page 43: ...ine Error Log Item 262 Fault History Codes for Engine Errors Fault History Code Error Fault History Code Error 0 Fan Failure U5 6 Tray 2 3 Failure E11 1 Fuser Failure U4 7 Tray 1 Failure C3 2 Motor Fa...

Page 44: ...ower press and hold Back Info until the message Entering Service Diagnostics appears on the display then release the keys The Service Diagnostics Menu appears The Service Diagnostic menu has the follo...

Page 45: ...ay Full Sensor Printer Tray 1 Low Paper Sensor Tray 2 Low Paper Sensor Tray 3 Low Paper Sensor Tray 1 No Paper Sensor Tray 2 No Paper Sensor Tray 3 No Paper Sensor MPT No Paper Sensor Envelope Feeder...

Page 46: ...nge keep pressing the OK key until the highlight wraps to the desired digit In most of the Service Diagnostics menus use the Back key to exit a menu to the level just above In most cases scrolling to...

Page 47: ...unters a problem while printing the Engine Test Print it halts printing and displays an error message on the Front Panel Refer to the Diagnostic Messages in the Print Engine Error Messages table that...

Page 48: ...ver to Clear PSE 1 Code Jam PSE 1 2 30 Door and Cover Errors Close Front Cover Close Rear Cover 2 31 Consumable Errors Install or Reseat Print Cartridge 2 33 Replace Print Cartridge 2 34 Toner is Low...

Page 49: ...Paper Path Go to Jam at Tray Open Tray and Front Cover on page 2 18 E2 11 Feed Jam E2 12 E2 13 Paper does not arrive at Registration Sensor position within the specified time Jam At Envelope Feeder Re...

Page 50: ...nsor 2 Exit Sensor on at power on E4 3 Exit Jam Custom Paper late off Exit Sensor exceeding the specified time from Registration Sensor Open Rear Cover Clear Paper Path Change Paper Setting in Custom...

Page 51: ...i Envelope Feeder Empty Envelope Feeder is out of paper Load Paper into Envelope Feeder Go to Load Envelope Feeder with paper size paper type on page 2 55 Load MPT MPT Paper Empty MPT is out of paper...

Page 52: ...he Duplex Unit on page 2 36 Stacker Failure Press i E9 2 Stacker Unit Fail Stacker removed while power is on Reinstall Stacker Go to Stacker Failure on page 2 37 Install or Reseat the Envelope Feeder...

Page 53: ...Toner Low Toner Low is detected after 10 prints while Toner Sensor is on Go to Toner is Low on page 2 35 Main Motor Failure Press i U1 Motor Fail Power Off Main Motor speed is less than specified RPM...

Page 54: ...ser warm up is completed Go to Fuser Failure on page 2 49 Fan Failure Power Off Now Press i U5 Fan Fail Power Off Main Fan has failed Check the Main Fan Power Off and On Go to Fan Failure Power Off No...

Page 55: ...select Test Print 2 Run five prints from every paper tray Does the problem appear when printing from Tray 2 or 3 Go to step 9 Go to step 4 4 1 Remove Tray 1 from the printer 2 Check the Nudger Roller...

Page 56: ...o to step 12 12 1 Remove the tray currently in Feeder 2 2 Check the Nudger and Feed Rollers in Feeder 2 for contamination and wear Are the Feed Rollers clean and in good condition Go to step 13 Replac...

Page 57: ...0 Remove the obstruction clean or replace the Turn Roller Assembly RRP 11 8 on page 6 127 18 Perform Tray Motor Assembly Checkout on page 3 26 to check the tray motor Does it operate correctly Check t...

Page 58: ...ed Belts RRP 13 17 on page 6 176 3 1 Enter Service Diagnostics and select Clutch Tests 2 Scroll to Envelope Feeder and press OK Can you hear the clutch energize Go to step 4 Go to Envelope Feed Clutch...

Page 59: ...PT and remove the paper or obstruction 2 Check the MPT Feed Roller for contamination and wear Is the feed roller clean and in good condition Go to step 3 Replace the MPT Feed Roller RRP 4 3 on page 6...

Page 60: ...Board RRP 9 3 on page 6 89 Follow the repair advice in the Registration Sensor check Registration Jam Troubleshooting Procedure Step Actions and Questions Yes No 1 1 Switch the printer power OFF 2 Op...

Page 61: ...RRP 8 2 on page 6 85 Main Motor Assembly RRP 8 1 on page 6 84 9 Perform Registration Sensor on page 3 20 to test the Registration Sensor Is the Registration Sensor working correctly Go to step 10 Rep...

Page 62: ...r stack The paper is within specification If Custom Mode is used the settings are correct Are all settings correct and is the paper within specification Go to step 2 Install fresh paper that is within...

Page 63: ...1 2 on page 7 4 7 1 Scroll to Motors Fans Tests and press OK 2 Scroll to Exit Motor Forward and press OK Does the Exit Motor rotate Go to step 8 Go to Exit Motor on page 3 35 8 Do the Exit Rollers and...

Page 64: ...Problem solved 3 1 Enter Service Diagnostics and select Sensor Tests 2 Scroll to Stacker Sensor test and press OK 3 Open the Stacker Rear Cover 4 Press and release the Stacker Exit Sensor Actuator Do...

Page 65: ...eplace the Stacker Rollers as necessary RRP 10 14 on page 6 114 RRP 10 15 on page 6 115 9 1 Switch the printer power OFF 2 Remove the Stacker RRP 10 1 on page 6 101 3 Open the printer rear cover and c...

Page 66: ...scraps and obstructions from the printer 2 Check the Duplex Belt Rollers and gears Check for contamination wear and obstructions Are the Duplex rollers gears and belt clean and in good condition Go to...

Page 67: ...ex PWB 3 Measure the resistance on the disconnected plug between pin 1 and pin 2 between pin 1 and pin 3 between pin 1 and pin 4 and between pin 1 and pin 5 Are all four readings between 30 and 37 ohm...

Page 68: ...sted Does the paper size displayed on the Front Panel display match the size of the paper actually loaded in the tray Replace the Engine Logic Board RRP 9 3 on page 6 89 Replace the Tray Size PWB RRP...

Page 69: ...ront Cover Replace the Engine Logic Board RRP 9 3 on page 6 89 Go to step 6 6 1 Switch the printer power OFF 2 Remove the Left Interface Cover RRP 1 1 on page 6 6 Left Cover RRP 1 2 on page 6 7 and th...

Page 70: ...ss OK 3 Insert and remove the Print Cartridge a few times Does the display alternate between Not Installed and Installed as you remove and replace the Print Cartridge Replace the Engine Logic Board RR...

Page 71: ...cartridge installed and 3 3 VDC with the print cartridge removed Go to step 5 Go to step 3 3 Check the voltage between P J42 pin 3 and pin 1 Is the voltage 24 VDC Replace the TonerSensor RRP 5 2 on pa...

Page 72: ...stalled and 3 3 VDC with the print cartridge removed Go to step 5 Go to step 3 3 Check the voltage between P J42 pin 3 and pin 1 Is the voltage 24 VDC Replace the TonerSensor RRP 5 2 on page 6 59 Go t...

Page 73: ...n page 6 89 Image Processor Board RRP 9 2 on page 6 88 Front Panel RRP x x on page 6 14 Duplex Unit Troubleshooting Procedure Step Actions and Questions Yes No 1 1 Switch the printer power OFF 2 Remov...

Page 74: ...ame ground Is the voltage 3 3 VDC Go to step 3 Replace the Engine Logic Board RRP 9 3 on page 6 89 3 1 Switch the printer power OFF 2 Properly install the Stacker on the printer 3 Switch the printer p...

Page 75: ...4 10 on page 6 56 Go to step 5 5 Check the Connector Harness Assembly for proper connection and for defective wires Is the Harness in good condition Replace the Connector PWB RRP 9 7 on page 6 94 Repa...

Page 76: ...essage reappear Go to step 2 Problem solved 2 1 Remove the affected tray Assembly 2 Push up the Low Paper Actuator manually and then release The Low Paper Actuator moves smoothly Go to step 3 Repair o...

Page 77: ...h the printer power OFF 2 Remove the Left Interface Cover RRP 1 1 on page 6 6 Left Cover RRP 1 2 on page 6 7 and the Left Plate RRP 1 11 on page 6 16 3 Switch the printer power on 4 On the Engine Logi...

Page 78: ...nually actuate the Tray 1 No Paper sensor Does the No Paper Actuator move smoothly Go to step 6 Replace the Tray 1 No Paper Actuator RRP 3 3 on page 6 30 6 1 Enter Service Diagnostics and select Senso...

Page 79: ...uestions Yes No 1 Does the problem appear when using Tray 1 2 or 3 Go to step 2 Go to step 3 2 1 Verify the size of paper currently in the MPT Tray 2 Select Menus and press OK then 3 Select Printer Se...

Page 80: ...hooting Procedure Step Actions and Questions Yes No 1 1 Enter Service Diagnostics 2 Print a test print from every tray Does the Error Code specify Tray 2 or Tray 3 Go to step 11 Go to step 2 2 Remove...

Page 81: ...the following parts one at a time until the problem is resolved Stack Height Sensor RRP 3 4 on page 6 31 Feeder PWB RRP 3 9 on page 6 37 Size 1 PWB RRP 3 13 on page 6 42 Engine Logic Board RRP 9 3 on...

Page 82: ...eder PWB RRP 11 9 on page 6 128 Size PWB RRP 11 19 on page 6 139 Engine Logic Board RRP 9 3 on page 6 89 19 Remove the tray now occupying the Tray 1 position and continue with Tray Motor Assembly Chec...

Page 83: ...r open cheat the Front Cover Interlock 2 Enter Service Diagnostics and select Motor Fans Tests 3 Scroll to Main Motor and press OK 4 Visually inspect the Main Motor and Main Drive Gears Do the Main Mo...

Page 84: ...he printer have a Tray 2 Go to step 12 Replace the Main Motor Assembly RRP 8 1 page 6 84 12 Scroll to Motor Tray 2 Feed and press OK Does the Main Motor rotate smoothly Go to step 13 Repair or replace...

Page 85: ...n up Go to step 3 Go to Laser Assembly on page 3 17 3 1 Switch the printer power OFF 2 Remove the Left Interface Cover RRP 1 1 on page 6 6 the Left Cover RRP 1 2 on page 6 7 and the Left Plate RRP 1 1...

Page 86: ...printer power OFF Wait a few minutes then switch the printer power on Does the error message reappear Go to Fuser Assembly on page 3 18 Go to step 2 2 Run 25 to 30 test prints Does the error message r...

Page 87: ...e Fan Motor High Speed test still highlighted press OK Does the voltage change from 0 8 VDC to 0 0 VDC when you press OK Replace the LVPS RRP 9 5 on page 6 91 Replace the Engine Logic Board RRP 9 3 on...

Page 88: ...ower OFF 2 Remove the Left Interface Cover RRP 1 1 on page 6 6 Left Cover RRP 1 2 on page 6 7 and the Left Plate RRP 1 11 on page 6 16 3 Switch the printer power on 4 On the Engine Logic Board measure...

Page 89: ...wer on 4 On the Engine Logic Board check the voltage between P J33 pin 13 and frame ground Is the voltage 24 VDC Go to step 10 Go to step 3 3 On the Engine Logic Board check the voltage between P J33...

Page 90: ...ing connector PL 2 2 on page 7 8 9 Check that the paper tray mating connector and the feeder mating connector are properly aligned when the tray is inserted into the feeder Are the mating connectors p...

Page 91: ...two pins Go to step 14 Replace the paper tray mating connector PL 2 2 on page 7 8 14 Check that the paper tray mating connector and the feeder mating connector are properly aligned when the tray is in...

Page 92: ...cuit Replace Engine Logic Board RRP 9 3 on page 6 89 Go to Stacker Full Sensor on page 3 37 Load Envelope Troubleshooting Procedure Step Actions and Questions Yes No 1 1 Enter Service Diagnostics and...

Page 93: ...eeder PWB RRP 13 3 on page 6 159 If the problem persists replace the Envelope Feeder No Paper Sensor RRP 13 10 on page 6 166 Go to step 5 5 1 Remove the Front Cover RRP 1 6 on page 6 11 and the Left F...

Page 94: ...s OK 3 Insert and remove the Print Cartridge a few times Does the display alternate between Not Installed and Installed as you remove and replace the Print Cartridge Replace the Engine Logic Board RRP...

Page 95: ...te they are functioning properly For hard faults The health LED blinks according to the fault code The Front Panel LED blinks in unison with the health LED The last posted message to the Front Panel d...

Page 96: ...B port failure E Net Port Failure Replace Image Processor Board RRP 9 2 on page 6 88 5 5 1 1 1 1 14 REAL TIME CLOCK Image Processor Board Timer failure Go to Image Processor Isolation on page 3 31 5 5...

