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Products & Solutions

Printer

Trouble Shooting

KX-P8420 Troubleshooting

Many problems associated with the printer can be traced to improper setup or cabling.
The following table will assist you in identifying and correcting some of the more common problems.

1.Software

2.Print Quality

3.Network

4.Mechanism

5.Hardware

6.Media

1.Software

Symptom

1-1 KX-P8420 specific features are not available in Adobe PageMaker print dialog.

Possible Cause

PPD (PostScript printer description) file is not copied to the specified folder or KX-P8420 PPD file is not specified in PageMaker print dialog.

Solution

1) Copy PPD file named Pakx2010.ppd located under Windows system folder to the following folders.
For PageMaker6.5, Adobe\PageMaker65\RSRC\UKENGLISH\PPD4
For PageMaker6, Adobe\PM6\RSRC\UKENGLISH\PPD4
2) Select Print Menu of PageMaker.
3) Select "Panasonic KX-P8420" as PPD.
4) Click "Paper" button or "Features" button to enable KX-P8420 specific features.
For more detail, please refer to the PageMaker's manual.

Symptom

1-2 KX-P8420 always print PS error page when printing from Adobe Photoshop.

Possible Cause

The print dialog of Adobe Photoshop has the setting by which user can select data type. (ASCII,Binary,JPEG). Selecting Binary as a data type always produce PS error print and should be avoided.

Solution

Select ASCII or JPEG. Selecting JPEG produces better performance and is recommended.

Symptom

1-3 KX-P8420 cannot print correctly from QuarkXpress ver3.3x.

Solution

Select "Fiery" in "Use PDF for option" in PrinterSetup menu.

Symptom

1-4 The printout has a visible halftone pattern (round dot or rosette pattern as you can see at the offset printing) and looks very harsh.

Possible Cause

The application screen settings are used instead of KX-P8420 resident screen pattern.

Solution

Use the KX-P8420 resident screen pattern. Some application has a option like "Use Printer's default screen" that let KX-P8420 decide which screen, Printer resident screen or the application screen should be used.
Enable this option to activate the printer default screen. This setting can be found in the Print dialog or the dialog evoked from Print dialog or other dialog for setting document information. If you cannot find, please refer to the manual for application.

For Illustrator, Enable "Use Printer's default Screens" in "File"/"Document" menu.
For Photoshop, Click "Setup" button from "Print" dialog. Then click "Screens" button.
Then enable "Use Printer's default Screens".
For Acrobat, enable "Use Printer's default Screens".

*KX-P8420 needs a halftoning process to print a color image. In the process of halftoning, colors and shading are approximated by a pattern of pixels capable of only a limited number of discrete colors. A good example is a newspaper photograph that renders gray tones with only black-and-white pixels.

Symptom

1-5 When printing the Microsoft Office files including imported graphic or images, the color output become much different from the screen. (become bluish).

Solution

Please remove KX-P8420 ICM profile (Pakx2010.icm) if it is installed in the Windows\System\Color folder. If the ICM profile is installed, JPEG, BMP,and TIFF images may not be printed correctly from Microsoft Office 97. The same problem also happens when you create pdf file using Adobe distiller after making ps file using P8420 driver.

Symptom

1-6 You are using the word processor software for Windows 3.1 such as Write or MS Word and Paper source options are shown as "Tray1,Tray2,..." instead of KX-P8420 original tray options such as "Auto(Paper), MPT transparency..." when you open the print dialog or the application paper setup dialog.

Solution

For selecting paper sources for these applications, use KX-P8420 printer properties launched from the print dialog.

Symptom

1-7 KX-P8420 cannot print correctly from WordPerfect for Windows 95 if the file includes graphic pattern.

Solution

1) Launch Notepad and open KX-P8420 PPD file (\Windows\system\Pakx2010.ppd).
2) Edit the file as follows.

