Manual for CF-20

Manual for CF-20

Brand: Panasonic

Category: Tablet Computer

Document Type: Manual

Language: EN

Uploaded: Nov. 21, 2025, 6:04 p.m.

Warranty Information

Panasonic warrants Laptop PCs, Tablet PCs, and Ultra-Mobility devices for 3 years from the date of purchase.

  • Turning On/Off: Press and hold the power switch until the power indicator lights for turning on. For turning off, click Start > Power > Shut down.
  • Touchpad Operation: Use the touchpad to move the cursor and perform operations. Tap for left-click, double-tap for double-click, and press right button for right-click. Vertical scroll can be done by tracing vertically with a finger.
  • Attaching/Detaching Tablet: Ensure the tablet is detached by releasing the detach lock and sliding the release lever. To attach, push the tablet into the cradle and raise the detach lock.
  • Connecting LAN: Turn off the computer, slide and open the LAN port cover, connect the LAN cable, and then turn on the computer.
  • Wireless Communication: Use Airplane mode to disable/enable Wireless LAN, Bluetooth, and GPS. Settings can be adjusted in Network & Internet settings.

Troubleshooting and error codes

Starting Up
Cannot start up. The power indicator or battery indicator is not lit. Connect the AC adaptor.
Insert a fully charged battery.
Remove the battery pack and the AC adaptor, then connect them again.
If the battery indicator is not lit even when the AC adaptor and battery pack are correctly connected, the AC adaptor protection function may be operating. Disconnect the AC cord, wait three minutes or more, and reconnect the AC cord.
If a device is connected to the USB port, disconnect the device, or set [Tablet USB Port] or [Legacy USB Support] to [Disabled] in the [Advanced] menu of the Setup Utility.
Press ‾Fn‿ + ‾F8‿ to turn off the concealed mode.
The power is turned on but “Warming up the system (up to 30 minutes)” appears. The computer is warming up before start up. Wait for the computer to start up (takes up to 30 minutes). If, “Cannot warm up the system” is displayed, the computer failed to warm up and does not start. In this case, turn off the computer, leave it in an environment of 5 °C {41 °F} or higher temperature for about an hour, and then turn on the power once more.
Cannot turn on the computer. The computer does not resume from sleep. (The power indicator blinks rapidly in green.) Leave it in an environment of 5 °C {41 °F} or higher temperature for about an hour, then turn on the power again.
It takes time for the power indicator to light up. If the power switch is pressed immediately after the battery pack has been mounted on the computer, and while the AC adaptor is not connected, it may take about five seconds before the power indicator lights up and the computer turns on. This is because the computer is checking the remaining battery charge; it is not a malfunction.
“Remove disks or other media. Press any key to restart” or a similar message appears. If a device is connected to the USB port, disconnect the device, or set [Tablet USB Port] or [Legacy USB Support] to [Disabled] in the [Advanced] menu of the Setup Utility.
If the problem persists after removing the disk, it may be a flash memory failure. Contact Panasonic Technical Support.
The date and time are incorrect. Make the correct settings.
1. Click <0xE2><0x9A><0x9B> (Start) - <0xE2><0x9A><0x9B> (Settings) - [Time & language] - [Date & time], and select [Off] in “Set time automatically”.
2. Click [Change], and then set the day and time.
3. Click [Change], and select [On] in “Set time automatically”.
If the problem persists, the internal clock battery may need to be replaced. Contact Panasonic Technical Support.
When the computer is connected to LAN, check the date and time of the server.
The 2100 A.D. or later year will not be correctly recognized on this computer.
“Executing Battery Recalibration” screen appears. The Battery Recalibration was cancelled before Windows was shut down last time. To start up Windows, turn off the computer by the power switch, and then turn on.
Cannot resume. One of the following operations may have been carried out. Press the power switch turn on the computer. Data not saved will be lost.
In sleep mode, the AC adaptor or battery pack was disconnected, or a peripheral was connected or disconnected.
The power switch was slid for four seconds or longer to forcibly turn off the computer.
An error may occur when the computer automatically enters the sleep or hibernation mode while the screensaver is active. In this case, turn off the screensaver or change the pattern of the screensaver.
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