OKI MC860n MFP Manual De Usuario

Troubleshooting > 153

If a problem occurs, read through the list of problems and solutions before calling for 

service.
The MFP will not dial a telephone number. Check the power cable and wall outlet. Make 

sure that the telephone line (not external telephone or handset) is connected to the LINE 

socket on the back of the machine. If an external telephone is installed, lift the handset and 

check for a dial tone. If there is no dial tone, there may be a problem with the telephone 

line. If there is a dial tone, the MFP may be using the wrong dialling method (pulse or tone) 

for the region. If alternating tones are heard instead of dialling pulses and the region uses 

pulse dialling, change the call parameters (

).

The display shows a communications error. This indicates any of a number of problems:
•

The MFP may be incompatible with the remote machine, or the remote machine may 

not be able to perform the function requested of it such as polling or confidential 

faxing.

•

The remote machine may also be out of paper or experiencing a paper jam.

•

Bad telephone line conditions can also cause communication errors. Try sending the 

fax again and check to make sure that the correct telephone number is being dialled.

•

If a prefix number must be dialled to get an outside line, or if the call is to an 

international destination, a pause may need to be entered (use the on-screen Pause 

key) after the dial prefix or international dialling code to tell the machine to wait for 

a dial tone. If there are frequent problems communicating with a particular remote 

machine, try programming the telephone number into a speed dial key, and then 

change the parameters for that key (

).

•

Lastly, either the local or remote machine may require servicing. Try sending a fax to 

another location to check the local MFP.

is very poor. If the faxed document has small type, complex illustrations, photos, or is 

very light or very dark, try changing the fax quality and density settings (

and 

). Copy the document on the machine to determine how it will 

transmit. The problem may be caused by telephone line interference. Try sending the 

document again later.
Fax sent but received message was completely blank. Make sure that the document 

is loaded correctly before faxing; with text face UP in the ADF or face DOWN on the glass.
Image of received fax is very poor. Try making a copy of a document on the local 

machine to make sure it is working properly. If there is still a problem, contact the person 

sending the fax and ask them to change their fax quality and density settings. Ask the 

person to make a copy of the document on their machine to ensure that it is working 

properly. Then ask them to send the fax again.
Dialling was tried with a Speed Dial number but nothing happened. Make sure that 

the Speed Dial number being used is programmed correctly.
Local MFP will not answer the telephone or receive faxes. First check to see that the 

power cord is connected properly. Also check the reception mode setting of the machine 

(

). This MFP will not receive faxes automatically if Auto 

Rx is disabled (

of toner. Gently wipe the lens surface of the MFP's LED array, and then check to see if the 

machine is working properly (see 

). If the MFP still does not 

work properly, remove the image drum (see 

), tap 

the toner cartridge, and slowly swing it 20 to 30 degrees vertically several times. Be careful 

not to let the toner leak from the cartridge. If this does not work, the image drum unit may 

need to be replaced. Contact your supplier to get a replacement.