Canon printer imageCLASS MF5770 User Manual

							LCD Messages9-10
Troubleshooting
9
CHECK PRINTER
Cause A problem has occurred in the machine.
Remedy Reset the machine by opening the front cover and then closing it. If the 
message persists, unplug the machine from the power supply and contact 
Canon Authorized Service Facilities or the Canon Customer Care Center.
CHECK PRINTER COVER
Cause The front cover is not closed completely.
Remedy Check the front cover, and make sure that it is completely closed. 
DOCUMENT TOO LONG
Cause The document is longer than 1 m, or is not feeding correctly.
Remedy Reduce the length of the document to within 1 m, and then copy it.
INSTALL CARTRIDGE
Cause A cartridge is not installed or not installed correctly.
Remedy Install the cartridge correctly. (See “Replacing the Cartridge,” on p. 8-14.)
MEMORY FULL
Cause 1 The machines memory is full because the collate copy or 2 on 1 function was 
set when a large document is loaded.
Remedy Divide the document and copy each part separately. 
If  appears while scanning documents using the ADF, the 
document being scanned stops in the ADF. Press [Set] to make the document 
come out automatically. If the document does not come out, it may be jammed 
in the ADF. Follow the procedure in “Removing Jammed Paper from the ADF,” 
on p. 9-7 to clear the paper jam in the ADF.
Cause 2 You tried to reserve more than 10 copy jobs.
Remedy The machine can store up to 10 copy jobs in memory. Wait until the current copy 
job completes, or use [Status Monitor] to delete the reserved copy jobs in 
memory. 
						

							LCD Messages9-11
Troubleshooting
9
PRINTER DATA ERROR
Cause When you canceled a job being processed, the next job on the spooled job list 
may have been also deleted.
Remedy Check if the job that immediately follows the job being processed has been 
deleted on the spooled job list. Disconnect the USB cable and connect it again, 
or unplug the machine and plug it in again to clear the error message.
REC. PAPER JAM
Cause There is a paper jam.
Remedy Clear the paper jam (See “Clearing Jams,” on p. 9-1) and reload paper in the 
cassette or multi-purpose feeder. Then reset the machine by opening the front 
cover and then closing it.
SUPPLY REC. PAPER
Cause No paper is loaded in the cassette or multi-purpose feeder.
Remedy Load paper in the cassette or multi-purpose feeder. (See “Loading Paper,” on p. 
2-3.) Make sure the paper stack in the cassette does not exceed the capacity of 
the cassette.
Load paper in the multi-purpose feeder one by one.
If you load paper while making copies, do not load a different paper size.
On the second line in the LCD the message  or  and the 
paper size may appear. In this case, load the corresponding paper in the 
cassette or multi-purpose feeder.
SYSTEM ERROR
Exxx*
Cause An error of some kind has occurred in the machine.
Remedy Unplug the machine from the power supply and wait approximately 3 minutes to 
5 minutes, then plug it in again. If this does not solve the problem, unplug the 
machine and contact Canon Authorized Service Facilities or the Canon 
Customer Care Center.
*xxx stands for a number.
TONER SUPPLY LOW**
Cause The toner is running low.
Remedy Remove and rock the cartridge several times to distribute toner evenly.
Then reinstall the cartridge. (See “When to Replace the Cartridge,” on p. 8-4.)
**Only for the MF5750/MF5770 models. 
						

							Paper Feeding Problems9-12
Troubleshooting
9
Paper Feeding Problems
Paper does not feed correctly.
Q Does the cassette or multi-purpose feeder contain an appropriate quantity of 
sheets?
A Make sure the paper stack in the cassette or multi-purpose feeder does not 
exceed the capacity of the cassette or multi-purpose feeder. (See “Loading 
Paper,” on p. 2-3.)
Q Is paper loaded correctly?
A Make sure the paper stack in the cassette or multi-purpose feeder is loaded 
properly, and that the paper guides are adjusted correctly. (See “Loading 
Paper,” on p. 2-3.)
Q Is the cassette inserted into the machine correctly?
A Push the cassette into the machine as far as it will go, and make sure the 
cassette is not tilted or inserted at an angle.
Paper feeds skewed. (Printing is skewed.)
Q Is paper loaded correctly?
A Make sure the paper stack in the cassette or multi-purpose feeder is loaded 
properly, and that the paper guides are adjusted correctly. (See “Loading 
Paper,” on p. 2-3.)
A Make sure the paper exit path is clear.
Multiple sheets feed into the machine at the same time.
Q Is paper loaded correctly?
A Make sure the paper stack in the cassette or multi-purpose feeder is loaded 
properly, and that the paper guides are adjusted correctly. (See “Loading 
Paper,” on p. 2-3.)
Q Have you fanned the paper stack before loading it in the cassette?
A Be sure to fan the paper stack before loading it in the cassette. This keeps the 
sheets of paper from sticking together. 
						

