Laserjet 4 and 5 series Troubleshooting process
Contents
1. Figure 7 3 PS1 and PS3 Paper Path Sensors amp PS5 Paper End Sensor When troubleshooting paper jams the door associated with the sensor must be opened and closed to clear the jam message For instance if PS3 Exit Sensor detected the paper jam and the jam was cleared through a method other than opening the rear door the message remains in the display until the rear door is opened and closed Likewise the top cover must be opened before a jam detected by PS1 is cleared The DC Controller monitors these sensors and detects both the leading and trailing edge of the paper to verify that the paper clears the sensors in the allotted time If the paper does not arrive at or clear the sensors in the allotted time the DC Controller senses a paper jam The paper jam information is transferred to the Formatter PCA which displays the i message Note also that if PS5 MP Tray or Tray 1 Paper End Sensor on the Sensor PCA is bad Figure 7 3 item 3 a paper jam will be reported when paper is fed from the MP Tray or Tray 1 7 20 Troubleshooting Table 7 7 Jam Location Input Area Jams Sensed by PS1 Registration Area Jams Sensed by PS1 Lower Cassette Paper Jams Sensed by PS1 Fuser Assembly Jams Sensed by PS3 False Paper Jams Paper Jam occurs when the last sheet of paper is fed from the tray Paper Jam Troubleshooting Checklist Checks and Action Required2. voor YATIOWLNOO 151999 215 GION310S 4 90er 60er VOd 54 uosNas LNO dO IHAN3 3dOT3AN3 e orr TVNOLLdO S3100OW WWIS 9 1 0 1 I SIN VOd 7091405 Sd YOLOW uOSN3S MEE i uasvi er Ler orr er OIN 1 TWIHAS 1 18 GION31OS 1e 4ese ONIYIM H3 LNIHd Main Wiring Diagram LJ 4 5 only 7 20 igure ing 68 Troubleshooti 7 Voltage Test Points The operating voltages of the printer can be verified by 1 Listening for the exhaust fan A rotating fan indicates that the 5 VDC and 424A VDC voltages are present The fan runs on 24A VDC The 5 VDC enables the 24A VDC 2 Listen for the Main Motor If the Main Motor runs the 24B VDC is enabled therefore 24A VDC must be present Measuring the DC Voltage Levels The DC voltage levels can be measured directly on the DC Controller TB 201 TB 201 connects the DC Controller with the Power Supply See the Main Wiring Diagram
3. Transfer Roller 2 1 8 inches 54mm ase Upper and Lower Fusing Roller LJ4 ONLY 2 1 2 inches 63mm ge Upper and Lower Fusing Roller LJ 4 Plus 5 3 1 8 inches 79mm EP E Cartridge Photosensitive Drum 3 11 16 inches 94mm Figure 7 19 Repetitive Defect Ruler Troubleshooting 7 67 39VETOA INIT 10310 39VEIOA LAdNI LOLMS ino 298 21 m ab JLLISSYO S3HOLIMS Xiddns 9 j NNOILdO 3ZIS SSVO ej your d be INYA HOLON 7 5 HOSN3S HOLOW 809 LSIDSY LNdNI 909 OWH3H L gina uasnd AIGWASSV ONISNA SSHOLIMS 3215 5572 OHLNOO H3dvd 209 HOLIMS roor eS 047 HOSN3S LNO ZSd LNO uddvd 1 Od 954 HOSN3S 20 HOSN3S 21 AlddNS 1 HOSN3S MO T1UW3NOL ADCIYLYVS LOANNOO
4. LaserJet 5 Error The LaserJet 5 5M 5N printer has error messages that are similar to the LaserJet 4 4M 4 4M Use the following table to look up the LJ5 error and take the recommended action If the re mmendation is to see another error for example See 82 gt look up the recommendation for that error in the PH Message Troubleshooting section Tables 7 1 and 7 2 Note The LaserJet 5 printer s key replaces both the keys previously used to resolve some of the temporary errors in the LaserJet 4 and 4 Plus printers Note For any LaserJet 5 error message preceded with a number from 20 through 81 look up the equivalently numbered message in Table 7 1 and proceed as directed Message on LJ 5 5M 5N Recommendations The received data is waiting for a form feed Takes the place of the indicator on the LJ4 See i See Indicates that an envelope feeder has been installed that is not compatible with the LJ5 Press to clear the error The feeder will not appear in any control panel or PJL messages LaserJet 5 Error Map 7 A Message on LJ 5 5M 5N Recommendations Indicates that a lower cassette has been installed that is not compatible with the LJ5 Press to clear the error The tray will not appear in any control panel or PJL messages See See Se Se See W4 7 JOB 300 page protect size See See Se See
5. gt RABCDEFGH JK LM 0123456789 7GABCDEFGHI JKL MNOPQRSTUVWXYZ abcdefghi jk Lmnoparstuvuxyzt 3 14 0123456789 8ABCDEFGHI JKLMN 701234567893 9ABCDEFGHI JKLMNOPORSTUMMIXY2 abcdefghi jk imnoparstuvwxyz gt 3 70123456789 0123456789 JKLMNOPQRSTUVWXYZ J Yebcdefehi iklmnoparstuvnxyz 2 1 gt 7QABCDEFGH I JKLMNOP 40123456789 gt TGABCDEFGHI JKLMNOPQRSTUVWXYZ Yebedefahi jkl mnopqrstuvwxyzt 281 012545678 2GABCDEFGHI JKLNNO 0123456789 lt gt FGH I JKLMNOPORSTUVWXYZ X abedefghi jkLmoperstuvixyz C 5 X8 0123456789 lt gt 9 RABCDEFGHI JKLMNOPCR 0123456789 2 8ABCOEFGHI JKLMNOPQRSTUVWXYZ abcdefghi jkLmnoparstuvuxyz C 7 81 HSE Cy e 0123456789 c 28ABCDEFGHI JKLMNOPQRST 123456789 lt gt 7 ABCOF FGHI JKLMNOPORSTUVUMY2 abcdefghi jkLmnoparstuvwxyzt 2 1 554 0123456789 lt gt GH LJKLHNOPORSTI 25456789 GABCDEFGH I JKLMNOPORSTUVWXY2 abcdefohi 1 1 2 1 fiie C 01234567893 lt gt JKLMNOPORSTI JABCDEFGH I JKLMNOPQRSTUVWXYZ abedefsh tuvuxyzc 2 2 iid C 7012365678 7 BABCDEFGH I JKLMNOPGRS TU 7BABCDEFGHI JKLMNOPORSTUVWXYZ abcdetghi jkUmnopqrstuvuxyzt 3 8 01234567
6. Check that the Transfer Roller is fully seated and shows no sign of wear Check that the Toner Cartridge is fully seated Check that the cassettes are not overfull and the media is loaded correctly Ensure that the media meets specs media is not too smooth or rough and it has been stored properly Ensure that the paper tray is fully seated especially if printing from the Lower Cassette Ensure that the spring force of the Lower Cassette is set correctly If paper is damaged at the Registration Sensor PS1 check that the Transfer Charge Roller is properly seated The LC Tray Tray 3 is not fully seated into the printer Seat the LC Tray firmly into the printer The Lower Cassette feed pressure spring force adjustment is incorrect Set the spring force as shown in Chapter 3 Check that the Fuser Pressure Roller Levers are down LJ4 and 4 Plus Only Check that the Exit Sensor Arm PS3 is free throughout its travel and that the Exit Sensor Arm is installed correctly PS1 PS3 or PS5 are damaged or mechanically broken The sensor wires are damaged or disconnected The rear door is open Paper out sensors in the paper tray or envelope feeder may be defective or the sensor flags may be broken or missing PS2 is the sensor for the PC Tray Tray 2 PS4 is the sensor for the MP Tray Tray 1 PS6 is the sensor for the LC Tray Tray 3 and PS7 is the sensor for the Envelope Feeder Troubleshooting 7 21 P
7. The 24B VDC supply is used to power the High Voltage Power Supply Assembly A summary of the major components of the high voltage system is given in the table below see Figure 7 18 for High Voltage PCA layout Table 7 29 High Voltage System Checks Are the connectors for the Primary Visually inspect each item If any are Charge roller Drum Ground Developing damaged correct as necessary Replace Bias Toner Level Sensor damaged the High Voltage Power Supply if the corroded dirty or missing Also check connection is not repairable Check that the Toner Cartridge all wires are connected to their respective terminals Are the HVPS connections bent or Clean the terminals with alcohol only broken Troubleshooting 7 51 Interface Troubleshooting This section provides an overview of the printer interface requirements Refer to Chapter 3 for detailed information about the printer interfaces and configuration Communications Check Note Communication problems are normally the customer s responsibility Time spent attempting to resolve these problems may not be covered by the product s Hewlett Packard warranty The Customer Service Center CSC is available to the customer to help them through these problems The CSC telephone number is 208 323 2551 If the printer is not connected to an MS DOS based host proceed to the Communications Checks table in this section Test Message After the printer i
8. and Figure 7 16 or 7 17 the DC Controller PCA Layout in the previous section Remove the Formatter cage to access the DC Controller The voltages on TB201 are as follows Table 7 39 TB 201 Voltages vo res Figure 7 21 TB 201 Voltages Troubleshooting 7 69
9. tucked in the tray s retainers Check the paper tension adjustment on the optional Lower Cassette if attached Refer to procedure in Chapter 3 Reseat the DC Controller and Formatter PCA Connections Vertical Sync Late VS Signal 4 Reseat the DC Controller and Formatter PCA connections Undetermined Cause See Figures 7 11 through 7 17 for connector locations 7 28 Troubleshooting 50 SERVICE Error Fuser Malfunction Warning The Fuser Assembly is HOT Allow the assembly time to cool before servicing The purpose of the fusing system is to maintain a constant temperature on the fuser roller A high intensity fusing lamp located inside the fuser roller provides the high temperature required for the fusing process While the printer is in standby mode a temperature of approximately 172 C is maintained on the fuser roller While the printer is in printing mode a temperature of around 183 C is maintained The main components of the Fuser Assembly are the fusing lamp and its associated fusing and pressure rollers a thermistor thermoprotector and the AC controller safety circuitry in the AC Power Supply The fusing lamp is a specially designed 460 watt 220V or 500 watt 115V halogen lamp that operates at line voltage The thermistor is a resistor whose value changes with temperature At room temperature the resistance value of the thermistor should be between 180k ohms and 280k ohms The thermoprotector is a switch
