Clean, Attractive Printing Is Impossible - Roland SJ-740 User Manual

The media width cannot be detected, even when the [SETUP] key is pressed.
Is [SHEET TYPE] set to [CLEAR]?
When [SHEET TYPE] is set to [CLEAR], the width of the media is not detected during media setup (and the printable
width is set to maximum).
When transparent media is loaded, specify a printing area that matches the actual width of the media. (Refer to "3-5
Using Transparent Media")
If opaque media is loaded, set [SHEET TYPE] to [OPAQUE].
Is the width of the loaded media 210 mm or less?
When media having a width of 210 mm or less is loaded, the width is not detected during media setup. Load media that
is at least 210 mm wide and perform setup again.

Clean, Attractive Printing Is Impossible

If drop-out occurs with printed images.
Clean the printing heads (see "4-1 Cleaning the Printing Heads").
The printed images are not clean.
Clean the platen and pinch rollers. (see "4-4 Other Cleaning Tasks")
The printing heads scrape the surface of the media.
Is the loaded media very thick?
If media feed is not smooth because the media catches on the head, then adjust the height of the printing heads (see "2-
2 Loading Media -- When Loading Thick Media").
When the height of the printing head has been adjusted, it is necessary to perform bidirectional correction. For more
information about bidirectional correction, see "3-6 Making Corrections for Printing -- Bidirectional Correction".
If you are using media that becomes uneven when printed, then perform unidirectional printing. With unidirectional
printing, unevenness is less conspicuous than bidirectional printing.
Also, if the printing heads scrape the media even when the heads are raised, then do not use that media.
Doing so may not only cause paper jams, but may soil the media (the printing surface) and impair printing accuracy.
The results of printing are coarse.
Has feed correction been performed?
Correcting the amount of feed improves the dot-positioning accuracy in the feed direction, which can help enhance
image quality.
If the type of media was changed, refer to "3-6 Making Corrections for Printing -- Feed Correction" and perform correc-
tion for feed.
Has bidirectional correction been performed?
If misalignment like in the example occurs when perform-
ing bidirectional printing, then carry out correction at the
[BIDIRECTION] menu (see "3-6 Making Corrections for
Printing -- Bidirectional Correction").
Be sure to make this setting when you have replaced the
media with a different type, or if you have adjusted the
head height and printing is misaligned.
[EXAMPLE]
OK: Correct
Not OK: Single lines not produced
Chapter 6 What to Do If...
6-1 What to Do If...
85