Canon printer PIXMA MX850 User Manual

							
147
Troubleshooting
Paper Does Not Feed  from the Paper Source 
Specified in the Printer Driver
Too much paper loaded. Make sure that the paper stack does not exceed the paper load limit. However, 
proper feeding of paper may not be possible at this maximum capacity 
depending on the type of paper or environmental conditions (either very high or 
low temperature and humidity).
In such cases, reduce the sheets of paper you load at a time to around half of 
the paper load limit.
For details on loading paper, see “Loading Paper” on page 26.
Foreign object in the Rear Tray or 
Cassette. Make sure that there are no foreign objects in the Rear Tray or Cassette.
Envelopes not prepared or loaded 
properly. When printing on envelopes, load them in the machine in portrait orientation. If 
the envelopes are placed in landscape orientation, they will not feed properly.
For details on loading envelopes, see “Loading Envelopes” on page 30.
Inner Cover is not completely closed. Close the Inner Cover completely. Paper does not feed properly if the Inner  Cover is even slightly open.
CauseAction
The paper source is specified in the 
data created by an application 
software.When the paper source setting is inconsistent between an application program 
and the printer driver, the application software setting takes precedence.
Change the application software setting corresponding to the printer driver 
setting, or click 
Print Options on the Page Setup  sheet in the printer driver and 
select  Disable the paper source setting of the application software  on the 
Print Options  screen.
For the print option setting, refer to the  PC Printing Guide on-screen manual.
CauseAction 
						

							
148Troubleshooting
Paper Jams
Important
When you turn off the machine to remove the jammed paper, make sure of the following.
zWhen you are printing from the computer, cancel the print job before turning off the machine. Refer to 
“Printing from Your Computer” in the  User’s Guide on-screen manual. 
z While the machine is receiving a fax (in memory), you cannot turn off the machine. Turn it off after 
receiving the fax. Do not disconnect the power cord while the machine is receiving a fax. If you 
disconnect the power cord, all the documents stored in memory are deleted.
CauseAction
Paper jammed in the Paper Output Slot 
or the Rear Tray. Remove the paper following the procedure below.
(1)
Slowly pull the paper out, either from the Rear Tray or from the Paper Output 
Slot, whichever is easier.
z If the paper tears and a piece remains inside the machine, turn the machine 
off, open the Scanning Unit (Printer Cover), and remove the paper.
* Be careful not to touch the components inside the machine.
After removing all paper, close the Scanning Unit (Printer Cover), and turn 
the machine on.
z If you cannot pull the paper out, turn the machine off and turn it back on. The 
paper may be ejected automatically.
(2) Reload the paper in the machine, and press the  OK button on the machine.
If you turned off the machine in step (1), all print jobs in queue are canceled. 
Reprint if necessary.
Notez For details on how to load paper, see “Loading Printing Paper” on page 20.
z When reloading the paper in the machine, see “Paper Does Not Feed 
Properly” on page 146 to confirm that you are using the correct paper and 
are loading it into the machine correctly.
z A5-sized paper are suited to print documents consisting mainly of text. We do 
not recommend using such paper to print documents with photos or graphics, 
since the printout may curl and cause paper exit jams.
If you cannot remove the paper or the paper tears inside the machine, or if the 
paper jam error continues after removing the paper, contact your Canon service 
representative. 
						

							149 Troubleshooting
Landscape credit card-sized paper 
jammed inside the machine.Do not load credit card-sized paper in the landscape orientation.
Remove the paper following the procedure below.
(1)Load a single sheet of the same paper in the Rear Tray in portrait orientation.
Do not load it in the landscape orientation.
(2)Turn off the machine.
(3)Turn on the machine.
The paper is fed and then pushes out the jammed paper as it ejects.
All print jobs in queue are canceled. Reprint if necessary.
If you cannot remove the jammed paper or the paper jam error continues after 
removing the paper, contact your Canon service representative.
Landscape 4 x 6 / 101.6 x 152.4 mm 
paper loaded in the Cassette jammed 
inside the machine.Always load 4 x 6 / 101.6 x 152.4 mm media in portrait orientation regardless 
of the printing orientation.
Remove the paper following the procedure below.
(1)Turn off the machine, then open the Rear Cover.
(2)Fold a piece of A4 or Letter-sized plain paper in four, push it in until it hits the 
jammed paper, then pull out the paper folded in four. 
(3)Close the Rear Cover, then turn on the machine.
Wait until the jammed paper is automatically ejected. 
All print jobs in queue are canceled. Reprint if necessary.
If you cannot remove the jammed paper or the paper jam error continues after 
removing the paper, contact your Canon service representative.
CauseAction 
						