*DefaultResolution: 1200x1200dpi -> *DefaultResolution: 600x600dpi
*ImageableArea Letter/Letter: "10.32 12.00 601.68 780.00"
  -> *ImageableArea Letter/Letter: "10.32 15.9 601.68 776.22"
*ImageableArea A4/A4: "11.52 9.96 583.68 831.72"
  -> *ImageableArea A4/A4: "13.44 13.98 581.76 828.06"
*ImageableArea Legal/Legal: "10.32 8.64 601.68 999.36"
  -> *ImageableArea Legal/Legal: "10.32 16.38 601.68 991.74"
*ImageableArea Env10/Env. #10: "10.20 11.76 286.68 672.24 "
  -> *ImageableArea Env10/Env. #10: "10.32 11.82 286.8 672.3"

3) Select "Save" from the "File" menu.
4) Exit Notepad by selecting "Exit" from the "File" menu.
5) Restart Windows.
6) When you printing, please select 1200 x 1200 dpi for the resolution that is included the Device Option tab in printer property.

So if a trouble happens after modifying PPD files, restore PPD file to the original one.
The original one is located under CD-ROM at the following directory if you are using English version of the driver.
  \ENGLISH\PRNTDRVR\DISK1\PAKX2010.PPD.

Symptom

1-8 KX-P8420 cannot print correctly Office97 files including rectangle and oval patterns created using the buttons in Drawing tool bar when these patterns are specified as "Semitransparent" in "Format Autoshape" menu. The overwritten area is not "Semitransparent", but fully overwritten when a pattern overwrites on another pattern.

Solution

1) Launch Notepad and open KX-P8420 PPD file (\Windows\system\Pakx2010.ppd).
2) Edit the file as follows.

*DefaultResolution: 1200x1200dpi -> *DefaultResolution: 600x600dpi
*ImageableArea Letter/Letter: "10.32 12.00 601.68 780.00"
  -> *ImageableArea Letter/Letter: "10.32 15.9 601.68 776.22"
*ImageableArea A4/A4: "11.52 9.96 583.68 831.72"
  -> *ImageableArea A4/A4: "13.44 13.98 581.76 828.06"
*ImageableArea Legal/Legal: "10.32 8.64 601.68 999.36"
  -> *ImageableArea Legal/Legal: "10.32 16.38 601.68 991.74"
*ImageableArea Env10/Env. #10: "10.20 11.76 286.68 672.24 "
  -> *ImageableArea Env10/Env. #10: "10.32 11.82 286.8 672.3"

3) Select "Save" from the "File" menu.
4) Exit Notepad by selecting "Exit" from the "File" menu.
5) Restart Windows.

So if a trouble happens after modifying PPD files, restore PPD file to the original one.
The original one is located under CD-ROM at the following directory if you are using English version of the driver.
\ENGLISH\PRNTDRVR\DISK1\PAKX2010.PPD.

Symptom

1-9 Printing via Parallel port sometimes produces PS error page saying IO error/interrupt error.

Possible Cause

Something is wrong with Parallel cable or cable connection.

Solution

Check the Cable connection at both side (Printer, PC). If the problem still persists, try replacing the cable.

Symptom

1-10 Cannot access to KX-P8420 Fiery WebTools or WebTools do not work properly.

Possible Cause

Network or TCP/IP connection is not established.

Solution

Check Network connection or TCP/IP connection by ping command.

Possible Cause

The Web Browser is not matched to the requirement.

Solution

Use the version of Browser that are specified in the manual.

Possible Cause

The connection settings of the browser has to be changed.

Solution

Check the connection settings of the browser. If proxy server is always accessed, change the setting so that KX-P8420 can be directly accessed.

Possible Cause

Java applet is not set to Enable.KX-P8420 Fiery WebTools are Java based programs and Java applet need to be fully enabled.

Solution

Please follow the procedures described in "Setting up Fiery WebTools in KX-P8420 Operating Instructions manual.

Possible Cause

Ethernet configuration or Network environment has a problem

Solution

Change Ethernet speed of the printer by Ethernet port set up menu. Or if your PC and KX-P8420 is connected to the separate hub or network facilities, reconnect the PC or KX-P8420 so that both are connected to the same network facilities.

Possible Cause

The URL address of the printer is not correct.