Page 97: ...ST_DEV_DIMM Ram Memory Slot 1 Rejected for POST_DEV_DIMM Ram Memory Slot 2 Rejected for POST_DEV_DIMM IDE Disk for POST_DEV_IDEOPT Parallel Port for POST_DEV_CENT 15 RAM DIMM RAM Error RAM DIMM Troubl...

Page 98: ...the problem has been corrected Measurements Power and signal grounds are connected to frame ground You can perform all circuit troubleshooting using the metal frame chassis as the grounding point If...

Page 99: ...f you later find the condition has not been corrected inform your manager in writing of the improper wiring Index of Troubleshooting Procedures Verifying AC Power 3 2 Print Cartridge Sensor Assembly 3...

Page 100: ...and Neutral and between Line and Earth Ground should range from 198 to 264 VAC and the voltage between Neutral and Ground should be less than 3 VAC Is the AC line voltage within specification Go to s...

Page 101: ...atch the line voltage Go to step 4 Go to step 3 3 1 Switch the printer power OFF 2 Replace fuse F1 125 V 10 A 250 V 3 A 3 Switch the printer power ON 4 Measure the voltage between both sides of the Fu...

Page 102: ...ck switch as necessary 9 Check the voltages listed in the LVPS Voltages table Are all voltage measurements correct Return to Service Flowchart on page 2 2 or to the procedure that sent you here Go to...

Page 103: ...It should be 5 0 VDC 3 Measure the voltage between P J281 pin 10 and frame ground It should be 3 3 VDC 4 Measure the voltage between P J281 pin 1 and frame ground It should be 24 0 VDC Are all the vol...

Page 104: ...he printer power ON 4 Measure the voltages listed in Step 2 sub steps 2 through 4 Are all the voltages correct Repeat the step with the next disconnected plug Replace the component just connected to t...

Page 105: ...nel display alternate between Toner Normal and Toner Low as you remove and replace the Print Cartridge Replace the Engine Logic Board RRP 9 3 on page 6 89 Go to step 4 4 1 Switch the printer power OFF...

Page 106: ...orrect AC voltage is being supplied to the printer Go to step 3 Notify customer that the power is out of specification 3 Perform DC Power LVPS on page 3 4 then return here Did DC Power LVPS indicate t...

Page 107: ...page 6 90 Replace the LVPS RRP 9 5 on page 6 91 11 1 Switch the printer power OFF 2 Remove any options connected to the Image Processor Board 3 Reconnect J910 to the Image Processor Board 4 Switch the...

Page 108: ...power ON 5 On the Image Processor Board check the voltages between each pin of J790 and frame ground Are all the voltages correct when J790 is disconnected Go to step 8 Go to step 2 2 On the Image Pro...

Page 109: ...LVPS RRP 9 5 on page 6 91 8 1 Switch the printer power OFF 2 Reconnect J790 to the Image Processor Board 3 Switch the printer power ON 4 Check the voltages between the pins listed in the table in ste...

Page 110: ...e 7 2 Erratic Printer Operation Troubleshooting Procedure Step Actions and Questions Yes No 1 1 Disconnect all host cables 2 Enter Service Diagnostics and select Test Print Run 15 to 20 test prints Do...

Page 111: ...n RRP 9 1 page 6 87 P J284 Front Interlock Switch RRP 9 9 page 6 96 P J1 5 VDC Power Supply RRP 9 4 page 6 90 5 Connect the power cord 6 Switch the printer power ON and measure the voltages listed her...

Page 112: ...J27 Fuser Sensors RRP 6 2 on page 6 66 4 Switch the printer power ON and measure the voltages listed in Step 1 Are all voltages correct Go to step 5 Replace the Engine Logic Board RRP 9 3 on page 6 8...

Page 113: ...Go to step 7 7 On the Engine Logic Board check the voltage between P J28 pin 7 and frame ground Is the voltage 5 0 VDC Replace the Engine Logic Board RRP 9 3 on page 6 89 Replace the LVPS RRP 9 5 on...

Page 114: ...step 2 2 1 Switch the printer power OFF 2 Remove the Left Interface Cover RRP 1 1 on page 6 6 Left Cover RRP 1 2 on page 6 7 and the Left Plate RRP 1 11 on page 6 16 3 Switch the printer power ON 4 Ch...

Page 115: ...e voltage 5 0 VDC Replace the Engine Logic Board RRP 9 3 on page 6 89 Go to Print Cartridge Sensor Assembly on page 3 24 8 Measure the voltage between P J21 pin 9 and frame ground Is the voltage 5 0 V...

Page 116: ...ween P11 pin 1 and pin 2 Is there less than 5 ohms resistance Go to step 5 Repair or replace the Fuser Harness Assembly RRP 6 3 on page 6 67 5 1 Reconnect P J11 and disconnect P J27 from the Engine Lo...

Page 117: ...power OFF 2 Remove the Left Interface Cover RRP 1 1 on page 6 6 Left Cover RRP 1 2 on page 6 7 and the Left Plate RRP 1 11 on page 6 16 3 Switch the printer power ON 4 On the Engine Logic Board measur...

Page 118: ...power OFF 2 Remove the Left Interface Cover RRP 1 1 on page 6 6 Left Cover RRP 1 2 on page 6 7 and the Left Plate RRP 1 11 on page 6 16 3 Switch the printer power ON 4 On the Engine Logic Board measu...

Page 119: ...FF 2 Remove the Left Interface Cover RRP 1 1 on page 6 6 Left Cover RRP 1 2 on page 6 7 and the Left Plate RRP 1 11 on page 6 16 3 Switch the printer power ON 4 On the Engine Logic Board measure the v...

Page 120: ...connect P J31 to the Engine Logic Board Switch the printer power ON 3 On the Engine Logic Board measure the voltage between P J31 pin 3 and frame ground Is there 3 3 VDC between P J31 pin 3 and frame...

Page 121: ...the printer 0 134 VDC 3 25 VDC Middle pin on sensor 0 VDC 0 VDC Bottom pin on sensor 1 2 VDC 1 2 VDC Print Cartridge Sensor Assembly Troubleshooting Procedure Step Actions and Questions Yes No 1 1 Op...

Page 122: ...ame ground Is the voltage 5 0 VDC Go to step 5 Replace the Engine Logic Board RRP 9 3 on page 6 89 5 1 Check the voltage between P J25 pin 3 and frame ground 2 Slide the Print Cartridge out and back i...

Page 123: ...frame ground Is the voltage 24 VDC Go to step 2 Go to DC Power LVPS on page 3 4 2 On the left side of the paper tray measure the motor winding resistance from the middle contact to the lower contact...

Page 124: ...145 to 165 ohms Replace the Connector PWB 9 7 page 6 98 Replace the Registration Clutch RRP 5 5 on page 6 62 Replace the Engine Logic Board RRP 9 3 on page 6 89 4 1 Reconnect P J23 2 Switch the printe...

Page 125: ...eft side of the Paper Tray measure the resistance between the upper and lower contacts on the Paper Feeder Connector Is there continuity between the two contacts Go to step 5 Replace the Paper Feeder...

Page 126: ...to step 3 3 1 Switch the printer power OFF 2 Remove the Left Interface Cover RRP 1 1 on page 6 6 Left Cover RRP 1 2 on page 6 7 and the Left Plate RRP 1 11 on page 6 16 3 Switch the printer power ON 4...

Page 127: ...e Connector PWB RRP 9 7 on page 6 94 Replace the MPT Pick Up Solenoid RRP 4 9 page 6 55 4 1 Reconnect P J23 2 Switch the printer power ON 3 Check the voltage between P J23 pin 6 and frame ground Is th...

Page 128: ...ower ON Does the printer boot up correctly and is Ready displayed on the Front Panel Problem solved Replace the Image Processor Board RRP 9 2 on page 6 88 3 1 Switch the printer power OFF 2 Reinstall...

Page 129: ...tch 3 Enter Service Diagnostics and select Component Checks 4 Scroll to each of the high voltage tests page 3 32 5 Measure the voltage between the contact listed and frame ground Press the Enter Key A...

Page 130: ...Cartridge Are the terminals in good condition and contacting properly when the cartridge is installed Go to step 4 Replace as necessary Transport Chute Assembly RRP 6 1 on page 6 65 Print Cartridge P...

Page 131: ...th Paper and Without Paper as you block and unblock the sensor Replace the Engine Logic Board RRP 9 3 on page 6 89 Go to step 3 3 1 Switch the printer power OFF 2 Remove the Left Interface Cover RRP 1...

Page 132: ...Motor rotate Go to step 3 Go to step 5 3 Scroll to Exit Motor Reverse High and press OK Does the Exit Motor run in reverse at high speed Go to step 4 Go to step 5 4 Scroll to Exit Motor Reverse Low a...

Page 133: ...eeder 2 Disconnect P J651 from the Feed Clutch 3 Measure the resistance between the two pins on the feed clutch Does the resistance measure 140 to 170 ohms Replace the Feeder PWB RRP 11 9 page 6 128 I...

Page 134: ...power OFF 2 Remove the Left Interface Cover RRP 1 1 on page 6 6 Left Cover RRP 1 2 on page 6 7 and the Left Plate RRP 1 11 on page 6 16 3 Switch the printer power ON 4 On the Engine Logic Board measur...

Page 135: ...connected plug measure the resistance between pins 1 and 3 pins 1 and 5 pins 2 and 4 and between pins 2 and 6 Does the resistance measure between 245 and 265 ohms Replace the Stacker PWB RRP 10 7 on p...

Page 136: ...RP 13 12 on page 6 168 Replace the belts as necessary Envelope No Paper Sensor Troubleshooting Procedure Step Actions and Questions Yes No 1 1 Enter Service Diagnostics and select Sensor Tests 2 Scrol...

Page 137: ...in 5 on the Connector PWB and P J23 Pin 3 on the Engine Logic Board Is there continuity between the pins Replace the Envelope Connector Assembly RRP 4 10 on page 6 56 Go to step 6 6 Check the Connecto...

Page 138: ...istance in evaluating image quality problems is available in the Diagnostics Pages on the Printable Pages Menu These pages contain detailed explanations of print quality and image quality problems alo...

Page 139: ...curl cuts folds or embossed marks page 3 71 RESOLUTION At 600 dpi the two pixel lines and halftone patches cannot be reproduced clearly on the print page 3 72 SPOT DELETIONS Solid areas are marked wit...

Page 140: ...Phaser 4400 Laser Printer Service Manual 3 43 Test Print...

Page 141: ...er larger than 0 5 mm visible on test prints Are there deletions on the test prints Go to step 2 Go to Fusing 2 Are there vertical in process direction Line Band deletions present Go to Vertical Delet...

Page 142: ...nvironment will affect the warm up time The weight lb gsm or composition such as rag content of the paper or transparency will affect the fusing of prints High humidity will have an adverse effect on...

Page 143: ...diagonal lines should be clear and continuous The diagonal lines might appear to be narrower than the others Arrow 2 The text paragraphs should be roughly equal in density Arrow 3 The half tone patch...

Page 144: ...he image will be shifted left Measure the registration on two consecutive Test Prints Fold the paper in half side edge to side edge Observe the fold line of the paper with reference to the cross hairs...

Page 145: ...nt Otherwise the image will be shifted left Measure the registration on two consecutive Test Prints 1 Fold the paper in half Lead Edge to Trail Edge 2 Observe the fold line of the paper with reference...

Page 146: ...rvice Diagnostics select Engine Test Print and press OK 2 Scroll to Print Test Pattern and press OK 3 Measure the dimensions A and B on two consecutive test patterns Is the difference between A and B...

Page 147: ...ions and Questions Yes No 1 On the Main Menu select Printable Pages Menu 2 Scroll to Print Test Prints and press OK 3 Inspect the ladder chart test pattern as shown in the figure Is the pattern free f...

Page 148: ...rger than or equal to 0 5 mm visible on the prints There should be no more than 1 spot measuring between 0 4 mm and 0 5 mm visible on the print There should be no more than 16 spots measuring between...

Page 149: ...to Service Flowchart on page 2 2 Go to step 2 2 Are there dark streaks present on the Test Prints Go to page 3 63 page 3 65 Streaks Go to step 3 3 Is there a residual image ghost on the Test Print Go...

Page 150: ...procedures should always be performed before beginning any Image quality Repair procedure Be sure that the paper meets printer specifications Changing the paper or using paper from a previously unopen...

Page 151: ...nts Troubleshooting Procedure Step Actions and Questions Yes No 1 1 Load fresh dry paper 2 Print a test print Does the image density meet specifications Problem solved Go to step 2 2 1 Install a new P...

