Attaching the label to the printer
1 A sheet of labels ships in the paper output bin of your printer. You will need to attach two labels to your printer: the first label is entitled Remove and Realign Paper Before Reloading," the second label is entitled, "Do Not Switch the Paper Path while Printing." 2 Carefully remove labels from the backing sheet. Attach labels to the printers paper input bin. As the label indicates, always remove and realign all paper before reloading. By doing so, you can reduce multiple paper feeds, paper jams, or both.
Attaching the label to the printer 13
Loading paper into the printer
1 Before loading paper into the printer, raise the paper supports located behind the paper input bin and the paper output bin. Using paper supports can help prevent unwanted paper curl and paper jams. 1 Raise the supports on the paper input bin and on the paper output bin until they snap into place. Insert up to 100 sheets of paper into the paper input bin.
Note Be careful not to overfill the bin. Center the paper using the paper guides on the paper input bin.
To test your printer, you can print a selftest page. To do so, make sure the Ready (bottom) light is on and all other indicator lights are off. Press and release the control panel button. (If the printer is in SleepMode [all lights are off], you will need to press the control panel button twice.) The Data (middle) light will come on and the Ready (bottom) light will blink. The self-test page prints. Note When adding paper to an existing stack in the paper input bin, always remove and realign all paper to avoid multiple paper feeds, paper jams, or both.

14 Chapter 1 - Setup

Printer software information
Before you can use your printer, you must first install the printers software. Your printers software includes printer drivers that support Microsoft Windows 95, Windows 98, Windows 2000, Windows NT 4.0 and Windows 3.1x.
Recommended system requirements
Pentium processor 32 MB RAM (Windows 95 and Windows 98) 20 MB free hard disk space
Installation considerations
If you have any problems during installation, try the following:
Check the power cord connections and power source. Make sure you are using a high-quality IEEE-1284 compliant parallel cable.
If the installation still could not be successfully completed, see the alternative installation instructions later in this chapter.
Printer software information 15
Installing your printer software
The following section lists several different methods of installation. Use the method most appropriate for your computer system. Make sure that you quit all software that is currently running, such as Microsoft Office Manager, virus checkers, and fax utilities.

Standard installation for Windows 95, Windows 98, Windows 2000, and NT 4.0
To install your printer software for Windows 95, Windows 98, Windows 2000, or NT 4.0, refer to the following steps: 1 Note Insert HP LaserJet 6L Pro CD into CD drive.
If the installation dialog screen does not appear, click Start, then click Run. Type your X:/Setup, replacing "X" with the letter of your CD drive, and click OK. 2 Click the Install button.
HP recommends the Express install for most users. Follow the instructions on your screen to complete the installation. Remove the CD when the installation is complete.
If the next time you restart your computer and your screen displays "New hardware detected" and lists the HP LaserJet 6L Pro printer, select "Do not install a driver (Windows will not prompt you again)" and click OK.

16 Chapter 1 - Setup

Standard installation for Windows 3.x
To install your printer software for 3.x, refer to the following steps: 9 Quit all currently running programs. Insert the HP LaserJet 6L Pro CD into the CD drive. Select the drivers directory. Select the language directory of your choice. Select the "Win3x" directory. Select the Disk-1 directory. Run setup.exe. Follow the instructions on your screen. When the installation program asks you to install the HP LaserJet 6L Pro Disk-2, enter "x\drivers\language\Win3x\disk2". (Replace "x" with the drive letter of your CD ROM, and replace "language" with the name of the language directory you chose in step 4 [for example, the directory "Chi_simp" contains the Simplified Chinese driver and the directory "en" contains the English driver]).
10 Remove the CD when the installation is complete.
Alternative Installation for Windows 95 and Windows 98
9 Quit all currently running programs. Insert HP LaserJet 6L Pro CD and click OK. Click Start, point to Settings/Printers and then click printers. Double-click Add Printer. Click Next until you come to the List of Printer Manufacturers. Click Have Disk. Click Browse. Select the drive that contains the HP LaserJet 6L Pro CD. Select the directory for the language of your choice. The file named "hpbfgb.inf" will appear in the file name box.
Installing your printer software 17
10 Select the directory "Win9x" to access the drivers for Windows 95 and Windows 98. 11 Click OK, and then click OK again. The name of the printer driver will appear. 12 Click Next, and then click Next again. 13 Remove the CD when the installation is complete.
Alternative Installation for Windows NT 4.0

Select the drive that contains the HP LaserJet 6L Pro printer drivers.
10 Select the directory that contains the HP LaserJet 6L Pro drivers. (The files are saved by default in the following location: C:\HPLJ6L.) 11 Select the folder for the appropriate operating system. 12 To finish the installation: For Windows 95 or Windows 98: Complete steps 11 through 13 in the "Alternative Installation for Windows 95 and Windows 98" section. For Windows NT 4.0 or Windows 2000: Complete steps 11 through 13 in the "Alternative Installation for Windows NT 4.0" section.

20 Chapter 1 - Setup

Making diskettes from your CD for installation on Windows 3.x
You will need three blank diskettes. Please label your diskettes diskette-1, diskette-2, and diskette-3 now. 9 Insert the HP LaserJet 6L Pro CD into the CD drive. Explore/Browse to the CD drive. Select the "drivers" directory. Select the language directory of your choice. Select the "Win3x" directory. Select the "Disk-1" directory. Insert diskette-1 into the A: drive. Copy the contents of the directory "Disk-1" onto Diskette-1 in the A: drive. Insert diskette-2 into the A: drive.
10 Copy the contents of the directory "Disk-2" onto diskette-2 in the A: drive. 11 Insert diskette-3 into the A: drive. 12 Copy the contents of the directory "Disk-3" onto diskette-3 in the A: drive.
To run the 3.x installer from a diskette, refer to the following steps: Insert diskette-1 into the A: drive. Run the setup.exe on diskette-1. Follow the instructions on the screen to complete the installation. Remove any diskettes from the A: drive.
Installing your printer software 21

22 Chapter 1 - Setup

Printer control panel

The control panel

The control panel consists of one button and three indicator lights.

Error (amber)

Data (green)

Ready (green)

Each light will be in one of the following states:

On Off Blinking

The control panel 23

Using the control panel

Use the control panel button to determine the status of your printer and to accomplish the following tasks:

Status

Condition
No lights are on or blinking.

Cause(s)

Action(s)
Printer is in SleepMode To print, press and or printer has been release the control panel disconnected. button or send the job to print. If no response, check power cord.

If you are printing only one piece of letterhead, use the single-sheet input slot. Note If youre having printing problems on embossed or pre-printed paper, make sure the paper meets HP paper specifications, see appendix C.
Printing on letterhead and envelopes 31

Envelopes

If you print one envelope followed by regular sheets of paper, place the envelope into the (A) single-sheet input slot and regular sheets of paper into the (B) paper input bin. If you are printing several envelopes in succession, fill the paper input bin (B) with up to 10 envelopes. The number of envelopes depends on envelope construction and the operating environment. If you are printing only one envelope, use the single-sheet input slot. Insert the envelopes print side forward as shown. Set the paper path lever to the lower position to reduce wrinkling and curling.