Solution

Check the IP address of the printer. Also you should not enter zero before valid values
Ex)
(Correct) http://179.60.27.181 (Wrong) http://179.060.027.181

Symptom

1-11 Cannot access to WebSetup using Internet Explorer 4.01 SP1.

Solution

Change Java VM setting from ” Run in sandbox” to ”Enable”.
1) Select Internet Options in the View menu.
2) Click the Security tab.
3) Click the circle next to Custom (for expert users) in the Local Intranet zone.
4) Click Settings button. The Security Settings window appears.
5) Click Custom in Java permissions, and click Java Custom Settings button.
The Local intranet zone window appears.
6) Click the Edit Permissions tab, and click Enable in Run Unsigned Content.
7) Click OK three times.

Symptom

1-12 Error indicator is blinking.

Possible Cause

The printer has stopped because it detected a user- correctable error such as an open door or a media jam.

Solution

Correct the condition displayed on the printer panel (e.g., close the door or clear the media jam).

Symptom

1-13 Error indicator is on.

Possible Cause

Error occurred that is not user-correctable.

Solution

Turn the printer off and back on again. If the indicator is still on, the printer requires service.

Symptom

1-14 Ready indicator is blinking.

Possible Cause

The printer is receiving, processing or printing job.

Solution

Wait for the job to be completed or cancel the job.

Possible Cause

You have entered the Menu mode in the printer panel.

Solution

Exit the Menu mode by pressing the Menu/Exit button.

Possible Cause

The printer is networked and WebTools are being accessed.

Solution

Close WebTools.

Symptom

1-15 Ready indicator is off.

Possible Cause

The printer is not ready, is disabled, or has detected an error.

Solution

Read the printer panel message to determine the printer status.

Symptom

1-16 Visual Calibration or Color Adjustment can not be performed.

Solution

1)If error or warning messages are shown on front panel LCD,troubleshoot them.
2)If WebTools are used, close them first.
3)If still cannot be performed, turn off/on the printer and try again.

Symptom

1-17 Cannot make a print.

Possible Cause

Printer not operating.

Solution

Make sure that you plugged in the printer and turned it on.

Solution

Make sure that you connected the interface cable(s) properly.

Possible Cause

The appropriate driver is not used.

Solution

If the communication link between your computer and the printer is working but the printer ejects a blank page when printing from your application or through Windows. Make sure that the appropriate driver is installed and that you have selected the printer correctly. Reinstall the driver again.

Symptom

1-18 Fonts or texts shown on the screen do not match to the print outcome.

Possible Cause

The Type1 fonts that correspond to the printer fonts you are using are not installed on your PC.

Solution

Install Type1 fonts by using ATM (Adobe Type Manager) included in "KX-P8420 Driver/Utility" CD-ROM. Please refer to Operating Instructions manual for more detail.

Symptom

1-19 The setting for printing is not effective.

Possible Cause

Some applications may not allow you to change the settings through the KX-P8420 printer driver's setting window or simply ignore the settings.

Solution

Change the application's settings or the printer driver's settings. Please also refer to "readme" file included in "KX-P8420 Driver/Utility" CD-ROM or Drivers and Utilities Reference Guide.

Symptom

1-20 Windows shows Time Out error during printing.

Possible Cause

The amount of printing data to be sent to the printer is too large to print from LPT port.

Solution

Not use Windows print spooler or increase timeout value.
1) Select Start menu->Settings->Printers.
2) Select the icon "Panasonic KX-P8420".
3) Click Right mouse button and select "Properties".
4) Select "Detail" tab.
5) Increase the value of "Not Selected".
Or 5)Click "Spool Settings..." button.
6) Select "Print directly to the Printer".

Symptom

1-21 KX-P8420 Windows 3.1 driver cannot be installed showing the message " This driver cannot be updated because it is currently being used by Windows. Wait until Windows is finished using the driver and then try again".

Solution

Remove the file ctl3dv2.dll under \Windows\system from the MS-DOS prompt and try to install the driver again.

Symptom

1-22 KX-P8420 cannot print correctly when you print via Windows NT.