							Paper Feeding Problems9-13
Troubleshooting
9
Q Does the cassette or multi-purpose feeder contain an appropriate quantity of 
sheets?
A Make sure the paper stack in the cassette or multi-purpose feeder does not 
exceed the capacity of the cassette or multi-purpose feeder. (See “Loading 
Paper,” on p. 2-3.)
A Do not force the paper stack into the cassette or multi-purpose feeder.
A Load paper one by one in the multi-purpose feeder.
Q Is only one type of paper loaded in the cassette or multi-purpose feeder?
A Load only one type of paper.
A Make sure you load paper that meets the paper requirements for the machine. 
(See Chapter 2, “Paper Handling.”)
Transparencies do not feed correctly.
Q Are the transparencies loaded correctly?
A Make sure the transparencies in the cassette or multi-purpose feeder is loaded 
properly, and that the paper guides are adjusted correctly. (See “Loading 
Paper,” on p. 2-3.)
Q Is the proper transparency loaded in the multi-purpose feeder?
A Do not use any transparencies designed for color copiers. They will cause a 
paper jam. Please use transparencies recommended by Canon.
Paper feeds curled.
Q Is the proper paper loaded?
A Check if the proper paper is loaded in the cassette or multi-purpose feeder. 
(See Chapter 2, “Paper Handling.”) 
						

							Paper Feeding Problems9-14
Troubleshooting
9
Paper stacked roughly.
Q Is the proper paper loaded?
A Check if the proper paper is loaded in the cassette or multi-purpose feeder. 
(See Chapter 2, “Paper Handling.”)
A Check if the appropriate paper type is selected in  in  of the Menu. (See “Specifying the Paper Type,” on p. 2-11.)
Repeated paper jams occur.
Q Is the proper paper loaded?
A Check that the size, thickness and type of the paper you are using. (See “Print 
Media Requirements,” on p. 2-1.)
Q Is the proper paper loaded correctly?
A Be sure to fan the paper stack before loading it in the cassette. This keeps the 
sheets of paper from sticking together. 
Q Is the output tray free of obstructions?
A Do not place the delivered paper back on the output tray. (See “Face Down 
Paper Output Area,” on p. 2-14.)
A Do not place objects other than paper on the output tray. (See “Face Down 
Paper Output Area,” on p. 2-14.)
Q Is the machine installed in a proper location?
A Check that the machine is installed in the proper location. (For information 
about specifications of the machine, see “Specifications,” on p. 11-1. For safety 
warnings and cautions, see “Installation,” on p. xiv.)
Envelopes do not feed correctly.
Q Are the envelopes loaded correctly?
A Make sure the envelopes are loaded correctly. (See “Loading an Envelope in 
the Multi-Purpose Feeder,” on p. 2-8.)
Q Is the proper envelope loaded?
A Load the recommended envelopes (COM10, MONARCH, DL, or ISO-C5) in the 
multi-purpose feeder. (See “Loading an Envelope in the Multi-Purpose Feeder,” 
on p. 2-8.) 
						

							Copying Problems9-15
Troubleshooting
9
Copying Problems
The machine will not make a copy.
Q Is the cartridge installed correctly?
A Make sure the cartridge is installed correctly. (See the Set-Up Instructions (for 
MF5730/MF5750 users) or Set-Up Instructions for the Machine (for MF5770 
users).)
Q Is the sealing tape removed from the cartridge?
A Remove the sealing tape from the cartridge. (See the Set-Up Instructions (for 
MF5730/MF5750 users) or Set-Up Instructions for the Machine (for MF5770 
users).)
Q Is the cassette inserted completely into the machine?
A Insert the cassette as far as it will go. (See the Set-Up Instructions (for MF5730/
MF5750 users) or Set-Up Instructions for the Machine (for MF5770 users).)
Q Did you connect the power cord to the machine just now?
A Wait for a while. After connecting the power cord, the machine cannot scan 
documents immediately. 
Q Is the document loaded correctly?
A Remove the document, stack it if necessart, and load it in the ADF correctly. 
(See “Loading Documents in the ADF,” on p. 3-4.)
Q Is the energy saver mode off?
A The machine does not scan documents, if it is in the energy saver mode. To 
restore the machine from the energy saver mode, press [Energy Saver].
If the documents have black streaks or appear dirty after you feed them in the ADF.
Q Is the read area of the platen glass clean?
A Clean the read area of the platen glass. (See the “Cleaning the ADF Area,” on p. 
8-2.) 
						