							
150Troubleshooting
Paper jammed inside the machine at 
the transport unit. Remove the paper following the procedure below.
(1)
Open the Rear Cover.
(2) If you can see the jammed paper, slowly pull the paper out.
z Be careful not to touch the components inside the machine.
z If you cannot pull the paper out, close the Rear Cover, turn the machine off, 
and turn it back on. The paper may be ejected automatically.
(3) Close the Rear Cover.
(4) If you were not able to remove the paper out in step (2), remove the 
Cassette.
(5) Slowly pull the jammed paper out.
(6) If any paper is sticking out of the Cassette, align the edges of the paper to 
reload it in the Cassette.
(7) Insert the Cassette into the machine, and press the  OK button on the 
machine.
If you turned off the machine in step (2), all print jobs in queue are canceled. 
Reprint if necessary.
NoteWhen reloading the paper in the machine, see “Paper Does Not Feed Properly” 
on page 146 to confirm that you are using the correct paper and are loading it 
into the machine correctly. 
If you cannot remove the paper or the paper tears inside the machine, or if the 
paper jam error continues after removing the paper, contact your Canon service 
representative.
CauseAction 
						

							
151
Troubleshooting
Paper jammed inside the machine at 
the Duplexing Transport Unit. Remove the paper following the procedure below.
(1)
Remove the Cassette.
If the paper is loaded in the Rear Tray, remove the paper from the Rear Tray 
and close the Rear Tray Cover.
(2) Turn off the machine.
(3) Stand the machine with the left side down.
CautionWhen standing the machine, make sure that the Scanning Unit (Printer Cover) 
is closed securely and the machine does not fall over.
(4)Slowly pull the jammed paper out while pulling the green cover toward you.
CautionSet the machine back to its original position immediately after removing the 
jammed paper.
(5)Insert the Cassette into the machine, and turn on the machine.
Reload paper in the Rear Tray, if necessary.
All print jobs in queue are canceled. Reprint if necessary.
NoteWhen reloading the paper into the machine, see “Paper Does Not Feed 
Properly” on page 146 to confirm that you are using the correct paper and are 
loading it into the machine correctly.
If you cannot remove a sheet of paper or a teared piece of paper inside the 
machine, or if the paper jam error continues after removing the paper, contact 
your Canon service representative.
CauseAction 
						

							152Troubleshooting
Document Jams in the ADF
Important
When you turn off the machine to remove the jammed document, make sure of the following.
zWhile the machine is receiving a fax (in memory), you cannot turn off the machine. Turn it off after 
receiving the fax. Do not disconnect the power cord while the machine is receiving a fax. If you 
disconnect the power cord, all the documents stored in memory are deleted.
CauseAction
The document remains in the ADF 
because the Stop/Reset button is 
pressed when the machine is scanning 
the document. If you press the Stop/Reset button during scanning, “Document in ADF. Press 
OK to discharge document.” appears on the LCD. Press the OK button so that 
the remaining document is automatically fed out. 
						

							
153
Troubleshooting
Document jams in the ADF (Document 
Tray). Remove the document following the procedure below.
(1)
If printing is in progress, press the  Stop/Reset button.
(2) Turn off the machine.
(3) If a multi-page document is loaded, remove any pages other than the 
jammed page from the ADF, then open the Document Feeder Cover.
(4) Raise the Paper Release Lever (A), then remove the jammed page from 
under the roller to the Document Feeder Cover side.
(5) Pull out the jammed document from the ADF.
If the document cannot be pulled out with ease, follow the procedure in 
“Document jams in the ADF (inner side).” on page 154.
(6) Press down the Paper Release Lever (A), close the Document Feeder 
Cover, then turn on the machine.
z When rescanning the document after clearing the error, rescan it from the 
first page.
If you cannot remove the document or the document tears inside the machine, 
or if the document jam error continues after removing the document, contact 
your Canon service representative.
NoteThe document may not feed properly depending on the media type, or your 
environment, such as when the temperature and humidity are either too high or 
too low.
In this case, reduce the number of document pages to approximately half of the 
loading capacity. See “Original Document Requirements” on page 16.
If the document still jams, use the Platen Glass instead.
CauseAction
(A) 
						