Page 152: ...nd switch OFF the printer power halfway through the print cycle Carefully remove the Print Cartridge and inspect the toner image on the drum just before the transfer area Transfer Roller Is the image...

Page 153: ...s Yes No 1 1 Enter Service Diagnostics and select Engine Test Print 2 Scroll to Print Quantity and press OK 3 Select 5 then press OK 4 Scroll to Print Test Pattern and press OK Are the test prints bla...

Page 154: ...t and free of contamination Go to step 7 Replace the Transfer Roller Assembly RRP 7 1 on page 6 79 7 1 Generate a Test Print as in step 1 and switch OFF the printer power halfway through the print cyc...

Page 155: ...t side of the Print Cartridge and in the Print Cartridge Side Guide in the printer are clean Ensure the machine covers are in place and fit well so no outside light can enter the machine Black Prints...

Page 156: ...the Print Cartridge Side Guide in the printer are clean Ensure there are no obstructions in the Laser path Check that rollers and other components in the paper path are clean and unobstructed Vertical...

Page 157: ...user will be hot 1 Open the Rear Cover and remove the Fuser Assembly 2 Rotate the fuser idler gear manually and inspect the Heat Roller 3 Open the fuser jam access cover 4 Rotate the fuser idler gear...

Page 158: ...Check that the paper supply is dry and fresh Inspect the printer paper path for items such as staples paper clips and paper scraps Check installation of the Print Cartridge Check that the Print Cartri...

Page 159: ...a test print Is the problem still present Go to step 4 Problem solved 4 1 Install a new Print Cartridge 2 Print a test print Is the problem still present Go to step 5 Problem solved 5 Inspect the Tra...

Page 160: ...ver 4 Rotate the fuser idler gear manually and inspect the Pressure Roller Are the Heat Roller and the Pressure Roller free of surface defects and contamination Go to step 9 Replace the Fuser Assembly...

Page 161: ...3 Go to step 2 2 1 Exit Service Diagnostics 2 When the printer is Ready scroll to Printable Pages and press OK 3 Scroll to Print Configuration Pages and press OK Do the prints have vertical streaks Re...

Page 162: ...ght side of the Print Cartridge and in the Print Cartridge Side Guide in the printer are clean 6 Warning If the printer has been switched on the Fuser will be hot 1 Open the Rear Cover and remove the...

Page 163: ...appears to be with the host computer or the cables If theproblems persist replace the Image Processor Board RRP 9 2 on page 6 88 3 1 Install a new Print Cartridge 2 Print a Test Print Are the horizont...

Page 164: ...transfer area Transfer Roller Was the toner image on the Drum transferred to the paper along with any horizontal streaks Go to step 9 Replace the Transfer Roller Assembly RRP 7 1 on page 6 79 9 Warnin...

Page 165: ...that the Print Cartridge ground contacts on the right side of the Print Cartridge and in the Print Cartridge Side Guide in the printer are clean Check that rollers and other components in the paper p...

Page 166: ...f the printer has been switched on the Fuser will be hot 1 Open the Rear Cover 2 Remove the Fuser Assembly 3 Rotate the fuser idler gear manually and inspect the Heat Roller 4 Open fuser jam access co...

Page 167: ...s on page 3 54 5 1 Open the Rear Cover 2 Remove the Fuser Assembly 3 Rotate the fuser idler gear manually and inspect the Heat Roller 4 Open the fuser jam access cover Rotate the fuser idler gear manu...

Page 168: ...y standard paper Print a Test Print Is the paper still damaged Go to step 3 Problem solved 3 Warning If the printer has been switched on the Fuser will be hot 1 Open the Rear Cover and remove the Fuse...

Page 169: ...fective component is found RRP 6 2 Fuser Assembly on page 6 66 RRP 6 1 Transport Chute Assembly on page 6 65 RRP 7 1 Transfer Roller Assembly on page 6 79 RRP 4 1 MPT Chute Assembly on page 6 44 RRP 4...

Page 170: ...artridge and in the Print Cartridge Side Guide in the printer are clean Spot Deletions Troubleshooting Procedure Step Actions and Questions Yes No 1 1 Load fresh dry paper 2 Print a test print Is the...

Page 171: ...e fuser idler gear manually and inspect the Pressure Roller Are the Heat Roller and the Pressure Roller free of surface defects and contamination Go to step 5 Replace the Fuser Assembly RRP 6 2 on pag...

Page 172: ...e clean Verify the paper is within the specifications on the Paper Tips Pages 4 Do the defects occur every 94 mm 3 7 in 104 mm 4 10 in Replace the Fuser Assembly RRP 6 2 on page 6 66 Residual Image Tr...

Page 173: ...Fuser will be hot 1 Open the Rear Cover and remove the Fuser Assembly 2 Rotate the fuser idler gear manually and inspect the Heat Roller 3 Open the fuser jam access cover 4 Rotate the fuser idler gear...

Page 174: ...nd switch OFF the printer power halfway through the print cycle 2 Carefully remove the Print Cartridge and inspect the toner image on the drum just before the transfer area Transfer Roller Are the und...

Page 175: ...en Density Troubleshooting Procedure Step Actions and Questions Yes No 1 Print a Test Print Does the Test Print output image contain uneven print Go to step 2 Go to Service Flowchart on page 2 2 2 1 I...

Page 176: ...for contamination on the Fuser Roller or Pressure Roller The Fuser Assembly is in good condition Go to step 5 Replace the Fuser Assembly RRP 6 2 on page 6 66 5 Panic stop the printer half way through...

Page 177: ...ck actuation and for obstructions or contamination Clean or replace as necessary Check the Registration Rolls Clean or replace if necessary Check the Transfer Roller Roller and bearings Clean or repla...

Page 178: ...Tray 2 Retard Pad Retard Roller Clean or replace if necessary Check the Tray 2 Nudger Roller Clean or replace if necessary Check the Tray 2 Transport Rolls Check for obstructions or contamination Cle...

Page 179: ...Does misregistration occur in the horizontal scan direction Go to step 7 Go to step 5 5 Have the customer send another print job Is the print image properly registered Problem solved Have the customer...

Page 180: ...within specification Check the paper path for any obstructions or debris Skips Smears Troubleshooting Procedure Step Actions and Questions Yes No 1 Print a test print Does the image have skips or sme...

Page 181: ...3 84 Phaser 4400 Laser Printer Service Manual...

Page 182: ...er s Printable Pages Menu when you select Print Test Prints The other is the Engine Test Print which is stored in the Engine Logic Board and is accessible through the Engine Test Print menu in Service...

Page 183: ...print parameter that you want to set or change and press OK In most cases you are prompted to choose from several alternatives such as choosing the input tray In other cases Job Offset for instance if...

Page 184: ...Phaser 4400 Laser Printer Service Manual 4 3...

Page 185: ...Printer Service Manual Engine Test Print The Engine Test Print is stored on the Engine Logic Board and is used for checking the functionality of various print engine components and for making the reg...

Page 186: ...o that the quantity is correct press the Back key to enter the selection 6 Scroll to Print Test Pattern and press OK to print an Engine Test Pattern Note The measurement should be made on two consecut...

Page 187: ...he distance from the left edge of the paper to the edge of the thick vertical line The measurement should be 5 mm 2 mm 8 Repeat steps 1 through 7 until correct measurements are achieved 9 Perform Regi...

Page 188: ...job defaults front panel language Intelligent ready MPT Tray setup Tray 1 3 setup startup page front panel intensity front panel contrast PostScript error information and energy star to their default...

Page 189: ...scroll to Supplies Info Menu and press OK 2 Scroll to Reset Fuser Life and press OK 3 Reset NVRAM is highlighted press OK 4 Highlight Reset NVRAM and Reset Printer NOW and press OK to reset all the se...

Page 190: ...Phaser 4400 Laser Printer Service Manual 4 9 Print Engine NVRAM There is no single reset for the Print Engine NVRAM...

Page 191: ...4 10 Phaser 4400 Laser Printer Service Manual...

Page 192: ...commended Tools Toner vacuum cleaner Clean water Clean dry lint free cloth Black light protective bag Cleaning Caution Never apply alcohol to any parts in the printer Note Never use a damp cloth to cl...

Page 193: ...5 2 Phaser 4400 Laser Printer Service Manual...

Page 194: ...force to either remove or install a part Locations such as left right front or rear given in the repairs assume you are facing the printer front panel The Print Cartridge should be removed and stored...

Page 195: ...Tray Assembly 6 48 RRP 4 5 MPT No Paper Actuator 6 50 RRP 4 6 Tray Pick Up 6 51 RRP 4 7 Retard Pad Assembly 6 52 RRP 4 8 MPT No Paper Sensor 6 53 RRP 4 9 MPT Pick Up Solenoid 6 55 RRP 4 10 Envelope Co...

Page 196: ...tch Assembly 6 96 RRP 9 10 Rear Interlock Switch Assembly 6 97 RRP 9 11 Stacker Harness Assembly 6 98 RRP 9 12 Duplex Harness Assembly 6 99 Stacker 6 101 RRP 10 1 Stacker 6 101 RRP 10 2 Exit Tray Exte...

Page 197: ...ow Paper Sensor 6 133 RRP 11 15 Feeder Socket 6 134 RRP 11 16 550 Sheet Feeder Size Harness Assembly 6 135 RRP 11 17 Size Sensor Housing Assembly 6 136 RRP 11 18 Size Sensor Actuators 6 138 RRP 11 19...

Page 198: ...RRP 13 6 Exit Sensor Assembly 6 162 RRP 13 7 Weight Arm 6 163 RRP 13 8 Tray Extension 6 164 RRP 13 9 No Paper Actuator 6 165 RRP 13 10 No Paper Sensor 6 166 RRP 13 11 Gear Cover 6 167 RRP 13 12 Feed...

Page 199: ...Trays RRP 1 1 Left Interface Cover See the Parts List on page 7 2 Warning Switch off the power and disconnect the Power Cord 1 Loosen the two thumb screws that secure the Left Interface Cover 2 Slide...

Page 200: ...he Parts List on page 7 2 Warning Switch off the power and disconnect the Power Cord 1 Remove the Left Interface Cover RRP 1 1 Left Interface Cover on page 6 6 2 Remove the two screws securing the Lef...

Page 201: ...he Parts List on page 7 2 Warning Switch off the power and disconnect the Power Cord 1 Squeeze the cover release and open the Rear Cover Assembly 2 Push the two locking tabs at the rear of Option Cove...

Page 202: ...emove Tray 1 2 Remove the Front Cover Assembly RRP 1 6 Front Cover Assembly on page 6 11 3 Remove the Left Front Cover RRP 1 7 Left Front Cover on page 6 12 4 Open the Rear Cover Assembly 5 Remove the...

Page 203: ...Front Cover RRP 1 7 Left Front Cover on page 6 12 4 Open the Rear Cover Assembly 5 Remove the Top Cover Assembly RRP 1 4 Top Cover Assembly on page 6 9 6 Remove the four screws securing the Right Cov...

Page 204: ...he power and disconnect the Power Cord 1 Open the Front Cover Assembly 2 Disconnect the spring then slide the Cover Stopper to the left or right and remove from the right cover 3 Remove the K clip tha...

Page 205: ...Warning Switch off the power and disconnect the Power Cord 1 Remove Tray 1 2 Remove the Front Cover Assembly RRP 1 6 Front Cover Assembly on page 6 11 3 Remove the three screws securing the Left Front...

Page 206: ...r and disconnect the Power Cord 1 Open the Rear Cover Assembly by squeezing the clips 2 Lift the lead edge of the locking tab to release and remove the Stopper from the cover 3 Slide the Pivot Stopper...

Page 207: ...y See the Parts List on page 7 2 Warning Switch off the power and disconnect the Power Cord 1 Remove the Top Cover Assembly RRP 1 4 Top Cover Assembly on page 6 9 2 Remove the four screws securing the...

Page 208: ...witch off the power and disconnect the Power Cord 1 Remove Rear Cover Assembly RRP 1 8 Rear Cover Assembly on page 6 13 2 Remove the screw that secures the Stopper to the printer 3 Remove the two scre...

Page 209: ...ning Switch off the power and disconnect the Power Cord 1 Remove Tray 1 2 Remove the Left Interface Cover RRP 1 1 Left Interface Cover on page 6 6 3 Remove the Left Cover RRP 1 2 Left Cover on page 6...

Page 210: ...ver RRP 1 1 Left Interface Cover on page 6 6 3 Remove the Left Cover RRP 1 2 Left Cover on page 6 7 4 Remove the Front Cover Assembly RRP 1 6 Front Cover Assembly on page 6 11 5 Remove the Left Front...

