Topfield TF 5810 PVRt User Manual page 81

You do not need to have a television connected to the PVR
to perform an update; all the necessary information will be
displayed on the front panel.
Ensure that the PVR is connected to your computer, and is in
standby mode. Start the TFDN USB application, and click the
Find button. Locate the .tfd file and click Open.
Now, click the Download button in the main window of the
TFDN USB application; you should see a screen similar to this,
with the message Wait Download displayed.
After the firmware file has been transferred, another sequence
of numbers, beginning Ap, will be displayed, and at the end of
this sequence, the message End will flash on the display.
You must not turn your PVR off until the End message has
been displayed or your PVR restarts itself, otherwise you
may damage it by interrupting the update process.
If there is an error transferring the firmware, you may see the
letter E, followed by a number; if this happens, you should
check that you selected the correct file for your PVR, and that
the USB cable is correctly connected, before trying the firmware
update again.
6.3 Firmware updates 73
Now, press the Standby button on the
front of the PVR. The PVR will begin
to start up and then you should see a
sequence of numbers displayed on the
front panel, beginning with the letters
dn; this process usually takes less than
a minute.