Operating Method Of Enforced Firmware Overwriting Mode - Kenwood NX-3220 K Service Manual

5.6 Operating Method of Enforced Firmware Overwriting
Mode
Enforced firmware overwriting mode is a mode to forcibly
overwrite the transceiver firmware when the operations as
instructed in Section 2.2.2 "How to Enter Each Mode" does not
allow the transceiver to enter the firmware programming mode,
for instance, when the transceiver fails to start up due to the
transceiver failure.
(1) Prepare the followings:
• Transceiver (NX-3220 or NX-3320)
• Battery (KNB-55L, KNB-56N or KNB-57L)
• Programming interface cable (KPG-22U)
(2) Disassemble the transceiver to the condition shown in the
figure.
(3) Connect a transceiver, battery and programming interface
cable (KPG-22U).
(4) While FLDM terminal has a short-circuit with GND terminal
on the PCB, turn its power ON.
Upper: FLDM terminal
Lower: GND terminal
1-164 (No.RA053<Rev.001>)
(5) Upon startup of FLDM loader, "FIRMWARE PROG"
appears on an LCD screen.
(6) Start KFL up, select the desired firmware you wish to
overwrite, select the COM port number and baud rate, and
then click the "Write" button.
Note:
Configuring "Auto" for baud rate automatically apply
the maximal speed of baud rate allowed for a
programming cable connected to the selected COM
port number.
Upon start of overwriting on the transceiver,
"LOADING" appears on an LCD screen.
(7) Upon completion of the firmware overwriting,
"CHECKSUM xxxx" appears on an LCD screen.