32 Chapter 3 - Printing

Printing tasks
Your printer capabilities include duplex printing, pausing between pages, and stopping a print job. You can also reset your printer if necessary.
Printing on both sides (duplexing)
When you print on both sides of a sheet, you may notice a difference in the way the printer performs. When printing on the second side of the sheet, you may experience some difficulties, such as getting the sheet to feed into the printer or multiple feeds. In addition, the print quality may be different on the second side of the sheet. To minimize these problems, you will want to use paper meeting HP paper specifications in appendix C. 1 Print the first side of the sheet as you normally would. Some software programs include options that are useful when duplex printing, such as printing just the odd pages or the even pages." Consult your software user manual. Allow the sheet to cool and flatten before printing on the second side to get the best possible print quality. Print the second side by placing the sheet back into the paper input bin or the single-sheet input slot. Make sure the side that has already been printed is facing the back of the printer and the top edge of the paper is down, as illustrated below.

Printing tasks 33

Tips for duplex printing
To avoid paper curl, set the paper path lever to the lower position and use the heavy media output slot for a straight-through paper path. To print one page at a time, select the manual feed option in your software to pause the printer between pages. Make certain that the sheets leading edge is not bent or curled.
Pausing the printer between pages
Occasionally, you may need the printer to pause so that you can load special media, such as letterhead. If you specify manual feed in your software, the printer will pause before printing the first page and between each page you print. This will give you time to load the special media. In your softwares printer menu or bin/tray selection, select the manual feed mode. From your software, print the document. The Data light will blink when the page is ready to print, indicating that the printer is paused and waiting. After inserting the correct medium, the printer will pick the sheet automatically. The printer will take media from the single-sheet input slot first. If it does not find media in the single-sheet input slot, it will take media from the paper input bin.

Resetting the printer

Resetting the printer accomplishes the following:
Clears all data from the printer memory (including unprinted data, downloaded fonts, and macros). Finishes printing the current page. Removes some error conditions. Resets the printer to its factory default settings.

To reset the printer

Press and hold the control panel button until the three indicator lights begin to blink in succession (about 5 seconds), and then let go of the button. After resetting, the Ready light will remain lit if no printer errors are found.

34 Chapter 3 - Printing

Stopping a print job
If the file you send to the printer is only one or two pages long, you can stop the print job by resetting the printer as described above. If you want to stop a large print job, see the steps below: 3 Remove the media from the paper input bin except for any sheet that is currently being fed into the printer. Stop and delete the print job through your software. Reset the printer.

Printing tasks 35

Printing on special media
Your printer is designed to print on a variety of media, including transparencies, envelopes, and custom-made paper. It is recommended that you use media that meets HP specifications. See appendix C for more information. 1 Set the paper path lever to the lower position to use the heavy media output slot for a straight-through paper path. This is important when printing media such as postcards, transparencies, labels, envelopes, and heavy paper (100- to 157g/m2 [28- to 42-lb] bond weight). Adjust the paper guides to the approximate size of media you are using. Insert the media print side forward and top side down into the single-sheet input slot or the paper input bin. Readjust the paper guides to center the media. Set the correct margins, paper size, and orientation in your software. Choose Print in your software.
Additional tips for custom sizes
Do not print on media smaller than 76.2 mm (3 in) wide or 127 mm (5 in) tall. Set margins of at least 6.4 mm (.25 in) in your software. Always insert media lengthwise (vertically) into the printer. If you want to print in landscape mode, make this selection through your software.

36 Chapter 3 - Printing

Additional tips for transparencies
To prevent transparency curl, remove the transparency as it comes out of the printer and set it on a flat surface to cool. WARNING! Use only transparencies specified for HP LaserJet printers.
Additional tips for printing labels
Do not use labels that are separating from the backing sheet or that are wrinkled or damaged in any way. Do not use any sheet of labels that has spaces in it where some of the labels have been removed. Do not feed a sheet of labels through your printer more than once.

Solving common problem 41

Clearing paper jams

Occasionally, paper can become jammed while printing. The following list shows some possible causes:

q q q q

The paper was loaded improperly. The paper input bin was overfilled. The guides were not adjusted to the correct position. More paper was added without unloading the bin and realigning all media first. The paper output bin was too full. The paper path lever was adjusted while printing. The printer door was opened while printing. The paper being used does not meet HPs specifications. The paper being used was smaller than 76.2 by 127 mm (3 by 5 in). The power was interrupted while printing.

q q q q q

To clear feed jams in the Input areas
If most of the jammed sheet of paper is visible from the paper input bin or single-sheet input slot, carefully pull the jammed paper straight up and out using both hands. Realign the paper, and reload it.
Note Be sure to center paper with the paper guides. Also, verify that the paper guides are currently adjusted without bending the media. The printer will automatically resume printing.
42 Chapter 4 - Troubleshooting
To clear a jam from the interior area
2 If the jam is not visible in the input paper tray, open the printer door. Remove the toner cartridge. Be sure to protect it from bright light while it is outside your printer.
CAUTION Avoid touching the long, black, sponge roller inside your printer. Touching it may reduce output quality. Push the green paper release lever toward the back. If the paper jam is in the toner cartridge area but has not reached the fuser and roller area, reach inside and carefully pull the sheet straight forward and out. Do not pull the sheet straight up. This can damage your printer.
CAUTION Only use your hands to remove jammed paper. Using other objects can damage internal parts. If the paper jam is between the rollers, grasp the sheet with both hands and slowly pull it straight up and out.

Clearing paper jams 43

After removing all sheets and fragments of paper, replace the toner cartridge and close the printer door.
Your printer will automatically resume printing.
44 Chapter 4 - Troubleshooting

Paper will not feed

1 If your paper does not feed into the printer, briefly press and release the control panel button. The printer will again attempt to feed the media. If this is unsuccessful, try the following procedure: 1 Remove the paper from the input bin, realign the paper, and reload it into the printer.

The software for your printer is Check your softwares printer not configured for the correct selection menu to make sure it printer port. is accessing the correct printer port. If your computer has more than one parallel port, make sure the parallel cable is connected to the correct port. The power cord is not Check the power cord connected to the printer or the connection and the power power source is not active. source. Try a different outlet. See the important warning on powerstrip, page 12. The printer is connected to a switchbox that is not setup correctly. Check the switchbox setting. Try connecting the printer directly to the computer. The switchbox may be defective.
Solving printer problems 47

Symptom

The printer is not responding after print is selected in the software (continued).
The printer is malfunctioning.
If all the lights are on, the printer may be signaling a hardware error. See All the printers lights are on on the following page. Add paper or other print media. Close the door securely. Open the door, reinstall the toner cartridge, then close the door securely.
The Error (top) light stays on.
The printer is out of paper. The printer door is open. The toner cartridge is not installed properly.
Paper is jammed in the printer. See Clearing paper jams earlier in this chapter or make sure toner cartridge is installed. The Error (top) light is blinking. The page is too complex for the printers memory capacity, or the printer may not be able to create the image fast enough to keep pace with the printing process. Briefly press and release the control panel button to resume printing. Some data loss may occur.
Change your page to make it less complex by reducing resolution to 300 dpi. Both the Data (middle) light and the Ready (bottom) light are on steadily (not blinking). The Data (middle) light is blinking. All the printers lights are off and the printer does not respond after attempts to wake it up. Unprinted data is in the printer. Briefly press and release the (Your software did not send an control panel button to print end of job or form feed the remaining data. command.) The printer is in manual feed mode. Make sure the correct paper is loaded into the printer.
The printer is unplugged from Check the power cord the power source. connections and power source. Try a different outlet. See the important warning on power strip, page 12. The printer has malfunctioned. Refer to the support pages on the inside, front cover for support options.