10. 7 30 Troubleshooting 7 53 Communications Checks Table 7 30 Is your computer configured to the parameters described in the configuration instructions For Serial Communications only Does the printer s baud rate match that of the computer s communications port Are you using the correct cable for communications between the computer and the printer Are you using the correct RS 232 C protocol 7 54 Troubleshooting Communications Checks These parameters are required to communicate with the printer Verify your computer s communications port configuration matches these parameters Note If these parameters are not set properly they may yield a 40 20 or 22 ERROR on the printer s Control Panel Run the printer s Self Test to verify the baud rate setting At the computer verify that the baud rate is set correctly in any configuration files Note A baud rate problem may cause a 40 ERROR See the cable wiring in Chapter 3 Hint On an RS 232 cable pins 2 and 3 may need to be reversed at the printer end of the cable During the communications handshake the printer transmits both the XON XOFF signal and the DTR signal The DTR Data Terminal Ready signal may be either negative going or positive going DTR polarity is set at the printer s Control Panel The XON may be set to normal only transmitted when data is needed or Robust XON transmitted every second This feature is configurabl
11. Ensure that the Universal Paper tray Selector knob setting matches the installed paper Correct the setting to match tray Ensure that the image is sized correctly formatted for the paper size selected Proceed to the following cassette size Switches functional check Check Switches 603 4 5 if feeding from the PC tray Tray 1 Check switches 851 2 3 if feeding from the Lower Cassette see Figures 7 14 and 7 15 for locations Inspect the tray for damage If damaged replace the tray 7 14 Troubleshooting Cassette Size Switches SW603 SW604 SW605 Functional Check Before beginning this test remove the Lower Cassette Base and the Envelope Feeder Also PS2 PC or Tray 2 Paper Out sensor must be engaged for this test to be performed reliably Push PS2 up towards the rear of the printer with your hand 1 Power ON the printer with removed Wait for the PE message Set PAPER LETTER in the Printing Menu using the Control Panel 2 With PS2 engaged press and hold the lower and upper paper BEG If the display does not the switches Inspect the switch activating mechanism and or replace the Paper Control PCA 3 the test this time setting the paper size to legal FRI and pressing two switches If the printet zes potids with READY all three switches have been tested and verified Note The LaserJet 5 printer will require you to set t
12. TEST PRINT Switch SW604 PC Tray 2 Tray Size Switches 7 62 Troubleshooting Figure 7 15 Optional 500 Sheet Lower Cassette Table 7 35 Optional 500 Sheet Paper Feeder Paper Tray Tray 3 SW852 size Switches Troubleshooting 7 63 1 6 10 201 Figure 7 16 DC Controller PCA Layout LaserJet 4 4M Table 7 36 Mame 5 7 64 Troubleshooting 215 201 d 4 J212 3 1 10 pee Figure 7 17 DC Controller PCA Layout LaserJet 4 Plus 5 Table 7 37 Mame Troubleshooting 7 65 TB403 TB404 Figure 7 18 High Voltage PCA Layout Table 7 38 4401 High Voltage PS Connection To DC Controller PCA via Interconnect PCA TB401 Transfer Roller Contact TB402 Drum Ground Contact 7 66 Troubleshooting Repetitive Defect Template Repetitive print defects usually are associated with a specific roller within the printer or the Toner Cartridge The following templates are provided to help quickly isolate the cause of repetitive print defects Align the first occurrence of the defect with the top of the ruler and measure to the next occurrence of the defect to determine the roller in question When you are certain that your defect pattern matches the pattern of the template replace the indicated roller First occurrence of print defect Primary Charging Roller 1 1 2 inches 38mm Developing Roller 2 inches 51mm
13. deleted during reassembly Ensure that this actuator is installed correctly Is the DC Controller PCA defective Measure the 24 VDC on J201 pins 8 and 9 on the DC Controller see Figures 7 16 and 7 17 for locations If this 24 volts toggles as SW601 is activated replace the DC Controller If it does not replace the Paper Control PCA or the cable Also check J201 6 DOPEN This voltage should be 5 VDC when the printer is open and 0 when the printer is closed If not replace the DC Controller PCA 7 18 Troubleshooting SW601 Functional Check 1 Open the Top Cover Assembly 2 The message 12 PRINTER or CLOSE PRIHTER COVER should appear 3 Close the top cover amp 43 UF message should appear 4 If the messages do not occur check the switch actuator see Figure 7 2 callout 1 on the top cover and check that the plunger that covers the switch is in place see also Figure 7 14 for switch locations 5 Replace the Paper Control PCA gt Figure 7 2 Location of the Top Cover Closed SW601 Actuator Troubleshooting 7 19 13 PAPER JAM Message Paper jams occur when paper fails to arrive at or clear the paper path sensors in the allotted time Paper movement is monitored primarily by two paper sensors These are described below and illustrated in Figure 7 3 1 PS1 the Input Registration Sensor located in the Paper Feed Assembly 2 PS3 Exit Sensor monitors paper in the Fuser Assembly
14. designed for over temperature protection and opens when the temperature reaches 230 C The thermoprotector will not reset when the fuser cools It may be necessary to replace the thermoprotector or fuser assembly if the thermoprotector opens The following conditions result in a fusing error 1 Unable to maintain a temperature above approximately 180 C 2 A temperature above 230 C 3 A condition wherein a temperature of 165 C is NOT reached within 90 seconds after power up Note E error message is displayed turn the printer OFF for at least 10 minutes Failure to wait the full 10 minutes before turning the printer ON results in a continuation of the error message and the shutting off of the fuser lamp current during this time though the source of the error may have already been resolved Troubleshooting 7 29 Table 7 10 50 SERVICE Fuser Malfunction Checks Is the Fuser Assembly correctly seated Is the Fuser Bulb Thermoswitch open Is the Thermistor defective Does the error persist Reseat the Fuser Assembly Allow adequate time for the error message to clear 10 minutes and turn the printer ON The fuser bulb and thermoswitch are wired in series To check if one or the other is defective perform the following Remove the Fuser Assembly from the printer Use an ohmmeter and measure the continuity between pins see Figure 7 6 callout 1 It should read about 2 ohms about 4
15. optional envelope feeder or the feeder is empty Envelope size may be a or Load the correct envelope size into the tray or press to use the size of media installed in the feeder An accessory cartridge was removed or replaced while the printer was on line This message appears even if the cartridge was not used Power cycle the printer to clear this message Ensure that the printer is off line when the cartridge is removed or installed If a font cartridge is not recognized verify that it is installed correctly An accessory cartridge was removed while the printer was in an error state To clear this message insert the cartridge clear any error conditions then remove the cartridge Press 77 onthe LJ5 Press on the LJ5 7 8 Troubleshooting Table 7 1 Printer Messages continued Symptoms and Recommendations An accessory cartridge was installed while the printer was in an error state To clear this message remove the cartridge clear the pending error condition then install the cartridge This message is displayed when there is a request for a manually fed envelope envelope size may be Insert the appropriate envelope size into the MP tray Tray 4 andpress to print This message is displayed when there is a request for nually fed media Paper size may be or 84 Insert the appropriate media size into the MP tray and press 22220 to print press feed from the Pap
16. size 6144K bytes Page Count 5875 Firmeare Datecode 19920415 Cartridge Installed NO Paper Trays MP TRAY LETTER PC TRAY LETTER Installed Options LC TRAY EE TRAY COMO Installed Personalities PCL 19920414 POSTSCRIPT 19920424 lt gt 7 ABCDEFGH I JKLNNOPORSTUVWXYZ XJ _ abcdetghi JkLmnoparstuvixyz 2 8 iS On 0123456789 lt gt 7 ABCDEFGHI JKLMNOPORSTUVVXYZ X1 abcdefghi jkLmnopqr s tuvixyzt 12 Cyn 70123456789 lt gt 70AB COEF 40123456789 lt gt 8ABCDE FGH JKLMNOPORSTUVWXYZ abcdefghi jk mopar stuvuxyzc 3 8 38 C e 0123556789 lt gt 28ABCDE 012345678 78ABCDEFGHI JKLMMOPQRSTUVWXYZ abcdefohi IkLmoparstuvwxyz C if 87 C 0123456789 c 2 8ABCDEFGHI 10123456789 c HABCDEFGHI JKLMNOPQRSTUVWXYZ _Sabcdefghi jkLmopqrstuvuxyzt 3 1 987 0123456789 2 BABCDEFGHI J y 7 BABCDEFGH I IKLMNOPORSTUVURY2 A S abcdefghi jk Lmoparsituvwxyz 2 1 SR C4 0123456789 7 8ABEDEFGHI JD 0123456789 lt gt HABCOEFGH JKLMNOPQRSTUVWXYZ _Sabedef gh i jkumopqrstuvuxyz1 3 145261 012345578 PAAICDEFGHI JKL 0123456789 lt gt 7 ABCDE FGH JKLMNOPORSTUVWXYZ Nj _Tabedefgh i jklmnopqrstuvwxyz 2 Cy 0123456789 GABCDEFGHIJKLM 0123456789 lt gt ABCDEFGH I JKLMNOPORSTUVWXYZ JkUmnoparstuvwxyzc 2 70123456789 lt
