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14 Firmware update
14.1 Preparing the USB stick
The firmware of all the CH Precision units can be updated using the USB port located at the back of the unit.
Before starting the firmware update, it is necessary to load a USB stick with files containing the new firmware.
Use a FAT32 formatted USB 2.0 stick. Please note that some USB sticks might not be detected by the P10 USB
port. CH Precision recommends the use of the USB stick that is delivered in the accessory pack of the unit. The
following procedure describes how to load the USB stick with the correct files:
Download the latest P10 firmware file from www.ch-precision.com.
Decompress the .zip file and copy the individual, decompressed files to the USB stick.
Make sure all the files are present at the root of your USB stick, and that only one version of these files is
present. Any missing file will make the firmware update procedure fail, while multiple versions of the same unit's
firmware can lead to unstable P10 behavior after the update.
14.2 Updating the unit's firmware
Perform the operations described in the section above.
Insert the USB stick into the USB port located at the back of your P10 audio unit.
Navigate to the FACTORY SETTINGS menu and select the UPDATE FIRMWARE item.
Start the Firmware Update process by pushing the central button on the front panel. Please note that the
unit can perform several resets (the display briefly turns off and on) during the procedure.
Once the firmware update is complete, the unit automatically goes into Standby mode. The front red logo LED
will switch from flashing mode to on mode. Remove the USB stick and turn the unit on. The new firmware is
now active. To verify that the firmware update was effective, navigate to the FACTORY SETTINGS menu and
select the FIRMWARE VERSION item. The displayed firmware revision should match the firmware revision of
the files copied to the USB stick.
Note: The firmware update process lasts 5-10 minutes, do NOT interrupt it!
When performing a firmware update, do NOT press any of the unit's front panel buttons, do NOT unplug the
unit from the AC wall socket and do NOT turn the mains power switch off. Interruption of the firmware update
procedure may result in corrupted firmware and a malfunctioning unit. In case something went wrong during a
firmware update and the unit is malfunctioning, apply the emergency firmware update procedure described in the
next section.
14.3 Emergency firmware update procedure
Perform the following Emergency Firmware Update procedure if your unit doesn't power up normally.
Perform the operations described in the section 'Preparing the USB stick' above.
Power the unit off (back panel mains power switch to OFF on the power supply unit).
Push the central knob of the audio unit and keep it pushed while powering up the power supply unit (flip back
panel mains power switch to ON). Keep the central knob pushed in for a couple more seconds after turning
the unit on.
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