48 Chapter 4 - Troubleshooting
All the printers lights are on.
The printer has a hardware error.
Disconnect the printer from the power source for 10 seconds, then reconnect it. If the lights remain on, disconnect the printer from its power source again, this time reconnecting after a 15-minute wait. If all three lights come back on again, contact your HP authorized service representative.
The printer is feeding multiple Paper guides are not adjusted Remove the paper from the sheets or jams frequently. properly. paper input bin or the singlesheet input slot. Tap the sides of the paper stack together, then reinsert the stack, reinsert the single sheet into the slot. Slide the paper guides against the sides of the stack in the paper input bin or against the single sheet in the single-sheet input slot to center the paper. Make sure the guides are not adjusted too tightly. The paper input bin is too full. Remove some of the sheets. The paper input bin can hold up to 100 sheets of 75g/m2 (20-lb) bond weight paper (less for heavier paper) or up to 10 envelopes (no more than 7 envelopes for areas with climates having high humidity). More than one sheet was added into the single-sheet input slot. Add only one sheet at a time into the single-sheet input slot. If printing more than one sheet of the same type of media, use the paper input bin. Break the ream of paper by curving it into an upside-down u-shape; this may effectively decrease multi-feeds. You can also try turning the paper around to feed the opposite end first.
The paper was poorly cut by the manufacturer and is sticking together.
Solving printer problems 49
Try using different paper. See appendix C.
The printer is feeding multiple The paper does not meet sheets or jams frequently HPs specifications for print (continued). media.
The output capacity was Do not allow more than 100 exceeded in the paper output sheets of 75g/m2 (20-lb) bond bin or heavy media output slot. weight paper (less for heavier paper) to fill the paper output bin. Do not allow more than one transparency or 20 sheets of other media to stack up in front of the heavy media output slot.
50 Chapter 4 - Troubleshooting
Solving print quality problems
Use the following table to help pinpoint and solve print quality problems. Problem Cause(s) Solution(s)
See chapter 3, Managing toner cartridges." Try using different paper. See appendix C.
Print is faded or you notice a The toner cartridge may be block of vertically aligned white getting low on toner. streaks. The paper you are using may not meet HPs paper specifications (for example, it may be too moist or too rough). EconoMode may be on.

52 Chapter 4 - Troubleshooting
Vertical white stripes appear on The printers internal optics are Contact an authorized the page. contaminated. HP service representative to replace the printers internal mirror. See the support pages at the front of this manual for support options. Transfer roller is contaminated. Clean printer or call a service technician. Character voids appear (white If you are using transparencies, areas within the parts of they may not meet characters that should be solid HPs specifications. black). You may be printing on the wrong surface of the paper. Try using different transparencies.
Remove the paper and turn it over. (The wrapper on many reams of paper has an arrow indicating the print side.) Try using different paper. See appendix C. Change printer environment. See appendix B.
The paper may not meet HPs specifications. Ambient conditions. Stains or smudges appear as small, round, black dots on the front or back of a page. Sometimes inconsistent stains appear.
Internal rollers within the printer Clean the printer. are dirty. Defective toner cartridge (damage OPC). Replace cartridge.
Solving print quality problems 53
Change the paper type, weight, or surface finish. See appendix C. If background scatter occurs on an envelope, try moving the text to an area with no seams. Printing on seams can cause this problem. If this problem occurs on the back of a printed page, it may be caused by spilled toner inside the printer. See Cleaning your printer in this chapter.
Background scatter appears on Background scatter results a printed page. from bits of toner distributed on the front or back of a printed page. Background scatter often is isolated to a specific area of the page.
Ambient conditions. The page is completely black.
Change printer environment. See appendix B.
The toner cartridge may not be Remove and reinstall the installed properly. cartridge. See Installing the toner cartridge in chapter 1. The toner cartridge may be defective and need replacing. The toner cartridge may still be under warranty. See HP LaserJet toner cartridge warranty in appendix A. See the support pages at the front of this manual for support options.
The printer may need to be repaired if the problem continues after replacing the toner cartridge.
54 Chapter 4 - Troubleshooting
Characters are only partially printed (also referred to as dropouts).
A single sheet of paper may be Try reprinting the job. defective. The print density may need adjusting. Adjust the print density through your software.
The moisture content of the paper may be inconsistent or the paper may have moist or wet spots on the surface. Ambient conditions.

58 Chapter 4 - Troubleshooting
Troubleshooting printing problems from MS-DOS
The following instructions will help you troubleshoot Windows printing problems using MS-DOS. Note Before troubleshooting from MS-DOS, make sure your printer can print a self-test page. (See Printing a self-test page earlier in this chapter.) To establish basic communication to the printer, follow the steps below: 1 Exit Windows 3.1x. If in Windows 95 and Windows 98, click Start, click Shut Down, and click Restart the computer in MS-DOS mode, respectively. At the command prompt (for example, C:\), type: Dir>PRN and press enter. This will send a directory of your hard drive to the printer. See the chart below for recommended solutions.

Printer Status

Both the Data light and the Ready light are on steadily (not blinking).

Response

Command prompt (C:\) returned.
Press the control panel button. You will receive a printout of your hard drives directory. Communication verified; return to Windows. No action is needed. Communication has been verified; return to Windows.
Data light comes on; Ready light flashes.
Troubleshooting printing problems from MS-DOS 59
Printer is not responding.
Flashing cursor; command prompt (c:\) not returned; keyboard locked up.
Verify that the Ready light is on. Hold down CTRL, then press and release Break to free the keyboard. Verify that the Ready light is on. Specify the port name when sending directory (for example, LPT1). Hold down CTRL, then press and release Break to free the keyboard. Disconnect the power cable from the back of the printer. Disconnect the printer cable from the computer and printer. Reconnect the printer cable directly between the computer and the printer. Try using a different parallel cable (IEEE-1284), parallel port, or both. Disconnect, then reconnect the parallel cable at both ends. Ensure a direct connection to the printer. Try using a different parallel cable (IEEE-1284), parallel port, or both. Disconnect, then reconnect the parallel cable at both ends. Ensure a direct connection to the printer. Try using a different parallel cable (IEEE-1284), parallel port, or both.

DOS Message: Write fault error writing device PRN.
Data light comes on; Ready light flashes. Printed text is not legible, or random characters are occurring on the page.
Data light comes on; Ready light flashes. Only one line of text prints or all text is on one line.
60 Chapter 4 - Troubleshooting
Text files will print. Graphic files do not print or print garbage.
No error messages. All appears okay.
Disconnect, then reconnect the parallel cable at both ends. Ensure a direct connection to the printer. If copying a graphic file, type the following command at the command prompt: copy filename LPT1 where filename is the name of the graphic file. Be sure to leave a space before and after the filename. Try using a different parallel cable (IEEE-1284), parallel port, or both.
Troubleshooting printing problems from MS-DOS 61

Networks and switchboxes

The printers status read-back feature requires a direct connection between the printer and the computer. Most devices connected between the printer and the host computer prevent the printer from sending data back to the computer. If you use a mechanical switchbox, follow these guidelines:
Do not switch while the printer is printing or receiving data (when the Ready light is blinking). Do not switch to a host computer that is OFF and then turn that computer ON. The Ready light on the printer will blink as if the computer is sending data. If the Error light is blinking, reset the printer. To do so, press and hold the control panel button for five seconds, and then send the job again. Use a surge protector.