17. 89 7 ABCDEFGHI JKLMNOPQRSTUM 8ABCDEFGNI JKLMNOPORSTUVUXYZ A abcelefgh i jkLmnoparstuvwxyz JB 818 0125456789 lt gt gt 8 JKLYNOPCRSTUVWXY ms C ETROAKDS 11000 CSSUVyP uh huh mor UGE V EN i BEA f pel 1OUET BOARDS T amp 50 1 1 pa AY 100555 SUTyrb AAEEETI 7006 Yy 1 BOAARDET Gas SUASDUTCOUA i aa BOARDS tO06oS SOT yp AREER 7 00 fy Colin Lea i G ETROAAaD 611 famAYOUE Th ARGDA 16665580 Vybb AIPM t v AMEEETI T OE Ty Cc ln i OLE ROAD 169 T ODOGSEDVybb T Wit YY C A IA TOR f ge ADU 8 10 ORS LODSSSEUV YP m AABEETI 77 7 LOE Vy GNAI 24576568086 6 TORS foa A GUE 30 1 10064 2 75 7cm Figure 7 9 PS5 Test Sheet Troubleshooting 7 45 Table 7 25 Dirty Primary Charge roller Change th
18. AME TYPE RCVD UNKNOWN EN 802 2 81618 UNKNOWN EN II 194202 0F2767C8 EN 802 3 2111821 ETHERTALK STATUS INITALIZING ETALK NET 395 MODE 129 P2 LTALK NET 0 MODE 222 APPLETALK NAME ETALK ZONE BSO Office2 Defaul t TCP IP STATUS 3E BOOTP IN PROGRESS HOST NAME NOT SPECIFIED CONFIG BY BOOTP IP ADDRESS 0 0 0 0 SUBNET MASK NOT SPECIFIED DEF GATEWAY 0 0 0 0 SYSLOG SERVER NOT SPECIFIED IDLE TIMEOUT SECONDS 90 SNMP GET CMTY NAME SNMP SET CMTY NAME BOOTP SERVER CONFIG FILE DLC LLC STATUS MIO Staus Information on the Self Test Printout 7 10 igure F ing 58 Troubleshooti 7 Troubleshooting Aids Component Locations The following illustrations help you quickly find the parts discussed in this chapter Figure 7 11 Major Assembly and Connector Locations Table 7 31 ume wm Troubleshooting 7 59 Figure 7 12 Major Assembly and Connector Locations 2 of 3 Table 7 32 Laser Scanner Assembly DC Controller PCA Interconnect PCA Assembly Paper Control PCA High Voltage Power Supply PCA Exit Sensor Assembly 7 60 Troubleshooting Figure 7 13 Table 7 33 Power Supply Assembly Envelope Feeder Main Motor M4 Lower Cassette Drive PCA Lower Cassette Main Motor Troubleshooting 7 61 Figure 7 14 Switch Locations Table 7 34 SW101 AC Input ON OFF Switch Power Supply Assembly SW 601 Top Cover Open Sensing Switch SW602
19. PCA detected a motor failure The Main Motor drives all moving components in the printing process The Main Motor is a 4 phase DC servo motor controlled by the DC Controller PCA The formatter detects a Main Motor failure when The Main Motor does not come up to speed within one second of receiving drive voltage The Main Motor deviates from the correct speed for one second after reaching the correct speed Main Motor Functional Checks nspect the gear train for debris that would block the free operation of the gears Check the gears in the Toner Cartridge for wear and binding Reseat J211 or J214 on the HP LaserJet 4 Plus 4M Plus on the DC Controller PCA and the main connector on the Main Motor Assembly Refer to Figures 7 16 and 7 17 for the DC Controller PCA connector locations If the problem persists check that the 24B Voltage is present on the DC Controller If the voltage is not present replace the DC Controller If the voltage is present and the motor does not rotate replace the Main Motor Assembly see Figure 7 11 for location Troubleshooting 7 33 58 or 57 2 SERVICE Fan Failure The 58 E indicates that the DC Controller detected a failure in the Exhaust Fan FM1 in the printer or the optional duplexer When troubleshooting this problem perform the following steps in the order given 1 Check that the fan is mounted correctly in its shroud 2 Check that the fan blades are no
20. S1 Input Registration Sensor Check 1 Fowe ON th rinter wi h the top cov 1 or 2 bm PS1 by taping it down a For the LaserJet 5 install the toner cartridge 3 Close the top cover The message should display 4 After ihe fuser v warms up the main motor should turn on pen Wait for the message 5 The 1 i4 message appears if the sensor is working correctly 6 If the i message does not appear check that PS1 was fully engaged then replace PS1 7 Remove the tape from PS1 install the Toner Cartridge and close the top cover 8 The gc hould change from amp ZF to Ifthe i message 2 replace PS1 Figure 7 4 PS1 Input Registration Sensor 1 22 Troubleshooting PS3 Exit Sensor Check 1 Open the rear door cover of the printer i4 or The display should change from a If the message does not appear check that the rear door is not damaged and the the door closes and latches properly b If the 3 message does not appear replace PS3 Pickup Motor Functional Test M2 There is not a good method with which to access the test points around the Pickup Motor M2 circuit Therefore when troubleshooting Pickup Motor failures perform the following in the order listed see Figures 7 11 and 7 12 for component location 1 Reseat J601 and J602 on the Paper Control PCA 2 Reseat J201 on the DC Controller J703 on the Sensor PCA 3 Verify that the Pap
21. This message is displayed whenever the device is in the process of flushing the pipeline so it can go offline or into the menus Takes the place of the flashing indicator See See This message is displayed while a flash file system page is being formatted and printed Upon successful completion the device returns to an online and ready state Se This message is displayed whenever the device is actively processing a user s job Takes the place of the flashing Ready indicator Se See 7 B LaserJet 5 Error Map Message on LJ 5 5M 5N Recommendations Indicates Tray 2 or 3 has run out of paper and has not been selected as the current job s paper source If the problem persists check for a binding sensor flag or replace the appropriate sensor 1 gt Size See Tray 1 or Envelope Feeder LaserJet 5 Error Map 7 C 7 D LaserJet 5 Error Troubleshooting Pre Troubleshooting Procedures Preliminary Operating Checks Prior to troubleshooting a specific printer problem you should ensure that The printer is being maintained on a regular basis as described in Chapter 4 The customer is using acceptable media as specified in the User s Manual The printer is installed on a solid level surface The line voltage does not vary more than 10 from the nominal rated value as specified on the Power Ratin
22. adry area Replace the transfer roller Table 7 27 Background Scatter Defective Toner Cartridge The Toner Replace the Toner Cartridge Cartridge may be internally damaged Bad paper lot The paper moisture Try a different paper lot see the HP content conductivity or surface finish LaserJet Family Paper Specifications may be incompatible with the Guide for paper specifications electro photographic process Print density set incorrectly If the print Adjust the print density density is set incorrectly background scatter can result particularly with envelopes Inside of printer dirty If toner dust leaked Clean the inside of the printer out of the EP Toner Cartridge this problem can occur Troubleshooting 7 47 Table 7 28 White or Blank Pages Defective laser shutter Check the laser shutter for free operation when inserting the EP Toner Cartridge EP Cartridge Support damaged improperly positioned or missing Toner Cartridge No toner is available for print No Transfer Roller voltage Without transfer charge roller voltage toner cannot be attracted from the surface of the drum to the paper No Developing Bias With no Developing Bias charge toner is not attracted to the drum No drum ground path With no ground path the drum cannot discharge The negative charge on the drum repels toner and leaves a white page Bad Laser Scanning Cable Assembly Low level signals exchanged between th
23. and wiring Reseat or Controller properly seated replace cables if necessary 2 Is the Laser Scanner Assembly A defective Laser Scanner Assembly can Defective cause a 5 by spinning the scanning mirror at the wrong speed Replace the Laser Scanner Assembly 3 Is the DC Controller Defective Replace the DC Controller 4 Has the printer been moved from a Allow the printer to stand 6 hours until cold to a warm room any condensation has dissipated Troubleshooting 7 31 52 ERROR Scanner Malfunction The scanner motor is a flat brushless DC motor Motor operation is completely controlled by the DC Controller The scanner motor is enabled when the printer is powered up during the printer s power on self test or whenever the PRINT command is received by the Formatter PCA The scanner motor makes a distinctive sound when starting The sound can be described as a variable pitch whirring sound Listen for the sound of the scanner motor when troubleshooting the Laser Scanner Assembly Functional Checks Initiate a Self Test As the test begins listen for the sound of the scanner motor If the motor cannot be heard perform the following in the order given 1 Check the Laser Scanner and the Power Supply cables Replace if necessary 2 Replace the Laser Scanner Assembly 3 Replace the DC Controller 7 32 Troubleshooting 57 or 57 1 SERVICE Message Main Motor Failure The 57 E indicates that the DC Controller
24. ct Ruler Figure 7 19 Troubleshooting 7 41 Table 7 20 Smeared Print Improper Fusing Fuser levers not in place The Fuser Assembly has shipping levers All LU4 some LJ4 N A on LJ5 that must be lowered during the setup process See Chapter 3 for instruction on how to lower the fusing levers Media The media may not be acceptable Verify that the media meets for laser printing Heavy paper stock isa specifications as shown in the HP common cause of smeared print and LaserJet Family Paper Specifications improper fusing Guide Dirty Fuser Assembly The print smears if Replace the Fuser Assembly and clean the Fuser Assembly is dirty the printer Bent Static Teeth If the static teeth are If the teeth are bent or defective replace defective the print could smear prior to the Static Teeth Assembly the paper entering the Fuser Assembly Worn Gears If the drum and paper are Replace the Toner Cartridge not moving at the same speed the characters may smudge Foreign object in paper path Something Remove any foreign material Try new is smearing the unfused toner image on Toner Cartridge the surface of the paper Orange Packing Spacers not removed Remove Orange Packing Spacers Some HP LaserJet 4 only Table 7 21 Distorted Print Paper Path If the paper does not move Examine the paper transport rollers at a uniform speed the print image will along the paper path for wear Replace if be affected Character