							Print Quality Problems9-16
Troubleshooting
9
Print Quality Problems
The print quality is not what you expect; print is not clear, has missing dots or white streaks.
Q Are the size, thickness and type of the paper you are using within the 
specifications of the machine?
A Check that the paper you are using is supported by the specifications of the 
machine. (See “Print Media Requirements,” on p. 2-1.)
Q Is the cartridge installed correctly?
A Make sure the cartridge is installed correctly. (See the Set-Up Instructions (for 
MF5730/MF5750 users) or Set-Up Instructions for the Machine (for MF5770 
users).)
Q Is any toner left in a cartridge?
A See “When to Replace the Cartridge,” on p. 8-4, and replace the cartridge if 
necessary. (See “Replacing the Cartridge,” on p. 8-14.)
Q Is the exposure adjusted correctly?
A Adjust the exposure correctly using [Exposure]. (See “Adjusting the Exposure 
(Density),” on p. 5-6.)
Copies are dirty.
Q Is the platen glass or the platen glass cover clean?
A Clean the platen glass or the platen glass cover. (See “Cleaning the Scanning 
Area,” on p. 8-2.)
Q Is the cartridge free of damage?
A If there is a scratch on the cartridge, replace with a new one. (See “Replacing 
the Cartridge,” on p. 8-14.)
Q Is the machine adjusted to room temperature? If not, condensation might build 
up inside the machine.
A Allow at least 2 hours for the machine to adjust to room temperature before 
attempting to use it. 
						

							Print Quality Problems9-17
Troubleshooting
9
Q Is the machine installed in a stable location?
A Install the machine in a proper location. (See “Installation,” on p. xiv.)
Copies are too dark or too light.
Q Is the exposure adjusted correctly?
A Adjust the exposure correctly using [Exposure]. (See “Adjusting the Exposure 
(Density),” on p. 5-6.)
Q Is the machine in the toner saver mode?
A Set  to  in  of the 
Menu. (See  of “Menu Descriptions.” on p. 10-4.)
The printouts are partly missing or shaded when you make copies on heavy paper.
Q Is the paper type set correctly?
A Select  or  in  in 
 of the Menu. (See “Specifying the Paper Type,” on p. 
2-11.)
The printouts are missing when you make copies on rough paper.
Q Is the paper type set correctly?
A Select  in  in  of the 
Menu. (See “Specifying the Paper Type,” on p. 2-11.)
The printous are missing when you make copies using the 2 on 1 copy function.
Q Are the documents A4-size or LTR-size?
A Be sure to use two sheets of A4-size or LTR-size documets when you make 
copies using the 2 on 1 copy function.
The edges of copies are dirty when you make copies.
Q Is the paper size set correctly?
A Specify the appropriate paper size in  in  
of the Menu. (See “Specifying the Paper Size,” on p. 2-10.) 
						

							Printing Problems9-18
Troubleshooting
9
Printing Problems
The Alarm indicator comes on.
Q Does the machine feed paper correctly, or is there paper in the cassette or 
multi-purpose feeder?
A Clear the paper jam, or load paper in the cassette or multi-purpose feeder. (For 
instructions on clearing paper jam, see “Clearing Jams,” on p. 9-1. For 
instructions on loading paper, see “Loading Paper,” on p. 2-3.)
A If the machine has no paper jam, or paper is loaded in the cassette or 
multi-purpose feeder, unplug the machine and wait approximately 3 minutes to 
5 minutes, then plug it in again. If the problem is fixed, the Alarm indicator will 
turn off, and the LCD will return to the standby mode. If the Alarm indicator 
remains flash, unplug the machine, and contact Canon Authorized Service 
Facilities or the Canon Customer Care Center.
Printout does not match paper size.
Q Is the paper stack loaded and aligned correctly in the cassette, or is paper 
loaded in the multi-purpose feeder correctly?
A Make sure the paper is loaded and aligned correctly in the cassette or the paper 
is loaded correctly in the multi-purpose feeder. (See “Loading Paper,” on p. 2-3.) 
						

							Scanning Problems9-19
Troubleshooting
9
Scanning Problems
The machine will not scan a document.
Q Did you connect the power cord to the machine just now?
A Wait for a while. After connecting the power cord, the machine cannot scan 
documents immediately. 
Q Is the document loaded correctly?
A Remove the document, stack it if necessary, and load it in the ADF correctly. 
(See “Loading Documents in the ADF,” on p. 3-4.)
A Make sure the ADF is closed.
Q Is the USB cable connected securely?
A Check that the USB cable is connected securely to the machine and your 
computer. Disconnect the USB cable, and reconnect it correctly after a while.
Scanned images are dirty.
Q Is the platen glass or the platen glass cover clean?
A Clean the platen glass or the platen glass cover. (See “Cleaning the Scanning 
Area,” on p. 8-2.)
White streaks appear on the left side of the image.
Q Is the document placed on the platen glass correctly?
A Place the document approximately 1/8 (3 mm) from the edge of the platen 
glass.