Out of memory

If the Error light is blinking, the page may be too complex for the printers memory capacity. To clear this error, briefly press and release the control panel button. Printing will resume; however, some data loss may occur. To avoid this error in the future:
Reset the printer. To do so, press and hold the control panel button for five seconds. Set resolution to 300 dpi with your software. See Help for more suggestions regarding printer memory usage.
62 Chapter 4 - Troubleshooting
Warranty and support information
HP limited 1-Year warranty statement
Warranty on this product is available in China, India, and Indonesia
1 HP warrants to you the end-user customer, that HP hardware, accessories and supplies, will be free from defects in materials and workmanship after the date of purchase, for the period specified above. If HP receives notice of such defects during the warranty period, HP will, at its option, either repair or replace products which prove to be defective. HP warrants to you that HP software will not fail to execute its programming instructions after the date of purchase, for the period specified above, due to defects in material and workmanship when properly installed and used. If HP receives notice of such defects during the warranty period, HP will replace software media which does not execute its programming instructions due to such defects. HP does not warrant that the operation of HP products will be uninterrupted or error free. HP products may contain remanufactured parts equivalent to new in performance or may have been subject to incidental use. If HP is unable, within a reasonable time, to repair or replace any product to a condition as warranted, you will be entitled to a refund of the purchase price upon prompt return of the product. Warranty does not apply to defects resulting from (a) improper or inadequate maintenance or calibration, (b) software, interfacing, parts or supplies not supplied by HP, (c) unauthorized modification or misuse, (d) operation outside of the published environmental specifications for the product, or (e) improper site preparation or maintenance. ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE IS LIMITED TO THE DURATION OF THE EXPRESS WARRANTY SET FORTH ABOVE. Some states or provinces do not allow limitations on the duration of an implied warranty, so the above limitation or exclusion might not apply to you. This warranty gives you specific legal rights and you might also have other rights that vary from state to state, province to province, or country to country. THE REMEDIES IN THIS WARRANTY STATEMENT ARE YOUR SOLE AND EXCLUSIVE REMEDIES. EXCEPT AS INDICATED ABOVE, IN NO EVENT WILL HP BE LIABLE FOR LOSS OF DATA OR FOR DIRECT, SPECIAL, INCIDENTAL, CONSEQUENTIAL (INCLUDING LOST PROFIT), OR OTHER DAMAGE,

Environmental product stewardship 71

Laser safety statement

The Center for Devices and Radiological Health (CDRH) of the U.S. Food and Drug Administration has implemented regulations for laser products manufactured since August 1, 1976. Compliance is mandatory for products marketed in the United States. This printer is certified as a Class 1 laser product under the U.S. Department of Health and Human Services (DHHS) Radiation Performance Standard according to the Radiation Control for Health and Safety Act of 1968. Since radiation emitted inside this printer is completely confined within protective housings and external covers, the laser beam cannot escape during any phase of normal user operation. WARNING! Use of controls, adjustments, or performance of procedures other than those specified in this manual may result in hazardous radiation exposure.
72 Appendix B - Printer specifications
Declaration of conformity
according to ISO/IEC Guide
Manufacturers Name: Manufacturers Address: declares that the product Product Name: Model Number: Product Options: Safety: HP LaserJet 6L Pro Printer C8060A All IEC 950: 1991+A1+A2+A3/A4/EN 60950: 1992+A1/A2+A3/ A4+A11 GB4943-1995 IEC 825-1:1993 +A1/EN 60825-1:1994 +A11 CLASS 1 (LASER/LED) PRODUCT CISPR 22-1997/EN 55022:1998 Class B EN 61000-3-2:1995 EN 61000-3-3:1995 EN 55024:1198 FCC Title 47 CFR, Part 15 Class B2 / ECES-002, Issue 2/ GB9254-88 AS/NZS 3548:1995 Hewlett-Packard Company 11311 Chinden Boulevard Boise, Idaho 83714-1021, U.S.A.
conforms to the following Product Specifications:
Supplementary Information:
The product herewith complies with requirements of the EMC Directive 89/336/EEC and the Low Voltage Directive 73/23/EEC, and carries the CE-Marketing accordingly. 1) The product was tested in a typical configuration with Hewlett-Packard Personal Computer Systems. 2) This Device complies with Part 15 of the FCC rules. Operation is subject to the following conditions: (a) this device may not cause harmful interference, and (b) this device must accept any interference received, including interference that may cause undesired operation. Boise, Idaho, February 25, 2000
For Regulatory Topics ONLY, contact:
Contact: Product Regulations Manager, Hewlett-Packard Company, P.O. Box 15, MS 160, Boise, ID 83707-0015 (Phone: 208-3966000)

Index 83

warranty 64 printer door indentifying 8 opening 9 printer drivers installing 16 support 15 processor requirements 15

quality, print 46, 51

RAM (Random Access Memory) insufficient 62 printer 70 system requirements 15 Random Access Memory (RAM) insufficient 62 printer 70 system requirements 15 Ready light 23, 24 recycling 9, 71 redistributing toner 39 repair services 64 requirements, system 15 resetting printer 34 resolution maximum 70 reducing 38 responding, printer not 47 returning parts 71 rollers 43, 53
requirements for 15 standard 16, 18 Windows Windows 3.Windows 95/Windows 95/98 alternative 17 Windows NT 16 Windows NT alternative 18 software license agreement 65 special media 36 specifications paper 76 printer 69 speed, printer EconoMode 38, 58 maximum 69 stains, correcting 51, 53 standard installation 16, 18 stopping print jobs 35 storing envelopes 79 paper 55 printer 69 toner cartridges 9 straight-through path 29, 36 streaks, correcting 51 supplies ordering 67 returning 71 supports, paper indentifying 8 using 14 surge protectors 62 switchboxes 62 system requirements 15
sales and service offices 67 sealing tape, removing 9 self-test page, printing 41 separating paper 56 serial port 11 setting up 7 shadows, correcting 52 single-sheet input slot clearing paper jams 42 indentifying 8 using 30 sizes, print media envelopes 27 paper 27, 69 SleepMode automatic 12 power consumption 69 waking from 24, 48 smudging, correcting 51 software installation
tape, removing 9 temperature, for storing printer 69 test page, printing 41 text prints poorly 53, 55 toner cleaning 46 excessive 46 redistributing 39 washing off clothing 10 toner cartridges installing 9 leaking 46 ordering 67 part numbers 67 print life 38 print quality 51, 52, 54 recycling 71 storing 9 warranty 64
transparencies, printing 36, 37 troubleshooting cables 47 DOS 59 memory, insufficient 62 networks 62 paper jams 42, 49 paper problems 55, 76, 77 power 47 print quality 51 slow speed 58 software 58 switchboxes 62 Windows printing 59 two-sided printing 33, 34

LaserJet 5L/6L/6L Gold/6L Pro

Printer

Service Manual

English

Copyright 2000 Hewlett-Packard Co. Printed in USA
Manual Part No. C8060-90903
Printed on at least 50% Total Recycled Fiber with at least 10% Post-Consumer Paper
*C8060-90903* *C8060-90903*

C8060-90903

8.268 (A4 Width) X 11 (Letter Height) Back Cover
8.268 (A4 Width) X 11 (Letter Height) Front Cover
Service.book Page 1 Thursday, September 14, 2000 11:15 AM
HP LaserJet 5L/6L/6L Gold/6L Pro Printer
Service Manual _____________
Service.book Page 2 Thursday, September 14, 2000 11:15 AM
Copyright Hewlett-Packard Company, 2002 All Rights Reserved. Reproduction, adaptation, or translation without prior written permission is prohibited, except as allowed under the copyright laws. Part number: C8060-90903 Second Edition, February 2002

Warranty

The information contained in this document is subject to change without notice. Hewlett-Packard makes no warranty of any kind with respect to this information. HEWLETT-PACKARD SPECIFICALLY DISCLAIMS THE IMPLIED WARRANTY OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. Hewlett-Packard shall not be liable for any direct, indirect, incidental, consequential, or other damage alleged in connection with the furnishing or use of this information.