25. d humidity conditions may develop this problem Table 7 17 Random Horizontal Black Lines Laser Scanning Assembly misaligned Replace the Laser Scanner Assembly damaged DC Controller PCA Replace the DC Controller PCA Table 7 18 Vertical White Streaks 1 No toner is available for print or the Shake the EP Toner Cartridge replace toner level is low the cartridge if the problem persists 2 The lenses within the Laser Scanning Replace the Laser Scanning Assembly Assembly may be contaminated blocking or diffusing the laser light 7 40 Troubleshooting Table 7 19 Repetitive Defects Toner Cartridge The circumference of Replace the Toner Cartridge the photoconductive drum is 3 75 inches 94mm The circumference of the developer roller is 2 inches 51mm If a defect appears in the print image at these intervals assume the defect is associated with the Toner Cartridge Fuser Assembly The Fuser Roller s Clean the Fuser Assembly rollers circumference is approximately Replace the assembly if necessary 2 5 inches 63mm for the LJ4 and 3 1 8 79mm for the LJ4 5 If a defect appears at this interval assume the defect is associated with the Fuser Assembly Dirty Roller Any dirty roller along the Examine and clean rollers along the paper path may result in a pattern of paper path repetitive print image defects For further information on interval dimensions refer to the Repetitive Defe
26. e Laser Scanning Assembly and the DC Controller may be affecting laser output 7 48 Troubleshooting Refer to item 4 in Figure 8 4a Guide must be installed properly above the EP Cartridge between the laser shutter opening and the fuser stop plate Remove sealing tape or replace the Toner Cartridge Perform the Half Self Test Functional Check which follows to check all other electro photographic processes Refer to High Voltage System Checks Refer to High Voltage System Checks Replace the Laser Scanning Cable Assembly Image Formation Troubleshooting Half Self Test Functional Check The electro photographic process can be subdivided into the following stages Cleaning Physical and Electrostatic gt Conditioning Primary Charge Roller Writing Laser Modulation Development Formation of the Toner Image Transfer Charge to transfer the image to paper The purpose of the Half Self Test Check is to determine which process is malfunctioning Perform the test as follows 1 Initiate 2 switch OFF the aoe after the paper advances halfway through the printer the leading edge of the paper should advance at least past the Transfer Charge roller 3 Remove the Toner Cartridge 4 Open the Toner Cartridge s drum shield to view the drum s surface If a dark and distinct toner image is present on the drum s surface assume that the first four fu
27. e Toner Cartridge Replace the Toner Cartridge Change type of media Vertical Dark Streaks Bad Toner Cartridge Incompatible media During media manufacture inks or other finishing processes may interfere with the electro photographic or fusing process Table 7 26 Defective laser shutter Check the laser shutter for free operation when inserting the EP Toner Cartridge Large Print Voids EP Cartridge Support damaged improperly positioned or missing Refer to item 4 in Figure 8 4a Guide must be installed properly above the EP Cartridge between the laser shutter opening and the fuser stop plate Bad transparencies Transparencies exhibit this problem if they are not Use Hewlett Packard approved transparencies refer to the HP LaserJet designed for proper toner adhesion Bad paper lot The surface of the paper may be too smooth for proper toner adhesion Poor fusing Toner may not be fused properly to the media Print image fusing may not occur correctly Wet paper The paper may be damp Transfer roller is dirty 7 46 Troubleshooting Family Paper Specifications Guide Try a known good paper from a reliable source refer to the HP LaserJet Family Paper Specifications Guide Try a known good paper from a reliable source refer to the HP LaserJet Family Paper Specifications Guide Replace Fuser Assembly see Figure 7 11 for location Try a new batch of paper Store the paper in
28. e from the Control Panel DTR is available at pin 20 and XOFF is transmitted from pin 2 of the printer Table 7 30 Communications Checks continued eects If using a serial interface is the cable The maximum recommended cable longer than 50 feet 15 meters length for RS 232 serial communications is 50 feet Use RS 422 for the HP LaserJet 4 4 printer or move the printer closer to the host If using a Centronics parallel cable is it Use a serial interface connection or over 10 feet 3 meters long move the printer closer to the host Do all the current Control Panel Make appropriate changes If host Configuration Menu items match the host system changes are made be sure to system s parameters reboot the system or otherwise ensure the changes are in effect Does the printer have a bad interface If possible try a different printer interface port than the one with the problem Reconfigure the printer and host Does the host have bad interface port If possible try a different host system port and reconfigure both the host and printer appropriately If the host system and printer still are not communicating and steps 1 through 9 have been completed replace the Formatter PCA and the MIO card and reconfigure the printer If the problem persists a protocol analyzer may be needed to find the source of the problem Caution HP LaserJet printers are not designed to work with mechanical switch b
29. e non printing portion of Self Test is in progress Wait for Self Test printing Wait for the printer to display the Printing sample characters from available typefaces Wait for the printer to display the message Note the format is different for PCL and PostScript Printing a Typeface List Note that PCL Postscript formats are different Printing a Demonstration Page Note that PCL Postscript formats are different Printing a Configuration Page Appears only with PostScript installed in the printer Press on the LJ5 7 2 Troubleshooting Table 7 1 Printer Messages continued Message Press LJ5 Symptoms and Recommendations Returns all printer settings to Printing Menu settings and clears buffered pages temporary soft fonts and macros Wait for the printer to display the essage See the Reset Menu section in Chapter 3 for more details Printer is initializing non volatile RAM This allows other personalities to access non volatile RAM Returns both Configuration and Printing Menu selections to the factory settings Ensure that the Configuration Menu settings are correct before pl cin he printer on line Wait for the printer to display the message See the Reset Menu section in Chapter 3 for more details Follows a Control Panel selection The printer returns all Printing PCL PS and Job Menu items to the factory settings Clears buffered page data temporary soft fonts and
30. eck MP Tray Paper End Sensor Functional Test 1 Make a test sheet by cutting a notch in the trailing edge of a sheet of paper as shown in Figure 7 9 2 Perform the set up procedures listed for the PS4 check MP Tray Empty Sensor on page 7 17 and ee the test sheet into the MP tray when the display reads 3 The self test print should stop 2 to 5 mm above the Figure 7 9 4 Print that extends into cut out area indicates that the sensor PS5 is not free in its travel or is defective Ensure that the sensor lever is free throughout its entire range of travel If not replace the lever or the sensor itself 7 44 Troubleshooting PRINTING MENU PCL MENU PS MENU COPIES 1 FONT SOURCE I Internal PRT PS ERRS PAPER LETTER FONT NUMBER 0 ORIENTATION P Portrait PITCH 10 00 FORM 60 LIMES SYM SET ROMAN B MANUAL FEED OFF RET MEDIUM 208 MENU CONFIG MENU PARALLEL MENU PAGEPROTECT OFF MP TRAY cass HIGH SPEED RESOLUTION 600 Lock NONE ADV FNCTNS PERSONALTY AUTO CLR WARN TIMEQUT 15 AUTO CONT OFF DENSITY 3 LOW TONER ON SERIAL MENU AUX IO MENU TEST MENU SERIAL RS 232 1 6 SERIAL SELF TEST PACING DTR DSR BAUD RATE 9600 CONT SELF TEST BAUD RATE 9600 HANDSHK ROBUST PCL TYPE LIST DIR POLARITY HI DTR POLARITY HI PCL DEMO PAGE DATA BITS PS CONFIG PAGE PARITY PS TYPEFACE LIST STOP BITS PS DEMO PAGE HP 2B644 SERIAL CENTRONICS FM REV 33 5 MIO REV 4 0 SERIAL RS 232 Formatter Number 504601027 8 RET MEDIUM RAM
31. er Cassette Tray 2 The printer currently has the Lower Cassette or duplexer selected as the paper source and has detected that the Paper Cassette Tray 2 which serves as a paper guide for the Lower Cassette is not installed Install reseat the Paper Cassette The printer received a request for a paper or envelope Siza not available in the printer The is MP Multi Purpose Paper Cassette Lower cassette Paper size may be f tray envelope sizes may be or 85 Load the correct paper tray and or media press touse the media in the installed tray s The printer continues automatically If the problem persists refer to page 7 13 Press LJ5 Troubleshooting 7 9 Clearable Warnings A clearable warning indicates a transient condition in the printer The printer continues on line while the message is displayed in place of A clearable warning appears each time the printer alters resolution or page protection this causes reconfiguration of memory or aborts a job due to an invalid or uninstalled personality or insufficient memory Clear the message by pressing for the LaserJet 5 7 10 Troubleshooting Table 7 2 Clearable Warning Messages Message Displayed The printer received a graphics print file that was too complex to print at the requested resolution The printer automatically processed the file in the highest resolution possible with the memory installed Add addi