Solution

Windows NT has a problem about spooling print jobs.
Please select the following setting in driver properties.
1) Select icon "Panasonic KX-P8420" under "Settings"->"Printer" menu of Windows "Start" menu and click mouse right button and select "Properties".
2) Select "Scheduling" tab.
3) Select "Spool print documents so program finishes printing faster" if selected otherwise.
4) Select "Start printing after last page is spooled" .

Symptom

1-23 Euro currency symbol can not be printed.

Solution

KX-P8420 has a resident symbol font. You can print euro symbol by specifying "symbol" font though the character may not look like euro symbol on screen if  "symbol" TrueType font including euro character is not installed on your system.
On Windows 95
(1) Select Symbol font (2) Press Num Lock key (3) Enter Alt+0160 key.
On Macintosh
(1) Select Symbol font (2) Press Option +T

Solution

You can download ATM font for Euro from Adobe site for free.
(http://www.adobe.com/type/eurofont.htm)
Please install ATM included in KX-P8420 driver/utilities CD-ROM. After downloading the ATM font for Euro, register the font by ATM.

Solution

Microsoft or Apple updates the TrueType fonts their system support to accommodate euro character. Please refer to Microsoft or Apple site.
(1) Windows NT SP4 includes the following fonts supporting euro character.
Arial, CourierNew, TimesNewRoman
You can type euro character by entering Alt+0128 after selecting one of above three fonts.
(2) MacOS8.5 has several fonts including euro character as follows.
Apple Chancery, Capitals, Charcoal, Chicago, Courier, Gadged,Geneve,Helvetica, Hoefler Text, Monaco, New York, Palatino, Sand, Skia, Symbol, Techno,Textile,Times
You can type euro character by entering Option-Shift-2 except symbol font which requires you to enter Option-T.
When you want to use these TrueType font, select a kind of font that KX-P8420 does not support as a Printer resident font. KX-P8420 printer driver may converts the font specified on the system to the resident font that has the same name if it has. Because KX-P8420 resident fonts do not support euro symbol except symbol font, the euro character can not be printed correctly. Please refer to KX-P8420 Driver/Utilities Reference guide included KX-P8420 manual CD-ROM for supported KX-P8420 resident font names.

Symptom

1-24 Some characters in a particular font can not be printed.

Solution

Set the options related to the font in Printer Properties back to the default if you have changed any one of them. In Windows 95 Printer Properties, it can be done by clicking default button.

Solution

If a Print dialog of an application you are using has settings related to font handling, change the settings

Solution

Use other font which has the similar type face.

Symptom

1-25 Service Error is displayed on the LCD.

Possible Cause

An error occurred that is not user-correctable.

Solution

Turn the printer off and back on again. If the error persists, call for service.

Symptom

1-26 When there are some image data as object, "Watermark" is hidden under its object.

Solution

This is caused on Adobe PostScript printer driver's function. Generally, if object is existing on the background, its object becomes to top in order.
If you want to bring the Watermark to top, please un-check "In background" in the Watermark tab of printer property.

Symptom

1-27 Cannot specify Middle, Lower tray in paper source setting of Macintosh Print dialog. Or Cannot enable Check&Print or Electronic Collation in device specific feature setting of Macintosh Print dialog.

Possible Cause

Hard Disk or 2nd feeder is not specified as installed options.

Solution

1) Click the Chooser from Apple menu.
2) Click the AdobePS printer icon in the chooser.
*If necessary, you may need to specify the Appletalk zone in which your printer is located. 3) Select the name of the printer and queue combination from the scroll list.
ex) KX-P8420_Direct 5) Confirm an icon appeared to the left of the printer name selected in step 3) and click OK.
6) Select the name of the KX-P8420.
7) Click Setup...
8) In the windows that appears, click Configure button.
9) From the pop-up menus, specify the device options installed on your printer. Click OK.
10) Click OK.
11) Close the Chooser.

Symptom

1-28 After installing KX-P8420 printer driver on MacOS 8.1, 8.5 or 8.6, Apple LaserWriter8 become unavailable showing "This printer driver can not be used because the printing libraries are out of date. the PrintingLib file in the Extensions folder must be Apple Computer's version 8.6.5 or greater."