Trademark Credits

ENERGY STAR is a U.S. registered service mark of the United States Environmental Protection Agency.
Hewlett-Packard Company 11311 Chinden Boulevard Boise, Idaho 83714 U.S.A.
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Conventions

This is a combined Service Manual for the HP LaserJet 5L, 6L, 6L Gold, and 6L Pro printers. The HP LaserJet 6L Gold shares the same characteristics as the HP LaserJet 6L. For the purposes of this manual, the HP LaserJet 6L refers to both the 6L and the 6L Gold.
This manual uses the following conventions: COLOR is used to emphasize items that are important to the material under discussion. Bold is used for emphasis, particularly in situations where italic type would be confusing. Italic type is used to indicate related documents or emphasis. Hint Note CAUTION WARNING! Hints are used to suggest an action that might simplify the process. Notes contain important information set off from the text. Caution messages alert you to the possibility of damage to equipment or loss of data. Warning messages alert you to the possibility of personal injury.
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Contents

1 Product information
Chapter contents. Printer features. Identification. HP LaserJet 6L Gold. Model and serial. Specifications. Product overview. Service approach. Parts Exchange Program. Ordering parts. Ordering related documentation. Contacting HP to place an order. Technical assistance. HP Customer Care. HP worldwide sales and service offices. Warranty. Hardware service during the warranty period. Hardware service after the warranty period. HP LaserJet Toner Cartridge warranty. Voltage conversions. 29 29

3.5 @ 120v 1.8 @ 230v

Watts (typical)
Printing = 100 (5L) SleepMode = 6 (5L) Printing = 100 (5L) SleepMode = 6 (5L) 150 (6L) 4 (6L) 150 (6L) 4 (6L) 150 (6L Pro) 4 (6L Pro) 150 (6L Pro) 4 (6L Pro)
120 Vac 10% 100 Vac 10% 220 Vac 10%Vac 10%
Minimum recommended circuit capacity for product. HP LaserJet 6L Pro operates at 220/240 Volts only.

Table 1-5

Acoustic emissions
5.6 Bels Sound Power Level (per ISO 9296) Silent
During Printing During Standby & SleepMode

18 Product information

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Product overview

Figure 1-4
Front/side views of the printer 9 Paper Input Support (not present on the HP LaserJet 6L Pro) Paper Output Support (not present on the HP LaserJet 6L Pro) Paper Guides Error (top) Indicator Light Data (middle) Indicator Light Ready (bottom) Indicator Light Control Panel Button Paper Output Bin Paper Path Lever
10 Serial and Model Number (under printer) 11 Paper Input Tray 12 Single Sheet Input Slot 13 Front Output Slot (face-up)

Product overview 19

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Figure 1-5

Front door assemblies 14 Paper Release Lever 15 Toner Cartridge Compartment 16 Transfer Roller (do not touch) 17 EP Door

20 Product information

Service.book Page 21 Thursday, September 14, 2000 11:15 AM

Figure 1-6

Back view of the printer 18 Power Cable Connector 19 Parallel Cable Connector 20 Memory Expansion Cover (not present on the HP LaserJet 6L Pro)

Product overview 21

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Service approach

Repair of the printer normally begins with the use of the printers internal diagnostics in conjunction with the troubleshooting procedures in Chapter 7. Once a faulty part is located, repair is generally accomplished by assembly level replacement of Field Replaceable Units (FRUs). Some mechanical assemblies may be repaired at the subassembly level. PCA component replacement is not supported by Hewlett-Packard. Part numbers for all FRUs are located in Chapter 8 of this manual.

Parts Exchange Program

HP offers remanufactured assemblies for some selected parts. These are identified in Chapter 8 and can be ordered through HPs Commercial Service and Support Organization-Americas (CSSO-A), or Commercial Service and Support Organization-Europe (CSSO-E).

Ordering parts

Field replaceable part numbers are listed in Chapter 8 of this manual. Replacement parts may be ordered from HP's Commercial Service and Support Organization-Americas (CSSO-A), or Commercial Service and Support Organization-Europe (CSSO-E).
Ordering related documentation
Table 1-6 on the following page lists part numbers and where to order related documentation.

Contacting HP to place an order
To order parts or related documentation, contact one of the following HP support organizations:
CSSO-A (Commercial Service and Support Organization-Americas) (800) 227-8164 (U.S. Only) CSSO-E (Commercial Service and Support Organization-Europe) (49 7031) 142253

Table 1-6

Description

Related documentation

Part Number 5021-0369 C3941-90901 C3990-90901 C8060-90901 5010-3994 5963-7863 5961-0880 C8060-60102 (English) C8060-60103 (Simplified Chinese) X X X X X X X X CSSO-A X X X CSSO-E X
HP LaserJet Family Quick Reference Service Guide HP LaserJet 5L Printer Users Manual HP LaserJet 6L Printer Users Manual HP LaserJet 6L Pro Printer Users Guide HP PCL5 Printer Language Technical Reference Information Package HP LaserJet Printer Family Paper Specifications Guide LaserJet Basic Hardware Training Course HP LaserJet 5L/6L/6L Gold/6L Pro Service and Support Documentation and Training CD-ROM

22 Product information

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Technical assistance

HP Customer Care
Along with your product, you receive a variety of support services from Hewlett-Packard and our support partners designed to give you the results you need, quickly and professionally.
Online Services: for 24hour access to information over your Internet connection, we suggest these services. Obtaining Software World Wide Web URL: For information specific to the HP LaserJet 5L/ 6L6L Gold/6L Pro products: http://www.hp.com/go/support/ (site is in English) Visit: http://www.hp.com/go/support/ (site is in English) Call: Australia: China: Argentina: Mexico: Spain: Portugal: German: French (Europe): Italian: English: Canada and US: Taiwan: Korea: Greece, Ireland, and the UK: Hong Kong SAR, Malaysia, and Singapore: India: New Zealand: ++(541) 800-427-6684 +44 (0) 012 +44 (0) 466 +44 (0) 353 +44 (0) 343 +44 (0) 466 +44 (0) 511 (661) +888 (2) +82 (2) +44 (0) 511 +4477 (91) (11) +356 6640
Call (1) (800) 538-8787 (U.S.) or (1) (800) 387-3154 (Canada). HP Direct Ordering for Accessories and Supplies (U.S. and Canada): HP Support Assistant compact disc (U.S., Canada, Singapore, Hong Kong SAR, Malaysia): HP Service Information (U.S. and Canada): This support tool offers a comprehensive online information system designed to provide technical and product information on HP products. To subscribe to this quarterly service in the U.S. or Canada, call (1) (800) 457-1762. In Hong Kong SAR, Malaysia, or Singapore, call Fulfill Plus at (65) 740-4477. To locate HP-authorized dealers, call (1) (800) 243-9816 in the U.S. or (1) (800) 387-3154 in Canada.