32. er Control PCA and the Sensor PCA are firmly seated into one another 4 Replace the Pickup Motor 5 Replace the Paper Control PCA 6 Replace the Sensor PCA Troubleshooting 7 23 Lower Cassette Functional Check When troubleshooting a Lower Cassette failure always prove the failure by removing the Lower Cassette from the printer Next test the printer s ability to move and print media satisfactorily without the Lower Cassette installed The Lower Cassette is a field serviceable item The procedures for removing and replacing the Lower Cassette components are in Chapter 6 Replacement parts for the Lower Cassette Assembly are listed in Chapter 8 After the failure has been associated with the Lower Cassette Assembly perform the following in the order given Test the repair after each replacement 1 Reseat all connectors in Lower Cassette 2 Replace the Lower Cassette Pickup Motor 3 Replace the Paper Control PCA 4 Replace the DC Controller 7 24 Troubleshooting 14 NO EP CART Message The printer detects the presence of the Toner Cartridge and the level of toner present in the cartridge through the condition of the ANTIN signal The ANTIN signal becomes part of the serial data stream used to communicate with the DC Controller see Figure 7 5 for cartridge components Troubleshoot the i4 i or INSTALL TONER CARTRIDGE message as follows 1 Reseat the Toner Cartridge Try a new or known good Toner Cartridge 2 Check
33. g Information Incorrectly SIMM RAM Parity Error LaserJet 4 4m only 9 SIMM ROM Needs To Be Mapped To An Unsupported Address 10 SIMM Address Conflict 11 PDC XROM out of bounds 12 Could not make a temporary mapping 0 1 2 3 4 5 6 7 8 Replace the SIMM device that caused the error Pressing allows you to continue but the SIMM device that caused the error is not configured If the SIMM device has more than one bank of memory the good banks are configured Press on the LJ5 Note Refer to the Product Family Compatibility Matrix in Chapter 1 or for the LaserJet 5 Appendix B to verify correct memory for the printer 7 6 Troubleshooting Table 7 1 Messages continued SERVICE Press on the LJ5 Symptoms and Recommendations Indicates a communications problem between the DC Controller PCA and the Formatter PCA Pressing 00 clears the error and resumes printing Perform the Test Print operation to verify DC Controller functionality If the message persists check for any cable damage and check the DC voltages or replace the DC Controller This message indicates that a main motor failure occurred Power cycle the printer If the error persists first check the connections at the main motor and DC Controller then replace the main motor to clear the error See gt or Sy message This errors indicates the DC Controller detects an exhaust fan failure in either the printer or the
34. g Label gt The operating environment for the printer and paper is within the temperature and humidity specifications listed in Chapter 1 of this manual The printer is never exposed to ammonia fumes such as those produced by diazo copiers or office cleaning materials The printer is not exposed to direct sunlight gt Non HP components such as refilled toner cartridges font cartridges and memory boards are removed from the printer Troubleshooting 7 1 Printer Message Troubleshooting Printer Message Summary Table Table 7 1 is a list of all status attendance error and service messages affecting the printers The table also identifies the action required to correct the situation identified by the message When the action requires removal and replacement of an assembly or PCA refer to the applicable section of Chapter 6 for instructions For general location of components refer to Troubleshooting Aids at the end of this chapter Table 7 1 Printer Messages Message Symptoms and Recommendations Refer to the Blank Display Table 7 3 Proceed printer is ready to use Printer is in Power Save Mode Press any key to take printer out of Power Save mode Receipt of data or an error condition will also take printer out of Power Save mode The job will print when the fuser is warmed up may take up to 45 seconds Printer is off line and not able to receive data Press EE Wait until printer signals ready Th
35. he paper size followed by a self test to generate the equivalent TERY 2 LOAD message Use the 222 key between tests to cancel the Self Test printout Figure 7 1 PC Tray Size Sensing Microswitches Location Troubleshooting 7 15 Table 7 5 Switch Logic for Cassette Size Cassette Cassette Size Sensing Switch SW603 851 SW604 852 SW605 853 Upper Middle Lower Legal Letter No Cassette Paper Size Sensing Lower Cassette The operator must set the appropriate paper size for the Lower Cassette using a dial which in turn activates switches on the cassette base This setting is sent to the DC Controller on the serial data bus SLI The printer posts a E error if the media is different from that selected with the switch To verify proper operation of the LC Tray 3 switches lock out the MP Tray 1 and PC Tray 2 trays in the Config Menu and perform the same test with Lower Cassette switches as was done for the PC tray Tray 2 switches 7 16 Troubleshooting PC Empty Sensor PS2 Functional Check 1 Power on the printer with the PC tray Tray 2 empty 2 Aer the and the iP cycles the FE message appears install the tray gt then message persists replace 3 Add paper to the PC tray auda r 4 The display should read PS4 Check MP Tray Empty Sensor 1 With the printer powered ON the Config Menu from the Control Panel 2 DONE Ue the MP Tray Tray 1 as a casset
36. isplayed when the MIO 2 card is in the process of initializing During initialization the MIO is not active but since the printer supports switching the printer remains on line and this becomes a status message Display clears automatically this may take up to a minute depending upon the card card is not ready See the user s manual for the MIO card The serial and Bi Tronics parallel ports continue to operate normally To clear the display you must remove the card and power cycle the printer The key does not clear the display The MIO card is initializing This is a status message During initialization the MIO is not active but since the printer supports I O switching the printer remains on line Displays clears automatically may take up to a minute depending on the card The MIO card is not ready or not connected to a working network The serial and Bi Tronics parallel ports will continue to operate normally To clear the display switch the printer OFF remove the card and switch printer ON 22200 will not clear the display See documentation for troubleshooting Indicates a memory overflow Too much data is being sent to the printer and the printer has run out of memory Pressing the key causes the printer to print only the information it received If the error persists it may be necessary to simplify the print job such as fewer fonts and less graphics information or have the customer pu
37. k Lines Printimeropar Pesing Distorted Print Figure 7 7 Image Defect Summary 7 36 Troubleshooting Black Pages with Image Skew Horizontal White Strips Vertical Dark Streaks Large Print Voids White or Blank Pages Figure 7 8 Image Defect Summary Improperly Sized Image Background Scatter Troubleshooting 7 87 Table 7 12 Black Pages The HVPS connections are dirty Clean the HVPS terminals see Figure 7 18 for layout The HVPS is installed improperly If the Remove the HVPS and check the HVPS has been removed and replaced for damage Reseat the it may not be seated properly HVPS being certain to fully seat the connectors Bad Primary Charging Roller Replace the Toner Cartridge The HVPS is defective Replace the HVPS DC Controller PCA The laser drive Replace the DC Controller PCA followed circuitry is damaged so that the laser is by the Formatter PCA if required always on Table 7 13 Any Faint Print Condition Printer set to Economode Change driver and or Control Panel settings to F Toner Cartridge Replace the Toner Cartridge Print density set improperly The higher Set the print density to a darker level the print density setting the more toner Replace the high voltage power supply if transferred to the drum this has no effect The paper finish conductivity or Try a known good source of paper from a moisture content may not be suitable for fre