Page 211: ...Manual Tray 1 RRP 2 1 Retard Roller Assembly See the Parts List on page 7 6 1 Remove Tray 1 2 Release the left and right latches of Tray 1 3 Open the Retard Chute 4 Lift the locking tab and remove th...

Page 212: ...Phaser 4400 Laser Printer Service Manual 6 19 Retard Roller Assembly...

Page 213: ...ease the left and right latches of Tray 1 3 Open the Retard Chute 4 Lift the locking tab and remove the Retard Roller Assembly 5 Remove the Friction Clutch Assembly from the shaft Replacement Reinstal...

Page 214: ...Phaser 4400 Laser Printer Service Manual 6 21 Retard Roller Friction Clutch Assembly...

Page 215: ...etard Spring See the Parts List on page 7 6 1 Remove Tray 1 2 Release the left and right latches of Tray 1 3 Open the Retard Chute 4 Release the two Locking Tabs and lift the Retard Assembly 5 Remove...

Page 216: ...Phaser 4400 Laser Printer Service Manual 6 23 Replacement Reinstall the components in the reverse order Ensure that the tab on the clutch is positioned on the pin on the Retard Shaft Retard Spring...

Page 217: ...ight Motor Brackets to the tray 3 Remove both mounting brackets and motor springs Note It may be necessary to use a scribe or small screwdriver to lift the locking tabs to disconnect P J672 4 Press th...

Page 218: ...Phaser 4400 Laser Printer Service Manual 6 25 Motor Assembly...

Page 219: ...et to the tray 3 Remove the Motor Spring Note It may be necessary to use a scribe or small screwdriver to lift the locking tabs to disconnect P J672 4 Disconnect P J672 from the Socket Guide 5 Remove...

Page 220: ...Phaser 4400 Laser Printer Service Manual 6 27 Connector and Socket Guide...

Page 221: ...ont Cover Assembly on page 6 11 5 Remove the Left Front Cover RRP 1 7 Left Front Cover on page 6 12 6 Remove the Left Plate RRP 1 11 Left Plate on page 6 16 7 Remove the Plate Handle RRP 1 12 Plate Ha...

Page 222: ...2 6 Remove the Left Plate RRP 1 11 Left Plate on page 6 16 7 Remove the Plate Handle RRP 1 12 Plate Handle on page 6 17 8 Open Rear Door 9 Remove the Top Cover Assembly RRP 1 4 Top Cover Assembly on p...

Page 223: ...d remove the Duplex Unit RRP 12 1 Duplex Unit on page 6 141 3 Rotate the No Paper Actuator up until the left end of the actuator can be removed from the support Remove the actuator Note If removing or...

Page 224: ...12 1 Duplex Unit on page 6 141 3 Remove the No Paper Actuator RRP 3 3 Tray 1 No Paper Actuator on page 6 30 4 Release the five hooks and remove the Stack Height Sensor 5 Disconnect P J662 from the sen...

Page 225: ...Remove the Duplex Unit if installed RRP 12 1 Duplex Unit on page 6 141 3 Release the five hooks and remove the Low Paper Sensor 4 Disconnect P J661 from the sensor Note If removing or replacing the se...

Page 226: ...he Left Plate RRP 1 11 Left Plate on page 6 16 5 Remove the Plate Handle RRP 1 12 Plate Handle on page 6 17 6 Remove the Top Cover Assembly RRP 1 4 Top Cover Assembly on page 6 9 7 Remove the Right Co...

Page 227: ...Clutch Assembly to the Feeder 13 Disconnect P J651 from the clutch 14 Remove the Feed Clutch Assembly Feed Clutch Assembly Replacement Reinstall the components in the reverse order Ensure that all al...

Page 228: ...on page 6 16 7 Remove the Plate Handle RRP 1 12 Plate Handle on page 6 17 8 Open Rear Door 9 Remove the Top Cover Assembly RRP 1 4 Top Cover Assembly on page 6 9 10 Remove the Right Cover RRP 1 5 Righ...

Page 229: ...ed Rollers See the Parts List on page 7 10 Warning Switch off the power and disconnect the Power Cord 1 Remove Tray 1 2 Release the locking tab on the Front Feed Roller and slide the roller to the rig...

Page 230: ...ly on page 6 11 5 Remove the Left Front Cover RRP 1 7 Left Front Cover on page 6 12 6 Remove the Left Plate RRP 1 11 Left Plate on page 6 16 7 Remove the Plate Handle RRP 1 12 Plate Handle on page 6 1...

Page 231: ...6 38 Phaser 4400 Laser Printer Service Manual Feeder PWB...

Page 232: ...page 6 12 6 Remove the Left Plate RRP 1 11 Left Plate on page 6 16 7 Remove the Plate Handle RRP 1 12 Plate Handle on page 6 17 8 Open Rear Door 9 Remove the Top Cover Assembly RRP 1 4 Top Cover Assem...

Page 233: ...t Cover on page 6 7 4 Remove the Front Cover Assembly RRP 1 6 Front Cover Assembly on page 6 11 5 Remove the Left Front Cover Assembly RRP 1 7 Left Front Cover on page 6 12 6 Remove the Left Plate RRP...

Page 234: ...late Handle on page 6 17 7 Remove the Size Sensor Housing RRP 3 11 Size Sensor Housing on page 6 40 Note Observe orientation of switch actuators before removal 8 Remove the three screws that secure th...

Page 235: ...RRP 1 2 Left Cover on page 6 7 5 Remove the Front Cover Assembly RRP 1 6 Front Cover Assembly on page 6 11 6 Remove the Left Front Cover Assembly RRP 1 7 Left Front Cover on page 6 12 7 Remove the Le...

Page 236: ...e the Front Cover Assembly RRP 1 6 Front Cover Assembly on page 6 11 5 Remove the Left Front Cover Assembly RRP 1 7 Left Front Cover on page 6 12 6 Remove the Left Plate RRP 1 11 Left Plate on page 6...

Page 237: ...ay 1 2 Remove the Front Cover Assembly RRP 1 6 Front Cover Assembly on page 6 11 3 Remove the Left Front Cover RRP 1 7 Left Front Cover on page 6 12 4 Disconnect P J41 P J44 and P J45 from the Connect...

Page 238: ...Front Cover on page 6 12 4 Remove the MPT Chute Assembly RRP 4 1 MPT Chute Assembly on page 6 44 5 Remove the MPT Pick Up Gear Spring 6 Lift the locking tab and remove the Pick Up Gear 7 Lift the lock...

Page 239: ...6 46 Phaser 4400 Laser Printer Service Manual MPT Pick Up Cam MPT Roller Assembly...

Page 240: ...ng Switch off the power and disconnect the Power Cord 1 Open the Front Cover 2 Lift the locking tab and slide the right collar to the right 3 Slide the MPT Feed Roller to the right and remove Replacem...

Page 241: ...nt Cover RRP 1 7 Left Front Cover on page 6 12 4 Remove the MPT Chute Assembly RRP 4 1 MPT Chute Assembly on page 6 44 5 Remove the MPT Feed Roller Assembly RRP 4 2 MPT Feed Roller Assembly on page 6...

Page 242: ...Bottom Tray Assembly Replacement Reinstall the components in the reverse order Note After replacing the tray bottom ensure that the sleeves on the Tray Bottom fit over the two posts on the MPT frame S...

Page 243: ...er Assembly on page 6 11 3 Remove the Left Front Cover RRP 1 7 Left Front Cover on page 6 12 4 Remove the MPT Chute Assembly RRP 4 1 MPT Chute Assembly on page 6 44 5 Remove the MPT Feed Roller Assemb...

Page 244: ...Cover Assembly on page 6 11 3 Remove the Left Front Cover RRP 1 7 Left Front Cover on page 6 12 4 Remove the MPT Chute Assembly RRP 4 1 MPT Chute Assembly on page 6 44 5 Remove the MPT Feed Roller As...

Page 245: ...e the Left Front Cover RRP 1 7 Left Front Cover on page 6 12 4 Remove the MPT Chute Assembly RRP 4 1 MPT Chute Assembly on page 6 44 5 Remove the MPT Feed Roller Assembly RRP 4 2 MPT Feed Roller Assem...

Page 246: ...RRP 1 7 Left Front Cover on page 6 12 4 Remove the MPT Chute Assembly RRP 4 1 MPT Chute Assembly on page 6 44 5 Remove the MPT Feed Roller Assembly RRP 4 2 MPT Feed Roller Assembly on page 6 45 6 Open...

Page 247: ...6 54 Phaser 4400 Laser Printer Service Manual MPT No Paper Sensor...

Page 248: ...1 2 Remove the Front Cover Assembly RRP 1 6 Front Cover Assembly on page 6 11 3 Remove the Left Front Cover RRP 1 7 Left Front Cover on page 6 12 4 Remove the MPT Chute Assembly RRP 4 1 MPT Chute Asse...

Page 249: ...Assembly on page 6 11 3 Remove the MPT Chute Assembly RRP 4 1 MPT Chute Assembly on page 6 44 4 Remove the MPT Pickup Gear and Spring step 5 in RRP 4 9 MPT Pick Up Solenoid on page 6 55 5 Remove the...

Page 250: ...Cover Assembly on page 6 11 3 Remove the Left Front Cover RRP 1 7 Left Front Cover on page 6 12 4 Remove the MPT Chute Assembly RRP 4 1 MPT Chute Assembly on page 6 44 5 Using a screwdriver slide Shaf...

Page 251: ...6 58 Phaser 4400 Laser Printer Service Manual Paper Handler Assembly Paper Handler Assembly Removal...

Page 252: ...14 Warning Switch off the power and disconnect the Power Cord 1 Remove Tray 1 2 Remove the Front Cover Assembly RRP 1 6 Front Cover Assembly on page 6 11 3 Release the left locking tab and remove the...

Page 253: ...ve Tray 1 2 Remove the Front Cover Assembly RRP 1 6 Front Cover Assembly on page 6 11 3 Remove the MPT Chute Assembly RRP 4 1 MPT Chute Assembly on page 6 44 4 Open the Upper Chute 5 Disconnect the ri...

Page 254: ...Cover RRP 1 7 Left Front Cover on page 6 12 4 Remove the MPT Chute Assembly RRP 4 1 MPT Chute Assembly on page 6 44 5 Remove the Paper Handler Assembly RRP 5 1 Paper Handler Assembly on page 6 57 6 Re...

Page 255: ...andler Assembly RRP 5 1 Paper Handler Assembly on page 6 57 6 Remove the E ring that secures the Registration Clutch to the Paper Handler Assembly as shown 7 Slide the clutch out and disconnect P J453...

Page 256: ...silver colored 11 Squeeze and hold the Upper Chute and Inlet Chute together Align the hole in the chute with the tab on the Left Bearing Remove the Left Bearing from the Metal Registration Roller Note...

Page 257: ...6 64 Phaser 4400 Laser Printer Service Manual Registration Springs Rubber Registration Roller...

Page 258: ...sembly RRP 4 1 MPT Chute Assembly on page 6 44 5 Remove the Paper Handler Assembly RRP 5 1 Paper Handler Assembly on page 6 57 6 Remove the Transfer Roller Assembly RRP 7 1 Transfer Roller Assembly on...

Page 259: ...7 16 Warning Switch off the power and disconnect the Power Cord The Fuser may be hot 1 Open the Rear Cover Assembly 2 Remove Duplex Unit if installed RRP 12 1 Duplex Unit on page 6 141 3 Remove the tw...

Page 260: ...Assembly RRP 4 1 MPT Chute Assembly on page 6 44 12 Remove the Paper Handler Assembly RRP 5 1 Paper Handler Assembly on page 6 57 13 Remove the Transport Chute Assembly RRP 6 1 Transport Chute Assemb...

Page 261: ...6 68 Phaser 4400 Laser Printer Service Manual Fuser Harness Assembly...

Page 262: ...r RRP 1 7 Left Front Cover on page 6 12 5 Remove the Left Cover RRP 1 2 Left Cover on page 6 7 6 Remove the Left Plate RRP 1 11 Left Plate on page 6 16 7 Remove the Top Cover Assembly RRP 1 4 Top Cove...

Page 263: ...6 70 Phaser 4400 Laser Printer Service Manual Exit Chute Assembly...

Page 264: ...RP 1 7 Left Front Cover on page 6 12 5 Remove the Left Cover RRP 1 2 Left Cover on page 6 7 6 Remove the Left Plate RRP 1 11 Left Plate on page 6 16 7 Remove the Top Cover Assembly RRP 1 4 Top Cover A...

Page 265: ...ve Tray 1 2 Remove the Left Interface Cover RRP 1 1 Left Interface Cover on page 6 6 3 Remove the Top Cover Assembly RRP 1 4 Top Cover Assembly on page 6 9 4 Rotate the Output Tray Full Actuator away...

