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Other Issues
-163-
Troubleshooting
7
Image Quality Issues
Memo
If the following information does not solve your trouble, contact your dealer.
Transmission and
reception of e-mail
not possible.
Not connected to a wireless access
point.
Check that the wireless access
point power is switched on.
Check the wireless access point
settings, and then try the manual
settings or automatic settings.
Restart the wireless LAN function.
Press the <SETTING> key and
select [Admin Setup] >
[Network Menu] > [Network
Setup] > [Wireless Setting],
and then select [Reconnect
Wireless].
-
Is the e-mail address of the machine
set?
Set the e-mail address of the
machine.
P. 6 6
Did you enter the wrong e-mail
address?
Enter the correct e-mail address. P. 6 6
Is the SMTP server address setting
correct?
Check the SMTP server setting. P.6 6
Is the POP3 server address setting
correct?
Check the POP3 server setting. P. 6 6
Is the DNS server address setting
correct?
Check the DNS server address
setting.
P. 6 6
Is another job running? Wait until the other job finishes. -
Is an error occurring? Follow the instructions displayed on
the display screen of the machine.
P. 1 4 1
Files cannot be saved in
a network file folder.
Is the FTP/CIFS setting right? Check the profile settings. P. 7 7
Is an error occurring? Follow the instructions displayed on
the display screen of the machine.
P. 1 4 1
Symptom Point to check Remedy Reference
Vertical white lines
appear.
The LED heads are dirty. Wipe the LED heads with a soft
tissue paper.
P.178
The toner is low. Replace the toner cartridge. P.172
Foreign material may be present
on the image drum.
Replace the image drum. P.173
The image drum is not installed
properly.
Install the image drum properly. P.173
The ADF document glass is dirty. Clean the ADF document glass. P.176
Printed images are
fading vertically.
The LED heads are dirty. Wipe the LED heads with soft
tissue paper.
P.178
The toner is low. Replace the toner cartridge. P.172
The paper is unsuitable. Use supported paper. -
Symptom Point to check Remedy Reference
163


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Oki ES4191 User Manual - English - 182 pages

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