38. nctions of the electro photographic process are functioning and troubleshoot the failure as a transfer problem If NO image is present on the photoconductive drum perform the checks shown on the following pages The Drum Rotation Functional Check High voltage Power Supply Check Troubleshooting 7 49 Drum Rotation Functional Check The photoconductive drum located in the Toner Cartridge must rotate for the print process to work The photoconductive drum receives its drive from the Main Motor gear train To verify whether the drum is rotating 1 Open the printer s Top Cover Assembly 2 Remove the Toner Cartridge Open the Toner Cartridge s drum shield cover to view the photoconductive drum 3 Mark the gear with a felt tipped marker Note the position of the mark 4 Install the EP Toner Cartridge and close the Top Cover The 1 second startup sequence should rotate the drum enough to move the mark Open the printer and inspect the drum Verify that the mark moved If the mark did not move inspect the gear train to ensure that it is meshing with the Toner Cartridge gears If the drive gears appear functional and the drum does not move replace the Toner Cartridge Note This test is especially important if refilled Toner Cartridges were used 7 50 Troubleshooting High Voltage Power Supply Assembly The High Voltage Power Supply Assembly provides the necessary voltages for the printer s electro photographic processes
39. not the same as the computer s For network MIO cards this means there was an abnormal connection break Make sure the printer is set at the same baud rate as the computer Press to clear the error message For network MIO cards see the user s manual for your card A temporary error occurred while printing Press the 22220 key to clear the error If the error persists refer to Message The paper size selection knob or MP paper size does not match the installed paper or more than one sheet of paper was picked up Power OFF the printer for a minimum of 10 minutes If the problem continues refer to the error section Indicates loss of laser beam for over 2 seconds Press 5 clear this error If the error persists refer to the essage section Indicates scanner motor is unable to maintain the proper speed Press to clear this error If the error persists refer to the Scanner Malfunction section Troubleshooting 7 5 Table 7 1 Printer Messages continued Symptoms and Recommendations An error occurred during configuration and validation of SIMM memory X Hardware Type 0 ROM 1 RAM 2 Flash Y Hardware Device 0 Internal Memory 1 SIMM Slot 1 2 SIMM Slot 2 3 SIMM Slot 3 4 SIMM Slot 4 ZZ Error Number Unsupported Memory Unrecognized Memory Unsupported Memory Size Failed RAM Test Exceeded Maximum RAM Size Exceeded Maximum ROM Size Invalid SIMM Speed SIMM Reportin
40. ohms for the 220 volt fuser If an open condition is detected either the fusing bulb or the thermoswitch is defective Replace the defective component refer to Chapter 6 or replace the complete Fuser Assembly Remove the Fuser Assembly and let it cool to room temperature Use an ohmmeter and measure the resistance between pins see Figure 7 6 callout 2 It should read about 220 ohms 40 ohms at ambient room temperature If the thermistor is either open or shorted replace the thermistor refer to Chapter 6 or the complete Fuser Assembly Verify all cabling is correct Replace the following components in the order given Power Supply Assembly DC Controller PCA See Figure 7 11 for Fuser Assembly location and Chapter 6 for removal and replacement as necessary Note The error message can be cleared immediately by shorting the C202 leads on the HP LaserJet 4 4 or the C205 leads on the HP LaserJet 4 Plus 4M Plus 5 5M 5N on the DC Controller Remove the Formatter PCA to access the DC Controller as shown in Chapter 6 7 30 Troubleshooting Figure 7 6 Fuser Assembly Connector 51 ERROR Message and the 4 are caused by Beam Detect failures If the beam detect signal is lost for more than 2 seconds the error is posted as a The 4i can be cleared may be cleared by power cycling the printer Table 7 11 51 ERROR Beam Detect Checks 1 Are all connectors on the DC Inspect connectors
41. optional duplexer See section for more information Printer encountered a parity error when accessing the RAM memory SIMM in slot X If X20 the faulty SIMM slot was not detected Turn OFF the printer then back ON Data stored in printer is lost If the error is still present Turn OFF the printer and verify that the indicated SIMM is correctly installed Turn ON the printer If the error is still present turn OFF the printer and remove the SIMM board Turn ON the printer If the error message does not appear the problem is on the SIMM board if the error still appears the problem is in the printer s internal memory Printer identified a problem while checking its memory X refers to the device the printer was checking when it encountered the error 0 Internal Memory 1 4 SIMM Slot 5 Cartridge If the printer contains a SIMM memory board turn OFF the printer Data stored in printer is lost Verify that the SIMM is installed correctly and turn ON the printer If the error is still present turn OFF the printer and remove the SIMM board Turn ON the printer If the error message does not appear the problem is on the SIMM board The printer found a problem in its internal RAM memory Switch OFF the printer and then switch ON You lose any data stored in the printer If the problem persists replace the Formatter PCA Troubleshooting 7 7 Table 7 1 Printer Messages continued Symptoms and Recommendation
42. or occurs frequently you may need to adjust Resource Saving settings Press the LJ5 Troubleshooting 7 11 Printer Message Troubleshooting Procedures When the following procedures require removing and replacing an assembly or PCA refer to the applicable section in Chapter 6 for instructions Blank Display Table 7 3 Blank Display ees O Is the power on Check the ON OFF switch and verify the power is plugged in Press a Control Panel key to verify problem still exists Is the fan working Ifthe fan is working check the cabling to the Control Panel If the cabling is good replace the Formatter first then the Control Panel If the fan is NOT working measure the DC voltage levels refer to Table 7 39 If the voltage levels are good from the power supply to the DC Controller and the fan is not working replace the DC Controller If the voltage levels are not present at TB1 replace the DC Power Supply 7 12 Troubleshooting MP PC LC Tray 1 2 3 LOAD Message The conditions that result in messages are or T The absence of any input tray The absence of media in either tray The tray size switches may be defective and not recognize the presence of the paper tray The tray is sensed as the tray identifier tabs contact one or more of the three tray identifier microswitches The Universal Tray paper size dial setting does not match the installed paper The fi me
43. ox products without proper surge protection These devices generate high transient voltages that cause permanent damage to the Formatter PCA This circumstance is not covered by the Hewlett Packard warranty Troubleshooting 7 55 MIO Troubleshooting The Self Test Printout and explanation shown on the following pages contain valuable information regarding the current status of the MIO Before attempting to troubleshoot a network problem or notifying your network consultant of a problem always obtain a Self Test Printout Troubleshooting Hints The JetDirect Card Status Block see Figure 7 10 status block 2 indicates the functionality of the JetDirect Card An I O NOT READY STATUS indicates a problem A 2 digit error code follows the message Use the HP JetDirect Network Interface Configuration Guide P N J2552 90001 for detailed explanations of errors and suggested corrective action NETWORK STATISTICS status block 3 indicates network activity Bad packets framing errors unsendable packet and collisions should be minimal If unusually high numbers of these statistics occur please advise the network administrator The various Network Operating Systems supported by these printers are indicated in status blocks 4 5 6 and 7 When the status is READY the printer has successfully connected to the host network server and is awaiting data Other messages indicate the printer is either still trying to successfully connect to the net
44. printer is 1 5mm over 260mm page length Closely examine the gears along the paper path for wear and contamination Clean and inspect the gears Replace any defective gear Verify that the tray is loaded correctly Verify that the paper tray is seated fully into the printer Switch trays to verify that the problem follows the tray Replace the paper tray Change paper Try paper known to be good See Paper Specifications in Chapter 2 Troubleshooting 7 43 Table 7 24 Improperly Sized Image PC tray Microswitches The paper tray microswitches indicate the paper size of the installed tray This information is used to format the print image to the size of the paper installed in the tray If the paper tray microswitches are defective the image is formatted incorrectly PS 5 is defective PS 5 senses the trailing edge of the media being fed from the MP tray MP Paper Size is not set correctly Perform the Cassette Size Switches SW603 SW604 SW605 Functional Check on page 7 15 Ensure that the correct envelope size is selected if appropriate If improperly sized images result from printing from the MP tray check that PS 5 is functioning correctly mechanically and electrically This feature allows odd sized media to be printed with the MP tray Troubleshoot PS 5 as shown in the following procedure Use the MP Paper Size Button on the Front Panel to correctly configure paper size for the MP Tray PS5 Ch