Page 266: ...Rear Cover Assembly on page 6 13 8 Remove the Interlock Cover RRP 1 10 Interlock Cover on page 6 15 9 Remove the Left Plate RRP 1 11 Left Plate on page 6 16 10 Remove the Exit Chute Assembly RRP 6 4 E...

Page 267: ...6 74 Phaser 4400 Laser Printer Service Manual Replacement Reinstall the components in the reverse order Exit 17 and Exit 32 Gears...

Page 268: ...Phaser 4400 Laser Printer Service Manual 6 75 Mid 1 Roller Assembly Mid 2 Roller Assembly...

Page 269: ...1 1 Left Interface Cover on page 6 6 3 Remove the Left Cover RRP 1 2 Left Cover on page 6 7 4 Remove the Top Cover Assembly RRP 1 4 Top Cover Assembly on page 6 9 5 Remove the Rear Cover Assembly RRP...

Page 270: ...disengaging the wiring harness on each end Note The Heat Rod must be removed before the Upper Cover Assembly to avoid breakage 5 Invert the Fuser Assembly to access the Fuser Heat Rod 6 Remove the thr...

Page 271: ...6 78 Phaser 4400 Laser Printer Service Manual Heat Rod Fuser Upper Cover...

Page 272: ...sfer Roller with your hands Oil from your hands can cause image quality problems After removing the Transfer Roller store the Roller on clean paper and cover with another sheet of paper 1 Open the Fro...

Page 273: ...6 11 4 Remove the Left Front Cover RRP 1 7 Left Front Cover on page 6 12 5 Remove the Top Cover Assembly RRP 1 4 Top Cover Assembly on page 6 9 6 Remove the Left Plate RRP 1 11 Left Plate on page 6 1...

Page 274: ...bly RRP 1 4 Top Cover Assembly on page 6 9 4 Remove the Left Plate RRP 1 11 Left Plate on page 6 16 5 Remove the Print Cartridge Top Guide Assembly RRP 7 2 Print Cartridge Top Guide Assembly on page 6...

Page 275: ...Power Cord 1 Remove the Top Cover Assembly RRP 1 4 Top Cover Assembly on page 6 9 2 Remove the four screws securing the Laser Assembly to the printer 3 Raising the Laser Assembly slightly disconnect...

Page 276: ...bly on page 6 9 4 Remove the Right Cover RRP 1 5 Right Cover on page 6 10 5 Remove the MPT Chute Assembly RRP 4 1 MPT Chute Assembly on page 6 44 6 Remove the Paper Handler Assembly RRP 5 1 Paper Hand...

Page 277: ...Left Interface Cover RRP 1 1 Left Interface Cover on page 6 6 2 Remove the Left Cover RRP 1 2 Left Cover on page 6 7 3 Remove the Left Plate RRP 1 11 Left Plate on page 6 16 4 Disconnect P J29 from t...

Page 278: ...4 1 MPT Chute Assembly on page 6 44 9 Remove the Paper Handler Assembly RRP 5 1 Paper Handler Assembly on page 6 57 10 Remove the Chute Trans Assembly RRP 6 1 Transport Chute Assembly on page 6 65 11...

Page 279: ...6 86 Phaser 4400 Laser Printer Service Manual Drive Gear Assembly...

Page 280: ...ge 6 7 4 Remove the Front Cover Assembly RRP 1 6 Front Cover Assembly on page 6 11 5 Remove the Left Front Cover RRP 1 7 Left Front Cover on page 6 12 6 Remove the Top Cover Assembly RRP 1 4 Top Cover...

Page 281: ...Interface Cover on page 6 6 3 Disconnect J790 J910 and J500 if a hard drive is present from the Image Processor Board 4 Remove the five screws that attach the rear panel to the printer 5 Remove the t...

Page 282: ...ng Switch off the power and disconnect the Power Cord 1 Remove the Left Interface Cover RRP 1 1 Left Interface Cover on page 6 6 2 Remove the Left Cover RRP 1 2 Left Cover on page 6 7 3 Remove the Lef...

Page 283: ...Warning Switch off the power and disconnect the Power Cord 1 Remove the Left Interface Cover RRP 1 1 Left Interface Cover on page 6 6 2 Remove the Left Cover RRP 1 2 Left Cover on page 6 7 3 Remove th...

Page 284: ...erface Cover on page 6 6 3 Remove the Left Cover RRP 1 2 Left Cover on page 6 7 4 Remove the Front Cover Assembly RRP 1 6 Front Cover Assembly on page 6 11 5 Remove the Left Front Cover RRP 1 7 Left F...

Page 285: ...y RRP 4 1 MPT Chute Assembly on page 6 44 5 Remove the Paper Handler Assembly RRP 5 1 Paper Handler Assembly on page 6 57 6 Remove the Transfer Roller Assembly RRP 7 1 Transfer Roller Assembly on page...

Page 286: ...Phaser 4400 Laser Printer Service Manual 6 93 HVPS PWB...

Page 287: ...wer and disconnect the Power Cord 1 Remove Tray 1 2 Remove the Print Cartridge and store in safe place 3 Remove the Front Cover Assembly RRP 1 6 Front Cover Assembly on page 6 11 4 Remove the Left Fro...

Page 288: ...r on page 6 7 4 Remove the Front Cover Assembly RRP 1 6 Front Cover Assembly on page 6 11 5 Remove the Left Front Cover RRP 1 7 Left Front Cover on page 6 12 6 Remove the Left Plate RRP 1 11 Left Plat...

Page 289: ...ft Cover on page 6 7 4 Remove the Front Cover Assembly RRP 1 6 Front Cover Assembly on page 6 11 5 Remove the Left Front Cover RRP 1 7 Left Front Cover on page 6 12 6 Remove the Left Plate RRP 1 11 Le...

Page 290: ...mbly RRP 1 6 Front Cover Assembly on page 6 11 5 Remove the Left Front Cover RRP 1 7 Left Front Cover on page 6 12 6 Remove the Top Cover Assembly RRP 1 4 Top Cover Assembly on page 6 9 7 Open the Rea...

Page 291: ...4 Remove the Front Cover Assembly RRP 1 6 Front Cover Assembly on page 6 11 5 Remove the Left Front Cover RRP 1 7 Left Front Cover on page 6 12 6 Remove the Top Cover Assembly RRP 1 4 Top Cover Assem...

Page 292: ...Cover Assembly on page 6 13 8 Remove the Left Plate RRP 1 11 Left Plate on page 6 16 9 Remove the Plate Handle RRP 1 12 Plate Handle on page 6 17 10 Remove the MPT Chute Assembly RRP 4 1 MPT Chute Ass...

Page 293: ...6 100 Phaser 4400 Laser Printer Service Manual Duplex Harness Assembly...

Page 294: ...rts List on page 7 38 Warning Switch off the power and disconnect the Power Cord 1 Open the printer Rear Cover 2 Press the two locking tabs at the rear of the Stacker 3 Lift the rear of the Stacker ap...

Page 295: ...pin is free 4 Slide the tray to the right and remove it Exit Tray Extension RRP 10 3 Exit Tray See the Parts List on page 7 38 Warning Switch off the power and disconnect the Power Cord 1 Remove the E...

Page 296: ...Phaser 4400 Laser Printer Service Manual 6 103 Exit Tray Paper Weight Exit Tray...

Page 297: ...Power Cord 1 Remove the Stacker RRP 10 1 Stacker on page 6 101 2 Remove the Lower Cover RRP 10 5 Lower Cover on page 6 105 3 Remove the Inner Exit Chute Assembly RRP 10 6 Inner Exit Chute Assembly on...

Page 298: ...ect the Power Cord 1 Remove the Stacker RRP 10 1 Stacker on page 6 101 2 Carefully turn the Stacker upside down 3 Remove the six screws that secure the lower cover 4 Remove the Lower Cover Lower Cover...

Page 299: ...Warning Switch off the power and disconnect the Power Cord 1 Remove the Stacker RRP 10 1 Stacker on page 6 101 2 Remove the Lower Cover RRP 10 5 Lower Cover on page 6 105 3 Remove the five screws tha...

Page 300: ...arning Switch off the power and disconnect the Power Cord 1 Remove the Stacker RRP 10 1 Stacker on page 6 101 2 Remove the Lower Cover RRP 10 5 Lower Cover on page 6 105 3 Remove the Inner Exit Chute...

Page 301: ...er on page 6 105 3 Remove the Inner Exit Chute Assembly RRP 10 6 Inner Exit Chute Assembly on page 6 106 4 Remove the two screws that secure the motor to the Inner Exit Chute Assembly 5 Disconnect P J...

Page 302: ...the Power Cord 1 Remove the Stacker RRP 10 1 Stacker on page 6 101 2 Remove the Lower Cover RRP 10 5 Lower Cover on page 6 105 3 Remove the Inner Exit Chute Assembly RRP 10 6 Inner Exit Chute Assembl...

Page 303: ...Remove the Stacker RRP 10 1 Stacker on page 6 101 2 Remove the Lower Cover RRP 10 5 Lower Cover on page 6 105 3 Remove the Inner Exit Chute Assembly RRP 10 6 Inner Exit Chute Assembly on page 6 106 4...

Page 304: ...isconnect the Power Cord 1 Remove the Stacker RRP 10 1 Stacker on page 6 101 2 Remove the Lower Cover RRP 10 5 Lower Cover on page 6 105 3 Remove the Inner Exit Chute Assembly RRP 10 6 Inner Exit Chut...

Page 305: ...rd 1 Remove the Stacker RRP 10 1 Stacker on page 6 101 2 Remove the Lower Cover RRP 10 5 Lower Cover on page 6 105 3 Remove the Inner Exit Chute Assembly RRP 10 6 Inner Exit Chute Assembly on page 6 1...

Page 306: ...acker RRP 10 1 Stacker on page 6 101 2 Remove the Lower Cover RRP 10 5 Lower Cover on page 6 105 3 Remove the Inner Exit Chute Assembly RRP 10 6 Inner Exit Chute Assembly on page 6 106 4 Remove the St...

Page 307: ...6 Inner Exit Chute Assembly on page 6 106 4 Remove the Stacker PWB RRP 10 7 Stacker PWB on page 6 107 5 Remove the Static Eliminator RRP 10 9 Static Eliminator on page 6 109 6 Remove the Stacker Full...

Page 308: ...r Exit Chute Assembly on page 6 106 4 Remove the Stacker PWB RRP 10 7 Stacker PWB on page 6 107 5 Remove the screw that secures the ground plate to the bottom of the Motor Drive Assembly 6 Remove the...

Page 309: ...6 116 Phaser 4400 Laser Printer Service Manual Locking Tab Exit Gear and Bearings Mid Roller Assembly...

Page 310: ...ver on page 6 105 3 Remove the Inner Exit Chute Assembly RRP 10 6 Inner Exit Chute Assembly on page 6 106 4 Release the two locking tabs and remove the Offset Lever from the Offset Assembly 5 Remove t...

Page 311: ...move the Stacker RRP 10 1 Stacker on page 6 101 2 Remove the Lower Cover RRP 10 5 Lower Cover on page 6 105 3 Remove the Inner Exit Chute Assembly RRP 10 6 Inner Exit Chute Assembly on page 6 106 4 Re...

Page 312: ...101 2 Remove the Lower Cover RRP 10 5 Lower Cover on page 6 105 3 Remove the Inner Exit Chute Assembly RRP 10 6 Inner Exit Chute Assembly on page 6 106 4 Remove the Offset Assembly RRP 10 16 Offset A...

Page 313: ...Switch off the power and disconnect the Power Cord Warning Do not try to lift the printer by yourself The printer is heavy lifting it requires two people 1 Remove Tray 1 from the Feeder 2 Remove the t...

Page 314: ...List on page 7 26 Warning Switch off the power and disconnect the Power Cord 1 Remove the printer from the 550 Sheet Feeder RRP 11 1 Printer Removal on page 6 120 2 Remove the Tray from the Feeder 3...

Page 315: ...e 7 26 Warning Switch off the power and disconnect the Power Cord 1 Remove the printer from the 550 Sheet Feeder RRP 11 1 Printer Removal on page 6 120 2 Remove the Tray from the Feeder 3 Remove the f...

Page 316: ...g Switch off the power and disconnect the Power Cord 1 Remove the printer from the 550 Sheet Feeder RRP 11 1 Printer Removal on page 6 120 2 Remove the Tray from the Feeder 3 Remove the five screws th...

Page 317: ...Remove the Tray from the Feeder 3 Remove the 550 Sheet Feeder Right Cover RRP 11 2 550 Sheet Feeder Right Cover on page 6 121 4 Remove the 550 Sheet Feeder Left Cover RRP 11 3 550 Sheet Feeder Left Co...