Technical assistance 23

Russia and the Ukraine:

China: Hong Kong SAR: Hungary:

+86 (0)+365 (0)1 3821111

24 Product information
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HP worldwide sales and service offices

Argentina

Hewlett-Packard Argentina Montaeses Buenos Aires Phone: (54) (1) 787-7115 Fax: (54) (1) 787-7287

Australia

Hewlett-Packard Head office Hewlett-Packard Australia Ltd. 31-41 Joseph Street Blackburn, VIC 3130 Phone: (61) (3) 9272-2895 Fax: (61) (3) 898-7831 Service and Support Hewlett-Packard 351 Burwood Hwy Forest Hill VIC 3131 Phone: (61) (3) 8877-5786

Austria

Hewlett-Packard GmbH Lieblgasse 1 A-1222 Vienna Phone: (43) (1) 25000-555 Fax: (43) (1) 25000-500

Belgium

Hewlett-Packard Belgium S.A. NV Boulevard de la Woluwe-Woluwedal 100-102 B-1200 Brussels Phone: (32) (2) 778-31-11 Fax: (32) (2) 763-06-13
China Hewlett-Packard Co. Ltd. 9/F, HP Building No. 2 Dong San Huan Nan Lu Chao Yang District Beijing 100022, P.R. China Phone: (86 10) Customer Information Center: Phone: (86 10) 6564-3888 or (86 10) 6564-5959

Denmark

Hewlett-Packard A/S Kongevejen 25 DK-3460 Birkerd Denmark Phone: (45) Fax: (45) 4281-5810

Finland

Hewlett-Packard Oy Piispankalliontie 17 FIN-02200 Espoo Phone: (358) (9) 887-21 Fax: (358) (9) 887-2477

France

Hewlett-Packard France 42 Quai du Point du Jour F-92659 Boulogne Cedex Phone: (33) (146) 10-1700 Fax: (33) (146) 10-1705

Germany

Hewlett-Packard GmbH Herrenberger Strasse Bblingen Phone: (49) (0) 180 532-6222 (49) (0) 180 525-8143 Fax: (49) (0) 180 531-6122

Greece

Hewlett-Packard Hellas 62 Kiffisias Av. Polis Center Maroussi Athens Greece Phone: (30) (1) 619-6411 Fax: (30) (1) 619-6512

Hong Kong SAR

Hewlett-Packard Asia Pacific Ltd 25/F City Plaza One 1111 Kings Road, Taikoo Shing, Hong Kong SAR Phone; (8 52) 2599-7777 Fax: (8 52) 2506-9776 Hardware Repair Center: Phone: (8 52) 2599-7000 Extended Warranty Support: Phone: (8 52) 2599-7000 Customer Information Center: Phone: 8 52) 2599-7066

Hungary

Hewlett-Packard Magyarorszg Kft. Neumann Jnos u. 1 H-1111 Budapest Phone: (36) (1) 382-6666 Fax: (36) (1) 382-6777 Hardware Repair Center: Phone: (36) (1) 343-0312 Customer Information Center: Phone: (36) (1) 343-0310

26 Product information

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Russian Federation

Hewlett-Packard Company Representative Office Kosmodamianskaya naberezhnaya 52, Building Moscow Phone: (7) (0) 95 797-3500 Fax: (7) (0) 95 797-3501

Singapore

Hewlett-Packard Singapore (Service) Pte Ltd 438A Alexandra Road Blk A Alexandra Technopark #02-08 Singapore 119967 Phone: (65) 275-3888 Fax: (65) 273-1146 Extended Warranty Support: Phone: (65) 374-6441 Customer Information Center: Phone: (65) 272-5300
Hewlett-Packard Espaola, S.A. Carretera de la Corua km 16.500 E-28230 Las Rozas, Madrid Phone: (34) 91-6311600 Fax: (34) 91-6311830

Sweden

Hewlett-Packard Sverige AB Skalholtsgatan 9 S-Kista Phone: (46) (8) 444-2000 Fax: (46) (8) 444-2666

Switzerland

Hewlett-Packard (Schweiz) AG In der Luberzen 29 CH-8902 Urdorf/Zrich Phone: (41) (0848) 66 Fax: (41) (1) 00 Extended Warranty Support: Phone: (41) (0848) 11

Ukraine

Hewlett-Packard Trading S.A. 14, Bekhterevskiy Pereulok, Block E 04053 Kiev Phone: (380) Fax: (380) 61 21

United Kingdom

Hewlett-Packard Ltd. Cain Road Bracknell Berkshire RG12 1HN Phone: (44) (0) (44) (0) 5202 Fax: (44) (134) 436-3344

Technical assistance 27

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1 HP warrants to you the end-user customer, that HP hardware, accessories and supplies, will be free from defects in materials and workmanship after the date of purchase, for the period specified above. If HP receives notice of such defects during the warranty period, HP will, at its option, either repair or replace products which prove to be defective. HP warrants to you that HP software will not fail to execute its programming instructions after the date of purchase, for the period specified above, due to defects in material and workmanship when properly installed and used. If HP receives notice of such defects during the warranty period, HP will replace software media which does not execute its programming instructions due to such defects. HP does not warrant that the operation of HP products will be uninterrupted or error free. HP products may contain remanufactured parts equivalent to new in performance or may have been subject to incidental use. If HP is unable, within a reasonable time, to repair or replace any product to a condition as warranted, you will be entitled to a refund of the purchase price upon prompt return of the product. Warranty does not apply to defects resulting from (a) improper or inadequate maintenance or calibration, (b) software, interfacing, parts or supplies not supplied by HP, (c) unauthorized modification or misuse, (d) operation outside of the published environmental specifications for the product, or (e) improper site preparation or maintenance. ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE IS LIMITED TO THE DURATION OF THE EXPRESS WARRANTY SET FORTH ABOVE. Some states or provinces do not allow limitations on the duration of an implied warranty, so the above limitation or exclusion might not apply to you. This warranty gives you specific legal rights and you might also have other rights that vary from state to state, province to province, or country to country. THE REMEDIES IN THIS WARRANTY STATEMENT ARE YOUR SOLE AND EXCLUSIVE REMEDIES. EXCEPT AS INDICATED ABOVE, IN NO EVENT WILL HP BE LIABLE FOR LOSS OF DATA OR FOR DIRECT, SPECIAL, INCIDENTAL, CONSEQUENTIAL (INCLUDING LOST PROFIT), OR OTHER DAMAGE, WHETHER BASED IN CONTRACT, TORT, OR OTHERWISE. Some states or provinces do not allow the exclusion or limitation of incidental or consequential damages, so the above limitation or exclusion may not apply to you.

38 Operating overview

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Table 3-1

Indicator Lights (Continued) (2 of 2) It means this:
Printer is in Manual Feed mode.

Data Light is blinking

Do this:
Make sure that the correct paper is loaded. Then, press and release the Control Panel Button to print.

Error Light remains on

Printer is out of paper. Printers EP door is open. Printer has a paper jam. Toner Cartridge is either missing or not installed correctly.
Add paper. Close the door. Clear the jam and resume printing. Install a cartridge, being careful to position it correctly. NOTE: The HP LaserJet 6L Pro has no mechanism for detecting the presence of a Toner Cartridge. If the Toner Cartridge is missing, the Error Light will remain off. Printing without a Toner Cartridge installed may cause a paper jam. If the Error Light remains lit after checking for these problems, and theres no paper jam, disconnect the power for 10 seconds, then reconnect to the power source. If, after taking these actions, the light remains on, refer to Chapter 7, Troubleshooting.

Error Light is blinking

The page may have too much data or may be too complex for the printers memory capacity.
Press and release the Control Panel Button to continue printing. There may be some data loss on the page. Hint: To avoid this in the future: 1. See your printer driver help for more suggestions regarding printer memory usage. 2. Reduce resolution to 300 dpi with your software. 3. Install additional printer memory. (See Chapter 6 for information on installing additional memory.)
All lights remain Printer is indicating either on an internal problem or a fatal error.
1. If you have added an additional memory card, try removing it. 2. Disconnect the power for 10 seconds, then reconnect it. 3. If all of the lights come on steadily again, try disconnecting the power for 15 minutes. If this error remains after completing the tasks above, see Chapter 7, Troubleshooting.