45. rchase additional memory Indicates that the information being sent to the printer is too complex for the printer the formatting capabilities of the printer cannot keep up with the formatting instructions being sent to it by the computer If the error persists it may be necessary to simplify the job reduce the number of characters number of fonts used number of pixels addressed cursor repositions or reduce addressing the same pixel location multiple times This problem can also be resolved by adding at least one additional memory PCA and setting if applicable Press on the 7 4 Troubleshooting Table 7 1 Printer Messages continued Press LJ5 Symptoms and Recommendations For serial Bi Tronics parallel configuration the computer and printer are not communicating because of improper signal protocols This is an I O buffer overrun error Parallel configuration may mean a loose cable connection Serial configuration wrong pacing option may be selected If you are using an RS232 serial connection the HP LaserJet printer uses XON XOFF and DTR signal protocols rather than ENC ACK protocol Press clear the error message data is lost The printer encountered an error while transferring data from the computer For serial configuration the error may have occurred because you turned ON or OFF your computer while the printer was on line or your printer s baud rate or parity was
46. s The printer identified an internal service error If this error appears turn the printer OFF and then back ON If the problem persists replace the Formatter PCA The printer detected an error in the nonvolatile memory NVRAM Press then check your Control Panel settings If the problem persists replace the Formatter PCA The printer s nonvolatile memory is full because new feature sets were installed Power the printer OFF then back ON If the problem persists reinitialize the NVRAM by pressing the key while powering on the printer Reset the page count cold reset paper size display language and all other applicable control panel settings A firmware SIMM problem was identified Remove or HP LJ 4 4 Only replace the firmware SIMM A firmware SIMM problem was identified Remove or replace the firmware SIMM An internal controller error has occurred Power the printer OFF then back ON If this error persists replace the Formatter PCA Remove third party memory if installed May also be caused by driver or application incompatibilities or defective toner cartridge The formatter PCA has been informed of an irrecoverable error by the MIO card Power cycle the printer If the error persists replace the MIO card Formatter manufacturing error Cold Reset the printer If the problem persists replace the Formatter PCA The printer received a request for an envelope size that is not loaded currently in the
47. s Replace any broken or defective gears Verify that the tray is loaded correctly Verify that the paper tray is seated fully into the printer If possible exchange tray with another printer to see if the problem is associated with the tray Note the HP LaserJet 4 4 tray is NOT interchangeable with the HP LaserJet 4 Plus 4M Plus tray The LJ5 paper trays are not compatible with the LJ4 or LJ4 Replace the paper tray If the DC Controller was replaced adjust VR202 as shown in Chapter 6 The HP LaserJet 4 4M Paper Input Assembly is NOT compatible with the HP LaserJet 4 Plus 4M Plus The LJ5 Paper Input Assembly is not compatible with the LJ4 or LJ44 Input Assemblies Installing a non compatible Input Assembly results in paper input registration problems Troubleshooting 7 39 Table 7 15 Right Hand Image Missing No toner available for print Shake replace the EP Toner Cartridge Laser shutter may be blocking the beam Ensure that the mechanism that lifts the shutter is functional for example the shutter doesn t stick in its travel and is lifted evenly Table 7 16 Small Print Voids Small voids on black or near black Replace the EP Toner Cartridge If the printed images may be caused by printer is installed in a hot or humid imbedded toner on the location tell the customer to move the electro photographic drum Cartridges printer to a better location that are run for long periods of time in high temperature an
48. s installed verify communications between the printer and the IBM compatible computer Enter the following at the DOS prompt C DIR gt LPT1 The printer should print a directory listing of the C directory If the Communications Check fails proceed as follows 7 52 Troubleshooting AUTOEXEC BAT Standard Configurations Parallel DOS Commands If the previous check did not produce the desired result ensure that the AUTOEXEC BAT file contains the following statements for parallel interface communications MODE LPT1 P For MS DOS version 4 0 and above enter MODE LPT1 B Note This example assumes that you are using parallel printer port LPT1 If you are using LPT2 or LPTS replace LPT1 in the example with the appropriate printer port If the problem persists proceed to Table 7 30 Communications Checks Serial MS DOS Commands Most IBM compatible computers default to a parallel printer port To ensure that information is sent to your serial printer port type the following MS DOS commands at your MS DOS prompt or include them in your AUTOEXEC BAT file MODE COM1 9600 N 8 1 P MODE LPT1 COM1 For MS DOS version 4 0 or above enter MODE COM1 9600 N 8 1 B MODE LPT1 COM1 Note These examples assume that you are using serial printer port COMI If you are using COM2 or COMS replace COMI with the appropriate printer port If the problem persists proceed with the following checks in Table
49. s that are either excessive wear exists Inspect and too tall or too short in the direction of replace the Toner Cartridge Drive Gear paper motion are usually a result of Assembly Main Motor or Fuser drive mechanism problem Assembly as necessary Laser Scanning Assembly Wavy Replace the Laser Scanning Assembly irregular shaped characters or irregular line margins in the scan direction of printing are usually a result of a defective Laser Scanning Assembly 7 42 Troubleshooting Table 7 22 Laser Scanning Assembly or DC Controller PCA Black Pages with Horizontal White Strips Replace the Laser Scanning Assembly followed by the DC Controller PCA if Table 7 23 Image Skew necessary see Figure 7 12 for locations Input Registration Sensor PS1 The Paper Pickup Roller positions the leading edge of the paper at the Input Registration Sensor PS1 If this sensor is defective it may not sense the presence of the paper reliably on time Drive Gears If any gear within the gear drive train becomes excessively worn or is excessively dirty erratic paper movement would result leading to image misregistration Paper Tray The paper tray may be preventing the paper from freely moving through the printer Paper The surface of the paper may be too smooth for the pickup roller to move the paper through the paper path Paper too heavy Replace the Input Registration Sensor Skew tolerance for the
50. setting Set the Universal Tray and the Lower Cassette Tray paper size as shown in Chapter 3 gt Wrong size paper in tray Check that the Universal Tray and or the Lower Cassette settings match the installed paper An unstable or temporary loss of the Beam Detect pulse This problem normally is accompanied by a partially printed page often with thin horizontal black lines deformed characters or solid black areas Loss or the Beam Detect pulse for more than 2 seconds results in a 51 condition Paper reaching the um Paper Sensor PS1 before it is expected This is accompanied by a blank page This normally is due to paper feed problems Proceed as directed in the following table Troubleshooting 7 27 Table 7 9 41 X ERROR Checks Recommended Action 4 Reseat all connectors on the DC Controller the Laser Noisy Vertical Sync VS Drive PCA the Scanner Connector and the Beam Detect Connector 41 2 Reseat all connectors on the DC Controller Also check the Beam Detect BD Laser Scanning Assembly connections weak or unstable 4 Incorrect size selection on the cassette Paper Multifeed One of the cassettes is overfull Remove the extra paper from the overfull cassette Check the paper for edge damage Improperly cut edges can lock together causing multi feeds Check that the pickup rollers and separation pad are not worn Replace the rollers and pad as a set if necessary Ensure that the corners of the paper are
51. shly opened package Refer to the HP the electro photographic printing process LaserJet Family Paper Specifications Guide for media specifications The transfer roller may be defective Replace or reseat the roller Weak or no developer bias If Adjust the print density setting as shown inadequate or no developer bias is in Chapter 3 produced toner is not attracted to the image written on the drum 7 38 Troubleshooting Table 7 14 Faulty Registration Paper The surface of the paper may be too smooth for the pickup roller to move the paper through the paper path Worn Pickup Roller and Separation Pad PS1 faulty If the Input Registration sensor PS1 is broken it can not sense the presence of paper at the registration point Drive Gears If any gear within the gear drive train becomes excessively worn or dirty erratic paper movement results causing image misregistration Paper Tray The paper tray may be preventing the paper from moving through the printer DC Controller replaced Paper Input Assembly replaced Change paper Try a brand of paper known to be good If the Paper Pickup Roller or the Separation Pad are sufficiently worn the leading edge of the paper may not reach the registration assembly in time Replace the Pickup Roller and Separation Pad together Replace the Input Registration Sensor Examine the gears along the paper path for wear and contamination Clean and inspect the gear