Page 318: ...emove the 550 Sheet Feeder Right Cover RRP 11 2 550 Sheet Feeder Right Cover on page 6 121 4 Remove the 550 Sheet Feeder Left Cover RRP 11 3 550 Sheet Feeder Left Cover on page 6 122 5 Remove 550 Shee...

Page 319: ...Switch off the power and disconnect the Power Cord Note The view shown in the illustration is from the rear of the printer 1 Remove the Tray from the Feeder 2 Rotate the No Paper Actuator up until the...

Page 320: ...Cover on page 6 121 4 Remove the 550 Sheet Feeder Left Cover RRP 11 3 550 Sheet Feeder Left Cover on page 6 122 5 Remove 550 Sheet Feeder Gear Bracket Assembly RRP 11 4 550 Sheet Feeder Gear Bracket A...

Page 321: ...Remove the 550 Sheet Feeder Right Cover RRP 11 2 550 Sheet Feeder Right Cover on page 6 121 4 Remove the 550 Sheet Feeder Left Cover RRP 11 3 550 Sheet Feeder Left Cover on page 6 122 5 Remove 550 She...

Page 322: ...er Left Cover RRP 11 3 550 Sheet Feeder Left Cover on page 6 122 5 Remove 550 Sheet Feeder Gear Bracket Assembly RRP 11 4 550 Sheet Feeder Gear Bracket Assembly on page 6 123 6 Remove the Top Plate RR...

Page 323: ...rts List on page 7 28 Warning Switch off the power and disconnect the Power Cord 1 Remove the Tray 2 Release the locking tab on the Front Feed Roller and slide the roller to the right off the shaft 3...

Page 324: ...r on page 6 122 5 Remove 550 Sheet Feeder Gear Bracket Assembly RRP 11 4 550 Sheet Feeder Gear Bracket Assembly on page 6 123 6 Remove the Top Plate RRP 11 5 Top Plate on page 6 124 7 Remove the 550 S...

Page 325: ...7 10 Warning Switch off the power and disconnect the Power Cord 1 Remove the Tray from the Feeder 2 Remove the No Paper Actuator RRP 11 7 No Paper Actuator on page 6 126 3 Release the five hooks and...

Page 326: ...14 Low Paper Sensor See the Parts List on page 7 28 Warning Switch off the power and disconnect the Power Cord 1 Remove the Tray from the Feeder 2 Release the five hooks and remove the Low Paper Senso...

Page 327: ...ff the power and disconnect the Power Cord 1 Remove the Tray 2 Remove the two screws that secure the Socket to the Feeder in the printer 3 It may be necessary to use a scribe or small screwdriver to l...

Page 328: ...the Tray from the Feeder 3 Remove the 550 Sheet Feeder Left Cover RRP 11 3 550 Sheet Feeder Left Cover on page 6 122 4 Remove the two screws that secure the 550 Sheet Feeder Size Harness Assembly 5 Re...

Page 329: ...eet Feeder RRP 11 1 Printer Removal on page 6 120 2 Remove the Tray from the Feeder 3 Remove the 550 Sheet Feeder Left Cover RRP 11 3 550 Sheet Feeder Left Cover on page 6 122 4 Remove the two screws...

Page 330: ...Phaser 4400 Laser Printer Service Manual 6 137 Size Sensor Housing Assembly 4...

Page 331: ...der Left Cover on page 6 122 5 Remove the Size Sensor Housing Assembly RRP 11 17 Size Sensor Housing Assembly on page 6 136 Note Observe orientation of switch actuators before removal 6 Remove the thr...

Page 332: ...he Tray from the Feeder 3 Remove the 550 Sheet Feeder Left Cover RRP 11 3 550 Sheet Feeder Left Cover on page 6 122 4 Remove the 550 Sheet Feeder Size Harness Assembly RRP 11 16 550 Sheet Feeder Size...

Page 333: ...der Left Cover RRP 11 3 550 Sheet Feeder Left Cover on page 6 122 4 Remove the 550 Sheet Feeder Size Harness Assembly RRP 11 16 550 Sheet Feeder Size Harness Assembly on page 6 135 5 Remove the Size S...

Page 334: ...uplex Unit RRP 12 1 Duplex Unit See the Parts List on page 7 34 Warning Switch off the power and disconnect the Power Cord 1 Open the Printer Rear Cover 2 Push the left and right latches in then pull...

Page 335: ...embly See the Parts List on page 7 34 Warning Switch off the power and disconnect the Power Cord 1 Remove the Duplex Unit RRP 12 1 Duplex Unit on page 6 141 2 Remove the two screws that secure the Tur...

Page 336: ...he Parts List on page 7 36 Warning Switch off the power and disconnect the Power Cord 1 Remove the Duplex Unit RRP 12 1 Duplex Unit on page 6 141 2 Turn the Duplex Unit upside down 3 Release the three...

Page 337: ...all ESD procedures to avoid damage Warning Switch off the power and disconnect the Power Cord 1 Remove the Duplex Unit RRP 12 1 Duplex Unit on page 6 141 2 Remove the Duplex Cover RRP 12 3 Duplex Cov...

Page 338: ...12 5 Drive Cover See the Parts List on page 7 34 Warning Switch off the power and disconnect the Power Cord 1 Remove the Duplex Unit RRP 12 1 Duplex Unit on page 6 141 2 Remove the two screws that sec...

Page 339: ...Unit on page 6 141 2 Remove the Duplex Cover RRP 12 3 Duplex Cover on page 6 143 3 Remove the Drive Cover RRP 12 5 Drive Cover on page 6 145 4 Remove the Duplex PWB RRP 12 4 Duplex PWB on page 6 144 O...

Page 340: ...ex Cover RRP 12 3 Duplex Cover on page 6 143 3 Remove the Drive Cover RRP 12 5 Drive Cover on page 6 145 4 Remove the Connector Chute Assembly RRP 12 6 Connector Chute Assembly on page 6 146 5 Push th...

Page 341: ...6 148 Phaser 4400 Laser Printer Service Manual Upper Chute Assembly...

Page 342: ...1 Remove the Duplex Unit RRP 12 1 Duplex Unit on page 6 141 2 Remove the Duplex Cover RRP 12 3 Duplex Cover on page 6 143 3 Remove the Drive Cover RRP 12 5 Drive Cover on page 6 145 4 Disconnect P J38...

Page 343: ...he Duplex Cover RRP 12 3 Duplex Cover on page 6 143 4 Remove the Drive Cover RRP 12 5 Drive Cover on page 6 145 5 Remove the Motor Assembly RRP 12 8 Motor Assembly on page 6 149 6 Release the locking...

Page 344: ...rive Cover RRP 12 5 Drive Cover on page 6 145 5 Remove the Connector Chute Assembly RRP 12 6 Connector Chute Assembly on page 6 146 6 Remove the Motor Assembly RRP 12 8 Motor Assembly on page 6 149 7...

Page 345: ...6 152 Phaser 4400 Laser Printer Service Manual Locking Tab and Belt Retainer Flange Middle Roller Assembly...

Page 346: ...the tabs and open the Upper Chute Assembly 3 Release the locking tab and remove the belt retainer flange 4 Remove the Synchronous Belt from the Pulley RRP 12 12 Synchronous Belt on page 6 154 5 Remov...

Page 347: ...st on page 7 36 Warning Switch off the power and disconnect the Power Cord 1 Remove the Duplex Unit RRP 12 1 Duplex Unit on page 6 141 2 Remove the Drive Cover RRP 12 5 Drive Cover on page 6 145 3 Rel...

Page 348: ...rning Switch off the power and disconnect the Power Cord 1 Remove the Duplex Unit RRP 12 1 Duplex Unit on page 6 141 2 Remove the Duplex Cover RRP 12 3 Duplex Cover on page 6 143 3 Disconnect P J37 fr...

Page 349: ...ist on page 7 36 Warning Switch off the power and disconnect the Power Cord 1 Remove the Duplex Unit RRP 12 1 Duplex Unit on page 6 141 2 Release the four locking tabs that secure the Duplex Unit Home...

Page 350: ...Envelope Feeder from the printer 2 Turn the Feeder upside down 3 Remove the two screws that secure the front of the Bottom Cover 4 Rotate the front of the Bottom Cover up until the two rear tabs can...

Page 351: ...sconnect the Power Cord 1 Remove the Envelope Feeder from the printer 2 Remove the Bottom Cover RRP 13 1 Bottom Cover on page 6 157 3 Remove the four screws that secure the Top Chute 4 Rotate the feed...

Page 352: ...ocedures to avoid damage Warning Switch off the power and disconnect the Power Cord 1 Remove the Envelope Feeder from the printer 2 Remove the Bottom Cover RRP 13 1 Bottom Cover on page 6 157 3 Remove...

Page 353: ...Switch off the power and disconnect the Power Cord 1 Remove the Envelope Feeder from the printer 2 Remove the Bottom Cover RRP 13 1 Bottom Cover on page 6 157 3 Remove the Top Chute RRP 13 2 Top Chut...

Page 354: ...lope Feeder from the printer 2 Remove the Bottom Cover RRP 13 1 Bottom Cover on page 6 157 3 Remove the Top Chute RRP 13 2 Top Chute on page 6 158 4 Carefully pry up on either end of the Pinch Roller...

Page 355: ...arning Switch off the power and disconnect the Power Cord 1 Remove the Envelope Feeder from the printer 2 Remove the Bottom Cover RRP 13 1 Bottom Cover on page 6 157 3 Remove the Top Chute RRP 13 2 To...

Page 356: ...m See the Parts List on page 7 30 Warning Switch off the power and disconnect the Power Cord 1 Remove the Envelope Feeder from the printer 2 Deflect the center of the Weight Arm until the end of the a...

Page 357: ...See the Parts List on page 7 30 Warning Switch off the power and disconnect the Power Cord 1 Remove the Envelope Feeder from the printer 2 Remove the Bottom Cover RRP 13 1 Bottom Cover on page 6 157 3...

Page 358: ...Warning Switch off the power and disconnect the Power Cord 1 Remove the Envelope Feeder from the printer 2 Remove the Bottom Cover RRP 13 1 Bottom Cover on page 6 157 3 Carefully pry up on the hinge p...

Page 359: ...power and disconnect the Power Cord 1 Remove the Envelope Feeder from the printer 2 Remove the Bottom Cover RRP 13 1 Bottom Cover on page 6 157 3 Remove the No Paper Actuator RRP 13 9 No Paper Actuat...

Page 360: ...ve the Top Chute RRP 13 2 Top Chute on page 6 158 4 Remove the Envelope Feeder PWB RRP 13 3 Envelope Feeder PWB on page 6 159 5 Remove the two screws that secure the Gear Cover 6 Disconnect P J416 fro...

Page 361: ...inter 2 Remove the Bottom Cover RRP 13 1 Bottom Cover on page 6 157 3 Remove the Top Chute RRP 13 2 Top Chute on page 6 158 4 Remove the Envelope Feeder PWB RRP 13 3 Envelope Feeder PWB on page 6 159...

Page 362: ...RRP 13 2 Top Chute on page 6 158 4 Remove the Envelope Feeder PWB RRP 13 3 Envelope Feeder PWB on page 6 159 5 Remove the Gear Cover RRP 13 11 Gear Cover on page 6 167 Note The gears are not captive...

Page 363: ...4 Remove the Envelope Feeder PWB RRP 13 3 Envelope Feeder PWB on page 6 159 5 Remove the Gear Cover RRP 13 11 Gear Cover on page 6 167 Note The gears are not captive on their shafts and can fall off 6...

Page 364: ...Phaser 4400 Laser Printer Service Manual 6 171 Clutch and Bearing Bottom Roller Assembly...

Page 365: ...e 6 165 5 Remove the Envelope Feeder PWB RRP 13 3 Envelope Feeder PWB on page 6 159 6 Remove the Gear Cover RRP 13 11 Gear Cover on page 6 167 Note The gears are not captive on their shafts and can fa...

Page 366: ...Phaser 4400 Laser Printer Service Manual 6 173 Feed Roller Shaft Feed Roller Assembly 1...

Page 367: ...Chute on page 6 158 4 Remove the Envelope Feeder PWB RRP 13 3 Envelope Feeder PWB on page 6 159 5 Remove the Gear Cover RRP 13 11 Gear Cover on page 6 167 Note The gears are not captive on their shaf...

Page 368: ...Phaser 4400 Laser Printer Service Manual 6 175 Feed Roller Shaft Feed Roller Assembly 2...

Page 369: ...8 4 Remove the Envelope Feeder PWB RRP 13 3 Envelope Feeder PWB on page 6 159 5 Remove the Gear Cover RRP 13 11 Gear Cover on page 6 167 6 Remove the Feed Clutch RRP 13 12 Feed Clutch on page 6 168 7...

