Here is more.
The TM-V71A / TM-V71E firmware is stored in the main processor chip which 
contains
a built-in flash ROM.
This manual describes the method of updating the firmware of the TM-V71A / 
TM-V71E.
1. Requirements
1)
A personal computer.
An IBM PC or compatible using the Windows 2000/ XP, or Windows Vista 
operating system,
with Microsoft Internet Explorer 4.0 (or higher) and Microsoft .NET 
Framework 2.0
(or higher )installed.
2)
The firmware updating program.
Downloaded self-extracting file "TM-V71_Main_V110E.exe".
3)
An optional Programming Cable
(PG-5G, or PG-5H Serial communications cable)
  is necessary.
Note
:
This firmware updating program cannot read and write user data such as 
menu items,
memory channel frequencies.
If you do not want to lose user data, save the data using the
Memory Control Program MCP-2A
  before updating the firmware and write the data back after updating the 
firmware.
2. Firmware updating program installation
1)
Execute the downloaded self-extracting file "TM-V71_Main_V110E.exe".
The file is extracted into a designated folder.
2)
In the designated folder, a folder labeled "TM-V71_Main" will be created.
In the folder labeled "TM-V71", two files "TM-V71_Main_V110_e.exe" and 
"TM-V71_Main_e.chm"are
automatically created.
3. Start TM-V71 firmware updating program
1)
Start the program by double-clicking "TM-V71_Main_V110_e.exe" icon.
2)
Select the COM Port you will use.
3)
Select the Baud Rate you will use.
You can select the communication speed from 115200/57600/38400/19200 
[bps].
(All communication speeds may not be available, depending on your PC 
hardware.)
Note
:
When a fast communication speed is selected (115200bps or 57600bps), some 
PCs cannot
reliably perform high speed serial communications.
If communication errors persist although the parameters and settings are 
correct,
select a slower communication speed, such as 19200bps.
4)
To start updating procedure, click [Update].
The following dialog box opens, explaining the firmware update procedure.
4. Firmware updating procedures
1)
Turn OFF the transceiver and remove the power supply cable from the 
transceiver.
2)
Connect the transceiver to your PC's COM Port using the Serial 
communications cable.
3)
Push and hold the [MR] and [PM] key, then turn ON the transceiver to enter 
Firmware
programming mode.
Note
:
When Cross-band Repeater mode, Channel Display mode, or Key Lock function 
is ON,
the transceiver cannot enter Firmware programming mode.
4)
"PROG" is displayed on the transceiver.
Click [OK].
5)
After confirmation of the transceiver's current firmware version, the 
following dialog
box will appear.
When you are ready, click [OK].
?
The new firmware will be transferred into the main processor flash ROM 
automatically
as follows.
?
After the firmware updating step is successfully completed, the following 
confirmation
dialog box will appear.
Click [OK].
?
The following information dialog box will appear.
Click [OK] to close the dialog box.
Note
:
If an error message appears during the update, confirm the COM Port 
setting or cable
connections, then try to update the firmware again.
5. Post Updating steps
1)
Turn OFF the transceiver.
2)
Remove the Serial communications cable from the transceiver.
3)
Push and hold the [F] key, then turn the transceiver ON.
4)
Select "FULL RESET", then push the [Tune] knob.