52. ssage is also generated when the user or 2 requests a paper size other than that installed The Paper Sensing Arms are located in the paper input areas of the printer During normal operation the Paper Sensing Arm flags rest on the media installed in the paper tray The Sensing Arm flags are attached to shafts The opposite end of the shaft is a photointerrupter that rotates through the sensors on the Paper Control PCA These sensors are PS4 Paper out MP tray PS2 Paper out PC tray gt PS6 Paper out Lower Cassette PS7 Paper out Envelope Feeder The presence of paper in the paper tray is sensed by the paper sensor arm When paper is in the cassette the sensor arm rests on top of the paper in the tray At this point the sensors are not blocked When the tray is empty the arm swings through its travel The photointerrupter attached to the paper sensor arm shaft rotates and blocks the sensor diode Troubleshooting 7 13 Table 7 4 MP PC LC Tray 1 2 3 LOAD Message Checks on Is media present the tray s Are the proper trays fully inserted in the printer Does the Control Panel s or application s Paper size setting match the tray being used Is the expected tray size being recognized by the printer Are any of the tray identifier tabs broken on either PC Tray 1 or LC Tray 2 paper tray Install media Reseat the cassettes Make sure each cassette is fully seated into the printer
53. t blocked 3 Check that the Cooling Fan connector is firmly seated on the DC Controller see Figure 7 16 or Figure 7 17 for location If the above checks are satisfactory replace the fan Note Verify the direction of air flow Air should blow out of the printer 7 34 Troubleshooting Image Defect Summary The quality of the printer s output is subject to the judgment of the user This section of the manual helps you define print quality defects and understand what factors affect print quality The print samples shown in the following figures illustrate some print quality defects Keep copies of print quality defects encountered in the field with an explanation of their causes for future reference The image defects listed below are covered in the following tables For major assembly connector and switch locations see Figures 7 11 through 7 18 later in this chapter Black Pages gt Any Faint Print Condition Faulty Registration Vertical White Streaks Right hand Image Missing Small Print Voids Random Horizontal Black Lines Repetitive Defects Smeared Print Improper Fusing Distorted Print Black Pages with Horizontal White Strips mage Skew Improperly Sized Image Vertical Dark Streaks Large Print Voids Background Scatter White or Blank Pages Troubleshooting 7 35 Registration Small Print Rando Delnzts Blac
54. te displayed select 3 Lock out the paper trays i 4 any paperi from the MP Tray Tray 1 The printer should display an E message For the LaserJet 5 printers run a Self Test to generate the T LUHO message 5 Insert paper into the MP Tray Tray 1 If the message persists or if the load message never PS4 the sensor flag is defective Troubleshooting 7 17 12 Printer Open Message The i H orc display tells the operator to close the printer s top cover The DC Controller detects the Printer Open condition through the position of SW601 which is located on the Paper Feed Assembly PCA A tab underneath the top cover Door engages SW601 through a slot in the Top Cover Assembly In addition to signaling that the top cover is open SW601 enables the 24B VDC which controls the high voltage for the printing processes and the AC Voltage for the Fuser Assembly Table 7 6 12 PRINTER OPEN Checks Is the Top Cover Assembly open Ensure the Top Cover Assembly is firmly closed and that the protrusion that engages the switch actuator is not broken With the top cover open check that the Use a slim object to manually engage switch actuator does engage the switch SW601 Listen for a definite click as the Switch is engaged see Figures 7 2 and 7 14 Has the Paper Control PCA on the Paper SW601 has an actuator that can be Feed Assembly been replaced
55. temporary macros See Chapter 3 for more details The Printing PCL PS and Config Menus were changed while data temporary fonts or temporary macros were present in printer memory or while the printer was in the middle of a job Press changes remain recorded in the menu but do not become active until the printer is reset or the job boundary is detected Close the TP Cover Assembly If the problem continues refer to the Message section Open printer and clear any paper within the printer Press 22000 or to reprint the page If the problem persists refer to 1 Message section Check for any paper in the Duplexer area If problem persists refer to the Duplex Section Appendix A Ensure that the Toner Cartridge is installed correctly fully seated into the printer Try a new Toner Cartridge If the problem continues refer to the Message section This message is displayed during the execution of a print engine self test When this test is complete the printer returns to the ready state but remains off line The toner cartridge is almost empty Replace the Toner Cartridge Although you can continue to print for a short while make sure that the print quality does not degrade past th ptable level If the problem continues refer to Message section Troubleshooting 7 3 Table 7 1 Printer Messages continued Symptoms and Recommendations This message is d
56. the High Voltage Contacts for damage If the contacts are dirty or damaged clean the contacts after the repair 3 Replace the High Voltage Power Supply 4 Check and reseat the HVPS cable 5 Replace the DC Controller 16 Toner Low Message message results as the level of toner in the cartridge cavity falls past the minimum level The level is sensed by a mechanism similar to an antenna which detects the AC Bias Voltage applied to the developer mixture If the 1 4 message cannot be cleared by shaking or replacing the art idge perform the steps listed for troubleshooting the message Troubleshooting 7 25 Figure 7 5 Toner Cartridge Components Table 7 8 Toner Cartridge Components Callout Assembly Callout Toner Low Voltage Contact Developer Roller High Voltage Contact Developer Roller Photoconductive Drum Charge Roller High Voltage Contact Charge Roller 7 26 Troubleshooting 41 ERROR Message 4 gt misprint indicates that a temporary malfunction has occurred with the print engine NOT a Formatter error Occasional occurrences of this message can be expected However persistent 41 messages indicate a problem requiring attention The 41 is usually accompanied by a blank or partially 1 page Pressing the key re prints the page and continues the print job A 44 gt occurs due to the following conditions Incorrect Universal Tray Switch
57. tional memory to print the file at full resolution Check the printout for loss of data or print quality The job was not printed because the requested personality such as PostScript was not installed Install the language in which the files are sent together with enough memory to support that language The printer was forced to abort the print job because there was not enough installed memory to support the printer language used The job was printed at 300 dpi with page protection set as specified in the message To print the job as requested install additional memory The job was printed at 600 dpi with page protection set as specified in the message To print the job as requested install additional memory The printer did not have enough memory when switched on to support the previous settings for I O buffering and or Resource Saving probably because you removed a memory SIMM added a new personality SIMM or added the optional duplex unit Buffering and or Resource Saving settings were altered when the printer was switched on because the printer did not have enough memory This usually occurs after memory has been removed from the printer You can check settings by printing a self test The Resource Saving memory area for the specified personality is full Press A to continue printing some data will be lost The current job will print but some resources downloaded fonts etc may not be saved If this err
58. work or a configuration problem has been encountered Refer to the HP JetDirect Network Interface Configuration Guide P N J2552 90001 for detailed explanations of these messages 7 56 Troubleshooting Explanation of Self Test Printout 1 Multiple Environment Information General information about your JetDirect MIO 2 JetDirect Card Status CARD READY indicates the interface is correctly configured and capable of communicating I O CARD NOT READY indicates there is a problem with the interface configuration or server 3 Network Statistics list of network statistics is generated by the JetDirect MIO statistic counters are reset to zero when the printer is turned OFF Supported Network Operating Systems 4 Novell Status Information 5 Apple Ether Talk Local Talk Status Information 6 HP UX Solaris and Sun OS TCP IP Status Information 7 Lan Server Lan Manager Windows for Workgroups Windows NT Status Information Troubleshooting 7 57 HP ETHERNET MULTI ENVIRONMENT FIRMWARE REVISION 4 02 00 LAN HW ADDRESS 080007378FB PORT SELECTION 10BASE T NETWORK MODE MULTI PROTOCAL NETWORK STATISTICS UNICAST PACKETS RCVD 670758 TOTAL PACKETS RCVD FRAMING ERRORS RCVD 2 2 PACKETS TRANSMITTED 257107 UNSENDABLE PACKETS XMIT COLLISIONS XMIT LATE COLLISIONS NOVELL STATUS UNABLE TO FIND SERVER MODE QUEUE SERVER MODE NAME NPI647CC8 SERVER NAME NOVELL RETRANS 1 NETWORK FR
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