Page 370: ...Phaser 4400 Laser Printer Service Manual 6 177 Feed Belts...

Page 371: ...6 178 Phaser 4400 Laser Printer Service Manual...

Page 372: ...rt The notation J1 J2 and P2 is attached to a wire harness It indicates that connector jack 1 is attached to one end of the wire harness and connector jack 2 is attached to the other end that is plugg...

Page 373: ...14 16 18 19 26 9 Front Cover P O item 8 10 Left Latch Assembly P O item 8 11 Lever P O item 8 12 Right Latch Assembly P O item 8 13 3E48991 Cover Stopper 14 Envelope Chute 15 3E43880 Tray Stopper 16...

Page 374: ...Phaser 4400 Laser Printer Service Manual 7 3 PL 1 1 Covers 1 of 2 Exploded View...

Page 375: ...Latch 3 Right Latch 4 Latch Cover 5 Rear Cover 6 Direction Arm 7 600K83121 Cap Kit quantity 2 8 54K14992 Face Up Chute Assembly 9 Right Pivot Stopper 10 3E46120 Stopper 11 32E12671 Duplex Guide Rail...

Page 376: ...Phaser 4400 Laser Printer Service Manual 7 5 PL 1 2 Covers 2 of 2 Exploded View...

Page 377: ...2 2 Bottom Plate Assembly 3 End Guide Assembly 4 Extension Housing 5 Rack Slide 6 Extension Spring 7 Latch Spring 8 Size Plate 9 Base Extension 10 Left Side Guide Assembly 11 Right Side Guide Assembly...

Page 378: ...Phaser 4400 Laser Printer Service Manual 7 7 PL 2 1 Tray 1 1 of 2 Exploded View...

Page 379: ...bly 7 5K82890 Friction Clutch Assembly 8 600K79550 Roller Assembly Kit 9 Retard Bracket 10 809E11830 Retard Spring 11 Tongue Plate 12 Tongue Shaft Assembly 13 Lift Up Shaft Holder 14 Bearing 15 Lift U...

Page 380: ...Phaser 4400 Laser Printer Service Manual 7 9 PL 2 2 Tray 1 2 of 2 Exploded View...

Page 381: ...ow Paper Actuator P O item 46 35 Gear 1 12 Low Paper Actuator Support P O item 46 36 160K52781 Feeder PWB 13 130E81970 Low Paper Sensor 37 121K19010 Feed Clutch Assembly 14 162K47211 No Paper Sensor H...

Page 382: ...Phaser 4400 Laser Printer Service Manual 7 11 PL 3 1 Paper Feeder Exploded View...

Page 383: ...tuator 11 MPT Bottom Spring Tray 12 Exit Bearing 13 19K94573 Retard Pad Assembly 14 130E81970 Paper Set Sensor 15 MPT Ground Plate 16 MPT Chute Assembly 17 121E85920 Pick Up Solenoid 18 809E20171 MPT...

Page 384: ...Phaser 4400 Laser Printer Service Manual 7 13 PL 4 1 MPT Chute Exploded View...

Page 385: ...8 809E22950 Registration Spring Right Silver 9 Upper Chute Assembly 29 7E54671 Registration Gear Metal roller 10 Chute Inlet 30 Right Bearing 11 Lever Handle 31 7E54681 Registration Gear Rubber roller...

Page 386: ...Phaser 4400 Laser Printer Service Manual 7 15 PL 5 1 Paper Handler Assembly Exploded View...

Page 387: ...V with 10 11 126K14942 Fuser Assembly 230 V with 10 11 7 DTS Wire Assembly 8 TR Wire Assembly 9 962K06300 Fuser Harness Assembly 120 V J271 J11 J27 J262 962K06310 Fuser Harness Assembly 230 V J271 J1...

Page 388: ...Phaser 4400 Laser Printer Service Manual 7 17 PL 6 1 Chute Transport and Fuser Exploded View...

Page 389: ...ch Roller 10 Exit Pinch Spring 11 59K11960 MID 2 Roller Assembly 12 Pinch Roller 13 MID Pinch Spring 14 Pinch Spring 15 Exit Chute 16 130E81970 Exit Photo Sensor 17 162K46981 Stack Full Sensor Harness...

Page 390: ...Phaser 4400 Laser Printer Service Manual 7 19 PL 7 1 Exit Exploded View...

Page 391: ...O item 19 5 32K94111 Print Cartridge Top Guide Assembly 6 162K46922 Laser Harness Assembly J21 J211 J212 J213 7 62K11210 Laser Assembly 8 Print Cartridge Side Guide Assembly R with 9 10 13 16 9 Print...

Page 392: ...Phaser 4400 Laser Printer Service Manual 7 21 PL 8 1 Drive and Xerographics Exploded View...

Page 393: ...Elec Box 7 127E13840 Fan Assembly 8 Duct 9 Edge Saddle H 10 AC Clamp 11 Insulator Plate 12 Plate Handle 13 162K47001 Feeder Harness Assembly J33 J331 14 CAM Shaft 15 Size Sensor Actuators 16 Cover Siz...

Page 394: ...Phaser 4400 Laser Printer Service Manual 7 23 PL 9 1 Frame and Size Sensor Exploded View...

Page 395: ...4 MB DIMM ZMD64 8 162K46991 Duplex Harness Assembly J34 P341 97S02912 64 MB DIMM Kit 9 162K46941 Connector Harness Assembly J23 J231 156 4837 00 128 MB DIMM ZMD128 10 160K52761 Connector PWB 97S02913...

Page 396: ...Phaser 4400 Laser Printer Service Manual 7 25 PL 10 1 Electrical Exploded View...

Page 397: ...6 Size Sensor Housing 7 160K53061 Size Option PWB 8 CAM Spring 9 CAM Lever 10 CAM Shaft 11 CAM SW 12 Cover Size Sensor 13 162K48420 Size Harness Assembly 14 Clamp 15 Main Frame Assembly 16 802E04931...

Page 398: ...Phaser 4400 Laser Printer Service Manual 7 27 PL 11 1 550 Sheet Feeder 1 of 2 Exploded View...

Page 399: ...ar 3 10 Left Latch Spring 35 OPT Gear 11 Low Paper Actuator P O item 43 36 160K52781 Feeder PWB 12 Low Paper Support Actuator P O item 43 37 121K19010 Feed Clutch Assembly 13 130E81970 Low Paper Senso...

Page 400: ...Phaser 4400 Laser Printer Service Manual 7 29 PL 11 2 550 Sheet Feeder 2 of 2 Exploded View...

Page 401: ...Holder 7 Retard Spring 8 Feeder Bearing 9 59E93940 Exit Pinch Roller 10 Pinch Roller Shaft 11 Pinch Cap 12 Pinch Spring 13 Torque 29 Clutch Assembly 14 600K79310 Retard Roller Assembly with 15 15 Ret...

Page 402: ...Phaser 4400 Laser Printer Service Manual 7 31 PL 12 1 Envelope Feeder 1 of 2 Exploded View...

Page 403: ...0 Elec Clutch Bearing 11 121K87190 Feed Clutch 12 6E47120 Clutch Shaft 17 13 121K87210 One Way Clutch Assembly 14 Transport Roller Assembly with 16 15 Transport Roller 16 Bottom Roller Assembly 17 Env...

Page 404: ...Phaser 4400 Laser Printer Service Manual 7 33 PL 12 2 Envelope Feeder 2 of 2 Exploded View...

Page 405: ...lex 1 PL 13 1 Duplex 1 of 2 Item Part Description 1 Duplex Assembly with 2 6 2 Turn Chute Assembly 3 Chute Assembly Connector 4 54K15061 Upper Chute Assembly 5 Duplex Drive Cover 6 Lower Duplex Chute...

Page 406: ...Phaser 4400 Laser Printer Service Manual 7 35 PL 13 1 Duplex 1 of 2 Exploded View...

Page 407: ...Bearing 4 Duplex Gear 17 Pulley 5 Duplex Bearing 6 Duplex Gear 18 7 Duplex Gear 17 39 8 127K36520 Motor Assembly 9 423W15455 Synchronous Belt 10 Lower Duplex Chute 11 Duplex Latch 12 Duplex Latch Spri...

Page 408: ...Phaser 4400 Laser Printer Service Manual 7 37 PL 13 2 Duplex 2 of 2 Exploded View...

Page 409: ...mbly with 2 13 2 50K38632 Exit Tray Assembly 3 Tray Spring 4 50E89161 Exit Tray 5 12E09550 Weight Link 6 802E02773 Rear Cover 7 802E02755 Stacker Cover 8 54K22380 Inner Exit Chute Assembly 9 Hook Cove...

Page 410: ...Phaser 4400 Laser Printer Service Manual 7 39 PL 14 1 Stacker 1 of 2 Exploded View...

Page 411: ...set Assembly with 34 38 9 Gear 27 34 Offset Motor Assembly 10 Gear 26 35 Offset Housing 11 Gear 47W 36 130E81970 Stacker Home Sensor 12 Gear Exit 37 Offset Lever 13 Static Eliminator 38 Core Gear 14 G...

Page 412: ...Phaser 4400 Laser Printer Service Manual 7 41 PL 14 2 Stacker 2 of 2 Exploded View...

Page 413: ...7 42 Phaser 4400 Laser Printer Service Manual...

Page 414: ...bly 8 15 Drive Transmission to the Turn Roller Assembly 8 16 Drive Transmission to the Feeder Assembly 8 17 Drive Transmission to the Rubber Registration Roller Assembly 8 18 Drive Transmission to the...

Page 415: ...ycling 8 27 Erase Cycle 8 28 Fan Control 8 28 Duplex Printing 8 29 Duplex Printing Paper Path 8 29 Duplex Printing Methods 8 31 Drive Flow 8 31 Function of Major Components 8 32 Envelope Feeder 8 33 E...

Page 416: ...ogic Board to form an invisible electrostatic latent image on the drum surface 3 Development Attracts toner to the electrostatic latent image on the drum surface to form a visible toner image 4 Transf...

Page 417: ...ndividual components within the printer and serves as a side view block diagram that shows the major components that are directly related to the print cycle and to the paper path The pages that follow...

Page 418: ...n darkness Light striking the drum discharges the surface charge The BCR is a conductive roller that is positioned slightly above the surface of the drum The HVPS PWB supplies the BCR with two voltage...

Page 419: ...in layer on the Magnetic Roller Friction between the Magnetic Roller and the CM Blade generates a small electrical charge that is transferred to the toner The surface of the Magnetic Roller is made up...

Page 420: ...ace When a less negative point on the drum a discharged area comes in contact with the more negatively charged toner on the Magnetic Roller toner transfers from the Magnetic Roller to that point on th...

Page 421: ...per travels between the Transfer Roller and the drum surface This positive charge transfers the negatively charged toner image from the drum surface to the front of the paper The toner image is now on...

Page 422: ...tralize the positive voltage that was applied to it by the Transfer Roller Once the positive voltage is neutralized the paper strips easily off of the drum surface Block Diagram of the Discharge Proce...

Page 423: ...asses under the BCR The BCR applies an AC voltage to the surface of the drum to neutralize any electrical patterns remaining from the last print cycle Block Diagram of the Fusing and Cleaning Process...

Page 424: ...s that a sheet of paper can follow during a feed cycle One path is taken if paper is fed from the Paper Tray Another path is taken if paper is fed from the Multi Purpose Tray MPT A third path is taken...

Page 425: ...ime Jam At MPT Open Front Cover To Clear Press i E2 01 Feed Jam Paper arrives at Registration Sensor too early Jam At Tray 1 Open Tray And Front Cover To Clear Press i E2 11 Feed Jam Paper does not ar...

Page 426: ...nsor 2 Exit Sensor on at power on Jam At Exit Open Rear Cover To Clear Press i E4 3 Exit Jam Custom Paper late off Fuser Exit Sensor within a specified time from Registration Sensor Jam At Exit Open R...

Page 427: ...or Assembly to the printer subsystems the MPT Roller Turn Roller Feeder Assembly Registration Roller Drum and Transfer Roller Fuser and Optional Envelope Feeder The Exit Motor Assembly provides the po...

Page 428: ...created by the Main Motor Assembly is transmitted through Gear 14 to the Pick Up Gear that drives the MPT Roller Assembly When the Pick Up Solenoid actuates it transmits the energy from Gear 14 to th...

Page 429: ...er Assembly The mechanical energy created by the Main Motor Assembly is transmitted through the Drive Gear Assembly to the Turn Clutch Assembly When the Turn Clutch Assembly actuates it transmits the...

Page 430: ...hanical energy created by the Main Motor Assembly is transmitted through the Drive Gear Assembly Turn Clutch Assembly and idler gears to the Feed Clutch Assembly When the Feed Clutch Assembly actuates...