Possible Cause

During installation, system file "PrintingLib" in "Extensions" holder is overwritten by the counterpart of KX-P8420 driver.
KX-P8420 : PrintingLib ver8.5.1(Adobe)
MacOS 8.1 : PrintingLib ver8.5.1(Apple)
MacOS 8.5 : PrintingLib ver8.6
MacOS 8.6 : PrintingLib ver8.6.5

Solution

If you download the latest version Adobe PostScript driver ver 8.6 (as of August 6 1999) for Macintosh and install, Apple LaserWriter8 become available.
Instruction of downloading for Macintosh
1) Install KX-P8420 Macintosh driver
2) Download the latest version (Version 8.6) Macintosh driver from the following URL.
http://www.adobe.com/support/downloads/External Site 3) Double click the download file. "Adobe postscript driver setup" program is launched. Follow the instruction shown on the screen.

NOTE: The above procedure is subject to change with the update of the driver.

Symptom

2-1 A piece of the printed image is missing and reappears out of place, approximately 129 mm (5'') down the page.

Possible Cause

The fuser's internal roller is not being consistently oiled or the fuser's internal roller is contaminated with toner particles.

Solution

Print 5-10 pages of blank pages to clean the roller.
If you still see the problem:
- Replace the oil supply roll.
If you still see the problem:
- Replace the fuser.

Symptom

2-2 A single color appears faded.

Possible Cause

The toner is almost depleted.

Solution

Replace the color toner cartridge soon (depending on the complexity of your prints, you can continue to print up to 100 more pages).

Possible Cause

The color density is set incorrectly in the printer panel.

Solution

See "Chapter 7 Color Calibration" in Operating Instructions Manual.

Symptom

2-3 A single color has a sharp, dark or light vertical streak.

Possible Cause

The toner cartridge is almost depleted and is not properly applying toner.

Solution

Replace the color toner cartridge.
color has a striek

Symptom

2-4 A single color is not uniform or many vertical streaks (both light and dark) of slightly different density and non-uniform color.

Possible Cause

The toner is almost depleted.

Solution

Replace the color toner cartridge.
color not uniform

Symptom

2-5 A single color shows a light, repeating horizontal line.

Possible Cause

The roller in the toner cartridge has a slight impression after a long period of storage.

Solution

Run 20-30 prints. The impression will disappear with continued time and use.
color has a horizontal line

Symptom

2-6 A single white spot appears in approximately the same vertical place on the page.

Possible Cause

The color imaging unit is damaged.

Solution

Replace the color imaging unit.
white spot on same place

Symptom

2-7 Dark color spots and dark or light streaks appear in all colors.

Possible Cause

The color imaging unit has reached its useful life.

Solution

Replace the color imaging unit.

Symptom

2-8 Dark and wavy vertical streaks appear in all colors.

Possible Cause

The main charge grid is dirty.

Solution

Replace the color imaging unit.
dark wavy striek

Symptom

2-9 Each color "bleeds" into the color band.

Possible Cause

The color imaging unit's internal waste toner box is full.

Solution

Replace the color imaging unit.
each color bleeds

Symptom

2-10 Halftone area has areas of weak color.

Possible Cause

Paper doesn't match the environmental conditions, or it has too much moisture.

Solution

  • Try fresh paper, or another type of paper.
  • Store media in the original, dust-free package in the same environmental conditions as the printer.

halftone area

Symptom

2-11 Images are printed on the off-set areas.

Solution

Check your application or printer driver settings for correct image sizing.

Symptom

2-12 Images are printed cut-off.

Solution

Check your application or printer driver settings for image sizing.

Solution

Make sure that the correct size media is in the media tray.

Symptom

2-13 Image is very faded or pieces of the image are missing; toner on the page is loose.

Solution

When using the multi-purpose tray, make sure that you have selected the correct media type in the driver.

Symptom

2-14 Large light spot(s) appear randomly.

Possible Cause

Fingerprint(s) on the underside belt or photosensitive belt (inside) of the color imaging unit.