							154Troubleshooting
Document jams in the ADF (inner side). Remove the document following the procedure below.
(1)If printing is in progress, press the Stop/Reset button.
(2)Turn off the machine.
(3)If a multi-page document is loaded, remove any pages other than the 
jammed page from the ADF.
(4)Open the Document Output Slot.
(5)Open the Document Cover.
(6)Insert your hand into the Document Output Slot, then while pushing up the 
part above the paper feed rollers with your fingers, pull out the document 
from the inner side of the Document Cover.
(7)Close the Document Cover.
(8)Close the Document Output Slot, then turn on the machine.
zWhen rescanning the document after clearing the error, rescan it from the 
first page.
If you cannot remove the document or the document tears inside the machine, 
or if the document jam error continues after removing the document, contact 
your Canon service representative.
CauseAction 
						

							155 Troubleshooting
Document Jams in the ADF (Document 
Output Slot).If the document is jammed in the Document Output Slot, open the Document 
Output Slot as shown in the figure below and pull out the document.
zWhen rescanning the document after clearing the error, rescan it from the 
first page.
If you cannot remove the document or the document tears inside the machine, 
or if the document jam error continues after removing the document, contact 
your Canon service representative.
CauseAction 
						

							
156Troubleshooting
Message Appears on  the Computer Screen
„Writing Error/Output E rror/Communication Error
CauseAction
The machine is not ready. Check if any lamp on the Operation Panel is lit.
If all the lamps on the Operation Panel are off, press the  ON/OFF button to turn 
on the machine. While the  COPY button is flashing, the machine is initializing. 
Wait until the  COPY button stops flashing and remains lit.
If the  Alarm  lamp is lit orange, an error may have occurred in the machine. For 
details on how to resolve the error, see “An Error Message Is Displayed on the 
LCD” on page 133.
The machine is not connected properly. Make sure that the USB cable is securely plugged into the USB port of the  machine and is connected to the computer.
zIf you are using a relay device such as a USB hub, disconnect it, connect the 
machine directly to the computer, and try printing again. If printing starts 
normally, there is a problem with the relay device.
Consult the reseller of the relay device for details.
z There could also be a problem with the USB cable. Replace the USB cable 
and try printing again.
When you use the machine over wired LAN, make sure that the machine is 
connected to the network with a LAN cable and is set up correctly. Refer to 
“Checking Information about the Network” in “Troubles When Using the 
Machine over Network” of the  User’s Guide on-screen manual.
Printer port setting does not match the 
computer’s interface connecting the 
machine. Check the printer port settings.
* In the following instruction, “
XXX” signifies your machine’s name.
(1) Log into a user account with the administrator privilege.
(2) Click  Control Panel , then Printer  under Hardware and Sound .
In Windows XP, click  Control Panel, Printers and Other Hardware , then 
Printers and Faxes .
In Windows 2000, click  Control Panel then Printers .
(3) Right-click the  Canon XXX Printer  icon, then select Properties.
(4) Click the  Ports tab to confirm the port settings.
Make sure that a port named  USBnnn (where “n” is a number) with  Canon 
XXX Printer  appearing in the  Printer column is selected for  Print to the 
following port(s) .
If the port setting is not correct, change the port setting according to the 
interface you are using, or reinstall the MP Drivers.
NoteWhen the machine is used over wired LAN, the port name of the machine is 
displayed as “CNBJNP_xxxxxxxxxxxx”.
* “xxxxxxxxxxxx” is the character string generated from the MAC address or a 
character string specified by the user when setting up the machine.
MP Drivers are not installed properly. The MP Drivers may not be installed properly. Uninstall them following the  procedure described in the PC Printing Guide on-screen manual and reinstall 
them following the procedure described in your setup sheet or the  Network 
Setup Guide .