All lights are blinking

Printer is initializing or resetting (6L Pro) Memory card may be slower than 70 nsec (5L/6L)
No action is necessary. See Chapter 7, Troubleshooting.
Using the Control Panel 39

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Continuous self test

Note The HP LaserJet 6L Pro does not support the continuous self test. A continuous self test can be useful for troubleshooting paper path and other problems. To print a continuous self test: 3 Disconnect the printer from the power source. Press and hold down the Control Panel Button while connecting power. Continue holding the button for about five seconds. All lights will illuminate at once, then each will light in sequence. Release the button. The printer conducts its internal diagnostics routine, then prints the self-test page continuously until stopped. To stop the continuous self test (and reset the printer), press and hold the Control Panel Button for a few seconds until all lights begin lighting in sequence once again.
The self test does not print at the printers rated speed of 4 ppm (HP LaserJet 5L) or 6 ppm (HP LaserJet 6L). The engine test prints at the printers rated speed.

Printing an engine test

The engine test print can be used to verify that the print engine is functioning correctly. The Formatter PCA is completely bypassed during an engine test. Consequently, this test is useful for isolating engine printer problems. For the HP LaserJet 5L and 6L printers, the engine test prints a full page of vertical lines down the entire printable area. For the HP LaserJet 6L Pro, the engine test prints a full page of horizontal lines across the entire printable area. These engine test pages are useful for checking and adjusting registration. Note Perform the engine test with the printer covers in place, as shown in Figure 3-6. Refer to Engine Test in Chapter 7 for the engine test procedure.
Engine test printout (5L/6L)
Engine test printout (6L Pro)

Engine test button

Figure 3-4

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Resetting the printer

Resetting the printer accomplishes the following:

l l l l

Clears all data from the printers memory (including unprinted data, downloaded fonts, and macros). Stops any printing that is taking place and ejects the page. Removes some error conditions. Resets the printer to its factory default settings.

To reset the printer

Press and hold the Control Panel Button until the three Control Panel Lights blink quickly in succession (about five seconds), then let go of the button. After resetting, the Ready Light will remain lit if there are no printer errors. (Make sure there is paper in the printer or the Error Light will remain lit.)

Toner Cartridge

Delivery Paper Sensor

Charging Roller

Developing Roller Bias

Memory

HV Power Supply

Transfer Roller I/O

Main Motor Drive

Power Supply

AC Driver LV Power Supply Fuser Drive

Fusing Assembly

Control Panel

Sensors/Solenoid

Figure 5-2

DC Controller loads

DC Controller/power system 55
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Print engine control system

Laser and scanner drive

Based on information received from the Formatter, the DC Controller sends signals to the Laser/ Scanner Assembly to modulate the laser diode ON and OFF and to drive the Laser/Scanner motor. Refer to Image formation system later in this chapter for more information.
Paper motion monitoring and control
The DC Controller PCA controls paper motion by continuously monitoring the various paper sensors and coordinating the timing with the other print processes. For a detailed explanation of paper movement, and the interaction of photosensors and solenoid with the paper movement process, refer to Paper feed system later in this chapter.

12 V shutoff switch

The 12 volt DC power shutoff switch, Switch 101, located on the top of the printer, is activated by the printer door. The front door must be closed before the printer can resume printing.

Engine test switch

The Test Print, Switch 201, located on the DC Controller, is activated manually through an access hole at the front of the printer. This switch causes the print engine to perform a self-test diagnostic which bypasses the Formatter PCA and prints a full page of black vertical lines. This test is useful for troubleshooting printer problems because it isolates the print engine from the Formatter PCA. (See Chapter 7, Troubleshooting, to learn more about how to perform an engine test.)
The Motor is controlled by the DC Controller PCA. The Motor provides all of the printers paper movement.
Power system (on DC Controller PCA)
The AC, DC, and high voltage power supply circuits are all contained within the DC Controller PCA.

Step 2: Drum conditioning
After the drum is physically cleaned, it must be conditioned. This process consists of applying a uniform negative charge on the surface of the drum with the primary charging roller, located in the toner cartridge. The primary charging roller is coated with conductive rubber. An AC bias is applied to the roller to erase any residual charges from any previous image. In addition, a negative DC bias is applied by the charging roller to create a uniform negative potential on the drum surface. The amount of DC voltage is modified by the print density setting.

Step 3: Image writing

During the writing process, a modulated laser diode projects the beam onto a rotating scanning mirror. As the mirror rotates, the beam reflects off the mirror, first through a set of focusing lenses, off a mirror, and finally through a slot in the top of the toner cartridge, and onto the photosensitive drum. The beam sweeps the drum from left to right, discharging the negative potential wherever the beam strikes the surface. This creates a latent electrostatic image, which later is developed into a visible image. Because the beam is sweeping the entire length of the drum and the drum is rotating, the entire surface area of the drum can be covered. At the end of each sweep, the beam strikes the beam detect lens, generating the Beam Detect Signal (BD). The BD signal is sent to the DC Controller, where it is converted to an electrical signal used to synchronize the output of the next scan line of data.

Step 4: Image developing

At this stage of the process, the latent electrostatic image is present on the drum. The toner particles obtain a negative surface charge by rubbing against the developing cylinder, which is connected to a negative DC supply. The negatively charged toner is attracted to the discharged (exposed, grounded) areas of the drum, and repelled from the negatively charged (non-exposed) areas.
Step 5: Image transferring
During the transferring process, the toner image on the drum surface is transferred to the paper. A positive charge applied to the back of the paper by the transfer roller causes the negatively charged toner on the drum surface to be attracted to the paper. After separation, the drum is cleaned and conditioned for the next image.

Chapter contents 115

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General troubleshooting flowchart
When the AC power is first applied to the printer:
Both the printer motor and the laser/scanner motor rotate for six seconds. All of the LEDs illuminate for one second; the Ready LED will illuminate after three seconds.
AC Power is applied to the printer
If no error message is displayed, the Printer Door is firmly closed, and the toner cartridge is installed, but the motor does NOT rotate when AC power is applied to the printer: Verify that AC power is present at the input power receptacle and that the power cord is firmly inserted into the printer. Verify that FU102 is not open. (See Figure 7-2.) Verify that motor connector J1 is seated into J401 of the DC Controller. (See Figure 7-2.) Verify that the motor is correctly mounted to the printer chassis. If all of these conditions are correct, replace the DC Controller PCA and/or the motor.
Does the Printer Motor rotate in about 6 seconds?
Is the Control Panel functional?
No If the Control Panel is not functional: 3 Verify that the Control Panel connector J9 is seated into both the Control Panel and the Formatter PCA at J3. (See Figure 7-2.) Verify that the Formatter PCA is firmly seated into the DC Controller PCA. Perform an Print Engine Test. (See Figure 7-4.) If the engine test is successful, replace the Control Panel first, then, if necessary, the Formatter PCA. If the engine test is not successful, replace the DC Controller PCA.

Is an Error displayed?

If the control panel displays an error, refer to the appropriate section in this chapter to correct the error.
Continued on following page.

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General Troubleshooting Flowchart (continued) Perform an Engine Test
Is the Engine Test image being printed clearly?
Refer to the section Image Formation Troubleshooting, later in this chapter.
Perform a Control Panel Self-Test
Is the Self-Test image being printed clearly?
No If the engine test produces a clear print image, yet a Self-Test is not generated by initiating the Control Panel self-test procedure, replace the Formatter PCA.