Solution

Print several pages until the spots fade.
Large light spot

Symptom

2-15 Light vertical streaks appear in all colors.

Possible Cause

The main charge grid is dirty.

Solution

Replace the color imaging unit.
light vertical striek

Symptom

2-16 One or more dark vertical lines appear on the print in all colors.

Possible Cause

The color imaging unit is scratched.

Solution

Replace the color imaging unit; make sure that the old color imaging unit is not exposed to light for more than 45 seconds. If a new color imaging unit does not correct the problem: - Put the old color imaging unit back into the printer. - Repack the new color imaging unit.

Possible Cause

The fuser is damaged.

Solution

Replace the fuser.
dark vertical line

Symptom

2-17 Prints are missing fine-line detail.

Possible Cause

The color imaging unit has reached its useful life.

Solution

Replace the color imaging unit.

Possible Cause

Original image has lost the detail due to compression or other reasons.

Solution

Use the original that has more fine detail.

Symptom

2-18 Prints have dull, faded colors.

Solution

Adjust or calibrate colors. See "Chapter 7 Color Calibration" in Operating Instructions manual.

Solution

Make sure that the color imaging unit stays covered until immediately before installing it in the printer. Exposure to light for more than 45 seconds can damage the color imaging unit.

Solution

Make sure that the toner cartridges are installed correctly.

Solution

Make sure that you use a high-quality laser paper: 60-105 g/m² (16-28 lbs.) paper in the media trays and 75-165 g/m² (20-44 lbs.) paper in the multi-purpose tray.

Symptom

2-19 Prints have much darker or brighter color than the image shown on a screen.

Solution

Check the printer driver's color settings. Setting "Three color mode" (CMY) or "off" as "RGB source" tend to produce darker print outcome. Or if the higher value is selected as Brightness Settings, Printout become darker.

Solution

Check Brightness settings of Front Panel "Color Adjustment" menu.

Solution

Adjust or Calibrate colors. See "Chapter 7 Color Calibration" in Operating Instructions manual.

Solution

JPEG,BMP,TIFF images in Microsoft Office97 document are printed incorrectly if ICM profile is installed in the Color folder under Windows System folder. Please remove ICM profile named Pakx2010.icm

Symptom

2-20 Prints have streaks or spots.

Solution

Most spots are caused by fingerprints or dust introduced into the printer while installing the color imaging unit or loading media. Make sure that the surface where you unpack the color imaging unit, paper, and transparencies is free of dust. Keep supplies in a covered area or a closed box.

Solution

Make sure that the color imaging unit stays covered until immediately before installing it in the printer. Exposure to light can damage the color imaging unit and will produce light streaks or faded prints.

Solution

Do not touch the right side or underside of the color imaging unit; fingerprints affect print quality. To get rid of fingerprint spots, print a few prints.

Solution

Make sure that the paper or transparency film is clean.

Solution

Make sure that you handle the media on the outside edges to avoid fingerprints. To get rid of fingerprint spots, print a few prints.

Symptom

2-21 Straight, thin light vertical line in colors.

Possible Cause

The photosensitive belt inside the color imaging unit is scratched.

Solution

Replace the color imaging unit.
straight vertical line

Symptom

2-22 The back of the printed page appears dirty.

Possible Cause

Toner particles have contaminated the transfer roller. This can happen if the printed image is larger than the media (for example, when printing on envelopes). Check the application's settings or the printer driver's settings. Run 10-20 prints to clean the transfer roller.

Symptom

2-23 The entire page prints in black, including the borders.

Possible Cause

Bad electrical contact for the main charge grid.

Solution

Reinsert the color imaging unit to correct the contact for the main charge grid.

Possible Cause

The main charge grid is broken.

Solution

Replace the color imaging unit.
entire page black

Symptom

2-24 The page is completely blank.

Possible Cause

The problem could be with one of the following: - Engine control board. - Developer voltage. - Laser scanning unit mirror.

Solution

Turn the printer off and back on again. If the problem persists, call for service on your printer.
page blank

Symptom

2-25 The page prints in black in the image area only. (The borders are clear.)

