How to Fix Scanner Color Mode Errors in Adobe Acrobat 2020
Question details
The user needs to resolve a color-mode error that occurs when attempting to scan documents directly into Adobe Acrobat 2020 using a Brother scanner.

- Product
- Adobe Acrobat 2020
- Device & OS
- not provided
- Scenario
- Scanning physical documents directly into PDF format using the Acrobat interface.
- Observed behavior
- Adobe Acrobat throws a color-mode error and fails to complete the scan when using the selected color settings with the connected scanner.
Ensure your scanner is powered on, securely connected to your computer via USB or network, and that you have administrator privileges to install driver updates.
Manually Update Scanner Software and Drivers
Installing the full manufacturer software package directly from the source prevents compatibility issues caused by generic operating system drivers.
Operating systems often install generic drivers during automatic updates, which may lack full TWAIN support required by Adobe Acrobat. Manually installing the manufacturer's package ensures full feature compatibility.
Navigate to the official Brother support website (or your specific scanner manufacturer's official download portal).
Locate your exact scanner model (e.g., MFC-L2750DW) and download the latest full installation software, firmware updates, and the proprietary scanning utility.
Run the downloaded installer manually to apply the native TWAIN drivers, explicitly avoiding unattended automatic OS updates for this device.

Configure Color Settings via the Scanner Interface
Bypass Acrobat's default scanning dialog by forcing the software to use the scanner's native user interface, which manages color modes more reliably.
Scan Externally and Import to Acrobat
If direct TWAIN compatibility continues to fail, scan documents using the manufacturer's standalone utility and convert them to PDF afterward.
Scan and Manage PDFs Easily with WPS Office
Bypass Acrobat's complex scanning errors by using the WPS Office PDF module. It provides a straightforward way to create PDFs directly from images or convert high-quality scanned TIFFs into fully editable, searchable PDF documents.
- 1. Open WPS PDF: Launch WPS Office and click on the 'PDF' tab from the main workspace interface.
- 2. Select Picture to PDF: Click on 'Picture to PDF' in the tool ribbon to open the conversion utility.
- 3. Import Scans: Add your externally scanned TIFF files into the dialog box and arrange the page order.
- 4. Convert to PDF: Click 'Convert' to instantly generate your PDF. You can then use the built-in OCR tool under the 'Tools' menu to make the text editable.

Frequently Asked Questions
Why does Adobe Acrobat display a color mode error during scanning?
This error generally occurs when there is a mismatch between Acrobat's internal settings and the scanner's capabilities, often caused by outdated scanner drivers, incompatible TWAIN software, or generic operating system drivers.
Should I let my operating system automatically update my scanner drivers?
It is highly recommended to manually download the full software package from the manufacturer's website. Automatic OS updates frequently install basic, generic drivers that lack full compatibility with advanced features in Adobe Acrobat.
Why is TIFF recommended over JPEG for document scanning?
TIFF utilizes lossless compression, meaning it retains the exact original image quality and the crispness of text lines. JPEG compression introduces artifacts that blur text, which can significantly reduce the accuracy of OCR software.