Yes EXIT

General troubleshooting flowchart 117
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Paper path and components

DC Controller PCA

PAPER PICK-UP SENSOR signal (PSNS) PAPER DELIVRY SENSOR signal (POSNS)
PICK-UP SOLENOID SNESOR signal (CPUD)
Paper Input Manual Tray Input Slot
Facedown delivery roller Facedown delivery Deflector Fuser
Pick-up Roller Feed Subroller
Paper Out Sensor Feed Roller

If the mark did not move, inspect the Main Drive assembly 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 have been used.

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High-voltage power supply check
The High-Voltage Power Supply PCA provides the necessary voltages for the electrophotographic processes. A method for verifying the high-voltage system is given in the table below.

Table 7-4 Check

High-voltage power supply check Action
Visually inspect the three connection points on the underside, right end of the toner cartridge. If they are dirty or corroded, clean the connections. Use alcohol only. If damaged, replace the toner cartridge. (See Figure 7-5 below.) This assembly uses spring-loaded pins to contact the toner cartridge. (See Figure 7-6 on the following page.) Verify that the pins are not dirty or corroded and that the spring-loading action is functional. If the pins are dirty, clean using alcohol only; if damaged, replace the High Voltage Connector Assembly.
Toner Cartridge Connection Points
High Voltage Connector Assembly

Figure 7-5

Toner cartridge high-voltage connection points (1 of 2) 3 Charging Drum Ground Developing Roller
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Figure 7-6

Toner cartridge high-voltage connection points (2 of 2) 3 Charging Drum Ground Developing Roller

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Paper curl

Paper curl is inherent to the laser printing processes, and occurs when paper is subjected to heat. Paper curl tends to relax as the paper cools while resting on a flat surface. The specification for maximum paper curl when the paper is lying flat before print is 5 mm (0.2 inches). Although paper curl cannot be totally eliminated, some steps can be taken to lessen its impact, as suggested in the following table.

Table 7-5

Paper curl troubleshooting Recommended action
Try using the front output slot to shorten and straighten the paper path. The recommended printing surface of the page is usually marked on the end of a ream of paper by a small arrow and the phrase print this side first. If the incorrect side was face up, turn the paper over. Load paper into the Paper Input Tray with the recommended printing surface facing the front of the printer. Over time, paper assumes the characteristics of its storage environment. (In a humid environment, paper absorbs moisture. In a dry environment, paper loses moisture.) Paper with higher moisture contents will tend to curl more. Evaluate the storage conditions of the paper. All paper is manufactured differently (texture, moisture content, drying processes, composition, etc.). Change the type of paper being used and reevaluate the paper if curl results.

8-4 8-2 8-2 8-7 8-4 8-4 8-4 8-4 8-5 8-7 8-6 8-4 8-5 8-6 8-6 8-6 8-2 8-6 8-6 8-6 8-6 8-6 8-6 8-6 8-6 8-6 8-6 8-6 8-6

2A 5 14

Alphabetical parts list 167
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Table A-1 Alphabetical parts list (Continued) Description
Delivery Assembly (5L) Delivery Assembly (6L) Delivery Assembly (6L Pro) Delivery Roller #1 Delivery Roller #2 (5L) Delivery Roller #2 (6L and 6L Pro) Delivery Spring #1 Delivery Spring #2 Door Sensor Cable (5L) Door Sensor Cable (6L and 6L Pro) Door Switch Cable (5L) EP/Cover Interlock EP/Cover Interlock EP/Cover Interlock EP Door Assembly (5L) EP Door Assembly (6L) EP Door Chimney (5L) EP Door Chimney (6L) EP Door Chimney (6L Pro) EP Left Hand Guide EP Right Hand Guide #1 EP Right Hand Guide #2 EP/Cover Interlock (5L) EP/Cover Interlock (6L and 6L Pro) Exit Roller (5L) Exit Roller (6L and 6L Pro) Exit Roller Bushing Face-up/Face-down Shaft (5L) Face-up/Face-down Shaft (6L and 6L Pro) Face-up/Face-down Switch (5L) Face-up/Face-down Switch (6L and 6L Pro) Feed Assembly (5L) Feed Assembly (6L and 6L Pro) Flag Flag Spring Formatter Shield (5L) Formatter Shield (6L and 6L Pro) Formatter (Exchange) (5L) Formatter (New) (5L) Formatter (New) (6L and 6L Pro) Front Gear Case Fuse 101 (110 V)
RG5-2012-000CN RG5-3474-000CN RG5-5482-000CN RB1-7284-000CN RB1-7285-000CN RB2-1685-000CN RB1-7286-000CN RB1-7287-000CN RG5-2031-000CN RG5-3662-000CN RG5-2037-000CN RG5-1984-000CN RG5-3453-000CN RF5-3256-000CN RF5-1501-030CN RF5-2352-000CN RB1-7327-000CN RB2-1696-000CN RB2-1697-000CN RF5-1514-000CN RF5-1515-000CN RB1-7341-000CN RG5-1984-000CN RG5-3453-000CN RF5-1521-000CN RF5-2367-000CN RB1-7288-000CN RB1-7276-000CN RG5-3476-000CN RB1-7278-000CN RB2-1644-000CN RG5-1942-000CN RG5-3485-000CN RB1-7293-000CN RB1-7294-000CN RG5-2024-000CN RB2-1719-000CN C3942-69002 C3942-67902 C3991-60001 RB1-7107-000CN VD7-0211-002CN
8-10 8-10 8-10 8-10 8-10 8-10 8-10 8-10 8-6 8-6 8-6 9-3 9-3 8-3 8-2 8-2 8-2 8-2 8-2 8-5 8-5 8-5 8-3 8-3 8-3 8-3 8-3 8-9 8-9 8-2 8-2 8-8 8-8 8-5 8-5 8-6 8-6 8-6 8-6 8-6 8-3 8-6

2 4A 4A

168 Parts index
Service.book Page 169 Thursday, September 14, 2000 11:15 AM
Fuse 101 (220 V) Fuse 102 (110 V) Fuser Cable Guide Fuser Connector Fuser Exit Roller Assembly (5L) Fuser Exit Roller Assembly (6L and 6L Pro) Fuser Paper Guide Fuser Pressure Plate Fuser Release Kit Fuser Release Tab Fuser Roller Bushing (5L) Fuser Roller Bushing (6L and 6L Pro) Gear Kit #1 Gear Kit #2 (5L) Gear Kit #2 (6L and 6L Pro) Gear Plate (5L) Gear Plate (6L and 6L Pro) Ground Clip, Scanner (5L and 6L) Ground Clip, Scanner (6L Pro) Grounding Spring (6L Pro) Guide Sheet Heating Element (110 V) (5L) Heating Element (110 V) (6L) Heating Element (220 V) (5L) Heating Element (220 V) (6L) Heating Element (220 V) (6L Pro) I/O Sheet Metal Idler Roller (5L) Idler Roller (6L and 6L Pro) Idler Roller Shaft Assembly Input Assembly 1 (5L) Input Assembly 1 (6L and 6L Pro) Input Assembly 2 (5L) Input Assembly 2 (6L and 6L Pro) Input Extender 1 (5L) Input Extender 1 (6L) Input Extender 1 (6L Pro) Input Extender 2 (5L) Input Extender 2 (6L and 6L Pro) Input Sensor Assembly JP Protector Kick Plate Spring