Possible Cause

Either the image processor board or engine control board is not functioning properly.

Solution

Turn the printer off and back on again. If the problem persists, call for service on your printer.
black image area

Symptom

2-26 The surface of the printed image appears to have vertical scratches.
(visible by holding the print at an angle and observing the "shine" of the image). At first, the scratches appear only on the printed image; eventually, dark vertical scratches appear on the imprinted portion of the page.

Possible Cause

The fuser is near its useful life.

Solution

Replace the fuser (depending on your quality needs, you can continue to print until the dark vertical lines appear).

Symptom

2-27 Toner spots appear on the back of the media.

Possible Cause

The transfer unit is worn out.

Solution

Replace the transfer unit.

Symptom

2-28 Image quality of transparency is not good when it is projected on to the screen. Especially yellow color does not look good and become grayish.

Possible Cause

You are using the type of transparency that is not suited for printing with KX-P8420.

Solution

If you want to have the better quality, please use CG3710.
1) First of all, please make sure if you are using recommended transparency like CG3700, CG3710. Other transparency might be resulted in damaging fuser.
2) Please make sure if you have changed the paper source setting to transparency in the driver properties. Please note that fuser temperature setting is different on each media type. So you need to change the setting whenever you want to print on different media.
3) Please make sure if you are using the correct side of the transparency. Although it says both side can be used as the specification of transparency, there is a difference in terms of print quality between the front side and the back side. Please do not use the back side.
4) Printing CG3710 may cause it being wrapped around the roller inside the fuser unit in case the transparency is set the other way around.
Please note that:
When you print transparency from Multi Purpose Tray, please set with its label side down (There should be some label attached on a side of sheet.) and specify MPT transparency as Paper source in KX-P8420 Printer driver Properties
When you print transparency from Transparency cassette, please set with its label side up and specify Auto(Transparency) in KX-P8420 Printer driver Properties.

Symptom

2-29  Darker area of a print out has a poor color. (brownish and has no detail)

Possible Cause

You may have chosen "Three color mode" or CMY mode in the setting of KX-P8420 Printer Properties. Because black color is substituted with the combination of 3 color(C,M,Y) in "Three color mode", the darker area is not printed clearly and tend to become brownish and lose the detail.
Select this option only when you want to produce draft copies of color documents quickly and you do not care much about print quality. Otherwise select CMYK mode or Colorwise Business color (Windows 95 driver only).

Symptom

3-1 Windows spooler show Printer error and jobs cannot be printed
when printing from Windows NT4.0 using lpr port.

Solution

1) Open KX-P8420 Printer Properties. Select "Scheduling" tab. Enable "Spool print document so program finishes printing faster". And then enable "Start printing after last page is spooled."
2) If it does not work, install NT driver again by double clicking Add Printer.
3) If still does not work, try to change IP address of the printer if another IP address is available and set printer port setting again.

Symptom

3-2 Can print to P8420 via Netware3.x file server, but cannot via Netware4.x.

Possible Cause

Frame type is not correctly set up.

Solution

Change Frame type by WebSetup.

Possible Cause

Print Server is not loaded on Netware4.x file server.

Solution

Corrective Action: Load Print Server.

Symptom

3-3 Cannot print via Netware file server because print jobs remain on the queue on the server.

Possible Cause

Print Server is not loaded.

Solution

Load Print Server.

Possible Cause

Printing via Netware server is not correctly set up.

Solution

Try to set up again according to the procedure described in the manual.

Symptom

3-4 Cannot print to P8420 through Network.

Possible Cause

Network cable is not properly connected or network devices such as Hub do not work properly. If you cannot reach to P8420 by ping command after network installation, this is likely to be the cause.

Solution

Check Printer and PCs are properly connected or network devices work properly.

Possible Cause

IP address or Subnet mask is not properly set. If you cannot reach to P8420 by ping command after network installation, this is likely to be the cause.

Solution

Check IP address or Subnet mask of printer. If printer IP address is duplicated with other device, it should be changed. Or Subnet mask should be consistent.