Page 431: ...er Registration Roller Assembly The mechanical energy created by the Main Motor Assembly is transmitted through the Drive Gear Assembly to the Registration Clutch that is located on the end of the Rub...

Page 432: ...The Drive Gear Assembly transmits mechanical energy from the Main Motor Assembly to the Drum drive gear that is located on the end of the Drum The Drum Gear drives the Transfer Roller Gear that is lo...

Page 433: ...ransmits the mechanical energy created by the Main Motor Assembly to the Idler Gear of the Fuser Assembly The Idler Gear transmits energy to the Heat Roller Gear located on the Heat Roller Note The Fu...

Page 434: ...n to the Exit Components The mechanical energy created by the Exit Motor Assembly provides drive to the gears located on the Exit Chute Assembly Note The Rear Door Interlock interrupts the 24 V DC sup...

Page 435: ...Image Processor IP is one of the major elements that make up the Phaser 4400 printer The primary function of the Image Process is to receive Host data through one of the following available ports Para...

Page 436: ...he Heat Rod A circuit controlled by the Heat ON signal from the Engine Logic Board switches power to the Heat Rod LVPS Block Schematic Diagram The High Voltage Power Supply HVPS The HVPS supplies high...

Page 437: ...DC power to the printer which disables all clutches motors and other users of 24 VDC Rear Door Interlock When the interlock switch opens it interrupts 24 VDC power to the exit motor Print Cartridge Se...

Page 438: ...llowing table illustrates the Laser Motor and Laser Diode Control in Various Printer Modes Printable Area Note The Printer is capable of edge to edge printing Within the 4 mm border 4 sides the printe...

Page 439: ...required for proper operation the Fuser uses a Thermistor to monitor the temperature on the surface of the Heat Roller The Engine Logic Board compares that temperature with the rated temperature that...

Page 440: ...n for at least ten seconds after warm up has completed AC Power Shutoff to the Fuser There are eight reasons that the printer shuts off AC power to the Fuser Fuser Failure U4 Paper jam Open Front Rear...

Page 441: ...print cycle During an Erase Cycle the printer switches on the Main Motor Assembly and the BCR AC and DC Transfer Roller and DB DC voltages The Erase Cycle removes any developed image toner on the dru...

Page 442: ...and fed again to the Paper Handler Assembly When the paper reaches the registration position the second side of the paper is already face up Then the printer starts to print the second side of the pap...

Page 443: ...8 30 Phaser 4400 Laser Printer Service Manual Duplex Unit Paper Path...

Page 444: ...t sheet of paper 2 The first sheet is returned to the Duplex Unit and held 3 The printer prints on one side of a second sheet of paper 4 The Duplex Unit returns the first sheet to the printer as the E...

Page 445: ...y to the Front Roller Assembly Duplex Sensor Assembly Detects paper entering and leaving the Duplex Unit Duplex Home Position Sensor Detects the position of the Duplex unit relative to the Rear Cover...

Page 446: ...Phaser 4400 Laser Printer Service Manual 8 33 Envelope Feeder Envelope Feeder Paper Path Paper that is fed from the optional Envelope Feeder follows the path shown Envelope Feeder Paper Path...

Page 447: ...ows a cut away view of the printer to better illustrate the components involved in the Envelope paper path Error codes generated by paper jams in the Envelope Feeder are listed in the Paper Jam Error...

Page 448: ...Phaser 4400 Laser Printer Service Manual 8 35 Drive Flow As shown the mechanical power generated by the Main Motor Assembly is transmitted to the gears of the Envelope Feeder Drive Flow...

Page 449: ...rs the envelope by its counterclockwise rotation Feed 2 Roller Assembly and Roller Assembly Bottom Transfers the envelope by its counterclockwise rotation and transfers the drive power to the Feed Bel...

Page 450: ...Phaser 4400 Laser Printer Service Manual 8 37 Stacker Stacker Paper Path Paper that is fed to the optional Stacker follows the path shown in this diagram Stacker Paper Path...

Page 451: ...gure below shows a cut away view of the printer to better illustrate the components of the Stacker paper path Error codes generated by paper jams in the Stacker are listed in the Paper Jam Error Codes...

Page 452: ...tes the mechanical power needed to run the Stacker Mid Roller Assembly and Offset Roller Assembly The Offset Motor Assembly generates the drive power to move the Offset Roller Assembly in alternating...

Page 453: ...Exit Sensor Assembly the sensor signal goes Low The Offset Motor Assembly begins rotating clockwise for a specified time after the signal goes Low This clockwise rotation shifts the sheet of paper fro...

Page 454: ...arriving at any point the Engine Logic Board interprets this deviation as a paper jam E6 1 Jam The specified time that the paper has to turn the Stacker Sensor Assembly Low after it has turned the Sen...

Page 455: ...ser 4400 Laser Printer Service Manual Option Feeder Assembly Option Feeder Assembly Paper Path Paper that is fed from the Optional Feeder Assembly follows the path shown here Option Feeder Paper Path...

Page 456: ...cut away view of the printer to better illustrate the components in the Option Feeder Assembly paper path Error codes generated by paper jams in the Optional Feeder Trays are listed in the Paper Jam...

Page 457: ...haser 4400 Laser Printer Service Manual Drive Flow As shown here the mechanical power generated by the Main Motor Assembly is transmitted to the gears of the Option Feeder Assembly Option Feeder Drive...

Page 458: ...Roller Assembly The task of this Assembly is to pick the paper from the Paper Tray and feed it to the Turn Roller To ensure this task the Nudger Support Assembly acts as the actuator for the Stack Hei...

Page 459: ...8 46 Phaser 4400 Laser Printer Service Manual Major Components of the Option Feeder Assembly...

Page 460: ...eder 9 22 550 Sheet Feeder P J Table 9 22 550 Sheet Feeder P J Map 9 23 550 Sheet Feeder Block Diagram 1 of 2 9 24 550 Sheet Feeder Block Diagram 2 of 2 9 25 Duplex Unit 9 26 Duplex Unit P J Table 9 2...

Page 461: ...trical relationships between components and assemblies within the printer Each wire in the block diagram is tagged with a signal name and each wire is terminated at both ends with a pin number Locatio...

Page 462: ...aser Printer Service Manual 9 3 Wiring Diagram Notations The wiring diagrams in this section use the following circuit notations to describe components and signal paths within the printer Wiring Diagr...

Page 463: ...1 Connects the Fuser to the HVPS P J331 J16 Map 1 Connects the Size PWB to the Engine Logic Board P J641 A24 Map 1 Connects the Turn Clutch to the Feeder PWB P J651 A25 Map 1 Connects the Feed Clutch...

Page 464: ...Laser PWB to the Engine Logic Board P271 C44 Map 2 Connects the Engine Logic Board and HVPS to the Fuser J272 Not shown Located on the Fuser Connects the Fuser to the Printer P J281 K41 Map 2 Connects...

Page 465: ...9 6 Phaser 4400 Laser Printer Service Manual Base Engine P J Maps Base Engine P J Location Map 1 of 2...

Page 466: ...Phaser 4400 Laser Printer Service Manual 9 7 Base Engine P J Location Map 2 of 2 910 1 910 1...

Page 467: ...9 8 Phaser 4400 Laser Printer Service Manual Base Engine Block Diagrams Base Engine Block Diagram 1 of 4 1...

Page 468: ...Phaser 4400 Laser Printer Service Manual 9 9 Base Engine Block Diagram 2 of 4 2...

Page 469: ...9 10 Phaser 4400 Laser Printer Service Manual Base Engine Block Diagram 3 of 4 3...

Page 470: ...Phaser 4400 Laser Printer Service Manual 9 11 Base Engine Block Diagram 4 of 4 4...

Page 471: ...9 12 Phaser 4400 Laser Printer Service Manual Block Diagram Tray 1 Tray 2 and Tray 3...

Page 472: ...aser 4400 Laser Printer Service Manual 9 13 Wiring Diagrams Engine Logic Board to LVPS PWB and Fuser Assembly LVPS PWB to Fan Assembly Front Switch Interlock Assembly 5 VDC PS and Image Processor Boar...

Page 473: ...9 14 Phaser 4400 Laser Printer Service Manual Engine Logic Board to HVPS PWB to Transfer Roller Print Cartridge and Fuser Assembly Engine Logic Board to Fuser Assembly...

Page 474: ...Phaser 4400 Laser Printer Service Manual 9 15 Engine Logic Board to Stack Full Sensor and Rear Interlock Switch...

Page 475: ...9 16 Phaser 4400 Laser Printer Service Manual Feeder PWB to Low Paper Sensor Stack Height Sensor Feed Clutch Assembly Turn Clutch Assembly and Motor Assembly Diagram 1 of 2...

Page 476: ...Phaser 4400 Laser Printer Service Manual 9 17 Engine Logic Board to Size 1 PWB to Feeder PWB Diagram 2 of 2...

Page 477: ...9 18 Phaser 4400 Laser Printer Service Manual Engine Logic Board to Main Motor Assembly Exit Motor Assembly and Print Cartridge Sensor Assembly...

Page 478: ...Phaser 4400 Laser Printer Service Manual 9 19 Engine Logic Board to Connector PWB to MPT No Paper Sensor Registration Sensor Registration Clutch Toner Sensor Pick Up Solenoid...

Page 479: ...9 20 Phaser 4400 Laser Printer Service Manual Engine Logic Board to Laser Assembly...

Page 480: ...Phaser 4400 Laser Printer Service Manual 9 21 Image Processor Board to Front Panel...

Page 481: ...the Feeder PWB P J 67 B4 Connects the N MOT Harness Assembly to the Feeder PWB J 521 E8 Connects the Size Option Harness Assembly to the Printer Assembly Size 1 PWB P 531 E9 Connects the Harness Asse...

Page 482: ...Phaser 4400 Laser Printer Service Manual 9 23 550 Sheet Feeder P J Map 550 Sheet Feeder P J Map...

Page 483: ...9 24 Phaser 4400 Laser Printer Service Manual 550 Sheet Feeder Block Diagram 1 of 2...

Page 484: ...Phaser 4400 Laser Printer Service Manual 9 25 550 Sheet Feeder Block Diagram 2 of 2...

Page 485: ...PWB P J 37 H8 Connects the Duplex Sensor Assembly to the Duplex PWB P J 38 G7 Connects the Duplex Motor Assembly to the Duplex PWB P J 39 G7 Connects the Duplex Option Harness Assembly to the Duplex...

Page 486: ...Phaser 4400 Laser Printer Service Manual 9 27 Duplex Unit P J Map...

Page 487: ...9 28 Phaser 4400 Laser Printer Service Manual Duplex Unit Block Diagram...

Page 488: ...Phaser 4400 Laser Printer Service Manual 9 29 Engine Logic Board to Duplex PWB...

Page 489: ...9 30 Phaser 4400 Laser Printer Service Manual Duplex PWB to Duplex Motor Assembly Duplex Sensor Assembly and Duplex Home Sensor...

Page 490: ...tor Drive Assembly to the Stacker PWB P J 223 E6 Connects the Offset Motor Assembly to the Stacker PWB P J 224 E7 Connects the Stacker Harness Assembly SNR to the Stacker PWB P J 225 E6 Connects the S...

Page 491: ...9 32 Phaser 4400 Laser Printer Service Manual Stacker P J Map...

Page 492: ...Phaser 4400 Laser Printer Service Manual 9 33 Stacker Block Diagram...

Page 493: ...9 34 Phaser 4400 Laser Printer Service Manual Engine Logic Board to Stacker PWB...

Page 494: ...Phaser 4400 Laser Printer Service Manual 9 35 Stacker PWB to Stack Full Sensor Stacker Home Sensor Stacker Exit Sensor Assembly and Direction Solenoid...

Page 495: ...9 36 Phaser 4400 Laser Printer Service Manual Stacker PWB to Drive Motor Assembly and Offset Motor Assembly...

Page 496: ...Envelope PWB P J 413 C7 Connects the Clutch Harness Assembly to the Envelope PWB P J 414 C7 Connects the No Paper Harness Assembly to the Envelope PWB P J 415 H8 Connects the No Paper Harness Assembly...

Page 497: ...9 38 Phaser 4400 Laser Printer Service Manual Envelope Feeder P J Map...

Page 498: ...Phaser 4400 Laser Printer Service Manual 9 39 Envelope Feeder Block Diagram...

Page 499: ...9 40 Phaser 4400 Laser Printer Service Manual Envelope Feeder Wiring Diagrams Engine Logic Board to Connector PWB to Envelope PWB...

Page 500: ...Phaser 4400 Laser Printer Service Manual 9 41 Envelope PWB to Envelope Exit Sensor Assembly No Paper Sensor and Clutch...

Page 501: ...9 42 Phaser 4400 Laser Printer Service Manual...

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