Sharp M160D Посібник з експлуатації - Сторінка 28

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SCANNING PROBLEMS

Problem

Poor scanning

quality.

Poor scanning

quality.

Cause and solution

The document glass or the underside of the document

cover/SPF is dirty.

→ Clean regularly.

The original is smudged or blotchy.

→ Use a clean original.

You have not specified a suitable resolution.

→ Make sure that the resolution setting in the scanner driver is

appropriate for the original.

You are scanning a large area (for example an entire 11" x

17" or A3 document) at high resolution.

→ If you attempt to scan a large area at high resolution and there is insufficient

memory in the machine to hold the scanned data, scanning will take place at

a lower resolution and the scanner driver will enhance the data to make up

for the lower resolution. However, the quality of the enhanced image will not

be as high as if scanning took place at the higher resolution.

To scan a ledger or A3 original in full color at 600 dpi without using

enhancement, the 256 MB memory option is required.

You have not specified a suitable value for the "B/W

Threshold" setting.

→ If you are using a TWAIN-compliant application and are using

[White], [Red], [Green], or [Blue] for "Light Source" in the TWAIN

driver, make sure that the "B/W Threshold" setting is appropriate. A

larger threshold value makes your output darker, while a small

threshold value makes it lighter. To adjust the threshold

automatically, click the [Auto Threshold] button on the [Image] tab of

the "Custom Settings (or Professional)" screen.

The brightness and contrast settings are not suitable.

→ If you are scanning with a TWAIN-compliant application and the

resulting image has unsuitable brightness or contrast (for example it

is too bright), click the [Auto Brightness/Contrast Adjustment] button

on the [Color] tab of the "Custom Settings (or Professional)" screen.

You can also click the [Brightness/Contrast] button to adjust the

brightness and the contrast while viewing the scanned output image

on the screen. If you are scanning with a WIA-compliant application

or the "Scanner and Camera Wizard", click [Adjust the quality of the

scanned picture] or the [Custom settings] button and adjust the

brightness and contrast.

[Quick Scan] has been selected.

→ If scanning is performed when [Quick Scan] has been selected in the

[Preference] tab of the "Custom Settings (or Professional)" of the

TWAIN driver, image quality may be degraded. This is because the

scanned data is transferred using JPEG compression. If image

quality is poor, then perform scanning again without selecting the

[Quick Scan] option. (By default [Quick Scan] is not selected.)

The original is not placed face up in the SPF or face down

on the document glass.

→ Place the original face up in the SPF or face down on the document

glass.

The original was not placed in the correct position.

→ Place the original correctly.

TROUBLESHOOTING

Page

Operation manual (for

general information

and copier)

–

Operation manual

(for general

information and

copier)

Operation manual

(for general

information and

copier)