Possible Cause

KX-P8420 WebTools are opened simultaneously at the several location. WebSetup and WebSpooler uses Network port until they are closed. So network printing might fail because of shortage of available Network port.

Solution

Close WebTools.

Possible Cause

Network setting is not correctly configured.

Solution

Configure the network setting again following the instructions described in the KX-P8420 Operating Instruction manual.

Symptom

4-1 Frequent media jams occur.

Solution

Make sure that you use a high-quality laser paper: 60-105 g/m² (16-28 lbs.) paper in the media trays and 75-165 g/m² (20-44 lbs.) paper in the multi-purpose tray.

Solution

If you are using media that is 105 g/m² (28 lbs.), check if the Face Down media output setting is selected in the driver. If it is, change the setting to Face Up.

Solution

Use only recommended transparencies.

Solution

Make sure that the media is installed under the hooks at the front of the media tray.

Solution

Do not overfill the media tray, as indicated by the red line on the right side of the tray.

Solution

Clean the paper-pick rollers.

Solution

Make sure that the media thickness switch is set correctly for the installed media.

Symptom

4-2 Frequent paper-picking errors occur.

Solution

Fan the paper or transparencies before installing them in their respective trays; this is especially important for transparencies because they tend to stick together.

Solution

Make sure that you have loaded paper in the paper tray and transparencies in the transparency tray.

Solution

Make sure that the media is installed under the hooks at the front of the media tray.

Solution

If printing on transparencies and your printer has a 2nd Cassette Feeder, make sure that the transparency tray is installed in the upper or middle tray slot.

Solution

Clean the paper-pick rollers.

Symptom

5-1 Cannot print the Test Page or Color calibration setting pattern. "Load Letter" or "Load A4" message are appeared on the LCD.

Possible Cause

You might change the default paper tray to option paper tray which different paper size.

Solution

Test Page and Color calibration setting pattern data are designed for the default paper size. Please use the default paper size tray.
For North and South America country : Letter size paper tray KX-PKC3
For the rest of world : A4 size paper tray KX-PKC4

Symptom

6-1 Media frequently wraps around the fuser.

Possible Cause

Not using the specified media type.

Solution

Try using the specified media type and do not use the type of papers that should be avoided. Be extremely careful when you do two-sided printing. Please refer to "Appendix" of KX-P8420 Operating Instructions manual in more detail.

Possible Cause

The oil supply roll has reached its useful life.

Solution

Replace the oil supply roll.

Symptom

6-2 Small white spots appear on OHP transparency.

Possible Cause

OHP transparency has dust on its surface.

Solution

Remove dust or stain from OHP transparency.
small white spots

Symptom

6-3 Not enough toner is attached on transparency.

Possible Cause

You are using the type of transparency that is not suited for printing with KX-P8420.

Solution

Please use 3M CG3700 or CG3710.
If you want to have the better quality, please use CG3710.
1) First of all, please make sure if you are using recommended transparency like CG3700, CG3710. Other transparency might be resulted in damaging fuser.
2) Please make sure if you have changed the paper source setting to transparency in the driver properties. Please note that fuser temperature setting is different on each media type. So you need to change the setting whenever you want to print on different media.
3) Please make sure if you are using the correct side of the transparency. Although it says both side can be used as the specification of transparency, there is a difference in terms of print quality between the front side and the back side. Please do not use the back side.
4) Printing CG3710 may cause it being wrapped around the roller inside the fuser unit in case the transparency is set the other way around.

Please note that:
When you print transparency from Multi Purpose Tray, please set with its label side down (There should be some label attached on a side of sheet.) and specify MPT transparency as Paper source in KX-P8420 Printer driver Properties
When you print transparency from Transparency cassette, please set with its label side up and specify Auto(Transparency) in KX-P8420 Printer driver Properties.

Symptom

6-4 Frequent JAM occur when printing on a transparency.

Possible Cause

You are using the transparency for ink jet printer.

Solution

Do not use the transparency for ink jet printer because it has a higher possibility of being wrapped around the roller inside the fuser unit.

Possible Cause

You are printing on the back side of the transparency.

Solution

Please use the face side only, and do not use the back side.

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